A parameter-tuned genetic algorithm for the resource investment problem with discounted cash flows and generalized precedence relations

A resource investment problem with discounted cash flows (RIPDCF) is a project-scheduling problem in which (a) the availability levels of the resources are considered decision variables and (b) the goal is to find a schedule such that the net present value of the project cash flows optimizes. In this paper, the RIPDCF in which the activities are subject to generalized precedence relations is first modeled. Then, a genetic algorithm (GA) is proposed to solve this model. In addition, design of experiments and response surface methodology are employed to both tune the GA parameters and to evaluate the performance of the proposed method in 240 test problems. The results of the performance analysis show that the efficiency of the proposed GA method is relatively well.     

Metamodeling of Smart Environments: from design to implementation

A smart environment is a physical environment enriched with sensing, actuation, communication and computation capabilities aiming at acquiring and exploiting knowledge about the environment so as to adapt itself to its inhabitants’ preferences and requirements. In this domain, there is the need of tools supporting the design and analysis of applications. In this paper, the Smart Environment Metamodel (SEM) framework is proposed. The framework allows to model applications by exploiting concepts specific to the smart environment domain. SEM approaches the modeling from two different points of view, namely the functional and data perspectives. The application of the framework is supported by a set of general guidelines to drive the analysis, the design and the implementation of smart environments. The effectiveness of the framework is shown by applying it to the modeling of a real smart office scenario that has been developed, deployed and analyzed.     

小数乘法器的低功耗设计与实现

提出一种针对小数乘法器的低功耗设计算法,其优化指标为综合后小数乘法器内部寄存中间运算结果的寄存器位宽,解决了目前低功耗设计中算法自身逻辑单元被引入系统从而降低系统优化效果的问题.该算法能够在不降低系统工作效率、不损失系统运算精度、不增加额外逻辑单元的条件下,大幅降低系统功耗和面积.在使用该算法对某一射频模块进行优化后,硬件测试结果显示该射频模块对某型号FPGA的逻辑占用率相比优化前降低17.9％,寄存器总数降低30.7％,存储单元占用率降低21.5％.该算法适用于对含有大量小数乘法运算的系统进行低功耗优化.     

面向对象软件开发及软件工程方法学实践与探讨

该文在应用软件工程方法学和应用软件系统的开发实践的基础上,分析了面向对象软件工程开发中所发生的问题,提出了面向对象程序开发应遵循的手段和方法,同时也将传统的软件开发和面向对象的软件开发形式互补作了描述。作者认为面向对象软件工程方法学是设计开发的思路,而不是一成不变的定律。     

Evolvable Reasoning Hardware: Its Prototyping and Performance Evaluation

In this paper, we propose evolvable reasoning hardware and its design methodology. In the proposed design methodology, case databases of each reasoning task are transformed into truth tables, which are evolved to extract rules behind the past cases through a genetic algorithm. Circuits for the evolvable reasoning hardware are synthesized from the evolved truth-tables. Parallelism in each task can be embedded directly in the circuits through the direct hardware implementation of the case databases. We developed the evolvable reasoning hardware prototype using Xilinx Virtex FPGA chips and applied it to the English-pronunciation-reasoning (EPR) task. The evolvable reasoning hardware for the EPR task was implemented with 270K gates, achieving an extremely high reasoning speed of less than 300 ns/phoneme. It also achieved a reasoning accuracy of 82.1% which is almost the same accuracy as NETTalk in neural networks and MBRTalk in parallel AI.     

嵌入式系统软硬件联合设计方法研究

本文从方法学的角度,结合嵌入式系统的设计,介绍了软硬件联合设计方法的流程和一些关键技术;并针对嵌入式系统自身的特点,探讨了设计方法相应的一些发展;最后,结合一个具体的例子论证了软硬件联合设计方法的特点。     

底层相关的VLSI高层次设计策略

在ＶＬＳＩ系统设计、行为设计和逻辑设计过程中,未考虑到的与半导体制造工艺有关的因素（如延迟、功耗问题等）严重影响设计结果的性能,以至使物理设计结果的性能远离原来的设计目标,针对这个问题,文中提出与底层有关的ＶＬＳＩ高层次设计策略,将影响性能的底层参数和信息引入高层次设计中,使得高层次设计结果在进行物理实现之时能满足性能要求。     

A glance of technology efforts for design-for-manufacturing in nano-scale CMOS processes

This paper overviews design for manufacturing （DFM） for IC design in nano-CMOS technologies. Process/device issues relevant to the manufacturability of ICs in advanced CMOS technologies will be presented first before an exploration on process/device modeling for DFM is done. The discussion also covers a brief introduction of DFM-aware of design flow and EDA efforts to better handle the design-manufacturing interface in very large scale IC design environment.     

计算机专业开展双语教学的改革与探索

该文探讨了高校计算机专业开展双语教学的必要性和在实践中需要解决的问题,从培养目标、课程、师资、教学方法、考核等方面进行了相关的研究和探索。