恆元 的英文怎麼說

Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet - parameter on evaporator. fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio - parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping

本文的主要內容如下： 1 ）對翅片管蒸發器結構特點進行分析，選取適當的微元控制體，就干、濕和霜工況下對每個微元分別進行傳熱傳質分析，基於經驗關系式確定霜的有關參數，對于霜工況下的霜生長建立模型，經適當假設，運用質量守恆、能量守恆和動量守恆方程建立適合動態模擬的蒸發器數學模型，為系統模擬奠定基礎； 2 ）對蒸發在大擾動下的開、停機過程，運用動態集中參數模型進行分析和計算，為更好地描述製冷系統運行的全過程奠定基礎，同時也為製冷系統實現自動控制提供一定的理論基礎； 3 ）對蒸發器正常運行過程，運用動態分佈參數和參數間定量耦合的觀點來分析和計算，為更好地了解穩態工況下各點參數的變化情況及各入口參數對蒸發器動態特性的影響即蒸發器性能對各參數變化的敏感性； 4 ）編寫翅片管蒸發器動態特性模擬計算程序，可以計算不同邊界條件和初始條件下的製冷劑熱力參數、空氣溫濕度和霜厚度分佈場，實現對翅片管蒸發器在干、濕和霜工況下的動態模擬。

In this paper, the folio wings are introduced briefly : holonomic theory ; the basic idea that d. zeilberger used to prove identities using holonomic theory. and wu method is generalized to the non - commutative weyl algebra. furthermore, dialytic method of elimination is replaced by wu method, so the prove can be extended from the single - variable hypergeometric identities to multi - variable ones

本文簡要介紹了完整性理論， d . zeilberger利用完整性理論證明恆等式的基本思想，將吳方法推廣到不可交換的weyl代數上，用吳方法取代了d . zeilberg在證明完整性函數恆等式的理論框架中的析配消元法，從而將這種證明理論由單變量超幾何恆等式的證明擴展到多變量超幾何恆等式的證明。

Being less than a month to the lunar new year feb. 1st, the new hk 10 banknotes issued last year by hong kong monetary agency hkma for the citizen s convenience are " out of stock " in recent days. both hang seng bank and hsbc stated that they could not supply large quantity of the new " flower crab " to citizens until the 20th. representative from hsbc also said the exchange quantity will be restricted. .

距離農歷新年2月1日不足一個月，金融管理局為方便市民封利市于去年發行的花蟹十元新鈔，近日在部分主要銀行分行出現缺貨，恆生匯豐均稱，要到本月20日才可大量供應花蟹予市民兌換，其中代理十元新鈔的匯豐清晰表示，屆時會限額兌換。

For decades, scientists have known that supernovae, the explosive deaths of giant stars, trigger reactions to forge most of the heavy elements in the universe

巨大的恆星在死亡時會產生超新星爆炸，所引發的反應，製造了宇宙中大多數的重元素，這是科學家幾十年前就已經知道的。

On the bases of the galaxy evolution theory, we use the therotical chemical evolution model of three zone ( such as halo, thick disk and thin isk ) and multi - phase ( diffuse gas, molecular clouds, stars of both low and high mass, the remnants ). by comparing with the observational constraints, such assurface densities, age - metallicity relation, g - dwarf metallicity distribution in the solar neighbourhood and the correlation between [ a / fe ] and [ fe / h ], supernovae rates, infall rates. the rationality of the model is verified. based on the theory model, we calculate the abundance of neutron capture element

本文正是在銀河系化學演化的基礎上，利用銀河系的三成分（ threezone ） （即暈、厚盤和薄盤）多相（ multi - phase ） （氣體，分子云，大、小質量恆星以及剩餘物質）的化學演化的理論模型，通過與觀測約束（質量面密度、場星的年齡-金屬豐度關系、太陽附近g矮星金屬含量分佈函數、三成份的特徵量、元素的星系化學演化、超新星的爆炸率、內落速率等）的比較，來檢驗模型的合理性。

We offer instalment payment plan to make lasik more available to everyone. credit cards issued by : hsbc - 6, 12, 18 or 24 months interest free instalment

只適用於持有匯豐恆生星展花旗大來信用證東亞或荷蘭銀行及其聯營之visa或mastercard港元信用咭

An invariable current single power supply administering chip

一種恆流單級電源管理晶元

The cheapest way to get one is to invoke the spectral theorem and to conclude that normal operators always have non-trivial invariant subspaces.

取得這樣結果的最省力的嘗試是引用光譜定理而得到正規運算元恆有非平凡不變子空間的結論。

Their shells, which apart from hydrogen, helium, and carbon also contain portions of the heavy elements formed in the stellar core, are inherently unstable, and their pulsing creates a withering stellar wind a billion times stronger than the solar wind we know today

它的殼層除了氫層、氦曾和碳層外還有包含一部分產生自恆星核心的重元素，天生的不穩定，它們的脈動產生了一種毀滅性的星風，比我們現在知道的太陽風要強數百萬倍。

4supplied with strong support clips and suction cups, designed for extended use and completely safe

4自動恆溫控制及高質量的發熱元件，高效節能經久耐用。

The temperature distribution on the high temperature side of an electric tunnel furnace is analysed and simulated on the basis of the principle of thermal radiation by the way of thb ( thermal heat balance ). the heated silicon carbon sticks are decomposed into innumerable tiny heating faces, which exchange the heat with the heated materials. a numerical model based on the radiation intensity law is constructed to calculate the energy absorbed by the heated materials and simulated by a computer. the results showed that the even distribution of temperature can be obtained by optimizing the arrangement of the silicon carbon sticks according to the calculation results to make the structure design more reasonable. these calculation results have been used in the practical designs and the expected objectives achieved

