輔助字元 的英文怎麼說
中文拼音 [fǔzhùzìyuán]
輔助字元
英文
special-character-
This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller
本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。The mathematic model of antenna is used in digital tv system network layout and simulation. the disquisition educes the mathematic model of omnidirectional multilayer tv antenna
摘要這里利用電磁場理論和計算機輔助分析的方法導出電視工程常用的全向多層振元電視系列天線的數學模型，並應用於地面數字電視的單頻網組網實踐。We can apply these digital tenor models to solve problems confronted during deposit exploration. those models can help study shape, scale and distribution of different ore bodies in the deposit area, reveal the relationship between tectonics of the deposit area and copper deposit realization, they can also offer some information for deposit exploration and laneway digging
應用數字品位模型（ dtm ）可以形象直觀地反映礦區銅元素分佈規律及不同礦體的產狀、規模；展示礦區構造與銅元素礦化的關系；可以為礦山開采和巷道開拓提供重要的參考資料；還可以由已知推未知，為礦區外圍找礦提供輔助性信息。International conference on computertechnologies and applications, iccta 99, august 1999, alexandria, egypt. 11 farah n, souici l, sari t, sellami m. knowledge based artificialneural network for arabic city name recognition
大部分阿拉伯字母含有輔助部分，這些輔助部分可能位於字母主體部分的上面下面或者位於字母內部輔助部分是為區分主體部分相同的字元而存在的。Based on the analysis, we bring up a new way of thinking, after considering the characteristics of the dds design in software radio system platform. we adopt the rom compression technique of dds special chip and other optimizing methods in the design. we still bring up a new modified method, of which the compression ratio is 139. 6 : 1
在此理論分析基礎上，針對在軟體無線電平臺中的直接數字頻率合成設計特點，對dds專用晶元進行分析后提出新思路，將dds專用晶元中所使用的幅度表壓縮技術用於軟體無線電平臺中的dds設計，同時採用其它輔助方法進行了優化設計，並提出一種新的改進方法，將壓縮比提高到139 . 6 ： 1 ，很好的改進了軟體無線電平臺中直接數字頻率合成的雜散抑制性能。We design inversion control circuit with cmos figure pll cd4046 act as core and microprocessor 80c196kc act as assistant controller. adopting a control method that combine fuzzy controller and pll control, improve induction heating power succeed in startup. adopting electric current voltage pair closed loop feedback design, with trough route capacitance voltage and trough route electric current act as pair closed loop feedback signal, guarantee induction heating power output accuracy
並對系統主電路的元器件參數進行了詳細的計算；設計了以cmos數字鎖相環cd4046為核心、以80c196kc作為輔助控制器的逆變控制電路；採用了模糊邏輯與鎖相環相結合的控制技術，提高了電源的啟動成功率；採用電流、電壓雙閉環反饋方案，採用槽路電容電壓和槽路電流作為反饋信號，從而保證了電源功率的輸出精度。Is passed by reference, the marshaler copies the contents the string to a secondary buffer before making the call
時，封送拆收器在進行調用之前將字元串的內容復制到輔助緩沖區。Class contains static members to assist in manipulating absolute and relative path strings, whereas the
類包含能輔助操作絕對和相對路徑字元串的靜態成員，而Through analyzing the results, we expatiate the feasibility of using dsp to implement digital signature. in hardware design, tms320c50 chip is chosen as the core processor and electrical periphery circuit is designed on basis of it. the function and connection information of digital signature electric circle is presented in detail in this report. at last, the validation software of signature is accomplished in computer. we run the whole system to get the result of digital signature and its validation, thus verify the correctness of the signature and the validity in identifying attack
本次設計在硬體上採用的核心處理晶元為tms320c50 ，在熟悉此晶元的內部結構的基礎上，設計了處理器晶元的外圍功能模塊輔助電路，製作了簽名電路板和硬體介面板，本文具體給出了數字簽名電路板和介面電路板各部分電路塊的功能和接線情況。最後，在計算機中編寫了簽名驗證軟體，並給出運行整個系統得到的對數據「簽名」和對「簽名驗證」的結果，對數字簽名結果的正確性和識別攻擊的有效性進行了驗證。分享友人