time diffusion 中文意思是什麼
time diffusion
解釋
時間微分-
When diffusion controls, the moisture fraction decreases in a complex but close to exponential manner with time.
當擴散控制時，濕含量遵循著復雜的但接近於指數關系的形式而隨時間降低。 -
For a soil or rock of water - lacked, a heat transfer theoretical model is developed, which is a steady or unsteady, the results show that reservoir temperature, thermal diffusion coefficient, inlet temperature, flow rate of and run time of ground source heat pumps have an effect directly on heat transfer process of dhe. it can deduce that intermit running is favorable for this type of soils and rocks
對于貧含水地下巖土層建立了穩態與非穩態傳熱的理論模型，分析結果表明，巖土層的熱儲溫度、導溫系數、埋地換熱器進水溫度、流量以及地源熱泵系統的運行時間或開停機比，都對埋地換熱器的傳熱過程產生直接影響，可以推斷，對于該類型巖土層的地源熱泵系統，採用間歇運行將是有利的。 -
Meso - scale atmospheric diffusion patterns and time scales over beijing area
北京地區大氣中尺度擴散模態和時間特徵分析 -
Spatial distribution and time scales of atmospheric diffusion over beijing area are revealed by means of a random walk simulation model and practical meteorological data with a specified emission source from the city. results show a southward transport pattern for wintertime while a northwest transport of pollutants in summer. the area is the least evidently influenced by the emission source in spring, while the largest in autumn. the time spent for instantly emitted material removing from the model domain varies from winter - spring to summer - autumn. the former was shorter one of less than 20 hours ; the latter was longer one of approximately 30 hours. distribution of occurrence probability for different removal times was not symmetry. reducing slowly at the end of longer removal time, probability exists for pollutants remaining in this area a long time
結果表明，冬季示蹤物偏南夏季偏西北的輸送明顯春季擴散影響范圍最小秋季最大。示蹤物從200km200km模式區域輸出的平均時間去除時間明顯分為冬春季和夏秋季兩組，前者較小，平均在20h以下，後者較大，平均約30h 。不同去除時間出現的頻率分佈是非對稱的，在長去除時間一側，出現頻率下降緩慢，顯示污染物有在該區域內長時間滯留的可能。 -
A common problem in theoretical chemistry, condensed matter physics and materials science is the calculation of the time evolution of an atomic scale system where, for example, chemical reactions and / or diffusion occur
一個在理論化學方面的很普通的問題，涉及到凝聚體物理學、材料科學，例如：化學反應和擴散發生的時間。 -
In the light of the recent work in biological models, especially in the chemostat models, the dissertation provides a systematic study on the asymptotical behaviour of some chemostat models built by delay or diffusion differential equations. the main contents and results in this dissertation are as follows : i ) the global asymptotic behavior of the chemostat model with the beddington - deangelies functional responses and time delays is studied. the conditions for the uniform persistence of the competing populations are obtained via uniform persistence of infinite dimensional systems
本論文基於當前生物學模型，特別是恆化器模型的研究現狀，深入系統的研究了時滯和擴散方程描述的幾類恆化器系統的漸近性態，本文的主要內容包括以下幾個方面：一、研究了具有beddington - deangelies功能性反應函數的時滯恆化器模型，利用無窮維連續動力系統的一致持續生存的理論給出了兩競爭種群一致持續生存的充分條件，利用單調動力學系統得到了系統的全局漸近穩定性。 -
Pulse electric current heat treatment ( pecht ) developed by sodick, ltd., of japan, is a recently developed material processing method which consists of spark plasma sintering and welding, plasma activated sintering and welding, big pulse electric current ( bpec ) diffusion welding etc. the following are basic merits of pecht : rapid heating and cooling ; short sintering or welding time ; lowering sintering or welding temperature
脈沖電流熱加工（ pulseelectriccurrentheattreatment ，比如燒結，焊接等）是九十年代發展起來的一種材料快速制備新技術，它包括放電等離子燒結與焊接、等離子活化燒結與焊接、脈沖大電流擴散焊接等。它具有升溫、降溫速度快、能在較低的溫度下燒結或焊接以及時間短的特點。 -