利用熱輻射原理，採用熱平衡法對電熱隧道窯的高溫恆溫區溫場進行了分析和模擬.計算中將發熱棒分解為無數微元發熱面與燒結體進行熱交換，依據輻射強度定律，建立了燒結體接收能量的數學模型，並用計算機進行了模擬計算.結果表明，依據模擬結果來優化硅碳棒的排布，可使結構設計更加合理，進而可以獲得分佈均勻的恆溫區溫場.計算結果已在窯爐設計中應用，實踐效果良好

Their discovery marks the first abundance determination of the actinides element thorium in a star beyond the milky way, and follows the detection of thorium in more than ten stars within the milky way

他們發現，標志著首豐測定的錒系元素釷星以外的銀河系，跟檢測釷十余恆星的銀河系

This thesis has studied the dynamic features of a class of the discrete - time neural network model of two neurons, such as the convergence and periodicity and etc. the function of the neuron signal transmission in this model, which belongs to three piecewise constant argument, indicates the following charactersif the signal of one neuron on the network is active between a and b, it will produce invariable encouragement effect on another neuron ; if the signal of one neuron is lower than a, it will produce invariable restrain effect on another one, if the signal of one neuron is higher than b, it will produce no effect on another one

本文研究了一類二元離散人工神經網路模型的解的收斂性及周期解的存在性等動力學特徵。該模型的神經元信號傳遞函數是三段常數不連續函數。這種信號傳遞函數表明如果某神經元的信號在a與b之間活躍，則它對另一個神經元產生恆定的激勵效果，如果某神經元的信號低於a ，則它對另一個神經元產生恆定的抑制效果，如果某神經元的信號高於b ，則它對另一個神經元不產生作用。

Texas instruments incorporated, “ understanding buck - boost power stages in switchmode power supplies ”, march 1999

宋自恆、林慶仁」功率因數修正電路之原理與常用元件規格」 ，新電子科技雜志第217期， 2004年4月號。

Also, the thesis calculate and analysis the transverse deflection of steel box girder deeply in multiple factors. firstly, the article introduced the calculative methods and theory of local stress and strain of bridge structure. then program software system of finite element method was introduced. after that, the influential factors to the calculatial result and their values were analysed and suggested

本文首先介紹了橋梁結構局部應力應變計算理論和方法，對有限元計算程序進行了介紹，然後分析了縱橫隔板設置、梁高及梁寬變化等因素對鋼箱梁橋面板在恆載作用下的橫向撓度的影響，並將這些計算結果進行對照分析，從而找出了影響橋面板橫向撓度的主要影響因素，並得出了相應的數值可供工程實踐參考。

As an example, the space analysis model about the wuhu changjiang river bridge is done and the internal forces about the wuhu changjiang river bridge due to dead load and lived load are analyzed. 2. the vibration analysis of the long span plate - truss composite cable - stayed bridges

文中以蕪湖長江大橋為例，建立了該橋的空間有限元分析模型，並重點分析了該橋在自重恆載作用下的結構內力及車輛荷載對橋梁結構內力的影響。

Some key issues in the modeling of a long span composite cable - stayed bridge are discussed such as cable tension, dead load, large deflection, concrete deck stiffness, concrete deck - steel girder connection, and boundary condition. some conclusion can drawn from the thesis : 1. the initial equilibrium configuration of the bridge is clarified in the thesis

本文深入討論大跨度結合梁斜拉橋"基準"有限元模型建立過程中的幾個關鍵問題並得到一些有意義的結論： 1 .明確斜拉橋在索初應力和恆載作用下的初始平衡構型? ?處于初始平衡狀態時的幾何位置，給出了其計算方法。

The li - ion or li - polymer battery ic use cc / cv charging mode which includes the 3 charging stages : the trickle charging, large constant current charging and constant voltage charging

本文設計的鋰電池充電器晶元採用了恆流恆壓的充電方法，並在此基礎上將充電過程分為三個階段:預充電、恆流充電和恆壓充電。

The effects of various additives elements and doping methods on foam nickel electrode ' s performance were studied using constant current charge - discharge test. we compared two doping methods : mechanical mixing doping and chemical co - precipitation doping

利用恆流充放電實驗等電化學測試方法研究了不同摻雜元素及摻雜方式對泡沫鎳電極的影響作用，對機械混合摻雜和化學共沉積摻雜進行了比較。

After which, the battery will be charged by large constant current to allow the fast charging. finally, the constant voltage charging is adopted to guarantee the battery was charged to its full capacity. under the condition that the temperature has raised to a certain threshold at the constant current charging stage, the over temperature circuit is performing and it provides a compensation current which switches the system to constant temperature charging mode with the intention of protecting the ic

即在充電初期採用較小的電流對電池進行預處理，對出現過放電的電池進行修復和保護;然後採用較大的恆定電流對電池充電，實現快速充電的目的;最後採用恆定壓充電，確保電池充滿;在恆流充電階段，當晶元溫度上升到一定程度時，晶元過熱保護電路開始工作，該電路以提供充電補償電流的形式使充電進入恆溫充電模式，對晶元進行保護。