首樣測 的英文怎麼說
中文拼音 [shǒuyàngcè]
首樣測
英文
process data report-
Due to existing signal processing technology ’ s shortage such aslow measurement, narrow measurement range precision and other poor performance, we introduced a high - precise signal processing technology : firstly, to get power spectrum with hanning windowed welch modified periodogram, search its peak value frequency ; secondly, to apply zooming analysis via goertzel algorithm ; at last, to get a highly precise doppler frequency with energy centrobaric rectifying algorithm 。 the simulating result indicated that this technology introduced could get accurate doppler frequency 。 depending on above discussed technology, we designed a signal processing scheme, and developed a signal processing system. the running result showed high performance, verified the feasibility and reliability of the highly precise signal processing technology introduced. in a word, the technology improved ldv ’ s performance such as measurement precision, measurement range, dynamic response time 。 and it will have a wide application foreground
針對存在的缺點，本文提出了一種應用於激光多普勒測速的高精度信號處理技術，即首先利用加hanning窗的welch修正周期圖演算法得到信號功率譜，搜索其譜峰值頻率，接著利用goertzel頻譜細化演算法對搜索的譜峰進行細化分析，再引入能量重心頻譜校正演算法對細化后的譜峰進行校正分析，從而將離散頻譜分析演算法、頻譜細化演算法和頻譜校正演算法三者有機結合起來，充分發揮各自的優點:通過加hanning窗的welch修正周期圖演算法快速得到功率譜及峰值頻率，通過goertzel演算法獲得分析頻帶的高解析度頻譜，然後通過能量重心校正演算法對細化后的頻譜進行高精度校正，這樣不僅保證了演算法的高效性，而且大大提高了分析的精度。Fundamental of laser 40ar / 39ar dating method : our laboratory has successfully set up the laser microprobe 40ar / 39ar geological dating method. our works include adjustment of the high - gain electron multiplier in mass spectrometer and correction of mass discrimination, adjustment of the laser, test for absorption ability of minerals to laser, designing and manufacturing high - vacuum sample chamber, sample preparation and irradiation, research on the variability of j values on the surface of rock chips, measuring atmospheric argon, determination and correction of blanks and ages, etc. the laser microprobe technique is particularly effective for some geological samples. it can be used, for example, for research of distribution of the components in extremely small samples that are very difficult to be separated and purified and those which contain excess argon
本文首先從常規~ （ 40 ） ar ~ （ 39 ） ar階段升溫定年實驗室的改進入手，進而建立了激光~ （ 40 ） ar ~ （ 39 ） ar定年實驗室，利用這兩種先進同位素地質定年方法，結合其他手段，對青藏高原腹地和北緣的阿爾金斷裂系多期地質事件進行了詳細的同位素年代學研究：一、參照國際先進實驗室的流程，對我們的常規~ （ 40 ） ar ~ （ 39 ） ar階段升溫實驗室在樣品的預處理、樣品的照射條件和系統空白測量及校正等方面進行了改進，使之產出的同位素年代數據更可靠並為國際同行所承認。It makes sampling data regularized by means of man - machine interactive mode and procedure method, respectively. the driven data of the cutter guide is generated, which is based on sampling data processed. it proposes an intelligent data reduction algorithm which bases on the combination of straightness of curves, equidistance and distance deviation principle
首先採集並分析了內輪廓數據，分別運用程序處理方式和人機交互方式實現采樣數據點的規則化處理;根據處理后的測點數據生成磨頭驅動數據;並提出了一種基於曲線曲率、等距及距離偏差帶的自適應數據壓縮方法。Results of laboratory tests on blood samples from kampala and kamwenge performed by the centers for disease control and prevention ( cdc ), atlanta, usa have confirmed marburg virus infection in the putative index case, a mine worker, and in one of his close contacts during his illness
