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Adaptive modulation and coding by using convolutional codes is a key technology to solve the above problem.

利用删除卷积码实现自适应调制编码是解决上述问题的一个关键技术。

MMP2 and MMP-9 play an important role in the modulation of thophoblast invasion, and their expression is difference in difference stage of first trimester pregnancy, these provided experiment basement for deeply investigation action of MMPs in the mechanism of cytotrophoblast invasion.

MMP-2和MMP-9在调节滋养细胞浸润过程中起重要作用，且在早孕不同时期，二者表达不同，为深入探讨MMPs在滋养细胞浸润机制中的作用提供理论基础。

Long-term modulation of spine density, but not number of primary dendrites, by BDNF was gated by cAMP.

研究表明，BDNF 对突触后树突棘密度的长时程作用也受cAMP 的门控调节，但是BDNF 对神经元一级树突数目的调节并不受cAMP 的调控。

Its basic idea is to realize all kinds of radio communication functions, such as work band, kinds of modulation or demodulation, data format, encrypt mode and communication protocol by upgradable and displaceable software on a hardware platform which is opening, expanded and simple structure. And it makes wideband A/D and D/A converters close to the antenna, in order to develop more flexible and opening wireless communication system.

它的基本思想是以开放的、可扩展的、结构最简的硬件为通用平台，把尽可能多的通信功能，如工作频段、调制解调类型、数据格式、加密模式、通信协议等用可升级、可替换的软件来完成，并使宽带A/D和D/A转换器尽可能地靠近天线，以研制出具有高度灵活性、开放性的新一代无线通信系统。

Secondly, the vector control theory,the kinematics model and the sinusoidal space vector Pulse-Width-Modulation control technology were analyzed dividually, and then the mathematic simulation model of the servo system of PMSLM was built.

其次，综合运用电机控制理论和计算机仿真技术，分别对永磁同步直线电机的矢量控制原理、运动力学模型以及电压空间矢量脉宽调制技术进行分析，搭建了永磁同步直线电机伺服控制系统的数学模型。

The parasympathetic control of the atria involves modulation of chronotropic, dromotropic and inotropic activities, but the role of the parasympathetic innervation of the ventricles is still unclear.

副交感神经对心房可产生变时、变传导和变力作用，但是对心室的支配及对心室的调控作用还不清楚。

All-optical devices, such as in-line electrooptic modulation, all-optical wavelength converter and all-optical switch , built from this effect, as well as its applications in the AON are also studied in this paper.

目前，石英光纤二阶非线性效应的研究方兴未艾，但对其机理的解释仍众说纷云，对其未来的应用研究还刚伊始，它是当前的研究热点之一。

Two prism coupling method is used to implement the electrooptic modulation is proposed by changing the angle of the m lines before and after the voltage applied on the electrodes.

由于质子交换平面波导的导波层在加上电场后折射率发生变化，从而引起棱镜耦合输出的m线强度的变化，实现电光调制。

The nonlinear crosstalk due to cross-phase modulation was studied by a new analysis model in single-sideband radio over fiber systems, and the results were compared with that of the pump-probe method,which could be used to analyze different links, in particular, electrooptical upconversion links.

利用非线性薛定谔方程，推导计算了基于光学单边带调制的光载射频链路中交叉相位调制引起的非线性串扰，建立了新的分析模型，并和抽运探测法进行了比较。

Results:①The electrotonic modulation of T wave inversion was V1~V2V5~V6 in the right ventricular apical pacing group, and with T wave inversion in leads Ⅱ,Ⅲ, aVF, and without ST segment changes.

对74例由不同原因所致右胸导联T波倒置患者常规12导联心电图T波倒置的分布规律、倒置的深度以及是否同时伴有ST段改变、其它导联的T波倒置及其演变过程进行分析。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。