关于解线性系统的一个有效的贝叶斯迭代方法

This paper concerns with the statistical methods for solving general linear systems. After a brief review of Bayesian perspective for inverse problems,a new and efficient iterative method for general linear systems from a Bayesian perspective is proposed.The convergence of this iterative method is proved,and the corresponding error analysis is studied.Finally, numerical experiments are given to support the efficiency of this iterative method,and some conclusions are obtained.     

Theoretical investigations of the vapour-liquid equilibrium and dielectric properties of dipolar Yukawa fluids in an external field

In a low field approximation, using the dipolar Yukawa fluid model (in mean spherical approximation as a reference system) a consistent field-dependent free energy expression is proposed for the calculation of the vapour-liquid equilibrium of polar fluids in an applied electric field. A perturbation theory high field approximation expression of the free energy is also proposed to study the field-dependent properties of fluids. In the high field approximation, equations for the field-dependent polarization and for the nonlinear dielectric constant (or Piekara constant) are also predicted. It has been discussed that our approximations are appropriate to describe the vapour-liquid-like phase equilibria and the magnetization curves of magnetic fluids.     

Forces between charged surfaces in a solvent primitive model electrolyte

Grand canonical Monte Carlo (GCMC) simulations have been performed to investigate the components of the force between parallel charged surfaces in an electrolyte. The solvent primitive model (SPM) was used to investigate the effect of neutral hard sphere solvent particles on the force between the surfaces. The effects of particle size, wall charge density, charge valency of the electrolyte, and the exclusion of neutral hard sphere are discussed. When solvent particles are considered, the total force between the charged surfaces is always repulsive, even for divalent counterions. This is different from the earlier conclusion reached with a restricted primitive model electrolyte. The repulsive force decreases in going from monovalent counterions to divalent counterions.     

区组长度为4和5的几乎广义平衡赛程设计

一个几乎广义平衡赛程设计NGBTD（k,m）是一个定义在km＋1元集V上的（km＋1,k,k-1）-BIBD,它的区组可按如下方法安排在一个m×（km＋1）表阵中：（1）每列中所有区组构成V＼{x}（x∈V）的一个部分平行类;（2）V中每个元素恰出现在每行的南个位置．完全解决了NGBTD（4,m）的存在性问题以及除4个可能例外值外的NGBTD（5,m）的存在性问题．     

High Efficiency Pulse Acetone Liquid Raman Laser Using DCM Fluorescent Dye as the Enhancement Medium

Pumped by a frequency-doubled Nd：YAG laser, 10-Hz repetition rate, 320-mJ pump energy, and 5.1-ns pulse width, a liquid Raman laser using acetone as the Raman shifting medium has been established. The residual pump laser pulse and the generated Stokes pulse are directed to a DCM dye cell for energy enhancement of the Stokes pulse. The Raman laser system is capable to produce a laser pulse at wavelength 630nm, with single pulse energy of 120md, peak power of 70MW and an average power of 1200mW. The energy conversion efficiency is 37.5%, or equivalently a quantum efficiency of 44.5%.     

New Chiral Ligands: From Fundamental Research to Potential Industrial Applications

Asymmetric catalysis is one of the most extensively studied areas in chemistry over the past three decades. In this presentation we will discuss the new advancements in the design, synthesis, and application of chiral ligands used for catalytic reactions in our laboratory. Particular emphasis will be placed on new, highly efficient synthetic methodologies and their potential industrial applications.New Chiral Ligands: From Fundamental Research to Potential Industrial Applications@Albert S.…     

液态金属在环管换热研究

速度场与温度场均充分发展时的稳定段传热,对钠冷快堆运行和安全是至关重要的,该研究领域不仅包括低温高Pe数传热,而且也包括高温低Pe数传热,迄今为止,后者很少有人问津,在理论研究的基础上,重点对高温(300～700℃)、低Pe数(20～70)和低温(250～270℃)、高Pe数(125～860)液态金属钠在环管换热开展了实验研究,并根据实验结果拟合出两个适用于不同工况的计算关系式,且与实验数据吻合良好.     

薄膜型负质量密度声学超常介质

文章作者提出了一种结构简单、易于实现的薄膜型声学超常介质,不仅从实验上证实了它能够在100Hz到1000Hz的低频范围内以200倍的幅度打破声波衰减的质量密度定理,而且还给出了相应的理论解释.由于薄膜弱小的弹性模量,对于一块周边被硬边框所固定的小面积的弹性薄膜而言,仍然存在着各种不同的低频振荡模式.这些振荡模式的本征频率可以通过在薄膜的中央放置一个小的质量块而调整.文章作者惊奇地发现,在位于两个最低的本征频率之间的某个特定频率处,入射的声波几乎完全被反射,此时整个薄膜面内的平均法向位移为零.借助于有限元数值模拟方法,也发现在全反射频率附近薄膜的动态质量密度是负的.实验结果和理论计算符合得非常好.与此同时还发现,微波在某些频率全透射通过金属分型结构的现象可以用类似的机制来解释,而且这些全透射频率也是位于两个局域共振频率之间.     

EFFECT OF PHOTODYNAMIC THERAPY ON ANTITUMOR IMMUNE DEFENSES: COMPARISON OF THE PHOTOSENSITIZERS HEMATOPORPHYRIN DERIVATIVE AND CHLORO-ALUMINUM SULFONATED PHTHALOCYANINE

The effects of the two photosensitizers chloroaluminum sulfonated phthalocyanine (ClAlSPc) and hematoporphyrin derivative (HpD) on the functional activities of macrophages and natural killer (NK) cells, two immunocyte populations implicated in the control of tumor development and spread, have been investigated. Murine peritoneal macrophages treated in vivo with ClAlSPc or HpD at 10 mg/kg body weight showed no impairment of Fc-mediated phagocytic capacity and only minor disturbances of in vitro tumoricidal/tumoristatic function. The NK cell activity of splenocytes obtained from photosensitizer-treated mice, assayed 24 or 48 h after i.v. injection of ClAlSPc or HpD at 10 mg/kg was unaffected compared to controls. However significant inhibition of NK activity was observed when splenocytes obtained from mice with or without subcutaneous Colo 26 tumors, treated with ClAlSPc plus laser therapy (675 nm) were used as effector cells. The results show that impairment of some anti-tumor activity can be observed in phthalocyanine treated or phthalocyanine + laser-treated animals but this relatively minor impairment may augur well for the use of systemic phthalocyanine administration in photodynamic therapy.     

分层不动点及变分不等式的粘性方法及应用

介绍了处理变分不等式问题的一种分层不动点的粘性方法．这一方法所涉及的映像是非扩张的,而其解是从另一非扩张映像的不动点集中求出．在文末,还把这一结果应用于研究单调变分不等式问题、凸规划问题、分层极小化问题及在不动点集上的二次极小化问题．