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20 February 2008, Volume 27 Issue 1 Previous Issue    Next Issue

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Analysis of Cracks in Reinforced Concrete Block of Curved Girders WU Xuan-tao, ZHOU Zhi-xiang, ZENG Fan-jiang 2008, 27(1): 1-4.  Abstract ( )   PDF (265KB) ( )   The reasons for the cracks in the reinforced concrete block of curved girders were analyzed, and the formula for calculating the stress of reinforced concrete block under the effect of centrifugal force of cars was provided through the finite element software ANSYS. The measures to avoid the reinforced concrete block from cracking were discussed, which could provide the baseline for the design and construction of the reinforced concrete block. Related Articles | Metrics

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Damage Identification of Existed Multi-Girders Highway Bridges SHAN De-shan, LI Qiao, WANG Yu-jue 2008, 27(1): 5-8,16.  Abstract ( )   PDF (391KB) ( )   The damage identification method using the dynamically measured flexibility matrix to locate damages was studied. The changes in flexibility and flexibility curvature methods are adopted to identify damage. The qualitative analysis of testing noise on the detected result was also carried out. The multi -girder model that matches the real configuration of bridge structure was adopted to simulate the bridge damage. One numerical example analysis of a simplesupported multi-girders bridge was presented to demonstrate the effectiveness of the proposed methods. It is shown that the proposed approach has the potential of being a practical tool for a damage detection methodology applied to smart civil structures due to its excellent capability in dealing with the few measured mode shapes and frequencies. Related Articles | Metrics

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Creep Simulation Analysis of Baiguodu Jialing River Bridge WANG Wei-hong, WANG Yun-tao, CHEN Yu-feng, XU Zhen 2008, 27(1): 9-12.  Abstract ( )   PDF (273KB) ( )   The theory of metal creep is used to infer to the creep calculation of the concrete structure. Under the second development of the ANSYS programme, the concrete creep was replaced by the metal creep, and creep calculative procedure was worked out.The creep simulation analysis of the Baiguodu Jialing River Bridge for 30 years after completion has been realiz ed successfully, and the method and conclusions reached can be as reference. Related Articles | Metrics

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Analysis and Application of Grillage Method to Curved Girder Bridge ZHANG Fa-chun, YANG Chang-zheng 2008, 27(1): 13-16.  Abstract ( )   PDF (248KB) ( )   The grillage method is an analytical method of space structure which can simulate the original structure well, and it owns characteristics of clear basic conception and low computing cost. Therefore, it is often applied to the design of the wider, skew, curved girder bridges. The basic theory of the grillage of boxing section was introduced in detail and the solid element of ANSYS was used to verify the practicability, with the hope to supply useful reference on the grillage theory and application to designers. Related Articles | Metrics

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Completing Design Calculation and Charting for Arch Bridge by VBA LIU Guo-dong, ZHANG Min, LUO Dong 2008, 27(1): 17-19,104.  Abstract ( )   PDF (305KB) ( )   AutoCAD is widely applicated to bridge designs and auxiliary model establishment of structure analysis. Some definitions and creation methods of AutoCAD drawing objectives are introduced. Using the VBA procedure, an arch bridge design program which was composed of design, internal force calculation and drawing was developed. Finally, the environment and the operation procedure needed by VBA are described. Related Articles | Metrics

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Minimum Thickness of Reinforcing Layer of Stone Arch Bridge Strengthened by Section Enlargement Method LIU Qing-yang, ZHOU Jian-ting, WANG Ling, ZHU Xiao-long 2008, 27(1): 20-23.  Abstract ( )   PDF (280KB) ( )   Based on the allowable stress theory, considering the stress characteristics of reinforcing layer before and after reinforcement, and guaranteeing the reinforcing layer and the original structure distortion coordination as a premise, a equation about reinforcing layer thickness section destruction was established before reinforcement to determine the reasonable thickness of reinforcing layer. It provides the theory basis to guarantee the reinforcement structure works, reduces the trial calculation and the checking calculation work load, and promotes the theory development of stone arch bridge structure reinforcement. Related Articles | Metrics

