检索结果-南通市图书馆

Molecular identification, expression and function analysis of peroxidasin in Chilo suppressalis

Insect Science 2020年第6期27卷 1173-1185页

作者： Chun-Ping Ma zi-mu guo Feng-Li Zhang Jian-Ya Su Key Laboratory of Integrated Management of Crop Diseases and Pests(Ministry of Education) College of Plant ProtectionNanjing Agricultural UniversityNanjingChina

Peroxidasin plays a unique role in the formation and stability of extracellular matrix(ECM)in the animal kingdom;however,it was only characterized in Diptera,not in other insect *** this study peroxidasin(CsPxc/)was first identified and characterized from Chilo suppressalis,a lepidopteran *** complementary DNA with a 4080 bp open reading frame encodes a peptide of 1359 amino acids;the derived amino acid sequence of CsPxd harbors the typical structural characteristics of peroxidasin family in heme-peroxidase superfamily,including the signal peptide at N-terminal,leucine-rich repeat domain,Ig-loop motifs and peroxidase domain,signifying the extracellular location of protein and the involvement in ECM *** expression reveals CsPxd protein displays peroxidase activity on H2O2,justifying the membership of *** analysis shows the monophyletic evolution pattern of peroxidasin in insect phyle,and moreover only one peroxidasin is present in each species of insects,suggesting its evolutionary conservation on *** messenger RNA is mainly expressed in egg and the final instar larvae *** of peroxidasin double-stranded RNA into the final instar larvae impacts the cuticle sclerotization during the metamorphosis from larvae to pupa,and eventually lead to lethality of larvae and *** results suggest the presence of collagen crosslink in chorion and cuticle of insects,and indicate peroxidasin plays a role in the development of chorion and cuticle;furthermore peroxidasin might be the one of potential target genes for pest control using RNA interference.

关键词： Chilo suppressalis cuticle sclerotization peroxidase peroxidasin RNA interference

来源：

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

不同界面形状及结构的涂层残余热应力的有限元分析

引用

兵器材料科学与工程 2008年第2期31卷 70-74页

作者：尚晶马冰张倩牟治国中国兵器科学研究院宁波分院浙江宁波315103

为了提高大厚度耐磨涂层的结合强度,运用 ANSYS 软件对不同界面形状及结构的耐磨涂层中残余热应力进行有限元分析。分析表明:界面形状为齿形的涂层比界面形状为平面的涂层残余热应力值略大,但不存在局部的应力集中且应力分布较均匀;随... 详细信息

为了提高大厚度耐磨涂层的结合强度,运用 ANSYS 软件对不同界面形状及结构的耐磨涂层中残余热应力进行有限元分析。分析表明:界面形状为齿形的涂层比界面形状为平面的涂层残余热应力值略大,但不存在局部的应力集中且应力分布较均匀;随着过渡层的增加,涂层热膨胀系数过渡越好,残余热应力越小。同时应用盲孔法获得残余应力实际值,用CMT4105型微机电子万能试验机测试涂层与基材的剪切结合强度,验证应力分布的正确性。

关键词：耐磨涂层残余热应力界面形状涂层结构 ANSYS有限元分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A semi-analytical method to compute acoustic nonlinearity parameter of Cu,Ag and Au

引用

Rare Metals 2023年第3期42卷 1050-1055页

作者： zi-mu Chen Zheng Zhang School of Materials Science and Engineering Beihang UniversityBeijing 100191China

In this paper,a semi-analytical method was proposed to evaluate the acoustic nonlinearity parameter for single crystals of Cu,Ag and *** acoustic nonlinearity parameter can be derived analytically by general expressions in terms of the interatomic potentials with the distances between each pair of atoms in these transition *** evaluate the acoustic nonlinearity parameter,one needs to conduct one step molecular static simulation and obtain the equilibrium positions of all the ***,based on this method,numerical experiments with molecular dynamic code LAMMPS were given to compute the acoustic nonlinearity parameter of Cu,Ag and *** illustrate the validity of these expressions,comparison was made between calculation results and data in the *** agreement is *** of the analytical nature of this method,it provides a fundamental understanding of the nonlinear elastic behavior of these transition metals.

