level density 中文意思是什麼
level density
解釋
電平密度-
Some tendency of tn5gusa5 transposition were found that all preferred sites of tn5gusa5 in xcc 8004 genomic dna are in at - rich regions ; target sequences of tn5gusa5 have some features that the probabilities of guanine and cytosine are high respectively at the head and tail base of target sequence ; the level of gene transcription does not influence insertion density of tn5gusa5 significantly
結果表明， tn5gusa5插入位點有一定的規律性： tn5gusa5在xcc8004基因組上傾向于插入低gc含量（ 50左右的區域插入密度最高）區段；插入位點的靶序列有一定的特異性，在靶序列的首位鳥嘌呤出現的幾率高，而在靶序列的末位胞嘧啶出現幾率高； tn5gusa5的插入密度與該區段基因的轉錄水平無明顯關系。 -
We have calculated one - and two - photon absorption cross sections of the lowest excited states of a series of molecules combined with benzene, stilben, thiophene as center attached with amine, diphenylamine, diethylamine as electron - donor and nitryl as electron - acceptor ; the effects of molecular length, n center and electron - donor on two - photon absorption cross sections have been studied and all calculations have been carried out using the density functional theory at an ab initio level. it is found that the molecular length and the one - photon absorption intensity are quite strongly c orrelated factors, and that a corresponding correlation for the two - photon absorption is decreasing. it is also found that a most crucial role for the two - photon absorption is played by the n center
我們分別以苯、二苯乙烯、噻吩為中心，氨基、二苯氨基和二乙氨基為電子給體，硝基為電子受體組合形成的分子為研究對象，在從頭計算的水平上用密度泛函理論計算了這些分子在低激發態下的單、雙光子吸收強度，重點研究了分子的長度、中心和給體的供電子能力對分子單、雙光子吸收的影響。研究結果表明，分子長度與單光子吸收強度之間有密切關系，而在雙光子吸收中這種關系較弱；中心在雙光子吸收中具有重要的作用；在中心和受體一定的情況下，增加給體的供電子能力，可提高雙光子吸收強度。 -
Gs115 can grow in a high density and produce heterologous proteins by secretion, which are in a high - level and easy to be purified
其可高密度生長，外源蛋白呈分泌性表達，具有外源蛋白產量高、純化相對容易的優點。 -
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。 -
Standard test method for bulk density of level paintbrush filaments
油漆刷絲分佈密度的標準試驗方法 -
The hard process is included in a natural way, which offers the opportunity to calculate the parton spectra and parton density which aie closely related to the forinatioi1 of quark gluon plasma. the strict calculation is performed on the parton level, however, hadrons are finally observable particles
而pomeron與remnant之間的關聯，以及pomeron之間的關聯，則通過補償夸克（或感應夸克）來實現? ?每當一個海夸克或一個反夸克從真空中激發出來作為pomeron的色弦端點時，它的反粒子也從真空中激發出來，進入到相鄰的remnant中。 -
The density varies with the temperature, and g with the latitude and elevation above sea level.
但密度是隨溫度變化的，而g則隨海拔高度和地理緯度變化。 -
In this paper, high - order accurate weighted essentially non - oscillatory ( weno ) schemes are investigated and their applications in hyperbolic conservation laws are discussed. based on this, a new weno difference scheme which based on dispersion - relation - preserving relation is developed, and representative test cases with this scheme for computational aeroacoustics ( caa ) problems has been implemented and compared in order to test capability of wave capturing ; in addition, weno schemes generally do not converge at high order in the presence of contact discontinuity of euler equations, so a conservative front tracking technique coupling weno schemes and level set method to simulate the translating density profile is presented here, and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy
本文研究了高階精度加權基本無振蕩（ weno ）格式及其在雙曲守恆律方程中的應用，在此基礎上作了兩個方面的工作：一是針對高頻聲波問題構造出一種基於保色散關系（ drp ）的weno有限差分格式，並對計算氣動聲學（ caa ）問題的代表性算例進行了大量數值實驗，比較了該格式捕捉波數的能力；另外，針對高階weno格式在處理euler方程的接觸間斷時精度有所降低的問題，研究了利用界面追蹤技術levelset方法和高階激波捕捉weno格式相結合的一種守恆追蹤方法，並且給出有代表性的密度滑移面問題的算例，得到一致高階精度的數值模擬結果。 -
In this thesis, we demonstrate the study of si - based light emitting materials and its importance in si - based photonics integration. we discussed mainly the gain, differential gain, threshold current of si - based quantum - dot laser and the dependence of threshold current on temperature from discrete energy level of three - dimension confined quantum - dot and state density distribution of 5 - function
本文闡述了si基光發射材料的研究進展及它在硅基光電子集成中的重要地位，從三維受限量子點的分立能級和函數狀的態密度分佈入手，著重討論了si基量子點激光器的增益、微分增益、閾值電流及閾值電流的溫度特性。 -
