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Multiple-Choice

  • SQL Performance Tuning is a handbook of practical solutions for busy database professionals charged

    SQL Performance Tuning is a handbook of practical solutions for busy database professionals charged with managing an organization s critically important data. Covering today s most popular and widely installed database environments, this book is an indispensable resource for managing and tuning SQL across multiple platforms.

    标签: professionals Performance practical solutions

    上传时间: 2013-12-20

    上传用户:jjj0202

  • Microphone Arrays : A Tutorial

    This report presents a tutorial of fundamental array processing and beamforming theory relevant to microphone array speech processing. A microphone array consists of multiple microphones placed at different spatial locations. Built upon a knowledge of sound propagation principles, the multiple inputs can be manipulated to enhance or attenuate signals emanating from particular directions. In this way, microphone arrays provide a means of enhancing a desired signal in the presence of corrupting noise sources. Moreover, this enhancement is based purely on knowledge of the source location, and so microphone array techniques are applicable to a wide variety of noise types. Microphone arrays have great potential in practical applications of speech processing, due to their ability to provide both noise robustness and hands-free signal acquisition.

    标签: Microphone array Tutorial Array Signal Processing

    上传时间: 2016-06-12

    上传用户:halias

  • PSO多目标寻优

    evolution computing 现在最火的一篇论文 Handling Multiple Objectives With Particle Swarm Optimization

    标签: PSO 多目标

    上传时间: 2016-07-01

    上传用户:白水煮瓜子

  • msp430

    msp430The LDC1312 and LDC1314 are 2- and 4-channel, 1• Easy-to-use – minimal configuration required 12-bit inductance to digital converters (LDCs) for • Measure up to 4 sensors with one IC inductive sensing solutions. With multiple channels • Multiple channels support environmental and and support for remote sensing, the LDC1312 and aging compensation LDC1314 enable the performance and reliability benefits of inductive sensing to be realized at minimal• Multi-channel remote sensing provides lowest cost and power. The products are easy to use, onlysystem cost requiring that the sensor frequency be within 1 kHz • Pin-compatible medium and high-resolution and 10 MHz to begin sensing. The wide 1 kHz to 10 options MHz sensor frequency range also enables use of very small PCB coils, further reducing sensing– LDC1312/4: 2/4-ch 12-bit LDC solution cost and size.– LDC1612/4: 2/4-ch 28

    标签: msp 430

    上传时间: 2016-07-22

    上传用户:tongmoonsky

  • libnids-Win32

    V1.16 Win32 July 2012 - Ported to Win32 C++ - Allow multiple instances of libnids to coexist in the same process - Incorporate unofficial patch to track established TCP connections - Migration of calls to secure versions (i.e. strcpy to strcpy_s) - Compiles under Visual Studio 2010 with no warnings at W4 - Linux support well and truly broken, Linux specific code removed

    标签: libnids-Win32

    上传时间: 2016-07-30

    上传用户:mxgg126

  • 传感器网络中基于到达时间差有效的凸松弛方法的稳健定位

    We consider the problem of target localization by a network of passive sensors. When an unknown target emits an acoustic or a radio signal, its position can be localized with multiple sensors using the time difference of arrival (TDOA) information. In this paper, we consider the maximum likelihood formulation of this target localization problem and provide efficient convex relaxations for this nonconvex optimization problem.We also propose a formulation for robust target localization in the presence of sensor location errors. Two Cramer-Rao bounds are derived corresponding to situations with and without sensor node location errors. Simulation results confirm the efficiency and superior performance of the convex relaxation approach as compared to the existing least squares based approach when large sensor node location errors are present.

