Web2.0增值业务安全运营支撑系统的研究

文章参考NGOSS体系结构,针对Web2.0增值业务的特点,设计了Web2.0增值业务安全运营支撑系统的功能框架。同时,论文还提出了基于RBAC的工作流技术,来实现具体的运营过程并对用户进行权限控制以保障系统的安全。     

基于USB2.0与CPLD的光刻机底面对准系统设计

介绍了光刻机底面对准系统的基本原理,并分析了传统底面对准系统存在的缺点,给出了基于USB2.0与CPLD的光刻机底面对准新系统的设计方案。论述了系统硬件和软件的实现,并对其中的关键模块进行了深入分析。与传统底面对准系统相比,该对准系统成本降低约70%,同时,系统的可靠性大幅提高。实验表明,该系统的底面对准精度达到0.25μm,满足系统设计要求。     

基于USB的无线传输系统设计与实现

无线通信技术是一种普遍用于数据传输的技术。为了提高无线数据传输系统的实用性,介绍了基于USB2．0的无线数据传输系统的设计与实现,该系统中使用单片机进行控制,实现了USB2．0与串行接口的通信,数据经无线传输后控制手持式便携设备。该系统已经在实际教学仿真器中进行了应用,可以很好地实现上位机圉形界面与下位机运行的一致,有较好的应用效果。     

基于wIMS技术的互联网与通信业务混搭实现

文章阐述了Web2．0与UMS融合技术（wIMS）的基本概念,分析了通信网络与互联网络业务融合与应用混搭的必要性,提出了基于Web与IMS技术的wIMS解决方案,并对wIMS中间件技术以及基于wIMS的Web2．0和ICT融合应用进行了详细的描述。     

Site-specific ϕ- and ψ-torsion angle determination in a uniformly/extensively 13C- and 15N-labeled peptide

A solid-state rotational-echo double resonance (REDOR) NMR method was introduced to identify the ?- and ψ-torsion angle from a ¹H–¹⁵N or ¹H–¹³C′ spin system of alanine-like residues in a selectively, uniformly, or extensively ¹⁵N-/¹³C-labeled peptide. When a C_α(i) or a ¹⁵N peak is site-specifically obtainable in the NMR spectrum of a uniformly ¹⁵N/¹³C-labeled sample system, the ψ- or ?-torsion angle specified by the conformational structure of peptide geometry involving ¹⁵N(i)–¹H_αi–¹⁵N(i + 1) or ¹³C′(i − 1)–¹H^Ni–¹³C′(i) spin system can be identified based on ¹³C_α- or ¹⁵N-detected ¹H_α–¹⁵N or ¹H_N–¹³C REDOR experiment. This method will conveniently be utilized to identify major secondary motifs, such as α-helix, β-sheet, and β-turn, from a uniformly ¹⁵N-/¹³C-labled peptide sample system. When tested on a ¹³C-/¹⁵N-labeled model system of a three amino acid peptide Gly–[U–¹³C, ¹⁵N]Ala–[U–¹³C, ¹⁵N]Leu, the ψ-angle of alanine obtained experimentally, ψ = −40 ± 30°, agreed reasonably well with the X-ray determined angle, ψ = −39°.     

Hadron interactions in lattice QCD

Progress on the potential method, recently proposed to investigate hadron interactions in lattice QCD, is reviewed. The strategy to extract the potential in lattice QCD is explained in detail. The method is applied to extract NN potentials, hyperon potentials and the meson–baryon potentials. A theoretical investigation is made to understand the origin of the repulsive core using the operator product expansion. Some recent extensions of the method are also discussed.     

A Cahn-Hilliard model in a domain with non-permeable walls

We consider in this article a Cahn-Hilliard model in a bounded domain with non-permeable walls, characterized by dynamic-type boundary conditions. Dynamic boundary conditions for the Cahn-Hilliard system have recently been proposed by physicists in order to account for the interactions with the walls in confined systems and are obtained by writing that the total bulk mass is conserved and that there is a relaxation dynamics on the boundary. However, in the case of non-permeable walls, one should also expect some mass on the boundary. It thus seems more realistic to assume that the total mass, in the bulk and on the boundary, is conserved, which leads to boundary conditions of a different type. For the resulting mathematical model, we prove the existence and uniqueness of weak solutions and study their asymptotic behavior as time goes to infinity.     

Exact and explicit solutions to the discrete nonlinear Schrödinger equation with a saturable nonlinearity

We analyze the discrete nonlinear Schrödinger equation with a saturable nonlinearity through the (G^′/G)-expansion method to present some improved results. Three types of analytic solutions with arbitrary parameters are constructed; hyperbolic, trigonometric, and rational which have not been explicitly computed before.