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Research and Analysis of Reinforced Method for Box Ribbed Arch Bridge LI Li-feng, SHAO Xu-dong, ZHANG Yang, LI Xian-chao 2008, 27(1): 24-27.  Abstract ( )   PDF (271KB) ( )   Many cracks appear in a deck type box arch bridge, and the load test reveals that the rigidity is a little lower and dynamic response coefficient is a little higher for the bridge. A reinforced method of setting cross bracing between arches was suggested in order to enhance the transverse rigidity and structural integrality. The internal forces were analyzed pre and after reinforcement with the spatial grillage method. The analytical results reveal that about 20 percents of internal forces under the action of live load are reduced after cross bracing placed. The effect is obviously. This technique can be used in the same kind of bridges. Related Articles | Metrics

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Construction Control of Caiyuanba B Ramp Continuous Rigid Frame Bridge CHEN Si-tian, WANG Zhi-peng, LIU Peng, YUAN Yuan 2008, 27(1): 28-31,36.  Abstract ( )   PDF (300KB) ( )   The construction control of continuous rigid frame bridges which were constructed by the segmental cantilever method were studied in the light of engineering practice-Caiyuanba B Ramp Bridge, and the feasible control methods were proposed. Furthermore, influences on shrinkage and creep of the large-span bridge during its service was specially analyzed. An additional camber is considered and advised. The better connecting precision is reached, and the smooth linetype of the bridge can be formed. Related Articles | Metrics

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Method to Determine Construction Cable Tension Force of Cable-Stayed Bridge YANG Xuan, ZHOU Shui-xing 2008, 27(1): 32-36.  Abstract ( )   PDF (324KB) ( )   A practical method named as differential method to determine construction cable tension force of cable-stayed bridge was proposed. It only applies to the forward-calculation according to the construction steps. By eliminating the gap between the aimed optimum cable tension force and the cable tension force which have been calculated through the construction steps, the construction cable tension force will be got. The disadvantages often appearing in the traditional back-analysis method such as concrete shrinkage, creep and geometric non-linearity can be avoided easily. Meanwhile,an approximate law to accelerate convergence was given, and a comparison between differential method and influence matrix method was made. This method has been applied in an actual bridge structural analysis. The results show that it is feasible and effective. Related Articles | Metrics

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Study on Calculation Theory of Tunnel System Bolt Design WANG Cheng 2008, 27(1): 37-39.  Abstract ( )   PDF (184KB) ( )   Most of tunnel system bolt design are analogical between each other without any consideration of the effect of surrounding rock. Taking tunnel surrounding rock and supporting as an unifier,a surrounding rock -support system was built up to join in work. Through bearing-load arch theory, and calculation theory study of tunnel system bolt, the certain parameters were ascertained to reduce the cost of construction. Related Articles | Metrics

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Study on Minimum Longitudinal Distance of Jet Fan in Ventilation of Highway Tunnel YANG Xiu-jun, WANG Xiao-wen, CHEN Jian-zhong 2008, 27(1): 40-43,164.  Abstract ( )   PDF (331KB) ( )   The minimum horizontal distance of jet fan is important for jet fan to operate properly and economically. Through the analysis of work principle of jet fan and the air flow in the tunnel based on jet mechanics, the approach of the minimum horizontal distance of jet fan was got. Through the engineering analogy and numerical simulation of the CFD, this method for making sure the minimum longitudinal distance are accordant with the real situation. It can be reference to make sure the minimum longitudinall distance of jet fan. Related Articles | Metrics

