直線通信 的英文怎麼說
中文拼音 [zhíxiàntōngxìn]
直線通信
英文
line communication-
Binary linear ( vertical and horizontal ) polarization is used by all chinese communication satellites, and binary circular ( right - hand and left - hand ) polarization is often used by some intelsat and some russian satellites in c - band
中國通信衛星都採用由垂直極化和水平極化構成的雙線極化頻率復用方式，國際衛星組織和俄羅斯的一些c頻段衛星則採用由左旋極化和右旋極化構成的雙圓極化頻率復用方式。Finally, with the optimized chaos sequences, the results of software simulation on vhf - rc indicates that ds - ss outbalances the bpsk system without spread spectrum due to ber and the ds - ss with kent sequence is better than the one with golden sequence in some extend
最後本文對數字混沌序列進行了優選，在超短波中繼通道模型上的模擬結果表明混沌直擴通信相比于非擴頻的bpsk通信在誤碼率方面明顯較低；相對于線性擴頻碼（ gold序列） ，同樣誤碼率較低。A new fractal - based infrared image feature extraction method is presented and the detailed theoretic analysis and implement procedure of this algorithm is submitted and tested in some experiments. with the limitation of the line detection based on traditional hough transform that the information of the length and the end points of the line is unavailable, a new algorithm which makes use of the accessional strategy based on precognition information is put forward to meet the demand for more information of the line, simulation results show this method is effective. finally, the whole process of airport target recognition is presented and the result images are also given
使用分形方法提取目標的特徵，在知識指導下，提出了一種基於目標特徵模型的降維的形態學分形維數計算方法，對傳統分形方法進行了改進，從理論上推證了演算法的合理性，並對演算法進行了模擬分析；針對傳統hough變換無法獲得線段端點和長度信息的局限性，提出了一種基於目標特徵先驗知識的hough變換融合策略，通過引入目標先驗知識，可以有效地獲得直線信息；對信息多而復雜的機場目標採用基於知識的目標識別方法，使用置信度模摘要型實現不確定推理，對目標進行識別判斷，將知識貫穿于整個識別過程中，對目標進行了有效地識別。In recent years, the worldwide researchers pay much attention to fourier telescopy. it is an active imaging technique that encodes the information in the temporal instead of spatial domain, then receives the speckle and deposed of it to reconstruction the object image. now, the high - resolution technique is under the condition of deeply researched
它是一種主動式干涉成像技術，這一技術通過時域內的相位的調制完成直線條紋對目標的掃描，從而達到對深空目標頻譜的抽樣，然後接收其散射回波，對回波信號進行處理，進而還原出目標的像。On the aspect of test principle, the author abandoned the principle of " off - line analysis of communication record data ", adapted the principle of " direct dialog of tester and testee ". with this approach, the system has the advantages of easy to realize and having accurate testing result
在測試原理上，摒棄了已往「記錄通信雙方會話數據做離線分析」的測試原理，採用了「測試機與被測機直接對話」的測試原理，具有易如實現、測試結果精確等優點。According to the theoretical parameters and analysis of clustering identification of noises, and based on the theory of spread frequency communication and bpsk, the remote reading meter system through medium - voltage power line is realized
根據理論參數及噪聲分類識別分析，以直接序列擴頻通信為理論基礎，採用bpsk調制解調，設計了基於中壓電力線的遠程抄表系統。Because of the limited power supply, limited ability of communications, limited computability and memory on the mote, it is always a research emphasis to design a more efficient and power saving protocol for wireless data transmission
由於傳感器節點具有電源能量有限、通信能力有限、計算和存儲能力有限的特點，因此設計更加高效和省電的無線傳輸協議一直是這一領域研究的重點。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。Along with the development of computer network technology, it becomes an important program how to use gis ( geographic information system ) to internet / intranet, that - is webgis. webgis implements query online and job process with gis based information publication, data share and intercommunion in internet and makes enterprise users access gis data by web viewer directly, create thematic map and analyze gis data. webgis changes gis technology ' s structure from c / s to b / s
Webgis是指在internet的信息發布、數據共享、交流協作基礎之上實現gis的在線查詢和業務處理等功能，使企業用戶能直接通過web瀏覽器對gis數據進行訪問，實現空間數據和業務數據的檢索查詢、專題圖輸出、編輯修改等gis功能，完成了gis技術從c s模式向b s模式的轉變。The function of the software use pc - computer to dispose the output signal which is produced by the device as following steps : ( 1 ) to input data by parallel interface ( 2 ) to record and form a file ( 3 ) to demonstrate results step by step ( 4 ) the results could be compiled ( 5 ) it can synthesis in the permitted error scope, substituted original dot for line or arc, finally we could get a graph that is described by some simply curve. ( 6 ) to convert these graph into a program, which used in the cutting process of numerical control. ( 7 ) the software also includes some protective methods