A transfer model is established, which can be used to study the interaction between the land surface physical processes of inhomogeneous region and the structure of atmosphere boundary - layer over urban and rural terrains. the model has simulated surface heat flux, surface temperature, temperature profiles, height of mixture layer and so on. and the differences between urban area, suburban area and rural area have been compared. this model mainly depends on the parameters below : surface albedo, surface roughness coefficient, moisture available coefficient of soil, thermal capacity and thermal diffusion coefficient of errain, cloudage. the result shows that this model can simulate the structure and eigenvalues of atmosphere boundary layer and their changes in a day. parameters used in this model aim at beijing city, and the time is at the beginning of september. to other cities, or other time, the parameters should be adjusted accordingly. in addition, being adjusted, the model can also be used for other homogeneous and inhomogeneous terrains
模式主要依賴于以下參數和物理量：地面反照率下墊面粗糙度土壤的可含水量下墊面的熱容量和熱擴散系數雲量等參數。結果表明，本模式能合理地模擬不同地表熱量平衡地表氣溫混合層高度湍流交換系數湍流動能位溫廓線等，以及它們的日變化。該模式所取參數主要針對北京市，時間為九月初，對于其他城市，參數應作相應的調整。 -
At the some time, the reaction between ti and al also is an exothermal reaction, so the inner energy is increased sharply which prompt al3ti to decompose and the diffusion rate of ti toward graphite particles and the decrease the inoculation tune
同時加鎂後生成的tic顆粒的擴散速率增大，因而增大了tic顆粒的形核數，使生成的tic顆粒更加細小彌散，在復合材料中的所佔體積分數增大。 -
At the same time, the intrapartical diffusion and liquid internal mass transfer can been enhanced by ultrasound field, owing to additional stirring, the increasing rate of intraparticle diffusion coefficient is enhanced, while that of the liquid film mass transfer coefficient is reduced under ultrasound field
模型研究表明： freundlich ?兩相阻力模型計算得到濃度與實驗測定值非常吻合，超聲場能有效地強化浸取粒內擴散與液膜傳質，攪拌作用下超聲強化液膜擴散的的能力降低，強化粒內擴散的能力增強。 -
According to gaseous " molecular kinetic, the mass diffusion rate is within finite value. so theoretical conclusion of mass flux ' s producing and the essential relation of flux vs. force could be drawn. with the assumption that local density states in near equilibrium and the distribution is gradual changed, the classical first pick ' s law was modified considering mass relaxation time
根據氣體分子運動論對質量傳播速度為有限值情況下的質量流的產生及流與力之間的本構關系作了理論推導，在假定局域濃度處于近平衡態，其分佈為漸進的情況下得到了考慮質量鬆弛作用的經典fick第一定律的修正式。 -
This dissertation investigates both existence of traveling wave solutions for delayed reaction diffusion systems and lattice differential equations, and global attractor of spatially discretized fitzhugh - nagumo equations with dirichlet or neumann boundary conditions. for delayed reaction diffusion systems, the existence of traveling wavefronts in diffusive and coorperative system with time delays is provided, firstly ; the monotone iteration scheme, together with upper - lower solution technique, is applied to establish the existence of traveling wavefronts of delayed reaction diffusion systems with some zero diffusive coefficients. secondly, schauder fixed point theorem is applied to some operators to prove the existence of traveling wave solutions in a properly subset equipped with exponential decay norm, which is obtained from a pair of upper and lower solutions for delayed reaction diffusion systems with non - quasimonotoiiicity
對于時滯反應擴散方程，我們先利用吳建宏和鄒幸福[ j . dynam . diff . eqns2001 （ 3 ） ]中的主要定理來研究時滯競爭擴散lotka - volterra系統波前解的存在性，給出了這個定理在非線性項滿足弱擬單調條件（ qm * ）時在系統情況中的應用；並利用單調迭代方法和上、下解技術，對于具有部分零擴散系數的時滯反應擴散方程建立波前解的存在性定理，對于具有部分零擴散系數的時滯反應擴散方程建立波前解的存在性定理。 -
Using a dissolved conservative material as a tracer in the water, a three - dimension advection - diffusion water exchange numerical model was used to study the flushing time by discharge and the discharge dominated region of the yangtze estuary. the flushing time of the yangtze estuary is an important eigenvalue, which denotes the water environmental capability of estuary