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Application of NATM Principle to Deformation Monitoring of Shilongshan Tunnel Surrounding Rock LIU Shan-hong, LIU Yi, LI Fang 2008, 27(1): 44-48,156.  Abstract ( )   PDF (405KB) ( )   New Austrian Tunneling Method (NATM) has been widely used in dynamic monitoring and controlling of Tunnel construction. Taking Shilongshan Tunnel construction as an example, the processes applying NATM to monitoring the surrounding rock deformation stability, stress variations and shoring control were detailedly presented. Some adjustment based on the analyses of measured data was maken. The results of the application indicates that the method is efficient in controlling the stability of the surrounding rock during the tunnel construction, and it cost effectively with improved construction safety. Related Articles | Metrics

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Study on Geometric Design of Left-Turn Lane in Grade Intersection ZHANG Lan-fang, MAO Ying-ping, FANG Shou-en 2008, 27(1): 49-52,117.  Abstract ( )   PDF (353KB) ( )   Aming at the design method of left-turn lane in highway intersection, referring to the design guides in developed countries, the deficiencies in the design guide of our country were analyzed. The layout designing, width and length defining and transitional section designing of the left-turn lane were studied in detail. The geometric design method of le ft-turn lane in the highway intersection is suggested. Related Articles | Metrics

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Structural Response on Superelevation Sections of Asphalt Pavement XIAO Xing-qiang, ZHANG Li-hong, AI Chang-fa, QIU Yan-jun 2008, 27(1): 53-56.  Abstract ( )   PDF (279KB) ( )   Centrifugal force, which is ignored in general design procedures, exists and affects pavement when vehicles pass by the superelevation sections of asphalt pavement. The mechanical characteristics of superelevation sections and equations of unequal load distribution were deduced. To illustrate the influences, a typical highway pavement was modeled by finite element method. Then quantificational analyses of structural response under different velocity were conducted. Analyses in dicate that structural responses are serious when the influence of centrifugal force is taken into consider. The higher velocity, the more influences. So, both the influences of centrifugal force and the insufficiency of general design procedures are responsible for the weakness of the superelevation sections of asphalt pavement. Related Articles | Metrics

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Analysis of Pavement Responses Based on Dynamic Modulus ZHAO Yan-qing, PAN You-qiang, HUANG Rong-hua 2008, 27(1): 57-60.  Abstract ( )   PDF (301KB) ( )   The dynamic moduli at various temperatures and loading frequencies were measured for each asphalt mixture used in an asphalt pavement with flexible bases, and the dynamic modulus master curves and time-temperature shift factors were determined according to the time-temperature superposition principle. The effects of temperature and frequency on asphalt mixture properties were studied using measured pavement temperatures and well-accepted frequency prediction method. Pavement response were calculated using dynamic moduli, and the results were compared with those obtained using the method in China specification. The analysis based on dynamic modulus is more reasonable since it can take into account the effects of temperature and loading frequency. Related Articles | Metrics

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Pavement Cracks Identification Using Image Technology SUN Bo-cheng, QIU Yan-jun 2008, 27(1): 61-64,168.  Abstract ( )   PDF (357KB) ( )   Conventional visual and manual road crack detection method is labor-consuming, non-precise, dangerous, costly and it affect transportation as well. An automatic road crack detection method was described based on image process. It enhances the road image by using a mask filtrating method in the first, then segments the image by the maximum of class distance. The detecting effectiveness of the algorithm is good for the detecton of pavement crack diseases. Related Articles | Metrics

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Study on Compacted Rebound Modulus of Semi-Flexible Pavement Compound Material HUANG Fang, WU Guo-xiong, WANG Yan, ZHANG Da-ke 2008, 27(1): 65-68,133.  Abstract ( )   PDF (306KB) ( )   Through experiment data, the compacted rebound modulus of semi-flexible pavement compound material (whose porosity is 25%) was calculated. Combined this with actual metrical deflection to back-calculation compacted rebound modulus, method to determine the compacted rebound modulus of the compound pavement was discussed. With the method, the rebound modulus of mixture porosity of 20% and 30% respectively were computed, and the range of compacted rebound modulus was put forward.Finally, the relationship between compacted rebound modulus and the void was fit out. Making use of the gained equation, rebound modulus of any porosity can be determined, which provides important parameters for designing semi-flexible compound pavement. Related Articles | Metrics

