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Simulation-based automatic generation of risk scenarios

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Journal of Systems Engineering and Electronics 2011年第3期22卷 437-444页

作者： Jinghui Li Rui Kang Ali Mosleh xing pan School of Reliability and Systems Engineering Beihang UniversityBeijing 100191P.R.China Center for Risk and Reliability University of MarylandCollege ParkMD 20742USA

A methodology for automatically generating risk scenarios is *** main idea is to let the system model ＂express itself＂ through *** is achieved by having the simulation model driven by an elaborated simulation engine,which：（i） manipulates the generation of branch points,*** occurrence times;（ii） employs a depth-first systematic exploration strategy to cover all possible branch paths at each branch *** addition,a backtracking technique,as an extension,is implemented to recover some missed risk scenarios.A widely discussed dynamic reliability example（a holdup tank） is used to aid in the explanation of and to demonstrate the effectiveness of the proposed methodology.

关键词： risk scenario automatic generation simulation risk assessment dynamic reliability.

Resilience based importance measure analysis for SoS

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Journal of Systems Engineering and Electronics 2019年第5期30卷 920-930页

作者： pan xing WANG Huixiong YANG Yanjing ZHANG Guozhong School of Reliability and Systems Engineering Beihang UniversityBeijing 100191China China Railway Signal and Communication Corporation Beijing 100070China Institute of Systems Engineering China State Shipbuilding CorporationBeijing 100036China

In a system of systems(SoS),resilience is an important factor in maintaining the functionality,stability,and enhancing the operation *** the perspective of resilience,this paper studies the importance of the SoS,and a resilience-based importance measure analysis is conducted to provide suggestions in the design and optimization of the structure of the *** this paper,the components of the SoS are simplified as four kinds of network nodes:sensor,decision point,influencer,and *** this networked SoS,the number of operation loops is used as the performance indicator,and an approximate algorithm,which is based on eigenvalue of the adjacency matrix,is proposed to calculate the number of operation *** order to understand the performance change of the SoS during the attack and defense process in the operations,an integral resilience model is proposed to depict the resilience of the *** different perspectives of enhancing the resilience,different measures,parameters and the corresponding algorithms for the resilience importance of components are ***,a case study on an SoS is conducted to verify the validity of the network modelling and the resiliencebased importance analysis method.

关键词： system of systems (SoS) resilience network modelling importance measure analysis operation loop

Simulation and uniform design-based automatic generation of risk scenarios

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Journal of Systems Engineering and Electronics 2011年第6期22卷 1015-1022页

This paper presents a methodology for automatically generating risk scenarios for dynamic reliability applications in which some dynamic characteristics(e.g.,the order,timing and magnitude of events,the value of relevant process parameters and initial conditions) have a significant influence on the evolution of the *** main idea of the methodology is:(i) making the system model "express itself" through simulation by having the model driven by an elaborated simulation engine;(ii) exploiting uniform design to pick out a small subset of representative design points from the space of relevant dynamic characteristics;(iii) for each selected design point,employing a depth-first systematic exploration strategy to cover all possible scenario branches at each branch point.A highly dynamic example adapted from the literature(a chemical batch reactor) is studied to test the effectiveness of the proposed methodology.

关键词： risk scenarios automatic generation simulation uniform design dynamic reliability.

Multi-parameters uncertainty analysis of logistic support process based on GERT

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Journal of Systems Engineering and Electronics 2014年第6期25卷 1011-1019页

作者： Yong Wu xing pan Rui Kang Congjiao He Liming Gong School of Reliability and Systems Engineering Beihang University Board of Deputies of Air Force Ordnance and General Equipment Military

The uncertainty analysis is an effective sensitivity analysis method for system model analysis and optimization. However,the existing single-factor uncertainty analysis methods are not well used in the logistic support systems with multiple decision-making factors. The multiple transfer parameters graphical evaluation and review technique（MTP-GERT） is used to model the logistic support process in consideration of two important factors, support activity time and support activity resources, which are two primary causes for the logistic support process uncertainty. On this basis,a global sensitivity analysis（GSA） method based on covariance is designed to analyze the logistic support process uncertainty. The aircraft support process is selected as a case application which illustrates the validity of the proposed method to analyze the support process uncertainty, and some feasible recommendations are proposed for aircraft support decision making on carrier.

关键词： logistic support process uncertainty analysis graphi-cal evaluation and review technique(GERT) sensitivity analysis

HEP quantification strategy based on modified CREAM

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Journal of Systems Engineering and Electronics 2019年第4期30卷 815-822页

作者： pan xing WANG Huixiong LIN Ye LIU Tun WANG Xiaoxia School of Reliability and Systems Engineering Beihang University

The accurate quantification of human error probability(HEP) has long been a main pursuit for most human reliability analysis(HRA) methods. This paper proposes a strategy to analyzeand predict human error on the basis of a further modification of theexisting cognitive reliability and error analysis method (CREAM)in HRA. Through providing a broader definition for the key parametersused in the quantification method, this paper produces arelatively flexible strategy to determine the nominal HEP (HEP0).Basing on this strategy, the actual quantification of HEP in CREAMis able to be applied to more verified conditions. To prove the validityof the method proposed, a case study of spacecraft launch isalso introduced, in which the prediction derived from the method isproved consistent with real field data.

