chemical density 中文意思是什麼
chemical density
解釋
化學光密度-
Methods of testing plastics - chemical properties - determination of butyl rubber content of low density polyethylene compounds
塑料的試驗方法.化學性能.低密度聚乙烯化合物中丁基橡膠含量的測定 -
Chemical products for industrial use. determination of density of solids other than powders and cellular products. hydrostatic balance method
工業用化學製品.除了粉劑和泡沫製品之外的固體密度的測定.水靜態平衡法 -
Because it well reserves the chemical stability of inorganic glass, it has the following features : low density, low thermal conductivity, vapor impermeability, no water absorption, incombustibility, protection from mould and rat eating, high mechanical strength but easy to cut and able to bear all kinds of chemical erosions except the hydrofluoric acid
由於它完全保留了無機玻璃的化學穩定性，具有容重低導熱系數小不透濕不吸水不燃燒不霉變不受鼠嚙機械強度高卻又易加工，能耐除氟化氫以外所有的化學侵蝕。 -
Abstract : the effect of correction of self - consistent potential on electronic structure in simple cubic nanocrystal particles is calculated by means of the green ' s function method in the tight - binding approximation, taking only the nearest neighbor matrix elements into account. the numerical results show that the electronic energy spectrum is shifted, the chemical potential is not equal to the atomic energy level, the electronic density at each lattice point is changed, and the variation of electronic density at surface lattice point is the largest
文摘:在緊束縛近似下，只計及最近鄰的矩陣元，採用格林函數計算了自洽勢修正對簡立方納米晶體顆粒的電子結構的影響，發現電子能譜發生了移動，化學勢不等於格點原子能級，各格點的電子密度也發生了變化，其中以表面格點的電子密度變化最大。 -
The carbon nanotubes ( cnts ) are attractive materials for electrodes of supercapacitors due to their superb characteristics : chemical stability, low mass density, low resistivity, and large specific surface area
納米碳管導電性好、比表面積大、微孔集中在一定范圍內，從理論上講是製作超級電容器的理想材料。 -
It has noncombustible, non - toxic, corrosion resistance, bulk density of small, low thermal conductivity, chemical stability strong, and low moisture absorption rate, hydrophobic good, and many other advantages, is recognized superior insulating properties, thermal insulation, sound - absorbing materials with a wide range of purposes
它具有不燃、無毒、耐腐蝕、容重小、導熱系數低、化學穩定性強、吸濕率低、憎水性好等諸多優點，是目前公認性能優越的保溫、隔熱、吸音材料，具有十分廣泛的用途。 -
It measures the density of oxygen by detecting the life - span of the fluorescence quenching. the so - called fluorescence quenching is a kind of physics or chemistry process that the fluorescence material has chemical or physical reactions with certain substance is selected here. it has the advantage of good stability of fluorescence, long life span and the strong quenching effect
本課題光纖氧氣傳感器檢測系統是基於熒光猝滅效應的檢測機制，通過測定熒光壽命從而檢測氧氣濃度的，熒光猝滅效應所引起的熒光壽命具有很好的穩定性、猝滅效果以及系統使用壽命長。 -
Based on the principle of significant effect of soil fertility factors on forest growth, soil physical factors ( natural water content, bulk density, total porosity, capillary porosity, aggregate degree, coarse silt and physical clay ), chemical factors ( om. total n, alkali - hytrolyzable n, total p, humus and ha / fa ) and biological factors ( urease, acidphosphotase, invertase and microbes ) were selected as evaluation index system of soil fertility. applying principal component analysis, soil ifi of subalpine coniferous forest was calculated
從土壤物理、化學、生物學三方面出發，建立了川西亞高山針葉林不同演替階段土壤肥力評價指標體系，應用主成分分析，計算出不同演替階段土壤肥力綜合指標值（ ifi ） ，各演替階段大小順序為： 10年生雲杉林地跡地原始林地次生樺木林地30年生雲杉林地20年生雲杉林地50年生雲杉林地60年生雲杉林地40年生雲杉林地。 -
Meanwhile, the study also shows that the diversity of studied cave animals is inversely proportional to human population density and water quality ; and bio - diversity, to some extent, is proportional to soil fertility and amount of chemical fertilizer, but inversely when excessive ; the correlativity between bio - diversity and vegetation cover rate is not obvious, when ground vegetation is strongly interfered by human being ; the amount of diestrammena marmorata is proportional to the d iversity of plant, and inversely proportional to soil fertility, and in a way, to water quality ; and the correlativity between community and water quality and soil fertility, and between water quality and the amount of mosquito and fly, is not as good as expected. the author points out that diestrammena marmorata, bat, mosquito, fly, oreolalaxrhohostig metus ( or cudata ), and fish can be chosen as in
同時，研究還表明：調查洞穴的物種多樣性與人口密度、水質成負相關；在一定范圍內，物種多樣性與化肥施用量、土壤肥力成正相關，超過一定的值則成負相關;在人類對地表植被的高強度作用下，物種多樣性與植被覆蓋率的相關性不明顯;蚊蠅數量與土壤肥力基本上呈正相關;斑灶馬數量與植物種數呈正相關，斑灶馬數量與在一定水質范圍內與水質呈負相關，與土壤肥力呈負相關;群落數與水質和土壤肥力、蚊蠅數量與水質都不能表現較好的相關性;研究認為，可以選擇斑灶馬、蝙蝠、蚊蠅、紅點囊蟾（或有尾類） 、魚類等作為指示動物對洞穴環境進行監測。 -
The spectrum of a galaxy contains bright and dark lines that are determined by the galaxy ' s temperature, density, and chemical composition
一個星系的光譜中包含亮與暗的線，這是由星系的溫度、密度和化學成分決定的。 -
