The Funambol J2ME Mail Client aims to be a light, easy to use, free email client for J2ME devices. The first release comes with a simple but effective UI, and a storage limited to the internal RMS only. This makes the application compatible with most of the phones around (minimum requirements are: MIDP2.0, CLDC 1.0, 512k of Storage). The mail synchronization using SyncML 1.2 over HTTP, thus removing any problem related to the access to IMAP or POP ports. The mail client synchonizes its address book with the one on the server, Its design is modular and can be extended in future with other mail protocols, a more sophisticated UI and access to the phone s AddressBook or filesystem for the devices allowing this. See the javadoc for more information on the structure of the library.
标签: J2ME Funambol devices Client
上传时间: 2014-01-05
上传用户:gououo
For solving the following problem: "There is No Free Lunch" Time Limit: 1 Second Memory Limit: 32768 KB One day, CYJJ found an interesting piece of commercial from newspaper: the Cyber-restaurant was offering a kind of "Lunch Special" which was said that one could "buy one get two for free". That is, if you buy one of the dishes on their menu, denoted by di with price pi , you may get the two neighboring dishes di-1 and di+1 for free! If you pick up d1, then you may get d2 and the last one dn for free, and if you choose the last one dn, you may get dn-1 and d1 for free. However, after investigation CYJJ realized that there was no free lunch at all. The price pi of the i-th dish was actually calculated by adding up twice the cost ci of the dish and half of the costs of the two "free" dishes. Now given all the prices on the menu, you are asked to help CYJJ find the cost of each of the dishes.
标签: Limit following solving problem
上传时间: 2014-01-12
上传用户:362279997
产品型号:HT9B92 产品品牌:HOLTEK/合泰 封装形式:TSSOP48/LQFP48 产品年份:新年份 原厂直销,工程服务,技术支持,价格更具优势! RAM 映射 36×4 LCD 显示驱动器 概述 HT9B92 是一款存储器映射和多功能LCD控制驱动芯片。该芯片显示模式有144 点(36×4 )。 HT9B92 软件配置特性使得它适用于多种LCD应用,包括LCD 模块和显示子系统。HT9B92 通过双线双向 I2C 接口与大多数微处理器/ 微控制器进行通信。 功能特点 ● 工作电压:2.4V~5.5V ● 内部集成振荡电路 ● Bias: 1/2 or 1/3; Duty: 1/4 ● 带电压跟随器的内部LCD 偏置发生器 ● 提供VLCD 引脚来调整LCD 工作电压 ● I2C接口 ● 可选 LCD 帧频率 ● 多达36×4 位RAM 用来存储显示数据 ● 最大显示模式36×4:36 SEGs 和4 COMs ● 多种闪烁模式:不闪烁,0.5Hz,1Hz,2Hz ● 写地址自动增加 ● 低功耗省电模式 ● 采用硅栅极CMOS 制造工艺 ● 封装类型:48-pin TSSOP/LQFP ● 市面可兼容型号:元泰VINTEK:VKL44A TSSOP48封装,VKL144B QFN48(6MM*6MM)封装,VKL128 LQFP44封装,VKL060 SSOP24封装 ------ 同种脚位可以任意切换,少脚位更具性价比高,方便设计等特点。 ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●● 产品型号:VKL144A 产品品牌:VINTEK/元泰 封装形式:TSSOP48 产品年份:新年份 原厂直销,工程服务,技术支持,价格更具优势! 超低功耗液晶LCD显示驱动芯片 概述 VKL144A是一款性能优越的字段式液晶显示驱动芯片,由于其驱动段位多达144段和超低功耗的工艺设计特点。