This program uses Markowitz portofolio theory to find combination of stocks in a portfolio which has minimum variance for expected returns
標(biāo)簽： combination portofolio Markowitz portfolio
上傳時(shí)間： 2017-05-07
上傳用戶：李彥東
Delphi for fun library v12, latest. This is the library for manuplating list, combination-permutation, BigNumbers etc. i think it s a must library to use. give a try.
標(biāo)簽： library combination-permutati manuplating for
上傳時(shí)間： 2017-05-20
上傳用戶：nanshan
the combination of keil and proteus
標(biāo)簽： combination proteus keil the
上傳時(shí)間： 2017-06-12
上傳用戶：rocwangdp
Description combination of book reader and Web browsers. This program can be used for Web browsing, reading news sites, downloading and reading books and atricles from the Web. It is not implement all HTML browser functionality - it doesn t show images and is not able to proceed forms. The main idea was to make it possible to view normal sites (not WAP sites) on very small screen of mobile phone. This application share a lot of code with MobiReader and first of all is inteded to be used to browse text data.
標(biāo)簽： Description combination Web browsers
上傳時(shí)間： 2013-12-16
上傳用戶：qweqweqwe
實(shí)現(xiàn)實(shí)時(shí)語音的錄入以及與RS232串口完美結(jié)合-Real-time voice input and the perfect combination with the RS232 serial port
上傳時(shí)間： 2013-05-16
上傳用戶：大三三
介紹一種多功能音樂播放器，它是以AT89S52單片機(jī)為核心，并輔有一些外圍器件，采用匯編語言編寫程序，實(shí)現(xiàn)多功能音樂播放，歌曲自動(dòng)循環(huán)播放和使用琴鍵自編曲目功能。此外，彩燈顯示歌曲節(jié)奏，按鍵跳轉(zhuǎn)到喜愛曲目，液晶顯示當(dāng)前播英文曲目。并給出了系統(tǒng)軟硬件設(shè)計(jì)。 Abstract: It introduces a multifunctional music player,taking AT89S52 single-chip microcomputer as hardware control core and using some peripheral elements.Programmes are compiled in assembly language to act as expected.There are two functional modes in this system.One is to make the music play automatically and consecutively,the other is to compose new songs through keys.In addition,lights show the pace of music and the English names can be displayed in the liquid crystal screen.With perfect combination of hardware and software,the music player can meet many music lovers’needs for multifunctional music player.And the hardware and software of the system are given.
上傳時(shí)間： 2013-11-18
上傳用戶：xiaodu1124
The PCA9549 provides eight bits of high speed TTL-compatible bus switching controlledby the I2C-bus. The low ON-state resistance of the switch allows connections to be madewith minimal propagation delay. Any individual A to B channel or combination of channelscan be selected via the I2C-bus, determined by the contents of the programmable Controlregister. When the I2C-bus bit is HIGH (logic 1), the switch is on and data can flow fromPort A to Port B, or vice versa. When the I2C-bus bit is LOW (logic 0), the switch is open,creating a high-impedance state between the two ports, which stops the data flow.An active LOW reset input (RESET) allows the PCA9549 to recover from a situationwhere the I2C-bus is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C-busstate machine and causes all the bits to be open, as does the internal power-on resetfunction.
標(biāo)簽： switch Octal 9549 with
上傳時(shí)間： 2014-11-22
上傳用戶：xcy122677
The PCA9546A is a quad bidirectional translating switch controlled via the I2C-bus. TheSCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individualSCx/SDx channel or combination of channels can be selected, determined by thecontents of the programmable control register.
標(biāo)簽： channel 9546A 9546 PCA
上傳時(shí)間： 2013-11-16
上傳用戶：cc1915
The PCA9548A is an octal bidirectional translating switch controlled via the I2C-bus. TheSCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individualSCx/SDx channel or combination of channels can be selected, determined by thecontents of the programmable control register.An active LOW reset input allows the PCA9548A to recover from a situation where one ofthe downstream I2C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets theI2C-bus state machine and causes all the channels to be deselected as does the internalPower-on reset function.
標(biāo)簽： channel 9548A 9548 PCA
上傳時(shí)間： 2013-10-13
上傳用戶：bakdesec
The Philips family of Multiplexers and Switches consists of bi-directional translating switches controlled via the I2C or SMBus to fan out an upstream SCL/SDA pair to 2, 4 or 8 downstream channels of SCx/SDx pairs. The Multiplexers allow only one downstream channel to be selected at a time, while the Switches allow any individual downstream channel or combination of downstream channels to be selected, depending on the content of the programmable control register. Once one or several channels have been selected, the device acts as a wire, allowing the master on the upstream channel to send commands to devices on all the active downstream channels, and devices on the active downstream channels to communicate with each other and the master. External pull-up resistors are used to pull each individual channel up to the desired voltage level. Combined interrupt output and hardware reset input are device options that are featured.
上傳時(shí)間： 2013-10-11
上傳用戶：dianxin61
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