关键词： Nondestructive testing Semi-analytical Acoustic nonlinearity parameter Molecular static simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

服务器无感知计算系统性能优化技术研究综述

引用

软件学报 2025年第1期36卷 47-78页

作者：杨光刘杰曲慕子王帅叶丹钟华中国科学院大学中国科学院软件研究所软件工程技术研究开发中心计算机科学国家重点实验室(中国科学院软件研究所)

服务器无感知计算是新兴的云计算模式,它基于“函数即服务(FaaS)”的范式,以函数为部署和调度的基本单位,为用户提供大规模并行和自动伸缩的函数执行服务,且无需用户管理底层资源.对于用户,服务器无感知计算能够帮助他们摆脱集群底层基... 详细信息

服务器无感知计算是新兴的云计算模式,它基于“函数即服务(FaaS)”的范式,以函数为部署和调度的基本单位,为用户提供大规模并行和自动伸缩的函数执行服务,且无需用户管理底层资源.对于用户,服务器无感知计算能够帮助他们摆脱集群底层基础设施管理的负担,专注于业务层的开发和创新;对于服务提供商,服务器无感知计算将应用分解为细粒度的函数,极大地提高了调度效率和资源利用率.显著的优势让服务器无感知计算迅速吸引了业界的注意,然而,服务器无感知计算与传统云计算迥然不同的计算模式以及对任务各方面的严格限制给应用的迁移带来了诸多障碍,各种越来越复杂的任务也对服务器无感知计算的性能提出了越来越高的要求,服务器无感知计算的性能优化成为一个重要的研究课题.从4个方面对服务器无感知计算系统性能优化技术的相关研究工作进行梳理和综述,并介绍现有的系统实现.(1)介绍面向典型任务的优化技术,包括任务适配和针对特定任务的系统优化;(2)综述沙箱环境的优化工作,包括沙箱方案和冷启动优化技术,它们是决定函数运行速度的核心;(3)概括I/O和通信技术的优化,它们是服务器无感知计算应用程序的主要性能瓶颈;(4)简述相关的资源调度技术,包括面向平台和面向用户的调度策略,它们决定着系统的资源利用率和任务的执行效率.最后,总结当前服务器无感知计算性能优化技术所面临的问题和挑战,并展望未来可能的发展方向.

关键词：服务器无感知计算函数即服务云函数云计算性能优化

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Cloning and characterization of the gene encoding an ubiquitin-activating enzyme E1 domain-containing protein of silkworm, Bombyx moil

引用

Insect Science 2010年第2期17卷 75-83页

作者： Ping Wu mu-Wang Li Yun-Feng Jiang zi-Sheng Wang Xi-Jie guo Sericultural Research Institute Chinese Academy of Agricultural Sciences College of Biotechnology and Environmental Engineering Jiangsu University of Science and Technology Zhenjiang Jiangsu Province China

Bombyx mori cytoplasmic polyhedrosis virus （BmCPV） is one of the major viral pathogens for the silkworm. To date, the molecular mechanism of BmCPV invasion has been unclear. We cloned the full length complementary （c）DNA which encodes the ubiquitin-activating enzyme El-domain containing proteinl （UbE1DC1） ofBombyx mori by using suppression subtraefive hybridization （SSH） and rapid amplification of com- plementary （c）DNA ends （RACE）. The full-length eDNA of UbE1DClgene is 1 919 bp, consisting of a 100 bp 5＇ untranslated region, a 637 bp 3＇ untranslated region and an 1 182 bp open reading frame （ORF）, encoding a 393 amino acid protein. The protein contained the THiF_MoeB_hesA_family domain, an adenosine triphosphate binding site, which belongs to the family of ubiquitin-activating enzyme El. Reverse transcription - polymerase chain reaction analysis from the silkworm tissues, namely silk gland, hemo- cyte, fat body, gonad and midgut revealed that UbE1DC1 was expressed in all the five tissues. The real-time quantitative polymerase chain reaction analysis indicated that the relative expression of UbE1DC1 in the normal midgut was approximately 9.78-fold of that in the BmCPV-infected midgut. It is implicated that UbEIDCI may play an important role in the interaction between the host and BmCPV invasion.