还具有性能稳定和低价格优势、供货稳定,目前被业界广泛应用在众多的仪器仪表的产品上。比如手持式仪表、费率表、工控仪表、医疗仪器、专用测量仪表头等等设备上使用 功能特点 ● 液晶驱动输出: Common 输出4线 Segment 输出36线 ● 内置Display data RAM (DDRAM) 内置RAM容量:36*4 =144 bit ● 液晶驱动的电源电路 1/2 ,1/3 Bias ,1/4 Duty 内置Buffer AMP I2C串行接口(SCL, SDA) ● 内置振荡电路 ● 不需要外围部件 ● 低功耗设计 ● 搭载等待模式 ● 内置Power-on Reset电路 ● 搭载闪烁功能 ● 工作电源电压: 2.5-5.5V ★应用推荐: 各种费率表,电表、水表、气表、热表、各种计量专用表头。 ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●● 产品型号:VKL144B 产品品牌:VINTEK/元泰 封装形式:QFN48L(6MM*6MM) 产品年份:新年份 原厂直销,工程服务,技术支持,价格更具优势! 超低功耗液晶LCD显示驱动芯片 概述 VKL144B是一款性能优越的字段式液晶显示驱动芯片,由于其驱动段位多达144段和超低功耗的工艺设计特点。还具有性能稳定和低价格优势、供货稳定,目前被业界广泛应用在众多的仪器仪表的产品上。比如手持式仪表、费率表、工控仪表、医疗仪器、专用测量仪表头等等设备上使用 功能特点 ● 液晶驱动输出: Common 输出4线 Segment 输出36线 ● 内置Display data RAM (DDRAM) 内置RAM容量:36*4 =144 bit ● 液晶驱动的电源电路 1/2 ,1/3 Bias ,1/4 Duty 内置Buffer AMP I2C串行接口(SCL, SDA) ● 内置振荡电路 ● 不需要外围部件 ● 低功耗设计 ● 搭载等待模式 ● 内置Power-on Reset电路 ● 搭载闪烁功能 ● 工作电源电压: 2.5-5.5V ★应用推荐: 各种费率表,电表、水表、气表、热表、各种计量专用表头。 HOLTEK合泰全系列产品 芯片介绍如下: 一.LCD液晶显示驱动控制器 HT1620 HT1620G HT1621 HT1621B HT1621G HT1622 HT1622G HT1623 HT1625 HT1626 HT16C21 HT16C22 HT16C23 HT16C24 HT1620 HT16220 HT1647 HT1650 HT1660 HT1670 HT16K23 HT9B92 HT9B92G HT9B95A HT9B95B HT9B95C HT16LK24 HT16L21 HT16L23 HT1611C HT1613C HT1616C (全部封装、规格形式 均有海量现货!) 二:LED/VFD控制、驱动器 HT16506 HT16511 HT16512 HT16515 HT16514 HT16561 HT16562 HT16565 HT16566 HT16523 HT16525 HT1632C HT16K33 HT16K33 HT16528-001 HT16528-002 HT16528-003 (全部封装、规格形式 均有海量现货!) 三.Touch Key触摸按键电路/ I/O Flash MCU BS801B/C BS802B/C BS804B/C BS804B/C BS806B/C BS808B/C BS812A-1 BS813A-1 BS814A-1 BS814A-2 BS816A-1 BS818A-2 BS8112A-3 BS8116A-3 BS83A02A-4 BS83A04A-3 BS83A04A-4 BS83B04A-4 BS83B08A-3 BS83B08A-4 BS83B12A-3 BS83B12A-4 (全部封装、规格形式 均有海量现货!) 四.HT7XXX全系列 微功耗LDO HT1015-1 HT71xx-1 HT71xx-2 HT71xx-3 HT71xx-3 HT75xx-1 HT75xx-2 HT75xx-3 HT73xx HT72xx HT78xx Power management(电源LDO稳压管理IC) HT71**为30MA稳压芯片 产品:HT7130,HT7133,HT7136,HT7144,HT7150 HT75**为100MA稳压芯片 产品:HT7530,HT7533,HT7536,HT7544,HT7550 HT73**为300MA稳压芯片 产品:HT7318,HT7325,HT7327,HT7330,HT7333,HT7335,HT7350 HT70**为电压检测芯片 产品:HT7022,HT7024,HT7027,HT7033,HT7039,HT7044,HT7050 HT77::为升压DC-DC芯片 产品:HT7727,HT7730,HT7733,HT7737,HT7750 LDO与探测器和数据收发:HT71DXX 高电源抑制比300mA双LDO稳压器:HT72Dxxxx 高电源抑制比300mA LDO稳压器:HT72BXX 高电源抑制比 150mA LDO稳压器:HT75BXX 高电源抑制比 500mA LDO稳压器:HT78BXX 3SOT89 T/R 电压检测器系列(小功率):HT70xxA-1 HT70xxA-2 HT70xxA-3 PFM升压DC-DC变换器:HT77xx HT77xxA HT77S10 HT77S11 PFM同步升压直流/直流转换器:HT77xxS HT77xxSA LED照明驱动:HT7L4811 HT7L4091 HT7L4091 HT7L2102 HT7L2103 HT7L2103 白光LED背光驱动:HT7936 HT7937 HT7938 HT7938A HT7939 HT7943 HT7945 降压直流-直流转换器:HT7465 HT7466 AC/DC PWM变换器:HT7A3942 HT7A6002 HT7A6003 HT7A4016 充电泵直流/直流转换器:HT7660 (全部封装、规格形式 均有海量现货!) 