查询词典 Pulse

7864 Differentiation of bone marrow mesenchymal stem cells into cardiomyocytes in rats following low-tension pulse electric stimulation: In the hope of verifying effects of electricity factors in development of the myocardium

伍长学1，马建旸2，赁可2，石应康2 低压脉动电刺激大鼠骨髓间充质干细胞向心肌细胞的分化：希望验证电学因素在心肌发育过程中作用

OBJECTIVE: To verify the influence of low-tension pulse electric stimulation on the course of myocardium differentiation, analyze its molecular biological mechanisms during the differentiation of rat bone marrow mesenchymal stem cells into cardiomyocytes.

目的：大鼠骨髓间充质干细胞向心肌细胞诱导分化过程中，验证课题提出的低压脉动电刺激对心肌分化过程影响的假设，并分析其分子生物学机制。

In this paper, design considerations and working style of data sampling and processing system for several decades nanoseconds laser reflective wave narrow pulse signal are provided.

文中介绍了为建立目标和背景的激光反射特性数学模型而研制的用于脉宽几十纳秒的数据采集系统的设计和工作方式。

In the laser processing technology, as for the laser punch, the key of the high accuracy punch is making the regular sequence pulse.

摘 要：在激光加工技术中，就激光打孔而言，制造出规则的序列脉冲是进行高精度打孔的关键。

Report results to physician if your pulse is lower than 60 beats a minute or if you suspect heart palpitations.

报告结果，医师如果您的脉搏是低于60队一分钟，或如果您怀疑心悸。

The transit time and gain characteristics of electrons which travel in the micro-channel plate gated by picoseconds high voltage pulse were simulated.

对皮秒高压脉冲驱动下微通道板中电子的渡越时间特性和增益特性进行了数值模拟，在电压脉冲波形分别为高斯形、三角形和梯形时，得到了电子渡越时间与电压脉冲宽度、幅度的关系曲线。

At present, laser process technology develops fast, since a laser light can obtain many good characteristics such as good direction, high energy density to focus the beam at a micrometer level, small pulse width ranging from dozens of Nanoseconds to dozens of Picoseconds, heating material immediately, decreasing heat effect on materials and so on.

由于激光束具有良好的方向性和高能量密度，可将光束聚焦到微米量级；由于激光束的脉冲宽度可达数十纳秒到数十皮秒，能够快速加热，对材料的热影响效应减小；因此，激光的以上优点为微加工提供了有利的条件，同时也促使激光加工技术迅速发展。

The model considers as many factors as possible, including nonuniform distribution of photon intensity and carrier density along active region, gain spectral dispersion, spontaneous emission spectrum and facet reflectivity, and is applicable under the condition that the pulse width of injecting signal is wider than 10 picoseconds. It provides a convenient and effective theoretical platform for SOA dynamic characteristic study.

该模型考虑光子密度和载流子浓度沿有源区的非均匀分布、增益谱色散性、自发辐射噪声谱和端面反射率，适用于脉冲宽度高于10ps的信号输入的情况，为后续研究SOA动态特性提供了方便而有效的理论验证平台。

Objective: To evaluate the therapeutic effects of high dose pulse oral calcitro on moderate and severe secondary hyperparathyroidism patients.

目的：观察1，25-2-D3大剂量间隙疗法治疗中重度继发性甲旁亢的临床疗效。

The characteristics of different implementation of the fiber-optic pulse replicators based on different techniques are compared according to the different performance requirements of insertion loss, periodicity and power stability of the output pulses in various applications.

针对常用的多路高速光脉冲复制系统可能的实现形式进行了研究，根据各种应用中所需的插入损耗、输出脉冲周期性与功率稳定性等性能要求，对多种光纤光脉冲复制结构的特点进行了分析比较。

Apllied the data of QuickBird-2——the highest resolution remote sensing,and based on the theory and methodology of fractal geometry,we have quantitatively studied remote sensing lineations in Gaolong gold deposit of Guangxi.

采用Quick Brid-2高分辨率卫星遥感数据，通过分形几何学的盒计维数法，定量研究广西高龙金矿区遥感线性构造。

So, sometimes, to change the color can not be your food (referring to the above-mentioned crustacean) has been a sign of boiling over.

所以，有时，来改变颜色，不能你的食物一直是沸腾了的迹象。