等周常數 的英文怎麼說
中文拼音 [děngzhōuchángshǔ]
等周常數
英文
isoperimetric constant-
Our results include almost all nonautonomous single - specie harvesting models with periodic coefficients ; for example : logistic model, gompertz model. gilpin model. aynala model
其所得結果包括了許多常見的具周期系數的非自治收獲模型，如： logistic型， gompertz型， gilpin型， aynala型等。Therefore, because the number of samples is less, but in order to successfully get orders, the printing surface treatment ( signs nameplate, etc. ) can not be lax, the usual choice of either silk screen, and pad printing or thermal transfer, but for a small number of sample products or the case is a long life cycle, cost, efficiency in my company ' s products, printing effects, the cost has obvious advantages
因為是樣品所以數量少，但為了順利拿到定單，表面的印刷處理（標志、銘牌等）又不能馬虎，通常的選擇不外乎絲印、移印或熱轉印，但針對樣品或少量產品而言則周期長、成本高，我公司產品在效率、印刷效果、成本方面具有明顯優勢。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。In the last chapter, by introducing the isochronous center of real systems into complex planar and defining complex center and complex isochronous center, a concise linear recursion formula for period constants is given, necessary and sufficient conditions of complex isochronous center ( the time - angle difference theorem ) proved, conditions of real systems with linearizable center and saddle treated unitedly and the isochronous center conditions discussed fully for a class of real planar cubic systems
在第七章，通過把實系統等時中心引入復平面研究，定義了復中心和復等時中心，給出了等時中心周期常數計算的簡明的線性遞推公式，證明了等時中心判定的充分必要條件（時角差定理人統一地處理了實系統具有可線性化的中心和鞍點條件，並對一類實平面三次系統的等時中心條件進行了完整研究This paper studies the spatial distrihution of water vapor press in the mountain areas of chongqing, with the month average data of water vapor press of climatic reorganized data including 34 meteorological observing stations in chongqing and 4 around it from 1971 to 2000 and 7 meteorological sentries in it from 1997 to 1999, and 100mx 100m dem of chongqing. according to the theory of mountain climate and basing on gis, it analysises the influencing factors to water vapor press decreasing coefficients in chongqing, and studies the relations among water vapor press longitude latitude and sea level elevation, and founds the water vapor press spatial distribution model in chongqing, and calculates the spatial distribution of the month average and the year average water vapor press in chongqing, and completes the cartographies of the water vapor press spatial distribution of chongqing
本文利用重慶地區34個及其周圍4個常規氣象觀測站1971 2000年30年和7個氣象哨1997 1999年3年氣候整編的月平均水汽壓資料，以及重慶地區100m 100mdem數據，對重慶地區山地水汽壓空間分佈進行研究根據山地氣候學原理，利用gis技術，分析重慶地區水汽壓遞減系數的影響因子，研究水汽壓與經度緯度和海拔高度等因子的關系，建立重慶地區水汽壓空間分佈模型，計算重慶市月平均和年平均水汽壓空間分佈，並完成重慶市水汽壓空間分佈的制圖。Based on the analysis of types and sources of risks that confront commercial banks, the paper first determines the methodology for its research, i. e. mathematical statistics for quantity factors and the fuzzy discriminating analysis for the quality factors. combining the evaluation approaches of the banks in germany and china, the paper gets 13 common indices, and with mathematical statistical method, chooses 4 factors that will influence customer credits : equity capital / total asset, velocity of stock in trade, velocity of total assets and payoff rate of total sale. the four factors with liquidity factor reflect the customer ' s financial characteristics, such as capital structure, operation, earnings and liquidity
在理論分析的基礎上，結合德國和中國有關銀行的客戶資信評價方法，在得到影響客戶信用13個常用指標的基礎上，利用數理統計分析方法（ t檢驗、多元判別分析和逐步判別分析等）得出影響客戶信用的四個因素：自有資本率、存貨周轉率、總資產周轉率和銷售盈利率，他們反映了企業資本結構、經營狀況和盈利水平，加入企業的流動性以後，它們決定了客戶的財務特徵。Aiming at the shortage of material information, tolerance information, technical information, and so on in the model, the author conducted a research on a step based and feature oriented method to integrate the information in the model. the models for several common features were created. they are hole feature, planar face feature, outer - round feature, planar pocket feature, revolved groove feature, circular pattern feature, and rectangular pattern feature
針對現有數據模型在材料、公差以及工藝信息等方面的缺失，研究了在基於step的面向特徵的產品數據模型中集成這些信息的方法，建立了一些常見特徵，如孔類、平面、外圓、平面槽及旋轉槽、圓周陣列、矩形陣列等特徵的信息模型，並用express語言來表達，該模型不僅包含幾何拓撲信息，而且增加了公差、工藝路線、裝夾定位、加工方法、及材料等信息。Chronic abuse produces psychosis similar to schizophrenia, causing picking at skin, self absorption, hallucinations and days or weeks without sleep. kidney and lung disorders can affect users
長期服食還會出現仿似精神分裂癥的精神病肌膚刺痛產生幻覺過分自我專注數日或數周不眠不休，以及腎肺功能失常等徵狀。Then, the auxiliary fields fdtd is used to the periodic structure made of dispersive material, such as the pyramid absorbers in anechoic chamber. the permittivity vs frequency property of the absorber is approached by some dispersive equation model, such as debye model and lorentz model, so the broadband response of the absorber can be gotten through one calculation
