甘蓝型油菜雌性不育突变体FS1花器官形态结构研究

植物界中雌性不育现象普遍存在，迄今已在小麦、水稻、苎麻、油松、桔柑等作物中发现了雌性不育突变体^[1~5]，并对雌性不育的机理、遗传、应用进行了研究^[6~11]。1996年我们在油菜育种圃甘蓝型黄籽油菜宁油10号株系中发现了3株异常株，每株只结几个角果，角果肥大且角粒数只有1~5个，后来研究证实为雌性不育突变体，定名为FS1。雌性不育系作父本与母本混播，应用于杂交油菜制种可缩小父、母本间传粉距离，增加母本播种量，从而提高制种产量和纯度。初步研究表明，FS1天然授粉、套袋自交、剥蕾自交结角率为3%左右，平均每角粒数为1.30-2.07粒，其雌性不育性可以遗传，花粉育性正常，体细胞染色体数正常，为2n=38，花粉母细胞减数分裂正常（有关研究另文报道）。为了解甘蓝型油菜雌性不育突变体FS1的雌性不育机制，本文从形态结构方面做了初步研究。     

Respond of Stock Trading Volume to Earning Report

Earning report is a main accounting report that transmits earning information to users. It is the core of financial reports system. Earning information is significant to users' decision making. This paper studies the respond of stock trading volume to earning report and draws the curve of trading volume before and after earning report. This paper further does a regression analysis of accidental earning and abnormal return rate, and draws the relation curve of them on the earning report date to prove stock trading volume does have remarkable respond to earning report. This research is significant to either lessen small investors blindness investment and help them make reasonable forecast to markets and regulate the disclosure of listed companies.     

Existence of an Arbitrage about Portfolio in an Unequilibrium Market

This article has discussed the problem of an arbitrage about an portfolio in an unequilimarket and got a determinable theorem about existence of an arbitrage about an portfolio. According to this theorem,an arbitrage about portfolio is not existing if there exists a respect martignal measure.A structural result about existence of arbitrage about an portfolio in a market is gotten. All results represent the existence of an arbitrage about an portfolio is related closely to the type of market.     

Application of Slicing in Component-based System Regression Testing

In component-based system regression testing, the dependence model of component-based system should be built in order to confirm the part which will be affected by modify. Since high reusability and high complexity, the existing dependence models may not be applicable to component-based systems, a hierarchical dependence model is proposed to describe component-based. Through the forward slicing of modified points in the model, the modified and affected parts can be gotten, then traverse these parts and get affected testing path, thereby regression testing examples can be chosen effectively, the efficiency of regression testing can be improred.     

Design of Data Acquisition System for Vehicle Based on CAN Bus

To the question that a meter is correspond with a set of lead and a sensor,this paper presents a design of data acquisition system for vehicle based on CAN bus.In this way,the combinatorial instrument is only connected by a bus unit.Author introduces the data acquisition structure chart and the CAN interface,analyzes the software by program flow chart,and shows it's application for vehicle virtual instrument.A method of calculating vehicle speed,engine rotate speed and the course of development mileage are also given.     

Requirement Model Based on UML 2.0 for Equipment MIS

This paper introduces the modeling of Unified Modeling Language with use case diagram and active diagram based on Rational Unified Process for Equipment Managemet Information System. It discusses the modeling mechanism and character of UML and develops the Computer Equipment management Information System Based Web using Rational Rose of UML CASE Tool. First, it is describe the authors how to analyze the structure of organize and build the model of structure organize. Second, they abstract the workflow of main operation in organize and build workflow model by active diagram. Finally, they abstract actor, use case with case diagram and finish the requirement model.     

The Algorithm of Searching out the Least and Most Loops by Making Use of Direction Factor

Based upon the conception of the least loop,the most loop and direction factor presented by the author firstly,the algorithm of searching out the least and most loops has been designed.By building the adjoining matrix, confirming the start-point of searching,vectorizing the searching sides,calculating the direction factor of adjoining sides,we can search out the next side of the least loop or the most loop rapidly.With a valid searching side being confirmed at every searching and the searching scope being reduced by forming degenerate graph,the time compexity of the algorithm is much less. In the research of the automatic calculating system of construction quantities, the problem of houses partition and out-wall partition had been solved succesfully by utilizing this searching algorithm.     

基于FD技术改善低比速离心泵叶

简要介绍低比速离心泵特点，阐述计算的控制方程和叶轮通道网格划分方法。运用商业CFD软件FLUENT对不同叶片形式叶轮流道进行三维湍流流动计算。 计算采用压强连接的隐式修正SIMPLEC算法和雷诺平均法的RNG κ-ε湍流模型。根据计算结果分析叶片形式对流速分布、压力分布的影响，揭示叶轮内流动规律， 提高低比速离心泵优化设计的水平。