查询词典 higher-ups

The number of Chaetognatha was higher in Bering Sea than in Chukchi Sea. The density of dominant species determined the total Chaetognatha abundance and it was higher in south than in north.

研究表明：( 1 )两区共记录毛颚类 7种，可分为 3个类群，在数量上，白令海的个体数明显高于楚科奇海；其平面分布的状况主要由优势种所左右，并且都呈现出南高北低的分布格局。

The triglyceride level in the lymphocele is not higher than that in serum, which is much higher than that in chyle.

淋巴管瘤中的甘油三脂含量跟血清差不多，但在乳糜池中就很高了。

But we could recognize the efferent ducts because the cilia of the ciliated cells became red using HE staining .The epithelial cell height became higher and higher with time passing by.

睾丸输出小管的扩张，上皮高度的下降变得扁平使它的管腔也变得圆滑，但是在HE染色下纤毛上皮细胞的长长的纤毛被染成红色倒成了辨别睾丸输出小管的标志。

Later, it makes some comparison with four kinds of modulation technique, and finally, it implements the three-level PWM switching power amplifier with the PWM technique. The power of the amplifier is 2kVA, and the frequency bandwidth is 10～3kHz. In the thesis, the author designs and makes the hardwares of the switching power amplifier. The hardwares contain power inverter rank circuit, control system circuit based on DSP, drive and isolation circuit, and protective circuit. The thesis also analyses the potential safety problems and put forward some solutions for the problems. Furthermore, the thesis accomplishes the software design of the control system, and successfully debugs it. The methods of designing higher power ampilfier are also discussed in the thesis. It analyses the feasibility of the methods, outlines the way of how to design higher power switching power amplifier, and does some experiments with the method of switches-parallelling.

根据电动振动试验系统对开关功放的要求，提出了以电感电流瞬时值控制技术为基础的三电平脉宽调制开关功放的设计方案，并通过系统仿真进行了原理性论证；然后设计并制作了开关功放的硬件，包括功率转换电路，基于DSP的控制电路，驱动、隔离电路以及保护电路；针对开关功放数学模型不易得出的特点，细致分析了模糊自适应PID控制方法，在此基础上编写了控制程序；研制出一台功率为2kVA，通频带为10～3kHz的三电平脉宽调制开关功放；论文中还探讨了实现大功率开关功放的方法，分析了各种方法的可行性，给出了实现大功率开关功放的思路，并进行了并联开关管实现大功率开关功放的实验。

Researched influence of frequency on characteristic of electromagnetic wave transmission in tunnels, and analyzed characteristic of electromagnetic wave transmission in circular, arches and curved tunnels by method of metal wave guide, and gives approximate formulas of attenuation rate. Main conclusions we obtain are as follows: in circular,rches tunnels, if frequency is higher, attenuation rate is smaller, it is beneficial for EM waves to transmit, in curved tunnel, higher frequency, more attenuation rate ...

研究了频率对井下电磁波传输特性的影响，采用金属波导法分析了圆形、拱形及弯曲隧道中电磁波的传输特性并给出衰减率近似公式，得出主要结论：在圆形和拱形隧道中，频率越高，衰减率越小，越有利于电磁波的传播；在弯曲隧道中，频率越高，衰减率越大，不利于电磁波的传播；通过特性曲线与井下实验数据相比较得出在900MHz左右为井下无线通信系统传输信号最佳频段。

Light utilization efficiency is highest in RDA, with respectively 18.52% and 23.08% higher than in rice-duck integrated farming and conventional farming systems. Energy circulation index in RDA is 0.096, significantly higher than in RD and CK.

稻鸭萍共作生态系统光能利用率最高，比稻鸭共作生态系统和常规稻作系统分别提高18.52%和23.08%；能流循环指数为0.096，显著高于稻鸭共作系统和常规稻作系统。

The development view of higher education can not circumvent the problem of the nature of higher education.

高等教育本质问题是高等教育发展观所不容规避的核心问题。

Along with economic and social development of our country, the call for the makings of civics is higher and higher.

随着我国经济和社会的发展，对公民的素质也提出了越来越高的要求。

Xviii, xxxv, lii, lix, lxix, cix, cxxxvii (xvii, xxxiv, li, lviii, lxviii, cviii, cxxxvi), those national anthems so full of love of Israel and almost startling in their hatred of the foes of Jahweh and of Israel, if read from the viewpoint of the writers, are sublime, vivid, glowing, enthusiastic, though exaggerated, poetic outbursts, instances of a "higher seriousness and a higher truthfulness", such as Aristotle never would have found ina song of Babylonia or of Sumeria.

十八，三十五，吕，柳， lxix ，捷达夥伴， cxxxvii （十七，三十四，李鹏， lviii ， lxviii ， cviii ， cxxxvi ），国歌，使这些充满爱心的以色列，几乎惊人的仇恨敌人Jahweh和以色列，如果读取的观点作家，是崇高的，生动的，光辉，热情，虽然有些夸张，富有诗意的爆发，情况是"更高的严肃性和较高的真实性"，如亚里士多德永远会发现那首歌的东风或

Compared with the blank controls, aldrin at concentrations higher than 80 μg/L decreased life expectancy at birth and net reproduction rate of maternal generation of the cladoceran, and that at concentrations higher than 160 μg/L shortened generation time and decreased intrinsic rate of population growth.

与空白对照组相比，浓度高于80μg/L的艾氏剂使多刺裸腹溞母代的生命期望和净生殖率显著降低；浓度高于160μg/L的艾氏剂使母代的世代时间显著缩短，种群内禀增长率显著降低。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。