接收晶體 的英文怎麼說

中文拼音 [jiēshōujīngtǐ]
接收晶體 英文
receiving crystal
  • 接 : Ⅰ動詞1 （靠近;接觸） come into contact with; come close to 2 （連接; 使連接） connect; join; put ...
  • 收 : Ⅰ動詞1 （把攤開的或分散的事物聚集、合攏） put away; take in 2 （收取） collect 3 （收割） harvest...
  • 晶 : Ⅰ形容詞（光亮） brilliant; glittering Ⅱ名詞1. （水晶） quartz; （rock） crystal 2. （晶體） any crystalline substance
  • 體 : 體構詞成分。
  • 接收 : 1 （收受） receive; reception; accept; [電學] receipt; receiving 2 （接管） take over; expropriat...
  • 晶體 : [晶體學] crystal; vitrella; crystal body; crystalloid; x-tal
  1. Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method

    在本設計中，採用高速的dsp處理器，實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法，實現了大電流信號的驅動輸出;採用485總線技術，組建了裝置主機與多探測器之間的主從式通訊網路，實現了多干擾條件下裝置主機與多探測器的可靠通訊;設計了差分式多級選頻放大電路，採用磁感應的方法實現了對空間微弱信號的接收;利用fpga技術，實現了控制器與多外設的介面及數字信號的串並轉換;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元，設計了人機信息交互的介面;採用了模塊化的軟體設計方法，開發了裝置主機及探測器的軟體程序。
  2. 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。
  3. Gps is a planet wireless conductance system which is global and all - weather, gps can offer high precision time orientation information to infinite user, clock precision reachs 10 ? 6 magnitude 。 not only changes traditional time method of quartz crystal clock, but also replaces wireless shortwave and even more lowfrequency signal and tv signal whose overlay range is limited and low precision, offers advantage to geology field task, achieve automatization and high precision of seismic flow observation

    利用gps授時信號全方位、全天候、連續性、實時性和高精度的特點，以gps信號為基準來校準本地時鐘（晶體振蕩時鐘或原子鐘） ，將gps接收機輸出信號的長期穩定度和恆溫晶振的短期穩定度相結合，應用大規模可編程邏輯器件，設計和實現了由pc104控制的實時在線授時系統。
  4. The precise clock source is crystal oscillator made of 74hc04 ; the mute circuit can conceal the error and solve the problem of noise ; the antenna switching circuit in the receiver is to select one antenna from two which receives signal better. it can improve the quality of the receiving audio signal, restrain the noise effectively and promote the system performance

    高精度的時鐘源是由74hc04構成的晶體振蕩器;靜音電路將出錯的音頻信號進行差錯掩蓋，很好地解決了噪聲問題;接收機採用兩副天線切換工作，提高了音頻信號接收質量，有效地抑制干擾，提升了系統的性能。
  5. Experimental results show that the order of fluoride salt being put in and flux type also influences the phases constitution, morphology, distribution and absorbent rate of ti and b. the experiments on remelting master alloys and al or al alloys at a certain temperature range show that the phases constitution and size have a remarkable heredity

    試驗結果表明，不同的氟鹽加入順序和熔劑種類的不同也直接影響著中間合金中化合物的相組成、形態、分佈以及中間合金中ti 、 b的實收率等。在用純鈦顆粒法制備中間合金時，熔煉溫度的改變只能影響tial _ 3晶體的尺寸大小，而無法改變其形態。
  6. The asic chip embedded with bluetooth is usually employed as keyboard mouse equipment controller at present, so that is complicated and expensive to realize. noteworthily a new style of design is developed in the article : a 51 mcu is employed as keyboard mouse equipment controller while controlling bluetooth module as host, which give full play to 51 mcu and make the product at low cost, the design has sure practicability and innovative ; the software of pc end is designed as operating in the backstage, which receives data from usb interface to simulate the function of the keyboard and mouse. the design is easy, the thought is ingenious

