微系统

For polydisperse systems at large Péclet number, we establish the systems of differential equations describing the leading term and the second term of the pairdistribution function via regular perturbation method.

针对高Péclet数情形，通过正则扰动法我们建立了决定对分布函数的微扰展开的主导项和一阶项的联立方程组，并用由此算出的对分布函数的数值解计算了系统的沉降系数。

The system is reduced to an EulerPoinsot motion perturbed by a small periodic excitation.

利用动量矩变量列写动力学方程，并将系统化作受周期微扰作用下的Euler-Poinsot运动。

7 To 3.3 V operating supply voltage 44.1 kHz sampling frequency 16.9344 MHz (384fs) system clock Built-in crystal oscillator circuit 16-bit, MSB rst, rear-packed serial data input format ( 64 fs bit clock) 8-times oversampling digital lter · 32 dB stopband attenuation ·+0.05 to -0.05 dB passband ripple Deemphasis lter operation · 36 dB stopband attenuation ·-0.09 to +0.23 dB deviation from ideal deem- phasis lter characteristics Attenuator · 7-bit attenuator (128 steps) set by microcontrol- ler Soft mute function set by parallel setting ·(approximately 1024/fs total muting time) Mono setting · Left or right channel mono selectable by micro- controller Built-in innity-zero detection circuit , two-channel D/A converter · 3rd-order noise shaper · 32fs oversampling Built-in 3rd-order post-converter low-pass lters 24-pin VSOP package Molybdenum-gate CMOS process

2.7至3.3 V工作电源电压为44.1千赫的采样频率16.9344兆赫（384fs）系统时钟内置晶体振荡器电路的16位，MSB在前，后包装的串行数据输入格式（64飞秒位时钟）8倍超采样数字滤波器·32分贝的阻带衰减·+0.05至-0.05分贝通带纹波去加重滤波器的运作·36 dB抑制频宽衰减·-0.09到0.23 dB的偏差认为不理想，症状困扰评估滤波特性衰减器·7位衰减器（128级）集由单片机在-莱尔软静音功能的平行设置·（共约1024/fs静音时间）单声道设置·左或右声道单声道微控制器可选的内置的无限零检测电路Δ，两通道的D / A转换器·第三阶噪声整形·32fs过采样内置三阶后转换器的低通滤波器24引脚VSOP封装钼栅CMOS工艺

Meanwhile, a novel method with simple structure for zooming is proposed, which is able to be used in microlens array photolithography system for zooming.

同时提出了一种结构简单、可应用于微透镜列阵成像光刻系统调焦的新方法。

Defocusing effect on the patterns of microlens array imaging photolithography is analyzed, and tolerance of defocusing range of the system is given.

本文分析了离焦量对微透镜列阵成像光刻图形质量的影响，给出了系统离焦量的容差。

Objective To study the effect of spaceflight and radiation on the photosynthetic system of microalgae.

目的 研究空间飞行及辐射对微藻光合系统的影响。

Methods The rabbit model with hyperhomocysteinemia was established by L-methionine subcutaneouse injection. The changes of white microthrombus and microvascular diameter in pia mater microvessel were observed by using cranial window method and closed microcirculation detection system, The concentration of Hcy was detected by high performance liquid, The level of von Willebrand factor, endothelin-1 (ET-1) were assayed by ELISA. The content of NO was measured by nitrate reduction method. Meanwhile, the relationship between the changes of microvascular diameter and blood concentration ET-1, NO was analyzed.

采用L-蛋氨酸皮下注射法建立HHcy家兔模型，应用"颅骨窗口法"和微循环闭路检测系统观察其软脑膜微血管中白微栓数量及微血管口径变化；采用柱前衍生反相高效液相色谱－荧光法检测同型半胱氨酸浓度；平行观测血管内皮功能指标血管性血友病因子抗原（vWF，用酶联免疫吸附法）、血浆内皮素－1ET-1，用ELISA）、血清一氧化氮水平；并对HHcy所致ET-1、NO血液浓度变化和微血管口径变化进行相关分析。

According to the actual research, this paper has developed one kind of driving micro displacement working plat

本论文根据实际研究的需要，研制了一种采用摩擦轮驱动柔性铰链的微位移系统。

In the hot environment, the portable air-conditioning system can cool the body of a man.

在炎热环境中，便携式空调系统可以对人的身体进行冷热调节，创造一种微气候环境。

For example, 180 degree vector control with position sensor is a high efficiency control method.

采用瑞萨微控制器对提高系统效率有何帮助？

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。