五:时钟IC及其他消费类IC HT1380 HT1380A HT1381 HT1381A HT1382 HT9200A HT9170 HT9172 HT9032 HT8970 HT9247 HT82V731 HT82V736 HT6221 HT6222 HT62104 HT12A\E HT12D\F (全部封装、规格形式 均有海量现货!) 六.电可擦除只读存储器 HT2201 HT24LC02 HT24LC02A HT24LC04 HT24LC08 HT24LC16 HT24LC32 HT24LC64 HT24LC128 HT24LC256 HT93LC46 HT93LC66 HT93LC86 (全部封装、规格形式 均有海量现货!) 七.各类编码/射频/解码器 HT12D HT12E HT12F HT6010 HT6012 HT6014 HT6026 HT6030 HT6032 HT6034 HT600 HT604L HT6207 HT680 HT6P20B HT6P20D HT6P40B2 HT6P40C2 HT6P40D2 HT6P40E2 HT6P40B2T3 HT6P40C2T3 HT6P40D2T3 HT6P40E2T3 HT6P423A HT6P423A HT6P427A HT6P433A HT6P437A HT12C2T3 HT12C2T4 HT12E2T3 HT12E2T4 HT12E2T4 HT16C2T3 HT16C2T4 HT16E2T3 HT16E2T4 HT16G2T3 HT16G2T4 HT9831 HT7610A HT7611A/B HT7612 HT7612B (全部封装、规格形式 均有海量现货!) 八.MCU(微控IC) HT48 系列 应用于遥控,电扇/电灯控制,洗衣机控制,电子秤,玩具及各种系统控制. 产品:HT48R05,HT48R06,HT48R30,HT48R50 HT49系列 应用于多种LCD DI低功耗应用,如电子秤,休闲产品,高阶的家用电器 产品:HT49R30,HT49R50 HT46带A/D系列 适用于充电器控制,电磁炉等 产品:HT46R47,HT46R22,HT46R23,HT46R24,HT46R51 HT46带A/D及LCD系列 适用于洗衣机控制器,相机控制器和带LCD显示的家用电器系列 产品:HT46R62,HT46R63,HT46R64 HT48RA系列适用于红外遥控器以及各种电子系统的控制器 (全部封装、规格形式 均有海量现货!) 九.放大器/音频放大器 /DA转换器 HT9231 HT9232 HT9234 HT9251 HT9252 HT9254 HT9274 HT9291 HT9292 HT9294 HT82V732 HT82V733 HT82V735 HT82V736 HT82V736 HT82V739 HT82V73 HT82V731 HT82V737 HT82V738 (全部封装、规格形式 均有海量现货!) 十.音调IC/发生器 /接收器 HT9200A HT9200B HT9170B HT9170D HT9172 HT8970 HT8972 (全部封装、规格形式 均有海量现货!) IC型号众多,未能一一收录。 芯片主要应用领域如下: ★显示模块:电子秤、无线麦克风、录音笔、影音多媒体、小家电周边 ★家电类:电风扇、电饭煲、玩具、冷气机、暖风机、空调扇、饮水机、抽油烟机、消毒柜、电热水器、面包机、豆浆机、咖啡壶、电冰箱、洗衣机控制器、空调控制板等。 ★通讯类:来电显示电话、无绳电话、IC电话、投币电话、对讲机等 ★玩具游戏类:无线遥控车、PS游戏机、跳舞毯、方向盘、手柄、电子枪、PS开机IC等。 ★计算机周边:显示器控制、PC-MOUSE、单/双滚、遥控MOUSE、键盘、手写板等。 ★智能卡类:IC卡煤气表、电能表、水表、IC读写器、IC卡门禁系统等。 ★汽车及防盗类:机车防盗器、********器、汽车天线控制器、里程表、汽车日历等。 ★医用保健类:电子针灸器、甩脂机、智能体温计、LCD显示血压计、跑步机、按摩器、按摩垫、按摩椅 等。 ★仪表类:电压表、瓦斯表、电池电压检测器、频率计、计数器、电度表、水位检测器等。 ★其它类:充电器、照相机、电子万年钟、自动给皂机、路灯控制器、呼叫服务器等
标签: TSSOP B92 HT9 LCD HT 9B 92 48 合泰 液晶驱动
上传时间: 2018-12-07
上传用户:shubashushi66
Wireless means different things to different people. For this book, it refers to the radio systems that provide point-to-point, point-to-multipoint, and Earth-space communications over transmission links that propagate outside buildings through the lower atmosphere. Wireless systems are being built that provide data transmission between computers and other devices on one’s own desk. These are part of the wireless world but not the part where, except for interference perhaps, the atmosphere has any influence. The intent of this book is to provide a description of the physical phenomena that can affect propagation through the atmosphere, present sample measurements and statistics, and provide models that system designers can use to calculate their link budgets and estimate the limitations the atmosphere may place on their design.
