時間變化增益 的英文怎麼說

中文拼音 [shíjiānbiànhuàzēng]
時間變化增益 英文
time varied gain
  • : shí]Ⅰ名1 (比較長的一段時間)time; times; days:當時at that time; in those days; 古時 ancient tim...
  • : 間Ⅰ名詞1 (中間) between; among 2 (一定的空間或時間里) with a definite time or space 3 (一間...
  • : Ⅰ名詞1 (好處) benefit; profit; advantage 2 (姓氏) a surname Ⅱ形容詞(有益的) beneficialⅢ動詞...
  • 時間 : time; hour; 北京時間十九點整19 hours beijing time; 上課時間school hours; 時間與空間 time and spac...
  1. According the original thoughts, this paper circumstantiates how to carry this theory into chinese practice and how to eliminate the fundamental shortcomings if foreign standards applied mechanically. therefore, in a creative way, this paper establishes a feasible eva appraisal system according to chinese listed companies " character and demonstrates it on some listed companies, such as sichuan changhong co. ; tsingtao brewery company ; and harbor line companies. in one word, this paper wishes to provide a set of more practical and predictable standard in comparison with roe and eps

    本論文正是根據其理論,首先著重對目前如何將經濟加值實際運用於評估中國上市公司業績,進行針對性的分析和探討,從而逐步剔除機械套用國外指標體系的根本性缺陷,然後按照中國證券投資市場的特徵,創造性地建立一套符合中國實情地指標體系,同運用這一指標體系對四川長虹、青島啤酒以及整個港口行業的上市公司五年的業績情況做了仔細的運算和分析,並與現行的凈資產收率、每股收進行實證分析、比較,以期為上市公司業績評價提供一種更有預見性、更可行的指標體系。
  2. We study the time evolution law of the atomic response in an open - type inversionless lasing system when the probe or driving field is off - resonance, and compare the law with that obtained when the probe and driving fields are resonant. we find that the detuning has considerable effects on the time evolution law : when the probe or driving fields is off - resonance, the dispersive responses for the probe and driving fields are no longer 0 and the two - photon coherence is no longer a pure real ; the variation of the probe detuning can make the time evolution law of the population distributions and the gain ( absorbtion ) of the driving field changing obviously ; with detuning increasing, the time evolution behavior of the gain ( absorbtion ), dispersion of the probe field and the two - photon coherence will gradually diviate from the evolution law of the standard damped oscillator ; with the driving detuning increasing, the oscillating time of the dispersion of the driving field becomes longer, the amplitude and the stationary value increase

    研究了探測場或驅動場失諧情況下開放的型無粒子數反轉激光系統中原子響應的規律,並與探測場和驅動場都共振的演規律進行了比較.我們發現失諧對規律有顯著的影響;當驅動場或探測場失諧,原子對探測場和驅動場色散的響應不再為零,雙光子相干不再是純實量;探測場失諧的將使粒子布居和驅動場(吸收)的規律明顯改;隨著失諧的大,探測場(吸收) 、色散和雙光子相干隨的演行為逐漸偏離標準阻尼振子的演規律;驅動場色散驅動場失諧量的加而振蕩長,振幅和穩定值
  3. Abstract : biological invasions are a continuous feature of a non - equilibrium world, ever more so as a result of accidental and deliberate introductions by mankind. while many of these introductions are apparently harmless, others have significant consequences for organisms native to the invaded range, and entire communities may be affected. here we provide a survey of common models of range expansion, and outline the consequences these models have for patterns in genetic diversity and population structure. we describe how patterns of genetic diversity at a range of markers can be used to infer invasion routes, and to reveal the roles of selection and drift in shaping population genetic patterns that accompany range expansion. we summarise a growing range of population genetic techniques that allow large changes in population size ( bottlenecks and population expansions ) to be inferred over a range of timescales. finally, we illustrate some of the approaches described using data for a suite of invasions by oak gallwasps ( hymenoptera, cynipidae, cynipini ) in europe. we show that over timescales ranging from 500 10000 years, allele frequency data for polymorphic allozymes reveal ( a ) a consistent loss of genetic diversity along invasion routes, confirming the role of glacial refugia as centres of genetic diversity over these timescales, and ( b ) that populations in the invaded range are more subdivided genetically than those in the native range of each species. this spatial variation in population structure may be the result of variation in the patchiness of resources exploited by gallwasps, particularly host oak plants

