gravity model theory 中文意思是什麼
gravity model theory
解釋
重力模型理論-
Metropolitan circle is the result of industrialization and urbanization, which is the embodiment of centralization and radialization when the metropolis is developing to a certainty, in order to advance the space and economy to conform, to form a corporate area, fabricating the new type of metropolitan circle in which the metropolis is the core is new topic for discussion of innovative space structure of the big ciry this paper combine the theory expatiation and demonstration analysis with comprehensive and new statistics data, and theory model, and discusses the all - around regional development in chengdu area from a new angle, ie : using space structure model of metropolitan circle to develop the overall enhancement of strength in chengdu first, the thesis defmitudes the concept, connotation, and character of metropolitan circle, after that, it discusses the formative mechanism of metropolitan circle from the factors such as market, institution and ect moreover, from the practice of metropolitan circle ' s development in ho me and abroad, it summarizes the significance of the metropolitan circle form for the economic and social development, as well as the experience for reference and the problems we should pay attention to = based on these theories and practice, it brings forward the necessity and strategic significance of building metropolitan circle in chengdu, and analysis its possibilities, it also makes a research on the model of this circle, it innovatively brings forth that the double - polar circle structure of central city - sub central city - satellite town should be builded, through the establishment of index system, the sphere of metropolis circle in chengdu can be set which means the central city, sub center city and satellite town are sett it also analysis how to determine the gravity between center city and circumjacent area, and discusses the function orientation of center city and satellite town at last, it briefly analyses the transportation designing of suburb and city which are imperative for constructing the metropolitan circle in chengdu
本文將理論闡述和經驗實證分析與較全面的最新統計資料，以及理論分析模型分析結合起來，從新的角度深入探討成都的區域整體發展，即以都市圈的空間結構模式促進成都整體實力的全面提高。本論文首先明確了都市圈的概念、內涵及特徵，從市場、等因素探討了都市圈的形成機理，並從國內外都市圈的發展實踐中，總結出都市圈這種空間形式所引起的經濟和社會發展的意義所在，以及我們值得借鑒的經驗和需要注意的問題。在此理論和實踐基礎上，提出構建成都都市圈的必要性及戰略意義，分析其可能性；並且對如何構建成都都市圈模式進行了探討，主要是創新性提出構建中心城市-副中心城市-衛星城鎮的雙極圈域結構，並通過指標體系的建立以確定成都都市圈的范圍，即中心城市、副中心城市和衛星城鎮的確定，以及測定中心城市與周邊地區的引力大小，以及對中心城市和衛星城鎮的功能定位進行了探討。 -
Modern logistics system simulate optimization this thesis in theory aspect, establish the mathematics model and bring up the calculate way using heuristics method to optimize the right conveyance problem in the simulative logistics system ; solution logistics the center choose problem, make use of the number analysis the method ( center of gravity method ) to proceed the optimization design solution to calculate ; the thesis furthest extrude put great emphasis on the logistics system production total cost had bigness affect and difficult to control over the problem of the manufacture and stock quantity make use of the matlab to bring up the simulative optimization design project separately with simple optimization algorithm and simplex method algorithm
現代物流系統模擬優化論文在理論方面，用物流系統模擬對運輸優化問題運用啟發式方法建立數學模型、提出演算法；在解決物流中心選址問題時，利用數值分析法（重心法）進行優化設計解算。本文最為突出的是運用簡單尋優技術的單純形法利用matlab就物流系統中對總成本有巨大影響並難以控制的生產和庫存數量問題提出可行的模擬優化設計方案。 -
By using the improved gravity model and gray theory model, the essay makes forecast analysis on future passenger traffic volume of shjiazhuang - taiyuan passenger - dedicated line from three aspects, including passenger flow of local line, passenger flow originating from other railways and induced passenger flow, and using gdp and population density of surround cities along the passenger corridor, the passenger traffic volume on existing line of shijiazhuang - taiyuan passenger corridor and the weighted operation time between cities as impact factors respectively
摘要利用改進的重力模型和灰色理論模型，從石太客運專線的本線客流、跨線客流和誘增客流3個方面，分別以客運通道周邊城市的gdp和人口分布密度、石太客運通道既有線的旅客運輸量、城市間的加權運行時間為影響因子，對石太客運專線的旅客運輸量進行預測分析。 -
This paper presents a review of the moisture transfer theories in porous media during drying processes in the last century. then an innovative pore network model in drying based invasion percolation theory and pore network theory essentially different from the classical continuum model is developed. moisture transfer characteristics in porous media during drying process are studied under isothermal and absence of gravity
本論文首先回顧了近一個世紀以來多孔介質在乾燥過程中內部濕分遷移理論，指出孔道網路理論在多孔介質乾燥研究中所具有的獨到優勢，繼而藉助侵入滲流理論所取得的成果，結合孔道網路理論，分析了乾燥本身的濕分遷移特徵，模擬研究了多孔介質在等溫條件下不考慮重力時的乾燥過程。 -
