first-level code 中文意思是什麼
first-level code
解釋
五階碼-
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。 -
Levels of different password protection systems ; the first level is company identification code. in order to keep the uniqueness for protection locks purchased by each company, mcamos technology provides each customer with an exclusive id, which is a unique and unrepeatable number
層不同的密碼保護機制第一層為公司辨認碼，為使每個公司所購買的保護鎖具有唯一性，先趨科技提供每一家客戶一個專屬的辨識碼，該辨識碼為唯一且不重復號碼。 -
A process by which a receiving data device determines the speed, code level, and stop bits of incoming data by examining the first character ? usually a preselected sign - on character ( often a carriage return )
這一檢測過程是一個接收數據設備通過檢驗第一個字元（通常是一個預定的字元，比如回車）來決定速度、代碼等級，輸入數據結束位。 -
2. in the outline code field, click the first row, and then type a first - level outline code
2 。單擊「大綱代碼」域中的第一行，然後鍵入第一級大綱代碼。 -
The following code example creates a view that shows all the products where the number of units in stock is less than or equal to the reorder level, sorted first by supplier id and then by product name
以下代碼示例創建一個視圖，該視圖顯示所有庫存量小於或等於再訂購量的產品，這些產品首先按供應商id排序，然後按產品名稱排序。 -
4. in the length field, click the first row, and then type or select a number for the maximum number of characters in the first - level code string
4 。單擊「長度」域中的第一行，然後鍵入或選擇第一級代碼串中的最大字元數。 -
This paper first research on main technologies used by avs standard, which include prediction, transform, quantization, in - loop filter, and entropy encoding, and then focus on the 2d - vlc entropy coder of avs, which is context - based adaptive coder. this encoder operates on run - level pair, and it uses the type of current block and value of current coefficients to switch vlc code - table. these tables are designed according to the distribution of transformed coefficients, and this way is much better than using only one table to code all residual coefficients in one 8x8 block
本文首先詳細研究了avs標準的核心技術，包括預測編碼、變換量化、環路濾波器以及掃描和熵編碼等，之後重點研究了avs標準中使用的基於上下文的2d - vlc變長編碼方法，這種方法編碼的是（ run ， level ）數對，同時根據當前編碼塊的類型和殘差系數這兩種上下文信息來切換碼表，這些碼表是預先根據變換系數在不同位置的分佈信息設計好的，這樣要比只使用一個變長碼表來編碼塊內所有位置上的殘差系數的壓縮效果要好得多。 -
It includes three steps : first, the experimental data in exfor format is evaluated. then, the optical potential parameters are got by using the code apom94, and the direct inelastic discrete energy level reaction cross sections and angular distribution of every isotopes are got by using the code dppm. thus the ultimate commended data, which coincide with each other, can be obtained by using code nunf
其具體過程是先對exfor實驗數據進行評價，給出實驗數據評價值，然後，利用程序apom94計算光學位，利用dppm程序計算直接非彈分立能級反應截面和角分佈，在此基礎上，利用nunf理論計算程序獲得各同位素本身數據以及各同位素與天然元素數據自洽的最終推薦值。
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