    文摘:生物入侵是不均衡世界的一個永恆話題,尤其是當人類有意或無意地引入物種后.很多引入顯然是無害的,但另外一些則有著嚴重的後果,會給入侵地的生物以至於整個生物群落造成影響.本文總結了分佈區擴張的常見模式,概述了它們對遺傳多樣性和種群結構式樣所造成的影響.描述了如何根據以一批遺傳標記所得到的遺傳多樣性式樣來推斷入侵途徑,來揭示伴隨擴張選擇和漂在形成種群遺傳樣式中的作用.本文對日多的群體遺傳學方法進行了總結,這些技術可以用來在不同的尺度上推斷種群規模所發生的巨大(瓶頸效應及種群擴張) .最後,我們以歐洲櫟癭蜂(膜翅目,癭蜂科,癭蜂族)一系列入侵的數據為例對一些方法進行了說明.從500 10000年的尺度上,多態的等位酶位點上等位基因頻率的數據表明: 1 )遺傳多樣性沿入侵路線呈不斷下降的趨勢,支持了冰河期避難所作為遺傳多樣性中心的作用; 2 )入侵地區的種群與該物種原產地的種群相比,遺傳上的分更為強烈.這種種群結構在空上的異可能是被櫟癭蜂開發的資源尤其是櫟樹寄主在斑塊上出現異的反映
  4. Power supply system made up of some parallel operating inverters can meet the needs of different load magnitudes and achieve higher quality and reliability of power supply. it is propitious to the standardization and large scale manufacturing of the inverter modules. at the same time, with the growing usage of appliances powered by special suppliers, the market needs is developing enormously

    由多個模塊的逆電源並聯運行構建的電源系統,可以滿足不同的負載功率需求以及較高的供電質量和可靠性要求,並且有利於逆電源模塊生產的標準、規模;同,隨著使用特種電源供電的裝備日趨多,市場空不斷大,逆電源並聯控制技術的研究具有廣泛的經濟前景和社會效
  5. The innovative ideas in this paper is to replace the linear fixed - gain pid controller for a nonlinear pid controller. based on the step response curves of conventional control system, we analyze the ideal variety of three gains in different times and construct the simulated curves of proportional, intergral and derivative gain. the controllers has considered all sorts of imperceptible factors affecting the servo performances in a lpmsm servo system, which include the parametric uncertainties brought by the changes of the mobile mass, the dynamitic performance of the system and the size of input. to solve the problem of so many unknown parameters, we use transmit arithmetic to find the parameters which are fit for the system. to keep the robust and stable performance

    本文的創新之處在於,將傳統的固定的pid控制器用非線性pid控制器來代替,並在此基礎上,就一般控制系統的階躍響應曲線,分析了在不同響應階段pid的三個調節參數的理想情況,並根據這些理想,分別給出了比例、積分、微分參數的一種連續的非線性擬和函數。在分析雙位置環,仔細考慮了能使系統性能壞的各種因素,如系統的動態性能及控制出入能量的大小等等。
  6. This paper explains the basic knowledge and basic theories of national debt, gives the calculating formula of construe and stochastic construe separately. combing with the monadic regression model, the paper analyses the development of issuing scale of national debt of our government annually, studies the evolvement of scale of national debt and its relevant policies, and analysis the experience indexes measuring scale of national debt which is prevail in the world quantificationally. comparing with western developed countries further, based on that, there is a conclusion in this paper, the government issuing scales of national debt is appropriate at present, but it is impossible to increase the issuing scale

