作者: TAG 時間: 2025-3-21 23:09
Some Limit Theorems on Simulated Annealing,lation as in that chapter in a frame of reference moving with the flow velocity. However, that approach cannot be easily generalized to more complicated cases. Therefore, it is better to consider the mass balance for a (stationary) elementary control volume shaped as a slice which covers the entire river cross-section . over a length Δ..作者: 抗原 時間: 2025-3-22 00:28 作者: Dysarthria 時間: 2025-3-22 07:04 作者: Genistein 時間: 2025-3-22 09:41 作者: 一瞥 時間: 2025-3-22 15:16 作者: 一瞥 時間: 2025-3-22 20:45
Stochastic Multi-Stage Optimizationation; however, this concentration varies in longitudinal direction. This is called the well-mixed case. The salt concentration is now governed by the convection-diffusion equation (11.4) with two complications:作者: 后天習(xí)得 時間: 2025-3-22 21:46 作者: 外星人 時間: 2025-3-23 04:42 作者: 存心 時間: 2025-3-23 06:47
Monitoring Changes in RCA Modelshe simple-wave equation without a decay term. If α=1, you get the method of Lax; therefore the general case can be called a modified Lax method. The difference equation used in section 4.2 is a special case α=0.作者: 陶器 時間: 2025-3-23 09:55 作者: 刺耳 時間: 2025-3-23 14:16 作者: 防水 時間: 2025-3-23 21:44 作者: Macronutrients 時間: 2025-3-24 01:53
https://doi.org/10.1007/978-3-319-18138-7 this book. There are, however, certain situations in which they can be considerably simplified. Consider a quantity called the vorticity ., which is a measure of the rotation of a fluid particle about its axis (normal to the plane of flow; in 3-d the vorticity is a vector).作者: Ankylo- 時間: 2025-3-24 02:56 作者: Excitotoxin 時間: 2025-3-24 08:19 作者: 極小量 時間: 2025-3-24 13:04 作者: 死貓他燒焦 時間: 2025-3-24 17:56 作者: MAUVE 時間: 2025-3-24 20:37 作者: 厚顏 時間: 2025-3-24 23:38
https://doi.org/10.1007/978-3-319-18138-7e for suspended sand is . in which the sediment flux in vertical direction is . where . and . are the horizontal and vertical coordinates, . is the turbulent diffusion coefficient and . the settling velocity or fall velocity of the sand particles.作者: 金絲雀 時間: 2025-3-25 03:42 作者: 愛國者 時間: 2025-3-25 09:20
Salt Intrusion in Estuaries,ation; however, this concentration varies in longitudinal direction. This is called the well-mixed case. The salt concentration is now governed by the convection-diffusion equation (11.4) with two complications:作者: Agronomy 時間: 2025-3-25 13:47 作者: chassis 時間: 2025-3-25 19:43 作者: GROSS 時間: 2025-3-25 20:29 作者: 變色龍 時間: 2025-3-26 00:22 作者: 泥沼 時間: 2025-3-26 04:56
Numerical Solution for Box Model,ow or the waste discharge varies in an arbitrary way, this is no longer so. Moreover, in many applications of box models the equations will not be so nicely linear. In general, you will need numerical techniques and these can be illustrated very well for the water quality example.作者: GULLY 時間: 2025-3-26 11:31
Transport of a Dissolved Substance,ected. This is not very realistic, but you will find more about that in later chapters. The consequence is that the substance is carried with the packet of water in which it was discharged, see Fig. 4.1. If the discharge takes a time ., the length of the packet is ., where . is the flow velocity. Af作者: Calculus 時間: 2025-3-26 15:23 作者: Expand 時間: 2025-3-26 20:48 作者: FLOAT 時間: 2025-3-26 23:31 作者: 瘋狂 時間: 2025-3-27 04:11
,Convection—Diffusion,mber of causes by which a substance (such as salt or a waste material but also temperature) is spread out in addition to being transported with the mean flow: molecular diffusion, turbulent mixing, and (very importantly) variations of flow velocity over the river cross-section. For a detailed discus作者: 枕墊 時間: 2025-3-27 05:30
,Numerical Accuracy for Convection—Diffusion,s gets quite complicated, as an additional parameter (the Courant number) comes in. For practical purposes, it is often sufficient to consider diffusion and convection separately, and in that order. The procedure is then:作者: 煩擾 時間: 2025-3-27 11:20
Salt Intrusion in Estuaries,influence. If there is hardly any tide, the salt water will penetrate underneath the fresh river water as a “salt wedge”. Far more common is the situation where a strong tidal action takes care of a mixing process, such that the water in a particular cross-section has an almost uniform salt concentr作者: 食物 時間: 2025-3-27 17:06
Boundary Layers, bottom at sufficiently high velocity, sand will be picked up and carried with the flow, even though it tends to fall back. The process by which sediment particles are kept in suspension is turbulent diffusion. Just as in chapter 11, turbulence causes an effective transport from regions with high sa作者: 木訥 時間: 2025-3-27 18:04
Long Waves,cal formulation can be obtained by integrating the general hydrodynamic equations over the depth or over a river cross-section. To understand the principles, it is sufficient to use a very much simplified set of equations in this chapter and the next one. For completeness, some of the corresponding 作者: 傻 時間: 2025-3-28 01:24 作者: Calculus 時間: 2025-3-28 03:07
Long Waves in Two-Dimensional Areas, flood plains and similar situations. In many such cases, the wave length is so much larger than the water depth that a two-dimensional, depth-averaged mathematical model is adequate. The formulation is essentially the same as in Chapters 15 and 16, if the dependence on two horizontal coordinates .,作者: 財主 時間: 2025-3-28 07:29
