发射体

The experimental comparisons and researches to p-type silicon cone and wedge arrays coated by four kinds of metals with same structures are done, and show that the gold and aluminum will be hopeful cathode materials of field emission devices which operate at low vacuum and atmospheric pressure.

对结构相同的覆四种不同金属层（Au，Al，Ni，Cr）的p型硅尖锥和楔形体阵列进行了实验比较研究，表明金、铝可望成为低真空和大气压环境下工作的场发射器件的阴极材料。

Then the muzzle flowfield with muzzle brake was simulated with the aforementioned experience. Those complex phenomena including precursor shock caused by quickly moving of projectile, muzzle flow structure produced by propellant gases, affection of blast wave behind muzzle area which formed by leading angle of muzzle brake, etc, can be observed clearly by these simulations.

同时藉由此经验，模拟含炮口制退器之炮口流场，获得炮管内因弹体高速移动产生之先导震波现象、高温高压之发射药气体於炮口形成之喷流结构及制退器排气导孔对后方震波压力传导之效应等良好结果。

One slightly concave cylindrical lens combination is used to change one laser beam into small sector in small angle, and one reflector projects the laser beam to prism driven by a motor to rotate in high speed to produce one reciprocating and scanning small sector plane.

采用微凹柱面透镜组将激光光源发射的一束激光拉成具有微小夹角的小扇面，利用反射镜将此激光束透射到由电机驱动的高速旋转多面棱体上，使激光束产生一个小扇形往复激光扫描光平面。

And then the temperature field and configure deformation of the primary and second mirror on the function of temperature gradient of axial, radial and circle direction. The characteristics of the dichroscope with body absorbing and face radiation are stated and the transient temperature field is analysized. The temperature field and configure deformation in different time is known and the influence on visible and middle infrared light is analysized. The advice to thermal control is put forward and the influence of self-radiation of the dichroscope to the detector is analysized.

接下来分析了主次镜在轴向、径向、周向温度梯度作用下的温度场分布及面型变形，阐述了分色镜的体吸收、面发射的特性并建立了分色镜的模型，对分色镜进行了瞬态温度分析，得到了不同时间内分色镜的温度场分布及面型变形，确定了其对可见光和中波红外光的影响，提出了温控的建议并分析了分色镜的自辐射对探测器的影响。

The broad excitation band and emission band can be seen from the excitation and emission spectrum .

由于Gd3+的掺入改变了基体的晶场结构，致使发射光谱发生了红移。

The results show that a large number of fine crystal grain are formed on the surface of a crystal nucleus eradiation equipment with cooling system while the vibrating bar of the equipment is inserted into 30% NH4Cl aqueous solution.

结果发现：当一种带有冷却结构和高频振动的晶核发射器棒体插入氯化铵溶液时，在棒体表面将迅速形成大量的细小晶粒。

Computer monitors work inside the electron gun to emit electronic, through the acceleration of high-voltage electrode, adjust shooting at the screen, the screen of fluorescent material by high-speed electronic flow impact, resulting in X-ray, while the computer's electromagnetic radiation of infant body brain development adversely affected.

电脑显示器工作时，内部的电子枪发射出电子来，经过高压电极的加速，调整射向荧光屏，屏幕上的荧光物质受到高速电子流的撞击，产生X射线，而微机的电磁辐射也对婴儿体、脑发育带来不利的影响。

In vertical direction, the vertical stress estimated by AE Kaiser effect tests is 7.7 MPa. The lithostatic pressure at the depth of 294m in granodiorite rockmass is 7.9 MPa.

在垂直方向，利用声发射Kaiser效应估计的垂直主应力为7.7MPa；在294m岩体静岩压力为7.9MPa；两者基本相同。

First, we designed to determine the optimum ultrasound-setting, such as power level and ultrasound frequency, to achieve the optimum number of ruptures in the spinotrapezius muscles by intravital microscopy.

我们设计了应用活体荧光显微镜，测量不同条件超声介导微泡破坏作用后鼠脊斜方肌血管破裂口的数量和荧光脂质体微泡的弥散面积，确定最佳超声发射参数；然后，在慢性鼠脊斜方肌模型上，测量荧光标记蛋白的荧光强度和血管密度，对比两种血管内VEGF基因载体系统经超声介导微泡破坏作用后定向转基因表达的效果。

A new method of obtaining secondary electron yield and secondary Cs〓 ionization probability by detecting target current and primary ion current under Cs〓 bombardment is put forward The dependence of Cs〓 ionization probability on primary ion energy, primary beam current and substrate compositions, as well as the dependence of secondary ion intensity on erosion time during transient period has been studied The mechanisms of secondary ion emission are explained

二、提出了通过测量靶流和一次束流求取Cs〓轰击下二次电子产额和二次Cs〓离化率的方法，实验研究了一次离子能量、束流强度及不同基体对二次Cs〓离化率的影响和瞬态过程中二次离子强度的变化规律，并对发射机理做了解释。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失