    本文闡述了國債的基本知識和基本理論,用數學分析和隨機分析的方法分別給出了債券的收率和債券定價的計算公式,結合國債規模的一元回歸模型,仔細分析了我國政府年度舉債規模的發展,研究我國國債規模及相關政策的演,並就國際流行的衡量國債規模的經驗指標進行了定量分析,由此進一步與西方發達國家進行比較,得出我國現階段國債的發行規模是適度的,但進一步大發行的空不大,為避免財政風險,發行規模應逐漸減小,積極的財政政策應在適當的機逐漸淡出。
  7. As the results, firstly, some steady parameters were determined, including the gain coefficient, diffraction efficiency of the volume grating and response time t1 of twm under different total incident intensity i0, ratio of two writing beams mo, angle between two writing beams 2 and polarization conditions

    論文給出了不同寫入光強比、寫入總光強、寫入光夾角及偏振光下ce : knsbn晶體的兩波耦合系數、衍射效率、響應規律。
  8. This paper takes the example for hulunbeier league, uses qualitative and quantitative methods, probes the following problems : estimation and disposal on investment cost and running expenses of grassland construction investment project estimation of project earnings principles of project borrowings and appliances of financial appraisal indexes and financial statements. based on the above research, conclusions are as following : if previous project period is longer than that of milti - year increment herbage, fixed investment must be considered which is resulted from renewed herbage when cost is estimated ; changes of period of operating cost resulted from renewed herbage and output changes must be considered when cost being estimated ; periodical output changes of herbage not only lead to cost changes, but also changes in project incremental income and relative cost indirectly ; devising suitable project borrowings is beneficial to favorable implementation on every project ; aiming for the characters of grassland construction investment project, selecting practicable financial appraisal statements and financial indexes can make calculating of financial beneficial of grassland construction project scientifically

    本文的研究主要以呼倫貝爾盟草地建設項目為例,基於案例進行定量和比較分析,探討草地建設項目在投資成本和營運成本的估價和處理、項目收的估價、項目籌資方案的確定原則和項目財務評價指標與評價報表應用方面的特殊問題,得出如下結論:必須在成本估價考慮牧草的更新所導致的固定投資;在進行成本估價必須考慮由於牧草的更新和產出所導致的經營成本周期性的不同;多年生牧草在產出上的周期性不僅會導致成本上發生,也會導致項目新收入的和與收入相關的成本接發生;設計合情合理的籌資方案,有利於保證項目中的每一個子項目順利執行;針對草地建設投資項目的特點,選擇適用的財務評價報表和財務評價指標才能更科學地測算草地建設項目的財務效
  9. ( 2 ) using the method of parameter identification in literature [ 117 - 118 ], selecting gain function : giving the initial value of the parameter observer from the time serial of output variables of the system, the numerical simulation result shows that the parameter observer proposed in this paper can identify the unknown parameters of the system quickly and exactly no matter if the parameters keep invariable or change in some rule, and the identifying speed is faster than the method in [ 117 - 118 ], when the unknown parameters are being identified, vith parameter compensator, it can synchronizes two hyperchaotic systems completely even if some parameters mismatch

    ( 2 )採用文獻[ 117 - 118 ]提出的參數辨識方法,通過選取更一般的函數: l _ i ( x _ i ) = kx _ ii = 1 , 2 , 3並根據系統輸出量的序列給出參數觀測器的初始值來進行參數辨識,數值模擬結果表明:採用本文的參數觀測器,在系統參數固定或的情況下,都可對系統未知參數實現快速高精度辨識,辨識的速度快于文獻[ 117 - 118 ]提出的方法;在辨識參數的同,結合參數補償器,使兩個參數不匹配的超混沌系統同步。
  10. Nowadays china is stepping into a new era which is full of opportunities and challenges : the entry to wto is bringing china into a global market, globalization and marketization make productivity factors flow more faster than before and the industrial value - chain has been redistributed ; knowledge renewal and technology reform are growing beyond human ’ s belief ; consumer demand is increasing and changing rapidly … … all these make chinese corporations face the tremendous challenges after had experienced severe pain from social and economical transformation

