检索结果-南通市图书馆

Zoological Research 2014年第5期35卷 398-403页

作者： Yu-cheng ji Hui ZHUGE Shan-Shan ZHANG shu-Fang ZHANG Xian-Yu Yang College of Animal science and Technology Zhejiang Agricultural and Forestry University Lin 'an 311300 China The Nurturing Station for the State Key Laboratory of Subtropical Silviculture Zhejiang Agricultural and Forestry University Lin'an 311300 China School of Forestry and Biotechnology Zhejiang Agricultural and Forestry University Lin 'an 311300 China

In this study,to clarify the bioactive polypeptides included in the skins and secretions of Bufo,we screened the Japanese toad(Bufo japonicus formosus) skin cDNA library by colony polymerase chain reaction(PCR),and obtained a transcript of 1 075 bp consisting of 1 37 bp 5′ untranslated region(UTR),515 bp 3′ UTR and a 423 bp open reading frame(ORF) encoding a polypeptide of 140 amino acid residues(GenBank accession number: KF359945).Homolog analysis showed a 70%–96% homology with sterol carrier protein-2(SCP-2) present in other animals,which is implicated in lipid metabolism of other *** gene SCP-2 of Chinese toad(***) was cloned from a first strand cDNA of Bufo skin(GenBank accession number: KF381341) via PCR,whose encoding polypeptide has only one amino acid difference from that of Japanese *** distribution analysis showed that SCP-2 expressed in all organs tested,though in the liver and spleen it manifested lower expression than in other *** findings might indicate SCP-2 being one of the active ingredients in toad *** findings may in turn have implications for further drug development from traditional Chinese medicine sources.

关键词： Bufo gavgarizans Bufojaponicusformosus SCP-2 cDNA cloning Tissue expression

Successful management of infected right iliac pseudoaneurysm caused by penetration of migrated inferior vena cava filter:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第30期9卷 9211-9217页

作者： cheng-Xin Weng shu-Min Wang Tie-Hao Wang ji-Chun Zhao Ding Yuan Department of Vascular Surgery West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Indwelling inferior vena cava(IVC)filters might cause various complications,including filter penetration,filter fracture,filter migration,and thrombosis of the *** and migration complications are common,while a caudal migrated double-basket filter with associated infected iliac pseudoaneurysm has seldom been *** SUMMARY We report a 64-year-old female admitted for sudden onset of severe right abdominal pain after IVC filter placement for 3 *** patient had a history of failed endovascular IVC filter *** tomography showed that the retrieval hook of the filter penetrated the right common iliac artery and vein,leading to right iliac artery pseudoaneurysm accompanied by right ureteral obstruction with ipsilateral hydronephrosis,and bilateral iliac veins were *** open repair was performed to remove the IVC filter,the right iliac pseudoaneurysm,and the compromised segments of the iliac veins and IVC with right common iliac artery *** aureus was isolated from the tissue *** patient was discharged on postoperative day 12 with anticoagulation therapy and antibiotic therapy after ***-month follow-up computed tomography revealed that the right common iliac artery was patent,and only mild hydronephrosis was *** An indwelling IVC filter,even‘embedded’within organized thrombus,could still cause life-threatening *** procedures remain the last resort for IVC filters with severe complications.

关键词： Inferior vena cava filter Infected pseudoaneurysm Hydronephrosis Filter migration Open repair Antibiotic therapy Case report

LAMBDA方法中最佳双差模糊度选择问题研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

山东科技大学学报（自然科学版） 2002年第2期21卷 59-61页

作者：韩保民欧吉坤成枢中国科学院测量与地球物理研究所动力大地测量学开放研究实验室湖北武汉430077 山东科技大学地球信息科学与工程学院泰安271019

从双差模糊度的定义出发 ,分析了双差模糊度组合的几种常用方式 ;接着给出了判断模糊度方差协方差阵结构好坏的标准 ;最后用一个实例具体比较了不同双差模糊度组合时模糊度方差协方差阵的相关性及其对模糊度搜索效率的影响。

关键词： LAMBDA方法模糊度方差-协方差阵相关性双差模糊度 GPS 整周模糊度搜索效率

High-throughput experimental tools for the materials genome initiative

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2014年第15期59卷 1652-1661页

作者： ji-cheng Zhao Department of Materials Science and Engineering The Ohio State University State Key Laboratory of Powder Metallurgy Central South University

