matrix n. (pl. matrices 或matrixes) 1.【解剖學(xué)】子宮;母體;發(fā)源地,策源地,搖籃;【生物學(xué)】襯質(zhì)細(xì)胞;間質(zhì);基質(zhì);母質(zhì)。 2. 【礦物】母巖;脈石;【冶金】基體;【地質(zhì)學(xué);地理學(xué)】脈石;填質(zhì);雜礦石。 3. 【印刷】字模;型版,紙型;鑄型,陰模。 4.【陣】(矩)陣,方陣;母式;【物理學(xué)】間架;【無線電】矩陣變換電路。 5.【染】原色〔紅黃藍(lán)白黑五種〕。 the matrix of a nail 【解剖學(xué)】指甲床。
matrix, the 駭客任務(wù),又名:二十二世紀(jì)殺人網(wǎng)絡(luò)或黑客帝國
For the anticounterfeiting of printings ( such as certificate ) , the existent many ways ( such as rainbow holograms ) are not available as the need for special use : anti - distortion and anti - copy . basing in the double - random - phase transform , this article puts forward a new way that two - dimensional bar code is used as anticounterfeiting label with anti - printing ? scanning and anti - damage properties . the major job are : ( 1 ) . basing in the ascii codes , numerals and alphabets are encoded and subsequently transformed into two - value bar code matrix figure . later , using amplitude - based double - random - phase transform , the enciphered gray scale figure is formed . by computer simulation ( 4f system ) and printing as well as scanning ( 20 times ) , we get the result that the gray scale figure with little miscoding rate ( 0 . 0026 ) by “ matrix expanding way ” 本文主要開展了以下三項(xiàng)研究工作: ( 1 ) .用自定義編碼方案,將數(shù)字和字母( ascii碼)轉(zhuǎn)換成二值條碼圖;對該圖形進(jìn)行振幅型雙隨機(jī)相位加密變換,得到原信息的加密灰度圖;通過4f光學(xué)系統(tǒng)計(jì)算機(jī)模擬和打印-掃描實(shí)驗(yàn),證明本文提出的“矩陣擴(kuò)展法”灰度圖具有較小的誤碼率,對于20次打印-掃描實(shí)驗(yàn),誤碼率不大于0 . 0026 。
This thesis introduces the concept of qosmecs and proposes a new method to construct the square - matrix embeddable space - time block codes matrices based on the works of tarokh , alamouti and jafakhani etc . comparing to the previous works , the construction formulas presented here are much simple with the same performance of the matrices constructed 本文基于tarokh 、 alamouti和jafakhani等人的研究成果,引入了準(zhǔn)正交方陣嵌入碼的概念,提出了一種新穎的方陣嵌入空時(shí)分組碼的設(shè)計(jì)方法。在生成同樣性能碼矩陣的情況下,本文提出的構(gòu)造公式與已有設(shè)計(jì)方法相比要簡單得多。