    當前,中國的經濟發展正步入了一個充滿機遇與挑戰的歷史期:加入wto ,融入全球的市場環境,經濟的全球和市場帶來生產力要素的快速流動和產業價值鏈的重新布局;知識更新、技術革正以令人難以置信的速度發展;消費者需求日長和豐富,市場空及發展潛力巨大… …經濟環境快速而巨大的帶給中國企業繼經濟轉型陣痛之後又一次嚴峻的考驗。
  11. After january, 2003, “ the law of government procurement ” came into force, both concentrative purchase and dispersive purchase are use by government, which starts an new trend of government purchase progress, using concentrative purchase to do more large quantity purchase, dispersive purchase is used less and less, it only used to do little quantity purchase. the list of government purchase has become longer and longer, the variety of materials and the quantity of materials has increased so sharply. our country ’ s government purchase has made a great progress, but but we still need to take notice of the other side of the fact, there are two important issues, the first is the obstacle of the reforming process in the field of public finance system ; and the second is the kinds of problems occurred in the process of government procurement

    政府采購制度改革是我國公共財政改革的重要組成部分,引入我國從試點到推廣實施僅有十年的,卻取得了巨大的進展, 《政府采購法》在2003年1月開始實施后,我國採用集中采購與分散采購相結合的政府采購方式,開始了我國政府采購的集中趨勢進程,從早期分散采購演為大批量的集中的采購方式,當然,小批量分散采購也結合其中,列入政府集中采購目錄的物資種類與采購數量大大加,取得了巨大的進展,卻也存在著不少的問題,具體表現為政府采購過程中出現的各種操作性問題和政府采購制度推進的障礙,以及政府采購的環境效問題,操作性問題和政府采購制度推進的障礙問題本質上可歸納為兩方面,即內在因素,這是事前性的,偏重於制度性、體制性等根本問題;外在因素,這是管理操作層面的因素,政府采購的環境效問題是由政府是否采購綠色產品,推動綠色產品在社會的使用而引出的,於是,對政府采購集中趨勢中所暴露出的問題進行分析,找出問題的根源以探尋解決的思路及對策就顯得尤為急迫。
  12. Abstract : according to time - sharing price counting policy of electricpower, the relationships of current density and current efficiency at different ratios of sulfuric acid and zinc are obtained through analyzing process data of electrolytic zinc process ( ezp ), and an optimization model of time - sharing power supply dispatching system ( tpsds ) of ezp is established. an single - loop simulated anneling algorithm with mutation and variable searching spaces is proposed and applied to the tpsds to obtain optimal time - sharing power supply scheme. industrial practical results show that the optimal dispatching system can greatly decrease the power consumption of ezp and increase the time - sharing profits

    文摘:依據電力部門的分計價政策,根據由生產過程數據所建立的不同酸鋅比下電流密度與電流效率關系,建立鋅電解過程分供電優模型.同,提出一種帶異操作和搜索空的單循環模擬退火演算法,並將該演算法應用於分供電優調度,獲得最優的分供電方案.工廠運行結果表明:整個優調度系統能顯著降低鋅電解過程的電耗並加分
  13. Agrawal ' s theory model of soa ca n ' t simulate accurately the amplified signal pulse shape in soa when the pulse width is as short as several picosecond. so we simulate accurately the peak power, full width half maximum, rising time and falling time of amplified pulse after considering the gain compression, gain asymmetry, gain shift, gain variable with situation and time. with ultrahigh velocity dense wavelength division multiplexing ( dwdm ) and optical time division multiplexing ( otdm ) developing, we demand more and more short signal pulse and more signal channels

    但當信號脈沖的寬度只有幾個皮秒, soa傳統的agrawal理論模型已經不能完全準確地模擬soa對信號脈沖的放大情況,在此基礎上,我們在全面考慮soa的壓縮、非對稱和漂移、隨位置和的載流子壽命等物理機制的情況下,對皮秒超短高斯信號光脈沖經soa放大后的脈沖的峰值功率、脈沖半值全寬度、脈沖的上升和下降等重要物理參量進行了準確模擬和詳細研究。
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