稳定性

The results show that as the crown density reduces the foresttype diversity increases and as the diversity goes up the stability of stand comes down; that the forest is under regressive succession and its stability now is the lowest; that the growth of spruce and fir trees has obviously a n...

结果表明：该林区的林分类型多样性随郁闭度的降低而增加，林分的稳定性随多样性的增加而降低，林分处于逆向演替过程中，林分的稳定性处于最低限；云、冷杉林与环境因子——海拔之间呈明显的负相关；在高海拔区云、冷彬林十分脆弱，一旦原有种群结构的郁闭度低于0.3，森林的稳定性将被破坏，即使在完全封禁的条件下，25年生的疏林要恢复到有林地状态，需要40年的时间。

This thesis comprehensively summarized the dumping stability of the dump truck, investigated the steady-state stability and the dumping stability of the dump truck, and also analyzed significant ground slope, shifting loads, the suspension and the tire of the dump truck on the rollover effects.

论文综述了自卸汽车作业稳定性的研究现状，结合三角臂组合式举升机构的自卸汽车的结构特点，对其静态、作业稳定性以及影响自卸汽车作业稳定性的各种因素进行了分析。

As a kind of important raw material of protein,effects of high intensity pulsed electric fieldson the functional properties of egg albumen were studied.Results showed that solubility of egg albumen decrease when the pulsed electric fields intensity is more than 35 kV/cm.Emulsibility,foam capacity and hydrophobicity of egg albumen increase with the increase...

结果表明：蛋清蛋白的溶解度在脉冲电场强度大于35kV/cm时下降；蛋清蛋白的乳化性、起泡能力、泡沫稳定性及疏水性先随脉冲电场强度增加而增大，但当脉冲电场强度大于30kV/cm后，蛋清蛋白的乳化性、起泡能力、泡沫稳定性及疏水性下降；随着脉冲电场数的增加，蛋清蛋白的溶解度、乳化性、起泡能力、泡沫稳定性及疏水性变化不显著。

The paper relying on project practice of the express highway from Taiyuan to Changzhi of Shanxi Province, according to demanding of "Technical Specifications for Construction of Highway Asphait Pavements ", combining with own region climate characteristic and concrete design, and construction request, it has carried out SBS modified studying on shell-90# asphalt, so drawing a conclusion: 1. Having studied the quantity of SBS modifier"s effect on the temperature sensibility, the high temperature stability, the low temperature resistance to cracking , elasticity and the durability of asphalt ,meanwhile, having studied the quantity of SBS modifier"s effect on the water stability, the high temperature stability , the low temperature resistance to cracking of asphalt mixture, having compared SBS modified bitumens various function. As a result ,when the amount of SBS added is 5%, every function is comparatively even.

本论文依托山西省太—长高速公路建设的工程实践，按照《沥青路面施工技术规范》的要求，结合本地区的气候特点和具体设计、施工要求，对壳牌90#沥青进行了SBS改性研究，得到如下结论：(1)研究了SBS改性剂用量对沥青的温度敏感性、高温稳定性、低温抗裂性、弹性及耐久性的影响，同时研究了改性剂用量对沥青混合料的高温稳定性、低温抗裂性和水稳定性的影响，比较了SBS改性沥青的各项性能，结果表明当SBS掺加量为5%时，各性能较为均衡。

After immobilization, the best pH, temperature and Km of immobilized laccase catalyse ABTS were studied .

固定化漆酶具有较好的热稳定性、贮存稳定性和操作稳定性。

A quasi one-dimensional, time dependent system model based on the parallel compressor theory was used to compute the effect of inlet distortion on turbine engine stability; Through Modifying steady state continuum equation, momentum equation and energy equation, the effect of power extraction and additional bleed on turbine engine running line was computed. Unsteady state continuum equation, momentum equation and energy equation were solved for computing the effect of acceleration on turbine engine running line.

其中，进气畸变对发动机气动稳定性影响的计算采用平行压气机模型，基于李亚普诺夫理论的方法完成；附加引气、功率提取对发动机气动稳定性的影响采用通过对发动机转子间质量、动量、能量守恒方程进行修正的方法进行；加速过程对发动机气动稳定性的影响采用欧拉方法求解动态的质量、动量、能量守恒方程的方法完成；最后采用&层迭&的方法进行各种降稳因素的综合评估。

Three types of polished fault surface are considered:(1) two surfaces contact directly without any gouge in between, used to simulate the friction behavior of brittle fault;(2) the preset fault is filled with 0 25g

提出水的进入降低了系统的稳定性，水的存在增加了系统的稳定性。这是考虑水或一般流体对岩体或断层活动稳定性影响时需要考虑的两个方面

The results show that the flap hinge spring rate has a great effect on helicopter stability and control, but precone and prelag angle,lag hinge spring rate and blade lag motion can be negligible...

分析结果表明：旋翼的预锥角和预掠角对直升机全机的稳定性和操纵性的影响可以略去不计，而桨叶根部挥舞方向上的弹性约束刚度对直升机全机的操纵稳定性有较大影响，摆振方向上的弹性约束刚度和桨叶的摆振运动对直升机稳定性的影响不大，可以略去不计。

Based upon analysis and experiments in the fore part, stabilities of DTC systems are further discussed using Lyapunov theory, zero and pole method of transfer function of AC systems. It is very important that stability of observation for stator flux and current has serious effect for vibration at low speed.

根据前面的分析和实验，结合Lyapnov稳定性原理、系统传函的零极点的方法进一步对DTC系统的稳定性进行分析，认为在低速段状态观测的渐进稳定性是影响系统稳定的主要因素。

In the second chapter, the stabilities of periodic regular gaits for six-legged robots walking longitudinally and laterally were systematically studied respectively, employing a hexpod's geometric model with outward extension of middle legs. Major progress and achievements reached are: a Both the necessary and the sufficient conditions for static walking of hexapods were established theoretically. b A generalized optimization method of gait stability was investigated. c For all feasible duty factor, stability-optimal gaits were obtained, with the expressions being of wide adaptation.

第二章系统分析研究了轴对称六足步行机器人在&中腿行程外置模型&下沿两个运动主方向运动时周期规则步态的稳定性及步态规划问题，主要取得以下三方面新的进展：（1）从理论上建立了六足步行机静态稳定的必要性定理和充分性定理；（2）探索了步态稳定性计算机择优的一般方法；（3）对于所有可能的有荷因数取值，从理论上证明静态稳定性最优步态的存在，并得到具有相当普遍意义的统一表达式。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。