美國亞特蘭大疾病控制與預防中心對烏干達坎帕拉居民與卡穆文奇居民的血樣進行了檢測，實驗檢測結果證實了所推斷的首個病例感染了馬爾堡病毒：一個礦工與他治療期接觸過的一個人。In this way, the self - similar multi - fractal property of the hadronic system produced in z0 ( ) decay is strictly confirmed and the corresponding fractal dimensions and levy index are obtained in the first time using the high statistics data from the l3 experiment at lep
這樣就精確地驗證了在z ~ o衰變能量下的e ~ + e ~ -對撞末態強子系統是多重自相似分形，並首次用實驗測出了相應的分形維數與l vy指數。This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions
首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。In the last part of this thesis, we introduce the component and function of test system, and focus on how to develop the test system in details, include up layer application and device driver, from analyzing to coding. we explain how to develop the gui of test system using photon application builder ( phab ) tools, communicate among processes and schedule the multi - tasks. we also introduce the development of device driver under qnx, include programme of the interrupt handler, management of hardware resource and interface between application and device driver
首先，以真實的圖形界面為基礎，詳細介紹了測試軟體界面部分的樣式、功能和使用；在此基礎上，進一步介紹了測試軟體編寫中的一些技術細節，如如何使用phab開發圖形界面、如何進行多任務調度、如何進行進程通訊等；最後詳細地介紹了在qnx下驅動程序的開發包括中斷處理函數的編寫、系統硬體資源的管理以及驅動程序與測試程序的介面。The model - based parameter estimation ( mbpe ) is firstly applied to the near - field measurement in this thesis to deal with the near - field sampling data in space and spectrum domains respectively
本文首次在天線近場測量中採用了基於模型的參數估計技術，在空域和頻域內分別對近場采樣的數據進行處理。The paper fristly compared the fertile soil with the incinerated sterile soil on the number of micro - algae, soil ph value, soil organic matter soil available phosphorus and soil nitrogen. and then, the author put fertile soil, which included micro - algae, proportionally into sterile samples and cultivated them respectively under illumination condition ( micro - algae can live and reproduce ) and dark condition ( micro - algae will die in some time ). the above indices were measured in 0, 30, 60 and 90days respectively, the analyse of the interrelation between the change of micro - algae ' s number and the changes of soil ph value, soil organic matter, soil available phosphorus and soil nitrogen indicated : ( l ) soil micro - algae which were native to fertile soil conld adapt to the changed circumstance and light acted as a decisive role to the distribution of soil micro - algae. under dark condition, the micro - algae ' s number declined gradually and went to zero in the end, while under illumination condition, on the 90th day, the micro - algae ' s number of per gramme was 6 - 7 times more than that of the beginning
本文首先對肥沃土壤與經高溫焚燒后的貧瘠土壤中的微藻數量、土壤ph值、有機質含量、有效磷含量和全氮量進行比較研究，然後將包含微藻的綠化苗圃地肥土按不同比例接種進入貧瘠土樣中，分別在光照條件和黑暗條件下進行培養，在0天、 30天、 60天和90天分別檢測以上指標，比較有光條件和無光條件下，即有藻條件和無藻條件下貧瘠土樣所發生的變化，並分別對微藻數量的變化與土壤ph值、有機質含量、有效磷含量和全氮量的變化之間做相關性分析，以評估肥沃土壤中的微藻接種進入貧瘠土壤后的生長情況以及對貧瘠土壤的改良作用。研究結果表明： （ 1 ）土壤微藻對環境有較強的適應能力，且光照對其分佈起了決定性的作用。Firstly, in order to deal with the problem that the accuracy of the demarcating concentration calibrate algorithm can ’ t satisfy the requirement, this thesis proposes a new demarcating concentration calibrate based on fitting a curve. the new algorithm uses least square method to keep the accuracy. the measuring results show that the accuracy of the algorithm is higher and it can satisfies the requirement of application
