发射

Compare the data structures of pressure fluctuation signals and AE signals both sampled in gas-solid fluidized bed, and the difference of data structures among AE signals sampled in gas-solid fluidized bed, pneumatic transport tube, slurry bubble column, liquid-solid loop reactor, and liquid-solid stirred tank. Based on the compare, the corresponding relation between signal structure and physical multi-scales was established.

通过对气固流化床的声发射信号与压力脉动信号的结构比较，以及气固流化床、气力输送、气液固淤浆鼓泡床、液固环管及液固搅拌釜中声发射信号多尺度结构差异比较，建立了多相流体系随机信号多尺度结构与物理多尺度的对应关系，认为在有固体颗粒存在的多相流体系，微尺度信号代表了颗粒相对于主体流动的运动状态；介尺度代表主体流相对于系统的运动或者不同主体流之间的相互运动；宏尺度则反映整个系统状态随时间的变化。3。

Under the contract, a Lockheed Martin-led industry team will develop three types of expendable communications buoys: two submarine-launched tethered buoys that provide real-time chat, data transfer and e-mail capabilities via either Iridium or UHF satellites; and an untethered, acoustic-to-radio frequency gateway buoy that can be launched from a submarine or maritime patrol aircraft to enable two-way data transfer between a submerged submarine and surface assets.

根据合同，洛克希德马丁公司领导的工业团队将开发三种类型的消耗通信浮标：两个潜艇发射栓浮标提供实时聊天，数据传输和电子邮件功能，通过任何铱星或超高频卫星；和非系留，声学对无线电频率网关浮标，可以从潜艇发射或海上巡逻机，使双向之间的数据传输水下潜艇和水面资产。

The electron transfer rate of carbon nanotube field emission hopping electron cathode has been studied with experimental method.

对应用碳纳米管场发射的跳跃电子阴极的三极管结构的电子通过率的研究，提出了的栅网上蒸镀高二次电子发射系数的介质膜的方法，可以有效地解决栅网的截获问题，提高电子通过率。

This paper presents the CVD growth and the field-emission of carbon nanotubes as a large current density cathode.

研究了碳纳米管作为大电流密度场发射阴极的CVD生长情况与场发射性能。

XIE Kuo-jun, ZENG Bao-qing, YANG Zhong-haiAbstract: The crystallite diamond films were synthesized on copper substrate by microwave plasma chemical vapor deposition technique. The field emission characteristics and the electrical characteristics of contacts between metal and diamond file have investigated Electron emission tsting indicates low turn-on voltages.

用微波等离子化学气相沉积法在无氧铜基底上沉积微晶金刚石制作场发射冷阴极阵列，研究场致发射特性和金刚石与铜基底之间的欧姆接触特性。

This red light on top of button is the Show of ultrasonic launching.3:Training the dog: Function switch dial in the "OFF" position, With the Ultrasonic generator toward dog, Pressed the button "TRAINING CALL" at Back, which will be issuing 23KHz ultrasonic of 100dB strong, with gestures and password, your dog can be trained to do some specific action.

此按键上方的红灯是超声波发射指示灯。3。训狗：功能开关拨在&OFF&位置，超声波发射头对住狗狗，按动背面的&TRAININGCALL&按键，即会发出23KHz约100dB的超声波，配合手势和口令，可训练您的爱犬做一些特定的动作。

This paper introduces the theory of acoustic emission detection and its application in ultrahigh-pressure vessel and evaluates the results as well.

介绍声发射检测的原理和声发射检测在超高压容器上的应用，并对其结果进行评

By analyzing the electron emission waveforms, the natural parameters of the ferroelectric electron emission and the theory of the electron emission have been generalized.

其中，对BT、BNBT两种环保无铅铁电材料电子发射性能的详细研究，并公开报道了其最大发射电流密度分别为30A/cm~2、20A/cm~2，这在国际上尚属首次。

The content of impregnated Ba, Ca aluminates in the bodies can meet the requirements of the conventional impregnated cathode. Emission experiment results show that the space charge limited current density of this kind of cathode has reached more than 30A/cm^2 at 850℃.

发射试验结果表明，这种阴极在850℃的工作温度下空间电荷限制的电流密度超过30A/平方公分，在超过2000h的寿命实验过程中发射仍持续上升，因而在要求高电流密度和一定寿命的微波电子管中具有光明的应用前景。

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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。