脉冲时间

Vulnerated by BIMⅣ bioimpactmachine,400KV the highspeed Xray photography was used to observe the compression and deformation of the liver during the direct impact of the central part of the xiphoid process in different delay time.

新西兰兔麻醉后，快速推注60%泛影葡胺40ml，用BIMⅣ型生物撞击机致伤，在钢球撞击剑突致伤的同时，400KV高速脉冲X线机在不同延迟时间拍摄撞击瞬间腹腔及肝脏的变形情况。

We used counting - interpolation time interval measurement principle and alternate storage ZDT, refined arming timing into two different measurement timing, pointed out requirement of zero dead time arming under different modulation domain measurements , gave the design of zero dead time module in modulation domain pulse analyzer, and introduced the realization method in detail. The correctness of the method has been verified in work.

文章采用计数-内插时间间隔测量原理和交替存储ZDT，并将触发时序提炼为两种不同测量时序，通过分析，指出不同测量时序下实现调制域测量功能对无死区触发要求，给出调制域脉冲分析仪无死区触发模块设计方案，详细介绍无死区需求实现方法，并已在工程中验证了该方法的正确性。

During the low temperature plasma polymerization, different factors (reaction power, pulse duty factor, reaction time, bias voltage and pressure) were investigated to get the best film. The results of X-ray photoelectron spectroscopy and Fourier transformed infrared spectoscopy implied that polymer nano-film containing carboxyl or amido were deposited successfully by using allylamine or acrylic acid as a reagent, respectively.

低温等离子聚合过程中，研究了反应的功率、脉冲占空比、反应时间、偏压、反应室压强这五个因素对薄膜性质的影响，确定了最佳的工艺参数。X光电子能谱和傅立叶转换红外光谱分析结果表明，以丙烯胺和丙烯酸为反应物可以在样品表面分别得到含有羧基或氨基的有机薄膜。

Frey and Messenger (1973) and Guy,Chou, Lin, and Christen- sen (1975) confirmed that a microwavepulse with a slow rise time is INeffective in producing an auditoryresponse; only if the rise time is SHORT, resulting in effect in asquare wave with respect to the leading edge of the envelope ofradiated radio-frequency energy, does the auditory responseoccur.

1973，1975年这些人FREY， AND MESSENGER，CHOU， LIN， CHRISTEN－SEN确认，缓慢增加的微波脉冲不会引起听觉反映，只有增强时间非常短暂，以至影响了辐射射频边缘，才会导致听觉反应。

A non invasive evaluation system is developed to estimate the ratio of pulmonary to systemic pressure with audio Pulsed Wave Doppler signal and ECG,and to calculate those parameters automa...

小儿肺循环无创评估系统利用计算机自动处理主、肺动脉音频脉冲多普勒信号和心电图信号，计算它们之间的血流时间间期参数比，最后估算出肺动脉的血压

The multipath effect is an avoidless problem which the tracking radar and the searching radar among CIWS has to face. This paper analyses the form of the multipath effect on geometry, emphasizes the distance difference between the direct wave and the reflected wave, according to this inherent characteristic, the paper introduces the theory of HRR to the design of radars among CIWS, discusses the spike pulse technology and ultra wide hand technology which often be used, finally proposes the method of time-frequency code to obtain the high range resolution and avoid the multipath effect.

多路径效应是近程反导武器系统中的搜索雷达和跟踪雷达均无法避免的问题，文中分析了多路径效应形成的几何原理，并根据多路径效应中的直射波与反射波具有路程差的固有特性，将高距离分辨率雷达信号理论引入到近程反导武器系统的雷达中，讨论了实现高距离分辨率的窄脉冲和超宽带技术，最后提出了目前较易实现的时间－频率码合成高距离分辨率的办法。

A time domain differential equation model is established by using the axisymmetrical form of the Maxwell's equations,and the finite element time domain method is applied to solve the model.

