滇Ⅰ型粳稻不育系原种提纯技术研究

采用单株选择(不育系和保持系花粉镜检)、成对回交、株系鉴定、混系繁殖,辅以在开花期去除不育系中异杂株的方法提纯滇Ⅰ型不育系;经田间种植鉴定,原种纯度达99.90%以上;缩短了种子生产年限,减少繁殖代数,有效地保持了不育系原有的配合力和典型性状。达到“起点高、防杂严、数量大、程序简”的目的。     

农药混用联合作用检验方法新探——死亡概率法

本文以农药的毒力回归曲线为基础,研究了农药混剂中各单剂间的毒力相关指数对药效的影响,归纳整理出用死亡概率计算混毒系数对混剂联合作用进行检验的新方法。     

计算机考试软件中实现Word文档评分的3种方法

提出计算机考试软件中对MicrosoftWord操作产生的DOC文档评分的3种实现方法:(1)扫描和解析另存的HTML文档,从中获取DOC文档内容和版面信息;(2)在Delphi平台上通过OLE构件对象访问DOC文档中各种对象的信息;(3)在VisualBasic平台上通过OfficeVBA获取DOC文档中各种对象的信息.同时给出了相应的算法描述和程序片段,并对3种方法进行比较.     

小型西瓜果实成熟度表征因子筛选

为了判断小型西瓜生长过程中的成熟度,实时监控其内部品质,该文研究了小型西瓜"京秀"果实在生长过程中,多种基础信息随着生长天数的变化情况。西瓜的内部品质指标变化具有一定的规律性,且部分指标的变化规律相似。由相关性分析、因子分析及构造新变量的结果可知,小型西瓜"京秀"果实在授粉后20～38d的过程中,品质变化主要表现为可溶性固形物、可滴定酸、瓜瓤含水率及叶绿素含量的变化,其中叶绿素含量的变化主要在22～25d的过程中表现较为显著,28～30d的过程中主要表现为可溶性固形物、可滴定酸和含水率的变化,31～38d的过程中品质基本上已经达到稳定,只在小范围内有些波动。研究结果为小型西瓜品质和成熟度的光学无损检测提供了参数选择的依据。     

Use of key feature questions in summative assessment of veterinary medicine students

Purpose

To prove the hypothesis that procedural knowledge might be tested using Key Feature (KF) questions in written exams, the University of Veterinary Medicine Hannover Foundation (TiHo) pioneered this format in summative assessment of veterinary medicine students. Exams in veterinary medicine are either tested orally, practically, in written form or digitally in written form. The only question formats which were previously used in the written e-exams were Type A Single-choice Questions, Image Analysis and Short Answer Questions. E-exams are held at the TiHo using the electronic exam system Q [kju:] by CODIPLAN GmbH.

Methods

In order to examine less factual knowledge and more procedural knowledge and thus the decision-making skills of the students, a new question format was integrated into the exam regulations by the TiHo and some examiner used this for the first time in the computer based assessment. Following a successful pilot phase in formative e-exams for students, KF questions were also introduced in summative exams. A number of multiple choice questions were replaced by KF questions in four computer based assessment in veterinary medicine. The subjects were internal medicine, surgery, reproductive medicine and dairy science.

Results

The integration and linking of KF questions into the computer based assessment system Q [kju:] went without any complications. The new question format was well received both by the students and the teaching staff who formulated the questions.

Conclusion

The hypothesis could be proven that Key Feature questions represent a practicable addition to the existing e-exam question formats for testing procedural knowledge. The number of KF questions will be therefore further increased in examinations in veterinary medicine at the TiHo.     

关于兽药产品批准文号分级分类审批管理的思考

从管理法规、工作程序、审批情况等方面总结了兽药产品批准文号管理现状,从4个方面分析了工作中存在的突出问题并提出了解决对策,建议对兽药产品批准文号实行分级分类审批管理,将部分兽药产品批准文号审批权下放地方政府,提出了具体的实现路径,并测算了预期工作量,以期为推进兽药管理行政审批制度改革提供参考.     

农药登记网上申报审批情况及存在问题浅析

我国农药行政审批服务系统自2010年6月1日上线运行至今,已有三年的时间。本文对三年来我国农药登记网上审批进展情况进行了相关数据的汇总统计,并对网上申报审批工作存在的问题进行了简要的分析。