An HPGe detector was used to measure the hard X-ray energy spectrum produced by the interaction between the ultrashort pulse laser and copper solid target. 本实验使用高纯锗探测器,运用单光子法,对超短脉冲激光与固体铜靶相互作用产生的硬X射线能谱进行测量。
Cutting tiny annular groove on hard alloy guide wheel by method of electrochemical machining with pulse current in static electrolyte 硬质合金导线轮环槽静液脉冲电解加工
Firstly, in two sorts of samples of different nominal composition, the relationship between the formation of the hard domains with the amplitude of bias field and pulse field, the width of pulse field, are investigated by series of pulse low-bias field. 本文首先采用系列脉冲低偏场法,在两类不同标称成分的样品上,研究了直流偏场、脉冲偏场以及脉冲宽度的大小对硬磁畴形成的影响;
Though we cannot find any lines about modernization in his literary works, it is not hard for us to feel that the pulse of his thinking throbbed with the metabolism of the social organism when China was transforming from the traditional society to a modern society. 虽然我们在他的诗文中,找不到直接论及现代化的语句,但可以明显感觉到,他思维的脉搏与中国由传统向现代转型之际社会肌体的新陈代谢息息相关。
Pulse stream generator design is a key and hard technology in this system design. We use CPLD as pulse distributor so that motor movement can drive piston pout pulse stream, and the above design had been tested has good performance. 脉冲气流发生器是这个眼压测量系统设计中的一个难点和重点,我们通过CPLD实现脉冲分配,然后驱动步进电机产生运动,从而推进活塞产生脉冲气流,性能稳定可靠;
Because it is hard to obtain dynamic stress equilibrium and constant strain rate in soft materials specimen during the conventional SHPB experiments, a pulse shaping technique is developed. 本文重点针对传统的SHPB实验技术试样中早期应力不平衡和实验中难以达到常应变率加载这两大问题,建立了入射波整形技术。
According to the enterprise's request for the property of the hard anodizing film on the top surface of piston, a set of equipment for hard anodizing at high pulse current was auto-designed by the laboratory. 根据企业对活塞顶面硬质阳极氧化膜膜层性能的要求,实验室自行设计了一套在大脉冲电流下进行硬质阳极氧化处理的装置。
Generation of hard X-ray from solid target irradiated by UV high intensity ultrashort pulse laser 紫外超短脉冲激光辐照固体靶产生硬X射线研究
Requirements for Cooling and energy consumption in the low-voltage hard anodizing for aluminium using pulse current with simple sine wave were discussed. 本文对采用简单正弦波脉冲电流的低压硬质氧化工艺过程中冷却要求进行了讨论,这种低压脉冲电流是由一个60赫兹正弦波交流电压叠加一个数值上等于交流电压振幅的直流电压而形成的。
The formation of hard bubbles ( including dumbbell domains) in epitaxial garnet films by using a series of pulse bias fields was investigated in some detail. 实验研究了系列脉冲偏场作用下外延石榴石薄膜的硬磁泡(包括哑铃畴)的形成规律。
Hard anodization of casting aluminium alloy with pulse 铸铝合金脉冲硬质阳极氧化
Application of thermoluminescence dosimeter on the measurement of hard X-ray pulse energy spectrum 热释光探测器在脉冲硬X射线能谱测量中的应用
Especially, for hard involutes tooth surface finishing, combining the characteristics of pulse electrochemical finishing with the ways of gear machining, this paper design several projects of gear finishing and select the evolve project of conjugate curves used gear cathode as the testing project. 结合脉冲电化学光整加工工艺特性及齿轮生产中的特点,设计了多种齿轮脉冲电化学光整加工方案,并选择齿轮式阴极展成法作为最终试验方案;
Abstract The high silicon cast aluminum alloy with copper content was hard anodized by DC overlapped pulse power supply. The effects of pulse amplitude on film properties were primarily investigated. 以直流叠加脉冲电源对含铜的高硅铸造铝合金进行硬质阳极氧化,研究了电源脉冲幅度对膜层性能的影响。
It's hard to measure the transient pulsed laser wavefront in inertial confinement fusion ( ICF) system by the conventional methods for its short pulse width, large energy, high power and large distortion. 惯性约束聚变(ICF)系统中高能瞬态脉冲激光由于脉冲时间短、能量高、波前畸变大,通常的检测方法难于检测脉冲激光波前。
The adaptability of hard switch modulator to a variety of pulse waveform is best, but the efficiency is relatively low because the voltage is higher and size and weight is correspondingly larger. 刚性开关调制器对各种脉冲波形的适应性最好,但效率相对较低,电压高,体积,重量相应较大。
There exists some problems in practical test, i.e. it is hard to measure step force accurately by using force sensor, and it will bring serious errors by replacing the step signal with rectangular pulse. 提出在实际测试中存在的问题:力传感器难以正确测量阶跃力以及利用矩形脉冲代替阶跃进行处理会带来很大的误差。
A selective-excitation RF pulse that uses hard pulses composed of a sequence of composite pulses with positive and negative phases ( P/ N pulse) was proposed herein. It can be used for imaging studies to improve the efficiency of amplification at the lowest cost. 为提高射频功率放大器的效率,降低仪器的成本,我们提出了正负相位组合(P/N)选择性激发脉冲。
Power supply is one of the crucial factors that influence the hard anodizing technology. Now DC power supply and DC overlapped rectangle pulse power supply are the mainstream, but they have many problems in practical production so that the development of hard anodizing technology was confined. 电源是影响该工艺的关键因素之一,目前主要以直流电源和直流叠加方波脉冲电源为主,但是在实际生产中,这些电源均存在诸多问题,限制了硬质阳极氧化工艺的发展。
Moreover, it is found that the thickness of the same nominal compositions of garnet films affects the numbers of hard domains under low bias fields and series pulse. 另外,实验还发现,低偏场系列脉冲作用下,同一标称成份样品的膜厚对硬磁畴数目有一定的影响。