基于低碳排放的城市空间规划策略研究

面对现代城市污染加剧的问题,做好城市规划对减少城市的碳排放具有决定性的作用。本文以低碳排放作为城市规划的出发点,从现代节能减排技术入手,构建城市空间规划立体网络,为低碳城市建设提供参考。     

Efficient FPGA implementation and verification of difference expansion based reversible watermarking with improved time and resource utilization

This paper presents Xilinx System Generator (XSG) model design for realization of reversible watermarking algorithm using Difference Expansion (DE) approach in System-On-Chip (SoC) Field Programmable Gate Array (FPGA) environment. The reversible watermarking is verified by taking a (4 × 4) sized test image and is applicable for larger sizes of cover images. The outcomes of the result demonstrate that the proposed structural design allows combining MATLAB-Simulink and XSG during graphical user interface for image processing applications. The superiority of the algorithm is justified by using comparative analysis with some well-known methods in both software and hardware environments. The method provides effectively higher PSNR at higher embedding capacity. It is also found that the method requires less time and hardware resources with throughput of 13.516 Mb/s at operational frequency of 80 MHz for real time implementation using FPGA.     

Implementation-aware selection of the custom instruction set for extensible processors

This paper presents an approach for incorporating the effect of various logic synthesis options and logic level implementations into the custom instruction (CI) selection for extensible processors. This effect translates into the availability of a piecewise continuous spectrum of delay versus area choices for each CI, which in turn influences the selection of the CI set that maximizes the speedup per area cost (SPA) metric. The effectiveness of the proposed approach is evaluated by applying it to several benchmarks and comparing the results with those of a conventional technique. We also apply the methodology to the existing serialization algorithms aimed at relaxing register file constraints in multi-cycle custom instruction design. The comparison shows considerable improvements in the speedup per area compared to the custom instruction selection algorithms under the same area-budget constraint.     

基于信息库的第三方政风行风测评模式

针对政风行风测评中测评单位与服务对象众多且分散的特点,为实现民主测评、高效测评,设计以服务对象信息库为基础,对不同的测评单位根据单位行政审批项目及服务对象所涉及的行业,按一定数量和行业比例从服务对象信息库中抽取单位测评子表,在测评单位和纠风办的监督下,由第三方平台现场通过10000号外呼服务对象,并现场记录测评结果,民主、公平、公正的反应被测评单位情况。解决了传统政风行风测评中群众参与积极性不高、测评结果水分多、且费时费力的问题。     

基于小波神经网络的抄纸过程建模仿真研究

抄纸过程中水分定量控制是一种复杂的多变量耦合过程.它具有大滞后、非线性、时变、不确定等特性,因此一般采用常规方法很难准确建立其数学模型.神经网络是一种很好的非线性数学模型,运用多输入多输出的小波神经网络对抄纸过程中水分定量控制进行数学建模,并在小波神经的嘲络训练过程中采用了两种训练方法,加快了训练速度.结果表明,小波神经网络输出值与实际模型输出值的误差在允许范围内,可以很好的逼近抄纸过程的数学模型.     

基于功率谱密度的人体运动状态检测

提出了一种视频图像序列中人体运动状态检测的新方法。针对传统人体状态检测方法利用数据信息的复杂性,对图像中人体外接矩形区域提取位置和尺度稳定的非结构化数据信息——关键点,计算关键点的功率谱密度,在序列视频图像中可获得关键点功率谱密度的分布,利用其分布特点判断人体运动状态。实验证明方法的有效、可行和简易。     

基于PCC的双馈风力发电系统励磁控制器的研究

在分析现有变速恒频双馈风力发电励磁控制系统的基础上,提出了一种基于PCC的双馈励磁控制器的实现方案;以PCC可编程控制器作为励磁控制器的核心控制器,简化了系统硬件结构,提岛了系统稳定性和系统的反应速度;通过搭建仿真实验系统,原动机采用15kW交流异步电机来模拟风机,双馈发电机采用绕线式感应电机,以整流模块和逆变模块组合为双向变流器,加入PCC励磁控制器,进行起励、故障切除等的仿真实验,检测了在发电机转速发生变化和跨越同步转速的情况下励磁控制器的工作情况和效果,实验结果证明,该方案完全满足实际要求.     

能耗自选演进机制的延迟容忍网络路由算法

为了提高延迟容忍网络中数据投递过程节点能耗管理效率、改善数据在网络中的转发效率等,本文引入节点间能耗博弈模型,进而提出了一种基于能耗自选演进机制的延迟容忍网络路由算法（Efficient Routing Mechanism for Delay Tolerant Network based on Energy Consumption Strategy）,根据泛洪路由策略设计数据投递机制,数据在网络中转发时,节点依据自身能量剩余状态制定相应的投递操作,对首先将数据投递至目的节点的中间节点予以一个单位的奖励,利用节点策略博弈模型选取合理的数据投递操作,以此改善节点转发数据能量消耗,从而提高数据投递能量管理效率,并提高数据转发效率.仿真验证表明：所提算法与对照算法相比在数据投递率、传输时延、网络开销等性能指标上表现出较好效果.     

College students’ disclosure of location-related information on Facebook

This study drew on existing research and three behavioral intention models to develop the beginning of a new model to explain why college students share their locations on Facebook. Findings showed that students were more likely to disclose their location on Facebook if their friends did so, a concept called subjective norm. Results also showed that subjective norm had an indirect effect on whether people disclosed their location, mediated through people’s attitude toward disclosure, while controlling for usefulness of disclosing. Collectively, this model explained 61% of the variance in why college students share locations on Facebook. Findings are discussed in relation to behavioral-intention models, and practical implications for social media companies are offered.