查询词典 plasma

A general Godunov finite difference schemes-WENO schemes which had fifth-order accuracy was used to make a numerical calculation for 2-dimensional axis symmetrical laser-supported plasma flow field under laser ablated solid target and laser ablated propulsion efficiency parameters(mechanical coupling coefficient etc.) was obtained by the simulation.The models of the calculation of ionization degree of plasma and the interaction between laser beam and plasma and the simplified eos of plasma were considered in the simulation.

采用针对高温气体电离度的一种近似计算方法，以及具有五阶精度的广义Godunov差分格式-加权本质无振荡格式WENO(weighted essentially non-oscillatory schemes)，给出了高温气体状态方程的简便描述，并考虑激光与等离子体的相互作用，模拟了强激光与固体靶相互作用时激光支持靶面等离子体流场的动态物理过程，并给出了不同参数条件下激光烧蚀固体靶的推进效应参数。

We found that in the case of neglecting magnetic shear, the plasma current also can be driven by the shear Alfvén wave and the circularly polarized wave, respectively, the efficiency of current drive in the rotation plasma is independent of the plasma density In addition, it is found that whether m=0 or m≠ 0, the effect of the magnetic shear on the compressional Alfvén wave current drive makes the efficiency be dependent on the plasma density and inversely proportional to it.

当考虑旋转效应而不考虑磁剪切效应时，等离子体平板模型下平面极化压缩阿尔芬波能够驱动旋转等离子体电流，驱动效率也与等离子体密度无关，却与旋转大小成正比，这与Avinash[Phys Plasmas 4，2204（1997）]的结论一致。我们发现在这种情况下剪切阿尔芬波和圆偏振阿尔芬波都可以驱动旋转等离子体电流，旋转效应引起的电流驱动与密度无关。

Subject: The purpose of this.thesis is to explore the therapeutic mechanism of Radix Astragli injection from the point of view of modern medicine through studying its clinical therapeutic effect on patients with chronic glomerulonephritis characteristic of "qi" deficiency in lung - kindney , and its effect on urine protein, plasma albumin, plasma cholesterol, plasma creatinine, urea, hemodynamies urine2-microgiobulin , T lymphocyte , plasma endothelin , nitric oxide .

目的：本文通过研究黄芪注射液对肺肾气瘀证慢性肾小球肾炎患者的临床治疗效果以及对蛋白尿、血浆白蛋白、血浆胆固醇、血肌酐、尿素氮、尿β_2-微球蛋白(β_2-MG)、血流变学、T细胞亚群、血浆内皮素、一氧化氮的影响，从现代医学的角度探讨其治疗作用机理。

BSpatial characterization of laser induced Cu plasma in air with different laser focusing distancesThe plasma spectra induced by pulsed laser ablation of copper target are measured. By adjusting the distance of the len-sample, the spectrum of air spark plasma、 Cu plasma and the reciprocity of both plasmas are analysed. From the result, it has been shown that the focusing of the laser beam has an important infunence to analyse the properties of the sample.

b 不同的激光焦点位置产生的等离子体光谱的空间特性研究激光烧蚀置于空气中的Cu靶产生等离子体，通过调节透镜与Cu靶的距离，本文观测了激光烧蚀空气产生的空气火花等离子体、激光直接烧蚀铜靶产生Cu等离子体以及空气火花等离子体与Cu等离子体相互作用等不同情况下的激光诱导击穿发射光谱，激光束焦点的位置在分析材料性质的过程中有着重要的影响。

Plasma is a dispersive medium and its equivalent refractive index is related to the frequency of the incident electromagnatic wave and the plasma frequency, so it is feasible to shift the syntonic frequency of plasma defect by changing the plasma parameters, which behaves as a tunable filter.

据等离子体的强色散特性，其等效折射率与电磁波频率及等离子体频率等参数有关，因而可以通过改变等离子参数，使一维微波光子晶体缺陷层的谐振频率发生偏移，实现微波光子晶体的可调谐滤波特性。

In this thesis, the heterojunction with intrinsic hydrogenated amorphous silicon thin layer ( heterojunction with intrinsic thin layer: HIT) solar cells are investigated. The solar cell structure of p/i/n are fabricated. The substrate is a typical 4-inch n-type wafer with (100) crystal orientation, 1~10 ohm-cm and about 525 μm thickness. The p and i a-Si:H layers are deposited by a 13.56 MHz plasma enhanced chemical vapor deposition. The i a-Si:H layers are especially deposited by pulse-wave modulation plasma technique with fixed plasma turn-off time toff = 10 ms and changed plasma turn-on time ton= 10 to 40 ms to selectively control the different silicon to hydrogen bonding configurations. The effect of various Si:H bonds on the performance of HIT solar cells are explored.

