理想气体化学势μ的统计属性

计算出弱简并理想气体的化学势μ，与非简并理想气体和简并性理想气体的化学势μ比照发现，理想气体的化学势μ随温度丁而减小，且是粒子数密度n(=N／V)的函数；结合所导出的多元系粒子的最概然分布，揭示了理想气体化学势μ的统计关联本质．     

用粒子数表象处理非简并定态微扰问题

运用粒子数表象,解决了微观粒子受到外界微扰作用时能量的二级修正和波函数的一级修正,避免了繁杂的运算.     

利用产生、湮灭算符构造费米系统的波函数

讨论了费米系统在中心力场中运动时,从单粒子能级εj上一对费米子出发,构造了单泣子态的产生、湮灭算符．然后引入总粒子数算符,利用产生、湮灭算符构造了k对费米子的波函数,并进行了归一化。     

产生算符和消灭算符的应用

本文利用粒子数表象中的产生算符ａ＾＋和消灭算符ａ求出线性谐振子和能级和定态波函数，并和在坐标表象中解定态薛定谔方程来确定系统的定态问题进行比较，从而得出这两种方法在量子力学中具有同等效果的结论。     

非对易空间中Klein-Gordon振子的能级与波函数

从Moyal-Weyl乘法出发,介绍了Bopp变换和非对易空间的量子力学代数关系,在考虑坐标—坐标非对易性的情况下,讨论了非对易空间中Klein-Gordon振子的波动方程,利用坐标变换,重新定义了产生-消灭算符,并由此给出了Klein-Gordon振子能级的非对易修正及其在粒子数表象和坐标表象中的波函数。     

热力学统计物理中化学势的计算

以能量、熵和吉不斯函数为依托,对化学势进行计算,分别对理想气体、玻色气体的化学势进行了理论推导,得到了其化学势与温度及压强的确定函数关系,并分析了化学势在玻色-爱因斯坦凝聚现象中的一些应用.进而用matlab语言编写相关计算程序,计算出费米气体的化学势等,并介绍化学势在费米分布中所起到的重要影响.     

化学势(μi)的涵义及其应用

阐述了化学势概念的涵义及一些因素对化学势的影响;阐明了化学势在多组分多相平衡体系及化学反应平衡体系中的应用.     

化学势的取值分析与化学势的作用

本文论述了热力学及统计物理中关于化学势取值的相对性和化学势的作用,特别是对近独立粒子系统分布函数中化学势的正负进行了讨论,并用数字代入方法证明了费米－狄拉克分布中化学势的正负取决于系统的温度高低。     

热力学·统计物理中的化学势

化学势是一个非常重要的物理量,它贯穿热力学与统计物理两部分,它具有能量特征,能从某一侧面反映系统的某一性质;尤其在统计物理中,化学势更是起到了非常重要的作用.本文主要在于厘清化学势的定义,阐明如何用热力学方法和统计物理方法计算理想气体化学势.并在此基础上进一步阐述了化学势的一些重要作用.     

关于辐射场热力学性质的教学

辐射场是光子系统,它遵循玻色——爱因斯坦统计,它的物态方程中的常数σ=(8π~5k~4)/(15h~3c~3),反映了辐射场的量子效应,相对论效应和热运动效应,研究辐射场的性质,将会把电动力学、量子力学统计物理理论联系起来。 应用坡色——爱国斯坦统计法求出光子对能量的分布函数,从而求出诸热力学量。如化学势μ=0,自由能F=-(1/3)ψv,束缚能TS=(4/3)vψ,且大于内能,应用辐射场粒子数不恒定这一性质解释上述热力学函数的物理意义。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…