等环的

With the merits of space vector modulation: digitized control,harmonic decrease,high ratio of voltage used,fast dynamic response and so on,and at the same time deadbeat and DSP control is introduced, as well as two-loop control of the system,we gained power factor is near unit and current THD is well below 10% in our digitized arc welding power system.

基于空间矢量脉冲宽度调制技术的易于数字化、可降低谐波、电压利用率高、动态响应快等特点，引入无差拍思想、总体系统的双环控制思想和DSP控制，实现了功率因数为1，电流谐波畸变远小于10％弧焊电源系统的数字化。

In previous work of helicid's structure modification show that 4 substituted groups of helicid are some ordinary acyclic and substituted aniline group, and it had no heptad heterocyclic substituted group.

在前期的豆腐果苷结构修饰工作中，豆腐果苷4位取代基多为一些简单的脂肪族、取代苯胺基等，尚无七元杂环作为取代基的此类化合物。

The factors such as introduction of aromatic heterocycle with small delocalization energy, formation of acceptor-donor structure, and strong electron-donating or electron-withdrawing abilities of substituents lead to the high third-order nonlinear optical property.

引入离域能小的芳杂环，形成吸供构型，增大取代基的吸或供电子能力等有利于获得较大的三阶非线性光学性能。

And it is an important interlink in industrial water supply treatment.

预处理的好坏直接影响电渗析、反渗透、离子交换等主要处理工艺的技术经济效果和长期安全运行，它是工业给水处理中非常重要的一环。

Circum-Pacific seismic belt volcanoes, including the eastern Pacific, North America and South America's western mountains, as well as South and North America between the Caribbean - Antilles region, the western edge of the Pacific, the Aleutian Islands, Kamchatka Peninsula, the Kuril Islands, south through Japan, the Philippines, New Zealand and so on until a series of islands and island.

环太平洋火山地震带，包括太平洋东面、北美洲和南美洲的西部山地，以及南、北美之间的加勒比—安的列斯地区，太平洋西部边缘的阿留申群岛、堪察加半岛、千岛群岛，向南经日本、菲律宾，直到新西兰等一系列群岛和岛屿。

It also can be used as the controlling indicators for membrane bio-fouling in the prophase. When the bio-fouling membrane was anatomized, it shows that the bio-fouling membrane are meshy and coupling, whose primary ingredients are organics matter such as albumin, benzene ring, hydroxyl acid, fatty acid and so on, as well as microorganisms such as cocci, bacilli, leaf mold, alga and so on.

微生物污染解剖试验分析表明，严重的微生物污染薄膜成网状粘联结构，分析到的主要成分有白蛋白、苯环类、脂肪酸和芳香烃类等有机物，可观察到的微生物有球菌、杆菌、霉菌和藻类。

The antibiotic resistance of staphylococcus aureus was detected by K-B method. Of 33 staphylococcus aureus stains isolated from food, 28 were resistant to penicillium and ampicillin, the resistance rate was as high as 84.8%.21 stains were resistant to carbenicillin, the rate was 63.6%.5 stains were detected resistant to methicillin, which took up to 15.2%. The stains also were resistant to cephalosporin antibiotics, aminoglycoside, microcline antibiotic and tetracyclines in different levels, all strains were sensitive to vancomycin.

结果 33株食品中分离的金黄色葡萄球菌，有28株对青霉素和氨苄西林耐药，耐药率高达84.8%；21株对卡比西林耐药，耐药率达63.6%；检出了5株耐甲氧西林的菌株，耐药率为15.2%；对其他头孢类抗生素、氨基糖苷类、大环内脂类、四环素类等都出现出不同程度的耐药；所有菌株均对万古霉素敏感。

The composi tional change profiles of monazite demonstrate a heterogeneous distribution of e lements La, Ce, Nd, P, Th, Si, Ca and U. This was caused by the differences in geological environments, temperatures, pressures and compositions of the hy drothermal solutions.

根据微区剖面(0.18mm)元素分布曲线，指出了La、Ce、Nd、P、Th、Si、Ca和U等元素表现出8～10个微环带成分不均匀分布的特点，并认为成矿溶液的地质环境、温压和微量元素含量变化是不均匀分布的主要原因。

Nitrogenous heterocyclic compounds, which has a good deal of chemical reactions and chemical structures, are very important in the field of application, medicine, biology, medicine, pesticides, and other fields.

含氮杂环是一类具有重要应用价值和良好生物活性的化合物，它们不仅具有丰富的反应化学和结构化学，并且在生物、医药、农药等领域具有重要的应用价值。

The relation between the output phase differences and the losses of 2×2 and 3×3 optical fiber couplers with rotatory symmetry is deduced in this study, which is based on the characteristics of scattering matrix and Hermite positive definite quadratic form of the couplers.

前 言光纤耦合器用于诸如光纤干涉系统、光纤环、波分复用器件和光纤通信中的分集接收等场合时，除了要求适当的输出功率比以外，尚需考虑输出端光场间的相位关系［1～3］。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。