The materials innovation infrastructure in the materials genome initiative(MGI)consists of three major components:computational tools,experimental tools,and digital *** article will review experimental tools for high-throughput,high spatial resolution measurements of several materials properties such as elastic modulus,thermal conductivity,specific heat capacity,and thermal *** of these tools on compositionvarying samples such as diffusion multiples can be used to quickly and efficiently obtain composition–phase–structure–property relationships for materials property database *** can also be used in conjunction with theoretical modeling to find and explain unusual effects to improve the predictability of *** micron scale resolution experimental tools are in *** high-throughput tools will be an essential part of MGI.

关键词：计算工具材料性能基因组计划高通量实验高空间分辨率属性数据库组成部分

Effect of Halogen Chain End Fidelity on the Synthesis of Poly(methyl methacrylate-b-styrene)by ATRP

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2018年第11期36卷 1217-1224页

作者： Guang-cheng Huang Sheng-Xiang ji Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Chinese Academy of Sciences Beijing 100049China

Poly（methyl methacrylate-b-styrene）（PMMA-b-PS） block copolymers are synthesized by two consecutive ATRPs and fractionated into four fractions. The halogen chain end fidelity （CEF） in PMMA-b-PS is quantified based on the analysis of each fraction. Compared to ethyl 2-phenyl-2-bromoacetate/CuBr/2,2＇-bipyridine （EPBA/CuBr/bpy） and CuBr/N,N,N＇,N＂,N＂-pentamethyldiethylene- triamine （CuBr/PMDETA） catalysts, PMMA-b-PS synthesized using p-toluenesulfonyl chloride/CuCl/bpy （TsC1/CuC1/bpy） and CuC1/PMDETA catalysts has a higher halogen CEF and a better control on molecular weight.

关键词： Atom transfer radical polymerization Chain end fidelity Block copolymer

Infinitesimal dividing modeling method for dual suppliers inventory model with random lead times

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2009年第3期20卷 527-536页

作者： ji Pengcheng Song Shiji Wu cheng Dept. of Automation Tsinghua Univ. Beijing 100084 P. R. China

As one of the basic inventory cost models, the （Q, τ）inventory cost model of dual suppliers with random procurement lead time is mostly formulated by using the concepts of ＂effective lead time＂ and ＂lead time demand＂, which may lead to an imprecise inventory cost. Through the real-time statistic of the inventory quantities, this paper considers the precise （Q, τ） inventory cost model of dual supplier procurement by using an infinitesimal dividing method. The traditional modeling method of the inventory cost for dual supplier procurement includes complex procedures. To reduce the complexity effectively, the presented method investigates the statistics properties in real-time of the inventory quantities with the application of the infinitesimal dividing method. It is proved that the optimal holding and shortage costs of dual supplier procurement are less than those of single supplier procurement respectively. With the assumption that both suppliers have the same distribution of lead times, the convexity of the cost function per unit time is proved. So the optimal solution can be easily obtained by applying the classical convex optimization methods. The numerical examples are given to verify the main conclusions.

关键词： inventory precise model random lead times dual supplier infinitesimal dividing method optimiza- tion.

Background knowledge based privacy metric model for online social networks

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2014年第2期21卷 75-82页

作者： cheng cheng ZHANG Chun-hong ji Yang School of Information and Communication Engineering Beijing University of Posts and Telecommunications

The data of online social network （OSN） is collected currently by the third party for various purposes. One of the problems in such practices is how to measure the privacy breach to assure users. The recent work on OSN privacy is mainly focus on privacy-preserving data publishing. However, the work on privacy metric is not systematic but mainly focus on the traditional datasets. Compared with the traditional datasets, the attribute types in OSN are more diverse and the tuple is relevant to each other. The retweet and comment make the graph character of OSN notably. Furthermore, the open application programming interfaces （APIs） and lower register barrier make OSN open environment, in which the background knowledge is more easily achieved by adversaries. This paper analyzes the background knowledge in OSN and discusses its characteristics in detail. Then a privacy metric model faces OSN background knowledge based on kernel regression is proposed. In particular, this model takes the joint attributes and link knowledge into consideration. The effect of different data distributions is discussed. The real world data set from *** has been adopted. It is demonstrated that the privacy metric algorithm in this article is effective in OSN privacy evaluation. The prediction error is 30% lower than that of the work mentioned above

