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Analytical Method for Joint Equation of Vehicle-Bridge Coupling Vibration Mao Guohui,Wang Xiaosong,Zheng Hongfei 2013, 32(1): 1-4.  DOI: 10.3969/j.issn.1674-0696.2013.01.01 Abstract ( )   PDF (277KB) ( )   Vehicles and bridge oscillation equations were built respectively according to d’Alembert theory and finite element theory.The displacement of the bottom contact points of tires can be got from bridge nodal displacement by applying shape function interpolation.Then the contact point force which is equivalent to bridge unit nodes force was put into the bridge vibration equation and thus overall vibration equation of vehicle-bridge coupling vibration combing both vehicles and bridge oscillation equations was formed.In addition,Newmark-β method of numerical integration was applied to solve the equations.The result shows that this method and the classic iteration method are identical. References | Related Articles | Metrics

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Analysis of Bridge Impact Coefficient with Vehicles Xu Huadong 2013, 32(1): 5-8.  DOI: 10.3969/j.issn.1674-0696.2013.01.02 Abstract ( )   PDF (319KB) ( )   The vibration balance equation for a quarter vehicle and bridge were derived with the employment of d’Alembert principle. The bridge surface roughness was obtained by trigonometric series method. The effects of bridge surface roughness,vehicle velocity and vehicle parameters on impact coefficient were studied by numerical method. The research shows that the influence due to the bridge surface roughness is significant; impact coefficient is fluctuating with increasing vehicle velocity; reasonable vehicle parameters can decrease impact action to the bridge; natural frequency is also an important factor to impact coefficient. References | Related Articles | Metrics

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Experimental Research on External Prestressed Strengthening of Reinforced Concrete Arch Bridge Ding Wei,Xiang Zhongfu 2013, 32(1): 9-13.  DOI: 10.3969/j.issn.1674-0696.2013.01.03 Abstract ( )   PDF (451KB) ( )   In order to validate the feasibility of this experimental research on external prestressed strengthening of reinforced concrete arch bridge,the model test was completed. The vaults and arch feet were respectively strengthened,and then the changes of the strain and deflection in vaults,arch feet and the quarter section were analyzed. The results show that the bearing capacity of main arch ring can be better. The effect of reinforcement is significant,thus this method is feasible and reliable. References | Related Articles | Metrics

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Application of Hilbert-Huang Transform in CFST Void Detection Based on Acoustic Vibration Signal Han Xi,Xiang Li,Zhong Li,Yang Jin,Chen Hui 2013, 32(1): 14-17.  DOI: 10.3969/j.issn.1674-0696.2013.01.04 Abstract ( )   PDF (513KB) ( )   The void detection method based on Hilbert-Huang Transform in Concrete Filled Steel Tube ( CFST) was proposed. The acoustic vibration signal for CFST with transient impact was analyzed. The instantaneous amplitude feature samples were extracted,and the improved K-means clustering method was used to do second-class pattern recognition for the feature samples. Thus the void in CFST was judged. The result shows this method is feasible. References | Related Articles | Metrics

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Experimental Research on Monitoring Technology of Incisive Network Zhang Xu,Zhang Benniu 2013, 32(1): 18-22.  DOI: 10.3969/j.issn.1674-0696.2013.01.05 Abstract ( )   PDF (515KB) ( )   A study on the monitoring mechanism of incisive network for bridge crack monitoring was conducted. First,the experiment for simulating the situation of the actual monitoring on crack width was carried out to get the experiment data on the relationship between crack width and residual elongation,and to get comparative result of shear-lag model to verify their validity and. Then,the effect of the monitoring system with result of crack monitoring for the actual bridge was verified,thus to establish a new monitoring indicators of cracks monitoring system on incisive network. References | Related Articles | Metrics