标签: Communication Propagation Handbook Wireless for
上传时间: 2020-05-31
上传用户:shancjb
Nowadays sensors are part of everyday life in a wide variety of fields: scientific applications, medical instrumentation, industrial field, ...and, last but not least, popular mass production and low-cost goods, like smartphones and other mobile devices. Markets and business behind the field of sensors are quite impressive. A common trend for consumer applications is miniaturization which requires, on one side, a lot of research, development efforts, and resources but, on the other hand, allows costs and final application size reduction. In this scenario scientific community and industries are very active to drive innovation.
标签: Magnetometers Lorentz Force MEMS
上传时间: 2020-06-06
上传用户:shancjb
This book is based on a Ph.D. research that has been conducted at the Delft University of Technology in the Netherlands in collaboration with Dutch Electricity & Gas Distribution Network Operator, Stedin. This book was written as a result of wider interest that was shown by different industry groups on this topic after its public defence. This inspired the author to modify and publish a practical version of the research for a greater international audience. Therefore, the content of this book is intended for a double audience, on the one hand for those interested in the organisational and management aspects of maintenance.
标签: Maintenance Electricity Risk-Based Network for
上传时间: 2020-06-07
上传用户:shancjb
特点: 精确度0.1%满刻度 可作各式數學演算式功能如:A+B/A-B/AxB/A/B/A&B(Hi or Lo)/|A|/ 16 BIT类比输出功能 输入与输出绝缘耐压2仟伏特/1分钟(input/output/power) 宽范围交直流兩用電源設計 尺寸小,穩定性高
上传时间: 2014-12-23
上传用户:ydd3625
开关在电路中起接通信号或断开信号的作用。最常见的可控开关是继电器,当给驱动继电器的驱动电路加高电平或低电平时,继电器就吸合或释放,其触点接通或断开电路。CMOS模拟开关是一种可控开关,它不象继电器那样可以用在大电流、高电压场合,只适于处理幅度不超过其工作电压、电流较小的模拟或数字信号。 一、常用CMOS模拟开关引脚功能和工作原理 1.四双向模拟开关CD4066 CD4066 的引脚功能如图1所示。每个封装内部有4个独立的模拟开关,每个模拟开关有输入、输出、控制三个端子,其中输入端和输出端可互换。当控制端加高电平时,开关导通;当控制端加低电平时开关截止。模拟开关导通时,导通电阻为几十欧姆;模拟开关截止时,呈现很高的阻抗,可以看成为开路。模拟开关可传输数字信号和模拟信号,可传输的模拟信号的上限频率为40MHz。各开关间的串扰很小,典型值为-50dB。
上传时间: 2013-10-27
上传用户:bibirnovis
减小电磁干扰的印刷电路板设计原则 内 容 摘要……1 1 背景…1 1.1 射频源.1 1.2 表面贴装芯片和通孔元器件.1 1.3 静态引脚活动引脚和输入.1 1.4 基本回路……..2 1.4.1 回路和偶极子的对称性3 1.5 差模和共模…..3 2 电路板布局…4 2.1 电源和地…….4 2.1.1 感抗……4 2.1.2 两层板和四层板4 2.1.3 单层板和二层板设计中的微处理器地.4 2.1.4 信号返回地……5 2.1.5 模拟数字和高压…….5 2.1.6 模拟电源引脚和模拟参考电压.5 2.1.7 四层板中电源平面因该怎么做和不应该怎么做…….5 2.2 两层板中的电源分配.6 2.2.1 单点和多点分配.6 2.2.2 星型分配6 2.2.3 格栅化地.7 2.2.4 旁路和铁氧体磁珠……9 2.2.5 使噪声靠近磁珠……..10 2.3 电路板分区…11 2.4 信号线……...12 2.4.1 容性和感性串扰……...12 2.4.2 天线因素和长度规则...12 2.4.3 串联终端传输线…..13 2.4.4 输入阻抗匹配...13 2.5 电缆和接插件……...13 2.5.1 差模和共模噪声……...14 2.5.2 串扰模型……..14 2.5.3 返回线路数目..14 2.5.4 对板外信号I/O的建议14 2.5.5 隔离噪声和静电放电ESD .14 2.6 其他布局问题……...14 2.6.1 汽车和用户应用带键盘和显示器的前端面板印刷电路板...15 2.6.2 易感性布局…...15 3 屏蔽..16 3.1 工作原理…...16 3.2 屏蔽接地…...16 3.3 电缆和屏蔽旁路………………..16 4 总结…………………………………………17 5 参考文献………………………17
上传时间: 2013-10-24
上传用户:18165383642
目录 第一章 传输线理论 一 传输线原理 二 微带传输线 三 微带传输线之不连续分析 第二章 被动组件之电感设计与分析 一 电感原理 二 电感结构与分析 三 电感设计与模拟 电感分析与量测
标签: 传输线
上传时间: 2013-12-12
上传用户:浩子GG