首先，本文針對生化分析系統中現存的濃度標定演算法不精確，難以滿足實際需要的問題，提出了一種基於曲線擬合的濃度標定演算法，演算法基於最小二乘原理進行曲線擬合以保持測量精度，實際樣本測量表明該演算法具有較好的測量精度，能滿足應用要求。This paper, on the basis of yuelu - mountain high - tech park in changsha city, beginning with the investigation of diversiform transit - trip in the park, firstly analyzes and evaluates space - time change law of traffic flow and situation of traffic service level on actual road net - work in the park ; secondly, applying multi - statistical analysis method, taking investigated corporation as sample, using annual freight traffic volume produced by unit plant area of the corporation, with clustering analysis, obtains four sorts of the sample corporation, and establishes the predict models of freight traffic volume for every kind of corporation. with these models, actual or planning year ’ s day maximum freight traffic volume can be predicted. the third, this paper makes analysis research of trip law of employees in the park, and obtains the index of trip times, trip modes and trip development trend of the employees
本文以長沙市嶽麓山高科技園區為依託，從調查園區內的各類交通出行開始，首先分析評價了園區內現狀道路網上的交通流時空變化規律及道路網上的交通服務水平狀況;其次是應用多元統計分析方法，以調查企業為樣品，以企業單位車間面積所產生的年貨運交通量為變量，通過聚類分析，獲得了樣本企業的四個類別，並建立了各類企業貨運交通量的預測模型，應用這些模型，可預測園區內現狀或規劃年的日最大貨運交通量;第三是對園區內企業員工的出行規律做了分析研究，獲得了企業員工的出行次數、出行方式及出行發展趨勢等等特性指標;最後是對園區內小區居民的出行狀況進行了分析，獲得了居民出行的諸如高峰時段、高峰出行量等等的特徵數據。And it investigates the appearance condition ( including joint, crack, eroding, corrosion, braking pole device rupture, crane - girder ' s gnawing railway and so on ) of the whole crane - girder system on the spot, at the same time, it also actually examines the stress of the beam, chemical ingredient, distortion and railway excursion, etc. through sampling, and based on the actually examined results, it checks and calculates the carrying capacity of crane - girder system. then, based on the investigating on the spot and the calculated result, it discusses the mechanism of fatigue failure of the upper part of welded steel crane - girder, analyses the reason of steel crane - girder in the high - frequency emerging the fatigue crack, institutes the strengthened method of damaged steel crane - girder of accurate packing up workshop of the primary mill plant. finally, it presents some advice and suggestions for the repairing and strengthening method of fatigue crack of upper part of steel crane - girder in the high - frequency
針對包鋼初軋廠精整車間鋼吊車樑上部區域出現裂縫這一問題，本文首先綜述了國內外關于焊接鋼吊車樑上部區域疲勞裂縫的研究現狀；其次對整個吊車梁系統的外觀情況（包括連接、裂縫、腐蝕、銹蝕、制動桿件斷裂、吊車啃軌等）進行了現場調查，抽樣實測了梁的應力、化學成分、變形及軌道偏移等，根據實測結果，對吊車梁系統的承載能力進行了驗算；然後，根據現場調查及計算結果，探討了焊接鋼吊車樑上部區域疲勞破壞的機理，分析了重級工作制鋼吊車梁出現疲勞裂縫的原因，制定了初軋廠精整車間破損鋼吊車梁的加固方案；最後就重級工作制鋼吊車樑上部區域出現疲勞裂縫的修復與加固方案提出了一些意見和建議。First, the harmonic analysis method based on fft is discussed, and some practical issues in the application of fft are investigated. the factors which affect the calculation precision of harmonics, such as sampling and weighting of window function, are analyzed, and then the instructive conclusions for designing voltage monitor are obtained
首先闡述了基於fft的諧波分析方法，對fft實際應用中的問題進行了研究，通過實際算例探討了采樣方法、窗函數加權等影響諧波計算精度的因素，得到了對電壓質量監測儀的設計具有指導意義的結論。On the basis of this theory, the applications of the sdr structure of wideband and bandpass sampling in if ( intermediate frequency ) in flight test were offered : increase the sampling in if ( intermediate frequency ) in flight test were offered : increase the capacity of the transmitter and the terminal receiver channels without changing the apparatus of original system and on the conditions of obeying the standard remote sensing
