差

The aberration properties of optical systems with large tilted and decentered plane-parallel refractive plate system and wedge system were analyzed with a new primary aberration analysis method for non-coaxial optical systems,i.e.vector aberration theory.

运用一种新的分析偏心和倾斜光学系统初级像差特性的方法-矢量像差理论，分析了具有较大交叉倾斜角的平行平板光学系统和具有较大倾斜角的光楔光学系统的像差特性。

Case between wheel should be used at the same time. Firstly jointed the lock of Diff. case between axis, secondly jointed the lock of Diff.

如果路况恶劣，需将轴间和轮间差速锁同时使用时，应先接合轴间差速锁，再接合轮间差速锁。

If the positive density difference is larger, both the blending volume of displacement fluid and displaced fluid is larger.

对于流体在管内的顶替流动，正密度顶替时，密度差越大，顶替液和被顶替液的掺混量越大；负密度差顶替时掺混量比正密度差顶替小。

In our approach, a two-block message is still needed to produce a collision, the first block being only one MSB different while the second block remains the same.

本文所提出的1-MSB输入差分碰撞技术中，仍然采用两个消息分组，但其中第一个分组仅第九个消息字的最高位需要差分，而第二个消息分组可无需差分，即第二个消息分组碰撞是一个伪碰撞（Pseudo-collision）。

Second, according to the characteristic of soft-ground ,when we disposed of the obser-vation data of every period from the earth subsidence network, we chose three adjustment ma-thematics models including adjustment by classics; adjustment by free network and adjustment by selecting proposal stable points to deal with the solution .

其次根据软土地基的特点，为达到观测成果能合理处理目的，在沉降变形监测网数据处理时，利用了三种平差数学模型即经典平差、自由网平差和拟稳平差分别进行观测基准网的解算，并把求算结果进行比较对照，从而选出最合理的能符合本场地实际条件的一组解算成果作为我们后面的变形成果精度分析的依据。

The main conclusion have:(1)Whole self-esteem of the student in Gannan medical college at self-liking Mean=25.8216, Std.d= 5.23375, self-competence Mean=22.8908, Std.d= 4.17661.The average level with Qian-Ming Yi often the mold compares with other researchers as a result is low.

主要结论有：(1)我院学生整体自尊平均分为48.6551，标准差8.19851，在自我喜欢维度上平均分为25.7337，标准差5.03438，在自我能力感维度上平均分为22.9214，标准差4.17778，与钱铭怡的常模和其它研究者结果相比水平偏低。

The correlation between independent variables and demographic data revealed a positive correlation between self —efficacy of prevent and management EIA and behavior of prevent and management EIA. There was a negative correlation between physical activities and gender, age and beginning age of asthma.

三预防及处理行为得分与预防及处理行为自我效能得分呈正相关；身体活动得分与性别、年龄及气喘开始年龄呈负相关；EIA预防及处理行为自我效能得分与目前有使用气管扩张剂呈正相关；EIA认知得分差与EIA处理行为自我效能得分差及身体活动得分差呈正相关。

After the deduction of high order temporal and special difference approximation to the wave equation, the snapshots of wave propagation in an infinite monoclinic media and synthetic three components surface and VSP data for a flat layered model are presented.

推导了交错网格中时间和空间上的高阶差分近似公式，并针对二维单斜各向异性介质，给出了具体的空间差分网格的形式。在上述理论的基础上，利用交错网格高阶有限差分技术，首次对单斜各向异性介质中波的传播特性进行了模拟。

Do you have strategies for BD as well as strategies for product differentiation If not, analyze your customers' behavioural expectations and develop a market strategy for differentiating yourself behaviourally.

你们是否向拥有产品差异化战略一样具有行为差异化策略？如果没有，分析你的顾客行为预期，开发一个行为差异化市场战略。

Throughout comparing the above estimating methods, we have the following results: the estimators of the moments of the errors does not depend on the random effects, and that of the random effects does not depend on the errors, and then the corresponding asymptotic variances are very simple and optimal; when the random effects are multivariate, we can not construct different estimating equations for the random effects and errors respectively, which results that the asymptotic covariances of estimation are very complex and then the estimating efficiency is bad.

比较上述两种估计法，我们发现：当随机效应是一维的时侯，误差的各阶矩的估计不依赖不可观测的随机效应，随机效应的估计也不依赖误差，因此，估计的渐近方差结构特别简单也是最优的；而当随机效应是多维的，因为随机效应的协变量的影响，我们没有办法针对随机效应和误差的各阶矩分别建立估计方程，这导致所得的估计的渐近方差或者协方差矩阵特别复杂，从而估计的效果不是很好。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。