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Risk and Countermeasures of Shield Tunneling in River-Crossing Tunnel Shi Jinwei,Wang Xuejun 2013, 32(1): 23-26.  DOI: 10.3969/j.issn.1674-0696.2013.01.06 Abstract ( )   PDF (273KB) ( )   Nanjing Yangtze River tunnel engineering was taken as an example to analyze various risks in the shield construction in river-crossing tunnel systematically and comprehensively. These risks of shield construction in working well,shield crossing mid-river,oversized shield instability,segment sealed accident,ground movement in construction and shield tail freezing process were discussed,and the corresponding measures were put forward. The results provide experience and technical reference for a similar shield construction in risk assessment and safety management. References | Related Articles | Metrics

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Study on Rational Structure of Shed-Tunnel under Seismic Loading Wu Chenyu,Gao Feng 2013, 32(1): 27-31.  DOI: 10.3969/j.issn.1674-0696.2013.01.07 Abstract ( )   PDF (609KB) ( )   Taking the tunnel adjacent to the mountain as an object,the principal stress and displacement of different shedtunnel structure were calculated under seismic loading. The seismic response of shed-tunnel was analyzed by the finite element program ANSYS,the Drucker-Prager yield criterion was used as a criterion and the static-dynamic unitized artificial boundary as boundary condition. The results showed that the aseismatic capability of the semi-arch shed-tunnel with oblique column was superior than that with straight column; the aseismatic capability of the arch-style was better than that of the column- style shed-tunnel; the distribution rule of stress was changed as a result of different connection way of cross beam and column-style shed-tunnel; interface of slope and filling layer may slip in the earthquake. References | Related Articles | Metrics

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Influence of Subgrade Dry-Wet State on Mechanical Response of Asphalt Pavement Gu Yunlin,He Xiangcheng,Yang Qianrong 2013, 32(1): 32-36.  DOI: 10.3969/j.issn.1674-0696.2013.01.08 Abstract ( )   PDF (449KB) ( )   The mechanical response of asphalt pavement under different condition of dry-wet subgrade was studied by BISAR3 software from the perspective of pavement mechanics. The change of the displacement,normal stress and shear stress of every layers were analyzed by roadbed resilient modulus and connection status between the layers. The results show that subgrade dry-wet state has great influence on asphalt pavement structure,especially the displacement and the bottom normal stress,and shear stress. References | Related Articles | Metrics

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Performance Study on Anti-Rutting MPE Modified Asphalt Mixture Huang Weirong,Cui Tong 2013, 32(1): 37-40.  DOI: 10.3969/j.issn.1674-0696.2013.01.09 Abstract ( )   PDF (305KB) ( )   Through adopting MPE and SBS modifiers，the adhesion of base asphalt with granite，MPE modified asphalt and crushed stone were studied comparatively． The road properties of acid granite gravel mixed separately with base asphalt，SBS modified asphalt both including anti-stripping agent and MPE modified asphalt were also researched． Firstly，the adhesion rank of MPE modified asphalt mixed with granite gravel is the fifth level． Secondly，the dynamic stability of AC-13 asphalt with MPE is more than 6000 mm per stroke at 60℃，more than 5000 mm per stroke at 70℃ and more than 2000 mm per stroke at 80℃． Moreover，the Marshall stability of asphalt mixtures with MPE is 35% higher than that of matrix asphalt mixtures，and 23% higher than that of 5% SBS modified asphalt mixture． Besides，bits immersion residual stability reaches 98% which increases by 11% compared with that of matrix asphalt mixtures and by 5% compared with that of SBS modified asphalt mixtures． Lastly，its TSR reaches 97% which increases by 8% compared with that of matrix asphalt mixtures． References | Related Articles | Metrics

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Specific Surface of Drainage Asphalt Mixtures Based on Fractal Theory Lin Nan,Guo Feng,Chen Huaxing 2013, 32(1): 41-45.  DOI: 10.3969/j.issn.1674-0696.2013.01.10 Abstract ( )   PDF (382KB) ( )   The solutions of these characteristic properties by analyzing the distribution of different particle sizes，gradation， total volume，void rate，and specific surface area were provided，and then the relationship of volume fractal dimension ( DV ) and surface area fractal dimension ( DS ) was put forward. According to the tendency of grading curve，specific surface area could be calculated by different grading sections separately. The result presents that the value of surface area is affected by different section dividing manners greatly; this shows the recommend to calculate specific surface area with different grading sections step by step. References | Related Articles | Metrics