而系統處理軟體的作用是：利用pc兼容機，將上述裝置的輸出信號（ 1 ）通過并行口輸入（ 2 ）記錄成文件（ 3 ）逐點顯示出來（ 4 ）可人工進行化簡，編輯（刪、改點）等（ 5 ）可在給定誤差范圍內進行人工擬合，用直線和圓弧取代原來的點，得到一個與原圖形的誤差在規定范圍內，又消除跟蹤過程中因受到各種干擾而造成的缺陷，由盡可能少而簡捷的數學曲線描述的圖形（ 6 ）把這些圖形轉化成用於編制數控線切割加工程序及autocad能夠識別的文件（主要指dxf格式） （ 7 ）該軟體還有一定的加密措施。In other way, the telephone line expander which has many characteristics just as the little of declination, the far distance of communication, the convenience of using and protecting can transmit tone signal directly and is suitable for the performance of telephone line
同時，電話線路擴容器直接傳輸音頻信號，適合電話線路特性，具備衰耗及串音小，通話質量好和通信距離遠，使用及維護簡便等優點，具有廣泛的應用前景和使用價值。With the development of the fiber communication, very high speed fiber optic backbone has being closed to the customer, but few customers has connected to fiber backbone directly. on the other hand, many customers are running some high speed network within their lan, such as fast ethernet ( 100mbps ), or gigabit ethernet ( 1. 0gbps )
隨著光纖通信技術的發展， 2 . 5g - 10gbps的光纖干線正在不斷的向用戶延伸，但由於成本和光纖敷設工程上的難道，只有很少的用戶直接和光纖干線相連，通常光纖只延伸到了路邊、小區；另一方面，許多用戶內部的局域網也具有很高的傳輸速率，一般為100mbps甚至1gbps的以太網。Take bus 44m and alight at tsing yi police station. turn into chung mei road and reach the entrance of sheung ko tan street. after walking along the steps ( beside lutheran village s name plaque ) to fung shue wo road, you will see the chun kwan temple ( next to tsing yi rural committee )
交通：巴士44m于青衣警署下車，步行往涌美路到上高灘街街口直入，于信義村村牌處沿旁邊的樓梯到楓樹窩路，便可見到真君廟（青衣鄉事會辦事處側） ，亦可於葵芳地鐵站乘搭專線小巴88d號直達真君廟。Secondly, this paper analyses data - delivering method, data - transmitting format and fault - control technology, studies and picks out direct sequence spread spectrum, accessing point network topology and the ieee802. 11b network rule, on the basis of which the harbor wireless communication system model is established. each composing part of the system ' s model is given out. the choice of hardware equipments and the design of communication software are expounded
其次，本文對通信技術中的數據傳送方式、數據傳輸形式和差錯控制技術進行了分析，研究了港口無線通信系統中的傳輸方式、拓撲結構和網路標準等關鍵技術，選取直序擴頻傳輸方式、接入型拓撲結構和ieee802 . 11b網路標準作為港口無線通信系統的技術基礎，建立了港口無線通信系統模型，闡述了該模型的實現方法，包括硬體設備選擇和通信軟體設計。Through the research in this paper, we can create the connection between the domestic instrument and p - net fieldbus step by step
通過本課題的研究，將逐步實現國產二次儀表具備直接與p - net總線通信的能力。An in - building power line data communication system is built using dsss and qpsk technology and its important parameters are presented
使用直接序列擴頻及qpsk等通信技術構建了室內電力線通信系統，給出了主要的技術指標。In wireless communication, increasing bandwidth efficiency to transfer more data in the band - limited channel always is a task deserve for attention
無線通信中，提高帶寬效率，在有限的通道帶寬中傳輸更多的數據一直是個令人關注的問題。The communication technology of electric automatic system is discussed. it principally studies the technology of organizing nets, the communication technology of low pressure electric line and the technology of spread spectrum communication. it gives the project that power line carrier and direct sequence spread spectrum communication are combined with automatic dial - up passing modems for daqing automatic reading meter system
探討了電力自動抄表系統的通信技術，重點研究了組網技術，低壓電力線通信技術，擴頻通信技術，提出了在大慶電力自動抄表系統中利用公眾電話網通過數據機自動撥號、電力載波和無線直接序列擴頻通信相結合的數據傳輸方案。Single chip computer system that on - line monitoring of dc - insulation based on control area network
總線通信的直流絕緣在線監測單片機系統Multicarrier wireless communications have been widely investigated in the past decades. recently, two - dimensional spread spectrum ( 2d - ss ) system has drawn a lot of attention because of its full utilization of spreading characteristics in the frequency domain and time domain. compared with multicarrier code division multiplex access ( mc - cdma ), 2d - ss system can effectively mitigate multiple access interference ( mai ) due to spreading in the time domain
當前多載波無線通信技術得到了廣泛的研究，二維擴頻通信系統是近年來提出的新的擴頻通信方式，由於二維擴頻系統從時域和頻域上分別對數據信號進行頻譜擴展，因此它同時具有時域擴頻和頻率擴頻通信系統的特點，是對傳統的一維時域直接序列擴頻和多載波擴頻的推廣。分享友人