Urban data and urban design: A data mining approach to architecture education

The configuration of urban projects using Information and Communication Technologies is an essential aspect in the education of future architects. Students must know the technologies that will facilitate their academic and professional development, as well as anticipating the needs of the citizens and the requirements of their designs. In this paper, a data mining approach was used to outline the strategic requirements for an urban design project in an architecture course using a Project-Based Learning strategy. Informal data related to an award-winning public space (Gillett Square in London, UK) was retrieved from two social networks (Flickr and Twitter), and from its official website. The analysis focused on semantic, temporal and spatial patterns, aspects generally overlooked in traditional approaches. Text-mining techniques were used to relate semantic and temporal data, focusing on seasonal and weekly (work-leisure) cycles, and the geographic patterns were extracted both from geotagged pictures and by geocoding user locations. The results showed that it is possible to obtain and extract valuable data and information in order to determine the different uses and architectural requirements of an urban space, but such data and information can be challenging to retrieve, structure, analyze and visualize. The main goal of the paper is to outline a strategy and present a visualization of the results, in a way designed to be attractive and informative for both students and professionals – even without a technical background – so the conducted analysis may be reproducible in other urban data contexts.     

一种基于单片机的多用途数据采集系统设计

介绍了一种低成本、高稳定性、多用途的数据采集系统的设计方法。该系统以51系列单片机为控制核心，具备转发指令、数据备份及传输、操作提示等功能，适应性较广，特别适合于对计算机外围设备进行数据采集和备份。     

一种PaaS系统的数据监控平台的设计方案

伴随着互联网的飞速发展,尤其是移动互联网的出现,为了应对Web应用的快速部署、自动维护、自动扩容等需求,PaaS平台应运而生,并快速发展。与此同时,PaaS系统的数据监控问题也随之出现。本文就是为了解决PaaS系统中数据监控的问题,通过对PaaS系统结构的抽象,明确数据监控的内容,确定监控数据的采集来源,然后分3个层次设计实现了PaaS系统中数据监控平台。该数据监控平台的实现可以有效的解决PaaS系统中大量异构化的数据的采集、分析和展示的问题。     

电子测量设备USB数据采集系统设计

USB接口是目前数据通信中使用较多的接口类型,由于该接口支持设备热插拔而且传输速度特别快,所以很受欢迎.本文叙述了利用单片机AT89S52和USB接口芯片PDIUSBD12设计一个电子测量设备USB接口电路,可用作PC机和微处理机间传输数据的通路,以使PC机对各种设备进行控制.     

工业现场数据采集常用方案的设计

工业现场各种在线监测设备通过不同类型的传感器,对现场监测的指标进行实时的收集,这些收集起来的数据可能会通过各种不同的接口,将测量数据传输至数据采集设备上去。数据采集设备采集数据的准确性与稳定性,对于后期的监控至关重要。因此,如何设计采集精度高的系统,成为我们系统设计的首要问题。     

楼宇设备测控系统的无线数据采集与传输模块设计

针对楼宇设备测控系统,提出一种无线数据采集与传输模块设计方案,该设计方案采用nRF24LE1无线数据采集模块和nRF24LU1+无线 USB 模块构成,采用GFSK调制技术,工作频率为2.4 GHz,数据传输速率为2 Mbps,具有125个无线频道,14路输入的6/8/10/12位分辨率A/D转换器,AES硬件加密解密,最大发射功率-18 dBm,接收灵敏度-94 dBm,采用3.3 V供电,电流11.1～13.3 mA.系统安装和组网灵活,可以嵌入各种楼宇智能化监控设备应用.     

实时采集数据绘图及多种数据保存方式程序设计

直流稳压电源输出幅度稳定度的测量问题,必须实时采集数据绘制波形图,并以不同保存方式保存真实的反映测试过程的测量数据,本文介绍了在LabVIEW 8.5开发环境下,通过GPIB接口控制Agilent34401A实现实时幅度测量数据采集,并将采集数据实时描绘成波形图及多种数据保存方式的程序设计方法.该程序与波形记录仪功能相仿,可以反映被测物理量的变化趋势,它不仅扩展了仪器功能,还具有采集时间间隔任意设置、波形打印、数据存盘等功能.     

