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Comparing with existing solutions, new method can utilize generators' speed signal measured by wide area measurement systems directly and detailed model and parameter of power system components were not needed. After sphering measurement-data, ICA with maximal negentropy criterion was carried out to obtain feature matrix. By this means high-dimension data of multi-machine perturbed trajectories were reduced to lower dimensions, and coherent generator groups were identified by pattern recognition consequently. Simulation results of 36-bus system with 8-generator and planning northwest China 750 kV power grid show that noise signals and bad data can be eliminated. This method is accurate in identifying coherent generator groups.

与现有方法相比，这种方法不需要获得系统元件模型和参数，而是直接球化广域测量系统(wide area measurement systems，WAMS)提供的发电机电角速度信号，再利用最大负熵准则进行独立分量分析得到特征矩阵，将高维数的多机受扰轨迹数据变换到低维空间，通过模式识别得到分群结果。8机36节点系统和西北750 kV电网规划系统算例表明，该方法能有效消除噪音和坏数据的影响，准确识别出同调机群。

Methods: 24 SD rats were randomly divided into four groups: sham operation group, AD model group, AD model+fibroblasts transplantation groups, AD model+NT4-fibroblasts transplantation group. AD models were made by transecting bilateral fimbria-fornix.

24只雌性SD大鼠随机分为4组：假手术组、AD模型组、AD模型+成纤维细胞移植组和AD模型+NT-4-成纤维细胞移植组。

Ahead of the Naypyidaw meeting, Burma's commanders have made numerous attempts to persuade or coerce ethnic ceasefire groups to join the force under the command of the Burmese army, using talks, ultimatums or military build-ups around areas under the groups' control.

此次会议之前，军政府司令们多次试图说服或强迫停火民族武装团体加入缅军指挥下的边防卫队改编计划。缅军司令们，利用讲座，最后通牒，在民族武装区域周围军事集结高压等手段。

There are many different groups, and sociologists are interested in the effect that these groups have on people.

有很多不同的群组，社会学家对这些组在人们身上的影响感兴趣。

In the Aldol condensation of acetone with 4-nitrobenzaldehyde, two different hybrid secondary amine-functionalized mesoporous materials displayed enhanced catalytic performance in comparison to primary amine-functionalized materials. The possible reason is that the presence of organic functional groups with larger steric hindrance led to the enhanced catalytic performance of basic amino groups.

在对硝基苯甲醛和丙酮的羟醛缩合反应中，相对于一级胺功能化的材料，二级胺功能化的SBA-15展示了极大改进的催化活性，这可能是由于具有更大空间位阻效应的有机功能团的引人导致了碱性胺中心催化活性增强。

The major findings are:⑴During the intelligence test for the three groups of students, for half of the students or most of the students their scores on the all-including scale, the language scale and the performance scale all increased to various degrees;⑵From the analysis of the relationship between intelligence and reaction time, it is found that the result of this study confirms the existing views that there is a negative correlation between intelligence and reaction time, and the negative correlation is more evident when it is choice reaction time;⑶Different motor skills have different influences upon children with lower intelligence. Though the difference is not large, the average increasing percentages in the sample T tests for the three groups before and after the experiment show that the effect of open motor skill is the best, that of the synthetic motor skill or the open-closed is the better, and that there isn't a marked change in the closed motor skill trainees;⑷While analyzing the result of the experiment, it is found that the scores on the performance scale are higher than the scores on the language scale, especially in the open motor skill group, which tells us that the intelligence improving effect of physical training is realized to a greater extent through increasing their performance abililty.

研究结果显示：⑴相对于实验前测试结果，三个实验组学生的智力水平在实验后测试中不论是在全量表得分还是在语言量表、操作量表得分方面均得到了不同程度的提高；⑵从智力与反应时的相关分析可看出，本研究结果进一步验证了前人观点，即智力与反应时有显著的负相关，特别是与选择反应时有很强的负相关性；⑶不同运动技能对智力落后学生智力影响不同，虽然实验后各组间没有显著性差异，但经各组实验前后配对样本T检验及实验前后各项分数均值提高百分率可看出，开放式运动技能组实验效果最好，综合运动技能组次之，闭锁式运动技能组实验前后在智力测验量表得分上无显著性变化；⑷各组实验前后的操作量表分比言语量表分提高幅度更大，开放式运动技能组表现得尤其显著，这表明了体育活动对改善智力落后学生的智力水平，很大程度上是通过提高他们的操作能力来实现的。

METHODS: Fifty healthy SD rats were randomly divided into 5 groups(10 rats per group),including control group,hyperlipidemia model group,Mix oil group(2.5 mL/kg BW) and two apple seed oil groups:small dosage of ASO group(0.5 mL/kg/kgBW),large dosage of ASO 2.5 mL/kg.

50只SD大鼠随机分为5组（n=10），即正常对照组、高脂血症模型组、调和油对照组（2.5 mL/kg），苹果籽油小剂量组

We have synthesized 4,4'-dinitro-3 4''-dimethyl triphenylamine,(1), in 84% yield in an one-step condensation process between 3,4-dimethyl aniline and 4-fluoro-nitrobenzene. After the auto-oxidation of (1) and the subsequent hydrogenation of the nitro-groups, an AB2 type triphenylamine polyimide intermediate bearing two amine groups and one acid-anhydride group each on individual phenyl ring,{AB2 PI Intermediate}, was prepared successfully. The yields of the autoxidation and the hydrogenation steps are 81% and 90% respectively.

中文摘要本研究以3，4-二甲苯胺及4-氟硝基苯为原料，经一步骤缩合反应得到产率为84 %之4，4'-二硝基-3&，4&-二甲基三苯胺(1)，由(1)经自氧化法后再以氢化法还原硝基，成功地制备出带有二胺基与一羧基的三官能基之AB2型三苯胺中间体(AB2型PI中间体)，自氧化反应与氢化法的产率各为81%及90%。

Design in the part of bearing roller selecting , greatly reduced the quantity of bearing roller groups by the reasonably determine and optimization arrange of across block of bearing roller groups.

本设计在托辊组选型设计部分，通过对带式输送机托辊组间距的合理确定及优化布置，大大减少了托辊组用量。

Divide the rats into two groups: the test group taking bee milk and the control group and determine the weight,the ability of movement, MDA, SOD, the ph value of the plasma, the serum calcium synthesizing ability of ATP and changes of the liver and muscle glycogen in the exhausted rats of both groups.

灌喂蜂王浆的大鼠为试验组与对照组比较，测试二组在力竭运动时体重、运动能力、线粒体丙二醛、超氧化物歧化酶、血浆pH值、血乳酸、血清总钙ATP的合成能力以及肝、肌糖原的变化。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。