首先對軟體無線電的組成結構和飛行測試中實際使用的通道進行了闡述，在此基礎上提出了基於寬帶中頻帶通采樣軟體無線電結構在飛行遙測測試中的應用，在不改變原系統設備的情況下，在遵守遙測標準的前提下，提出增加機載發射機和接收機通道容量的設計方案。The basic idea of this method is to produce particles from the posterior densities, and these weighted samples provide approximations to the densities. in this dissertation, sequential monte carlo method and its applications in communication are investigated. firstly, its basic idea, method and improved method are introduced, then induce the bound of particles, which determines the performance of the system, and the more particles are chosen, the higher computation is done, finally, a new detector based on new importance function is proposed, which deals with the joint channel estimation and detection in flat fading channels
首先介紹了它的基本思想、基本方法、及當前研究現狀；在此基礎上推導出樣本數選擇的界，樣本數的選擇決定了系統的性能，但是若選的太多，計算復雜度也會隨之增大，因而給出這個界是十分有意義的；最後提出了一種基於新的重要函數的檢測器用來解決平坦衰落通道下的聯合通道估計和檢測問題，並通過模擬證明了我們提出的新檢測器的有效性。It ' s a more accurate method in determining the isotopic abundance of uranium. the paper describes the measurement principles that allow accurate measurements to be taken on samples of arbitrary size, shape, and measurement geometry - and of arbitrary physical and chemical composition - through the use of know nuclear decay data ( half - lives and branching intensities ). this method relies on internal gamma - ray peaks from the spectrum under analysis to self - calibrate the unknown spectrum for energy and peak shape
本工作首次分析了pc fram軟體的演算法並使用高純鍺探測器探測歐共體低濃鈾標準樣品，使用pc fram軟體的預設參數並不能得到準確的富集度值，通過大量的實驗，本工作對鈾富集度測量中的關鍵問題進行了初步的研究並給出了本實驗室條件下準確分析鈾富集度的修正參數和條件。Clustering figure shows that, along the route groundwater seepage, the melt water first recharges groundwater of nuoertu, then that of gurinai and guaizi lake ; the long clustering distances of groundwater samples of gurinai and guaizi lake perhaps result from infiltration of the heihe river ; it ' s impossible that water of heihe river recharges underwater of the badain jaran desert represented by nuoertu
由聚類圖推測：祁連山冰川融水通過地下首先經過諾爾圖，然後到達古日乃和拐子湖；古日乃和拐子湖地下水某些樣品聚合距離大，可能是由黑河水滲入引起的，少量黑河水可通過古日乃滲入拐子湖引起地下水成分變化；沒有跡象顯示黑河水補給巴丹吉林沙漠（以諾爾圖為代表）地下水。This demonstrates the feasibility of using grazing emission x - ray fluorescence spectroscopy as a method of studying the thin layer ' s characteristics, such as composition and thickiness etc. with the intimately combining of theoretical, set - up and experimental research, the study on the analysis techniques of grazing emission x - ray fluorescence is developed, and the first set of grazing emission x - ray fluorescence setup is established. at the same time, the angular dependence of the fluorescence intensity with different thickness layer is measured. all the work in this thesis provides the basis for the further researches
本論文採用理論、裝置和實驗研究密切結合的方式，開展了掠射x射線熒光分析技術研究工作，在國內建立了首臺掠出射x射線熒光光譜分析裝置，並對不同厚度單層和雙層薄膜樣品在掠出射條件下產生的熒光光強與掠射角的對應博士學位論文:掠射x射線熒光分析技術研究關系進行了實驗測定。In this way, the wattless power of the test signal at the head spot of the fault is only needed to sample when the system fault occurs, which simplifies the measurement
這樣，當系統發生故障時，只需採集故障首端測試信號的無功功率，大大地簡化了測量的方法。First sample test report
首樣測試報告分享友人