Synthesis and optical activity of aryl(N-trifluoromethylsulfonylimino)thiodifluoroacetic acids and their derivatives

Synthesis and NMR studies of a new type of optically active sulfur(IV) compounds—aryl(N-trifluoromethylsulfonylimino)thiodifluoroacetic acids and their derivatives are described.     

有侨校特色的交互式实验教学信息化平台构建和实践

Combining the highly internationalized character in Jinan University caring for overseas Chinese, we integrate the technologies and platform of multimedia, QR code and WeChat to build an information education platform including management and safety of laboratories, and experimental courses. The interactive platform provides bilingual contents that meets the requirement of domestic and international students and highly arouse the study interest and stimulate the initiative of students, as a result to improve their comprehensive quality and innovative ability.     

逻辑环随机模型负荷非均衡的服务对策分析

本针对逻辑环随机服务模型中实际存在的站点负荷非均衡现象，（1）阐述该类系统的特点和基本要求；（2）分析已有单一服务策略和设置优先站点服务策略的局限性；（3）与分布系统的负荷分配和均衡问题进行对比；（4）探讨克服原有服务策略的不足，提高系统性能的着眼点；（5）分析新提出的服务策略。     

The Interstitial Pathways as the Substrate of Consciousness: A New Synthesis

This paper considers three classes of analyses of the nature of consciousness: abstract theories of the functional organization of consciousness, and concrete proposals as to the neural substrate of consciousness, while providing a rationale for contesting non-neural and transcendental conceptualizations of consciousness. It indicates that abstract theories of the dynamic core of consciousness have no force unless they are grounded in the physiology of the brain, since the organization of dynamic systems, such as the Sun, could equally well qualify as conscious under such theories. In reviewing the wealth of studies of human consciousness since the mid-20th century, it concludes that many proposals for the particular neural substrate of consciousness are insufficient in various respects, but that the results can be integrated into a novel scheme that consciousness extends through a subcortical network of interlaminar structures from the brainstem to the claustrum. This interstitial structure has both the specificity and the extended connectivity to account for the array of reportable conscious experiences.     

原子核的四面体对称性

除了几个幻数核呈球形外,原子核大都是变形的,例如椭球形。现代核物理实验已发现,原子核可以呈“梨形”形变,即具有反射不对称性。理论研究预言,原子核还可能具有“金字塔”形变,即四面体对称性,而实验上还未找到原子核的这种新对称性。文章从强相互作用量子多体体系的对称性及其破缺的基本规律出发,阐明原子核四面体形变的形成机制,并介绍其理论描述。同时讨论寻找四面体形变原子核的基本方法和最新实验研究进展。     

A model for the size distribution of customer groups and businesses

We present a generalization of the dynamical model of information transmission and herd behavior proposed by Eguíluz and Zimmermann. A characteristic size of group of agents s₀ is introduced. The fragmentation and coagulation rates of groups of agents are assumed to depend on the size of the group. We present results of numerical simulations and mean field analysis. It is found that the size distribution of groups of agents n_s exhibits two distinct scaling behavior depending on ss₀ or s>s₀. For ss₀, n_ss^−(5/2+δ), while for s>s₀,n_ss^{−(5/2−δ)}, where δ is a model parameter representing the sensitivity of the fragmentation and coagulation rates to the size of the group. Our model thus gives a tunable exponent for the size distribution together with two scaling regimes separated by a characteristic size s₀. Suitably interpreted, our model can be used to represent the formation of groups of customers for certain products produced by manufacturers. This, in turn, leads to a distribution in the size of businesses. The characteristic size s₀, in this context, represents the size of a business for which the customer group becomes too large to be kept happy but too small for the business to become a brand name.     

用线性变换方法计算二维正方晶胞正n边形直柱光子晶体的带隙结构

用线性变换方法推导了二维正方结构正n边形直柱光子晶体的带隙计算公式.采用线性变换方法可以简单地处理平面波展开方法中ε-1(r)的Fourier变换系数,使得相应的带隙计算变得简单有效.在固定填充率f=04的情况下,计算了砷化镓(ε=114)材料的正n边形直柱光子晶体带隙结构.发现随着n的增加,光子晶体的对称性相应提高,最大带隙的大小出现单调下降趋势.当n趋向于无穷大的时候,计算的正n边形直柱光子晶体的带隙趋向于零,与圆柱的情况完全相符. 关键词： 平面波展开方法 线性变换 正n边形直柱 带隙 对称性     

Comment on traceability on RSA-based partially signature with low computation

Recently, Chien et al. proposed RSA-based partially blind signature with low computation for mobile and smart-card applications. Hwang et al. claimed that Chien et al.’s scheme cannot meet the untraceability property of the blind signature later. In this paper, we show that Hwang et al.’s claim is incorrect and Chien et al.’s scheme is still satisfy the untraceability property.     

Information security system based on iterative multiple-phase retrieval in gyrator domain

A novel information security system based on multiple-phase retrieval by an iterative gyrator transform algorithm is proposed. In this method, a series of phase masks are designed and located in the input plane and the gyrator planes, and the phase distributions of all the masks are adjusted simultaneously in each iteration. It can achieve fast convergence and high quality of the recovered image and can provide a higher degree of freedom in key space with more parameters as supplementary keys. Furthermore, the security level of this method is greatly improved by the sensitivity of recovered images with the angles of gyrator transform. Numerical simulations are presented to verify its validity and efficiency.     

INFORMA基于TMN 的OXC’s 信息建模

本文介绍了对多波长光传送网实施基于TMN管理中涉及的信息建模的方法问题,在建议了一组用于描述光传送网通用功能的基本传送对象类的基础上,讨论了几种典型OXC′s信息建模的方法,包括可能用到的对象类,这些方法和对象类为建立实际的、完整的OXC′s信息模型提供了的基础.