排序方式: 共有35条查询结果,搜索用时 125 毫秒
31.
描述了一事三苯基氧胂Ph3AsO.H2O(1)及其与氯化三苯基锡,氯化三对氯苯基锡及氯化三苯基铅配合物「Ph3SnCl(OAsPh3)」(2),「(ClPh)3SnCl(OAsPH3)」(3)和」Ph3PbCl(OAsPh3)(4)的合成和晶体结构,晶体数据分别为(1)单斜晶系,空间群P2、/n,a=9.4604(7),b=16.6347(7),c=11.1544(11)A,B=113.233(6 相似文献
32.
Ramps and sloping roads appear everywhere in the built environment. It is obvious that the movement pattern of people in the sloping path may be different as compared with the pattern on level roads. Previously, most of the studies, especially the mathematical and simulation models, on pedestrian movement consider the flow at level routes. This study proposes a new lattice model for bidirectional pedestrian flow on gradient road. The stability condition is obtained by using linear stability theory. The nonlinear analysis method is employed to derive the modified Korteweg-de Vries (mKdV) equation, and the space of pedestrian flow is divided into three regions: the stable region, the metastable region, and the unstable region respectively. Furthermore, the time-dependent Ginzburg—Landan (TDGL) equation is deduced and solved through the reductive perturbation method. Finally, we present detailed results obtained from the model, and it is found that the stability of the model is enhanced in uphill situation while reduced in downhill situation with increasing slope. 相似文献
33.
34.
本工作共积累了317个非弹性作用事例。作用中的次级带电粒子在(π--N)质心系中的角分布与动量分布等和前人结果一致,并且基本上可以用边缘碰撞机制来说明。对带有次级质子的事例作了如下分析:(1)计算全部次级粒子(质子除外)在它们自己系统中的总能量ω。作ω分布,并与边缘碰撞1π交换近似计算的理论曲线比较,在ω=1.5BeV附近观察到有突出于理论曲线之外的高峯,并对峯区内事例进行了初步分析。(2)综合我们的和联合原子核研究所的数据,计算了次级质子在镜象系的非弹性系数Kз,并使Kз值的分布与根据Барашенков等人理论计算的Kз分布曲线作了比较。此外,还试从靶质量观点出发,利用Duller-Walker的F图方法,对不同Kз值的各类事例进行了分析和讨论。 相似文献
35.
Yang's R-gauge formulation is used to obtain the most general self-dual non-abelian plane wave solutions. 相似文献