然後應用以溶解態的保守性物質做為研究長江口水體交換的載體，建立了完全三維對流擴散型的長江口水體交換的數值模型，對長江口的水體交換時間做了一個整體的計算。 -
Using a dissolved conservative material as a tracer in the water, a three - dimension advection - diffusion water exchange numerical model was used to study the flushing time by discharge and the discharge dominated region of the yangtze estuary based on the successful simulation of flow field
在成功模擬長江口流場的基礎上，同時應用以溶解態的保守性物質做為長江口水體交換的載體，建立了三維對流擴散型的長江口水體交換的數值模型，對整個長江口的水體交換規律進行了研究。 -
Based on the theory of technical innovation and technical innovation diffusion elaborated, as well as fluxionary calculus and game theory, the thesis analyses corporation adoption with game theory in the process of technical innovation diffusion : analyzes in the situation of information symmetry and information asymmetry the gambling between the supplies and the latent users of innovation, discusses the mechanism of the phenomenon " reversion choice " with emphasis in the situation of information asymmetry, and also introduces signal transmission model and information screen model to realize pareto improvement ; at the same time it analyzes in the situation of complete rationality and limited rationality the gambling between the latent users of innovation
依據已闡述的技術創新和技術創新擴散理論，以及微積分、博弈論等相關理論，對技術創新擴散中企業採用行為進行了博弈分析:分析了信息對稱和信息不對稱情況下創新供給者與創新潛在採用企業之間的博弈，重點討論了信息不對稱時「逆向選擇」現象發生的機理，並引入信號傳遞模型和信息甄別模型以實現帕累托改進;同時分析了完全理性和有限理性情況下創新潛在採用企業間的博弈。 -
The effects of the fabrication conditions on the crystal structure, grain size, micromorphology and electrochemical performance of these materials have been studied in depth. the reaction mechanism of the low - heating solid - state reaction method has also been investigated. in addition, a novel electrochemical method ( rpg method ) based on the concept of " ratio of potentio - galvano - charge capacity " has been for the first time developed to determine the diffusion coefficient of lithium - ion within insertion - host materials on the basis of the spherical diffusion model
本論文較系統地考察了低熱固相反應法合成鋰離子電池正極材料的可行性問題，研究了工藝條件對材料的晶體結構、晶粒尺寸、微觀形貌及電化學性能等的影響，探討了低熱固相反應的機理，並通過引進「恆壓-恆流充電容量比」的概念，給出了一種測定鋰離子嵌入脫出固相擴散系數的新方法。 -
Firstly, it studied the incubation time in new technology diffusion applied mass model, interpreted the influence factors to incubation time
首先運用bass模型對創新產品的市場醞釀期進行了研究，解釋了影響市場醞釀期的諸多影響因素。 -
How did bloom prepare a collation for a gentile ? he poured into two teacups two level spoonfuls, four in all, of epps s soluble cocoa and proceeded according to the directions for use printed on the label, to each adding after sufficient time for infusion the prescribed ingredients for diffusion in the manner and in the quantity prescribed
他往兩個茶杯里各舀了滿滿二平調羹-統共四調羹埃普斯牌速溶可可，根據商標上所印用法說明，給它充分的時間去溶化，再把指定的添味料按照規定的分量和方法兌進去，讓它散開來。 -
Aimed at the helium damages in plutonium caused by a decay, he + ions were implanted in aluminum and the behaviors of helium in aluminum were investigated both theoretically and experimentally to simulate those effects in plutonium. at the same time, the diffusion of helium - 3 produced by tritium decay in stainless steels, which were served as the structural materials in tritium and fusion technologies, was also investigated in this thesis
針對放射性元素鈈的衰變引起的氦損傷問題，選擇模擬材料鋁進行了he的離子注入和其中氦行為的理論和實驗研究，同時，也研究了氚工藝及聚變堆技術結構材料不銹鋼中氚衰變~ 3he的擴散行為，從而對兩種金屬中he的行為有了較深入的認識。 -
The theory and experiment of measuring diffusion coefficients in terms of mr signal attenuation has been established for decades, but recent advance of diffusion tractography has enabled us, for the first time, to visualize and analyze the axonal fiber tracts in the living brain non - invasively
其實，利用磁振訊號衰減量測到擴散系數之理論與實驗已確立了幾十年，但近年來擴散神經纖維束造影的發展，第一次使我們能夠在活體非侵襲性的觀察和分析神經軸突纖維束。
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