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Bonding Performance of Fiberglass-Polyester Paving Mat in Humid Climate Cao Xuejuan,Li Guoming,Wang Jian,Rui Jie,Cheng Zhiqiang,Zhan Qiqi 2013, 32(1): 46-49.  DOI: 10.3969/j.issn.1674-0696.2013.01.11 Abstract ( )   PDF (385KB) ( )   The dosage and type of bonding oil about fibreglass-polyester paving mat were confirmed through the UTM shear test． The cement asphalt，anti-cracking material and cement concrete test specimens were made，and then the shear strength of them was tested through UTM． The bonding strength of different anti-cracking materials was tested by pulling-out test． The results show that the SBS modified asphalt layer should be used as bonding oil，and its best dosage is 1． 0 kg /m2 ; the bonding performance of fibreglass-polyester is better than others under different humid climates; and the fiberglass-polyester has a better bonding performance than other anti-cracking materials in the same humid climate． References | Related Articles | Metrics

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Application of Surface Wave Exploration Method in Quality Detection of Filling Embankment Compaction Zhou Junping,Wang Kui,Liu Yunlai 2013, 32(1): 50-53.  DOI: 10.3969/j.issn.1674-0696.2013.01.12 Abstract ( )   PDF (358KB) ( )   Fluctuating signals in the highway filling embankment were collected by the surface wave tester，and the wave velocity based on the cross spectrum was analyzed． The compaction test specimen was manufactured by use of the packing of the construction site，and the wave velocity of it was tested． Then，the relationship between the wave velocity and the compaction degree of the compaction specimen was obtained and the compaction of the construction site was calculated by use of the rating curve． The results show that the wave velocity and the compaction degree of the embankment have good corresponding relationship，and the compaction of the fill subgrade section can be reflected by the wave velocity，and thus to realize the compaction quality of the embankment nondestructive testing and rapid monitoring． References | Related Articles | Metrics

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Study on Embankment Wind Velocity Field Considering Driving Safety in Cross Wind Hu Peng,Pan Xiaodong 2013, 32(1): 54-57.  DOI: 10.3969/j.issn.1674-0696.2013.01.13 Abstract ( )   PDF (660KB) ( )   In order to research the wind velocity field of embankment，infinite element models were built and wind velocity field of different height embankment was simulated． Field testing methods were also employed to measure wind velocity and the simulation results were verified． Wind velocity area which affected driving safety was calculated． The results show that the higher the embankment is，the higher the local area wind velocity is，especially in windward shoulder and travel lane． The results also provide theory bases for driving safety in cross wind． References | Related Articles | Metrics

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Research on Application of Wave Theory in Geotechnical Engineering Sun Xiao,Zhao Mingjie,Wang Kui,Xun Yang 2013, 32(1): 58-62.  DOI: 10.3969/j.issn.1674-0696.2013.01.14 Abstract ( )   PDF (365KB) ( )   The development of wave theory was reviewed． The main aspects and the latest advances of wave theory in geotechnical engineering test were summarized． The development trend of wave theory has been proposed at last． References | Related Articles | Metrics

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Characteristics Study on Moisture Migration in Soil Slope under Rainfall Wen Guangju,Deng Wenjie,Liao Peiwei 2013, 32(1): 63-67.  DOI: 10.3969/j.issn.1674-0696.2013.01.15 Abstract ( )   PDF (555KB) ( )   Based on the feature of slope failure induced by rainfall，from the point of view of moisture migration and combining unsaturated soil mechanics，the characteristics of moisture migration in slope under different rainfall intensities were analyzed by finite element method． The results reveal that under rainfall，the pore water pressure in slope is distributed in layer: the pore water pressure at the bottom is the highest，the lower at the top and the lowest at the middle． The moisture migrates mainly along in vertical and tilt direction． The migration velocity decreases from the surface to the deep，and the migration direction also changes with depth and time． The volumetric water content is nonlinear distributed and the degree of nonlinear in unsaturated area is higher than that of the saturated area． The permeability coefficient of soil rises with the increase of rainfall intensity，and when the soil is saturated，its permeability coefficient is saturate permeability coefficient． References | Related Articles | Metrics

