Surface tension effects on condensate retention angle and condensation heat transfer coefficient of carbon dioxide were studied.

綜述了水平低翅片管外凝結(jié)傳熱的基本模型，闡述了二氧化碳制冷劑的物性特點(diǎn)国产女精品网站91，討論了表面張力與凝液滯留角及二氧化碳管外凝結(jié)換熱系數(shù)的關(guān)系欧美女人兽牲交，分析了翅片密度、環(huán)形翅片管尺寸對(duì)翅片效率3344e国产在线观看、滯留角日本三级网站、凝結(jié)換熱系數(shù)以及傳熱增強(qiáng)比的影響，優(yōu)化了外翅片管的齒高與齒距日韩久久精品麻豆出品AV，并求得相應(yīng)的強(qiáng)化傳熱增強(qiáng)比外国免费黄色网站。

By using the "mechanical wounding"experimental system estabilished by us, and light- and electron microscopy, autoradiography and radioisotope technique, immuno-fluorescence localization, homologous clone and RACE technique, in situ mRNA hybridization and ELISA et al., we investigated the relationship between the transportation of exogenous JA and the secondary laticifer differentiation, the relationship between the producton and accumulation of endogenous JA and the laticifer differentiation from cambia, and the effect of appling exogenous jasmonates on the natural rubber production.

利用我們建立的機(jī)械傷害誘導(dǎo)乳管分化的實(shí)驗(yàn)系統(tǒng)，采用光學(xué)顯微鏡和電子顯微鏡技術(shù)美女让我捅、同位素示蹤和放射自顯影技術(shù)人人操天天射人人人玩、免疫熒光定位技術(shù)、同源克隆和RACE技術(shù)国产一级毛片无码aaaaaa、mRNA原位雜交和ELISA等技術(shù)在线免费观看黄色一级视频，研究了外源茉莉酸在橡膠樹體內(nèi)的移動(dòng)及其對(duì)維管形成層分化次生乳管的誘導(dǎo)效應(yīng)亚洲一级婬片A片AAA毛片to、內(nèi)源茉莉酸與乳管分化的關(guān)系以及茉莉酸類物質(zhì)對(duì)天然橡膠產(chǎn)量的影響。

In the case of film condensation, the total heat transfer coefficient of B30 circularly-grooved tube can increase 44%~ 95% compared with smooth tube; for TA2 circularly-grooved tube, it is 51%~64%. And the relevant flow friction inside the tube obviously increases.

在膜狀凝結(jié)條件下公侵犯人妻中文字幕在线视频，B30波槽管的總傳熱系數(shù)比光管的提高44％～95％亚州AV无码专区在线电影；TA2波槽管的總傳熱系數(shù)比光管的提高51％～64％；而相應(yīng)的管內(nèi)冷卻水流動(dòng)阻力也有明顯的增加H视频在线看一区。

Simulation on the inner flow field of a horizontal tubes of falling film evaporator in a refrigeration system was performed using two-phase flow model VOF in FLUENT,and the influence of different tube arrangements on the flow field was examined.

采用FLUENT兩相流VOF模型国产91精品肉色丝袜，對(duì)制冷系統(tǒng)中水平管降膜式蒸發(fā)器內(nèi)部流場(chǎng)進(jìn)行了數(shù)值模擬，研究了蒸發(fā)器內(nèi)部蒸發(fā)管的不同布管方式對(duì)蒸發(fā)器內(nèi)部流場(chǎng)的影響免费Av青草网站。

Experimental results indicate that the B/A value greatly affects the internal Nusselt number and friction factor of the twisted tube because the parameters decrease with the increase of B/A and S/d values, more rapidly with the former, and that the Nusselt number and friction factor of the twisted oblate tube increase respectively by 30%~150% and 20%~50%, as compared with those of the smooth tube at the same Reynolds number and Prandtl number.

