对粒子物理标准模型的重新审视

 鉴于当前实验研究结果不断地给基本粒子标准模型提出疑难,揭示轻子、夸克存在亚结构的迹象,例如EMC效应预示轻核与重核之间存在差异,pp碰撞单举截面分布在横能E_T>200 GeV时与QCD计算发生较大偏差,发现了反轻子-夸克共振事例,先后发现了夸克的味变中性流和轻子的味变中性流,轻子的"反常量"等等.这些实验迹象都迫使我们有必要及时对基本粒子标准模型进行一番全面、系统的审视.     

Influence of Prosthetic Sagittal Alignment on Trans-Tibial Amputee Gait and Compensating Pattern:A Case Study

This study relates the gait asymmetry, residual limb comfort, and energy cost during walking and identifies a compensating pattern for the trans-tibial amputees when the prostheses are misaligned. One male subject with a trans-tibial amputation volunteered for the study. The knee joint moments at the prosthetic side, the phase symmetry index, and the interface pressures were discussed under three sagittal alignment settings. The results show that the subject changes the knee joint moment, gait symmetry, and interface pressure with a misaligned prosthesis to improve his comfort and movement during walking. A high-quality liner reduces the gait sensitivity to misalignment and enhances the amputee＇s ability to compensate for misalignment. Since different people have different compensation patterns, more cases will be studied in future work.     

夸克模型理论中强子的波函数

本文从强子结构的夸克模型理论出发,根据夸克的性质,ＳＵ（３）群对称理论对强子的分类,以及强子的色,自旋,同位旋等特征,考虑泡利原理等构造出由自旋,同位旋波函数,色波函数和空间波函烽的乘积表示的重子介子的基态波函数。     

计算机辅助平面构成：机械变形与广义对称

该文叙述了如何应用计算机进行平面构成设计,着重说明了机械变形及广义对称。借用高科技进行平面的构成设计,可以得到预想的或者是随机的设计效果,丰富设计思路,提高设计质量,对广义对称,该文列举了部分对称方法及图形。     

Pressure-induced crystallite breaking in La0.7Sr0.3Mn0.9Fe0.1O3 nanosolids

In the compacting process of the La_0.7Sr_0.3Mn_0.9Fe_0.1O₃ nanosolids under the pressure range of 0.0–4.5 GPa, the apparent pressure-induced crystallite breaking phenomenon in these nanosolids was observed. With increasing pressure up to 4.5 GPa, the average grain size decreases by 46 % while the magnetization of nanosolids decrease by 40 % and their coercive increases by 35%. This kind of breaking has a close relation to the existence of oxygen deficiency in La_0.7Sr_0.3Mn_0.9Fe_0.1O₃ nanoparticles. A simple and convenient method for preparing the bulk nanosolids with a large number of clean interfaces has been suggested.     

轻子、夸克的磁矩和跃迁矩

根据轻子、夸克的亚结构理论和在亚夸克模型中的组合波函数,计算了轻子、夸克的磁矩,自旋s=1/2→s=3/2的跃迁矩。     

THE GRAMMATICAL COMPLEXITY AND SYMMETRY BREAKING OF SYMMETRICAL DYNAMICAL SYSTEMS

In this paper we discuss the grammatical complexity of dynamical systems,which satisfy antisymmetric condition and their iteratve interval can be divided into three monotone subintervals. A necessary and sufficient condition Jor the language determined by this system being regular language is proved.. Using the minimal DFA, symmetry breaking is analysed.     

环形腔掺铒光纤激光器频谱仿真和优化

基于掺铒光纤Giles模型,建立了环形腔掺铒光纤激光器模型,按照实际所用的σ结构激光器设定仿真参数,对前向、后向以及双向放大自发辐射(Amplified Spontaneous Emission,ASE)光对激光器性能的影响进行仿真,得到激光器性能优化参数。仿真结果表明在激光器起振时,是否考虑腔内的前后向ASE光对输出光功率幅值与掺铒光纤增益粒子分布影响不大,后向ASE光是导致掺铒光纤存在截止长度的原因。实验结果和仿真结果的对比表明本模型可较准确地仿真激光器的性能,可用于对实际激光器的设计进行参数优化。     

旧混凝土板粒石化再生骨料吸水特性研究

为了揭示旧混凝土板粒石化再生骨料吸水率的特性,根据粒径和砂浆裹附量对粒石化再生粗骨料进行分类,首先从粒石化再生骨料颗粒角度探讨粒石化再生骨料颗粒的吸水规律和影响因素,通过SEM(扫描电子显微镜)电镜扫描试验分析其原因,然后根据粒石化再生分类骨料与粒石化再生粗骨料的数量关系,通过数学演绎推导的方法进一步探讨粒石化再生粗骨料的吸水规律和影响因素。研究结果表明:砂浆裹附量和级配对粒石化再生骨料吸水率产生重要影响,裹附砂浆造成了再生骨料复杂多孔的表面结构,从而使得再生骨料具有独特的吸水特性。同时由于不同破碎工艺对旧水泥混凝土的破碎和砂浆处理程度不同,证明了破碎工艺的重要性。     

井下煤炭自燃发火期预测

准确地预测井下煤炭自燃发火期,并制定出预防和处理措施,才能防止火灾事故的发生。本文分析了煤炭氧化自燃系统所表现出的各种“白色信息”,并以火区附近的一氧化碳浓度作为预测指标,建立了自燃发火期预测模型,与实例是符合的。