基于误差剔除和数据挖掘的人工气候室测试系统

人工气候室中的参数测试存在着测量误差大和重复性差的缺点,严重影响测试结果的准确性.针对这个问题,研究了集温度、湿度、光照度、CO2含量等参数测试为一体的人工气候实验室智能测试专家系统,详细介绍了该系统所采用的基于格罗贝斯准则的疏失误差剔除方法以及数据挖掘方法.经实际应用验证,该系统消除了人工气候室参数测量的不确定性,可获得比传统的算术平均值更准确的测试结果,并能依据各参数间的关联关系对测试的手段和方法进行有效的调整.     

CET—4词语用法测试要点分析

本文对历年来ＣＥＴ－４中Ｖｏｃａｂｕｌａｒｙ 题项进行研究，通过列举分析，主要归结了词语 用法测试的常见类型及特点，对教学和测试有一定裨益     

Automatic Testing Method Based on All Duality Algorithms

What is the most important in automatic testing is automatically generating test cases and then filter them,which involve parameters' combination and filter.The authors do an argumentation by using all duality algorithms to(imply) the generating and automatically filter,and then assume an automatic testing way,prove the feasibility of this way with an instance.An additional basic testing shows that the algorithm is satisfactory.     

传动件试验台加载系统述评

介绍了开式试验台、电封闭试验台和机械传动封闭试验台的加载原理,并对其性能及应用选型进行了分析。     

Study on Functional Testing State Sets for 32-bit Microprocessors

Based on the functional fault model of instruction decoding in microprocessors,this paper Slyes the properties of the tasting state set should have for any type of instructions and presents the method to construct such testing state sets.     

3种阔叶树种子生活力四唑法测定研究

本文对山玉兰、厚朴、黄山栾树这3种阔叶树种子生活力四唑测定法进行了研究,探讨各种种子适宜的预处理方法和四唑溶液浓度.结果表明:除黄山栾树种子外,另外2种种子需要全部去除种皮;在25℃测定条件下,测定山玉兰和厚朴种子生活力的最佳处理浓度为0.5%的四唑,黄山栾树用0.1%浓度的四唑;在种子生活力测定时,低质量的种子容易加大实验误差,并对所采用四唑溶液的浓度和种子预处理方法产生影响.     

三种草花种子寄藏真菌检测与鉴定

采用平皿培养方法分别对三种草花共计9个品种的种子样品进行了种子寄藏真菌检测和纯化、鉴定.结果表明,一串红两个品种的种子样品寄藏真菌带菌率最高,分别达到72.5%和54.0%,万寿菊三个品种的种子样品寄藏真菌带菌率分别为11.5%、13.0%和11.5%,矮牵牛四个品种的种子样品带菌率在17.0%～50.5%之间变化.三种草花种子寄藏真菌共有9种类型,根据其形态特征鉴定为链格孢菌(Alternaria alternata、A.tenuissina、A.tenuissima)、毛壳菌(Chaetomium sp.)、青霉属(Penicillium sp.),编号为B、C、G、H的四种分离物的分类地位待定.研究结果表明,链格孢菌是一串红、万寿菊和矮牵牛三种草花种子寄藏真菌的优势菌群.     

Efficiency of early generation testing in pickling cucumber

Summary Early testing was evaluated for efficiency as a procedure for selecting among lines for yield (total and marketable fruit number), earliness and fruit quality (shape, color and seedcell size) in 24 sets of lines developed at random from a pickling cucumber (Cucumis sativus L.) population. The advantage of early testing was calculated using the regression of S₆ on S₁ performance. The amount of effort required in worker-hours and the theoretical gain from selection were also considered in estimating the advantage of early testing. Early testing for specific combining ability and for general combining ability was up to 2.05 times as efficient as late testing for total yield, and up to 2.29 times as efficient as late testing for earliness. Early testing was not efficient for selection for the fruit quality traits measured, nor for inbred performance per se.     

Comparison of Progeny-Testing Methods in Lolium perenne L.

From 22 genotypes, selfed (S₁) and testcross progenies were investigated. The latter were generated by i) polycross (PX) and ii) 2 topcrosscs (TC) using cms-inbred lines as a tester. Progenies were tested for annual dry matter yield in 3 successive years, the 3-year average was 76.7 dt/ha for S, and 76.9, 80.1 and 74.5 for PX, TC 1 and TC 2, respectively. Genetic variance was highest for S₁ (20.42), while the average of the 3 tcstcrosses was 12.22. However, the genotype-year interaction variance of S, Was 52.21, being 2–3 times greater than for the 2 topcrosscs. PX progenies were the most stable across years. Predicted response to selection was highest for S₁ (10.4 %). Genetic correlation (r_g) between S₁ and the testcrosses was highest with TC 2 (r_g= 0.5931⁴⁴).