第二級發動機 的英文怎麼說
中文拼音 [dìèrjífādòngjī]
第二級發動機
英文
second-stage engine-
The content of this paper is arranged as foll owing : chapter 1 introduces the concept of credit, credit risk and credit assessment, as well as the history and development of credit assessment ; chapter 2 introduces the history of ai technology, and the background of expert system and neural network. characters and disadvantages of expert system and neural network are presented respectively and the necessity of combining expert system and neural network is lightened ; chapter 3 shows the process of dealing with sample data, including the treatment of exceptional data and factor analysis, and puts forward the concrete framework of the mixed - expert credit assessment system ; chapter 4 introduces concept of object - oriented technology, and constructs object model and functional model after analyzing the whole system. it also illustrates the implementation of concrete classes by an example of rule class and the inference algorithm in the form of pseudocode ; chapter 5 introduces the structure of the whole system, the major functional models and their interfaces, and the characteristic of the system is also generalized ; chapter 6 summarizes the whole work, and points out the remaining deficiencies as well as the prospective of this method
本文具體內容安排如下：第一章介紹了信用、信用風險、信用評價的概念，回顧了信用評價的歷史、發展和現狀，並綜合各種信用評價模型，指出這些模型各自的優缺點：第二章簡單描述了人工智慧技術，著重介紹有關專家系統與神經網路的基礎知識，通過總結它們的優缺點，指出結合專家系統與神經網路構造混合型專家系統的必要性；本章還介紹了神經網路子模塊的概念，提出了混合型專家系統的一般框架與設計步驟：第三章對樣本數據進行處理，包括異常數據的剔除、因子分析等，提出了信用評價混合型專家系統的具體框架結構，介紹了系統知識庫的主要部分、基於優先級的正向推理機制的流程、以及基於事實的自動解釋機制的具體實現方法；第四章介紹了面向對象技術，進而採用面向對象對信用評價系統進行分析，建立了對象模型和功能模型，並在此基礎上，採用c + +語言以規則類為例說明系統中具體類的實現，用偽代碼的形式描述了推理的演算法；第五章描述了整個系統的結構，對系統主要功能模塊和界面進行了介紹，並總結系統的特點；第六章總結了全文，指出本文所構造系統存在的不足以及對將來的展望。In section one, we analyze the mechanism of lwi gain, and study the effects of the rabi frequency q of the driving field, the injection rates ratio rb / r ~, the exit rate r0, the decay rates ~ and rab between atomic levels, as well as 3 incoherent pump rate r on the gain without inversion, dispersion and population difference of the system. in section two, we discuss the effects of the detuning of the driving field and the probe field on the gain
在第一節中分析了無粒子數反轉激光增益產生的機制、研究了驅動場的rabi頻率、粒子注入速率比值r _ b / r _ c 、粒子退出速率r _ o 、能級間的自發衰減速率r _ （ c - b ） 、 r _ （ a - b ）和非相干泵浦速率r對增益、色散和粒子數差的影響；第二節討論了驅動場和探測場的失諧對無粒子數反轉激光增益的影響。After the first stage burns out, it falls back to earth along a parabolic path, while the engines of the second stage fire to thrust the rocket into an earth orbit
當第一級燒毀后，沿拋物線的軌道落到地球，而第二級的發動機點火把火箭發射到地球軌道。Because river west area agriculture develop relatively outstanding among whole industrial structure, because two structure system that urban and rural areas cut apart make river west area represented by the tertiary industry quite backward urban economy again, have consumed a large amount of natural resources, manpower resources, but rely mainly on producing the primary product of the industry and agriculture, though river agriculture of the west offer a large amount of commodity grain while meeting one ' s own need, though jinchang, wine steel, yumen offer a large amount of basic industrial products for country for many years, but leading status and induced effect of urban economy still comparatively weak
如河西走廊在整個產業結構中農業發展地位過重，工農、城鄉分割的二元結構使河西走廊以第三產業為代表的城市經濟相當落後，耗費了大量自然資源、人力資源，卻以出產工農業的初級產品為主，盡管河西走廊的農業在滿足自身需要的同時還為其他地區提供了大量的商品糧，盡管金昌、酒鋼、玉門多年來為國家提供了大量的基礎工業產品，但產業結構失衡、城鎮體系結構不完善、城鎮經濟的帶動作用薄弱、生態環境面臨危機。Chapter 2 makes a positive analysis on the industry structure, kinds of tax formation and tax power division of the tertiary industry during 1994 - 2000. meanwhile, it studies the main factors of the growth of the tertiary industry in theoretical perspective. chapter 3 works in detail upon the relation and the interaction between tax and the tertiary industry growth
第一章簡介第三產業稅收制度的歷史沿革及現狀；第二章對1994 - 2000年問第三產業稅收的行業結構、稅種結構、稅級結構進行實證分析，並從定性的角度出發剖析第三產業稅收增長的主要動因；第三章通過構建第三產業稅收增長因素分解模型，從定量的角度出發，揭示第三產業稅收增長機制中的矛盾和問題及其對第三產業經濟增長產生的不利影響；第四章提出當前形勢下促進第三產業發展的稅收對策。分享友人