关键词： human reliability cognitive reliability and error analysismethod(CREAM) context influence nominal human errorprobability(HEP0)

韧性视角下苏州古城历史社区更新策略研究——以大儒巷社区为例

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华中建筑 2025年第1期43卷 108-112页

作者：唐世闯潘星朱建达苏州科技大学建筑与城市规划学院

在快速城市化的背景下,古城面临的风险挑战与日俱增,亟需进行更新升级。基于韧性视角下选取苏州古城的大儒巷社区作为研究对象,通过对其现状特征进行分析梳理,认为韧性视角下古城历史社区在应对外界冲击时应具有稳健性、冗余性和连通性... 详细信息

在快速城市化的背景下,古城面临的风险挑战与日俱增,亟需进行更新升级。基于韧性视角下选取苏州古城的大儒巷社区作为研究对象,通过对其现状特征进行分析梳理,认为韧性视角下古城历史社区在应对外界冲击时应具有稳健性、冗余性和连通性的特征,并根据苏州古城的特点提出与水乡建筑糅合、与水乡空间融合、与水网街巷契合的韧性思路,最后针对现状问题探讨了基于韧性理念的古城历史社区保护与韧性提升策略,以期能够促进苏州古城历史社区的安全可持续发展。

关键词：韧性视角苏州古城历史社区更新策略大儒巷社区

维普期刊数据库博看期刊

Comparative Proteomic Analysis of Wheat (Triticum aestivum L.) Hybrid Necrosis

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Journal of Integrative Agriculture 2013年第3期12卷 387-397页

作者： JIANG Qi-yan HU Zheng pan xing-lai ZHANG Hui National Key Facilities for Crop Genetic Resources and Improvement Institute of Crop Sciences Chinese Academy of Agricultural Sciences Food Crop Science Department Cotton Research Institute Shanxi Academy of Agriculture Sciences

Hybrid necrosis is the gradual premature death of leaves or plants in certain Fj hybrids of wheat （Triticum aestivum L.）. Comparison of protein expression in necrotic and normal wheat leaves showed that the abundance of 33 proteins was changed significantly, and 24 of these proteins were identified. These proteins were involved in plant growth and development, antioxidation, photosynthesis and carbon assimilation, amino acid and protein biosynthesis, cytological signal transduction, DNA and RNA modification, protein transport, folding and assembly according to their functions. The down-regulation of uroporphyrinogen decarboxylase and the up-regulation of lipoxygenases in necrotic leaves may be related to the oxidative stress in the necrotic cells. The heat shock proteins may play the cytoprotective role. The differential expression of photosynthesis and carbon assimilation related proteins indicated chlorophyll biosynthesis and chloroplast development were inhibited and might finally cause the gradual chlorosis and cell death in necrotic leaves. The results of this study give a comprehensive picture of the post-transcriptional response to necrosis in hybrid wheat leaves and serve as a platform for further characterization of gene function and regulation in wheat hybrid necrosis.

关键词： hybrid necrosis proteomic wheat differentially expressed protein

Experimental study on uniaxial time-dependent ratcheting of a polyetherimide polymer

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第10期11卷 804-810页

作者： Dou-xing pan Guo-zheng KANG Zhi-wu ZHU Yu-jie LIU School of Mechanics and Engineering Southwest Jiaotong University Chengdu 610031 China

The uniaxial ratcheting behavior of a polyetherimide (PEI) polymer 'TECAPEI' was studied using stress-controlled cyclic loading at room temperature, including both cyclic tension-compression with non-zero tensile mean stress and tension- unloading tests. The experimental observations were focused on the time-dependent ratcheting of the PEI polymer revealed in cyclic tests at diverse stress rates and with different peak stress holding times. The results showed that the PEI polymer shows obvious ratcheting deformation; i.e., the ratcheting strain accumulates progressively in the tensile direction during stress- controlled cyclic tests with non-zero mean stress. The ratcheting is highly dependent on the applied mean stress and stress am-plitude, and is also characterized by a strong time-dependency during the cyclic stressing at diverse stress rates and with different peak stress holding times. The time-dependent ratcheting of the PEI polymer is caused mainly by its remarkable viscosity. A comparison of the ratcheting occurring before and beyond the ultimate stress point of the PEI polymer showed that the ratcheting beyond the ultimate stress point is more significant than that occurring before that point.

关键词： Polyetherimide (PEI) polymer Uniaxial ratcheting Time-dependence Cyclic loading Viscosity

Partial embolization as re-treatment of hypersplenism after unsuccessful splenic artery ligation

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World Journal of Gastroenterology 2015年第4期21卷 1365-1370页

作者： Zheng-Ju Xu Lian-Qiu Zheng xing-Nan pan Clinical Liver Center 180~(th) Hospital of the People’s Liberation Army

Ligation of splenic artery(LSA) is used for the treatment of liver cirrhosis with hypersplenism. However, hypersplenism is not significantly improved following LSA treatment in some cases, and there are few reports of retreatment of hypersplenism after LSA. We report the case of a47-year-old man with liver cirrhosis and hypersplenism who underwent LSA treatment, but did not significantly improve. Laboratory tests revealed severe leukocytopeniaand thrombocytopenia. Celiac computed tomography arteriogram and digital subtraction angiography revealed two compensatory arteries connected to the hilar splenic artery from the left gastro-epiploic artery and from the dorsal pancreatic artery. Partial splenic embolization(PSE) was performed through the compensatory arteries. As a result, the patient achieved partial splenic ischemic infarction, and white blood cell and platelet counts rose and remained in the normal range. PSE is an effective therapeutic modality for the retreatment of hypersplenism when other modalities have failed.

关键词： Hypersplenism Partial splenic embolization Splenic