义马煤气污水处理厂的自控设计

本文介绍了义马煤气污水处理厂的SBR预处理工艺，部分典型自摔方案及PLC监控方法。     

跟踪误差的风险分析

为了明确指数基金所面临风险的大小以及风险的来源 ,采用回归模型、相关系数和多因素模型对跟踪误差的方差进行分析 ,给出并且证明跟踪误差方差分解的一般表达式 ,并且确定了进一步研究的方向。     

危机时期政府对经济的财政金融调节机制的建立

为应对“非典”危机 ,政府已经投入了一百个亿 ;为了应付“非典”危机对经济的影响 ,政府还需要投入更多的资金。“非典”类危机是不确定的 ,时时有可能爆发 ,为此 ,政府要建立起危机管理机制 ,其中包括财政金融调节机制。     

数字中频接收机的设计与实现

数字中频接收机(DIFR)是对中频信号直接采样，其信道化功能由数字正交下变频器和数字滤波器来实现。因此，DIFR适用于接收和处理多载波、多模式信号，可解决很多种信号之间的互通互连问题。本文基于DIFR对动态范围、带宽、自动增益控制和高速信号采集等技术需求，优化设计了一种大动态宽带DIFR，给出了该系统的实现方案、各部分的参数分配及系统设计指标；给出了一种新型的数字自动增益控制(DAGC)实现电路，并提出了其控制算法。     

一种多功能海事卫星电话的造型与结构设计

针对多功能海事卫星电话的结构特点,提出了详细的设计流程。按照所提出的设计流 程,分别对该产品的结构总体设计、造型设计和详细的结构设计进行了论述。设计的多功能 海事卫星电话在结构上具有以下特点:电话主机可水平360°范围内自由旋转,可前后90°范 围内自由俯仰调节;话筒组件也能够根据用户使用要求和使用习惯进行前后俯仰角的自由调 节。     

山东省征地信息公开项目自动导入模块建设与应用

针对山东省征地信息公开工作中省厅环节公开任务繁重、人工参与度高等问题,研究征地项目数据自动导入的相关技术方法,介绍自动导入模块的实现过程,对各个环节遇到的问题、解决思路、数据交换格式等进行详细说明。     

Pattern mining in tourist attraction visits through association rule learning on Bluetooth tracking data: A case study of Ghent,Belgium

The rapid evolution of information and positioning technologies, and their increasing adoption in tourism management practices allows for new and challenging research avenues. This paper presents an empirical case study on the mining of association rules in tourist attraction visits, registered for 15 days by the Bluetooth tracking methodology. This way, this paper aims to be a methodological contribution to the field of spatiotemporal tourism behavior research by demonstrating the potential of ad-hoc sensing networks in the non-participatory measurement of small-scale movements. An extensive filtering procedure is followed by an exploratory analysis, analyzing the discovered associations for different visitor segments and additionally visualizing them in ‘visit pattern maps’. Despite the limited duration of the tracking period, we were able to discover interesting associations and further identified a tendency of visitors to rarely combine visits in the center with visits outside of the city center. We conclude by discussing both the potential of the employed methodology as well as its further issues.     

谈火灾自动报警及联动控制系统的设计

以某公司极薄涂镀板深加工工程为例,根据不同保护对象选用不同的火灾探测器,从而进行火灾自动报警及联动控制系统的设计,使整个系统具有组成灵活性、性能优越性、工作可靠性。     

A Stochastic Receding Horizon Control Approach to Constrained Index Tracking

This paper develops stochastic receding horizon control for a constrained index tracking problem. By modeling the asset dynamics in the problems as a linear system subject to state and control multiplicative noise, and approximating linear chance constraints with quadratic expectation constraints, we show that index tracking can be approached using stochastic receding horizon control. In particular, we use a closed loop version of stochastic receding horizon control where the on-line optimization is solved as a semi-definite program. Numerical examples demonstrate the computations involved in these problems and indicate that stochastic receding horizon control is a promising new approach to constrained index tracking. C. H. Sung completed this work while he was a graduate student in the Management Science and Engineering Department, Stanford University.     

一种直角坐标系下机动目标匀加速圆周运动新模型

针对机动目标跟踪过程中运动模型分散繁杂的缺点,提出一种能 描述多种运动形式的匀加速圆周运动模型。首先,给出了匀速圆周运动目标的状态向量描述 。在此基础上,针对匀加速圆周运动的特点,建立了直角坐标下目标速度模型。通过巧妙利 用微积分方法,推导出匀加速圆周运动的位置和加速度模型。最后,通过数学证明和仿真实 验,验证了该运动模型的有效性。