然後將輔助場fdtd應用到色散媒質周期結構中，導出了色散媒質中的迭代式，並以暗室吸波材料陣列為例進行計算，提出用某一類型的介電常數色散函數（如debye型、 lorentz型等）來逼近材料的介電常數頻率特性的方法，從而可以對吸波材料進行一次性寬頻計算。Because of hypofunction of blood, no enough blood can be transported to the brain. therefore oral ucler patients have a headache. canker sores can be healed through diagnosis and treatment on the basis of an overall analysis of the illness and the patient s condition
此病常好發生於口唇牙舌尖及兩頰部，潰瘍呈黃白色，周圍紅腫，數量多時甚至融合成片，疼痛劇烈，同時可出現頭頂部痛頭暈目眩易怒口苦等癥。Some other few patients may suffer from slight maladjustment of movement, local numbness or other neural disorders within a few of weeks or months after the treatment, but they can also be recuperated by themselves or under the help of medicines
還有少數病人在照射后幾周或數月，可能出現輕度運動失調局部麻木等神經系統體征，一般也可自行修復或經藥物治療恢復正常。In the third chapter, we will study the existence and uniqueness of the classical global solution and generalized global solution to the periodic boundary value problem and the cauchy problem for this kind of equation. in the second chapter, we study the following nonlinear wave equation of higher order : with the initial boundary value conditions or with where a1, a2, a3 > 0 are constants, ( s ), f ( s0, s1, s2 s3, s4 ) are given nonlin - ear functions, u0 ( x ) and, u1 ( x ) are given initial functions. for this purpose, by green ' s function of a boundary value problem for a fourth order ordinary differential equation we first reduce the problem ( 1 ) - ( 3 ) to an equivalent intergral equation, then making use of the contraction mapping principle we prove the existence and uniqueness of the local classical solution for the intergral equation
本文分三章，第一章為引言；第二章研究一類非線性高階波動方程的初邊值問題的整體古典解的存在性和唯一性，以及古典解的爆破；第三章研究此方程的周期邊界問題和cauchy問題的整體廣義解和整體古典解的存在性和唯一性，具體情況如下：在第二章中，我們研究一類非線性高階波動方程的如下初邊值問題：或或其中a _ 1 ， a _ 2 ， a _ 3 0為常數， （ s ） ， （ s _ 0 ， s _ 1 ， s _ 2 ， s _ 3 ， s _ 4 ， ）為已知的非線性函數， u _ 0 （ x ） ， u _ 1 ， （ x ）為已知的初始函數，為此，我們先用四階常微分方程邊值問題的green函數把上述問題轉化為等價的積分方程，然後利用壓縮映射原理證明此積分方程局部古典解的存在性和唯一性，又用解的延拓法證明上述問題整體古典解的存在性和唯一性，主要結果有：定理1設u _ 0 （ x ） ， u _ 1 （ x ） c ~ 4 [ 0 ， 1 ]且滿足邊界條件（ 2 ） ，若以下條件滿足：其中a ， b月0為常數， wThe condition of water pressure acting on the both sides of cement - soil retaining wall is researched by computing the seepage field around the wall. it is illustrated that the coefficient of water pressure, which isn ' t constant along the height, is affected seriously by some factors, e. g., the distribution and relative hydraulic permeability of the soil beside the wall, the hydraulic permeability of its foundation, and the buried depth of the impervious layer. as a whole, the lateral pressure acting on the wall based on seepage is always smaller than that without regard to seepage in the non - excavated zone. moreover, the pressure based on seepage is greater than that without regard to seepage in the excavated zone if the coefficient of passive pressure is smaller than 1. 176. this case is of great advantage to the stability of the wall
通過計算水泥土擋土墻周圍的滲流場，研究了墻側水壓力的變化規律.結果表明：水壓力系數沿高程並非常數，且受到墻側土層分佈及其相對透水性、墻基土的透水性和下臥不透水層埋深等因素的嚴重影響.總體來說，考慮滲流時墻后的側壓力總小於不考慮滲流時的相應值，且當墻前的被動土壓力系數較小時，考慮滲流時該側的側壓力則大於不考慮滲流時的相應值，因此，這種情況有利於擋土墻的穩定The whole paper consists of three parts : part is about general theory of the least positive period, which argues the necessary and sufficient condition for the existence of the least positive period for a periodic function, and concludes " the existence of the least positive period for that periodic function, which is continuous at least one point and not equal ever to a constant " ; part researches the least positive period for the sum of two periodic functions, followed its general expression ; part discusses non - periodicity for the compound function constructed by a periodic function and a non - periodic function, and the corresponding results
全文分為三部份：第一部份是關于最小正周期的一般理論，得到了周期函數有最小正周期的充分必要條件，也獲得了「至少在一個點連續且不恆等於常數的周期函數必有最小正周期」的結論；第二部份分析了兩個周期函數之和的最小正周期的問題，給出了其一般表達式；第三部份討論了周期函數與某些類型的非周期函數構成的復合函數的非周期性問題，並得出相應結論。The latest algorithm is used to derive the periodic constant when the infinity is used as a center, and the isochronous center conditions at infinity for the fifth system are demonstrated
利用最新演算法求出了無窮遠點作為中心時的周期常數，給出並證明了這類五次系統無窮遠點擬等時中心的條件。The first full week of the year this member is equivalent to the visual basic constant
一年中的第一個整周，該成員等效于visual basic常數The week in which january 1 occurs default this member is equivalent to the visual basic constant
1月1日所在的周（默認值） ，該成員等效于visual basic常數The first week that has at least four days in the new year this member is equivalent to the visual basic constant
包含新年中至少四天的第一周，該成員等效于visual basic常數The first day of the week as specified in your system settings this member is equivalent to the visual basic constant
系統設置中指定的一周的第一天，該成員等效于visual basic常數System the day of the week specified in your system settings as the first day of the week this member is equivalent to the visual basic constant
一周中的某一天，系統設置指定它作為一周中的第一天，該成員等效于visual basic常數分享友人