查询词典 modulation

An overmodulation algorithm for space vector pulse width modulation suitable for current source converters is proposed.

提出一种适用于电流型变流器(current source conver- ters， CSC)的空间矢量过调制策略。

The proposed algorithm divides the overmodulation range into two parts, and allows smooth transitions through the entire operating area, from the linear range up to six-step operation, and keeps the linear relationship between the output current and the modulation index.

该方法根据调制比将整个过调制区域分为两部分，能实现变流器从线性区域到六脉波状态的平滑过渡，并且保证输出电流和调制比之间成线性关系。

NADP-Dependent Retinol Dehydrogenase/Reductase identified from rabbit liver cytosol is involved in oxidoreduction between retinol and retinal with high activity. Therefore, NRDR plays an important role in modulation of the retinoids and RA homeostasis.

辅酶Ⅱ依赖性视黄醇脱氢/还原酶NADP(H-Dependent Retinol Dehydrogenase /Reductase NRDR是黄东阳教授等从兔肝中发现并纯化的一种酶，具有很高的催化视黄醛和视黄醇之间氧化还原反应的活性，对体内类视黄醇和维甲酸的代谢平衡起着重要的调节作用。

The calls of non-passerine are some kinds of monotonous dull vocalizations with the characteristics of low and deep frequency, single syllable, low basic frequency and with no ability of modulation in frequency and amplitude. Most of the calls are monotonous and low quality mainly based on the basic song. Compare the vocal of sub-oscine passerine with non-passerine, they have some similar aspects, but the former possesses of stronger capability of vocal control.

非鸣禽的叫声低沉而单调，音节种类单一，基本音频率低，缺乏频率调制以及幅度调制的能力，叫声的品质因数很低，不悦耳，大多为以基本音为主的单音调低音品叫声，亚鸣禽的叫声与非鸣禽近似，但在控声能力方面又有所提高。

GDxVCC is an automatic computer- controlling system, which combines scanning laser technology and polarization modulation, provides retardation map of peripapillary retinal nerve fiber layer caused by birefringent properties of the RNFL. The quantitative description of RNFL may be obtained after the map is analyzed.

GDxVCC系统采用自动化的电子计算机控制系统，将激光扫描技术和偏振调制器相结合，提供因视网膜神经纤维层双折射特性所产生的视盘周围视网膜神经纤维层的延迟图像，通过对图像的分析处理，获得视盘周围视网膜神经纤维层厚度的定量描述。

At early stage of cancer cell formation, provoked autophagy help to eliminate damaged cell organelle、and degrade the noxious substance in endochylema(eg: peroxidate)as well, pretect normal cells from cancerization.Autophagy level modulation might be cooperation or rivalry with chemotherapy to cancer cells compares to single use of chemotherapy drugs, apoptosis rate of cancer cells fluctuates with autophagy level.

癌细胞形成早期刺激自噬能够清除受损细胞器，分解细胞内过多的有害物质，阻止正常细胞向癌细胞转化，调控自噬的表达和化疗药物联合对肿瘤细胞的生长有协同或拮抗作用，表现为与单纯用化疗药物相比，调控自噬表达后肿瘤细胞的凋亡率发生了变化。

Can move on each type microprocessor, the compatibility is good; In the plastin is small, the efficiency is high, has the high modulation and the extension; Has functions and so on document and table of contents management, equipment support, multi-duties, network support, graph window as well as user interface; Has the massive application program interface; The embedded application software is rich.

能运行于各种类型的微处理器上，兼容性好；内核精小、效率高，具有高度的模块化和扩展性；具备文件和目录管理、设备支持、多任务、网络支持、图形窗口以及用户界面等功能；具有大量的应用程序接口；嵌入式应用软件丰富。

The researches on this field will provide new knowledge and new ways for the development neuroendocrinimmune modulation theory and practic.

这方面的研究对于神经内分泌免疫调控理论和实际的发展，将提供新知识和新途径。

To predesign conversion way of unchanged ofdata bit to be zero, and initial transmission applies conversion way of zero modulation to send data b.

判断是否需要重传，如果不需要，则返回步骤a发送新数据；否则，判断预先选定的变换方式是否已全部用过，如果不是，则依序选择下一变换方式，如果是，则从变换方式0开始重新依序选择；c。

These results indicate that the brain endogenous opioid system seems to play a major role in the modulation of the micturition threshold and the frequency, whereas in the spinal region, enkephalinergic neurons seem to control the activity of sacral preganglionic neurons.

这些结果显示，脑部之内吗啡系统的抑制作用，主要和排尿反射阂值之调控有关，而脊髓部位的内吗啡系统则可直接对副交感神经节前神经元造成抑制性作用。

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。