In the present dissertation, some properties of sodium tellurite glasses, including density, chemical durability, stability against crystallization and fragility of glass forming liquid are studied. the melting, evaporation and solidification of sodium tellurite glasses in low gravity during drop shaft experiments are observed. except this, the phase - separation of lead borate glasses under different gravity condition is also studied
本文亞碲酸鈉玻璃作為研究對象，系統探索了亞碲酸鈉玻璃的熔化條件，化學穩定性，玻璃抗析晶能力以及玻璃形成液體的脆性等問題，著重研究了na _ 2o - teo _ 2玻璃在落塔實驗中的熔化和氣化以及pbo - b _ 2o _ 3玻璃在落塔實驗中的分相，為解釋玻璃在不同重力條件下的熔化和分相等現象提供了理論依據。 -
Test method for physical - chemical properties of electrical carbon product. volume density
電炭製品物理化學性能試驗方法.體積密度 -
The flow characteristics, distributions of current density and chemical components, and the performance of these two different designs are calculated and compared. the flow and mass transport characteristics are analyzed in detail, which indicate that strong forced convection is produced in the interdigitated flow field, which consist of dead - end gas channel that force the gases through the porous electrodes. results of comparison show that forced convection induced by the interdigitated flow field in the diffusion layer effectively enhances mass transport of reactants and products, thus leading to a higher cell performance and the limiting current density
在傳統流道設計的pemfc中，反應物從流道到催化層的供應和生成物從催化層到流道的排出主要是以擴散為主，而在交叉梳狀流道設計中，以流動帶動的對流傳遞則占據了主導地位，而且這種以對流為主的傳遞機理大大提高了反應物和產物傳遞速率，從而有效地改善了電池的極限電流密度和極化性能等特性。 -
A method is proposed to construct a localized active functional space from the density matrix of a large system. the large system is partitioned into central and surrounding areas. the active functional space is mainly localized on the central area. it contains all basis functions centered at the central area and all the orbitals which consist of the basis functions localized in the surrounding area and interact with the basis functions in the central area to a certain extent. an integral number of electrons are involved in the localized active functional space which can be considered as a relatively independent subsystem in the large system and for which formally isolated quantum chemical calculations can be performed. the related program has been coded and is checked through calculating the number of 4
報道了從大體系的密度矩陣出發構造定域于指定局部的活性泛函空間的方法和程序。將大體系劃分為中心區和環境區，活性泛函空間包含中心區的基函數及與其有相互作用的環境區軌道，容納整數個電子，構成大體系的一個相對獨立的子體系，可以在其中進行獨立的量子化學計算。通過計算鑭系氯化物和水合離子的4 -
Manufacturer of precision instruments and controls including barometers, density monitors and level control for use in applications in chemical, petrochemical, food, medical, pharmaceutical, water and wastewater treatment, utility industries
-銷售非接觸紅外測溫儀環境測試儀音量計噪音計照度計溫濕度計一氧化碳測試儀電力基礎儀表數字萬用表交直流鉗形表。 -
And the no - isothermal structure can accelerate the breaking of gravity wave in mesospause, and the breaking of gravity wave is an important source of convection and small - scale waves. the propagation of gravity wave will affect the distribution of minor species. the breaking of gravity wave accelerates the downward transport of atomic oxygen, some smaller - scale structures appear on the horizontal distribution of atomic oxygen number density, and other chemical species are also affected due to the chemical reaction with atomic oxygen and the propagation of gravity wave
在重力波的傳播過程中，氫氧大氣成分的水平和垂直分佈均受到了不同程度的影響，以氧原子的響應最為明顯，而其中重力波破碎在氧原子水平分佈上的反應則是非線性重力波過程的一個重要表現；另外，分析顯示，重力波的非線性傳播對oh氣輝的峰值分佈由明顯影響，小尺度重力波的傳播有時會引起oh氣輝出現奇異的雙峰分佈，重力波的破碎現象也可以從對氣輝的觀測中反映應出來，這對利用氣輝觀測研究重力波傳播特性有非常重要的指示意義。 -
Chemical products for industrial use. determination of density of liquids. aerometric method
工業用化學製品.液體密度的測定.氣量法 -
Plastic hollow containner series products adopt high rigidity, anti - transmutation, anti - abrasion, anti - rupture, high - molecule and high density polyethylene as materials. though changing quality, pigmentation and using the international advanced equipments and moulds, puffing plastic hollowly to make up the shape. out products have the quality of high intensity, anti - acid alkali and anti - aging, and have been widely utilized in food, medicine, chemical, petroleum, pesticides and other industries for the external packaging
塑料中空容器系列產品採用剛性大耐蠕變抗磨損及耐環境應力開裂等優點的高分子量高密度聚乙烯作為原料，通過改性著色使用國際先進設備和模具，中空吹塑成型。 -
6. the density, chemical durability in water, and stability against crystallization of glasses in the na2o - teo2 system are explored and the fragility of glass forming liquid is studied
研究了nazo一teo :系統中不同成分對玻璃密度，化學穩定性，玻璃的抗析晶能力，以及玻璃形成液體的脆性等性能的影響。 -
All diodes have large reverse leak current density, which maybe caused by some reasons such as many ions are brought in course of evaporating metal on silicon surface of 6h - sic, chemical etch brings disfigurements such as burrs and dentate erodes as well as the rinse on surface of samples is not drastically accomplished
兩個肖特基二極體反向漏電流較大，估計原因為正面蒸發金屬時引入大量離子、光刻引入毛刺和鉆蝕等缺陷、金屬與樣品粘附能力差及樣品背面歐姆接觸制備好后正面清洗不充分等。
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