To reduce the large numerical dispersion error for the alternating direction implicit finite-difference time-domain method, an isotropic ADI-FDTD method with low numerical dispersion error was presented.

針對(duì)交替方向隱式時(shí)域有限差分方法數(shù)值色散嚴(yán)重的缺點(diǎn)18AV视频，提出了一種低數(shù)值色散的各向同性ADI-FDTD方法久久精久久精久久精品99。

The analytical solution of 1-D convectional-dispersion differential equation with the hydrodynamic dispersion coefficients so determined can very well simulate the salt and water movement processes in the soil columns.

采用如此計(jì)算得到的水動(dòng)力彌散系數(shù)D值代入經(jīng)典的一維對(duì)流-擴(kuò)散方程能很好地預(yù)報(bào)飽和土壤的水鹽運(yùn)移求a片网址。

Spectrum control technology and its application researchBasic theory of smoothing by spectral dispersion in high-power laser system was studied. Periodical frequency modulation was obtained by chirped pulse stacking, and novel special gratings were proposed here to obtain angular spectral dispersion and temporal smoothing of focal spot.

并在國(guó)際上首次成功地應(yīng)用于激光聚變高功率激光系統(tǒng)中综合视频区。3久久久久亚洲精品中文字幕A片、激光脈沖光譜控制技術(shù)及應(yīng)用研究研究了高功率激光光譜色散平滑的基本理論色cao在线观看，提出利用堆積啁啾脈沖的周期性光譜調(diào)制特性和新穎特殊光柵實(shí)現(xiàn)光譜角色散和激光束遠(yuǎn)場(chǎng)焦斑的時(shí)間平滑。

Firstly, the isotropic difference templates were introduced to approximate the differential in the ADI-FDTD method, and the weighting coefficients of difference terms were determined for implementing isotropic numerical dispersion; Then the permittivity and permeability were adjusted manually to reduce the numerical dispersion error in any directions. Therefore the simulation accuracy and efficiency can be improved effectively for time domain problems with some finite bandwidths.

該方法在ADI-FDTD方法的差分近似微分中引入各向同性差分模板国内精品一区二区三区香蕉，并通過(guò)確定各向同性差分的加權(quán)系數(shù)來(lái)近似實(shí)現(xiàn)各向同性欧美一级婬片A片护士，然后人為修正空間的介質(zhì)參數(shù)來(lái)減少各個(gè)方向上的數(shù)值色散誤差，因此在模擬一定帶寬的時(shí)域問(wèn)題時(shí)可有效提高計(jì)算精度和計(jì)算效率最近最新中文字幕视频。

This system has function dispersion and can deal with parameter checking, calculation, control strategy, information output and process parameters time-control. These functions will auto-run effectually and reliably that make control dispersion. Fieldbus intelligential model layer in this system is made of a few intelligential models in the fields.

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The contents are: measure and tuning of accelerating cavities, coupling cavities, measure of quality, field distribution, dispersion curve . and the way of measuring and eliminating the stop band, etc. At the same time, utilizing the test data and the dispersion equation of cavity chain, we make a fit dispersion curve by way of least squares fit, and we work out the width of stop band and the intercavernous coupling coefficient.

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The stable or unstable state of the montmorillonite-water dispersion is mainly effected by the properties of montmorillonite, water, and stabilizers as well as their interactions, while the type, the structure, the properties and the concentration of the stabilizer play dominate roles. Based on the molecular designing clues, this research selected three sulfonated copolymers as the stabilizers, i.e. the sodium 2-acrylamido-2-methyl-1propane sulfonate /acrylamide /disodium itaconate terpolymer, the AMPS/AM/N-vinyl pyrrolidone terpolymer and the sodium styrenesulfonate /IA copolymer. The preparation and characterization of the sulfonated copolymers were discussed, the high-temperature stability of the montmorillonitewater dispersion was characterized with the rheology, the filtration, the particle size distribution, the electrostatic properties, and the adorption of the sulfonated copolymers onto montmorillonite particles. At the same time, a systematic mechanism of the hightemperature stabilization of the dispersion was presented.

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The difference of bulk density of coastal soils took an effect on infiltration rate and diffuse rate. The infiltration rate and diffuse rate of coastal soils which bulk density was small were big. The water transmitting experiment of coastal soils showed that the saturated conductivity of different layers in soil profile were great, and the saturated conductivity of undisturbed soil was highly higher than that of disturbed soil. The saturated conductivity of coastal soils embanked earlier was lower than that of coastal soils embanked later. Under different water content, the unsaturated conductivity of coastal soils had a great change and the bulk density had an effect on unsaturated conductivity. The soil with a low bulk density had a high unsaturated conductivity. Chlorine ion moved in coastal soil was an inert ion. The distribution of CU in soil was definite and repeated, which is no relation with the time and velocity of infiltration. The concentration of infiltration solution and the texture of coastal soils had no apparent effect on solute movement synthetic dispersion coefficient, while bulk density took an apparent effect on solute movement synthetic dispersion coefficient. Synthetic dispersion coefficient of coastal soils increased as bulk density decreased.

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Pigments and extenders; methods of dispersion for assessment of dispersion characteristics; part 4: dispersion using a bead mill

顏料和體質(zhì)顏料。評(píng)定分散性的分散方法欧美中文字幕伦交视频。第4部分：用壓研磨機(jī)分散

Aiming to solve the shortcoming in the prior art that any on-line DCF dispersion compensation technology is not provided for long distance, and the nonlinear effect in the dispersion compensation technology is restrained, the invention provides the dispersion compensation method, which includes the steps that after a sending end implements electric pre-compensation treatment on a digital signal to be transmitted, a control electric/optical converter module outputs a distorted optical signal; after receiving the optical signal, a receiving end conducts a post compensation treatment after converting the optical signal into an electric signal, or converts the optical signal into the electric signal after implementing the post compensation treatment.

為了解決現(xiàn)有技術(shù)中長(zhǎng)距離無(wú)在線DCF色散補(bǔ)償技術(shù)的不足和抑制色散補(bǔ)償技術(shù)中的非線性效應(yīng)最新亚洲第一页，本發(fā)明提供了一種色散補(bǔ)償方法，包括發(fā)送端將待發(fā)射的數(shù)字信號(hào)進(jìn)行電預(yù)補(bǔ)償處理后一级毛片免费不卡，控制電/光轉(zhuǎn)換模塊輸出畸變光信號(hào)狂艹美女，接收端收到光信號(hào)后，將光信號(hào)轉(zhuǎn)換為電信號(hào)后進(jìn)行后補(bǔ)償處理午夜在线观看国产剧情视频，或?qū)⒐庑盘?hào)進(jìn)行后補(bǔ)償處理后轉(zhuǎn)換為電信號(hào)的步驟华人AV网站。