Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet - parameter on evaporator. fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio - parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping
本文的主要內容如下: 1 )對翅片管蒸發器結構特點進行分析,選取適當的微元控制體,就干、
濕和霜工況下對每個微元分別進行傳熱傳質分析,
基於經驗關系式確定霜的有關參數,對于霜工況下的霜生長建立模型,經適當假設,運用質量守恆、能量守恆和動量守恆方程建立適合動態模擬的蒸發器數學模型,為系統模擬奠定
基礎; 2 )對蒸發在大擾動下的開、停機過程,運用動態集中參數模型進行分析和計算,為更好地描述製冷系統運行的全過程奠定
基礎,同時也為製冷系統實現自動控制提供一定的理論
基礎; 3 )對蒸發器正常運行過程,運用動態分佈參數和參數間定量耦合的觀點來分析和計算,為更好地了解穩態工況下各點參數的變化情況及各入口參數對蒸發器動態特性的影響即蒸發器性能對各參數變化的敏感性; 4 )編寫翅片管蒸發器動態特性模擬計算程序,可以計算不同邊界條件和初始條件下的製冷劑熱力參數、空氣溫
濕度和霜厚度分佈場,實現對翅片管蒸發器在干、
濕和霜工況下的動態模擬。
Investigation on detergency, dispersing and wetting properties of alkyl polyglucosides
烷
基多苷的去污力和分散力及潤
濕力研究
Empirical formula of reinforcement depth of dynamic consolidation in collapsible loess foundation treatment
強夯法處理
濕陷性黃土地
基加固深度公式探討
The estimation methods of water requirement, and determination of basal crop coefficient and soil evaporation coefficient under the controlled alternative furrow irrigation in summer maize were studied and verified in the fifth chapter
( 4 )夏玉米田棵間土壤蒸發主要發生在灌后幾天表層土壤比較
濕潤的時期內,其中表層土壤含水率和葉面積指數是影響土面蒸發的兩個
基本因素。
The variations of sea ice in the arctic ocean are simulated by using a improved high resolution hibler dynamic - thermodynamic sea ice model during 1979 - 1998. the model is driven by surface atmospheric and oceanic forcing consists of geostrophic winds, surface air temperature, specific humidity, and longwave and shortwave radiative fluxes provided by international arctic buoy program ( iabp ). the simulated results show that arctic sea ice have noticeable seasonal and annual variability
利用一個hibler海冰熱動力模式,在改進了其熱力部分和改變模擬范圍以及提高解析度的
基礎上,以北極國際浮標計劃( iabp )提供的1979 - 1998年間逐日變化的日平均海平面氣溫場,
濕度場,長短波輻射場,風場,洋流場,海洋熱流量場為強迫場,模擬了上述20年間北極海冰的時空演變。
But emu oil is also the best product to soften beard stubble and prevent razor burn, calm bikini rash, prevent hangnails, brighten complexion, moisturize skin, add luster and vitality to hair, repair split ends, massage away sore muscles, soften hands, and it also helps improve ichthyosis, alopecia areata hair loss, epithelialized wounds, pain, swelling, stiffness, bruising, tendonitis, carpal tunnel, athletes foot, diaper rash, and pet skin problems
但鴯油並且是最佳的產品軟化鬍子發茬並且防止剃刀燒傷,鎮定比
基尼泳裝疹,防止hangnails ,照亮臉色,潤
濕皮膚,增加色澤和生命力來頭發,修理頭發分叉,按摩去疼痛肌肉,軟化手,和它幫助改進鱗癬,脫發癥areata掉頭發,並且epithelialized創傷痛苦膨脹,僵硬,挫傷, tendonitis腕骨隧道足癬尿布疹,和寵物皮膚問題。
Named after the hindu monkey god hanuman, these lanky, long - tailed monkeys are found in the humid forests, swamps, and even urban areas of india, pakistan, bangladesh, sri lanka, and myanmar ( burma )
這些體瘦尾長的猴子的名字源於印度教中的猴神哈奴曼,分佈在潮
濕的森林和沼澤中,甚至在印度,巴
基斯坦,孟加拉,斯里蘭卡和緬甸等國的城市地區也能發現。
If you need moisturizing, choose an oil - free moisturizer that contains humectants such as glycerin, na - pca and hyaluronic acid, et cetera ( see ingredients table in the feature article of cosmetics )
如果你需要保
濕,可以選擇含有甘油,羧
基酸,透明質酸等
濕潤劑的無油產品。
These products are new kinds of industrial and civil material, widely used in industry, agriculture, medical hygiene and daily life as : hygeian articles for sanitary napkins and baby diapers, surgery clothes and cap, respirator, kinds of wiping cloth, compound guibray, thermal materials and soon
該產品可應用於工業農業醫療衛生生活如:婦嬰衛生用品,手術衣帽及各種擦拭布,復合
基布,服裝保暖材料等
濕面巾生活及工業用各種擦拭布。
Dewpoint hygrometers provide an absolute measurement of humidity and therefore are essentially self-calibrating.