    标签: 传感器网络

    上传时间: 2016-11-27

    上传用户:xxmluo

  • 元泰VINTEK原厂:VK3809IP/VK3813IP/VK3816IP高抗干扰触摸感应系列

    产品品牌:VINTEK/元泰/VINKA —— ­原厂直销,样品免费,技术支持,大量现货! 产品型号:VK3809IP      封装形式:SOP16贴片       产品年份:新年份 联 系 人:许先生        联 系 QQ:1918885898       联系手机:18898582398 原厂直销触摸触控感应芯片,多种形式选择更专业,原装正品保障,价格更具优势! 概述 VK3809IP 是一款9感应通道高抗干扰的触摸IC,工作电压:2.5V-5.5V,工作电流:1.1MA-3V,IIC/INT通讯口。可设置为9个独立按键或者最多3组滑条,可通过IIC设置工作模式和参数,可以通过CAP脚电容调节灵敏度。封装是SOP16。应用于大小家电,门禁监控和消费类电子。 ★软件简介: 此软件系提供给客户一个简易设定的滑条按键应用方案。客户只要使用 IIC 通讯格式,即可设定并读取滑条按键及独立按键触摸数据。 特色 : 1.此应用使用 16 个 Touch Pad 让客户可依照设计上的需求进行规划。16 个      Touch PAD 可规划为滑条按键或是独立按键,滑条多可规划为 3 组滑条。当无滑条按键设定时,16 Key 都可做独立按键使用。 2.修改设定参数的方式有两种,用户可配合 USB PCLink Board 来调整滑条按键  触摸灵敏度等参数,然后利用 IIC 写入指令来修改设定参数。 3.程序的独立按键输出模式有两种 Multiple 以及 Single,当选则为Multiple 时会将所有按下的按键输出,而选择 Single 时只会输出第一个按下的按键,当按键被放开时,才会输出下一个按键。 4.设计有省电模式,适合用在如遥控器等需要长时间待机的应用。 5.有 4 组 Slave address,可由外部开关切换。  产品应用范围: 大小家电     门禁监控设备     消费类电子 ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●● 产品品牌:VINTEK/元泰/VINKA —— ­原厂直销,样品免费,技术支持,大量现货! 产品型号:VK3813IP      封装形式:SSOP20贴片       产品年份:新年份 联 系 人:许先生        联 系 QQ:1918885898       联系手机:18898582398 原厂直销触摸触控感应芯片,多种形式选择更专业,原装正品保障,价格更具优势! 概述 VK3813IP 是一款13感应通道高抗干扰的触摸IC,工作电压:2.5V-5.5V,工作电流:1.1MA-3V,IIC/INT通讯口。可设置为13个独立按键或者最多3组滑条,可通过IIC设置工作模式和参数,可以通过CAP脚电容调节灵敏度。封装是SSOP20。应用于大小家电,门禁监控和消费类电子。 特色 : 1. 此应用使用 13 个 Touch Pad 让客户可依照设计上的需求进行划。13 个 Touch PAD 可规划为滑条按键或是独立按键,滑条多可规划为 3 组滑条。当无滑条按键设定时,13 Key 都可做独立按键使用。 2.修改设定参数的方式有两种,用户可配合 USB PCLink Board 来调整滑条按键触摸灵敏度等参数,然后利用 IIC 写入指令来修改设定参数。 3.程序的独立按键输出模式有两种 Multiple 以及 Single,当选则为Multiple 时会将所有按下的按键输出,而选择 Single 时只会输出第一个按下的按键,当按键被放开时,才会输出下一个按键。 4. 设计有省电模式,适合用在如遥控器等需要长时间待机的应用。 产品应用范围: 大小家电  门禁监控设备和消费类电子 ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●● 产品品牌:VINTEK/元泰/VINKA —— ­原厂直销,样品免费,技术支持,大量现货! 产品型号:VK3816IP      封装形式:SSOP28贴片       产品年份:新年份 联 系 人:许先生        联 系 QQ:1918885898       联系手机:18898582398 原厂直销触摸触控感应芯片,多种形式选择更专业,原装正品保障,价格更具优势! 概述 VK3816IP 是一款16感应通道高抗干扰的触摸IC,工作电压:2.5V-5.5V,工作电流:1.1MA-3V,IIC/INT通讯口。可设置为16个独立按键或者最多3组滑条,IIC设备地址可通过2个输入脚设置,可通过IIC设置工作模式和参数,可以通过CAP脚电容调节灵敏度。封装是SSOP28。应用于大小家电,门禁监控和消费类电子。 特色 : 1. 此应用使用 16 个 Touch Pad 让客户可依照设计上的需求进行规划。16 个 Touch PAD 可规划为滑条按键或是独立按键,滑条多可规划为 3 组滑条。当无滑条按键设定时,16 Key 都可做独立按键使用。 2. 修改设定参数的方式有两种,用户可配合 USB PCLink Board 来调整滑条按键触摸灵敏度等参数,然后利用 IIC 写入指令来修改设定参数。 3. 程序的独立按键输出模式有两种 Multiple 以及 Single,当选则为Multiple 时会将所有按下的按键输出,而选择 Single 时只会输出第一个按下的按键,当按键被放开时,才会输出下一个按键。 4. 设计有省电模式,适合用在如遥控器等需要长时间待机的应用。 5. 有 4 组 Slave address,可由外部开关切换。 产品应用范围: 大小家电门     禁监控设备     消费类电子

