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The key to this yield criterion is that the concept of internal friction angle which used in soil mechanics has been introduced to infer the relationships among poisson ratio, internal friction angle and relative density.

并且在Miss屈服准则的基础上论证了粉末体屈服准则在主应力空间，为一个回转椭球体。

The exact path points on the TIN are computed according to the property that two intersecting lines' in-angle is equal to out-angle.

然后根据相交直线进入角度和离开角度相等的性质将距离对应的路径变换回三角网格上。

Based on the analysis of the influence to the testing result induced by the roller parameters, such as the diameter, attachment coefficient and locating angle, the thesis proves that, through construction of a mechanics model of the rig to calculate the biggest braking forcing which can be detected, the detectible braking force has a direct ratio with the roller attachment coefficient and a inverse ratio with the cosine of the locating angle.

在分析了汽车滚筒反力式制动检验台的滚筒直径、滚筒的附着系数及安置角对检测结果影响的基础上，通过建立力学模型计算汽车滚筒反力式制动检验台所能检测到的最大汽车制动力得出结论：汽车滚筒反力式制动检验台所能检测到的制动力与滚筒的附着系数成正比，与安置角的余弦成反比。

Objective : To evaluate the clinical efficacy of Nd:YAG laser iridectomy for primary angle-closure glaucoma and angle-closure glaucoma secondary to uveitis.

目的 评价NA：YAG激光虹膜切除术治疗原发性闭角型青光眼和葡萄膜炎继发青光眼的临床疗效。

Methods : 219 eyes of 192 patients with primary angle-closure glaucoma and 9 cases with angle-closure glaucoma secondary to uveitis were treated by NA: YAG laser iridectomy, and the clinical effects were then retrospectively analyzed.

回顾分析192例219眼原发性闭角型青光眼和9例葡萄膜炎继发青光眼，接受NA：YAG激光虹膜切除术后的临床效果，随诊16～46月。

Although 25 eyes presented with acute angle closure glaucoma, 6 eyes were insidious onset and asymptomatic. While 27 eyes relieved pupillary block after laser iridotomy or surgical peripheral iridectomy, 4 eyes required vitrectomy or laser photomydriasis to relieve pupillary block. Five eyes (16%) developed chronic angle closure glaucoma due to peripheral anterior synechia. one could be controlled by chronic medical therapy, three required trabeculectomy, the another one even required cyclocryotherapy because poor IOP control after trabeculectomy.

虽然大多数的病例（25只眼）以急性发作为临床表徵，但有6只眼为隐袭性，无任何临床症状。27只眼经雷射虹彩瞳孔术或外科周边虹彩切除术后可以解除瞳孔阻塞，另4只眼无法解除而需作玻璃体切除术或雷射光瞳孔放大术。5只眼(16%)因周边前黏连发生慢性隅角闭锁性青光眼，其中1只眼可以药物控制，3只眼需做小梁切除术，另1只眼做小梁切除术后眼压仍无法控制而接受睫状体冷冻治疗。

Analyzing the isobar distribution under the flight condition of zero attack angle and ±5°attack angle when inlet starts and unstarts,the unstart of inlet can be concluded.

通过对不同攻角飞行条件下起动和不起动时压力分布的分析，得到进气道不起动的结论。

I could verify that all three of them have got about 8.5 degrees of real angle, which yields an apparent angle of 60 degrees for the DF and the BPO, and a pretty wide 68 degrees for the Kronos.

我能证实所有这三款镜子的真实视角都是8.5度，表现视场DF和BPO是60度，Kronos是68度。

This thesis mainly discuss following issues, Theory and simple expressions for array covariance matrixes are derived when angular spread functions are symmetric distribution functions, i. e. the Uniform distribution, the Gauss distribution, the Laplace distribution and the Von Mises distribution, and a non-symmetric distribution function, i. e. the Gamma distribution. And the relation between the effective signal subspace and the array number, or and the nominal angle of the distributed source, the angular spread, the distributed functions, and the Signal-to-Noise Ratio is gained. The dimension of the effective signal subspace increases with increment of the array number. And it is more obvious to the non-symmetric distribution. The dimension of the effective signal subspace decreases with increment of the nominal angle. And the distributed source is equal to a point source as θ=π/2. The dimension of the effective signal subspace increases with increment of the angular spread.

本论文针对阵列信号处理中广泛存在的分布源现象，主要讨论了以下问题：推导了角度分布函数分别为对称的均匀分布、高斯分布、拉普拉斯分布、Von Mises分布和非对称的伽马分布时，分布源阵列接收信号协方差阵的严格模型和简化模型，得到了单个分布源的有效信号子空间随阵元数、分布源中心角、分布角、角度分布函数和信噪比的变化规律：随着阵元数的增加，对所有角度分布函数的有效信号子空间维数也随着增加，且非对称分布函数的有效信号子空间充满整个空间的可能性更大；随着分布源中心角逐步增加，有效信号子空间维数逐步减小，当θ=π/2时，等价于点源情形；随着分布源分布角逐渐加大，有效信号子空间维数也随之增加，直到有效信号子空间充满整个空间；随着信噪比的增加，有效信号子空间维数有一定程度的减少。

So the main study contents of this thesis are as follows: the load distribution pattern along the length beam and the cross beam in the place of node、 the appropriate matching rigidity of the length and cross beams in the action of same anchorage force and the affection pattern discuss on sloping surfaces dip angle、 beam rigidity 、 anchor-rope angle as well as the position of load which affect the load distribution ratio on length and cross beams. In the end it brings forward lattice beam internal force calculated method on the basis of double parameter groundsill model.

鉴于此，本文主要的研究内容是格构梁节点处荷载沿纵横梁的分配规律、同一锚固力作用下纵横梁合理的匹配刚度以及对格构梁纵横梁荷载分配比值可能存在影响的坡面倾角、梁刚度、锚索夹角、加载位置等因素的影响规律探讨，最后提出基于双参数地基模型的格构梁内力计算方法。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。