多功能并行数据采集手持终端系统设计

现代工农业发展中,特殊作业领域的数据采集工作受到了广泛的关注.本文设计了一种多功能并行数据采集手持终端,终端利用并行数据采集方式将采集到的环境信息进行融合并存储,用户可以通过LCD显示屏实时读取现场信息,并通过GSM模块将数据发送至控制中心.经试验证明,本终端运行可靠,抗干扰能力强,采集的数据能及时更新.     

Representing monitored systems: A critical process in data collection

Data collection is a profound step towards effective performance analysis, and it is being challenged by the fact that computing systems become more complex so that mechanical and exhaustive data collection is nearly impractical. To cope with this situation, our recent research has been aimed to improving a critical process in data collection, namely, representing monitored targets. This paper presents a declarative approach to this process, which largely departs from conventional procedure-oriented methods.     

A simple computerized neuroanatomical data collection system

A semiautomated data collection system, flexible enough to apply to any microscopic tissue where the data can be accepted as point positions, is described. The design is simple and can be easily implemented on a mini-or microcomputer with minimal additional hardware. The results of a typical neuroanatomical experiment are shown together with an error and time constraint analysis.     

RSR32串行端口通信数据采集工具的设计与实现

文中基于各种通信端口数据转发采集为目的,以RSR32串口为研究对象,对两个任意独立模块通信数据采集进行分析。通过C＋＋语言定义一个通信端口基类,然后在基类基础上派生出各种比如RS232,socket之类的实现,从而得到实现端口之间数据的透传一套工具。该工具设计简单,功能强大,方便实用,可推广至socket、并口、USB等。     

A multirate digital multicarrier demodulator: design,implementation, and performance evaluation

Frequency-division multiple access (FDMA) and single channel per carrier (SCPC) in the uplink and time-division multiplexing (TDM) in the downlink are employed in the system described. To interface FDMA in the uplink and TDM in the downlink, multicarrier demodulation (MCD) is required onboard the satellite. The operation of the onboard MCD is the separation of each individual channel and subsequent demodulation. The results, which concern onboard frequency demultiplexing and demodulation for low-bit-rate carriers, are constrained by the requirement that new-generation payloads could serve the stations already active in the INTELSAT Business System. A digital hardware design that implements an MCD that can process three channels at 4.4 Mb/s or 12 channels at 1.1. Mb/s is described. The test results confirm the MCD feasibility, and further improvements are expected from a semicustom implementation     

Dynamic clustering approach with ACO-based mobile sink for data collection in WSNs

Enhancing the network lifetime of wireless sensor networks is an essential task. It involves sensor deployment, cluster formation, routing, and effective utilization of battery units. Clustering and routing are important techniques for adequate enhancement of the network lifetime. Since the existing clustering and routing approaches have high message overhead due to forwarding collected data to sinks or the base station, it creates premature death of sensors and hot-spot issues. The objective of this study is to design a dynamic clustering and optimal routing mechanism for data collection in order to enhance the network lifetime. A new dynamic clustering approach is proposed to prevent premature sensor death and avoid the hot spot problem. In addition, an Ant Colony Optimization (ACO) technique is adopted for effective path selection of mobile sinks. The proposed algorithm is compared with existing routing methodologies, such as LEACH, GA, and PSO. The simulation results show that the proposed cluster head selection algorithm with ACO-based MDC enhances the sensor network lifetime significantly.