关键词： privacy metric social network background knowledge kernel regression

Facile measurement of single-crystal elastic constants from polycrystalline samples

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2017年第1期3卷 325-332页

作者： Xinpeng Du ji-cheng Zhao Department of Materials Science and Engineering The Ohio State UniversityColumbusOHUSA

Elastic constants are among the most fundamental properties of *** of microstructural evolution and constitutive/micro-mechanistic modeling of materials properties require elastic constants that are predominately measured from single crystals that are labor intensive to grow.A facile technique is developed to measure elastic constants from polycrystalline *** technique is based upon measurements of the surface acoustic wave velocities with the help of a polydimethylsiloxane film grating that is placed on a polished surface of a polycrystalline sample to confine surface acoustic waves that are induced by a femtosecond laser and measured using pump-probe time-domain *** backscatter diffraction is employed to measure the crystallographic orientation along which the surface acoustic wave propagates in each grain(perpendicular to the polydimethylsiloxane grating).Such measurements are performed on several grains.A robust mathematical solution was developed to compute the surface acoustic wave velocity along any crystallographic orientation of any crystal structure with given elastic constants and *** inputting various starting values of elastic constants to compute the surface acoustic wave velocities to match experimental measurements in several distinct crystallographic orientations using an optimization algorithm,accurate elastic constant values have been obtained from seven polycrystalline metal samples to be within 6.8% of single-crystal *** new technique can help change the current scenario that experimentally measured elastic constants are available for only about 1% of the estimated 160,000 distinct solid compounds,not to mention the significant need for elastic constants of various solid solution compositions that are the base of structural materials.

关键词： materials. density. constants

The Optimal Preconditioner of Strictly Diagonally Dominant Z-matrix

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2008年第2期24卷 305-312页

作者： ji-cheng Li Wei Li Department of Mathematics Xi'an Jiaotong University Xi'an 710049 China

In this paper, we present a series of new preconditioners with parameters of strictly diagonally dominant Z-matrix, which contain properly two kinds of known preconditioners as special cases. Moreover, we prove the monotonicity of spectral radiuses of iterative matrices with respect to the parameters and some comparison theorems. The results obtained show that the bigger the parameter k is（i.e., we select the more upper right diagonal elements to be the preconditioner）, the less the spectral radius of iterative matrix is. A numerical example generated randomly is provided to illustrate the theoretical results.

关键词： Preconditioned method iteration splitting linear system

Autism and Mental Retardation of Young Children in China

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2005年第5期18卷 334-340页

作者： XIN ZHANG cheng-YE ji Institute of Child and Adolescent Health Peking University Health Science Center No.38 Xueyuan Road Haidian District Beijing 100083 China Department of Child and Adolescent Health Public Health School lianjin Medical University lianjin 300070 China

To understand the prevalence and rehabilitation status of autism and mental retardation in China. Methods Screening test and clinical assessment were conducted for the diagnosis of autism and mental retardation. The assessment included investigation of the histories of medical conditions and development of these two disorders, utilization and needs for the rehabilitation service, and related intellectual and behavioral appraisal. Results Among the 7345 children investigated, the prevalence of autism disorder was 1.10 cases per 1000 children aged 2-6 years （95% CI=0.34 to 2.54）, and the prevalence of mental retardation was 10.76 cases per 1000 children （95% CI=8.40 to 13.12）. All the children suffering from autistic disorder were intellectually disabled, whereas 31.0% of the non-autism mental retardates had other disabilities. The medical conditions prior to birth and perinatal period were important potential factors for autism. Half of the autistic children and 84% of the children with non-autism mental retardation had never received any rehabilitative service. Conclusions The prevalence of autistic disorder in children aged 2-6 years in Tianjin is rather high. It is urgent to improve the status of the autistic and intelligently disabled young children in China. In order to upgrade the level of early diagnostic and improve the intervention to autism and mental retardation, public awareness and training courses should be heightened.

关键词： Autism Mental retardation Epidemiology China