双模双光子JC模型伴随Stark效应光场压缩特性

在考虑了Ｓtark效应的Ｊaynes-Cummings模型下,导出了双模双光子系统状态的时间演化波函数,在有效Ｓtark分裂系数β１和β２相等、不相等两种情况下,分别讲座了双模光场的压缩性质,发现对双模光场而言,原子初始处于基态诱导双模光场压缩,双模光场的压缩效应依赖于原子的叠加态及原子和场相干态的相对相位,而Ｓtark效应又使得这种依赖关系发生变化。     

Mssbauer Studies of the Atomic Short-Range Order (SRO) and the Electron Transfer in Amorphous TM-M Alloys

The Mossbauer spectra of amorphous alloys Fe_(80)B_(20)-_xM_x (M=P, C, Si, Ge) at room temperature and at 4.2 K have been measured. It is found that the mean values of the hyperfine field and the isomer shift vary linearly when M substitutes for B. According to these results and those of their crystalline counterparts, it is shown that there does not exist a microcrystalline short-range order in the amorphous alloys investigated and that thc 4s electrons of iron take part in lhe charge transfer.     

先锋小说及先锋派创作的转向

20世纪80年代先锋小说的大规模出现,是中国文学发展史上的一件大事,对中国当代文学的创作与发展产生了深远的影响."先锋"从其定义来看,有一个复杂的发展变化过程,但其实质则是不断地创新.先锋小说的发展有一个不可回避的问题,就是现代主义与先锋小说的关系.先锋小说作家对这一问题的回避,是一个很值得探讨的问题.由于先锋小说自身存在的某些问题,为先锋小说的转向埋下了伏笔.先锋小说的转向可以从新写实主义的影响及世俗的诱惑这两个方面来考虑.     

帽形加劲复杂卷边槽钢柱偏压性能试验研究

对共计18个简支试件进行偏心受压试验,分析并研究了未加劲、腹板中央帽形加劲、腹板和翼缘中央帽形加劲3种截面复杂卷边槽钢的极限承载力、失稳模式及变形特征等特性.结果表明:有效形心移动对偏心承压构件的承载能力有很大影响.在板件中央设置帽形加劲可以适当减小板件的宽厚比,显著提升受压构件的极限承载力及钢材利用率,但畸变屈曲在构件失稳模式中起控制作用.在同等条件下,板件中央帽形加劲偏压构件的承载效率提升了15%~70%.     

一种求解动边界问题的有限单元-有限差分法

本文从二维动边界着手,将在动边界上应满足的能量平衡条件——非线性边界条件从数学模型中分离出来,然后用有限元法求解区域上的温度分布,用有限差分法求解大型的非线性方程组,减少了计算工作量,提出了求解动边界问题的有限元-有限差分法。用本文提出的方法分别给出了一维和二维动边界问题的数值结果,并与分析解或其它研究者的结果进行比较,验证了本文方法的可靠性和有效性。     

光波的两种频移

本文分析光波在引力场中的频移，讨论光波多普勒效应频移的普遍公式，运用光波频移探讨宇宙的模型。     

Best weight pattern evaluation based security constrained power dispatch algorithm

This paper presents a methodology which determines the allocation of power demand among the committed generating units while minimizes number of objectives as well as meets physical and technological system constraints. The procedure considers two decoupled problems based upon the dependency of their goals on either active power or reactive power generation. Both the problems have been solved sequentially to achieve optimal allocation of active and reactive power generation while minimizes operating cost, gaseous pollutants emission objectives and active power transmission loss with consideration of system operating constraints along with generators prohibited operating zones and transmission line flow limits. The active and reactive power line flows are obtained with the help of generalized generation shift distribution factors （GGDF） and generalized Z-bus distribution factors （GZBDF）, respectively. First problem is solved in multi-objective framework in which the best weights assigned to objectives are determined while employing weighting method and in second problem, active power loss of the system is minimized subject to system constraints. The validity of the proposed method is demonstrated on 30-bus IEEE power system.     

Phase equilibria of HP–UHP mica-schists in Jiangling, Eastern Dabieshan orogen

The HP–UHP metamorphic terrane of Jiangling, eastern Dabieshan comprises extensively distributed granitic gneisses, mica-schists and numerous eclogite blocks. The mica-schists generally contain garnet, phengitic muscovite, biotite, plagioclase, quartz, rutile and a small amount of epidote and hornblende. Study on petrography and phases equilibria in the NCKMnFMASH system indicates that the present mineral assemblages in mica-schists are not in equilibrium. The earlier stage of mineral assemblage represented by garnet and phengite reflects a HP–UHP condition. The garnet compositions and the phengite Si contents give a PT condition of 580–600℃ at 2.6–2.8 GPa. The garnet zonation records an earlier progressive metamorphic process which may be associated with the appearance of glaucophane, jadeite and lawsonite. The later stage of mineral assemblage characterized by the presence of biotite and plagioclase reflects a PT condition of 620–635℃ at 0.9–1.1 GPa, belonging to the HP amphibolite facies. The main mineral assemblage in micaschists from the Jiangling region has recorded a complete HP–UHP metamorphic process.     

关于非简谐振子双基态及其能级的讨论

通过严密推导得出非简谐振子各算符间的对易关系及其对能量本征态的作用。导出了参数Ａ满足的条件和非简谐振子基态能量表达式，并讨论了参数Ａ与非简谐振子基态能量之间的关系。