露點
濕度計可提供
濕度的絕對測量值,因此它
基本上是自動標定的。
The results indicated that : jaj could selectively stimulate the reprduction of bifidobacteria in vivo and inhibit the growth of e. coli which is a main parasitic basterium in human intestinal tract ; moreover, jaj could apprarently improve intestinal tract function. in tested group, the mice excreted smoothly and the faecal particles of mice were big and wet, but in control group, the faecal particles of mice were small and dry. lt was suggested that inulin may be the important effective component in jaj which promoted the reprduction of bifidobacteria in vivo. at last, the effects of ja on the bile salt resis tance of bifidobacteria were studied. the test proved that : deoxycholic acid na - salt ( dca - na ) had intensely toxical action on blm and bbm ; adding glucose and fructose in media could decrease the lexical action on bbm. but inulin and jap had not apparent effect
在通過單菌株檢驗和混菌檢驗確立了一種選擇性雙歧桿菌培養
基之後,進一步以健康昆明系小鼠為實驗動物,研究了菊芋在動物腸道內對雙歧桿菌的影響,動物實驗結果表明,菊芋汁在體內對雙歧桿菌有選擇性促進生長作用,而腸道中主要條件致病菌?大腸桿菌的生長受到抑制;菊芋中的菊糖成分可能對菊芋在體內選擇性地促進雙歧桿菌生長起了主要作用;此外,菊芋還具有明顯的整腸作用,同對照組相比,飼喂菊芋汁的小鼠排便順利,糞便顆粒大且
濕潤。
Quantitative analysis procedure of lignocellulose solid substrate including hemicellulose, cellulose and lignin, ignition method, volumetric method and soak extract method were utilized to study the changes of chemical components in lawn - grass and weeds during hydrothermal degradation with different conditions
摘要運用木質纖維素固體
基質半纖維素、纖維素和木質素定量分析程序等分析檢測了不同
濕解工況下草坪草和雜草主要組分的化學變化。
The going ( ie the surface of the race - track ) at newmarket is soft today
今天紐馬
基特的跑道
濕軟
Both high temperature and high humility are beneficial to formation and accumulation of nornicotine during yellowing
去甲
基煙堿含量烤后較烤前增加,而且變黃期高溫、高
濕均有利於去甲
基煙堿的形成和積累。
Comparing the moisture contents determined from the sensors with those from the standard oven drying method, the deviations was within 1. 0 % under the measuring range from 20 to 12 % w. b. these sensors have been commercialized
乾燥機作業時,此型水份計之量測值與烤箱法測定所得之標準值比較后,在12 20 %
濕基?圍,其誤差於1 . 0 %之內,此型水份計已商品化生產。
The influence of humidity was greater than temperature in thin - layer and it was similar in stems with leaves and stems
同時,擬合出了以濕度、溫度及紫花苜蓿濕基含濕量為自變量的數學方程式,並對它們與于燥速率的函數關系進行了總結。