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Test Study on Rut-Resistance Property of Asphalt Treated Base Mixtures HE Zhao-yi, ZHANG Zheng-guo, ZHU Hong-zhou, HAN Jun 2008, 27(1): 69-72,99.  Abstract ( )   PDF (339KB) ( )   Through rutting test for asphalt treated base mixtures with nine types of gradation and three types of asphalt, rutresistance property of asphalt treated base mixtures was studied systematicly. And the effects of gradation, asphalt, asphalt content, temperature and size of rutting test mould on rut-resistance property were analyzed. Related Articles | Metrics

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Mechanism Study on Nanometer Bentonite Modified Asphalt RAN Long-fei, HUANG Wei-rong, ZHU Bao-hua 2008, 27(1): 73-76.  Abstract ( )   PDF (337KB) ( )   The natural layered silicate of bentonite is advised to organo-insert in advance,which may exfoliate nanograins and well-decentralize into melted asphalt. The asphalt is formed nanometer strengthened composite material. Related Articles | Metrics

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Investigation on Temperature Aging of Concrete YU Zhi-gang, HAN Xi, ZHONG Li, YANG Ming-li 2008, 27(1): 77-79.  Abstract ( )   PDF (236KB) ( )   When it comes to repairing damaged structure, it requires estimating the capability of concrete after being exposed to fire.The structure will keep integrity because of good fire resisting capability. The preliminary research on the mechanical properties of the same optimum mix concrete after temperature was conducted, including compressive strength, transverse strain and longitudinal strain, and its regularity was also analyzed.The reference for the investigation on temperature aging of concrete after high temperature is proposed. Related Articles | Metrics

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Effects of Water-Rock Interaction on Development and Evolvement of Wenbituo Landslide Group FAN Wei-jia, ZHAO Ming-jie 2008, 27(1): 80-84,90.  Abstract ( )   PDF (536KB) ( )   There is an intimate connection between water and slop stability, and under the action of water, different landslides express diverse failure mechanism. Basing on the fieldwork and analysis of the Wenbituo landslide group of the Yangtse Gorges Reservoir, the work mechamism of water-rock interaction effects and the relationship between the effects and landslide were studied. The results show that:in this area,it is a maturational conditions of water-rock interaction effect that cast an important reflection on the development and evolvement of the Wenbituo landslide,by three typical action forms. Related Articles | Metrics

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Application of Grey Prediction Method to Perilous Rock Deformation ZHANG Yu-ping, TANG Hong-mei 2008, 27(1): 85-90.  Abstract ( )   PDF (454KB) ( )   Perilous rock is one of typical geologic disasters in mountain area. The monitor and prediction of perilous rock deformation are important foundation for prevention and cure of perilous rock. Grey prediction theory was applied to predict the deformation of perilous rock. GM (1,1) model and Residual Error model of perilous rock were established to realize curve fit and prediction of deformation data. Taking Nanchuan Zengzi perilous rock in Chongqing for example, GM (1,1) model and Residual Error model were built based on the subsistent data of perilous rock deformation. After accuracy checking, P=1, C=0.160 243, the precision degree is superior. Compared with the normal prediction method, Grey prediction method is more dependable. Related Articles | Metrics

