Facial Feature Exaggeration According to Social Psychology of Face Perception

We propose a personality trait exaggeration system emphasizing the impression of human face in images, based on multi‐level features learning and exaggeration. These features are called Personality Trait Model (PTM). Abstract level of PTM is social psychology trait of face perception such as amiable, mean, cute and so on. Concrete level of PTM is shape feature and texture feature. A training phase is presented to learn multi‐level features of faces from different images. Statistical survey is taken to label sample images with people's first impressions. From images with the same labels, we capture not only shape features but also texture features to enhance exaggeration effect. Texture feature is expressed by matrix to reflect depth of facial organs, wrinkles and so on. In application phase, original images will be exaggerated using PTM iteratively. And exaggeration rate for each iteration is constrained to keep likeness with the original face. Experimental results demonstrate that our system can emphasize chosen social psychology traits effectively.     

Topology optimization based on level set for a flexible multibody system modeled via ANCF

A topology optimization methodology is proposed for the flexible multibody system undergoing both large overall motion and large deformation. The system of concern is modeled via the absolute nodal coordinate formulation. The equivalent static load method is employed to transform the topology optimization of the nonlinear dynamic response of the system into a static one, and evaluated to adapt to the absolute nodal coordinate formulation by splitting the elastic deformations of the flexible components from the overall motions of those components. During the static topology optimization, the material interface is implicitly described as the zero level set of a higher-dimensional scalar function. Then, the semi-implicit level set method with the additive operator splitting algorithm is employed to solve the corresponding Hamilton-Jacobi partial differential equation. In addition, the expert evaluation method of weights based on the grey theory is utilized to define the objective function, and a modified augmented Lagrange multiplier method is proposed to treat the inequality volume constraint so as to avoid the oscillation and drift of the volume. Finally, two numerical examples are provided to validate the proposed methodology.     

Windows7的推广与用户实际应用习惯的磨合

针对不习惯于Windows7操作风格及习惯Windows XP的用户,提出了在电脑硬件条件满足Windows7系统的情况下,要改变因循守旧习惯、倡导新技术新产品的观念,充分利用特有的快捷操作、兼容组件及虚拟机等手段及早接受并适应新技术带给我们的便利及高效。     

New receipt-free voting scheme using double-trapdoor commitment

It is considered to be the most suitable solution for large scale elections to design an electronic voting scheme using blind signatures and anonymous channels. Based on this framework, Okamoto first proposed a receipt-free voting scheme [30] for large scale elections. However, in the following paper, Okamoto [31] proved that the scheme [30] was not receipt-free and presented two improved schemes. One scheme requires the help of the parameter registration committee and the other needs a stronger physical assumption of the voting booth. In this paper, we utilize the double-trapdoor commitment to propose a new receipt-free voting scheme based on blind signatures for large scale elections. Neither the parameter registration committee nor the voting booth is required in our scheme. We also present a more efficient zero-knowledge proof for secret permutation. Therefore, our scheme is much more efficient than Okamoto’s schemes [30] and [31] with the weaker physical assumptions. Moreover, we prove that our scheme can achieve the desired security properties.     

基于移动网核心侧与无线侧参数合理配置的研究

合理设置、调整核心网、无线网参数是提高GSM网络整体性能的必要手段。随着GSM网络优化工作的深入开展,核心网的参数设置对全网用户接入、寻呼、增值业务使用等方面的广泛影响而日渐得到重视;无线网参数对网络中小区的覆盖、信令流程的分布、网络的业务性能等也具有至关重要的影响;同时周期性位置更新、隐含用户关机等参数,必须核心网与无线网的定时器、参数值关联设置才能起到良好的作用。本文结合多年网络优化经验,对核心网、无线网关键参数的合理设置及调整,逐一进行阐述。     

RSA算法的Java实现

网络服务的丰富,尤其是电子商务的发展,需要强健的密码技术确保安全可靠地传递信息。由于密码技术的敏感性,各国对其都有严格的控制。密码算法的工程实现对商业和军事都有着重要的意义。文章研究了加密强度高的RSA算法工程上实现的关键技术,包括随机数的产生及其随机性对算法安全性的影响,大整数的素性检测等。Java是一种应用广泛的跨平台网络编程语言,适合开发大型分布式系统,因而文中给出了RSA算法的一个Java实现,这对商业应用的开发有着重要的意义。     

Comparison of image reconstruction by using near‐field and far‐field data for an imperfect conductor

Image reconstruction by using near‐field and far‐field data for an imperfectly conducting cylinder is investigated. A conducting cylinder of unknown shape and conductivity scatters the incident wave in free space and the scattered near and far fields are measured. By using measured fields, the imaging problem is reformulated into an optimization problem and solved by the genetic algorithm. Numerical results show that the convergence speed and final reconstructed results by using near‐field data are better than those obtained by using far‐field data. This work provides both comparative and quantitative information. © 2001 John Wiley & Sons, Inc. Int J RF and Microwave CAE 11: 69–73, 2001.     

NC图形验证与仿真技术的研究概况

数控程序图形验证与仿真技术的研究对保证加工质量提高加工效率具有重要意义,同时也是虚拟制造技术的主要研究内容之一,该文从国外NC几何验证、NC物理验证以及我国的NC图形验证三个方面对NC图形验证技术的发展概况作了较全面的论述,并指出其中存在的不足和尚待解决的问题。最后提出一种新的复杂曲面NC图形验证的体系结构。     

实现动态网页的一种新技术ColdFusion

介绍了ColdFusion技术的定义、工作原理、具体实例、应用前景。     

基于p范式模型的检索

随着电子文本的大量涌现,人们对信息检索工具提出了更高的要求。本文介绍一种扩展的布尔检索模型及其在中文信息检索系统中的应用,并利用相关反馈技术改善检索系统性能。