The quasi-elastic barrier distribution D〓 extends to low energy region and enhances the fusion cross section at the sub-barrier energies. It is still needed to do some work to determine the deformation parameter β〓 for light odd-odd nucleus, like 〓Li and to calculate all reaction channels by means of CDCC code simultaneously. It is important to measure the exclusive angular distributions of breakup fragments.
得到参数化的和能量相依的相互作用势公式;发现弱束缚核〓Li+〓Pb阈异常与〓Li的形变参数β〓相关,垒下存在强的吸收势;给出破裂对熔合截面的影响在垒上压底垒下增强;熔合势垒分布向低能端展宽,有利于垒下熔合截面增强等结果;对如何确定轻的奇-奇核的形变参量β〓提出了疑问;需解决如何用从弹散角分布抽取的光学势参数,进行CDCC程序全反应道统一描写;迫切需要破裂碎片关联测量的实验数据。
On the basis of four improved aspects, LUNF code is modified to calculate the total outgoing neutron double-differential cross sections from the threshold energy to 30 MeV. The calculated results agree fairly well with the experimental measurements. The analysis of the total energy angular spectra shows that the elastic channel and the inelastic channels of the 1st and 2nd excited levels largely con tribute to the first three peaks, the third excited level of inelastic channel and channel commonly to the 4th peak of the total spectra at high outgoing energy region.
第一,把入射能量提高到30MeV,以供核工程的需要;第二,在n+~(12)C反应过程中,对靶核和各反应道剩余核能级纲图进行了更新;第三,在更新的能级纲图基础上,得到了一套新的中子及带电粒子的光学模型势参数;最后,重新对各个反应道进行了分析,并在此基础上,利用改进的LUNF程序,得到了出射总中子双微分截面,并很好地符合实验数据。
Each cell corresponds to a region of space that is the size of a giant molecular cloud and moves with the same tangential velocity v. The angular velocity is given by, where r is the distance of the ring from the center of the galaxy.
每个细胞相当于一个区域的空间,这是一个巨大的规模和行动分子云与同切向速度诉角速度给出了,其中r是距离环的中心银河。
A focus lens: fixed point of view, in a visual observation or region depicting scenery, including the parallel perspective, angular perspective, tilt perspective Yang overlook
a焦点透视:固定视点,在一个视域内观察或描绘景物,包括平行透视、成角透视、倾斜透视
Based on the structure preserving model of power system, a semi-saddle point relevant to the fault is found. The intersection point of fault-on trajectory and feasible region boundary becomes a semi-saddle when the angular speeds of generators are set to zero.
基于电力系统结构保持模型,寻找到了和故障相关的一个半鞍点,将持续故障轨迹和可行域边界交点的发电机角速度变为0后,就得到一个半鞍点。
This method can transform the non-stationary signal sampled at the time region into the stabilized signal at the order region with re-sampling of the constant angular interval, therefore the AR Model coefficient of the order region signal is obtained by the blind system identification.
该方法是将时域采样所得的非稳态信号按等角度重采样,从而得到阶域中的稳定信号,对其建立AR模型进行盲辨识求出模型参数。
The allowed region of the angular velocity of vortex depends strongly on the curvature of magnetic field lines.
涡旋角速度允许区强烈地依赖于磁场力线的曲率。
The influence of angular distortion region (2a) and grade of curvature (m) on the stress concentration factor is determined and the regressive expression of the analytical solutions is obtained.
定量解决了角变形区域(2a)和弯曲程度(m)对应力集中系数的影响。
We measured the angular distribution of the photons in the large angle region under symmetrical geometry with respect to the third photon.
在未态两个光子对第三光子的夹角为对称的几何条件下,测量了大角度区域的光子角分布。
The boundary layer is a very narrow region between an accretion disk and an accreting star, in which with the disk material approaching the surface of the star its angular velocity drops from the Keplerian value to the angular rotation velocity of the star.
边界层是介于吸积盘和吸积星之间的非常狭窄的区域,在该区域中随着盘物质接近星面,它的角速度从开普勒角速度下降至恒星自转角速度。
In Locust and Bush cricket, regular changes of the angular sensitivity of the retinula cells of the ommatidia in the side region of the compound eye have been investigated by intercellular recording method under dark and light adapted states during the day and night times.
本文采用细胞内记录方法,研究了蝗虫和螽斯复眼侧区小眼在不同时间(日间和夜间)和不同适应状态(暗适应和明适应)下,小网膜细胞角灵敏度的变化规律。
The characteristic of angular glint of some canonical targets in the resonance region is analyzed based on the concept of angular glint.
从角闪烁的概念出发分析了谐振区典型目标的角闪烁特性。
Conclusions The nasolabial groove region was mainly supplied by the branches of facial artery, infraorbital artery, angular artery and transverse facial artery.
结论:鼻唇沟区血供主要来源于面动脉、眶下动脉、内眦动脉和面横动脉及其分支。
But after including the effects of all these elements, the conventional mechanism is still not able to reproduce the experimental excitation function and angular distribution for the energy region of 0-300 MeV, therefore the effects of some other mechanisms should be included.
但考虑了这些因素的影响后,传统机制仍不能系统地解释0&300MeV能区的激发函数和角分布,必须进一步考虑其它机制的贡献。
In one woman, for example, a zap to a brain region called the angular gyrus resulted in a sensation that she was hanging from the ceiling, looking down at her body.
例如,对于那名女性而言,将意识传送给大脑区域称作角度脑回,最终产生一种感觉,使她感到自己吊在天花板上,看着自己的身体。
In the transition region of accretion disk, the angular velocity deviates from and is smaller than the Keplerian angular veloeity if the wave dissipations are included, and the gravitational potential energy will convert into heat or kinetic energies of accretion gas.
吸积盘内缘区域的波阻将使盘内的角速度偏离开普勒速度而减小,引力势能使流体加热和加速。
A necessary and sufficient condition is given for the existence of an analytic function which is analytic in an angular region, not identically zero, bounded in a horizontal strip and represented by Dirichlet series of complex exponents.
本文对一个在角形区域由复指数Dirichlet级数表示且在一固定水平带形有界解析不恒为零的函数的存在性,给出了充分必要条件。
Additive Angular Dependent Rebalance Acceleration Arithmetic for Neutron Transport Equation in Optically Thick Diffusive Region
强散射介质中子输运计算的角度相关附加再平衡加速算法
By a simple geometrical figure the more stretch of the polarized core was quantitatively estimated when there was α - cluster in the surface region of the core. If there is this polarized effect, it ought to be behaved in the angular distribution of α - decay.
本文通过简单的几何图象,定量估算了在核实表面存在α结团时,核实被极化而进一步拉伸的情况,这样的极化效应,如果存在的话,在α衰变的角分布中应该有所反映。