Firstly, using strategy of introducing associated auxiliary equation to a givenpartial differential equation without admitting Lagrangian, we make the extendedequations possess a variational principle. Based on this, the concepts of extendedconservation law and extended symmetry to given partial differential equationare put forwarded.

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This makes more and more people pay more attention to studies and applications of numerical simulation in thermal recovery. In this research, we have developed a reliable mathematical model for thermal recovery, which takes a full consideration of the effect of viscos, gravitical and capillary forces on the three-phase flow of gas, water and oil, the effect of the temperature on the medium characteristics of liquid and solid, the phase equilibrium of gas-liquid in each component, heat transportation including connection, conduction and radiation as well as heat losses in both the overburn and underlying strata. In the space discreation of the mathematical model, we have proposed a new method based on the improvement of the conventional nine-points difference approximation, which has a higher difference accurancy.

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Multiple blood samples were taken for measurement of the time course of the drug concentrations, and the electrocorticogram processed (approximate entropy, for propofol and methohexital and percentage high frequency time, for ketamine) to numerically quantify drug effect.

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Developments in physics since the time of Newton make the law of momentum conservation appear to be more fundamental than Newton's third law.

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To use the field concept and its language consistently, we must regard the magnetic field as a store of energy. Only in this way shall we be able to describe the electric and magnetic phenomena in accordance with the law of conservation of energy.

為了一致地應(yīng)用場(chǎng)的概念和它的語言久久国产午夜一区二区福利，我們必須將磁場(chǎng)當(dāng)作能的儲(chǔ)存所欧美视频在线中文字幕，只有這樣才能使我們能夠按照能量守恒定律來描述磁和電的現(xiàn)象。

In Chapter 3 relaxation in growth with a conservation law is studied, and reduced roughness of the surface due to the effect of relaxation is found. The last chapter includes discussions of point defects in conservational surface growth.

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EMHYDR HR oils have excellent oxidation stability and demulsibility, enabling ready separation of entrained water and giving long life without formation of harmful sludge.

守恒定律使我們能夠就可得出有關(guān)原子穩(wěn)定性的具有深遠(yuǎn)意義的結(jié)論性生爱视频免费网站，而不需要對(duì)原子核內(nèi)起作用的力作任何假設(shè)。

Based on the analysis of current oscillation region of stable electric fielddomains in I-V curve,it is shown that when the applied bias voltage is changedwithin positive slope regions of I-V curve,the domain boundary between the high-and low-electric field domains does not moved,and the size of electic fielddomains regions is also not altered,while the electric filed strengths are adjusted tokeep the current conservation.

通過對(duì)穩(wěn)態(tài)電場(chǎng)疇情況下I-V曲線中電流振蕩區(qū)域的分析人人上人人操人人干，證明當(dāng)外加偏壓在正微分電導(dǎo)區(qū)變動(dòng)時(shí)五月天无码视频，超晶格的高低電場(chǎng)疇之間的疇邊界不發(fā)生移動(dòng)，疇的大小不變亚洲图片小说视频综合网首页，只是相應(yīng)的電場(chǎng)強(qiáng)度做些調(diào)整以使電流守恒成立看真人黄色录像。

gyrocompass：陀螺羅盤

這一特性形成陀螺羅盤(gyrocompass)和其他導(dǎo)航設(shè)備的基礎(chǔ). (2)進(jìn)動(dòng),即當(dāng)羅盤儀受一力矩欲使之改變方向時(shí),它會(huì)繞一軸轉(zhuǎn)動(dòng),該軸垂直于施加力矩的軸和羅盤儀的自族主軸. 這是使角動(dòng)量(angular momentum)守恒的結(jié)果.

pair production：成對(duì)產(chǎn)生

結(jié)合能(binding energy)也可依此測(cè)得. 這個(gè)強(qiáng)作用力使粒子與粒子可互相結(jié)合在一起,質(zhì)量損失愈大代表其結(jié)合能也越大. 質(zhì)量守恒定律也能應(yīng)用在系統(tǒng)結(jié)合時(shí)的能量守恒與動(dòng)量守恒上,并且也能解釋粒子的成對(duì)產(chǎn)生(Pair production).

retain: v.1：保留;保持 2.擋住,攔住

transplantation: n.1.移植,移種 2.殖民 | retain: v.1.保留;保持 2.擋住,攔住 | conserve: v.1.保護(hù),保存(藏) 2.使守恒,使不滅