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A theoretical model was set up through introduction of moving heat source principle and a closed form analytical solution was obtained using Green's function under the third boundary condition.

在极端环境条件下,当温度低于低熔点金属的熔点时,低熔点金属或者合金可能发生凝固,这种情况不但使强化换热效果减弱,甚至可能恶化整个散热系统。

3 All iron components which are installed in the open air and can be easily abraded should be processed by zincification with the process of hot immersed zinc.

3.3.3.9.7.3 采用热浸锌工艺对安装在露天并容易发生腐蚀的所有铁部件进行镀锌处理。

The gelation mechanism of HPAM and AlCA was studied through FTIR analysis and rheological measurement.

首次发现:HPAM-AlCA热稳定性不理想,其主要原因是HPAM与AlCA的络合交联键易发生断裂。

Survivorship between sexes differed seasonally at one site, based on differences in seasonal activity patterns and differential exposure to predation by mountain lions, Puma concolor.

日前发生在青岛一家大型门户网社区里的一次宠物交易引起了不少网友热议,记者通过调查,接触到了一个新群体——爬行动物爱好者。

After treatment the therapeutic effect, the defervescent time, and the changes of ALT,BUN before and after treatment and adverse reactions were observed for both groups.

观察2组用药后临床疗效、退热时间、用药前后血丙氨酸氨基转移酶、尿素氮的变化及不良反应发生情况。

Five of them have received RFT of Gasserian ganglion with recurrent TN after years.

其中有五位在接受三叉神经节高频热凝疗法后数年,发生三叉神经痛复发的情形。

Amino-6-nitrobenzodifuroxan was prepared through a three-step reaction from starting material 3, 5-dinitrobenzoic acid:(1)3, 5-dinitroaniline (1) was synthesized from the reaction of DNBA and hydrazoic acid in inert solvent 1, 2-dichioroethane through Schmidt rearrangement with yield of 89.6%;(2) 1 was subjected to nitration to prepare pentanitroaniline (2) with yield of 51.1%;(3) The title compound was prepared from 2 and sodium azide in acetic acid through denitrogenation and then Schmidt rearrangement with yield of 86.8%, m.p.204℃~206℃.

以3,5-二硝基苯甲酸为原料经过3步反应合成了7-氨基6-硝基苯并二氧化吠咱:第1步反应,在二氯乙烷惰性溶剂中,DNBA与叠氮酸反应并发生Schmidt重排反应生成3,5-二硝基苯胺(1),产率89.6%;第2步反应,1在含100%硫酸的硝硫混酸中硝化生成五硝基苯胺(2),产率51.1%;第3步反应,2与叠氮酸反应,不经分离直接进行热解脱氮、Schmidt重排反应,得到目标化合物, m.p.204℃~ 206℃,产率86.8%。

By designing several types of solution elevation tubes with lunate channel, the heat transfer and the elevation effect is studied experimentally.

本文设计了多种弦月形通道热虹吸提升管,并对其进行了溶液提升和发生效能的测试。

Short-circuit,overload,resistance of line or cable's connection overlarge,which cause line overheat,making sparkle and electric arc.

文摘:介绍了配电线路在运行中发生短路、过负荷以及导线或电缆接头处接触电阻过大而引起导线过热、产生火花和电弧引起火灾事故的原因。

The welding nugget happened to dynamically recrystallize and the refined crystal grains were obtained and the majority of Mg_2Si particles dissoluted due to the intensive mechanical stir and higher high temperature. In the thermal-mechanical affect zone that was heated under the recrystallized temperature, the crystal grains were elongated due to the mechanical stir and Mg_2Si particles partly dissoluted and the others grew. In the heat affect heat without the mechanical stir, to some extent, both of the crystal grains and the majority of Mg_2Si particles grew.

焊核区受到强烈机械搅拌作用和加热到较高的温度发生动态再结晶,得到细小等轴晶组织,Mg_2Si相以溶解为主;热机影响区加热温度低于再结晶温度,在机械搅拌作用下晶粒由于塑性变形而伸长,Mg_2Si相部分溶解,部分长大;热影响区仅受加热影响,晶粒有一定程度长大,Mg_2Si相以长大为主。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。