压低

Therefore,the application of space-time adaptive optimization method to active acoustic homing torpedo is studied, and the conventional method is improved by restraining the side lobe reverbereration and main lobe reverberation with self Doppler null method.

在此基础上研究了空时最优处理方法在主动声自导鱼雷中的应用，通过压低旁瓣减少旁瓣区混响和自身多普勒零陷抑制主瓣混响等措施对传统方法进行了改进。

Alix lowered his voice confidentially :"He's in Paris, but he doesn't come here any more."

阿利克斯压低了嗓门，用透露机密的口吻说道："他在巴黎，可是他不再到这儿来了。"

The results were analyzed with the statistical software package spss10.0.results ①between two groups,there was no significant difference about the affection of age,sex and the destribution and location of aneurism on prognosis outcome(p＜0.05).however,the grading of hunt hess and fisher in group a(gos＞3) showed significantly lower than in group b(gos≤3),（p＜0.001）;② there was no significant difference in the frequency of heart rate, st elevation, st depression,t wave inversion,u wave inversion and ventricular arrhythmia(p＞0.05).the frequency of abnormal q wave, supraventricular arrhythmia and the ecg scores in group a showed significantly lower than in group b （p＜0.05,p＜0.001）;③the ecg scores was the most powerful multivariate risk stratified(ecg ≥5 vs ecg＜5; p=0.002,or=0.010,95%ci 0.001~0.173).conclusion the ecg score, a new and simple method of semi quantification, was a powerful risk predictor for patients with sah.

应用spss10.0 统计包分析结果。结果①在年龄、性别、动脉瘤生长部位影响动脉瘤性sah预后方面，两组病例无明显差异（p＞0.05）。而按sah后hunt hess分级和fisher分级，gos＞3病例的分级要明显低于gos≤3的病例的分级（p＜0.01）；②两组在心率、st段抬高、st段压低、t波倒置、u波倒置、室性心律失常出现的频率无明显差异（p＞0.05）；在异常q波和室上性心律失常出现频率及心电图评分方面，gos＞3的组别明显低于对照组（p＜0.05，p＜0.001）；③心电图评分是sah患者预后最显著影响的变量（p=0.002，or=0.010，95%的可信区间0.001~0.173）。结论心电图评分作为一种新型、简便的半定量方法，能有效的预测蛛网膜下腔出血病人的预后。关键词：心电图；预后；评分；蛛网膜下腔出血

According to the malaria statistics in 1989,the number of malaria cases,malaria incidence and positive parasite rate in native resident fever cases,and the number of malaria loci decreased by 20%,21.79%,35.85% and 31.06% respectively in comparison With that in 1988·In addition,the malaria transmission peak dropped down·All these achievements are due to strengthened antimalaria measures,especially in the areas where malaria incidence was higher.

1989年全省疟疾发病人数，发病率，当地发热病人血检疟原虫阳性率和疟疾病灶点数分别比1988年下降20.4%、21.79%、35.85%和31.06%，压低了9月份的发病高峰。

Hereby Pa electric energy direct conversion for lightenergy...PN knot add anti Hsiang voltage,Minority carrierdifficult to infusion,Therefore No, aglow..This kind of availoneself of infusion style electricity to aglow principium make the crystal diode of call led,Appellative LED?

由于LED工作电压低（仅1.5-3V），能主动发光且有一定亮度，亮度又能用电压调节，本身又耐冲击、抗振动、寿命长（10万小时），所以在大型的显示设备中，目前尚无其他的显示方式与LED显示方式匹敌。

Pn knot add antihsiangvoltage,minority carrierdifficult to infusion,therefore no, aglow..this kind ofavailoneself of infusion styleelectricity to aglow principium make the crystal diode of callled,appellative led led aglow color concerned in luminosity andfabricator led material ho craft,currentlywidelyused have hung , green , lan three plants..based on led operating tensions low (littlesless than 1.5-3v),neng initiative aglowand has at all events brightness,brightnessandemployable voltageaccommodate,in itself and endure buffets ,shocksresistances moves , ages long ( 10 wan hour),forasmuch in man- size display device,currently shang free frommore bring out mode and led bring out mode is equal to.

由于led工作电压低（仅沈阳led显示屏-3v），能主动发光且有一定亮度，亮度又能用电压调节，本身又耐冲击、抗振动、led荧光电子广告板长（10万小时），所以在大型的显示重庆led灯中，led荧光电子广告板尚无其他的显示方式与led显示方式匹敌。

Methods Among 123 patients suffered from actue inferior myocardial infarction,45 with ST segment depression in leads V1～6 and 78 without precordial ST segment shift were evaluated and compared.

对45例合并胸前广泛导联(V1～6)ST段压低的病人和78例不合并胸前导联ST段压低的急性下后壁心肌梗塞患者进行临床和心脏超声检查的比较研究。

Objectives:To analyze the stress distribution in the periodontium of the maxillary left canine under different intrusion loads.

目的：分析压低加载变化对Von mises应力分布的影响，探讨尖牙压低过程中的力学机制，为临床正畸治疗提供客观的理论依据。

During the fracturing for low pressure and low permeability gas reservoirs, there are some main problems in conventional hydroxypropylguar - organic boron cross-linking system: Firstly, the water-lock damage to low pressure and low permeability gas formations by filter liquor; Secondly, the reason for alkali-sensitive damage in alkali-sensitive reservoirs is that conventional hydroxypropylguar - organic boron cross-linking fracturing fluids were cross-linked under alkaline environment, while the permeability of reservoirs is reduced greatly; Thirdly, the formation pressure is low, and the energy of flow back is not enough, at present, the main measure in oil fields is "injecting with liquid nitrogen", but this technique increased the cost of fracturing, making great troubles in operating, and leaving the liquid nitrogen also is a big problem.

在低压低渗透气藏的压裂改造过程中，常规羟丙基胍胶-有机硼交联压裂液体系存在的主要问题，一是压裂液滤液对低压低渗透气层造成的水锁损害；二是常规羟丙基胍胶-有机硼压裂液是在碱性条件下交联的，对碱敏性储层造成碱敏损害，降低储层渗流能力；三是地层压力低，压裂液返排能量不足，当前各油田采取的措施主要是&液氮伴注&技术，但是&液氮伴注&技术增加了压裂的费用，而且液氮存放也存在较大问题。

R# m, d! d% g "When he's throwing the ball down, his sinker's real effective," Yankees catcher Wil Nieves added."He was down today and was real fun to catch."

C。 ^* B- n'？ r5 「他把球压低时，他的伸卡球非常有威力」，洋基捕手尼维斯Wil Nieves补充说，「他今天球有压低，而且接起来非常爽。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。