19,793 research outputs found
Resume: HU JianPing\u27s Selected Works and Exhibitions Participated
No full textThis resume notes several selected works made and exhibitions participated of HU Jianping from 1985-1991; it is hand-written and is scripted in Chinese. (Jerry Wu\u2723).https://digital.kenyon.edu/zhoudocs/1115/thumbnail.jp
The GPS Data Collection and Transmission Strategy for Floating Vehicle Technology
No full textFloating vehicle equipped floating vehicle technology has been widely used to collect urban and inter-urban road network traffic data for network evaluation, traffic management and dynamic road guidance purposes. It has become one of the major technologies of Intelligent Transport Systems (ITS). Most of the commonly used floating vehicle devices receive floating vehicle data in a frequency of 1 Hz. To collect real time traffic data of the road network for the above application, floating vehicle data from floating vehicles has to be transmitted from vehicles to a traffic data management centre in short time intervals. With the increase in the numbers of floating vehicles, the cost on communication increases dramatically. This is often one of the major barriers limiting the application of floating vehicle technologies for real time traffic route guidance and many other applications. This paper proposes a floating vehicle - floating vehicle data transmission strategy, which can significantly reduce the data transmission cost with satisfied accuracy for real time traffic management and dynamic road guidance purposes
Bus priority using pre-signals
No full textThe need to provide efficient public transport services in urban areas has led to the implementation of bus priority measures in many congested cities. Much interest has recently centred on priority at signal controlled junctions, including the concept of pre-signals, where traffic signals are installed at or near the end of a with-flow bus lane to provide buses with priority access to the downstream junction. Although a number of pre-signals have now been installed in the U.K., particularly in London, there has been very little published research into their design, operation and optimisation. This paper addresses these points through the development of analytical procedures which allow pre-implementation evaluation of specific categories of pre-signals. The paper initially sets out three categories of pre-signal, which have different operating characteristics, different requirements for signalling and different impacts on capacity and delay. Key issues concerning signalling arrangements for these categories are then discussed, together with a summary of the analytical approach adopted and the assumptions required. Equations are developed to allow appropriate signal timings to be calculated for pre-signalised intersections. Further equations are then developed to enable delays to priority and non-priority traffic, with and without pre-signals, to be estimated with delay being taken here as the key performance criterion. The paper concludes with three application examples illustrating how the equations are applied and the impacts of pre-signals in different situations.The analyses confirm the potential benefits of pre-signals, where these signals apply to non-priority traffic only. Where buses are also subject to a pre-signal, it i
Cyclists' path planning behavioral model at unsignalized mixed traffic intersections in China
No full textStudy on the cyclist's path planning behavior in mixed traffic flow intersection is very important. The paper presents a fuzzy logic based behavior model to describe cyclist path planning behaviors at unsignalized intersections in mixed traffic flow situations (with many conflicts among motorcars, non-motor vehicles and pedestrians). Field data have been collected for fuzzy logic modeling, model calibration and validation, and the simulation results are promising. The model can be used in mixed traffic flow simulation and path planning models for Personal Mobility Vehicles (PMVs).<br/
Simulation study of at-grade LRT at signalized intersections
No full textSIGLEAvailable from British Library Document Supply Centre- DSC:DX182210 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
A study on cyclist behavior at signalized intersections
No full textA study on the cyclist behavior at a signal-controlled intersection was conducted to determine the behavioral characteristics representative. The study focused on the cyclists' behavior at signalized intersections, including the crossing speeds, crossing gap/lag acceptance behavior, and group-riding behavior. Traffic data were collected by using video cameras from a wide and complex signalized intersection. The statistical analysis of data was conducted to determine the characteristics of bicycle traffic crossing speeds, gap/lag acceptance, and group riding. Interesting group behavior of cyclists at a signal-controlled intersection was discovered and analyzed. The results are useful for understanding the performance of mixed traffic at signalized intersections and building microscopic simulation models
Radiographic features of congenital thumb duplication type C2 of Wu et al. classification: new subtypes and surgical strategies
No full textObjective: This study aimed (i) to evaluate the radiographic characteristics of patients with congenital thumb duplication (CTD) type C2 according to the classification of Wu et al., (ii) to describe the various subtypes of type C2 CTD, and (iii) to propose a classification system that allows the identification of different surgical strategies based on the radiographic anatomy of this specific subtype of duplication.
Methods: We retrospectively reviewed 92 patients (92 thumbs) with type C2 CTD according to the Wu et al. classification in our institution between August 2015 and April 2021. All CTDs were classified according to the interphalangeal joint alignment of the main thumb at the posteroanterior radiograph of the thumb before operation: type I (no deviation), type II (ulnar deviation), and type III (radial deviation).
Results: All CTDs (n = 92) could be classified according to the proposed classification system: 76 (82.6%) were type I, 10 (10.9%) were type II, and six were type III (6.5%). According to the Kim system of subtype classification, there were 55 (59.8%) type 1, 24 (26.1%) type 2, and 13 (14.1%) type 3 cases.
Conclusions: The suggested classification completes the Wu et al. system and has the potential to guide surgical treatment in children with type C2 CTD.
Level of evidence: III.Objective: This study aimed (i) to evaluate the radiographic characteristics of patients with congenital thumb duplication (CTD) type C2 according to the classification of Wu et al., (ii) to describe the various subtypes of type C2 CTD, and (iii) to propose a classification system that allows the identification of different surgical strategies based on the radiographic anatomy of this specific subtype of duplication. Methods: We retrospectively reviewed 92 patients (92 thumbs) with type C2 CTD according to the Wu et al. classification in our institution between August 2015 and April 2021. All CTDs were classified according to the interphalangeal joint alignment of the main thumb at the posteroanterior radiograph of the thumb before operation: type I (no deviation), type II (ulnar deviation), and type III (radial deviation). Results: All CTDs (n = 92) could be classified according to the proposed classification system: 76 (82.6%) were type I, 10 (10.9%) were type II, and six were type III (6.5%). According to the Kim system of subtype classification, there were 55 (59.8%) type 1, 24 (26.1%) type 2, and 13 (14.1%) type 3 cases. Conclusions: The suggested classification completes the Wu et al. system and has the potential to guide surgical treatment in children with type C2 CTD. Level of evidence: III
Naturally occurring physalins from the genus Physalis: A review
No full textWu, Jiangping, Zhao, Jianping, Zhang, Tao, Gu, Yucheng, Khan, Ikhlas A., Zou, Zhongmei, Xu, Qiongming (2021): Naturally occurring physalins from the genus Physalis: A review. Phytochemistry (112925) 191: 1-25, DOI: 10.1016/j.phytochem.2021.112925, URL: http://dx.doi.org/10.1016/j.phytochem.2021.11292
Comparative study on recognition of transportation system under real and UE status
No full textTransportation system is a complex, large, integrated and open system. It’s difficult to recognize the system with analytical methods. So, two neural network models are developed to recognize the system. One is a back propagation neural network to recognize ideal system under equilibrium status, and the other is a counter propagation model to recognize real system with probe vehicle data. By recognizing ideal system, it turn out that neural network can simulate the process of traffic assignment, that is, neural network can simulate mapping relationship between OD matrix and assigned link flows, or link travel times. Similarly, if real-time OD matrix is obtained by probe vehicle technology, and then similarly results like link travel times can be obtained by similarly models. By comparing outputs of two models, difference about real and ideal transportation system can be found
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