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Geomorphology Research on Chained Regularity of Perilous Rock in the Area of the Three Gorges Reservoir CHEN Hong-kai 2008, 27(1): 91-95.  Abstract ( )   PDF (397KB) ( )   Formation, avalanche and movement of perilous rock are ones of dynamic evolution processes of slope in the area of the Three Gorges Reservoir. Geomorphologic formalities of cliff with anti-terraces are macro-evidences for perilous rock to evolve by stages. On the bases of investigations in real-time field to about ten thousands of perilous rock to perilous rocks and geomorphologic analysis principle, the chained regularity of perilous rock in the area of the Three Gorges Reservoir was discovered. The regularity includes micro-chain and macro-chain. Micro-chain designates for perilous rock to form surface of slope. The regularity shows two models, one belongs to simple model only with one macro-chain, and the other belongs to complex model with many macro-chains at the same time. Formation processes of rock cell and unloading of rock above the rock cell belong to the initial dynamics for perilous rock to develop. Related Articles | Metrics

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Application Improvement of Nonparametric Regression to Traffic Flow Forecast FAN Lu-ming, HE Guo-guang 2008, 27(1): 96-99.  Abstract ( )   PDF (286KB) ( )   Real-time and accurate short-term traffic flow forecast is critical to the traffic control and guidance. The nonparametric regression based on pattern recognition was presented and used for short-term traffic flow forecast. Simulation experiments were conducted to examine the validity of the method. The compute results show that this method has high precision. Related Articles | Metrics

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Study on City Motor-Vehicle Possession Scale Restrained by Road Network Capacity LI Shu-qing 2008, 27(1): 100-104.  Abstract ( )   PDF (395KB) ( )   It has become much important to study on city motor-vehicle possession scale suitable for the development of city road network capacity to solve its traffic problems. After giving the definitions of road network capacity and road network service level, the road network capacity models were built, and the method to determine city motor-vehicle possession scale restrained by road network capacity was got, so as to support the theory of transportation demand management. The method has been applied to determine the reasonable motor-vehicle possession scale of Chongqing in 2010 and in 2020. Related Articles | Metrics

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Synthetical Evaluation Research on Sustainable Developing Coordination Capability of Urban Traffic System LIU Xiao-jia 2008, 27(1): 105-108.  Abstract ( )   PDF (287KB) ( )   Combining with the character that sustainable development of urban traffic system should correspond with its population, economy, resources and environment, the index of coordination capability about sustainable development of urban traffic system was put forward, and a combined evaluation model was constructed which is made up of specialist method, information entropy method and grey relation degree method, a evaluating coordination capability. This model can analyze the correlation among indexes comprehensively and overcome the imperfectability and indetermination of in formation.It is an objective, credible and practical method by the reason of that it considers fully subjective and objective facts while confirming weight. Finally, the feasibility of the model was validated through evaluating and ordering practical coordination capability between urban traffic system and its economic development, population, resources, environment and so on, in 6 central cities in China. Related Articles | Metrics

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Research on Network Distribution Optimization of Town Public Transit CHEN Hong, XIAO Dian-liang, LIU Meng-song, LUO Jian 2008, 27(1): 109-112.  Abstract ( )   PDF (321KB) ( )   The town bus line network of our country at present is unreasonable; the hierarchical structure is not obvious; the repetitive rate of network is high, and the bus routes and coverage rate are low. For these questions, based on the principles of objectivity, feasibility and practicability,the optimization thinking, steps and methods of town and country public transit were elaborated and rationally analyzed, mainly from the aspects of fine degree order of the public transportation route, area distribute characteristics, pluging into track and pivot, feedback opinion of resident and public transit interests of transportation sector getting balanced respects. Finally the optimal program were evaluated. An example of Bao'an public transit planning was presented to prove this framework. Applied results show that this method can give a very good proper attention to various aspects benefit, and is feasible. Related Articles | Metrics

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Research on Performance Evaluation System of Rural Roads Planning and Practice MA Shu-hong 2008, 27(1): 113-117.  Abstract ( )   PDF (374KB) ( )   On the basis of the concept of performance evaluation,the concept of performance evaluation about planning and practice was discussed combined with the peculiarities of rural roads, and its content was analyzed by using three dimensional panorama analytical mathod. After discussing the relative indexes proposed by ministry of finance and ministry of communications, another index system was built according to the ideas of Values-Goals-Criteria and Standards. Then, applied the radar figure into the rural roads' performance evaluation about planning and practise. Finally, introduced the application of these methods in Zhejiang. Related Articles | Metrics

