次聲引信 的英文怎麼說
中文拼音 [cìshēngyǐnxìn]
次聲引信
英文
subsonic fuse-
Our company are invested by abroad and adopt advanced producing equipment. speciated in umbrella series product. our company with long history of produce umbrella, and with a lot of high level technologist, high material, good quality, and high honour in international market, and got gold prize of mogol in 1994, and a superor company, and trust company
本公司系中外合資企業，由外商投資，引進了國外先進的生產設備，專門生產雨傘系列產品，本公司有著悠久的制傘歷史，並擁有一批高水準的專業技術人員，產品選料考究，做工精細，享有較高聲譽. 94年榮獲蒙古國烏巴托國際金獎.屢次被評為先進企業，重合同信用企業The major job is manufactured a transmitter, which has three upmixer channels. its function is to up convert the signals from c - band to ka - band. the input local oscillator is provided by a low frequency crystal oscillator which has a good performance of phase noise, through 512 times multiply to ka band. this sysetem is used in the laboratory as transmitter source of the fuze, for the multidimensional objects in practise, which lead to the complexity of the reflect signal, so the amplitude, frequency and the phase of the transmit signals both have a key role in dealing with the reflection signals. therefore, this system requires for both the coherence of the single channel ’ s amplitude, phase and multi channels
本文的主要工作是應用戶要求製作一具有三發射通道的上變頻系統，可以將c波段的微波信號上變頻到ka波段的毫米波信號。系統的本振輸入基頻由一相位噪聲非常好的低頻率晶振提供，經過512次的倍頻放大至ka波段。本系統作為實驗室中引信的發射源，由於目標反射信號具有時變的多維性，反射信號變得極為復雜，在信號處理時，不僅信號幅值、頻率有決定意義而且相位關系也很有決定意義。A data acquisition and analysis system of insect acoustic signal ( daasias ) with friendly interface, simple operation and multifunction was developed. it could sample and analyze insect acoustic signals in real time. by daasias both observing insect behavior and analyzing signal could be conducted at the same time
以往昆蟲鳴聲信號是記錄在磁帶上，分析時通過回放磁帶的錄音，在示波器、頻譜儀或聲譜儀等聲學儀器上進行信號分析，結果磁帶的多次回放常會引起信號的失真，並難以對信號作進一步的編輯處理；分析儀器不但價格昂貴、體積較大，而且很難實現昆蟲聲行為觀察與信號分析同步，更不適合野外工作。Secondly, ground on the duct noise control, the delayed - lms algorithm, which is actulized easily, is brought forward, then the simulation on pc is achieved. it is shown from the computer simulation that for the single frequency noise, there will be a good effect when choosing the suitable parameters ; but for the narrowband noise, the effect will become worse with increasement of the bandwidth. this result is helpful to analyze the parameters influencing anc
結果表明： （ 1 ）隨著濾波器長度的增大，系統收斂速度變快； （ 2 ）隨著值的增大，系統的收斂速度增大，但是當值超過某一范圍時會引起系統的發散； （ 3 ）次級通路的延遲數與初級噪聲頻率有關； （ 4 ）對于窄帶信號， dlms演算法可以取得一定的降噪量，但是隨著窄帶信號帶寬的增大，降噪效果明顯變差。( 1 ) crews management on one voyage ( 2 ) cargo handling on one voyage ( 3 ) drill assign and assessment on one voyage ( 4 ) business about inspection and repair on one voyage ( 5 ) maritime affair reports, statement ( 6 ) voyage report ( 7 ) vessel ' s certification management ( 8 ) naviaids, navibooks, charts, communication equipment ( 9 ) life - saving, fire - fighting, anti - pollution equipment management ( 10 ) psc, ism serials documents ( 11 ) others. mean while, this paper discussed some notice of such researching, and point out that we have to face a lot of problem if we bring it into navigation. farther, on the basis of the configuration and functionality of it in shipping, based on the relationship of navigation it and some related navigation technologies, e. g
（ 1 ）航次船員管理（ 2 ）航次貨物管理（ 3 ）航次演習管理（ 4 ）航次檢驗與修理管理（ 5 ）航次事故報告管理、海事聲明、船長聲明（ 6 ）航次報告、財務管理（ 7 ）船舶證書管理（ 8 ）助航儀器、資料、海圖、通信設備管理（ 9 ）救生、消防、防污等設備管理（ 10 ）港口國檢查、 ism系列文件模板（ 11 ）其它在線輔助與應急計算操作平臺文章同時對本論題研究工作應注意的問題作了較為祥盡的闡述，指出當前將it技術引入航海活動，尚需克服不少困難和解決不少問題。The main results of this paper are as fellows f 1 ) illtroducing the ultrasonic technology to the rigid measurement, successful1y exploits the practical small intellectualized ultrasonic device of measuring rigidity by applying mechanical technology, electronic technology and computer science 2 ) reading clearcf displaying more various, applying more information, being easiest to accept by user because of adopting liquid crystal display ( lcd ) 3 ) theorizing the mathematical model between the signal of frequency and the rigid value on the device, possessing very importan practical significance 4 ) optimizing the every parts of the device, achieving the goals of lower wastage of energy, smaller, lighter and inexpensive 5 ) taking the measure to reduce the wastage of energy and adopting reasonable management in power supply for the device, making the device skimp more energy, prolonging the life - span of battery 6 ) utilizing the interface of rs - 232, discussing the communication between the ultrasonic device of measuring rigidity and computef, and also forecasting the foreground of advanced exploitation by user
本文工作的主要成果是： 1 ）將超聲波技術引入零件表面硬度的檢測當中。應用機、電、計算機技術，研製成功較為實用的小型智能超聲波硬度檢測儀2 ）採用lcd （ liquidcrystaldisplay ）液晶顯示，使讀數更清晰、顯示多樣化、信息量多、易於為用戶接受3 ）在理論上建立了該系統的頻率信號與硬度值的數學模型，具有非常重要的實踐意義4 ）對各元器件進行優選，達到低能耗、體積小、重量輕、價格便宜等目的5 ）採取措施降低整個系統的能耗並對系統的供電進行了合理的管理，使其進一步達到低能耗，延長了電池的使用壽命。 6 ）利用rs - 232標準介面，討論了該超聲波智能硬度測量儀與系統機進行通訊以及用戶進行二次開發的前景The development of science and technology journal is limited obviously by its circumstance such as region, contribution, reader, etc. under the influence of these conditions, the confined mind and the unenterprise attitude is produced by editors. thus, the weak link of developing science and technology journal is showed conspicuously in blazing new trails of content, expanding circulation, and founding famous brand. for expanding the developing space of science and technology journal, some effective measures should be adopted. first, the content and quality of journal should be highly valued. the constantly bring forth new ideas in the content should be promoted by publishing original theses, supporting new subject, introducing new direction, creating characteristic column, etc. by means of these methods, the aim of spreading original achievement, starting new fields of scientific research can be achieved. so academic standard and effect of the journal can be improved. second, the operate mechanism of journal as a processing workshop should be changed. the varied methods should be adopted for selling, circulating and information feedback of journal. third, the reputation of the journal should be safeguarded by correcting ideology of publish. the resources of the journal should be rationally used and developed. it can promote the science and technology journal growing continued
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