費密分佈 的英文怎麼說
中文拼音 [bìmìfēnbù]
費密分佈
英文
fermi distribution-
From the aspect of area distribution, problem of water environment and factors of population, society and economy do n ' t coordinate with each other : in those areas which are rich in water, there are serious pollution and waste ; in those which are lack of water, economy is relatively behind the times ; in those where there is less lack of water, high population density faces the water resource with great potential pressure
水環境問題與人口、社會、經濟等因素在地區分佈上很不協調，如水資源豐富地區，水污染與水浪費十分嚴重；缺水地區，經濟相對落後；缺水程度低的地區，人口密度較高，使水資源存在巨大的潛在壓力。在影響水環境的相關因素中，人口因素的作用十分突出，主要表現在兩個方面：一是地區人口數量與分佈的集中程度是決定水資源壓力及相關水環境問題的真下因素；二是人口素質與水管理水平之間具有一定的正相關關系。The main work can be summed up as follows : firstly, we studied the thermal - field properties of vcsels, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of vcsels, and then studied the influences of the oxide - confining region with different position or thickness, and the different sizes of the gain - guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. thirdly, we realized the coupling of electricity, optical and thermal - fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, fermi levels and optical - field
具體工作可以概括如下：首先，研究了vcsel的熱場特性，分析了電流擴展，材料參數和工作條件對于溫度分佈的影響；其次，從電極電壓入手，計算出激光器中的等勢線分佈，並對不同深度處的電壓和電流分佈進行比較，研究了高阻區的不同位置和不同厚度、限制層和出射窗口半徑的大小對電流密度、載流子濃度和溫度分佈的影響；再次，實現了電、光、熱耦合，求出了閾值電壓，計算了不同偏置電壓下的電流密度分佈、載流子濃度分佈和熱場分佈，分析了溫度和載流子濃度變化對折射率、費米能級和光場的影響；最後，給出了考慮n - dbr和雙氧化限制層時激光器中的等勢線分佈，分析了n - dbr和雙氧化限制層對vcsel電流密度、載流子濃度、溫度和光場分佈的影響。The non - renewable resources is introduced into the production function, this paper formulated the optimum decision - making model of social planer, used the stochastic analysis method, analyzed optimum decision - making which the social planer about the expense and the non - renewable resources utilize under the indefinite condition, and obtained the optimum storage quantity of capital demonstration way and the density of stability distribution, and give the policy meaning of the model
摘要將不可再生資源引入生產函數構建了一個社會計劃者的最優決策模型，運用隨機分析方法，分析了不確定條件下社會計劃者關于消費和不可再生資源利用的最優決策，得到了最優資本存量的顯示路徑及穩態分佈密度，並給出了模型的政策含義。Secondly, the schedule and the cost have intimate inner connection, and the cost is not be carried out once and be scattered in the constructive period
但進度與費用之間存在著密切的內在聯系。費用不只是一筆總費用，還存在著時間上的分佈。分享友人