Software release management for component‐based software

Software release management is the process through which software is made available to and obtained by its users. Until now, this process has been relatively straightforward. However, the emergence of component‐based software is complicating software release management. Increasingly, software is constructed via the assembly of pre‐existing, independently produced, and independently released components. Both developers and users of such software are affected by these complications. Developers need to accurately document the complex and changing dependencies among the components constituting the software. Users must be involved in locating, retrieving, and assembling components in order to appropriately bring the software into their particular environment. In this paper, we introduce the problem of release management for component‐based software and discuss SRM, a prototype software release management tool we have developed that supports both developers and users in the software release management process. Copyright © 2002 John Wiley & Sons, Ltd.     

On aspectualizing component models

Server‐side component models such as Enterprise JavaBeans (EJB) add powerful abstractions to the bare ‘business objects’ layer in order to support a clean separation of server‐side application logic from other concerns such as distribution, security, transaction management and persistence. An improved separation of concerns is also the main goal of aspect‐oriented programming (AOP). This paper compares the two approaches and reasons about the possibility of substituting (parts of) component models using AOP mechanisms. We conclude that AOP is a promising approach to eliminate important shortcomings of the container‐based component approach. However, our analysis of concrete aspect‐oriented languages shows that current AOP technology is not yet mature enough to supersede component models. Copyright © 2003 John Wiley & Sons, Ltd.     

基于模型代数的DSS建模与实现方法研究

对DSS模型代数在实际系统中的建模方法进行研究,并结合一个实际应用系统介绍DSS模型代数的应用。在应用系统中采用Java技术对DSS模型之间的各种通信方式编程,充分体现了DSS模型代数的实用性。所形成的设计模式可以有效地应用到具体的DSS系统的开发中。     

Position estimation using principal components of range data

This paper describes a new approach to mobile robot position estimation, based on principal component analysis of laser range data. An eigenspace is constructed from the principal components of a large number of range data sets. The structure of an environment, as seen by a range sensor, is represented as a family of surfaces in this space. Subsequent range data sets from the environment project as a point in this space. Associating this point to the family of surfaces gives a set of candidate positions and orientations (poses) for the sensor. These candidate poses correspond to positions and orientations in the environment which have similar range profiles. A Kalman filter can be used to select the most likely candidate pose based on coherence with small movements.

The first part of this paper describes how a relatively small number of depth profiles of an environment can be used to generate a complete eigenspace. This space is used to build a representation of the range scan profiles obtained from a regular grid of positions and orientations (poses). This representation has the form of a family of surface (a manifold). This representation converts the problem of associating a range profile to possible positions and orientations into a table lookup. As a side benefit, the method provides a simple means to detect obstacles in a range profile. The final section of the paper reviews the use of estimation theory to determine the correct pose hypothesis by tracking.     

Peculiarities of dominant mode transformation in rectangular T-septum waveguide with inhomogeneous dielectric loading

A combined 2D numerical-analytical algorithm for electromagnetic (EM) fields computation in one-counter waveguides with arbitrary cross section is proposed. The developed algorithm is employed to investigate the influence of the normalized propagation constant and dielectric loading on the field distribution in a rectangular T-septum waveguide with an E-plane dielectric insert. Dominant-mode varieties of a given transmission line are represented. © 2004 Wiley Periodicals, Inc. Int J RF and Microwave CAE 14, 201–205, 2004.     

基于信息熵与现场数据的汽车零部件可靠性计算

采用信息熵建立了基于现场数据的汽车零部件可靠性计算方法,并通过VB编程实现.分析了传统方法的苛刻要求及计算的不精确.讨论了信息熵计算标准差的方法、正态分布可靠度的计算方法、等效正态变换的方法.结论为:本方法可以克服传统方法的苛刻要求;本方法的计算结果更接近真实值;将强度对数正态分布转换为等效正态分布,具有广泛的普遍性.     

无线遥控液压爬行机器人的设计

无线遥控液压爬行机器人是一种用于大型构件滑移安装的新型施工装备.该机器人由爬行器、液压动力系统、传感检测和计算机无线遥控系统组成,通过自锁机构夹紧轨道形成反力推动构件.爬行器和液压系统采用了模块化设计,无线遥控通信设备采用了蓝牙数据收发器.机器人能应用于大型构件整体同步连续滑移的无线遥控作业,并且推力与速度可测可控.     

多重实时荧光定量聚合酶链式反应在芝麻酱掺假鉴别中的应用

目的 基于分子生物学技术,研究建立多重实时荧光定量聚合酶链式反应(Polymerase Chain Reaction,PCR)技术检测芝麻酱中的植物源性成分,实现芝麻酱的快速掺假鉴别,突破单标准单物种检测的局限性。方法 该研究以芝麻2S albumim mRNA基因、花生Ara b2基因、大豆Lectin基因、玉米adh1基因设计特异性引物和探针,优化反应体系,建立多重实时荧光定量PCR技术检测芝麻酱中的芝麻源性成分、花生源性成分、大豆源性成分、玉米源性成分,并应用于市售的芝麻酱样本检测分析。结果 该方法高效低成本,特异性好,对小米、绿豆等10种非目标源性成分无特异性扩增;对芝麻源性成分、花生源性成分、大豆源性成分、玉米源性成分的最低检出限为100 pg/μL,具有较高的灵敏度;应用建立的方法,对市售21份芝麻酱样本进行检测分析,检测结果与标签标注不符合的有4份,标签标注符合率80.95%,与参比方法检测结果一致。结论 建立的多重实时荧光定量PCR技术对加工成品的检测具有较好的适用性,为芝麻酱的掺假鉴别提供了一种新的分子生物学方法。     

河南省市售鱼虾蟹类及其制品营养成分调查分析

目的 分析河南省市售及加工鱼虾蟹类食品的营养成分,完善河南省特色食物成分数据库。方法 2017年12月—2020年12月对饭店和超市内售卖的鱼蟹类食品采样,分析其中的水分、灰分、蛋白质、脂肪、碳水化合物、总氮、糖类、多种维生素及人体必需的矿物质等营养成分。结果 水分、灰分含量水平基本一致;除油炸食品外均未检出糖类;蟹类能量含量整体偏高,炸鱼能量、蛋白质、总氮和脂肪整体高于鲜鱼;鱼虾蟹类脂肪酸的总量不高,不饱和脂肪酸比例大,二十碳五烯酸（EPA）和二十二碳六烯酸（DHA）占主要成分,DHA含量较高的依次是鱿鱼0.209 g/100 g、龙虾0.181 g/100 g和巴沙鱼0.153 g/100 g,EPA依次是蟹黄1.07 g/100 g、小黄鱼0.38 g/100 g和鲫鱼0.297 g/100 g;鱼类全部检出氨基酸,虾蟹类90%检出,蟹类中蟹黄氨基酸含量较高。结论 鱼虾蟹类制品中,调味料及食用油对食物成分有影响;鲜品中不饱和脂肪酸的含量与总脂肪酸含量正相关,鱼类和蟹类单不饱和脂肪酸高,虾类与推荐比例一致。     

基于差分激光三角法的薄零件厚度测量研究

为了精确自动测量薄零件的厚度,设计了一种基于差分激光三角法的厚度测量系统。利用双路激光对称布置,由两个CCD接收上下光路的反射/散射光斑,实现薄零件的厚度自动测量。采用平行直线双线性查表法标定测量系统,进行了标定实验和厚度测量实验。多次实验表明,系统的标准差均小于0.009。