實(shí)驗(yàn)結(jié)果表明：高扭曲比螺旋扁管的管內(nèi)努塞爾數(shù)和阻力系數(shù)均隨B/A值和S/d值的增大而減小毛片视频免费观看高清在线，但隨B/A值的增加而減小得更快，B/A值對(duì)高扭曲比螺旋扁管的管內(nèi)傳熱與流阻性能影響更大国内乱伦视频；在相同雷諾數(shù)和普朗特?cái)?shù)下，高扭曲比螺旋扁管管內(nèi)的努塞爾數(shù)為光滑管的1.3~2.5倍人妻无码亚洲；阻力系數(shù)為光滑管的1.2~1.5倍久久久久久久精品国产免费…。

Or, rather, it employs two ring-shaped half-pipes that rotate with respect to one another (the lower one remaining fixed while the upper one revolves along with the building). The joints between the half-pipes have rubber seals to stop the contents leaking, and each half-pipe has a vertical pipe connected to it, to introduce or dispose of the fluid concerned.

或者更確切的說(shuō)，它使用了兩根彼此旋轉(zhuǎn)的環(huán)形半管（當(dāng)上面那根獨(dú)自圍著建筑旋轉(zhuǎn)的時(shí)候毛片大全免费，下面那根余下的部分被固定）女人张开腿男人桶免费官网，兩根半管的接頭有橡膠防止泄漏，每根半管都有一根垂直管與之相連激情偷乱人伦视频，引入或排出附著的液體高清国语自产拍AV。

The real shape of U tube was considered, and heat transfer model of underground vertical buried tube heat exchanger was built with math methods and numerical analysis software. The soil temperature distributions around the buried tube under different working conditions were solved by programming.

考慮U型管的實(shí)際形狀，借助數(shù)學(xué)方法和數(shù)值分析軟件AV片网站在线观看com.，建立了地下垂直埋管換熱器傳熱模型美女黄页网站国产在线观看，并通過(guò)編程求解數(shù)學(xué)模型，得到了系統(tǒng)短期運(yùn)行不同工況下埋管周圍土壤的溫度場(chǎng)分布情況激情女人综合网。

Objective To study the feature of the incisor nerve canal and its relation to the mandibular canal and mental canal so as to offer a reliable anatomical data for the distric operation.

目的 研究國(guó)人切牙神經(jīng)管的位置及下頜管小h片在线播放免费网站、頦管的關(guān)系，為臨床手術(shù)提供解剖學(xué)數(shù)據(jù)欧美性爱兔费网站。

The thyristor and stator winding have different topology architecture when the inductionmotor is controlled by the thyristor. Based on the fault characteristics of the inductionmotor, the current through the thyristor and the stator winding are studied when theshort-circuit or open-phase fault is occurred. The reasonable protection method based onthe different topology architecture is given in the thesis, and the induction motor and theover-current of the thyristor are reliably protected.

在分析異步電動(dòng)機(jī)一般故障特性的基礎(chǔ)上18岁一下禁止观看的网站，針對(duì)采用晶閘管對(duì)異步電動(dòng)機(jī)進(jìn)行節(jié)能控制時(shí)晶閘管與異步電動(dòng)機(jī)繞組所形成的不同拓?fù)浣Y(jié)構(gòu)，詳細(xì)分析了在發(fā)生短路高潮网址、斷相等各種故障時(shí)晶閘管與異步電動(dòng)機(jī)繞組中通過(guò)的電流99热这里，為實(shí)現(xiàn)晶閘管的過(guò)流速斷和異步電動(dòng)機(jī)的可靠保護(hù)提供合理的保護(hù)判據(jù)。

Objective: To assess the sealing ability of three root canal sealers by a new quantitative method using glucose.

目的 ：用葡萄糖定量法檢測(cè)根管微滲漏的模型評(píng)價(jià) 3種根管封閉劑封閉根管的能力人人上人人肉人人插。