DNA芯片技术应用研究进展

DNA芯片技术是近年迅速发展的一门生物高新技术 ,其突出特点在于高度并行性、多样性 ,即能一次性对生物遗传信息进行大规模的快速、同步分析。DNA芯片技术目前已用于基因重复测序、基因表达分析、新基因的发现、基因单核苷酸多态性 ( SNPs)研究、基因诊断、药物筛选等领域 ,而且其应用范围还在不断扩展。本室运用这一新技术 ,检测水稻在受水稻黄单胞菌水稻致病变种及该菌株的 rpf C基因缺失突变体感染时基因表达的差异 ,发现一些基因可能与水稻抗白叶枯病相关     

Study on Single-chip Computer Control Systems in Miniature Water Works

In order to enhance automation and to design low price and performance reliable control systems for the miniature water works, the single-chip computer control system was adopted to control the work. The single chip computer control system in the miniature water works, the principle of the hardware and a part of software block diagram were discussed in this paper. Finally, the data acquisition and control network were introduced.     

Genetic advance for chip colour in potatoes

Summary The objective of this study was to investigate the response to selection for chip colour after harvest (CH), storage at 12.8°C (CR) and at 3°C (CC) in three hybrid populations. Population 1 was derived from crossing ND860-2 (cold chipper) with F58089 (regular chipper), Population 2 was obtained from crossing ND860-2 with Russette (nonchipper), and Population 3 was derived from crossing Russette with F58089. Eighty-five to ninety-six random clones for each population plus ten check cultivars were planted in 1991 at two locations in East Canada. For CH, Population 3 had the highest predicted gain. No genetic variation for this trait was detected in Population 1. The potential genetic advance by selection within Population 1, as measured by the predicted mean of the selected clones, however, was similar to the others because Population 1 has a higher mean. For CR, Populations 2 and 3 had similar expected response estimates. Population 1 had no genetic variation for CR but showed similar potential advance to Population 2 and higher than Population 3. For CC, Population 2 had the highest predicted gain. The predicted means of selected clones of Populations 1 and 2 were higher than that of Population 3. Consequently, Populations 1 and 2 had greater potential for improvement for CC than Population 3.     

电磁调速异步电动机控制器

本文阐述一种电磁调速异步电动机控制器的控制线路设计、工作原理及其工作特点。     

基于SPCE061A的地面障碍避让定位控制系统

就植苗过程中对植苗点地面障碍物的自动检测进行了研究,开发了一套自动避让测控系统。为此,从系统设计、软硬件设计和系统抗干扰方面进行了论述。该系统以SPCE061A型16位单片机为核心控制器,同时使用8位单片机89C2051为下位机协同工作。系统在模拟环境下工作正常稳定,可以实现预期功能,但仍需要进一步改进以适应野外工作。     

基于AT89S51的蔬菜大棚温控系统设计

以AT89S51单片机为控制核心,以数字温度传感器DS18B20为测温元件,采集温室内的温度信息。通过对当前温室环境的现状进行分析,对温室温度参数进行调节,以达到栽培作物生长发育的需要,为作物的生长提供最适宜的温度环境,大幅提高作物的产量和质量。     

旋耕刀传感器及微机测试系统的研究：Ⅱ.微机测试系统设计

设计了一种旋耕刀微机测试系统，它以Ｉｎｔｅｒｌ８０９８单片计算机为核心，可现场进行数据的采集，监测，存储和处理，采用自校正，断电保护等技术，提高了测试精度和抗干扰能力。     

热量计中的温升测量与单片机控制

高精度测量温升是热量计智能化的主要问题。本文叙述了石英晶体用于测温的优点,对国产5MC测温晶体与国外测温晶体进行了对比实验与分析,给出了可供实用的石英晶体测温和单片机控制的恒温式热量计的硬件框图与软件流程。     

群钻钻削力研究─—群钻钻削的流屑角模型（Ⅰ）

本文在文献［１］的基础上，将切屑在前刀面上的运动形式分解为侧卷运动和上卷运动．根据分运动速度的方向和大小，从理论上建立并完善了群钻钻削的流屑角模型，为群钻钻削力预测模型的建立奠定了基础．     

电容法测试刨花含水率的研究

研究了基于电容原理测定刨花含水率的方法.试验表明:在一定含水率范围内,刨花含水率与其电容值成一定函数关系,当5%≤MC＜25%时,含水率与电容值成指数关系;当25%≤MC＜150%时则成线性关系.同时,被测物的堆积面积、堆积厚度等对测量结果有一定影响,需加以修正.