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Bayesian synthetic evaluation of multistage reliability growth with instant and delayed fix modes

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Journal of Systems Engineering and Electronics 2008年第6期19卷 1287-1294页

作者： Yan Zhiqiang li Xinxin xie Hongwei Jiang Yingjie Coll. of Mechatronic Engineering and Automation National Univ. of Defense Technology Changsha 410073 P. R. China

In the multistage reliability growth tests with instant and delayed fix modes, the failure data can be assumed to follow Weibull processes with different parameters at different stages. For the Weibull process within a stage, by the proper selection of prior distribution form and the parameters, a concise posterior distribution form is obtained, thus simplifying the Bayesian analysis. In the multistage tests, the improvement factor is used to convert the posterior of one stage to the prior of the subsequent stage. The conversion criterion is carefully analyzed to determine the distribution parameters of the subsequent stage＇s variable reasonably. Based on the mentioned results, a new synthetic Bayesian evaluation program and algorithm framework is put forward to evaluate the multistage reliability growth tests with instant and delayed fix modes. The example shows the effectiveness and flexibility of this method.

关键词： reliability growth Bayesian analysis improvement factor multistage test Weibull process

Multiple biomarkers response in maize (Zea mays L.)during exposure to copper

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Journal of Environmental Sciences 2006年第6期18卷 1182-1188页

作者： QI Xue-mei li Pei-jun liU Wan xie li-jing Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate School of Chinese Academy of Sciences Beijing 100039 China College of Energy and Environmental Engineering Shanghai University of Electric Power Shanghai 200090 China College of Resource and Environment North East Agriculture University Harbin 150030 China

Biomarkers in higher plants played an important role to estimate exposure effects of pollutants in soil ecosystem and have received increasing attention in recent years. The qualitative and quantitative modifications arising in amplified fragment length polymorphism （AFLP） profiles as a measure of DNA effects were compared with a number of parameters, namely, the root length, total soluble protein content in root tips, chlorophylls content and shoot size to select the most sensitive biomarker responding to copper stress in the range of 0--600 mg/kg. The changes occurring in AFLP profiles of root tips following Cu treatment included loss of normal bands and appearance of new bands and variation in band intensity in comparison to that of the normal seedlings, A reduction in root length was observed at the 200 mg/kg of copper, which was accompanied with a decrease in total soluble protein content. According to their sensitivity to the copper toxicity, the above indicator rank in the following order： AFLP profiles 〉 total soluble protein content 〉 root length 〉 chlorophylls content 〉 shoot. We concluded that the AFLP offered a useful alternative hiomarker assay for the detection of genotoxic effects of environmental pollutants.

关键词： copper biomarker genotoxicity DNA damage

Study on improvement of conductivity of Cu-Cr-Zr alloys

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Rare Metals 2007年第2期26卷 124-130页

作者： li Huaqing xie Shuisheng WU Pengyue MI Xujun General Research Institute for Nonferrous Metals State Key Laboratory for Fabrication and Processing of Nonferrous Metals Beijing 100088 China

The influence of alloying, heat treatment, and plastic working on the performance of Cu-Cr-Zr alloys was investigated. The precipitated phases were characterized as Cr, Cu51Zr14 and Cu5Zr. Cu-Cr-Zr alloys demonstrate combination properties of high strength and high conductivity after solution treatment, aging treatment, and plastic deformation. Precipitation course of Cr is the main factor that influences the conductivity of Cu-Cr-Zr alloys, while adding Zr in the alloys adjusts the orientation relationship between Cr and matrix, and tends to increase the conductivity of aged Cu-Cr-Zr alloys after deformation.