    标签: 原装正品 工程技术支持

    上传时间: 2018-12-12

    上传用户:shubashushi66

  • 介绍高抗干扰触摸芯片VK38系列---9/10/11/12/13/14/15/16通道按键

    产品品牌:VINTEK/元泰/VINKA —— ­原厂直销,样品免费,技术支持,大量现货! 产品型号:VK3813IP      封装形式:SSOP20贴片       产品年份:新年份 联 系 人:许先生        联 系 QQ:1918885898       联系手机:18898582398 原厂直销触摸触控感应芯片,多种形式选择更专业,原装正品保障,价格更具优势! 概述 VK3813IP 是一款13感应通道高抗干扰的触摸IC,工作电压:2.5V-5.5V,工作电流:1.1MA-3V,IIC/INT通讯口。可设置为13个独立按键或者最多3组滑条,可通过IIC设置工作模式和参数,可以通过CAP脚电容调节灵敏度。封装是SSOP20。应用于大小家电,门禁监控和消费类电子。 特色 : 1. 此应用使用 13 个 Touch Pad 让客户可依照设计上的需求进行划。13 个 Touch PAD 可规划为滑条按键或是独立按键,滑条多可规划为 3 组滑条。当无滑条按键设定时,13 Key 都可做独立按键使用。 2.修改设定参数的方式有两种,用户可配合 USB PCLink Board 来调整滑条按键触摸灵敏度等参数,然后利用 IIC 写入指令来修改设定参数。 3.程序的独立按键输出模式有两种 Multiple 以及 Single,当选则为Multiple 时会将所有按下的按键输出,而选择 Single 时只会输出第一个按下的按键,当按键被放开时,才会输出下一个按键。 4. 设计有省电模式,适合用在如遥控器等需要长时间待机的应用。 产品应用范围: 大小家电  门禁监控设备和消费类电子

    标签: 高抗干扰 触摸芯片

    上传时间: 2018-12-12

    上传用户:shubashushi66

  • Data+Processing+in+Smart+Cities

    Smart Grids provide many benefits for society. Reliability, observability across the energy distribution system and the exchange of information between devices are just some of the features that make Smart Grids so attractive. One of the main products of a Smart Grid is to data. The amount of data available nowadays increases fast and carries several kinds of information. Smart metres allow engineers to perform multiple measurements and analyse such data. For example, information about consumption, power quality and digital protection, among others, can be extracted. However, the main challenge in extracting information from data arises from the data quality. In fact, many sectors of the society can benefit from such data. Hence, this information needs to be properly stored and readily available. In this chapter, we will address the main concepts involving Technology Information, Data Mining, Big Data and clustering for deploying information on Smart Grids.

    标签: Processing Cities Smart Data in

    上传时间: 2020-05-23

    上传用户:shancjb

  • Data+Processing+in+Smart+Cities

    Smart Grids provide many benefits for society. Reliability, observability across the energy distribution system and the exchange of information between devices are just some of the features that make Smart Grids so attractive. One of the main products of a Smart Grid is to data. The amount of data available nowadays increases fast and carries several kinds of information. Smart metres allow engineers to perform multiple measurements and analyse such data. For example, information about consumption, power quality and digital protection, among others, can be extracted. However, the main challenge in extracting information from data arises from the data quality. In fact, many sectors of the society can benefit from such data. Hence, this information needs to be properly stored and readily available. In this chapter, we will address the main concepts involving Technology Information, Data Mining, Big Data and clustering for deploying information on Smart Grids.

    标签: Processing Cities Smart Data

    上传时间: 2020-05-25

    上传用户:shancjb