查询词典 avalanche conduction

The principle is using thefast breakover of avalanche transistor drive the electron tube. The full time of 4200Vvoltage is about 20ns. The circuit can normally work under 100kHz frequencies.Design an extra fast Q-switch circuit by series arrangement of avalanche transistor.

本论文主要做了以下几方面工作：1、推导了重复率激光基本参数(脉冲能量、脉冲宽度和峰值功率)与周期的关系，并且分析了重复率激光系统运转的稳定性。2、设计了雪崩管-电子管退压电路，由雪崩管驱动电子管开关，4200V高压退压沿20ns左右，能够在100kHz频率下工作。

The threshold of lithium tantalite under single-shot is found to be 1.84J /cm 2 and the avalanche rate was determined to be 1.01 cm 2 /J by calculation. We found that avalanche dominates the ablation process, while photoionization serves as a free electron provider.

在800nm飞秒激光脉冲作用下，钽酸锂晶体单脉冲烧蚀阈值为1.84 J /cm 2；在此基础上，我们通过建立钽酸锂晶体中导带电子密度演化微分方程，并数值求解，得到了钽酸锂的碰撞电离速率系数为1.01 cm 2 /J ，并得出在钽酸锂表面烧蚀中，光致电离提供种子电子，雪崩电离起主导作用的结论。

The RECCO AVALANCHE RESCUE SYSTEM utilizes advanced radar technology to make a quick location of an avalanche victim possible.

RECCO 雪崩搜救系统应用最新雷达技术，快速确定雪崩中可能遇难者的位置。

Once, we entered a mountain valley, arrives at the middle time, the star axle struggles suddenly is being called us to retrocede loudly, when the Queen of night last withdrawal mountain valley time, the summit heavy snow sudden avalanche, the entire mountain valley is buried, in the heavy snow avalanche's sound loudly, the star axle rapid breath appears that weak, must be cut off likely, she is really similar to the crystal butterfly is the same, cannot withstand including any wind and snow.

有一次，我们走进了一个山谷，走到中间的时候，星轨突然挣扎着起来大声叫着我们后退，当月神最后一个退出山谷的时候，山顶的大雪突然崩塌，整个山谷被埋葬，在大雪崩塌的轰然之声中，星轨急促的呼吸显得那么微弱，像要断掉，她真的如同水晶蝴蝶一样，连任何风雪都承受不住。

The article introduced the principle and apply of the transistor avalanche through four example of transistor oscillator、 avalanche oscillator、 audio signal generator 、 flash metronome.

本文介绍了晶体管的雪崩原理，通过张弛振荡器、崩振荡器、音频信号发生器和闪光节拍器四个例子介绍了雪崩晶体管的应用。

The deformation failure of the tunnel mainly presented as bending deformation and avalanche at the arch top and avalanche slip deformation at the arch foot, the self-stability is usually good.

隧洞的变形破坏主要表现为顶拱的拉张弯曲变形和崩塌及拱脚的崩塌滑移变形，一般自稳性较好。

By analyzing the working characteristics of the laser crystal, the temperature field and thermal distortion field analytical expressions of Nd:GdVO4 crystals with super-beam end-pumped were obtained by the equation of aeolotropy heat conduction, which considered heat conduction aeolotropy characteristic of Nd:GdVO4 crystal.

通过激光晶体工作特点分析，考虑到Nd：GdVO4 晶体热传导各向异性的特点，采用各向异性传热的Poisson 方程，得出了超高斯光束端面泵浦Nd：GdVO4 晶体温度场以及热形变场的一般解析表达式。

GROUP 2 showed that the time of MMC IIphase was longer than other groups (P. 01), while that of I phase^ III phase was normal; there were six patients without III phase, and three had antidromic conduction; GROUP 3 showed that the time of MMC I phase was longer than other groups (P. 01).while that of II phase ^ III phase was shorter; there were nine patients without III phase, and two had antidromic conduction.

FD肝郁气滞组表现为MMCⅡ相延长，Ⅰ相、Ⅲ相不延长；有6例无Ⅲ相出现，有3例出现逆向传导，Ⅲ相起始于十二指肠；脾胃虚弱组表现为Ⅰ相延长，Ⅱ相、Ⅲ相缩短；有9例无Ⅲ相出现，有2例出现逆向传导。

It's proved that the long duration response is stable under stationary random excitation, when the mean equation of the temperature in all parts of heat conductor shows no difference with the heat conduction differential equation under classical stationary heat conduction condition.

研究表明，在平稳随机激励下，导热系统的长时间响应也是平稳的。

This paper introduces the food refrigerated theory and the basis of the current industry refrigerated developments in the situation; And then in the long cylindrical-shaped food heat conduction process and the mathematical model using the method of differential thermal conduction equations for discrete, Programming come through long cylindrical-shaped food cooling process numerical solution; After further analysis of numerical solution of the test results; Finally, the impact of the cooling process food all relevant factors, such as moisture content, wind speed and temperature of the cooling medium for in-depth research, while comparing the different shapes of food to food cooling process.

本文首先介绍了有关食品冷冻冷藏的基础理论和目前冷冻冷藏行业的发展的发展概况；然后研究了长圆柱状食品热传导过程的数学模型并利用差分的方法对热传导方程进行离散，通过编程得出长圆柱状食品冷却过程的数值解；之后再分析解对数值解的结果进行验证；最后对影响食品冷却过程的各相关因素，如含水率、风速和冷却介质温度等进行了深入的研究，同时又对比了不同形状的食品对食品冷却过程的影响。

World War II: Battle of Saipan - Americans take Saipan.

1944年的今天，美国在塞班战役中拿下塞班岛。

When the scorner, the rejecter of truth, has become presumptuous; when the routine of work in the various money-making lines is carried on without regard to principle; when the student is eagerly seeking knowledge of everything but his Bible, Christ comes as a thief.{DA 635.3

当讥诮和拒绝真理的人，到了任意妄为时，当追求财利者罔顾按道义经营谋利时，当学人正在兢兢业业地研究各种知识，而单把圣经丢在一边时，基督要像贼一样来临。