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Influence of Setting Position and Shape of Bolt-Grouting Body on Slope Fixation Effect Jiang Zhikun,Yan Qiurong,Yan Fu 2013, 32(1): 68-74.  DOI: 10.3969/j.issn.1674-0696.2013.01.16 Abstract ( )   PDF (793KB) ( )   Grouting treatment is an effective method for treatment． In order to reveal the effect principle of bolt-grouting body to slope fixation，strength reduction of Finite Element Method ( FEM) has been used． Through this method，the deformation of bolt-grouting body and the stability coefficient of slope have been calculated． The results show that putting the bolt-grouting body into the slope can improve the stability of slope，and setting the bolt-grouting body vertically is better than setting it horizontally; the best position of bolt-grouting body is at about 1 /3 height of the slope; the influence of the angel between bolt-grouting body and slope to slope fixation effect is significant． References | Related Articles | Metrics

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Fuzzy Evaluation on Influence Factors of Chongqing Underground Space Deng Shuyong,Liu Lang 2013, 32(1): 75-79.  DOI: 10.3969/j.issn.1674-0696.2013.01.17 Abstract ( )   PDF (455KB) ( )   Through the analysis of influence factors on underground space in Chongqing，which includes geology，law，environment， management，environmental，social and economic，security and other factors，the index system on evaluation of each influence factors was built． The comprehensive evaluation model of underground space factors based on AHP was put forward． Four underground spaces in Chongqing were evaluated，and the result proved the method was effective． References | Related Articles | Metrics

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Pavement Performance Evaluation Based on SOM Neural Network Fan Chang’e,Li Dehua 2013, 32(1): 80-82.  DOI: 10.3969/j.issn.1674-0696.2013.01.18 Abstract ( )   PDF (466KB) ( )   At present，the evaluation method of asphalt pavement is insufficient． Thus one evaluation method was put forward based on self-organizing feature map neural network ( SOMNN) ． Four main factors including driving quality，the damage condition of pavement，the bearing capacity of structure and the anti-skidding performance of pavement were selected to evaluate the using performance of asphalt pavement based on the self organization feature map neural network． Finally，an example was calculated to compare the results between the traditional method and the current method． The results show that， compared with the commonly used method，the current method is reasonable and effective． References | Related Articles | Metrics

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Traffic Control and Management in Road Maintenance Engineering Meng Fankun,Chen Guangjiao,Ju Yongfeng,Du Kai 2013, 32(1): 83-86.  DOI: 10.3969/j.issn.1674-0696.2013.01.19 Abstract ( )   PDF (515KB) ( )   The two kinds of feasible integral road network traffic organization scheme，“single side full-closed traffic organization and part section of traffic organization”，were compared and evaluated． By using traffic simulation software VISSIM， the service level of highway maintenance work zone was classified; the reserved length values of extension control region and the whole road network planning traffic organization scheme were discussed． Shandong Donggang freeway was taken as a traffic organization plan，and the reasonable mathematical model and the traffic simulation system model were established． The scientific and reasonable traffic control and management method was proposed and applied in Shandong Yantai-Weihai highway maintenance construction，and also provide a scientific basis for the future maintenance． References | Related Articles | Metrics

