人工淹水逆境处理对美洲黑杨苗生理特性的影响

本文主要从下述三方面对美洲黑杨16个无性系苗在人工淹水处理后，其生理特性的变化进行了初步研究：1、人工淹水深度对无性系苗生理特性的影响；2、人工淹水持续时间长短对无性系苗生理特性的影响；3、不同无性系苗在遭受淹水胁迫后生理特性的变化，被测定的生理指标包括可变荧光Fv、叶扩散阻力re(S.cm^-2)、蒸腾强度Tr(ugH2O.cm^-2.S^-1)和叶水势Ψ（Bar)。研究结果表明，人工淹水深度与持续时间长短对16个美洲黑杨无性系苗的生理特性有明显的影响。     

枝径与叶面积协调生长关系的比较研究

应用多元统计分析方法对同树种同一个体、不同个体、不同树种等的不同龄枝、不同类型枝的枝基断面参数与叶面积间的协调生长关系进行研究。结果表明，被测树种同一个体枝基横断面积参数较直径参数与叶面积呈现更显著的协调生长关系，这种协调关系在2至多年生枝中较当年枝表现更为显著。在分枝水平(即各级分枝层次)上这种协调性是以个体为单位体现的，受环境影响较大，不同个体不尽一致；在树干(整株)水平(即树干断面参数和总叶面积层次)上表现为种内不同个体间差异不大。     

Forest Bio-disaster Status and its Basic Research in China

This review outlines the characteristics and developmental trends of forest bio-disasters (including disease, insect and rodent pests) of recent years in China, summarizes the achievements of the basic researches supported by the National Natural Science Foundation of China, defines the main drawbacks, and proposes some important issues to be highlighted in the basic research in the future in order to integrate research resources, concentrate research objectives and to accelerate the development of forest bio-disaster basic research in China.     

手足口病型传染病的数学模型

将传染病流行区内的人群分成5类,根据人群之间的变化机制,应用动力学方法建立了含有潜伏期且在潜伏期、发病期和病愈期内均具有传染性的手足口病型传染病的数学模型.并在建立模型的基础上,讨论了手足口病模型的平衡点和稳定性,同时得出了阈值定理.     

滚动轴承防锈方法研究

分析了影响滚动轴承锈蚀的因素及几种常见的锈蚀现象 ,探讨了在生产加工和保管使用过程中防止滚动轴承锈蚀的方法。     

LOD score exclusion analyses for candidate disease susceptibility genes using case-parents design

The focus of almost all the association studies of candidate genes is to test for their importance. We recently developed a LOD score approach that can be used to test against the importance of candidate genes for complex diseases and quantitative traits in random samples. As a complementary method to regular association analyses, our LOD score approach is powerful but still affected by the population admixture, though it is more conservative. To control the confounding effect of population heterogeneity, we develop here a LOD score exclusion analysis using case?parents design, the basic design of the transmission disequilibrium test (TDT) approach that is immune to population admixture. In the analysis, specific genetic effects and inheritance models at candidate genes can be analyzed and if a LOD score is ≤-2.0, the locus can be excluded from having an effect larger than that specified. Simulations show that this approach has reasonable power to exclude a candidate gene having small genetic effects if it is not a disease susceptibility locus (DSL) with sample size often employed in TDT studies. Similar to association analyses with the TDT in nuclear families, our exclusion analyses are generally not affected by population admixture. The exclusion analyses may be implemented to rule out candidate genes with no or minor genetic effects as supplemental analyses for the TDT. The utility of the approach is illustrated with an application to test the importance of vitamin D receptor (VDR) gene underlying the differential risk to osteoporosis.     

实现冠心病普查系统GISCAD的进化模型

一般说来,专家系统的开发是一个知识获取的过程。本文首先介绍了我们开发的一个冠心病普查系统,并讨论了知识获取和系统进化等问题,说明了用于开发冠心病普查系统的进化模型。     

中老年人身心健康与体育锻炼

研究体育运动对中老年人身心健康的作用，认为中老年人通过经常参加体育锻炼，可提高呼吸系统、血液循环系统及神经系统的机能，增强体质，提高健康水平及新陈代谢能力，延续衰老过程，延长寿命。     

四川省邛崃市土鸭寄生虫病初步调查

临床剖检土鸭20只，通过体外及体内寄生虫检查，发现体外感染为阴性，体内寄生虫病中吸虫感染率较高，其中纤细背孔吸虫最高(45％)，感染强度大(3～57条)。并发现食道粘膜的毛细线虫卵感染率甚高(65％)，针对这些情况进行了分析，认为与本地的自然环境有着密切关系，从而为养殖户防治疾病提供依据。     

用系统工程的方法指导治疗多种慢性病的实践

在对患者进行病症系统分析和治疗方案选优的基础上,利用系统工程的理论和方法指导对罹患慢性疾病的病人进行了综合施治收到了显著效果