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| 1 | Standard Analysis for Transfer Delay in CTCS-3显示文摘According to the standard for the GSM for railway(GSM-R) wireless systems in China train control system level 3(CTCS-3),the control data transfer delay should be no larger than 500 ms with greater than99% probability.Coverage of both non-redundant networks and intercross redundant networks and cases of single Mobile terminals(MTs) and redundant MTs on one train are considered,and the corresponding vehicle-ground communication models,delay models,and fault models are constructed.The simulation results confirm that the transfer delay can meet the standard requirements under all cases.In particular,the probability is greater than 99.996% for redundant MTs and networks,and the standard of transfer delay in CTCS-3 will be improved inevitably. | CAO Yuan MA Lianchuan XIAO Shuo ZHANG Xia XU Wei | 2017 | Chinese Journal of Electronics2017，26，5： | 12 |
| 2 | Design and Analysis of Double One Out of Two with a Hot Standby Safety Redundant Structure显示文摘In the rail transit system,the running foundation of the computer control system is required to be highly reliable,available and safe.A redundant system structure of double one out of two with a hot standby applied to the safety computer platform of the train control system is proposed in this paper.Considering the common cause failure,fault diagnosis rate,repair rate and switching success rate,the Markovian approach is adopted for modeling four safety redundant structures,including two out of three,double one out of two,one out of two with a hot standby and double one out of two with a hot standby.The calculation of the failure rate and PFH values is carried out with MATLAB to evaluate the reliability,safety and influencing factors of each structure.The final conclusion is that double one out of two with a hot standby structure can be best in the aspect of both reliability and safety with appropriate DC andβparameters. | WEN Jiakun CAO Yuan MA Lianchuan DU Siqi | 2020 | Chinese Journal of Electronics2020，29，3： | 4 |
| 3 | Molecular Characterisation of the Faecal Microbiota in Patients with Type II Diabetes显示文摘 | Xiaokang Wu Chaofeng Ma Lei Han Muhammad Nawaz Fei Gao Xuyan Zhang Pengbo Yu Chang’an Zhao Lianchuan Li Aiping Zhou Juan Wang John E. Moore B. Cherie Millar Jiru Xu | 2010 | Current Microbiology2010，，1： | 2 |
| 4 | Safety Mechanism Design and Verification of Safety Computer Parallel Program显示文摘The extensive application of Commercial off-the-shelf(COTS) components into safety computers in train control systems has caused safety problems. Aiming at the parallel programs, a concurrent program safety management mechanism based on transactional memory is proposed. The proposed mechanism implements concurrent behaviors of the application in the safe policy. A verification framework based on invariant proof and parallel separation logic theory is designed and operating system operation semantics are given for mathematical reasoning and proving. An example of code execution process is demonstrated to explain the safety control process of concurrent safety mechanism. The results indicate that the program can meet the safety and reliability requirements of concurrent safety computer platforms. | ZHANG Yuzhuo HONG Chunhua CAO Yuan MA Lianchuan WEN Yinghong | 2018 | Chinese Journal of Electronics2018，27，6： | 2 |
| 5 | Research on the logic monitoring method for the cloud computing based safety computer显示文摘With the development of railway construction in China,the computing demand of the train control system is increasing day by day.The application of cloud computing technology on the rail transit signal system has become a research hotspot in recent years.How to improve the safety and availability of the safety computer platform in the cloud computing environment is the key problem when applying cloud computing to the train operation control system.Since the cloud platform is in an open network environment,fac-ing many security vulnerabilities and malicious network attacks,it is necessary to monitor the operation of computer programmes through edge safety nodes.Firstly,this paper encrypts the logical monitoring method,and then proposes a secure computer de fence model based on the dynamic heterogeneous redundancy structure.Then the continuous time Markov chain(CTMC)is used to quantitatively solve the stable probability of the system,and the influence of different logical monitoring methods on the anti-attack performance of the system is analysed.Finally,the experiment proves that the dynamic heterogeneous redundancy structure composed of encryption logic monitoring can guarantee the safe and stable operation of the safety computer more effectively. | Yaran Yang Lianchuan Ma Tao Tang Huan Ding Zhen Liu | 2023 | Transportation Safety and Environment2023，5，2： | 1 |
| 6 | Research on Virtual Coupled Train Control Method Based on GPC&VAPF显示文摘Improving transportation efficiency is an eternal research hotspot in rail transit system.In recent years,the train operation control method based on virtual coupling has attracted the attention of many scholars.The method of train coordination and anti-collision control is not only the key to realize the virtual coupling of train,but also the key to ensure the safety of train operation.Therefore,based on the existing research,a virtual coupled train dynamics model with nonlinear dynamics is established.Then,the parameters of the operation process model of the nonlinear virtual coupled train are identified by the recursive least squares method based on realtime data,which is applied to the variable parameter artificial potential field(VAPF)for parameter identification.A fusion controller based on feature-based generalized model prediction(GPC)and VAPF is used to control the virtual coupled train and prevent collision.Finally,the validity of the proposed method is verified by using real high-speed railway data. | CAO Yuan YANG Yaran MA Lianchuan WEN Jiakun | 2022 | Chinese Journal of Electronics2022，31，5： | 0 |
| 7 | Biodiversity Risk and Opportunity Assessment in BAT Cooperative Tobacco-growing Areas显示文摘Using the method in Biodiversity Risk and Opportunity Assessment Handbook of British American Tobacco Biodiversity Partnership,we assess biodiversity risks and opportunities in BAT and China's cooperative tobacco-growing areas. The assessment results indicate that there are 8 risks and 1 opportunity. Action and monitoring plans have been made for medium and high risks as well as opportunity,to reduce impact on biodiversity. | Long XU Jingming WANG Kun FENG Yanfa CAI Bin LI Honghui YIN Dafei LI Lianchuan ZHOU Ying MA Gang WANG Pengcheng LIU Runtao LI Changhua ZHOU Ke YANG Jian CHEN | 2016 | Asian Agricultural Research2016，8，2： | 0 |
| 8 | Characterization of soil low-molecular-weight organic acids in the Karst rocky desertification region of Guizhou Province, China显示文摘Soil low-molecular-weight (LMW) organic acids play important roles in the soil-forming process and the cycling of nutrients in Karst regions. In this study, we quantified the contents of LMW organic acids (including lactate, acetate, formate, malate, and oxalate) in soil solution over the Karst region of Guizhou Province, China using ion chromatography. The concentration of total LMW organic acids in topsoil solution ranged from 0.358 to 1.823pmol'g-1, with an average of 0.912p.mol.gL The mean concentrations of lactate, acetate, formate, malate, and oxalate were 0.2124-0.089, 0.3024-0.228, 0.301-4-0.214, 0.014zk0.018 and 0.086+0.118 pmol.g-% respectively. There were also significant difference in the contents of these acids among four phases of rocky desertification, and their concentrations decreased with the aggravation of rocky desertification. The concentrations of the LMW organic acids were significantly positive correlated each other. Significant positive correlations were also observed among individual LMW organic acids in soil solution, and between them and soil available P, available K, exchange- able Ca, respectively. Furthermore, the concentrations of LMW organic acids were significantly positively corre- lated with inorganic anions (chlorides, nitrates, and sulfates) in Karst topsoil solution. Therefore, the concen- trations of soil LMW organic acids might be one of driving force in the Karst rock desertification process in Guizhou Province. | Xiaoliang LI Kiaomin CHEN Xia LIU Lianchuan ZHOU Xinqiang YANG | 2012 | Frontiers of Environmental Science & Engineering2012，6，2： | 0 |
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