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Study on Management Information System of Construction Project of Highway YU Pei 2008, 27(1): 118-121.  Abstract ( )   PDF (260KB) ( )   According to the highway construction project characteristics, in analyses of the characteristics with data and in formation, combining the actualities of domestic highway construction project in organization and management aspects at present, briefly discussed the procedure, code, collecting, processing and sorting out, storing, searching and transmitting the project information, analyzed and set up the management information system mode which is suitable for the construction project of the highway. The foundation for the development and application of the management in formation system was established. Related Articles | Metrics

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TCM of the Engineering in Design Phase ZHANG Xiao-ting, LIU Yan 2008, 27(1): 122-126.  Abstract ( )   PDF (353KB) ( )   Design phase is the important phase of cost control which is one of the pivotal factors for smooth realization of the project, and it owns the characteristics of substantive investment,far-ranging social benefit,long time limit for a project etc. Some advices and measures to cost control in design phase were put forward according to TCM (Total Cost Management) and the better effect. Related Articles | Metrics

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Application of New FIDIC to Project Management LIU Lang, LI Hai 2008, 27(1): 127-128.  Abstract ( )   PDF (175KB) ( )   The new FIDIC (Construction Contract Terms of Civil Engineering) has already been issued. In order to get better application in the course of project management, the basic situation of the new FIDIC is briefly introduced,so that the counterpart can consults during relative engineering management. Related Articles | Metrics

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Application of Fuzzy Mathematics of Entropy Weight to Evaluating Risk of an Engineering Project SHE Na 2008, 27(1): 129-133.  Abstract ( )   PDF (363KB) ( )   From the owner's point of view, analyzed the risk which an actual engineering project always contains, calculated various risks factors using the entropy power the weight, then combined fuzzy mathematics method to establish evaluation model, to evaluate the risk factors and to draw the conclusion, with the purposes in both examining the usability of this method, and providing the effective basis in the risk management. Related Articles | Metrics

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Study on Navigable Condition on Doulizi Reach Regulation by Ship Model Test CAI Chuang 2008, 27(1): 134-138.  Abstract ( )   PDF (363KB) ( )   The small scale ship model technology has been one important method on studying navigable condition. The Doulizi reach is known as a rapid flow shoal during low water period, which lies in upstream Yangzi River. It is necessary to study on river model by small scale ship test. The ship model experiment was introduced in detail, and the contrast experiment was studied. It provides scientific foundation for Doulizi channel regulation. Related Articles | Metrics

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Research on Structure Pattern of Large Water-Head Overhand-Erection Container Wharf WANG Duo-yin, TIAN Jian-zhu 2008, 27(1): 139-143.  Abstract ( )   PDF (309KB) ( )   Based on the characteristics of harbor and channel in the Three Gorges reservoir, considering the need of port and waterway development, the construction of Chongqing Port and Waterway Center in the upper reaches of Changjiang River and the influences of wharf construction on the shipping condition of Changjiang River, shipping environment security and the capacity to release excessive water,perfect analyses were carried out on wharf structure which fits container. After that, five exc ogitations that are suitable for loading container under the condition of more than 30 meters water level were come up. Related Articles | Metrics

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Integrated Water Quantity and Quality Evaluation for Available Water Amount of Jian River WANG Miao-lin, PU Shu-hong, FU Hua 2008, 27(1): 144-147.  Abstract ( )   PDF (436KB) ( )   The integrated assessment method of available water amount according to target water quality of water functional zone is introduced. Firstly, an integrated water quantity and quality model was proposed based on the rule of the water and pollutant balance. And the parameters of the model could be obtained through the analysis on the observed data of water quantity and quality. Then the available water amount of a unit reach could be calculated by the model. Finally, the model could be spread and applied for the assessment of the available water amount of multiple reaches. The available water amount of the Jian River was calculated as a case study. The result shows that the available water amount is related to the current water pollution, the target water quality of water functional zone and the ecological water requirement of the river. Related Articles | Metrics

