sess 中文意思是什麼

sess 解釋
表示走
  1. Shanghai zhengcai metalwork ltd. was found at 2001, we pre - ferical produce all kinds of carport, bike shed, export hardw - are and foreign trade. the company pos - sess of seasoned te - chnical personnels andworkers

    上海正彩金屬製品有限公司成立於2001年，是一家生產各式停車棚、停車架、出口金屬製品及貿易多元化為一體的專業公司。公司擁有優秀的開發設計員，經驗豐富、技術過硬的生產隊伍和完善的生產設備。
  2. In this thesis, first, we present the theory of sess system, the generation of the sess spreading code and its characteristics and the acquisition theory of conventional spread spectrum communication system. an efficient acquisition scheme based on periodically transmitting the synchronization head, which is composed of binary chaotic codes, using the matched filter and automatic decision threshold - level control based on a so - called constant false alarm criterion for sess system is present. the acquisition model of sess system is built and simulated in the awgn channel, the raleigh fading channel and imulti - address interfere condition

    本文首先概述了自編碼擴頻通信的原理、自編碼擴頻序列的產生方法及其特性和擴頻通信系統編碼同步的理論，然後針對自編碼擴頻通信系統提出了擴頻序列捕獲方案:周期性地加入混沌序列同步碼，並採用恆虛警率匹配濾波器捕獲法;在加性白高斯噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬，分析了各種捕獲性能:在選擇性能最優的混沌序列、適當的序列長度、虛警概率及門限值的情況下，可以獲得較短的捕獲時間和較大的捕獲概率。
  3. Appropriate data compression methods are needed to assure the random nature of the information source and to enlarge its entropy. in this thesis, first, we present the theory of sess system, then the acquisition method of sess system is discussed in detail, finally, a acquisition model of sess system is built and simulated in the awgn channel, in the raleigh fading channel and in multi - address interfere condition. the simulation results show the acquisition method of sess system can be just as reliable as the conventional dsss systems

    本文首先對自編碼擴頻通信的基本原理，自編碼擴頻序列的產生方法及其產生的序列的特性進行了概述，然後詳細討論了直擴通信系統中的擴頻碼的捕獲跟蹤問題，根據自編碼擴頻通信的特點，設計了其捕獲跟蹤方案，並在加性高斯白噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬。
  4. Therefore, fast and reliable synchronization algorithm is one of key technologies in sess system

    因此，迅速、可靠地建立同步是自編碼擴頻通信最主要的環節之一。
  5. In sess, the special way producing the spreading codes determines that the spreading codes are more important in sess communication system

    在自編碼擴頻通信中，特殊的擴頻序列產生方式決定了自編碼擴頻序列對于整個系統性能的影響更是巨大的。
  6. Some novel technologies are also proposed, such as two dimensional spread spectrum ( 2d - ss ), self - encoded spread spectrum ( sess ), multiple input multiple output ( mimo ), orthogonal frequency division multiplexing ( ofdm ) and so on

    另外，對目前新興的一些抗干擾技術，如二維擴頻、超寬帶、多天線、自編碼擴頻等技術也做了簡單分析。
  7. The data recovery at the receiver requires the spreading codes. in sess system, the receiver doesn ’ t know which spreading code will be used, so first it must de - spread the received signal correctly to regenerate the spreading code

    自編碼擴頻系統的擴頻序列是接收端事先未知的，不能用事先設計的本地擴頻序列產生器產生，需要由恢復的數據獲得。
  8. The spreading code is acquired from the transmission data source. as a result, the method to generate the spread codes is very important. and the method determines the practical application of sess communication system

    自編碼擴頻通信的擴頻序列是從待傳輸的信源數據流中獲得的，因此信源的隨機化技術是自編碼擴頻通信的基礎，它在很大程度上決定了自編碼擴頻通信是否能獲得實際應用。
  9. At 1999, lim nguyen first brought forward a novel self - encoded spread spectrum ( sess ) system, which spread spectrum sequence is full builded by the source data. in sess system, which does not use pn codes. it employs random spreading sequences that are extracted from the information data

    自編碼直擴通信是limnguyen在1999年首次提出的一種利用信源數據產生擴頻序列的隨機直擴技術，它產生具有隨機的、動態可變的擴頻序列，因而是一種較好的安全通信方式。
  10. Traditional spread spectrum communication adopts pseudo - noise ( pn ) codes as spreading codes. however, pn sequence is fixed and periodic, which threatens the transmission security. self - encoded spread spectrum ( sess ) employs random spreading sequences that are extracted from the random information data, abandoning the fixed sequence

    傳統的擴頻通信廣泛採用偽噪聲（ pseudo - noise ， pn ）序列作為擴頻序列， pn序列具有類噪聲特性，但它實際上是確定的周期序列，容易被復制。
  11. That improves the security performance of the conventional sess system and enhances the performance of anti - jamming

    Pn序列的這一特點使通信的安全性受到威脅。
  12. Compare of the difference between stateful session bean and stateless sess ion bean

    對有狀態和會話bean和無狀態的會話bean進行了比較和分別論述。
  13. According to the accounting equation, a firm is assumed to pos ? sess its assets subject to the rights of the creditors and owners

    根據會計等式，一個公司所擁有的資產應該等於債權人和所有者對企業的索取權總值。
  14. Based on the principles of dsss and sess, the mechanism of sess employing the ar filter is illuminated. it transfers the data source to dynamic gauss white noise. then quantizing and optimizing the noise, we can get the final spread sequence

    它動態地把信源序列轉化成高斯白噪聲分佈的數據流，再通過量化、平衡編碼進行序列優化，以得到所需的擴頻碼。
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