引起因素

However, the spatial variability of diversity of annual and biennial herbaceous plants, shrubs, intermediate xerophytes and xerophytes is low.

沙质草场群落中一、二年生草本、灌木、中旱生植物和旱生植物功能群多样性空间变异性较弱，由随机因素引起的异质性所占的比重较大，且主要表现在5 m以下的尺度范围内。

Based on the analysis results, the factors causing the performance variation of the varistors in steady state damp heat test are investigated.

通过对ZnO压敏电阻器试验结果的分析，探讨其在稳态湿热试验中引起性能变化的因素，提出要提高产品的耐湿性能，必须在包封料选择和瓷体制作工艺上加以改进。

In this theme, it is resolved the problem that how to monitor the running status of the semiautomatic grab unloaders The system can discover and forecast the failure in time, avoid the magnitude accidents and enormous economic loss, what is more, we can dig out the hidden troubles from the running status of the equipments and cut down the failure stop time caused by human being.

文章解决了对半自动桥式抓斗卸船机运行状况的监测问题，可以及时发现、预告故障，避免重大事故的发生和巨大的经济损失，而且可以根据卸船机的运行状态找出生产系统中的事故隐患，消除事故隐患，减少由于人为和技术因素引起的故障停机时间。

The distortion of high-strength Aluminum alloy in the process is widespread. And thae residual stress is the key factor that caused distortion.

高强度铝合金在加工过程中的变形问题广泛存在，而残余应力是引起变形的关键因素。

Reveal the characteristics and regular pattern of its epidemic.①Investigated the epidemiological history of 448 clinical confirmed SARS cases, drawing the map of coming places of primary cases and whereabouts of the secondary cases, clarify the reasons of SARS inputting and spreading.②Exploring transmission relationship between cases by drawing the chain-map and learning the main transmission process.③Selecting the chain-cases with the exact onset and contact time to calculating the average incubation of same generation cases on different transmission chains and the average incubation of different generation cases on same transmission chain, Calculating the incubation median, the fifth percentile and the ninety-fifth percentile of the incubation of the observed cases.④Analyzing the timeliness of admission and the treating condition through the statistical calculation of the onset time, the admission time, the hospitalization time as well as the diagnostic time of the suspect and clinical confirmed cases.

调查全省448例SARS临床确诊病例的流行病学史，绘制全省输入SARS原代病例的主要来源以及引起传播后被感染者的去向图，阐明SARS病例的输入与扩散原因；②用传播链图分析传播关系，了解SARS的主要传播过程；③选择SARS原代病例与续发病例接触日期、发病日期明确而完整的传播链病例计算不同传播链同一代之间以及同一传播链不同代之间的平均潜伏期，并计算观察病例潜伏期的中位数以及第5、第95百分位数，确定SARS的最短潜伏期和最长潜伏期；④对患者发病、就诊、住院时间以及医院诊断为SARS可疑病例、临床确诊病例的时间进行统计，分析SARS就诊的及时性以及临床诊治情况；⑤计算不同接触方式、关系密切程度传播SARS的危险度，筛选形成传播的主要危险因素；⑥检测不同人群和同一人群不同时间的SARS血清抗体，了解抗体的阳转时间和持续时间。

We have derived their synodic periods and estimated the shape and orientation of rotational axis for one asteroid. In this thesis, several aspects were involved:(1) Why do we study the asteroids?(2) Based on two classical photometric models of the asteroids, the luminosity variation of the asteroids were introduced.

为了了解小行星的光度这个物理量，在第二章中介绍了两种经典的小行星光度模型，讨论了小行星光度随相位角的变化及冲效应对光度的影响，分析说明了引起小行星光度变化的若干因素。

Through above numerical analysis of the TiN coating/substrate system, some typical rules about the fatigue failure are found:(1) the fatigue damage of a coating/substrate system appears first on the interface, then expands along the interface and to the substrate, and finally causes the coatings broken and spalled;(2) under the cyclic loadings of tangential sliding and radial extrusion, the equivalent plastic damage on the interface is mainly generated by the shear stress and the accumulated plastic contributed by the increments of shear stress. Thus the change of the shear stress is the main factor for the contact fatigue damages of coating/substrate system;(3) the frictional coefficient, external loading and coating thickness have some influence on the carrying capacity and contact fatigue life for a coating/substrate system.

通过对TiN涂层／基体系统的数值模拟分析，得到了涂层／基体系统疲劳失效的一些典型规律：(1)、涂层基体的初始损伤首先出现在交界面处，然后沿界面并向基体中扩展，最后导致涂层断裂而发生剥落失效；(2)、在切向滑动和径向挤压循环载荷作用下，交界面处的塑性损伤主要是由剪应力τ产生，塑性累积也是由于△τ的变化引起，说明循环过程中剪应力变化是影响涂层接触疲劳破坏的主要因素；(3)、材料摩擦系数、外界载荷大小以及涂层厚度都对涂层／基体系统的承载能力以及疲劳寿命都有一定影响。

By analyzing the motive properties of a carrier, this paper sets up a mathematic model for predicting its moving trends, and based on which, the terminal guidance of predicted impact is adopted.

通过分析航母的运动特性，建立了预测其运动态势的数学模型；在此基础上，采用预测落点的末制导方法，在导弹弹头再入大气层后，通过多次预测和修正，实时修正由于航母运动和再入过程中大气影响等各种干扰因素所引起的落点偏差，以保证弹头能以较好的精度命中目标。

Endogenous hormone ABA and GA3 played an important role in seed dormancy and germination. ABA was the key factor for seeds germination, the reduction of ABA was the initiatory factor for embryo development, while the increased GA3 benefited physiological after-ri pening.

内源激素ABA和GA3在滇重楼种子休眠与萌发过程中起着重要作用，ABA是引起休眠的关键因素，ABA含量的降低是滇重楼种胚发育的始动因子，GA3有助于种子的生理后熟。

This thesis is supposed to discuss various influence factors on glass fragmentation and conducts a case analysis on fragmentation of the lighting glass roof and parapets.

文中分析了引起建筑玻璃碎裂的各种影响因素，并对某办公楼采光顶及护栏的玻璃碎裂进行了实例分析。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。