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Traffic Safety Evaluation Method for Highway Section Based on Fault Tree Niu Shifeng,Zheng Yongxiong,Feng Shadan,Shi Hui 2013, 32(1): 87-90.  DOI: 10.3969/j.issn.1674-0696.2013.01.20 Abstract ( )   PDF (455KB) ( )   In order to estimate the main reasons resulting in traffic safety decreasing of highway section，and give proper evaluation index weights，a traffic safety evaluation method for highway section was designed based on fault tree theory． The established method of fault tree，evaluation index and index weight determining method and comprehensive evaluation model were explained using the horizontal curve section as example． The proposed method was validated by true data of highway section． The result shows the proposed method not only can evaluate the overall safety of highway section，but also to determine main reasons resulting in traffic safety decreasing of highway section． References | Related Articles | Metrics

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Calculation Model Research on Equivalent Death Toll in Traffic Accidents Cao Jianjun 2013, 32(1): 91-94.  DOI: 10.3969/j.issn.1674-0696.2013.01.21 Abstract ( )   PDF (563KB) ( )   The existing problems in the calculation model of equivalent death toll were analyzed by comparative and mathematical statistic analysis etc． And a calculation model with lost workdays was proposed including actual death toll，grave injury， minor injury，slight injury and the direct economic loss． The determination basis of 1 people death corresponding to 5000 lost workdays was ascertained． Grave injuries were classified into 11 types，which corresponding range within the 11 conversion coefficient was in 0． 06-1． When disability classification was not or cannot obtained，grave injured conversion coefficient was determined to be 0． 51． And the method of conversion coefficient definition of minor injury，slight injury and the direct economic loss was provided． References | Related Articles | Metrics

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Driver’s Face Positioning Method Based on Color Space and Face Fu Kai,Ge Ruhai,Fu Hongyu,Jin Qiao 2013, 32(1): 95-98.  DOI: 10.3969/j.issn.1674-0696.2013.01.22 Abstract ( )   PDF (510KB) ( )   A fast method for the detection and location of the driver’s facial area was introduced． Firstly the image was mapped into YCbCr space and the skin Gaussian model was built． Secondly driver’s face area was got by likelihood figure adaptive threshold segmentation． The processed binarization image should be carried out morphology operation to eliminate burrs and holes． Finally the facial image was processed with gray integral projection to get driver’s face area． The test shows this method has effectiveness and timeliness． References | Related Articles | Metrics

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Operating Efficiency Evaluation of City Rail Transit Station Yan Dongmei,Xiang Hongyan,Shao Yiming 2013, 32(1): 99-102.  DOI: 10.3969/j.issn.1674-0696.2013.01.23 Abstract ( )   PDF (424KB) ( )   Through analysis of city rail transit system，the evaluation system about transfer efficiency of the city rail transit transfer station was established with the consideration of infrastructure，operation，and informationization． According to grey system theory，efficiency appraisal model of city rail transit station was established based on the synthesis gray weighted connection method． Finally，Chongqing rail transit station was taken as an example，of which many targets and sorts were evaluated． The results indicate that the evaluation model has the feasibility and the usability． References | Related Articles | Metrics

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Fatigue Test on Bogie Frame of Straddle-Type Monorail Train Based on IMC Wen Xiaoxia,Du Zixue,Jiang Baojun,Li Jihui 2013, 32(1): 103-107.  DOI: 10.3969/j.issn.1674-0696.2013.01.24 Abstract ( )   PDF (667KB) ( )   Straddle-type monorail train bogie frame was regarded as the test object． The strain gauge was layout at dangerous situation of the frame． By using the half-bridge wiring method and applying portable data collector CI of IMC，the stress time history data of the measuring point placed the dangerous situation was collected at 30， 35， 40， 45 km/h speed． After the collected data was cut，filter，smooth，delayed treatment and discarded invalid amplitude，the program of rain-flow counting and S-N material curve were complied． By the program，the fatigue damaged values under different speed，different filter were calculated． Based on the test data，the function of damaged value and speed were set up，and the fatigue life in different running speed was predicted． References | Related Articles | Metrics

