特征指标

In the light of field features in desertification areas, the data quality and band combination of different bands are assessed, the indicators, principles and methods for data assessment and band option are put forward to, and optional band combination for desertification monitoring is determined primarily. The data pre-treatment model for desertification monitoring is developed after studying the pre-treatment algorithm of restoration and rebuilding of hyperspectral resolution data. The spectral features and variation rules of different objects in experimental areas are understood and analyzed. The different classified methods are given and discussed on the basis of characteristics of desertification region. The remote sensing quantitative retrieval model for the appraisable factors of desertification monitoring are founded.

针对荒漠化地区的地物特征，对高光谱数据不同波段的数据质量、波段组合进行定性和定量的评价，提出用于数据评价、波段选择的指标、原则和方法；初步确定一个适用于荒漠化监测的优化波段组合，建立适合于荒漠化监测的数据预处理模式；初步分析、掌握研究区内各类地物的光谱特性及变异规律；针对荒漠化地区特点对多种分类方法进行探讨分析；建立荒漠化监测主要评价因子的定量反演模型。

In order to study the relation of digestive tract and circumstances in Eothenomys miletus, weights and length et al of stomach, small intestine, large intestine, caecum were measured in their nature environment.

为探讨栖息于横断山地区大绒鼠的消化道特征与环境之间的适应关系，对自然环境中大绒鼠消化道各项指标进行了测定。

The existence characteristic, structure transformation and the characteristic of water before and after adding nanometer particles will be measured, the variety of nanometer particles and causable environment effect will be studied.

测定投加纳米颗粒物前后纳米颗粒物的存在特征、结构变化和水体理化指标，研究纳米颗粒物在水中的变化及引起的环境效应。

The main findings of the study are as follows:(1) Both N2 and P3 are the characteristic ERPs under nogo inhibition,but P3 amplitude is a good indicator of inhibition processing depth;(2) Through ERP waveforms separation from encoding of stimuli sequence,we verify that the capacity of visual working memory is about 4 units;(3) In the go/nogo sequence response, encoding is mainly the function of right hemisphere, but inhibition retrieval is concentrated on left frontal area and anterior cingulated cortex.

本研究获得了以下结论：(1)在nogo抑制条件下，N2和P3波是特征的抑制波，但P3的波幅是反应抑制加工深度的良好指标；(2)对刺激的顺序编码加工的ERP验证了工作记忆的处理单元的容量为4左右；(3)在Go/nogo序列反应中，编码加工体现为右脑优势，而抑制提取的加工负波集中在左脑前额和前角回区。

Demographical character and life style factors were investigated for all subjects , and their ...

对所有选定的研究对象进行人口统计学特征及生活方式相关因素的调查，同时进行血压、身高、体重、腰围和臀围的测量；采集研究对象血标本，进行血脂、血糖、肺炎衣原体IgG抗体、肺炎支原体IgG抗体、幽门螺旋杆菌IgG抗体和柯萨奇病毒IgG抗体等指标的检测。

In chapter Ⅰ, a historial review of structure control is given; In chapter Ⅱ, A discussion of the controllability and observablity of flexible structures is given, Two kinds of controllability and observablity index are defined, and applied to actuator allocation; chapter Ⅲ considers the reduction of high order flexible structure mode; the content of chapter Ⅳ is about the basic problem of distributed parameter control system design. It is proved that a stable controllor in mode space may be unstable in real use in distributed paramater systems, also, by closed loop mode concept, a pole assignment method of flexible structure controllor design is given; chapter Ⅴ is about the low-authority controllor design, it is pointed out by use of high order eigenvalue/eigenvector perturbation, a better controllor can be designed; chapter Ⅳ considers flexible structure reduced order control; chapter Ⅶ disscusses the basic problem of flexible structure computer control, analyses discreate controllablity and observablity and its computing, the sample period and coefficient wordlength; chapter Ⅷ is on the problem of low flexibility compensation; chapter Ⅸ is a design example.