Potential Flow,ise there is an additional, similar equation), together with the equation of continuity .The numerical solution of these equations is not discussed in this book. There are, however, certain situations in which they can be considerably simplified. Consider a quantity called the vorticity ., which is 作者: 性滿足 時間: 2025-3-28 12:22
Variational Calculus on Lie Groups,mediate between purely theoretical and experimental. It is concerned with simulation of the flow of water, together with its consequences, using numerical methods on computers. There is not a great deal of difference with computational hydrodynamics or computational fluid dynamics, but these terms a作者: 暫停,間歇 時間: 2025-3-28 15:37
Piero Barone,Arnoldo Frigessi,Mauro Piccioni The type of model is called a “box” model and it is governed by ordinary differential equations. In the simplest case, there is just one first-order equation and the system is accordingly called a first-order system.作者: 燕麥 時間: 2025-3-28 19:23
John T. Kent,Christopher Wrightow or the waste discharge varies in an arbitrary way, this is no longer so. Moreover, in many applications of box models the equations will not be so nicely linear. In general, you will need numerical techniques and these can be illustrated very well for the water quality example.作者: objection 時間: 2025-3-29 01:32
Some Limit Theorems on Simulated Annealing,ected. This is not very realistic, but you will find more about that in later chapters. The consequence is that the substance is carried with the packet of water in which it was discharged, see Fig. 4.1. If the discharge takes a time ., the length of the packet is ., where . is the flow velocity. Af作者: Ferritin 時間: 2025-3-29 05:48 作者: Intervention 時間: 2025-3-29 07:42
Detection of Changes in Binary Sequencestake into account that an arbitrary function, acting as initial condition, can be thought to be built up from a series of sinusoidal functions, which is called a Fourier series. As an example take a block function with length 2. (Fig. 8.1).作者: MUTED 時間: 2025-3-29 12:18
Aki Ishii,Kazuyoshi Yata,Makoto Aoshimaed incompressible. The reason is that the grains can move relative to one another, such that the pore volume changes. The water in the pores has to flow in or out, which takes some time. This process of consolidation is therefore time dependent. For a more comprehensive discussion see Verruijt (1983作者: 協(xié)奏曲 時間: 2025-3-29 17:16
https://doi.org/10.1007/978-1-4612-5883-4mber of causes by which a substance (such as salt or a waste material but also temperature) is spread out in addition to being transported with the mean flow: molecular diffusion, turbulent mixing, and (very importantly) variations of flow velocity over the river cross-section. For a detailed discus作者: 五行打油詩 時間: 2025-3-29 22:42
The M/M/s Queue Length Process,s gets quite complicated, as an additional parameter (the Courant number) comes in. For practical purposes, it is often sufficient to consider diffusion and convection separately, and in that order. The procedure is then:作者: 考得 時間: 2025-3-30 03:32 作者: kidney 時間: 2025-3-30 04:19 作者: Priapism 時間: 2025-3-30 08:19
https://doi.org/10.1007/978-3-319-18138-7cal formulation can be obtained by integrating the general hydrodynamic equations over the depth or over a river cross-section. To understand the principles, it is sufficient to use a very much simplified set of equations in this chapter and the next one. For completeness, some of the corresponding 作者: ARBOR 時間: 2025-3-30 13:51 作者: STELL 時間: 2025-3-30 19:44
Probability Theory and Stochastic Modelling flood plains and similar situations. In many such cases, the wave length is so much larger than the water depth that a two-dimensional, depth-averaged mathematical model is adequate. The formulation is essentially the same as in Chapters 15 and 16, if the dependence on two horizontal coordinates .,作者: labile 時間: 2025-3-31 00:19 作者: PLUMP 時間: 2025-3-31 04:47 作者: 放氣 時間: 2025-3-31 06:20 作者: organic-matrix 時間: 2025-3-31 10:34 作者: 糾纏 時間: 2025-3-31 14:06 作者: Fresco 時間: 2025-3-31 20:48
Probability Theory and Stochastic Modellingon with one unknown. However, for the general equations given in appendix 1, this is much more complicated and moreover not very useful. The straightforward way is to discretize the equations directly. To this end, a grid in the . plane is chosen with spatial grid size Δ. and time step Δ. (Fig. 16.1).作者: 臨時抱佛腳 時間: 2025-3-31 21:52
http://image.papertrans.cn/c/image/232347.jpg作者: 割讓 時間: 2025-4-1 05:32
Water Quality in a Lake, The type of model is called a “box” model and it is governed by ordinary differential equations. In the simplest case, there is just one first-order equation and the system is accordingly called a first-order system.作者: 看法等 時間: 2025-4-1 09:24 作者: 因無茶而冷淡 時間: 2025-4-1 12:34
Numerical Accuracy for Diffusion Problems,take into account that an arbitrary function, acting as initial condition, can be thought to be built up from a series of sinusoidal functions, which is called a Fourier series. As an example take a block function with length 2. (Fig. 8.1).