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Routing Mechanism for VANET Clustering in Urban Environment Song Jun,Yang Luxia,Sun Jianle,Hu Jinyu 2013, 32(1): 108-111.  DOI: 10.3969/j.issn.1674-0696.2013.01.25 Abstract ( )   PDF (577KB) ( )   Vehicular Ad hoc Networks ( VANET) is one kind of Ad hoc networks in which moving vehicles are communication nodes． Due to the high mobility of vehicles，the traditional Ad hoc routing technologies are not suitable for the rapid change of VANET topology． Considering the vehicles’mobility in urban environment，plus hierarchical structure is easy to manage and expand for wireless networks，a bus-based clustering routing mechanism for VANET in urban environment was proposed． It established a cluster and took the bus as the cluster head． The other vehicles were the cluster members and the optimal cluster was chosen by the velocity，and the routing protocol was operated on the basis of the clustering． Simulation experimental results indicate that the mechanism is improved in packet delivery ratio and network stability． References | Related Articles | Metrics

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Multi-Body Dynamics Model Building of Self-Balancing Dual-Wheeled Vehicle Using ADAMS and MATLAB Yang Zhigang,Tian Lang,Shan Shaohua 2013, 32(1): 112-117.  DOI: 10.3969/j.issn.1674-0696.2013.01.26 Abstract ( )   PDF (634KB) ( )   On the basis of the vehicle design，the multi-body dynamics model was built by using ADAMS，and constituted a hybrid simulation model with MATLAB/Simulink． MATLAB/Simulink models were established with the combination of the mathematical model of existing self-balanced dual-wheeled vehicle and the design parameters of the develop vehicle． The two models received the same input． By analyzing the simulation results of the two models，it’s found that mixed model of ADAMS and MATLAB also can demonstrate the state of vehicle motion accurately． This method of such a hybrid model of selfbalancing dual-wheel based on ADAMS can provide a new way for the dynamics simulation of the other electromechanical systems． References | Related Articles | Metrics

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Fuzzy Control Simulation of Electro-Rheological Fluid Engine Mount Huang Dingyou,Chen Shaoliang,Zhang Jinwen 2013, 32(1): 118-121.  DOI: 10.3969/j.issn.1674-0696.2013.01.27 Abstract ( )   PDF (789KB) ( )   Fuzzy control theory was applied to the vibration control of ER engine mount． Based on the mathematical model of the engine vibration system，and the fuzzy control rules which were established with experiences and theoretical analysis，a joint simulation of the engine vibration systems of both ordinary hydraulic mount and electro-rheological fluid mount was performed using MATLAB software． The results show that，because of the use of fuzzy control，ER engine has a better vibration isolation effect than ordinary hydraulic suspension． References | Related Articles | Metrics

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Structural Design and Test Study of MR Damper Lan Wenkui,Yuan Miaoda,Zhang Jinyuan 2013, 32(1): 122-125.  DOI: 10.3969/j.issn.1674-0696.2013.01.28 Abstract ( )   PDF (669KB) ( )   The MR dampers of the single-stage and two-stage magnetic，on which the experiment has been done by servo test machine． The characteristics of dynamometer curve of these two kinds of MR dampers under different excitation current effect and the characteristics of speed curve were analyzed． The tests results demonstrate that the damping force range of two-stage MR damper is greater than the same structure of single-stage MR damper，which provide a basis for further optimization of MR damper． References | Related Articles | Metrics

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Parametric Design System of Structural Parts for Bus Air Suspension Zhang Xiaobo,Chen Kunshan 2013, 32(1): 126-130.  DOI: 10.3969/j.issn.1674-0696.2013.01.29 Abstract ( )   PDF (682KB) ( )   The parametric design method of complex product and the product design based on case-based reasoning were introduced to the design of bus air suspension，and the product-level parametric models for bus air suspension were analyzed and built． The case library for bus air suspension was established，and the design interface was developed utilizing UG secondary development tools． The parametric design system of structural parts for bus air suspension was established based on COM and Access 2007 database in Visual C ++ environment． An air suspension was selected as the example to describe the process of parametric design． The given parametric model shows that the system for bus air suspension is feasible and effective． References | Related Articles | Metrics

