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Based on the scalar scattering theory,a mathematical model of the light scattering intensity distribution of laser beam on the back focal plane of Fourier lens by a rough surface is established by means of the probabilistic-statistical method.

本文以标量散射理论为基础，用概率统计方法建立了粗糙表面的光散射强度在傅氏透镜后焦面上的分布的理论模型，采用镜反射方向的光强与某一散射方向的光强之比来计算R_q值的方法，导出了理论计算公式。

In this paper, we study nonlinear perturbation analysis of mesoscale verticalcirculation and evolution equation by means of f plane, non-hydrostatic balance andfilter model. Outstanding nonlinear characteristic of mesoscale disturbance invertical direction, we obtain nonlinear symmetric disturbance equation anddisturbance amplitude s evolution equation by use of multi-scale and singularperturbation technique.

中文摘要：本文采用f平面、非静力平衡、滤声波模式，讨论了大气中尺度非线性动力学方程，通过尺度分析重点突出了扰动在垂直方向上的非线性特征，从而得到了对称扰动非线性方程，运用多重尺度方法和摄动分析讨论了对称扰动非线性重力惯性波的演化过程，得到非线性重力惯性波振幅演化服从广义的非线性Schrdinger方程。

The output sequences of these two chaotic systems are composed by using a special method, and a fast image encryption is realized by means of the bit-wise xor operations.

对该系统进行数值实验和安全性分析，结果表明该系统不但拥有大的密钥空间，而且对密钥和明文很敏感，具有优良的扩散性能和扰乱性能，并能抵抗已知明文攻击和选择明文攻击。

The effect of temperature on the friction and wear performances of multi-fibers reinforced automotive brake is investigated using XD-MSM tester. The mechanism of friction and wear is analyzed by observing the surfaces of friction material worn at different temperatures by means of scanning electron microscope.

利用XD-MSM型定速摩擦试验机，考察了摩擦材料的摩擦系数和磨损率随温度变化的情况，并且通过扫描电镜观察了摩擦材料在不同温度下磨损后的表面形貌，分析其摩擦磨损机理。

Focusing on this practical engineering problem and by researching on some relative enterprises, this article intends to describe the dust generation mechanism, diffusion rules, control technology of dust by means of theoretical analysis and numerical simulation in coal washery, and put forward a comprehensive plan of dust control which takes bag filter as main dust removal equipment, and make an optimal design of air delivery and positioning, to realize the optimal control of dust.

针对这一工程实际问题，通过对相关企业的调研，本研究对选煤厂中粉尘产生机理、扩散规律及控制技术进行理论分析和数值模拟；并提出以除尘器为主要设备的粉尘治理综合方案，并对其风量、安装位置等工艺参数进行工程设计，以实现对粉尘的最优化控制。

Establishing the atherosclerotic model of rabbits by feeding them with cholesterol, we measured their body weight, TC, TG and LDL. Drawing the materials from rabbit aortic wall and embedding them with paraffin to make into section preparation, we detected type Ⅰ collagen, NF-κB, VCAM-1, CD36, type Ⅰ collagen mRNA and NF-κB mRNA with immunohistochemistry and in situ hybridization technique and by means of color image analyzer .

通过高脂饲料建立兔AS模型，测定体重及血脂成分的改变；取其主动脉壁，石蜡包埋制成切片，采用HE、免疫组化及原位杂交法染色，光镜观察AS病变，并应用CMIAS真彩色医学图像分析系统，检测Ⅰ型胶原mRNA及其蛋白、NF-κBmRNA及其蛋白、VCAM-1及CD36蛋白表达定量A值，与对照组进行比较。

The application of steel bar threaded connection technology among bridge construction;2. The problem of gas leakage caused by the hose falling out is solved by means of threaded connection of a specified length bellows to the hotplate.

在居民用户室内燃气工程中采用不锈钢波纹管，安装L型灶前台式阀，通过波纹定尺管与灶具螺纹连接，解决了胶管脱落引发燃气泄漏的问题。

The transverse bar of the carriage contains ways on which the cross slide is mounted and can be moved by means of a feed screw that is controlled by a small handwheel and a graduated dial.

大拖板上有横向导轨，使横向拖板可以安装在上面，并通过丝杠使其运动，丝杠由一个小手柄和刻度盘控制。

Combined with the construction of the Magong Bridge in Changzhou City, the prestress technique by means of the support displacement method to avoid cracks in floor deck concrete caused by tensile stress is studied.

本文 结合常州市马公桥工程的建设，对采用支座位移法来施加预应力，避免桥面混凝土开裂的技术进行了研究。

The main cause of corrosion case of heat exchange tubes for a heater of nature gas by hot water jacket was studied by means of water quality examination, scanning electron microscope, X-ray photoelectron spectroscope and X-ray diffraction analysis.

用水质分析和腐蚀产物的XRD、XPS、SEM分析等方法及密闭系统静态挂片实验，研究了加热炉腐蚀的主要原因和机理。

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％。