Hyper expression of kojibiose phosphorylase gene and trehalose phosphorylase gene from Thermoanaerobacter brockii ATCC35047 in Bacillus subtilis and selaginose synthesis utilizing two phosphorylases

The kojibiose phosphorylase (KP) gene and trehalose phosphorylase (TP) gene from Thermoanaerobacter brockii ATCC35047 were intracellularly hyper-expressed under the control of the Bacillus amyloliquefaciens alpha-amylase promoter in Bacillus subtilis. The production yields were estimated to be 2.1 g of KP and 4.9 g of TP per liter of medium. Selaginose, non-reducing trisaccharide, was synthesized from trehalose utilizing the recombinant KP and TP from B. subtilis. Selaginose was not hydrolyzed by salivary amylase, artificial gastric juice, pancreatic amylase, or small intestinal enzymes.     

A cellular non‐linear network for image fusion based on data regularization

In this paper, a synthesis method developed in the last few years is applied to derive a cellular non‐linear network (CNN) able to find an approximate solution to a variational image‐fusion problem. The functional to be minimized is based on regularization theory and takes into account two complementary principles, namely, knowledge source corroboration and belief enhancement/withdrawal, both typical of data‐fusion approaches. The obtained CNN has been tested by simulations (i.e. by numerically integrating the circuit state equations) in some case studies. The quality of the results is good, as turns out from comparisons with some standard methods. Copyright © 2006 John Wiley & Sons, Ltd.     

网格资源的超拓扑空间模型

为了更好地共享和使用网格资源,资源模型已经成为网格计算的重要研究问题之一。论文从超拓扑空间的角度重新审视了网格资源模型的内在机理与结构,对资源的描述、抽象以及单一系统映像方法进行了深入的研究,提出了一个形式化资源模型,具有三层结构,分别是:特征信息层、特征处理层和功能层。各层有着不同的组织形式与拓扑结构,并且进一步可细分为若干亚层;利用所提出的聚类方法,上层结构可由下层自动形成。应用分析表明,该模型能够有效地提高网格资源管理系统的可用性、模块性、透明性和自动化。     

一个基于超椭圆曲线的单向数字签名

超椭圆曲线密码体制(HECC)是椭圆曲线密码体制(ECC)的自然推广,但不仅仅是一种简单的推广。HECC与ECC相比有速度快、基域小的优点。而单向签名是一种只有特定的用户才能验证的数字签名方案。该文基于超椭圆曲线密码体制提出了一个单向签名方案,并分析了其安全性。与现有方案相比,本方案有一定的优势。     

1341.4 nm Nd:YAP激光内镜下治疗消化道疾病45例报告

可经光导纤维传输的1341.4nm激光有着良好的组织凝固、气化功能,且肌体组织穿透力较1064nm激光小得多,因而安全性能显著提高.45例内镜下消化道增生性疾病的治疗结果表明:1341.4nm激光是内镜下空腔脏器激光手术的一种比较理想的新型激光源.     

一般的9-7小波滤波器及其图像压缩性能研究

通过构造一个包含Cohen和Daubechies等人的著名9-7小波滤波器(CDF97)的超小波滤波器族,获得了新的9-7小波滤波器,它们不仅有很好的压缩性能,也有很好的计算性能,有利于ASIC的设计.试验结果表明,新的小波滤波器几乎具有CDF97的客观压缩性能,并且能保留更多的图像细节.因此,在标准化图像压缩系统中,本文的滤波器是CDF97理想的替代者.     

Design and implementation of a wireless internet remote access platform

Recently, mobile networks and internet technologies have been widely developed for the voice communication and information retrieval services all over the world. Compared with the wire‐line internet environment, mobile networks have lower bandwidth, longer transmission latency and unreliable connection, and the capability of mobile terminals is restricted by the limited memory size, lower CPU computation capability and inconvenient I/O interface. These limitations restrict the development of the wireless internet applications. In this paper, we design and implement a ‘wireless internet remote access platform’ (WIRAP). The WIRAP platform interconnects the wireless network and internet to provide mobile users a remote centralized storage and computation environment. A mobile user can store large volume of data and execute complex computations on WIRAP instead of on the mobile terminals. WIRAP supports different network interfaces (e.g. short message service (SMS), wireless markup language (WML) and hyper text markup language (HTML) and users may use terminals (with different network capabilities) to access WIRAP. Copyright © 2006 John Wiley & Sons, Ltd.     

多维超Bent函数的构造

有限域Fp2m上的超Bent函数是与Fp上所有m序列的距离都达到最大的函数,该文研究了F22m 上超Bent函数与GF2m(2)上Bent函数之间的关系,对一类超Bent函数的性质作了深入细致的刻画,给出了有限域Fp2m上多维超Bent函数的两种构造方法．     

超高速动能导弹控制器的设计与仿真

研究超高速动能导弹 (HVKEM )控制器的设计和数字仿真 .建立弹道对瞄准线 (LOS)偏差的数学模型 ;闭环制导回路用相位超前 滞后校正网络补偿 ;设计出用于控制弹道姿态的姿态控制发动机 (ACMs)的选择算法 .在存在多种干扰条件下 ,控制器数字仿真结果满足圆形误差概率(CEP)小于 0 5m .用ACMs作为执行机构控制HVKEM姿态的控制方案是可行的     

在Windows95下的主页制作

以 Word及 Frontpage等主页制作软件为例 ,简介山西阳光发电有限责任公司内部网页制作情况 ,并提出将来发展方向