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Study on Energy Utilization Ratio of Light Vehicle Based on 15-Mode Test Cycle Zhang Peng,Chu Jiangwei 2013, 32(1): 131-135.  DOI: 10.3969/j.issn.1674-0696.2013.01.30 Abstract ( )   PDF (484KB) ( )   On the basis of the foreign and domestic research status on driving conditions，the research models of energy consumption were summarized and the concepts of energy consumption，energy state and energy utilization ratio were presented． According to the driving distance of vehicle under the acceleration，deceleration and idle speed conditions and the free driving distance，the different energy utilization ratio models were established and applied to the Europe 15-Mode Test Cycle without considering air resistance． The energy utilization ratio of light vehicle，including the energy utilization ratio of full travel distance，half travel distance and free travel distance was calculated． The result shows the energy is not fully utilized and there is greater space to use the energy effectively，and provides the recommendations for the vehicle safety，energy saving and environmental protection． References | Related Articles | Metrics

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Design and Development of Car’s GPS Based on Linux Lu Wenchang,Zhu Lin,Chen Long,Wang Ruochen 2013, 32(1): 136-138.  DOI: 10.3969/j.issn.1674-0696.2013.01.31 Abstract ( )   PDF (528KB) ( )   As an important part of the intelligent transportation system，on-board GPS system achieves real-time positioning and monitoring of the moving vehicles． The creation of the system was based on the TQ2440 embedded development board which was produced by Embedsky Tech for the hardware platform and took Linux operating system as software platform． The first step was the selection of development platform and the establishment of the system architecture; the second step was the design of system function; next，Mapinfo7． 0 was used to draw electronic map，and the relevant program was compiled in QT framework，and the finished program was transplanted into ARM development board; the last step was the realization of data acquisition，maps scanning and GPS positioning function． References | Related Articles | Metrics

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Design of Intelligent Vehicle Navigation and Phone System Liu Jun,Shi Cunjie,Wei Longping,Yu Jiefa 2013, 32(1): 139-142.  DOI: 10.3969/j.issn.1674-0696.2013.01.32 Abstract ( )   PDF (601KB) ( )   An embedded intelligent vehicle phone and navigation system was designed based on S3C2410 microprocessor， WinCE 6． 0 embedded operating system，GSM，GPS，GPRS and standard RS232 serial port communications technology． The system main module circuit design was introduced in detail，as well as design process and implementation process of the main function of the software system． The system can conveniently realize the functions of vehicle phone，satellite navigation， and wireless Internet access，and also can establish a connection with the vehicle monitoring center through the network to implement online navigation， vehicle scheduling，vehicle monitoring service，etc． The system has a very broad application prospects in vehicle networking and intelligent transportation systems in the future． The platform has low cost，small size，convenient installation，and high reliability and stability characteristics． References | Related Articles | Metrics

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Vision Stability Analysis of Rear-View Mirror Based on ABAQUS Ge Ruhai,Gao Hongfan 2013, 32(1): 143-146.  DOI: 10.3969/j.issn.1674-0696.2013.01.33 Abstract ( )   PDF (580KB) ( )   Traditional methods can not control the dynamic performance of rear-view mirror in the early stages． The advanced structural design work only can be done based on experience without knowing the specific dynamic performance． CAE method was used to shorten the development cycle and to reduce the development costs． In CAE analysis，the FEA model was simplified reasonably． Mirror angle method was first used in preparing for the post-processing． In the end，the experiment was done to confirm the FEA method． References | Related Articles | Metrics

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Changes of Channel Flow Conditions of Fuling-Changshou Reach at Initial Period of Three Gorges Reservoir Impoundment Luo Hong 2013, 32(1): 147-151.  DOI: 10.3969/j.issn.1674-0696.2013.01.34 Abstract ( )   PDF (928KB) ( )   To study the channel conditions and trends in the Yangtze River from Fuling to Changshou since the impoundment of Three Gorges Reservoir，a large of hydrological data of water level along the reservoir area and flow data of representative hydrologic station were collected． One-dimensional flow mathematical model was used to calculate the navigation flow conditions including water depth，flow speed，slope from Fuling to Changshou under third-level characteristic flow at initial period of Three Gorges Reservoir impoundment． Flow condition changes were analyzed comparatively，and channel condition improvement was briefly introduced． References | Related Articles | Metrics