关键词： Cu-Cr-Zr alloys electrical conductivity alloying heat treatment plastic deformation

Algorithm for the multidisciplinary management of hemorrhage in EUS-guided drainage for pancreatic fluid collections

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World Journal of Clinical Cases 2018年第10期6卷 308-321页

作者： Tian-An Jiang li-Ting xie Department of Ultrasound the First Affiliated Hospital College of Medicine Zhejiang University

Pancreatic fluid collections(PFCs),common sequelae of acute or chronic pancreatitis,are broadly classified as pancreatic pseudocysts or walled-off necrosis according to the revised Atlanta *** ultrasound(EUS)-guided drainage is often considered a standard first-line therapy preferable to surgical or interventional radiology approaches for patients with symptomatic ***-guided drainage is effective and successful;it has a technical success rate of90%-100%and a clinical success rate of 85%-98%.Recent studies have shown a 5%-30%adverse events(AEs)rate for the *** most common AEs include infection,hemorrhage,perforation and stent ***,a severe and sometimes deadly outcome,requires a well-organized and appropriate treatment ***,few studies have reported the integrated management of hemorrhage during EUS-guided drainage of *** a practical therapeutic strategy is an essential and significant step in standardized *** aim of this review is to describe the current situation of EUS-guided drainage of PFCs,including the etiology and treatment of procedure-related bleeding as well as current problems and future *** propose a novel and meaningful algorithm for systematically managing hemorrhage *** our limited knowledge,a multidisciplinary algorithm for managing EUS-guided drainage for PFC-related bleeding has not been previously reported.

关键词： Pancreatic fluid collections Hemorrhage Endoscopic ultrasound-guided Treatment algorithm Adverse events

Specialized endoplasmic reticulum-derived vesicles in plants:Functional diversity,evolution,and biotechnological exploitation

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Journal of Integrative Plant Biology 2022年第4期64卷 821-835页

作者： xie li Xifeng li Baofang Fan Cheng Zhu Zhixiang Chen College of life Science Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang ProvinceChina Jiliang UniversityHangzhou 310018China Department of Botany and Plant Pathology Center for Plant BiologyPurdue UniversityWest Lafayette IN 47907-2054USA

A central role of the endoplasmic reticulum(ER)is the synthesis,folding and quality control of secretory *** proteins usually exit the ER to enter the Golgi apparatus in coat protein complex II(COPII)-coated vesicles before transport to different subcellular ***,in plants there are specialized ER-derived vesicles(ERDVs)that carry specific proteins but,unlike COPII vesicles,can exist as independent organelles or travel to the vacuole in a Golgi-independent *** specialized ERDVs include protein bodies and precursor-accumulating vesicles that accumulate storage proteins in the endosperm during seed *** ERDVs also include precursor protease vesicles that accumulate amino acid sequence KDEL-tailed cysteine proteases and ER bodies in Brassicales plants that accumulate myrosinases that hydrolyzes *** functionally specialized ERDVs act not only as storage organelles but also as platforms for signal-triggered processing,activation and deployment of specific proteins with important roles in plant growth,development and adaptive *** specialized ERDVs have also been exploited to increase production of recombinant proteins and *** we discuss our current understanding of the functional diversity,evolutionary mechanisms and biotechnological application of specialized ERDVs,which are associated with some of the highly remarkable characteristics important to plants.

关键词： endoplasmic reticulum-derived vesicles ER body glucosinolates myrosinases precursor accumulating vesicles precursor protease vesicles prolamins protein body ricinosomes zeins

Review on charging model of sand particles due to collisions

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Theoretical & Applied Mechanics Letters 2020年第4期10卷 276-285页

作者： li xie Junjie li Yakui liu College of Civil Engineering and Mechanics Lanzhou UniversityLanzhou 730000China Key Laboratory of Western Disaster and Environmental Mechanics Attached on Education Ministry of ChinaLanzhou UniversityLanzhou 730000China

In this paper, the models describing the charge transfer between two sand particles due to collisions are reviewed. By comparing the experimental results and the calculated results by the models carried on an individual particle due to a single collision, it indicates the Mosaic model is more reasonable to describe the collision charging mechanism. The Mosaic model cannot only describe the dependence of the collision charges on the relative collision speed and the particle size, but also reveal the relationship between the collision charges with the environmental temperature, the relative humidity and the material parameters, e.g., the absorption energy. Based on the Mosaic model, the model to describe the charges transfer due to multiple collisions is also developed, which can be used to calculate the charges carried by sand particles due to multiple collisions in the wind blown sand flux.