使用麦克斯韦方程组的轴对称形式建立时域微分方程数学模型，应用时域有限元法求解，给出了数值算例，模拟了在不同缺陷参数下涂有电介质的导体对入射脉冲太赫兹波的响应，并归纳了响应在空间上和时间上的变化规律。

Subthreshold micropulse diode laser treatment can shorten a laser pulse limits, reduce the spread of photocoagulation damage caused by heat conduction during a laser exposure, avoid chorioretinal scars which could expand or increase the risk of iatrogenic choroidal neovascularisation and improve long term visual prognosis.

黄斑水肿的治疗近年来得到广泛的关注，成为研究的热点，但各种新方法的并发症和疗效尚存在一定的争议，阈下微脉冲半导体（810nm）激光治疗黄斑水肿，减少激光曝光持续时间和使用不可见激光斑，能降低可见光凝斑本身对黄斑区视网膜脉络膜的损害，减轻黄斑水肿和提高视力。

As an example, two Duffing oscillators coupled with linear and nonlinear stiffness terms are investigated.

作为例子，考察了两自由度线性与非线性刚度耦合的Duffing振子，证明了其响应的非高斯特性依赖于脉冲平均到达率和系统弛豫时间的乘积，并用Monte Carlo模拟验证了该方法的可行性。

The PSCA_3 fragment was selected for its superior expression level in eukaryotic cells.Then the sig-PSCA_3-Fc-GPI genetic fragment was cloned into pVAX1-neo-IRES-GM/B7 vector to construct the final immunological inhanced DNA vaccine pVAX1-PSCA_3-FcGB. Immunofluorescence and flow cytometry were used to confirm the expression of PSCA_3 fragment by transfected into Cos7 cell.Finally,the anti-tumor effect of pVAX1-PSCA_3-FcGB was tested in murine prostate cancer model generated by RM-1 cell line.The animal was immunized with pVAX1-PSCA_3-FcGB DNA vaccine by intramuscular injection plus electroporation,pVAX1 and pVAX1-PSCA_1-FcGB plasmid were used as control.The inhibitory effect of tumor was investigated by observion of forming time,volume and inhibition ratio of tumor.Results:DNA sequencing conformed that the heterological PSCA fusion antigen fragment which was synchronized by overlapping-extending-PCR,was consistent to design.Enzyme digestion analysis showed that the 1 to 4 copies heterological PSCA fusion antigen fragments were constructed successfully.

方法(1)检索GenBank，选择包含人主要T细胞抗原表位序列的人PSCA基因片段，应用异种化抗原设计技术，保留人T细胞抗原表位，设计异种化PSCA融合抗原片段；(2)根据核酸序列按中心模板法设计引物，应用重叠延伸PCR技术拼接合成异种化PSCA融合抗原片段基因，以PCR、限制性酶切和DNA序列测定法进行鉴定：(3)利用DNA限制性内切酶BssHⅡ和MluⅠ酶切后粘端互补的特点，采用同尾酶法构建1—4拷贝异种化PSCA融合抗原片段(PNCA_1-PSCA_4)，并将上述片段分别插入真核表达载体pCI-neo-Fc-GPI中，转染293T细胞，借助免疫荧光+流式细胞术考察插入片段表达效率，最终选定PSCA_3片段进行下一步研究；(4)将sig-PSCA_3-Fc-GPI基因片段自pCI-PSCA_3-Fc-GPI质粒上切下，插入pVAX1-neo-IRES—GM/B7载体中，构建免疫增效DNA疫苗pVAX1-PSCA_3-FcGB，并应用转染Cos7细胞+免疫荧光/流式细胞术方法鉴定其在真核细胞中的表达情况；(5)给8周龄雄性C57BL/6小鼠皮下种植RM-1细胞，制备小鼠前列腺癌模型，并采用股四头肌肌肉注射+电脉冲法(Electroporation，EP)接种DNA疫苗质粒pVAX1-PSCA_3-FcGB，同时接种pVAX1空载体质粒和pVAX1-PSCA_1-FcGB质粒作为对照，通过观察计算免疫动物的成瘤时间、肿瘤体积和抑瘤率，来评价该DNA疫苗在小鼠体内的抑瘤效果。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。