    由於目前常見的藍牙鍵盤鼠標設備控制器都是用嵌入藍牙核的asic晶元實現，所以實現復雜而且價格昂貴，而文中設計獨辟蹊徑：用一片51單片機作鍵盤和鼠標的微控制器，兼作控制藍牙模塊的主機，充分發揮了51單片機的性能，實現了低成本設計，具有一定實用性和創新性； pc機端軟體則設計為運行在後臺的應用程序，接收usb介面數據並進行處理，以模擬鍵盤鼠標功能，這一設計簡單易行，思路巧妙。
  7. Regular point images of lcd are projected to the measured surface. the images modulated by the surface are received by binocular vision sensor. a special image processing software is developed to deal with the lcd images

    系統利用液晶投射空間規則編碼點圖案到被測曲面，由雙目傳感器接收經曲面調制的測量圖像，經專用設計的圖像處理軟體，採用粗、細匹配技術精確獲得特徵匹配點，利用視覺技術得到三維數據點陣。
  8. Optical absorption measurements show that mnxcd1 - xin2te4 is a direct energy gap semiconductor and the band gap shifts towards the high energy side with the increase of x

    採用光吸收法測得mn人d n 。 te 。晶體屬于直接帶隙半導體，其能隙eg隨著組分互的增加線性增大。
  9. This paper research the principle of two dimensional collimator system in which the area - array ccd, cpld circuit and dsp chip are used. digital acquisition and processing hardware and software were designed. the test result was given

    本文研究了用cmos作為接收器件，用cpld電路和dsp晶元進行系統流程式控制制和數據處理的二維變形測角儀的系統原理，設計了數據採集、處理的硬體軟體，並進行了實驗。
  10. This paper gives a time - synchronization technique bases on gps time service signal which is used in broad band seismic recorder 。 by world coordination time offered by gps - - utc ( usno ), adjust local clock base on gps signal, gain high nicety clock signal, clock precision reachs 10 - 6 。 this clock is the time source of broad band seismic recorder, bring the whole seismic recorder works in same time base. 1pps time base with high stability can be used as in - phase, spring, time and start - stop of every collection mode, while the scale under second make a precise time mark to receive data of broad band seismic recorder

    針對接收機中gps信號的噪聲進行kalman濾波軟體處理， kalman濾波可以對gps信號與本地晶振時鐘的時差數據在大噪聲中進行平滑，在較短時間內估計出高精度的時差數據。系統消除了gps秒脈沖信號的ms級隨機誤差，把晶振秒脈沖的長期穩定度鎖定到gps信號的穩定度上;在gps信號失效時給出了可行措施，能夠保證在任何情況下產生一個穩定、高精度秒脈沖信號，誤差在1 s內。
  11. The control system includes two modules, one named the input module which acquires data digitally, and the other, named the output module, controls the emission of the laser, the gating function of the single photon counting module ( spcm ) and the synchronization of the input and output modules. each of them uses a complex programmable logic device ( cpld ) as the core component, and is devided into three parts : the hardware circuit, the programming logic circuit and the software

    該控制系統主要包括控制單光子發射、單光子探測器、數據採集接收系統的輸出系統和數據採集系統兩個模塊，它們都採用復雜可編程邏輯器件cpld作為核心功能晶元，由硬體電路設計、晶元編程和高級軟體編程三部分組成。
  12. The focus is about the char device driver design used in the dvb receiving card and the drive development process in user space ; analyzing the dvb receiving system working principle and process under linux and providing a method to load the linux dvb receive card device drive into the linux kernel ; analyzing and implementing the firmware design of saa7146 chipset working with linux kernel and working characteristic in vrious working mode ; analyzing and implementing the frontend drive programing of the digital tv receive system ; realized the qam demodulation and the mpeg stream filter, so that the output stream can be used to playing on pc better. and this article designs an event management mechanism based on the mhp, which improve the linux dvb software system

    重點研究了數字電視接收卡的字元設備驅動問題，闡述了用戶空間開發驅動程序的過程;分析了linux下數字電視接收系統的工作原理和驅動程序開發過程，給出了linuxdvbapi接收卡設備驅動程序加載到linux內核中的方法;研究實現了saa7146晶元配合linux內核共同工作的固件設計和不同工作模式下的工作特性;研究實現了dvb接收系統中前端驅動程序的編寫;設計實現了qam解調和mpeg流解復用，使輸出傳輸流較好地用於pc播放;同時，本文所設計的一種符合mhp規范的中間件事件管理機制，優化了linuxdvb軟體系統。
  13. The author designs the commonly used hardware platform of if digital receiver in software radio, and companying with the schematic circuit plot analyses the working principle of hardware system, moreover, explains the properties and usages of some important digital processors

