校史教育在大学生核心价值观养成中的价值和途径

针对传统矿山定位监测系统中有线方式成本高、资源浪费、可操作性差等问题,将无线传感器网络技术应用于矿山微震定位。通讯系统采用由末端网络节点和中心节点构成的星形无线传感器网络结构。应用时钟同步技术,末端节点将矿震信号通过射频模块上传给中心节点,进而通过上位机完成对数据的进一步处理。该系统为无线通信在矿山越界开采监测中的应用研究。     

Emulation and interpretation of high-dimensional climate model outputs

Running complex computer models can be expensive in computer time, while learning about the relationships between input and output variables can be difficult. An emulator is a fast approximation to a computationally expensive model that can be used as a surrogate for the model, to quantify uncertainty or to improve process understanding. Here, we examine emulators based on singular value decompositions (SVDs) and use them to emulate global climate and vegetation fields, examining how these fields are affected by changes in the Earth's orbit. The vegetation field may be emulated directly from the orbital variables, but an appealing alternative is to relate it to emulations of the climate fields, which involves high-dimensional input and output. The SVDs radically reduce the dimensionality of the input and output spaces and are shown to clarify the relationships between them. The method could potentially be useful for any complex process with correlated, high-dimensional inputs and/or outputs.     

数字信号处理双语教学教材选用与建设

研究了双语教学的教材选用和建设等问题,结合在北京邮电大学的双语教学实践就双语教学教材建设和使用提出了一些建议。     

DSP的通信协议栈的研究与实现

提出了一种基于TMS320C6415的嵌入式通信协议栈的实现方法。协议栈以TCP/IP/PPP为主,底层设计物理层协议,通过McBSP与信道调制解调的DSP进行数据帧收发,实现多DSP互连传输数据和物理信道状态通告;上层增加会话层,数据通过PCI总线接口与主机应用层协议进行通信,在DSP内部采用μC/OS-II完成多任务的调度管理。在Windows 2000上用Driver Studio设计实现cPCI的WDM驱动。实验结果表明,该协议栈具有结构紧凑、层次分明、传输速率高、回路延迟小的特点,符合设计要求。以之为基础开发的协议栈软件实现了远程测量通信。     

利用迭代滤波改进乘积高阶模糊函数

乘积高阶模糊函数(PHAF)是因分析mc-PPS而提出来的,但它抑制交叉项的能力有限,难以实现mc-PPS估计。该文提出了逐次滤除最强PHAF峰对应的分量来减少交叉项的迭代滤波方法,改进后的PHAF具有较好的鲁棒性:减少了估计盲区,并且具有更好的估计精度,降低了信噪比门限,而且能估计低阶相位系数,这些性能由多个mc-PPS仿真例子所验证。     

Single-step and multiple-step forecasting in one-dimensional single chirp signal using MCMC-based Bayesian analysis

Chirp signals are frequently used in different areas of science and engineering. MCMC-based Bayesian inference is done here for the purpose of one-step and multiple-step prediction in the case of the one-dimensional single chirp signal with iid error structure as well as dependent error structure with exponentially decaying covariances. We use Gibbs sampling technique and random walk MCMC to update the parameters. We perform total five simulation studies for the illustration purpose. We also do some real-data analysis to show how the method is working in practice.     

Three-level control charts with variable sample size,sampling interval,and control limits

Recently, three-level control chart has been developed for monitoring situations in which an appropriate quality measure uses three discrete levels to classify a product characteristic. In this paper, the variable parameters control charts for multinomial data are developed with a three-level classification scheme. We compare it with various adaptive charts to show that this modified scheme can improve the performance. In order to evaluate and compare the performance of this scheme, adjusted average time to signal is used as the performance measure. Results indicate that the proposed chart has improved performance and is relatively sensitive to small shifts.     

新形势下大学物理实验面临的问题与对策

文章简述了在扩招和大实验平台的新形势下大学物理实验所面临的资源、师资和管理等问题;探讨了多媒体预习、仿真和虚拟远程实验辅助及实验主持人负责等相应的对策.     

数字信号处理课程教学改革的探索和实践

数字信号处理课程具有理论性强、比较抽象的特点。针对目前东华理工大学学生学习的现状,学校对数字信号处理课程建设进行了相应的改革。这主要表现在整合教学内容、优化课程体系、丰富教学手段、运用多样化的实践教学、改革考核方法及加强师资队伍建设等方面。课程建设更加注重培养学生的动手能力和解决问题的能力。实践表明教学改革取得良好的效果。     

我国P2P网络借贷的信号博弈分析

针对我国P2P网络借贷中信用风险频发的现象,通过建立信号博弈模型,分析三种贝叶斯均衡下参与者的行为,找出信用风险的影响因素。研究表明：高低利率下借款者可获本金、风险担保金、修改信息使信用评级失真的成本、平台借款者总体信用等因素可以影响网络借贷信用风险,采用分离均衡策略能够降低这种风险。