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Lots of factors,such as the virus infection, the acarid and dust in the room, the blackbeetle, the tobacco smoke, the air pollution, the chemical stimulation and the like , can trigger bronchial asthma. The contamination of suspending particulates with the diameter less than 2.5 micron in the atmosphere is the main reason that makes mortality ascend,for the contamination can aggravate the hypersusceptibility which embitter more and more people .

支气管哮喘也称哮喘病,病毒感染、室尘螨与蟑螂等变应原触发因素,以及烟草烟雾、空气污染、化学刺激等均可引起发病,大气中直径不足2.5微米的悬浮微粒污染物是导致死亡率上升的因素,微粒污染会加剧人体过敏反应,全球遭受过敏之苦的人数正与日俱增。

The traditional smoke theory considers that the smoke particles will sedimentate due to gravity after forming of smoke screen, and then the particles reach a final sedimentation velocity thanks to the effect of air-resistance and buoyancy, and the equation can be solved by the Stokes pellet resistance theory and often used to analyze the performance of smoke.

传统烟幕理论认为,在烟幕形成后,烟幕微粒受到重力的作用开始沉降,同时受到空气阻力和浮力的作用,最后使烟幕微粒达到终端沉降速度,这个速度方程可以通过Stokes圆球阻力理论求得,并被用来分析烟幕的性能。

Due to traditional particle impact noise detectionsystem for remainder detection with low precision,high leave out rate and wrong judgment rate,a remainder auto detecting method based on wavelet analysis was preseated.A PIND system for space relay with self-owned intellectual property rights was designed.

针对以往多余物微粒碰撞噪声检测系统中存在检测精度低、误判和漏判率高等问题,提出一种基于小波分析的多余物自动检测方法,研制了具有自主知识产权的航天继电器微粒碰撞噪声检测系统。

Results There were almost no changes in pH and the contents of danshensu、protocatechuic aldehyde in compatible solution within 6 hours.

结果注射用丹参与0.9%氯化钠注射液、5%葡萄糖注射液配伍后溶液6h内pH值变化较小;配伍液不溶性微粒数远远高于原注射液的不溶性微粒数(P.01);主要成分丹参素钠和原儿茶醛的含量基本无变化。

Acetone and SDS have been added to CH2CL2 solution containing PLA. After sonification of 20 minutes, this polymer solution has been dropwisely added to aqueous solution containing 8-14% Pluronic F-68 surfactant and stirring with homogenizer (25000 rpm). With rota-evaporator to remove solvent, polyester nanoparticles possessed average size between 61 and 64 nm. Other combinations of surfactants, such as : SDS and PVA, PAA and SDS, used in preparation of nanoparticles of polyester, resulted in much larger particles compared to above.

丙酮和十二烷基硫酸钠加入溶於二氯甲烷的聚乳酸中,并经超音波振荡20分钟,所产生的高分子微粒溶液再滴入以均质机搅拌(25000 rpm)含有(8-14%) Pluronic F-68界面活性剂溶液中,经减压浓缩除去溶剂后,奈米聚酯微粒平均粒径大小为61-64 nm,其他界面活性剂组合,包括十二烷基硫酸钠与PVA、PAA与SDS,其产生聚酯平均粒径皆大於此。

Then the machine bombards the molecule with a beam of fast atoms, which knocks a stream of charged ions off from the molecule

然后,那台机器用一束快速运动的原子,轰击了那个微粒,从微粒中撞击出一股带电的离子。

Coalescing filter elements will also remove particulates at the same efficiency as particulate type elements of the same grade.

凝聚过滤元件也将删除微粒作为微粒在同一职系的类型元素同样的效率。

A new niching is formed by utilizing the algorithm which uses the hill valley function to judge whether the niching subswarms are produced and merged .

研究了基于微粒群算法的多峰函数寻优问题,提出一种基于峰谷函数的小生镜微粒群算法。

Starting in September, the Bicycle Trade Association of Canada and Canadian Crime Stoppers are launching a nationwide bicycle identification program using microdot technology, where a PIN number is encoded on a data dot the size of a grain of sand.

自9月开始,加拿大的自行车贸易协会和加拿大犯罪制止协会发起一个全国性自行车辨识计昼,使用微粒技术,是一组PIN码被编译密码在一粒沙粒般大的微粒上。

The metabolism of AQ4N can actually occur in human tumor microsomes, which provide strong evidence for intratumoral turnover of prodrug in brain tumors.

AQ4N确实可以在肿瘤微粒体内进行转化,并且在原发性及转移性脑肿瘤内有差别,为前药肿瘤微粒体内的药物转化提供了一个很好的证据。

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