Abstract : with adopting of a frame of the principal fibre bundle. the article constructs a unified model of gravity and electromagnetic with torsion both in internal sp ace and in four - demensional space - time. the curvature on the bunde is calcula ted using connection theory in the principle fibre bundle. the action is construc tod with the curvature. the field equations are achieved. finally a discussion is made
文摘:應用纖維叢理論，在內部空間和四維時空引入撓率，建立了引力與電磁場的統一模型.利用纖維叢聯絡論求出主叢的標曲率，由它構造作用量，求得場方程，最後作一些討論 -
This model studies the mixture forming process and simulates the specific gravity of the mixture in the pipeline under the different dredging conditions and work parameters, then refers the technical data in a real dredging project to make some simulation examples. in the end, based on this theory, some useful suggestions are given for efficient dredging. 2
該模型研究了在不同的疏浚環境和作業方式下吸口處泥漿的形成過程和計算泥漿比重的模擬模型，隨后結合實際工程數據給出了模擬實例，最後闡述了該模型對優化疏浚作業方法的指導意義： 2 、泥泵與管路系統。 -
Based on the theory of inverse analysis in mechanics and engineering and combined with the concrete gravity dam of manwan hydro power plant, a back - analysis model including the prior information was built and artificial neural network ( ann ), according to which powerful nonlinear mapping ability, was used to predict the future physical parameters of the concrete
在此基礎上，以大規模有限元分析軟體ansys為平臺，二次開發了漫灣水電站砼重力壩運行狀態分析系統，根據大壩運行監測資料，對該電站大壩進行了砼力學參數反分析、砼力學參數預測分析以及大壩運行狀態分析。 -
On the basis of optimum control solution theory, the dynamic parameter discernment model of concrete gravity dam under the priori restraint conditions has been set up and a restraint variable - dimension method for finding the solutions of such model has been put forward
基於最優控制解的理論，建立了引入先驗約束條件的混凝土重力壩動態參數識別模型，提出了求解該模型的約束變尺度方法。 -
Based on the response theory of an elastic earth to surface loads and the model of the standard atmosphere, the characteristics of changes in the loading effects with time, space and frequency are comprehensively investigated in this dissertation. the numerical results obtained in this study can provide accurate atmospheric correction models for high - precision continuous measurements of the geophysical fields such as gravity, tilt, displacement and strain on the earth ' s surface
本文基於彈性地球對表面負荷的響應理論和標準大氣模型，綜合研究大氣負荷效應的時間、空間和頻率特徵，為地表重力、傾斜、位移和應變等物理場的高精度連續觀測提供精密大氣影響改正模型 -
On the basis of application of machinery and power - generating product design, this paper analyzes and quantifies the theory of equilibrium and stability via analyzing the pictures of product, which is one of aesthetics standard method in design process. therefore, the theory of visual gravity and its calculating model are advanced. with applying the technology of detecting edges and gray histogram, the required image information cire picked up
在機電產品造型設計應用的基礎上，論文從實際產品的照片分析入手，重點對設計應用到的美學法則? ?均衡與穩定理論，進行分析與量化研究，提出了有關機電產品設計的視覺重心理論與計算的框架模型；運用圖像處理中的邊緣檢測與灰度直方圖技術，提取操作需要的圖像信息；綜合產品的形態與色彩，分別結合視覺張力與力矩平衡理論提出了兩種演算法；建立了產品視覺重心計算的相關模型並在solidworks平臺上用vc + +編程實現。 -
It mainly introduced elementary theory of the trade gravity model, the challenge of trade gravity model development facing and trade gravity model ’ s application. and it proposes research steps of this article in the above research foundation : we selects correlation data of our country with 151 main trade partners composing panel data in 1992 - 2003, carries on the test to the gravity model of china ’ s foreign trade, and analyses the choice of export location, in the hope of getting more accurate conclusion, and offering scientific basis for the formulation of our country ’ s foreign trade policies ; the second part, the establishment and test of gravity model about china ' s foreign trade. the text sets up the gravity model which studies china ' s foreign trade in seven regions and examines the actual conditions of china ' s foreign trade flow with panel data
本文共分四大部分，第一部分，貿易引力模型及其應用，主要介紹了貿易引力模型的基本理論、貿易引力模型發展面臨的挑戰和貿易引力模型的應用，並在上述研究的基礎上提出了本文的研究思路:選取1992 - 2003年我國同151個主要貿易夥伴的相關數據組成面板數據，對我國對外貿易引力模型進行檢驗，並對出口區位進行選擇，以期得到更為精確的結論，為我國制定對外貿易政策提供科學依據;第二部分，我國對外貿易引力模型的建立和檢驗，在這一部分按中國的貿易夥伴國分七大區域建立了研究中國對外貿易的引力模型，並運用面板數據對中國對外貿易流量的實際情況進行檢驗。 -
The research work involves several aspects as follows : 1 by the application of gray theory, gm model was established to analyze, develop and forecast the changing disciplinarian and relationship among all random variables of gravity dam, and it is applied to analyze the time - depended reliability of structure
具體工作主要有： 1應用了灰色理論，建立了gm模型對重力壩各隨機變量的發展變化規律及其相互關系進行了分析、補充及預測，並應用到結構可靠性分析中對結構進行時變可靠度分析。
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