关键词： Charging model Sand particles Contact electrification

Numerical Study of Scale Effects of Ultra-Thin Nickel Beams

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Journal of Rare Earths 2004年第z2期22卷 170-173页

作者： li Lei xie Shuisheng Yang Haoqiang Huang Guojie General Research Institute for Non-Ferrous Metals Beijing 100088China General Research Institute for Non-Ferrous MetalsBeijing 100088China General Research Institute for Non-Ferrous MetalsBeijing 100088China General Research Institute for Non-Ferrous MetalsBeijing 100088China

Recent experiments have shown that metallic materials display significant size effects when the characteristic length scale of non-uniform plastic deformation is close to a micron. Couple stress plasticity has been developed to explain such phenomena by Fleck and Hutchinson. The mechanical behaviors of ultra-thin nickel beams in different boundary conditions were studied with the hybrid element developed for couple stress plasticity before. Strong scale effects are found when the beam's thickness is close to the material characteristic length scale. Such phenomena will disappear if the beam' s thickness is greatly larger than the material characteristic length scale. The scale effect is the beams inherent property and it does not change with the change of support conditions.

关键词： scale effect MEMS couple stress plasticity hybrid element

Seepage effects of groundwater and its make-up water on triggering ground subsidence

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Journal of University of Science and Technology Beijing 2006年第1期13卷 11-15页

作者： Zhenhua Ouyang Meifeng Cai Changhong li Mowen xie Civil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China

The functioning mechanism of groundwater and its make-up water in the process of ground subsidence was studied from such three aspects as osmotic corrasion, osmotic pressure effect and concretion effect, As to osmotic corrasion, its forming conditions, mechanical mechanism and process were analyzed, As to osmotic pressure effect, it was mainly studied from hydrostatic pressurizing effect, sop softening effect and negative pressure sealing effect. Through concretion and saturation of soil, the factors of concretion settlement were analyzed. The results showed that both groundwater and its make-up water are important triggering factors to ground subsidence.

关键词： groundwater make-up water ground subsidence seepage effect

An Investigation of the Effects of Wave State and Sea Spray on an Idealized Typhoon Using an Air-Sea Coupled Modeling System

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Advances in Atmospheric Sciences 2012年第2期29卷 391-406页

作者： liU Bin GUAN Changlong li’an xie ZHAO Dongliang Department of Marine Earth and Atmospheric SciencesNorth Carolina State UniversityRaleighNC 27695USA Physical Oceanography Laboratory Ocean University of ChinaQingdao 266100

In this study, the impact of atmospherewave coupling on typhoon intensity was investigated using numerical simulations of an idealized typhoon in a coupled atmospherewaveocean modeling system. The coupling between atmosphere and sea surface waves considered the effects of wave state and sea sprays on airsea momentum flux, the atmospheric lowlevel dissipative heating, and the wavestateaffected sea spray heat flux. Several experiments were conducted to examine the impacts of wave state, sea sprays, and dissipative heating on an idealized typhoon system. Results show that considering the wave state and seasprayaffected seasurface roughness reduces typhoon intensity, while including dissipative heating intensifies the typhoon system. Taking into account sea spray heat flux also strengthens the typhoon system with increasing maximum wind speed and significant wave height. The overall impact of atmospherewave coupling makes a positive contribution to the intensification of the idealized typhoon system. The minimum central pressure simulated by the coupled atmospherewave experiment was 16.4 hPa deeper than that of the control run, and the maximum wind speed and significant wave height increased by 31% and 4%, respectively. Meanwhile, within the area beneath the typhoon center, the average total upward airsea heat flux increased by 22%, and the averaged latent heat flux increased more significantly by 31% compared to the uncoupled run.

关键词： wave state sea spray dissipative heating tropical cyclone