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Effect of Changjiang Chongqing Dashaba Sand Excavation on Channel He Yang,Yang Shengfa,Zhang Shuaishuai,Wu Guomao 2013, 32(1): 152-156.  DOI: 10.3969/j.issn.1674-0696.2013.01.35 Abstract ( )   PDF (887KB) ( )   Taking the artificial sand-excavation engineering of Chongqing Dashaba in Yangtze River as an example，the flow conditions of the tentative sand-excavation region were analyzed by the 2D-model on water，with the emphasis focusing on the channel and water area condition of the sand excavation． The results show that following the designed sand-excavation approaches and quantities would have no obvious unfavorable influences on the channel． References | Related Articles | Metrics

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Review of Hydrodynamics of Lock Filling and Emptying System Chen Ming,Xuan Guoxiang,Chen Mingdong 2013, 32(1): 157-160.  DOI: 10.3969/j.issn.1674-0696.2013.01.36 Abstract ( )   PDF (478KB) ( )   Based on the large amount of research achievements at home and abroad，the studies on the lock filling and emptying system were systemly expatiated and analyzed by the research methods on lock filling and emptying system，lock energy dissipater，cavitation and in-chamber ship’s mooring forces． Moreover，the issues to be researched and settled have been discussed． References | Related Articles | Metrics

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Hydraulic Model Test of Spillway in Kaixian Tianbai Hydropower Station Cheng Yingpeng,Zhou Xifa,Zhao Yiguo,Xie Long,Yang Jinjing 2013, 32(1): 161-163.  DOI: 10.3969/j.issn.1674-0696.2013.01.37 Abstract ( )   PDF (458KB) ( )   Preliminary design of Kaixian Tianbai Hydropower Station has been finished． The hydraulic physical model was established to investigate whether reservoir discharge could meet the needs in the flood，whether the spillway tunnel produced cavitations，and the safety of buildings． Discharge capacity of spillway and negative pressure situation of lower chute section were calculated and verified through tests． References | Related Articles | Metrics

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Optimum Design Model Test of Curving Spillway of Zhongzuipo Hydropower Li Liqiang,Yang Shengfa,Liu Teng 2013, 32(1): 164-168.  DOI: 10.3969/j.issn.1674-0696.2013.01.38 Abstract ( )   PDF (793KB) ( )   With reference to the preliminary design of Zhongzuipo hydropower project，whether the project can fulfill the flood discharge requirement when the flood comes，whether cavitation erosion would happen in tunnel for flood discharge and whether there could be damages to building safety were explored． Meanwhile the calculation of curve segment of the flood discharge of the hydropower project was optimized by test． References | Related Articles | Metrics

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Examples for Map Information“Finding”and Application Xu Xi 2013, 32(1): 169-172.  DOI: 10.3969/j.issn.1674-0696.2013.01.39 Abstract ( )   PDF (683KB) ( )   Map has three features，which are calculability with special mathematic principle，legibility with special cartology language，and overview with logical cartology principle． Because information in the modern world huge increases and new types of information comes out every day，map is a useful tool for expressing things，finding useful information and analyzing problem． References | Related Articles | Metrics

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Spatial Distribution Strategies for Public Housing Based on Social Justice Shi Hao,Meng Weijun 2013, 32(1): 173-176.  DOI: 10.3969/j.issn.1674-0696.2013.01.40 Abstract ( )   PDF (506KB) ( )   By reviewing the history of urban development mode and other countries’experience in residential justice，on the basis of investigation in Xi’an，the social justice of public housing was analyzed． Some suggestions for spatial distribution for public housing were provided for incentive policies on different construction roles and scientific planning． References | Related Articles | Metrics