中文摘要本论文针对异质接面薄本质层(heterojunction with intrinsic thin layer： HIT)太阳电池进行研究，采用一般典型四英吋晶向为(100，厚度约为525 μm，电阻率约为 1~10 ohm-cmn型矽晶圆为基板，制作p/i/n太阳电池，p及i层薄膜以13.56 MHz电浆加强化学气相沈积，i层并采用脉波调变电浆技术，在固定电浆关闭时间toff = 10 ms及改变电浆开启时间由ton = 10 ms 至40 ms条件下制作具有不同矽氢键结微结构的氢化非晶矽薄膜以探讨不同矽氢键结对太阳电池性能的影响。

The samples were smeared on slides and stained with Giemsas stain. The stained smears were observed microscopically and photographed. It showed that except typical trophozoites in binary fission. the following trophozoites of abnormal morphs were also observed. for instance abnormal trophozoites with binary fission; enlarged trophozoites with round and irregular shaped eosinophilic bodies in the cell plasma; enlarged cells containing round and irregular shaped eosinophilic bodies and flagella; enlarged cells which contain 6 or 8 nuclear-like bodies and flagella, 3 or 4 embryonic forms of daughter trophozoite in one mother trophozoite; 4 trophozoite embryonic forms with fused plasma 3 trophozoites with fused plasma;4 trophozoites with fused plasma; a pair of trophozoite with binary fission fused with another trophozoite;2 pairs of trophozoite with binary fission fused each other; a trophozoite with 1 nuclear only.

结果 除观察到典型的营二分裂法繁殖的贾第虫滋养体外，还可见到多种形态异常的虫体，包括；虫体呈非典型二分裂；滋养体胀大，胞质中有团块状和不规则形状的嗜酸性物质；在胀大的贾第虫细胞内含有团块状和不规则形状的嗜酸性物质以及鞭毛；在胀大的贾第虫细胞内含有6或8个核状物以及鞭毛；在一个母体细胞中含有3或4个子体细胞的雏形；胞质互相融合的4个滋养体的雏形；胞质互相触合的3个滋养体，胞质互相融合的4个滋养体；1对营二分裂的滋养体与另一个滋养休互相融合；2对营二分裂的滋养体互相融合；仅有1个细胞核的滋养体。

The results showed that the higher thedischarge voltage or charge capacitor was, the higher the temperature of the plasma was,and the longer plasma discharge time was. There was a late discharge when the inputenergy reached the critical value. The greater the capacitance or voltage was, the earlier thelate discharge of the plasma was. The temperature changes of plasma at the beginning of alate discharge were not significant under different discharge conditions. Each SCB had itstemperature range respectively.

结果表明：放电电压或充电电容越大，等离子体温度越高，等离子体的放电时间也越长；对于不同的SCB，当输入能量超过一定的临界值后，将产生等离子体后期放电；电压或电容越大，后期放电开始的时间越早，而后期放电开始时的等离子体温度，在不同的放电条件下变化并不大，不同的SCB均有其各自的温度变化范围。

In the present study, tungsten oxide nanomaterials were synthesized by a modified plasma arc gas condensation technique. The effects of the plasma currents (70~90 A), chamber pressures (200~600 torr), production time（3~12 min）, oxygen partial pressure Ar:O2（1~6:1）and plasma including the hydrogen（0~10 %）on the preparation of tungsten oxide nanostructures were investigated. Pre-treatment on the tungsten oxide nanorods for surface modification was investigated by atmospherical plasma jet. The optical, filed emission, and gas sensing characteristics of tungsten oxide nanopowders were also examined.

本研究系利用电浆电弧气凝合成法来制备氧化钨奈米材料，分别探讨不同腔体压力（200~600 torr）、电浆电流（70~90 A）、制备时间（3~12 min）、氧分压Ar：O2（1~6：1）、电浆气含氢量（0~10 %）对於产物的形貌、相态影响，并使用常压低温电浆设备对氧化钨奈米棒进行表面处理，且针对氧化钨奈米材料的光学、场发射以及使用自行组装气体感测量测设备量测其气体感测特性。

Firstly, this paper introduces constitutes of plasma ignition system, the basic characteristics of plasma, pulverized coal combustion improved by plasma and quantity of heat analysis of plasma electropult.

首先，本文介绍了等离子体点火系统的基本构成、等离子体的基本特性、等离子体对煤粉的促燃效果以及等离子发生器的传热量分析等。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。