查询词典 electron-volt

There are two important mechanisms for increasing laser power afteradding hydrogen:(1)The gas temperature and CuBr vapor density at the center of lasertube are reduced, it decreases collision energy depletion of electron and leads to increaseelectron temprature;(2)Electron density increases during the pulse, the skin effect andthe" black center" of laser are improved.

同时，脉冲期间的电子密度增加，电子密度的趋肤效应减弱，激光的&黑心&现象被改善。2存在一个最佳充氢范围，其原因是：充氢后，随着气体温度的进一步降低，电子温度和铜原子数密度也将下降，它们与使电子温度升高的因素相互制约，抑制了激光能级粒子数的增长。

However, SONY's FD Trinitron picture tube vertical gun rack plus three single-beam electron gun structure, and Mitsubishi uses a new type of vertical rack plus three shots three-beam electron gun structure, such a structure known as the Mitsubishi "Diamondtron" that is,"Diamondtron" I feel like some combination of old and new materials products.

也正是SONY对其特丽珑显像管一向的高端定位，因此属于叫好不叫座的典型，继2002年8月份停止17寸显像管生产线之后，最近也停止了向 DELL这个SONY最大的OEM客户供应19寸纯平特丽珑显像管，估计19寸显像管的生产线也会在不久后停产，实在令人扼腕痛惜。

Using the two-stream fluid model, the linear dispersion relation is derived assuming a two-dimensional spatial geometry. Two cases are considered, one is that the 2D spatial geometry is defined by the plane containing the two counterstreaming electron populations and the perturbation wave vector , and the other is that the geometry is defined by the plane being vertical to the two counterstreaming electron populations .

对高能束流和电子回流构成的双流系统，建立冷等离子体流体模型，采用简正模分析方法，分别考虑扰动波矢在平行于电流传播方向的平面上和在垂直于电流传播方向的平面上这两种情况，推导了不稳定性的色散关系。

Aiming at the question of low output and high cost, a two-chambered microbial fuel cell based on the mechanism of microbial metabolism and electron transfer processes was coustructed. Glucose was used as fuel in MFC to harvest electricity through the biocatalysis of saccharomyces cerevisiae, the methylene blue was used as electron mediator of MFC.

针对微生物燃料电池输出功率低、成本高等问题，基于微生物的代谢作用和电子传递机制，采用葡萄糖作为燃料，以亚甲基蓝为电子介体，利用啤酒酵母菌的生物催化作用构建了MFC。

The paper involved two parts: Part 1: A two-chambered microbial fuel cell was constructed with high-concentration sodium acetate as fuel in the anode. The influence of different electron acceptors in the cathode, external resistance value, pH value and concentration of sodium acetate on electricity generation in MFC was investigated. The result showed that the maximum power density of 294.72 mW/m2 and the coulombic efficiency of 25.87% was achieved at sodium acetate concentration of 6.46 g/L, pH 7.0, external resistance 500Ωin the anode and when using potassium permanganate as electron acceptor in the cathode.

全文分为两个部分：第一部分：以乙酸钠为阳极原料构建双室微生物燃料电池，研究不同阴极受体、外接电阻、乙酸钠浓度和pH等因素对电池产电性能的影响，研究结果表明：在500mL的阴阳极反应体系中，选用乙酸钠作为阳极底物，质量浓度为6.46 g/L， pH 7.0，接入500Ω外电阻，阴极电子受体选择高锰酸钾的情况下，微生物燃料电池产电性能最好，最大电功率密度达到294.72 mW/m2，库伦效率能达到25.87%。

Nano-SnO powders were prepared by sol-gel technique using tin dichloride, oxalic acid and dehydrated alcohol as raw materials, and characterized by thermogravimertric analysis and differential thermal analysis, X-ray diffraction, transmission electron microscope, scanning electron microscopy in combination with various electrochemical methods.

以氯化亚锡、草酸和无水乙醇为原料，采用溶胶－凝胶法制备了纳米SnO粉末，并用热重－差热分析、X-射线衍射分析、透射电镜和扫描电镜等多种电化学方法对其进行了表征。

The regularities of the substitution effects of the electron-pushing group and the electron- withdrawing group on the electronic structures and the related properties of the complexes, e.g. the energies and the compositions of some frontier molecular orbitals, the spectroscopy properties, the atomic net charge populations on main ligands, the coordination-bond lengths and the coordination-bond angles of the complexes, etc. have been investigated.

探讨供电子基团和拉电子基团在主配体上的取代对配合物的电子结构及相关性质，如配合物前沿分子轨道的能量、组成、光谱性质、原子的净电荷布居及配位键长键角等的影响规律。

The results show that:(1) The space-charge fields(include dc space-charge fields and ac space-charge fields) have important effect on the beam-wave interaction output power, make the saturated output power lower, saturated position delay;(2) The back-radio excited by the electron beam has little effect on the output power, and can be ignored;(3) The transverse motions of electron beam has some effect of the output power;(4) The means of phase velocity taped and bunch compression can improve the relativistic TWT efficiency, especially bunch compression can greatly improve the efficiency.

五、分析了相对论行波管三维非线性特性，分析结果表明：(1)空间电荷场（包含直流和交流空间电荷场）对注波互作用输出功率影响很大，会造成饱和输出功率减小，饱和位置推后；(2)电子注激发的反向辐射对输出功率影响比较小，基本上可以忽略不计；(3)电子注横向运行对注波互作用的直接影响比较大；(4)通过改变耦合腔内半径来调节慢波结构相速，采用相速跳变和预群聚的方法可以改善相对论行波管的效率，特别是采用预群聚方法，可以尽量提高相对论行波管的效率。

The single-walled carbon nanotubes were characterized by means of transmission electron microscopy , high-resolution transmission electron microscopy and Raman.

单壁碳纳米管采用透射电子显微镜、高分辨透射电子显微镜和拉曼光谱进行表征。

The surface morphology and composition of the coating were analyzed by scanning electron microscope, X-ray diffraction, electron probe microanalyzer and infrared spectroscopy, and the effect of high-energy shot peening to Ti substrate and hydroxyapatite coating was discussed.

用扫描电镜、X射线衍射仪、电子探针和红外光谱仪分析了涂层表面形貌和成分，探讨了表面高能喷丸工艺对钛基体及涂层的影响。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。