氦原子基态能量的变分计算

在用变分法研究氦原子基态能量和波函数过程中,放弃选用两个相同类氢原子基态波函数乘积作为氦原子基态尝试波函数的方法,而是选取三参数的尝试波函数对氦原子体系的非相对论基态能量进行了数值计算,计算结果与实验值相当接近.     

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.     

（He2Pb）^＋团簇的量子力学方法研究

本论文介绍了排列通道量子力学方法（MACQM）的计算步骤,讨论了（He2Pb）^＋团簇的形成机理,并且采用排列通道量子力学方法对（He2Pb）^＋团簇基态能量进行计算,为研究氡子体团簇基态能量提供了全新的计算方法。     

类氢杂质InAs量子环的基态和激发态能级

利用B样条技术计算类氢InAs类氢杂质量子环基态和激发态能级的量子尺寸效应.当抛物势ω=0和ω=50meV时,基态能量的计算结果为常数E0,0=-4.98meV;当r0=0时,且无类氢杂质时,计算结果和精确的理论计算结果完全一致;当量子环较小时,杂质的库仑势对量子环的能量曲线Enr,m——r0影响较大;当量子环较大时,杂质的库仑势对量子环的能量的影响越来越小,库仑项可以近似地作为微扰项来处理.抛物禁闭关联势-μω02rr0对量子环的能量起关键作用,绝对不可能作为微扰项处理.量子环的基态和激发态随着抛物势ω的增加而增大.保持径向量子数nr不变,小量子环的能级随着角量子数｜m｜不同而明显分开,简并被破坏;当量子环变大时,基态和激发态的能级都趋于简并.     

Pr:YIG晶体基态磁矩的理论研究

本文用量子理论计算了PrY2Fe5O12（Pr：YIG）晶体中Pr3＋离子的基态磁矩及其温度特性，结果表明，Pr3＋离子的4f2组态的晶场能级中最低两个能级相差很小，在超交换作用下，这两个能级的波函数发生较强的混合，从而导致基态磁矩。温度在40K－300K范围内，计算结果与实验结果相符较好。     

B样条函数基在半导体微晶量子尺寸效应研究中的应用

用有效质量近似模型来描述微晶CdS和CdSe系统中激子的行为，考虑到介电常数在量子点内外的不同，展示B样条函数基在构成激子波函数中的优越性，讨论激子的基态能量随量子点半径变化的量子尺寸效应．将计算结果与实验结果及其他理论计算结果进行比较，计算结果表明：用B样条函数基构成激子波函数是十分成功的，计算激子的能量与实验符合得很好；当同种量子点处在不同环境时，不仅势垒高度和库仑相互作用能不同，而且激子的有效质量也不同；有效质量近似模型可以很好地描述激子的基态能量的量子尺寸效应．     

Li~+非相对论基态能量的Hartree近似方法计算

将Hartree近似方法应用于类氦离子的试探波函数,对L i+的非相对论基态能量进行计算并于实验值相比,误差仅为0.8%,得到较为满意的结果.此方法为原子物理中相关能的计算提供了可靠的理论模型。     

受δ(x)势微扰的一维无限深方势阱中粒子的能级与波函数

详细计算了δ(x)势微扰下一维无限深方势阱中粒子能级的一、二、三级和波函数的一、二级修正。     

叠加势函数V（r）=A_6r~6＋A_5r~5＋A_4r~4＋A_3r~3＋A_2r~2＋A_1r＋（B_4/r~4）＋（B_3/r~3）＋（B_2/r~2）＋（B_1/r）schrodinger方程的解析解

根据波函数的有限性和叠加势函数的渐近性质,通过待定叠加势波函数的设定,得到势函数表示为V（r）=A6r6＋A5r5＋A4r4＋A3r3＋A2r2＋A1r＋Br44＋Br33＋Br22＋Br 1的schrodinger方程的精确的能量本征值和本征波函数。     

CuC~+和CuN~+基态的分子结构与光谱属性

在Cu的有效核势近似下,利用密度泛函理论的B3LYP方法,对CuC^＋和CuN^＋基态的平衡结构进行了理论计算,并对两者基态的势能面进行了单点能扫描.计算结果表明,两者在平衡位置附近（0.75Re-2Re）的势能曲线能用Dunham函数来拟合.同时计算了CuC^＋和CuN^＋基态的光谱常数,并把得到的光谱常数与已有的结果进行了比较.部分光谱数据是第一次给出报道.     

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.     

团图为数的图中的闭团贯数

Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.     

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.