发射的

Classes of emission, and with a power not exceeding that specified in the Schedule in relation to the class of emission and frequency in use at the time.

该电台用来发讯时，所用的发射形式必须是附表所指明的发射类别，频率亦须依照附表分别就该等发射类别所指明的频率，而功率则不得超过附表就当时正在使用的发射类别和频率所指明的功率。

However, transmission rate and bit error rate are fixed in some communication systems.

实际的通信系统一般要求传输速率和误码率一定，提出的算法就以最小化发射功率为目标，在发射端自适应根据MIM0系统各个空间子信道的增益来分配传输比特、发射功率，最终获得好的频谱效率，并在满足通信系统要求的前提下，降低发射功率。

In the same way failure area is not single andis more complex with decrease of scale of specimens. And failure shape ismore close to quasi-brittle failure. It varies with homogeneousness that thescale of specimens at which failure shape changes.(3) The failure shape of homogeneous specimens with crack is controlledby crack. But that of heterogeneous specimens with crack is controlled bycrack and heterogeneousness.(4) Acoustic emission doesnt appear until homogeneous specimens fail.

但对于不同均质度，试件破坏形态发生变化的尺度也不同；(3)对于均质度较高的含裂纹试件，试件的破坏形态主要受裂纹控制，而对于均质度较差的含裂纹试件，试件的破坏形态由试件材料的非均匀性和裂纹共同控制；(4)均质度较高的试件，破坏前，试件内不出现声发射，破坏瞬间，声发射在某些部位同时出现，且随尺度增大，试件声发射能量增大，声发射区趋于集中。

In this paper, nanopowders of rare earth oxides and tungsten were prepared and 0-3 type nano-composit rare earth tungsten thermionic emission materials were fabricated with novel technics. The raw material selection, preparation technic parameter, structure, physical and chemical characteristic, the rare earth distribution and the emission behavior were studied. The influence between the active layer and the thermionic emission performance, rare earth elements diffusion and distribution along depth were investigated in detail. The surplus RE formation and the electron transfer were discussed in theoretically. The thermionic emission current density of the single surplus RE on the active layer was educed. We adopted "liquid-liquid mixing, freeze-drying and two stage-reduction" working step firstly to produce the RE-W nanopowders including La-W powder, Ce-W powder and Y-W powder.

本文采用细化显微组织的新工艺，制备了纳米稀土钨粉末和0-3型纳米复合稀土钨热电子发射材料，探讨研究其原料选择、制备工艺及参数、结构特征、物理和化学特性、稀土分布均匀性、以及热电子发射特性；系统研究了稀土元素的高温扩散情况、高温状态下活性层中稀土的纵向深度分布、以及表面活性物质和活性层厚度对热发射性能的作用；从理论上分析阐释了超额稀土的形成及其电子的传递过程；并从理论上推导了活性层中单个超额稀土的热电子发射电流密度。

To improve the photoemissive sensitivity of nanoparticle composite photoemissive thin film and to fill the blank of rare earth application research in the field of photoemissive material, the rare earth elements are introduced into nanoparticle composite photoemissive thin film in the first time.

本文以纳米粒子复合光电发射薄膜需要进一步提高光电灵敏度为出发点，以稀土元素独特的性质及其应用研究在光电发射材料方面的空白点为切入点，首次将稀土元素引入到纳米粒子复合光电发射薄膜中，对现有的纳米粒子复合光电薄膜的光电发射性能进行改善和提高。

ATbstract: he small frequency modulated transmitter, the power is small, may launch the wireless signal, accepts the signal with the radio, satisfies certain transmission range, Circuit easy system, low cost, power output does not exceed 5-8 mW, firing range to be in the housing area of about 100 meters, with an ordinary FM radio receivers, demonstrating his superb sensitivity and clarity, the most circuit design challenges of the part is only used 3 V power supply, and half-wave antenna will be such a launch capability.simultaneously can input the sound signal, may install modulation surveillance table to serve as the monitoring device, although the power is not very big, but should the interference protection normal radiobroadcasting signal.

小型调频发射机，功率小，可以发射无线信号，用收音机接受信号，满足一定的发射距离。电路简单易制，造价低廉，输出功率不超过5－8mW，发射范围在房屋区可至100米左右，用一部普通的FM收音机接收，显示其灵敏度和清晰度俱佳，电路设计中最富挑战性的部份就是只需用3V电源和半波天线便有如此的发射能力。同时能够输入声音信号，可安装调制监视表头用作监视器，虽然功率不是很大，但是应该防止干扰正常的无线广播信号。

The research contents of this subject are mainly: Proposing the overall scheme of the soft firing technology, than confirm the best scheme; On the basis of best scheme , set up the mathematical model of soft firing system, and set up the interior ballistic trajectory calculating model among MATLAB/Simulink, set up soft the three-dimensional dynamics model of firing system among ADAMS; Go on joint simulation, simulating the characteristic curve of bore pressure and the sport law of piston and shot; Through adjusting the parameters such as piston quality、the diameter of unilateral valve、 charge weight、charge form coefficient and the delay time of lighting fire etc to make the soft firing system reach the best state of dropping the composition of forces of gun bore and increasing initial velocity of pill.

论文的研究内容主要是：提出软发射技术总体方案，确定最佳方案；在最佳方案的基础上，建立起软发射系统的数学模型，并在MATLAB/Simulink中建立内弹道计算仿真模型，在ADAMS中建立软发射系统的三维动力学模型；进行联合仿真，模拟膛压特征曲线及活塞和弹丸运动规律；通过对活塞质量、单向阀直径、装药量、药形系数、点火延迟时间等参数进行调整，使软发射系统达到炮膛合力下降、弹丸初速提高的最佳状态。

In this article, the OH radials produced by positive and bi-directional pulse corona discharge in a wire-pla...

一、OH(A~2∑→X~2Π 0-0)自由基的发射光谱利用发射光谱技术在大气压下测量了在氮气、水蒸气混合气体中线-板式正脉冲、双向窄脉冲电晕放电产生的OH(A~2∑→X~2Π 0-0)自由基的发射光谱及在潮湿空气中正脉冲电晕放电OH自由基的发射光谱。

It will take important influence to the launch rate, the launch denseness and the campaign efficiency of rocket gun applying the symmetrical launch method.

对称发射法是将离摇架中心较远的定向管一一对应同时发射，其应用会对火箭炮发射速度和密集度及作战效能带来重要影响。

The method is that corresponding farside direction tube away to cradle center is launched at the same time. It will take important influence to the launch rate, the launch denseness and the campaign efficiency of rocket gun applying the symmetrical launch method.

对称发射法是将离摇架中心较远的定向管一一对应同时发射，其应用会对火箭炮发射速度和密集度及作战效能带来重要影响。

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％。