脉冲

In the design of the power supply, the main circuit topology frame uses full-bridge series resonant switching and parallel load connection, in which, four MOSFETs are adopted as the power switches, and by four pulses which UC3879 produces, high frequency operation and fast response are realized. In addition, the MOSFET in the switching power supply has no hard turn-on or turn-off situation in transition, thus the disturbance to the power system is avoided. Especially,by the use of high frequency transformer, PQ50/50, the switching power system can provide the steady discharge current without any amperite.

此开关电源采用全桥软开关技术、串联谐振并联输出，四个MOSFET管为主控制开关元件，通过脉冲产生电路UC3879产生的四路相关脉冲实现了高频交替开关，同时能快速响应输出的各种变化；避免了开关管的硬开关，提高了转换效率，另外通过采用高频变压器PQ50/50隔离了原副边，减小了高次谐波对电网干扰；无需镇流电阻也可实现气体稳定放电。

So, in view of the peculiarities of the short-term dynamic model and the impulse response function, impulse response is stable and sensitive. In the short-term period, the central bank has a greater control of Ml through the conduction of the base currency and the result is better. It can also prove that the money multiplier of our country has long and firm relations with other elements except the base currency. Through the short-term dynamic equation, it successfully calculates the money multiplier beyond the sample and provides the basis for the central bank to prefigure the regular alteration of the money multiplier.

实证检验显示，中央银行运用货币政策工具时受外汇占款变量的制约影响太大，而再贷款成了调控基础货币投放的主要对冲手段，它的作用的发挥有赖于外汇占款的变动情况，存在明显的被动性。2、基础货币与M1和M2存在长期稳定关系，从长期来看基础货币对M2的冲击影响强于对M1的影响，而从短期来看基础货币对M1的影响要强于对M2的影响；M1和M2在基础货币冲击下具有冲击的放大传导机制和缓沖传导机制，脉冲响应具有稳定性和灵敏性，基于短期动态模型和脉冲响应函数所表现出的特征。

After the calculation, the physician can read the numbers of pulses that would be required for this ablation, and the sizes of the various pulses created with various spot scanning ,next ,the surgeon is able to utilize the star s4 excimer laser to create a prevue lens with this calculated ablation so that the patient can subjectively assess the vision quality benefits of this particular correction.

在进行计算以后，医师能读取切削手术必须的脉冲数量，并且由变量光斑扫描所带来的不同脉冲的大小，然后，外科医生能运用VISX STAR s4准分子激光子童打制虚拟角膜镜片，这样医生可以主观地评估这一特定的矫正手术的视觉质量的优越性。

In view of the principle of pointbypoint comparison method, the foundation deciding whether the middle point interpolation is the control step error of NC system has been advanced, the math mould of inserting and compensation method established and the function that judges error by interpolating method has been improved.

基于逐点比较法原理，提出中点插补算法作为数控系统控制步进的偏差判别依据，建立了插补算法的数学模型，对插补算法偏差判别函数进行了改进和完善。实例分析结果表明，中点插补算法使插补精度由原来的小于等于一个脉冲当量提高到小于等于 0 。5个脉冲当量，插补点大幅度地下降，系统的响应速度加快和插补精度提高

Analyses show that refractive index changeinduced by thermal effect is similar to the change induced by other effects for linearabsorption,if laser pulse width is far less than the characteristic time of sample,i.e.refractive index change is directly proportional to spatial part of incident pulse laserintensity,so time averaged nonlinear refractive index can be defined.

结果表明，当激光脉冲宽度远小于被测样品的特征时间时，对于线性吸收来说，其热效应产生的折射率变化与其它效应产生的折射率变化有类似的形式，即与入射脉冲激光光强的空间部分成正比。因而可定义时间平均非线性折射率。在这种情况下，可用通常的Z-scan法进行非线性折射率及热光系数的测量，所得结论符合以前的实验结果。

The results revealed that the frequency of pd-II3 sub-phase and the pule number of pd-II2 were the important behavioral events responsible for the non-persistently virus acquisition and inoculation respectively.

结果表明，早期取食行为过程中pd-II3亚阶段的脉冲频率和pd-II2亚阶段的脉冲数目分别是蚜虫获毒、接种相关的重要行为细节指标。

The standard Bruker pule sequence NOESYGPPR1D , which is a presaturation experiment for water suppression incorporating the first increment of the NOESY pulse sequence and a spoil gradient .

期待有人能为我解答这个压水峰的脉冲序列做实验时用到这个脉冲序列压制，但不知道原理，文献中提到

The effects of the braking pulse on vehicle dynamics and on the driver's steering activity depending on the pulse length ΔT have been investigated.

的影响制动脉冲对车辆动力学和司机的指导活动取决于脉冲长度ΔT场进行了调查。

Firstly, we studied the relationship between the amplitude of the wakefield and pulse length and an optimum length exists which equal to 〓 for Gaussian profile.

在MP-LWFA中，我们研究不同的脉冲长度、不同的脉冲间隔对产生尾流场的影响，着重讨论尾流场的饱和机制。

The influences of dispersion length and nonlinear length on the pulse′s self-similar evolution are studied,and the self-similar evolution conditions of the input pulse are obtained.

研究了色散长度和非线性长度对脉冲自相似演化的影响，获得了放大器中脉冲实现自相似演化的条件。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。