Wheat-bug damage in New Zealand wheats: Some properties of a glutenin hydrolysing enzyme in bug-damaged wheat

Some properties of a glutenin hydrolysing enzyme present in bug (Nysius huttoni) damaged wheat (Triticum aestivum) were examined using a modified SDS sedimentation test reported previously. The enzyme appears to be a water-soluble alkaline protease with an activity optimum at pH 9.0. It is relatively heat stable, but the temperature optimum for activity is quite low (35–40°C). The enzyme is not inhibited by EDTA or N-ethylmaleimide, but is inhibited by the metal ions Co²⁺, Mn²⁺ and Fe²⁺.     

椭圆插补原理存在的缺陷

本文主要介绍了现代数控系统中椭圆的插补原理,指出了这种插补原理的缺陷。     

Balancing large systems of national accounts

Systems of national accounts typically contain measurement errors. Official statisticians are prepared to give initial estimates with subjective information on the standard deviations of the measurement errors of these estimates. The systems should satisfy certain accountaing identities, that is, the total incomings into any account should match the total outgoings of the account. A least-squares procedure for the adjustment of large systems of national accounts is proposed, which adjusts the initial estimates so that they satisfy the accounting restrictions. The computational requirements of this adjustment procedure are enormous as the systems of national accounts are frequently very large. Hence, the problem is reformulated and a conjugate gradient algorithm which exploits the constraint sparcity and the specific structure of economic accounting matrices is proposed. The associated computer program is self-contained, relatively cheap, and has been applied to systems of up to 262 accounts.     

ARM+FPGA组成的PLC结构的通信系统

通过自主研制的ARM+FPGA组成的PLC结构通信系统设计的介绍,采用CAN总线实现系统中各模块间的通信功能.在详细分析PLC主机在上电、编辑状态和程序执行时的通信需求与特点的基础上,规范了通信内容达到通信系统的通用性,设计内容主要包括通信协议与通信标识符格式的设计,PLC主机通信软件模块的组成与操作流程,CAN通信发送和接收信息处理任务程序流程的设计等.经试验验证表明:该系统最终可满足PLC主机与各功能模块间不同的通信要求,实现PLC系统实时可靠的通信.     

基于知识图谱的bug问题探索性搜索方法

软件bug问题在软件开发与维护过程中不可避免.然而软件历史库中的bug库与commit库之间没有直接的对应关系,并且随着bug信息、commit提交信息量的增长,搜索bug变得更加繁琐.本文提出一种基于知识图谱对bug问题进行探索性搜索的方法.通过建立bug报告、commit提交信息及相关人员（如：bug报告人、commit提交者等）信息的bug知识图谱,并结合探索性搜索的思想,不仅能准确搜索bug问题,还能提供相关辅助信息对bug问题进行探索性搜索,帮助软件开发人员更有效地理解和解决bug问题.     

持久对象标识的生成方法

在对象持久化过程中,利用对象标识管理器为对象生成唯一标识,并与对象关联被存储在后台关系数据库中,对象标识的引入使维护对象之间关系变得更加容易,便于对持久对象的查询.对象标识管理器的设计,主要是对对象标识生成策略的封装.分析对象标识生成的若干种方法,并对各种方法进行了分析,设计持久层时,可以根据实际需要选择合适的对象标识生成策略.     

基于BP网络的非线性系统无模型误差自学习控制

针对未知非线性系统提出了一种基于BP神经网络的无模型误差自学习控制方案，其控制思想是利用BP网络及其冲量BP算法实现对系统输入输出量的速度辨识，同时构造了误差控制器，并通过速度辨识学习器向误差控制器动态传递更新权阵，以实现对未知非线性系统的自学习、自适应无模型控制。作者在matlab6．0平台下进行了仿真实验，其仿真结果令人满意。     

Algorithmic Debugging and Hypothetical Reasoning

This paper presents a generalization of Shapiro style algorithmic debugging for generalized Horn clause intuitionistic logic. This logic offers hypothetical reasoning and negation is defined not by failure but by inconsistency. We extend Shapiro's notion of intended interpretation, symptoms and errors and give formal results paralleling those known for definite clauses. We also show how a corresponding diagnosis module for RISC- a logic programming system for generalized Horn clause intuitionistic logic-can be defined by meta interpretation. In contrast to Shapiro's PROLOG modules ours work independently of the specific computation rule that in RISC may be specified by the user.     

一种锂电池多模组联合均衡系统的设计

车用动力电池组在充放电循环使用中容易出现一致性恶化的现象,这会导致电池容量衰减甚至引发安全问题。为了解决此问题,文中提出了一种基于CAN网络的锂电池多模组联合均衡系统。该系统能够级联多个均衡器,每个均衡器能够利用充电芯片对电池模组进行主动均衡,同时结合小电阻阵列进行被动均衡,并利用串联在均衡器外部的大功率电阻为电池模组提供快速放电均衡。通过设计有效的控制策略与均衡算法,实现了多个模组联合均衡的目的。仿真和实验对控制策略与均衡算法进行了验证,在实验中,电池组电压极差从均衡前的200 mV缩小为均衡后的20 mV,证明该均衡系统可以有效改善电池组的一致性情况。