     

基于USB接口的数据采集设备

为了实现USB接口的数据采集,有效地提高数据采集设备与主机的通讯速度,介绍了一种基于内置USB接口的新型单片机设计的高速数据采集板。包括该系统的硬件构成和软件组成。系统符合USB1．1协议,是一种比较新颖,系统配置灵活的数据采集设备。     

A proposed approach to mechatronics design education: Integrating design methodology,simulation with projects

Mechatronics engineering graduates are expected to design mechatronics products with higher performance and lower costs. The success of a mechatronics engineering program is directly related to the structural design methodology, modeling and simulation, and the practical implementation of fully integrated physical systems. In this paper a mechatronics design education-oriented V-model was proposed to fulfill these requirements. The main idea behind our proposed approach aims to integrate various stages such as design, simulation and physical implementations in development of mechatronics product or system. Students are asked to first follow the structural design methodology to do the conceptual and further detail design for an open-ended problem, then to do appropriate simulation to verify the feasibility of the design, and at last to integrate all components and subsystems into a complete physical product or system. The V-model-related courses and structures were explained in detail, and project implementation experiences were described and discussed with the help of example student projects.     

Carrier-based PWM-VSI overmodulation strategies: analysis,comparison, and design

In this paper, the overmodulation region voltage-gain characteristics and waveform quality of carrier-based pulsewidth-modulated (PWM) methods are investigated. Through detailed analytical study, voltage-gain characteristics are extracted independent of carrier frequency. The influence of blanking time and minimum pulsewidth (MPW) control on the inverter gain characteristics are studied and shown to be significant. A comparative evaluation of the modulator characteristics reveals the advantageous high-modulation-range characteristics of discontinuous PWM methods and, in particular, the superior overmodulation performance of a discontinuous PWM method. The modulation methods under consideration are tested on a PWM voltage-source inverter (VSI)-fed induction motor drive in the laboratory, and the theoretical results are verified by experiments. Also, a gain linearization technique is presented and experimentally verified. The results of this study are useful in the design, performance prediction and development of high-performance overmodulation strategies for PWM-VSI drives     

A unified delay analysis framework for opportunistic data collection

Wireless Networks - The opportunistic data collection paradigm leverages human mobility to improve sensing coverage and data transmission for collecting data from a number of Points of Interest...     

A 32-electrode data collection system for electrical impedancetomography

A 32-electrode data collection system for electrical impedance tomography (ETT) is presented. In this system, the demodulator is a multiplexed sample and hold (S&H) circuit followed by a voltage difference stage. This configuration provides high CMRR due to the low (almost DC) operating frequency of the signals the difference stage is required to process     

A high-capacity mobile radiotelephone system model using a coordinated small-zone approach

Parameters of a large-scale highly coordinated mobile telephone system are discussed, particularly those of system size and frequency spectrum required. The concept of small-zone coverage areas to serve large customer densities is discussed, and the essential properties of small-zone systems are generalized to show that zone size alone is not an adequate parameter to distinguish large- from small-zone systems. A high-capacity small-zone system model using several zone sizes is presented. Advantages of small-zone operation other than spectrum economy are enumerated, as are the attendant disadvantages.     

Intelnet Services—A global data distribution and collection scheme

Responding to the recent availability of very small earth-stations (commonly called micro terminals) for data/voice communications, INTELSAT has introduced a new service called INTELNET. INTELNET services are designed to operate with two different modulation and coding techniques, i.e. spread spectrum and binary phase-shift keying (BPSK) with rate 1/2 forward error correction (FEC). The INTELNET I service is a data distribution service, whereas the INTELNET II service is a data collection service. These services are facilitated by the use of micro terminals at remote locations (i.e. outposts) which will be linked through the INTELSAT space segment to relatively large INTELSAT earth-stations (e.g. Standard A, B, C and E-3). INTELNET services are leased transponder services offered on a range of INTELSAT satellites in C- or Ku-bands on a pre-emptible or non-pre-emptible basis. These services are offered on a full-time or occasional-use basis, by assigning predetermined satellite resources of bandwidth and power with a smallest allotment of 1 MHz. In this paper, the system design and network architecture for the INTELNET I and II services are addressed. Representative transmission parameters have also been developed for the INTELNET I and II services. System cost considerations as a result of the use of micro terminals are analysed.