在第一章简要回顾了挠性结构控制的历史，并且指出控制中的一些问题；第二章讨论了挠性结构的能控性与能观性，定义了两类能控性程度和能观性程度指标，还将能控性程度概念应用于执行器位置的确定；第三章论述了高阶模型的降价问题，比较了适于挠性结构模型降阶的方法，指出其适用范围；第四章内容是分布参数系统设计的基本问题，首先证明在模态空间中设计的稳定的控制器在实际分布系统上可能是不稳定的，进而根据闭环模态的概念，获得挠性结构控制器设计的极点配置方法；第五章的内容是关于低权控制器的设计问题，指出利用特征值高价摄动和特征向量的摄动，可以设计出更加完善的低权控制器；第六章讨论挠性结构降阶控制问题；第七章讨论挠性结构计算机控制的基本问题，分析了时间离散化模型的能控性和能观性及其计算问题，讨论了采样周期选择和系数字长问题；第八章讨论低挠性结构的补偿问题；第九章的设计例子用来说明第二章和第四章的结果。

Firstly, it introduced the import principium resolving thread and steps of analytic hierarchy process. Secondly, it erected model of population modernization, which based on the steps of analytic hierarchy process. Lastly, it got the maximal eigenvalue of dissymmetric matrix and corresponding eigenvector with SAS, and normalized the eigenvector to get weight value.

本章分为两部分，第一部介绍分析法的提出、原理以及解决问题的思路和步骤；第二部建立模型确定权重，根据层次分析法的原理和步骤，建立人口现代化指标体系的模型，运用SAS求解所构造的非对称判断矩阵的最大特征值，从而得出所对应的特征向量，变形后得到权重。

Based on a rather long temporal series of remote sensing data, employing RS and GIS as its tool and FVC that is of rather high sensitivity over the coverage of vegetation in arid area as its monitoring index of desertification, the dissertation analyzes the features of the dynamitic variation of desertification in Xinjiang over the years by using the slop variation to reflect the features of temporal-spatial distributing and the changes of areas of the desertification in Xinjiang.

以较长时间序列的遥感数据为基础，以RS和GIS为工具，选择了在干旱区对植被覆盖度上有较好敏感性的FVC的斜率作为荒漠化监测指标，利用1982~2000年期间新疆FVC斜率变化来反演新疆土地荒漠化的时空分布、面积变化，分析新疆荒漠化多年来动态变化特征； 3。

We characterized left ventricular volume, effective arterial elastance, left ventricular end-systolic elastance, and leftcommunity.

我们应用非侵入性检查手段在社区正常射血分数心力衰竭患者以及对照组中检查具有特征性的左心室容积，有效的动脉弹性回缩率，左心室收缩末期弹性回缩率和左心室舒张期弹性回缩率以及舒张功能等指标）。

The soil erodibilities are compared and appraised for the majority of the soil types in Ningxia. The method published by D. W. Fryrear et al is adopted to calculate erodible fractions for the soils in Ningxia. The erodibilities of main soil types are compared and analyzed. Spatial distribution of soil erodibilities in the region can be perceived on the Map of Ningxia Soil Erodibility. The map is based on the digitized map of soil types of the all region by means of the geographical information system of Region Manager. Evaluation results show that erodible soils occupy a large portion of the total area of the region.(3) The third task is evaluation of effects of human activities for farming on soil erodibility. Tillage and cultivation can alter soil properties. The paper, based on the discussion on the characteristics of farmland suffering wind erosion in the region, analyzes the contents and intensities of farming disturbing surface soil. Emphasis is paid on the effect of farming on erodibilities of each type of soil.

W Fryrear等人的计算土壤可蚀部分含量的方程，此方程的自变量包括土壤有机质、碳酸钙、沙粒含量、沙粘比，计算了宁夏主要土壤类型表层的可蚀含量，进而比较它们的可蚀性，并以宁夏土壤分布图为底图用地理信息系统建立了宁夏土壤风蚀数据库，完成了宁夏土壤可蚀性图，评价结果显示宁夏地区主要的土壤类型较容易遭受风蚀；（3）农业经营对土壤风蚀的影响及其评价，在分析宁夏农业土壤遭受风蚀特征的基础上，首先讨论了农业活动对土壤理化性质的干扰，评价主要耕作栽培措施对土壤风蚀的影响，选取粗糙度、表面结皮、可蚀颗粒含量、留茬和有效时间为指标，用打分方法作了评价。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