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in the mass相关的网络例句

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In this thesis the process of constructing the non-perturbative Hamiltonian theory is de-scribed and is applied to estimate the vacuum condensate. It contains the following contents:At the very beginning, by using the path integral method and eliminating the gluon freedom, aGCM action 〓 of current quarks including lower order current-current coupling was derivedfrom the QCD Lagrangian and the effective Hamiltonian operator that could hardly be doneby the normal methods was derived. After doing this, the broken vacuum is introduced whichincludes quark-antiquark condensate through the generalized Bogoliubov-Valatin transformation,the effective Hamiltonian of constituent quark was derived. The detailed formulas containingthe spatial current-current coupling term for the effective Hamiltonian and gap equations wasworked out by parameterizing the correlation kernel as a quadratic potential. And then, the gapequation was solved and the quark-antiquark condensate of vacuum was studied both in the casesof instantaneous interaction and retarded interaction. In the end, the effective Hamiltionian withtwo-body quark-quark interaction was derived with one-body approximation, and with the helpof the functional integral method the coupling non-linear dynamic equations for systems withnuclear matter was derived. Finally, these equations were solved by selfconsistent method andthe effect of nuclear matter on vacuum condensate was studied. The spatial current-current coupling term is too difficult to handle, hence the correlationkernel is assumed to be not important and usually omitted in the pure vacuum condensate, andthe instantaneous interaction generally is adopted. Retaining the spatial current-current termand partial retardation effect, the quark pairs condensate in pure vacuum was studied, and theeffect of quark mass was also studied. At present, little study is focused in the case with nuclearmatter and spatial current-current term also omitted. Under the approximation with partialspatial current-current term, the effect of nuclear matter on vacuum condensate was studied.

本论文描述了量子色动力学整体色对称模型哈密顿量方法的构建过程,得到了反映正反夸克对凝聚真空结构的关于组分夸克的有效哈密顿量算符,它隐含了胶子作用,并且准确至流-流耦合项;接着,通过参数化哈密顿量中的夸克作用关联核,导出平方禁闭势参数化选择的哈密顿量的具体公式和能隙方程;随后,应用公式,编程求解,考察了瞬时作用下和部分延迟作用下真空的正反夸克对凝聚,在计算中保留了空间流-流耦合作用;之后,导出瞬时势和延迟势下包含二体作用项的哈密顿量公式,并采用单体化近似,通过泛函变分方法得到核物质存在时耦合的非线性动力学方程;在保留部分空间双流耦合作用的近似下,求解核物质的动力学方程,考察核物质密度对真空凝聚的影响,以往考察真空凝聚,对关联核的选用,由于空间流-流耦合项不易处理,也认为作用不大,常忽略该项,并且常采用瞬时作用;本文保留空间双流项和部分延迟作用,考察了真空情形的夸克对凝聚,还考察了夸克质量对纯真空凝聚的影响,以往对核物质存在情形的真空凝聚考察很少,也都忽略空间流-流项,本文在考虑部分空间流-流项近似下,考察了核物质存在对真空凝聚的影响。

We've all learned about the courageous acts of former slaves in American history like Frederick Douglass and Harriet Tubman—but while the Emancipation Proclamation of 1863 officially put an end to slavery in the United States, human trafficking is still at critical mass and rising in many parts of the world, with more than 27 million people enslaved today.

我们对于美国前奴隶及废奴主义者弗雷德里克·道格拉斯,海丽特·塔布曼的英雄事迹早已耳熟能详——但尽管1863年制定的《解放黑奴宣言》官方上终止了美国的奴隶制,却没能从根本上阻止全世界各地贩卖人口的恶潮,直到今天,仍有超过两千七百万的人遭奴役。

Study on heat and mass transfer through fabrics is very important in the field of human thermal.

人体在着装情况下的热湿传递现象对人体的热舒适性的研究有着很重要的地位。

In the developing of these forms of TV program, we can find the trace of the "Truman Show", but it does not express itself until the mass culture enters into its prosperous day, the day when we are living in an era of after-industry, in a cultural of hedonics, consumption, and experience.

其实,在这些电视节目形态中,早就有"真人秀"的影子,但是直到人类进入后工业时代的大众文化成熟期,在快感文化、享乐文化、体验文化、消费文化的主导下,在资本的直接孕育下,"真人秀"才显示出它的强大生命力。

There is a heterogeneous mass of papers in the teacher's office.

老师的办公室里堆满了大批不同的论文。

Mass on Holy Thursday is celebrated in the evening.

弥撒圣周四是庆祝在傍晚。

There is a relatively complete style of homogeneous function about the boundary condition in the problem of sure resolution of unhomogeneous boundary condition,which is based on the summarizing of mass former experiences and is proved in this article.

通过对非齐次边界条件的定解问题的讨论,引出了本文的论题,对非齐次边界条件定解问题的边界条件齐次化函数提出了一种比较一般和标准的形式,并提出了一个定理。对该定理进行了证明,证明了它的正确性。

Now they have something else in common: this week both announced a further round of mass lay-offs. On November 17th Vikram Pandit, Citi's boss, said his bank would shed a whopping 52,000 jobs in the next few months, bringing the total number of planned job cuts to 75,000, or 20% of the bank's workforce. On November 18th Chip Hornsby, Wolseley's boss, announced another 2,300 job cuts at his firm.

现在他们在某事上有共同之处了:本周这两家公司都宣布了新一轮的大规模裁员。11月17日,花旗的老总Vikram Pandit表示在接下来的几个月中他们将裁剪52,000个职位;这一举措将计划裁员数增加到了75,000个,相当于整个银行职工总数的20%。11月18日,沃尔斯利的老板Chip Hornsby又宣布了另外2300个职位裁减的决定。

Unpicking the mass of decisions and entrenched interests involved in this growth model is a huge undertaking.

理顺这种增长模式所涉及的大量决策和既得利益,将是一项艰巨任务。

These results indicated that a well structured anatase TiO2 was obtained by impregnation method under 500℃. Flow rate, in the activity test, could be neglected for mass transfer effects. As a matter of fact, relative humidity played the most important role in this reaction. The highest removal efficiency was obtained while relative humidify of 56.8%. Water molecules are sources of ; however, excessive water molecules could inhibit reactions by competing activity sites with organic containments. In the regeneration test, photocatalyst could be reactivated through a running water vapor with UV light illumination process.

研究结果指出,以含浸法制备之触媒於500℃锻烧下,具有良好的锐钛矿晶体结构;另外在活性测试的部份,流量的增加,污染物之去除效果不受影响,所以本实验选择以200ml/min之流量可忽略质传影响;湿度扮演重要的角色,当RH=56.8%时去除效率最高,主要因水气是产生氢氧自由基的主要来源,但是过多之水气可能与有机物竞争触媒表面上的活性位置,因而抑制反应的进行;初使浓度对去除率之影响中得知,初使浓度的高低不会影响触媒对有机物的催化能力,实验使用之触媒量适合催化200~250ppm之有机物,可藉由增加触媒量提高对有机物之催化能力;此外再生的测试,触媒可经由连续曝水及紫外光的照射,使触媒恢复原有的活性,可再次利用。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力