    作者設計了軟體無線電中頻數字化接收機通用硬體平臺，結合原理圖對硬體工作的機理進行了全面的分析，並對一些重要的數字晶元的特性和使用作了說明。
  14. In the design of hardware, frequency sweep signal is based on dds + pll. by the control the singlechip c8051f060, ad9852, the dds chip, can achieve stepped frequency signal. with amplifying and detector circuits, the instrument can achieve the measurement and receiving of amplitude frequency characteristic result. by means of pdiusbd12 finish the usb1. 1 protocol conversion, communicate with usb interface of pc, the instrument give the measurement resul of amplitude - frequency characteristic in lcd of pc

    硬體方面，掃頻信號源基於dds + pll的技術，由c8051f060單片機控制dds晶元ad9852實現頻率步進。再加上外圍放大、檢波等電路，測量和接收幅頻特性。並藉助于pdiusbd12完成測量數據usb1 . 1協議轉換，實現與pc機的usb介面通信，將幅頻特性測量結果在pc機的液晶顯示屏上表達出來。
  15. In the part of platform designing, proper peripheral chips are chosen according to the audio signal format. and how to achieve channel synchronization in the receiving part is an important aspect of wireless transmission system. in order to solve this problem, three algorithms are used ; those are scramble / descramble, improved over - sampling, and frame synchronization protocol

    在硬體驗證平臺的設計部分，文章根據音頻信號的特點選擇了適當的外圍晶元，並且針對無線傳輸接收端的同步問題，採用了三種演算法來減少失步現象，即擾碼/解擾演算法，改進型的過采樣演算法，以及幀同步協議。
  16. Then the paper dicusses the implemention of the modem based on dsp, describes the parts of the modem, design and implement the circuit of the modem ' s echo cancek ring detection -, status supervise and power supply after the detailed research on the dsp ' s performance ? function, memory space and work mode. studies the device driver of the ppsm, develops the modem ' s driver, includes the idma read and write, download page, event handle, send data and receive data

    隨后，論文論述基於dsp的modem的設計，對modem的總體結構進行了描述，在對系統使用的dsp晶元adsp2187的性能、功用、存儲器空間和工作模式作了細致研究后，設計和實現了modem的回聲抑制、振鈴檢測、狀態監測和電源等硬體電路，並對ppsm操作系統下外設的驅動程序進行了研究，開發了ppsm下modem的驅動程序，包括idma讀寫、下載頁面、事件處理、發送和接收數據的程序。
  17. Implemented in the present deep sub - micron ms / rf ( mixed signal, radio frequency ) cmos, this monolithically oeic takes advantage of several new features to improve the performance of the photo - diode and eventually the whole oeic

    這種單片集成接收機採用了先進的深亞微米ms / rf （混合信號射頻） cmos工藝，利用這種新型工藝提供的新技術對原有光電二極體進行了改進，使其部分性能顯著改善，並對整個光電集成晶元性能的提高有所幫助。
  18. The third chapter analyzes the process of translating the system performance to the system architecture based on the hierarchy design flow, and then, presents the method and the result of the system partition from different views such as : the oppositely absolute processing modules, convergent controllability, the simple and similar interfaces

    第三章，基於層次化的結構設計流程，對本通道接收晶元從系統性能的定型到晶元總體結構的實現進行分析，提出了系統劃分的方法及其結果，劃分后的系統結構具有各個模塊數據的處理相互比較獨立、便於集中控制以及各個模塊間介面簡單且相似等特點。
  19. Afterwards the emphasis is placed on the analysis of demodulation of qpsk which is the modulation form of dvb - s

    第三章論述了dvb數字衛星接收晶元解調模塊的具體演算法實現。
  20. Chapter 2 discusses the modulation and demodulation theory and the principle of pll ( phase locked loop ) from the general communication theory to several modern modulation techniques

    從通信傳輸的一般原理到幾種具體的現代調制技術，並針對dvb - s接收晶元簡要敘述了qpsk的解調原理。
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