关键词： Bombyx mori Cytoplasmic polyhedrosis virus midgut quantitative real-time PCR rapid amplification of eDNA ends suppression subtractive hybridization

来源：

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

Experimental study on the relation between the water content of surface soil and the acoustic wave

引用

Acta Seismologica Sinica(English Edition) 2001年第5期14卷 571-576页

作者： guo zi-qi 1. Institute of Remote Sensing Application Chinese Academy of Sciences 100101 Beijing China 2. Institute of Geophysics China Seismological Bureau 100081 Beijing China

In order to investigate the relation between the water content changing of surface soil and micro-quake recorded before earthquakes, we carried out a simulation experiment in laboratory. Its purpose is to explore whether the acoustic wave generated by micro-fracturing before earthquake are able to change water content of surface soil, so as to understand the relation between thermal anomaly in the remote sensing image got from the seismogenic area and the coming earthquake. The result of the experiment shows that when the acoustic wave enters into the surface soil the water content here increases on the background of decreasing due to natural evaporation. In the meantime, temperature here decreases.

关键词： acoustic wave remote sensing water content in soil micro-fracturing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

TOWARDS A THEORY OF GAME-BASED NON-EQUILIBRIUM CONTROL SYSTEMS

引用

Journal of Systems Science & Complexity 2012年第2期25卷 209-226页

作者： Yifen mu Lei guo Institute of Systems Science Academy of Mathematics and Systems ScienceChinese Academy of Sciences

This paper considers optimization problems for a new kind of control systems based on non-equilibrium dynamic *** be precise,the authors consider the infinitely repeated games between a human and a machine based on the generic 2×2 game with fixed machine strategy of finite k-step *** introducing and analyzing the state transfer graphes(STG),it will be shown that the system state will become periodic after finite steps under the optimal strategy that maximizes the human’s averaged payoff,which helps us to ease the task of finding the optimal strategy considerably. Moreover,the question whether the optimizer will win or lose is investigated and some interesting phenomena are found,e.g.,for the standard Prisoner’s Dilemma game,the human will not lose to the machine while optimizing her own averaged payoff when k = 1;however,when k≥2,she may indeed lose if she focuses on optimizing her own payoff only The robustness of the optimal strategy and identification problem are also *** appears that both the framework and the results are beyond those in the classical control theory and the traditional game theory.

关键词： Heterogeneous players non-equilibrium dynamical games optimization state transfer graph win-loss criterion.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

引用

Science China Chemistry 2025年第01期 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-Cheng Tang Ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu Tang Chun-Mao Yuan Jun-Bo Yang Zhi-Li Zuo Han guo zi-Fei Xu Ying Zeng Yun-Dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

关键词：

来源：

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cardioneuroablation for the treatment of symptomatic bradycardia mediated by the cardiac autonomic nervous

引用

Journal of Geriatric Cardiology 2023年第9期20卷 615-617页

作者： zi-Liang SONG mu QIN Xu LIU Department of Cardiology Shanghai Chest HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina

Sinus bradycardia is a common clinical problem with a population prevalence of approximately 4/1000.[1]Most patients are asymptomatic,but some patients experience symptoms such as fatigue,dizziness,exercise intolerance,syncope,or pre-syncope,worsening of angina symptoms,worsening of heart failure,or cognitive *** both European and American guidelines recommend cardiac pacing for patients with severe symptoms of sinus bradycardia,there are problems such as infection,electrode detachment,perforation,and pacemaker replacement.

关键词： cardiac cardia angina

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

How cooperation arises from rational players?

引用

Science China(Information Sciences) 2013年第11期56卷 247-255页

作者： mu YiFen guo Lei Institute of Systems Science Academy of Mathematics and Systems ScienceChinese Academy of Sciences

In classical control systems,the plant to be controlled does not have intention to gain its payof or benefit,which is obviously not the case in various aspects of social and economic systems(or subsystems).In the latter case,competition and cooperation between players who will optimize their own payofs turn out to be an important feature,and a fundamental problem is how to achieve cooperation from these rational *** this paper,we present a neat way to lead to cooperation in dynamical Prisoner’s Dilemma *** our scenario,the two players are heterogenous with hierarchical roles as the‘leader’and the‘follower’*** is shown that the system will co-evolve into and stay at the cooperation state if and only if the leader is restricted not to take the dominating *** the special case of 1-step-memory,the optimal strategies for the leader and follower are‘Tit for Tat’and‘ALL C’*** this framework,both the heterogeneity of the players’roles and the multiplicity of time-scales are crucial for cooperation,which are quite natural settings from the view point of control ***,the boundary for cooperation also turns out to depend on the relative payofs of the players.

关键词： cooperation Prisoner’s Dilemma leader-follower game finite-memory strategy optimization

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：