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Comparison of Results of Removal of Nitrogen and Phosphorus Using Different Precipitation Reagent with Technology of MAP TANG Qi 2008, 27(1): 148-151.  Abstract ( )   PDF (295KB) ( )   Using different precipitation reagent about magnesium ammonium phosphate (MAP) process, the result of removal of nitrogen and phosphorus was discussed. Some results were compared,such as the removal rate of PO43--P and the removal rate of NH3-N, the quantity of PO43--P and the quantity of NH3-N in the treated water,weight and composition of precipitation,conductivity of treated water. When high ammonia-nitrogen sweage was treated, better precipitation reagent was Na3PO4·12H2O+MgCl2·6H2O and Na3PO4·12H2O+MgSO4·7H2O. When high phosphate sweage was treated, better precipitation reagent was NH4Cl+MgCl2·6H2O and NH4Cl+MgSO4·7H2O. MAP was confirmed by the scanning microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Related Articles | Metrics

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Research Status of Pedestrian Lower Extremity Biomechanical Emulation and Legform Surrogates ZHOU Kong-kang, CHEN Ke, HUANG Jun-ming, LIU Yong-xuan 2008, 27(1): 152-156.  Abstract ( )   PDF (398KB) ( )   Summarized recent literature regarding the lower extremity protection for pedestrians and analyzed lower extremity injury patterns and grades based on the Pedestrian Crash Data Study (PCDS) database. The current surrogate le gforms and associated test procedures were compared. All of these provide the reference for the further study of lower extremity injury. Related Articles | Metrics

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Finite Element Method on Truck Crane Rear Frame Improving Design LU Zhao-feng, QIN Min, LUO Tian-hong 2008, 27(1): 157-160.  Abstract ( )   PDF (356KB) ( )   The finite element model of a truck crane rear frame was established using the MSC/patran and MSC/nastran. The maximum stress area and the strain distribution in the rear frame was obtained. The result of calculation accorded with that of the experiment, and it was applied to improving design. The final result proves the effectiveness and feasibility of feasibility of the methods. Related Articles | Metrics

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Numerical Simulation Analysis on Fluid Property of Adiabatic Capillary ZHANG Fu-ren, HU Qi-guo, LI Wei 2008, 27(1): 161-164.  Abstract ( )   PDF (244KB) ( )   Based on the model of approximate analytic solution to adiabatic capillary and the pressure and flux of choked flow situation, combining the integral model, the method of calculating of the flow property and relative parameters was advanced. The precision and applicability of this model has been approved by comparing with the results of relative experimentation and references. Related Articles | Metrics

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Study on Common Information Platform for ITS WU Bo, CAO Shou-ming, SU Ri-na 2008, 27(1): 165-168.  Abstract ( )   PDF (316KB) ( )   At present,the situation of each application system is used independently and some information islands exist in intelligent transportation systems, and a lot of information can't be used effectively. The functions of common information platform (CIP), such as data exchange,data fusing and data mining were analyzed,then a system frame of common information platform was presented. The functions of each component of CIP were analyzed carefully. In the end, the advantages of CIP for ITS were discussed. Related Articles | Metrics

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Research on Fuzzy Optimization of Empty Container Repositioning of Land-Carriage WANG Bin, WANG Zhong-chen 2008, 27(1): 169-172.  Abstract ( )   PDF (269KB) ( )   The optimization model of empty container repositioning of land-carriage is built, making use of fuzzy programming. Based on the optimization model, the project of the lost cost is acquired under different transport time and outlay. The aim of the paper is to provide a land-carriage repositioning project of the lost cost under varied transport cost and time. So the empty container management level of a shipping company is raised. Related Articles | Metrics