The hybrid density functional theory at ab initio level was applied to study solvent effects on geometrical structures, charge distribution, and solvatochromic shifts of 4 - nitro - buta - 1, 3 - dienylamine molecule
摘要在從頭計算的水平上，利用雜化密度泛函理論研究了溶劑對4 -硝基1 ， 3 -丁二烯基胺分子的幾何結構、分子內的電荷分佈和電荷轉移態的能量漂移的影響。 -
Manufacture and worldwide sales of non - contact level measurement, density measurement, weight measurement process control equipment
產品涉及視頻領域音頻領域廣播測試系統數字電視領域等。 -
Abstract : adopting the serum - free and animal - source - free medium domestication express cell efficiently, setting up to express system efficiently, suspending culture cell, can raise the cell density in the scale turn the production, strengthen the cell vitality, control cell to propagate level, extension cell culture period, increase the target protein of yield, raise product quality, simplification of produces technics, reduce production cost, then raising the efficiency that the scale turns culture
提要：採用無血清無動物組分培養基馴化高效表達細胞，構建高效表達系統，懸浮培養細胞，可以在規模化生產中，提高細胞密度，增強細胞活力，控制細胞增殖水平，延長細胞培養周期，增加目標蛋白的產量，提高產品質量，簡化生產工藝，降低生產成本，進而提高規模化培養的效能。 -
A co2 laser with the optimized resonator is made and to be proved by experiments. this dissertation focus on the following problems : the kinetics process of the cvl and the co2 laser, the rate equations for the laser level population, electron temperature and electron density
本文的重點是：闡述清楚銅蒸汽激光和二氧化碳激光的動力學過程，定量描述激光能級的粒子數速率方程、電子溫度和電子密度等速率方程 -
The entropy or number of states of system or subsystem are closely related to interaction of particles and energy level distribution, therefore, to study the temperature dependence of the specific heat may supply some important and useful microscopic information which may play an important role in understanding electronic structure, density of state, phonon spectrum etc. the specific heat measurements at low temperatures also play important roles in the finding of the third law of thermodynamics, the quantum theory of solid and bcs theory for superconducting etc. moreover, specific heat measurements help us to understand the different kinds of phase transitions ( such as : structural phase transition, magnetic phase transition, superconducting phase transition etc. ) and the scaling behavior near the critical point
系統、子系統的熵或微觀狀態數與微觀粒子間的相互作用及能級分佈密切相關，因此研究比熱與溫度的依賴關系能夠提供被測量系統許多極其有用的微觀信息，對理解固體的電子結構、電子態密度、聲子譜等起著十分重要的作用。低溫比熱的測量和研究對熱力學第三定律、固體量子理論和超導bcs等理論的建立起到了積極的推動作用。比熱研究還有助於認識各類相變如結構相變，磁性相變，超導相變等及臨界點附近的標度規律。 -
Develops, manufactures and distributes level, pressure, flow and density field mounted sensors, with associated monitors and systems
-生產製造航空儀表及傳感器電子衡器汽車部件質量流量計壓力測試儀器彈性敏感元件等。 -
It was indicated that the density of the filled soil and the drainage condition of the slope were the major factors controlling the deformation and failure of slope caused by the rise of ground water level
分析結果表明：填土密度和斜坡排水條件是影響斜坡因地下水位上升而變形和破壞的重要因素。 -
In this paper, a numerical simulation is conducted, which is based on the test data of the model experiment of sloping ground with the help of the marc program. when the bearing capacity characters of level ground and the foundations adjacent to or above slopes are analyzed, the effect is considered, which includes deformation moduli, density, poisson ratio, angle of internal friction, stress - strain relationship, slope angle, relative distance from the edge of slopes and relative depth of footings
本文利用斜坡地基模型試驗的試驗數據，用marc軟體進行了斜坡地基模型試驗的數值模擬，分析了平地地基、臨坡地基和斜坡地基的承載力特性，研究了變形模量、容重、泊松比、內摩擦角、應力應變特性、斜坡坡度、基礎的相對坡頂距及其相對埋深等因素對斜坡地基承載力性能的影響。 -
The inner factors refer to the mechanical behavior such as the rock type, density, construction parameter, etc. and the outer factors refer to the foundation condition, geological condition, valley shape, rise and fall of water level, seepage due to respiration
內因是指堆石料的巖質巖性、密實程度、施工參數等組成壩體的各種力學性質；外因是壩址所處的基礎條件和兩岸的地形地質等條件、河谷形狀、水庫水位的變化、降雨浸潤等因素。 -
The growth of extraradical hyphae and hyphal density in soil were decreased significantly at high p level, however the growth of am fungus stimulated by moderate p supplied into soil ( 50 mg - kg - 1 )
高磷水平下， am真菌的菌物生長量和土壤中的根外菌絲密度明顯減少，而適當施磷（ 50mg ? kg ~ （ - 1 ） ）對am真菌的生長有刺激作用。 -
The energy density of the spot was 100 times the typical saturation level of the vidicons
光點的能量密度為光導攝像管典型飽和電平的100倍
分享友人