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技术资料 COMSOL声学模块介绍

Mathematical modeling has become an important part of the research and devclopment work in engineering and scicnce. Retaining a competitive edge requiresa fast path between ideas and prototypes, and in this regard mathematical modeling and simulation provide a valuable shortcut for understanding bot ...
https://www.eeworm.com/dl/835906.html
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技术资料 TEF665X 用户指南

TEF665XA (‘Atomic-2’) is a series of unparalleled single-chip car radio devices with a mainstream performance and feature set. The Atomic-2 series consists of two variants; TEF6657A and TEF6659A. The TEF6657A (Atomic-2 Premium) offers worldwide FM and full AM reception including short wave (SW) up ...
https://www.eeworm.com/dl/848301.html
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技术资料 基于Qt_E的嵌入式GUI的研究及其移植

图形用户界面(Graphic User Interface, 简称GUI)的广泛流行是当今计算机技术的重大成就之一, 它极大地方便了非专 业用户的使用。本文简要介绍当前国内外几种嵌入式GUI 系统的实现方式与特点。对基于Qt 的嵌入式GUI———Qt/Embedded 的交叉开发平台、窗口系统、图形引擎的实现技术以及Qt 的核心特性———信号与槽机制进行 ...
https://www.eeworm.com/dl/944327.html
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技术资料 基于单片机的温湿度实时监控系统设计与实现

针对某些特殊场所需要实时温湿度测量的问题,设计实现了基于单片机的温湿度实时监控系统。系统采用STC89C52单片机作为微处理器芯片,外接DHT11温湿度传感器进行温湿度数据监测采集;选用LCD1602液晶显示器对单片机处理过的温湿度数据进行显示;采用串口蓝牙通信模块和蜂鸣器与单片机连接。当温度超过用户设定的阈值时,蜂鸣器响 ...
https://www.eeworm.com/dl/896075.html
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资料/手册 DS18B20中文资料

FEATURES  Unique 1-Wire interface requires only one port pin for communication  Multidrop capability simplifies distributed temperature sensing applications  Requires no external components  Can be powered from data line. Power supply range is 3.0V to 5.5V  Zero standby power required  Measur ...
https://www.eeworm.com/dl/541/13760.html
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模拟电子 二极管导通开关稳压器引发的故障时间

  Most circuit designers are familiar with diode dynamiccharacteristics such as charge storage, voltage dependentcapacitance and reverse recovery time. Less commonlyacknowledged and manufacturer specifi ed is diode forwardturn-on time. This parameter describes the timerequired for a diode t ...
https://www.eeworm.com/dl/571/21345.html
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教程资料 CPLD库指南

Xilinx is disclosing this user guide, manual, release note, and/or specification (the “Documentation”) to you solely for use in the development of designs to operate with Xilinx hardware devices. You may not reproduce, distribute, republish, download, display, post, or transmit the D ...
https://www.eeworm.com/dl/fpga/doc/32639.html
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可编程逻辑 CPLD库指南

Xilinx is disclosing this user guide, manual, release note, and/or specification (the “Documentation”) to you solely for use in the development of designs to operate with Xilinx hardware devices. You may not reproduce, distribute, republish, download, display, post, or transmit the D ...
https://www.eeworm.com/dl/kbcluoji/40193.html
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数据库系统 重写了微软提供SQLHelper(共用的数据库调用接口) 1把SqlHelper的connectionString做成一个全局量

重写了微软提供SQLHelper(共用的数据库调用接口) 1把SqlHelper的connectionString做成一个全局量,统一设置数据库连接字符串 2增加了返回特定表名的DataSet的各接口。 可在项目的config文件设置数据库连接字符串 private static string connectionString = System.Configuration.ConfigurationSettings.AppSettings["Conne ...
https://www.eeworm.com/dl/523/115914.html
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教育系统应用 【功能简介】 多用户管理分权限发布、管理书籍资料。 大类小类两级无限制软件分类、无限制添加书籍资料。 资料批量删除、批量分类转移等批量管理功能。 采用交互性的订单处理方

【功能简介】 多用户管理分权限发布、管理书籍资料。 大类小类两级无限制软件分类、无限制添加书籍资料。 资料批量删除、批量分类转移等批量管理功能。 采用交互性的订单处理方式 客户管理功能 会员制度,分VIP会员和一般会员,并提供不同的优惠 书本评论、管理功能。 完善而方便的书籍资料添加、编辑表单 ...
https://www.eeworm.com/dl/621/160365.html
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