頻次分佈 的英文怎麼說
中文拼音 [bīncìfēnbù]
頻次分佈
英文
frequency distribution-
Aiming at the practical situations of frequent accidents on mine gas and existing mine gas wire communication system needs to be improved towards wireless communication system, the paper put forward all nodes of gas sensor distributed in underground were brought into an intelligent and flexible wireless network system, so as to form a gas sensor networks system with layering and characteristic of intrinsical safety which relayed on the sensor ' s node
摘要針對礦井瓦斯事故頻發、現有礦井瓦斯監測有線通信系統急需向無線通信系統改進的實際情況，文章提出了將分佈於井下的所有瓦斯傳感器節點納入一個智能化、結構靈活的無線網路系統，組成以傳感器節點為依託的層次化且具有本安特性的瓦斯傳感器網路系統。The algorithms estimate the doa of the broadband distributed source fron the secondary diagonal elements of the covariance matrices generated from every frequency domain of the received broadband signals, thus avoiding unwrapping of phases
該類演算法首先將陣列接收的寬帶信號變換到頻率域，然後對于每個頻率形成陣列接收信號協方差陣，最後由該協方差陣的次對角線元素估計寬帶分佈源的到達角，其主要特點是避免了相位展開。There are two important questions : one is what is the properties of the seismicity before the earthquake, the other is about the character of the aftershock sequence. the completeness of the catalogue of earthquakes with magnitude over 3. 0 can be confirmed by different independent tests such as minimum magnitude distribution, frequency - magnitude distribution and the rydelek - sacks test
本文用最低震級分佈、震級頻度分佈和rydelek - sacks檢驗等方法分析了格爾木單臺、青海省地震臺網和格爾木臺陣記錄到的本次地震的餘震序列，確認餘震的記錄對于m _ l3 . 0級以上的地震是完整的。The six sigma black belt should be able to compute the mean and standard deviation from a grouped frequency distribution
6西格瑪黑帶應能從一組頻次分佈數據計算出均值和標準偏差。Based on the propagation law of the cross - spectral density function in the space - frequency domain, the properties of polychromatic vector gsm beams through a paraxial optical abcd system are studied. the analytical propagation expressions for the cross - spectral density matrix of vector gsm beams passing through a paraxial optical abcd system are derived, which permits us to study the propagation properties of vector gsm beams, including the propagation - induced polarization changes, effect of the spectrum bandwidth and irradiance distributions in a unique way. there are some applications of the theoretical results
基於空間一頻率域中交叉譜密度函數的傳輸理論，研究了多色矢量gsm光束通過abcd光學系統傳輸時偏振特性的變化規律，首次推出了矢量高斯一謝爾模刑fgsm ）光束通過近軸abcd光學系統交叉譜密度矩陣的傳輸公式，並對矢量gsm光束傳輸中偏振的變化、譜寬的影響和強度的分佈等進行了統一研究。And the results of calculation and numerical simulation indicate, without increasing the intrinsic collector - junction area of power devices, collector - combed structure helps to raise the intrinsic heat - dissipating area and base ' s perimeter, improve heat - dissipating method of each cell of the chip, enhance the distribution uniformity of junction temperature and current of each cell of the chip, reduce the thermal resistance and raise the dissipation power pd and output power p0, fairly well relax the contradiction among frequency, out - put power and dissipation power of the devices, and further improve the devices " property against second breakdown
而計算分析和二維數值模擬分析結果表明：梳狀集電結（基區）結構在不增加器件本徵集電結面積的條件下，增大了器件的本徵散熱面積和基區周長，改進了每個子器件單元內的散熱方式，提高了單元內結溫和電流分佈的均勻性，降低了器件的熱阻，增大了器件的耗散功率和輸出功率，較好地緩解了目前傳統結構中頻率與功率、功耗的矛盾，並有利於改善器件抗二次擊穿的性能。It is known that end - point driven and static configuration agent based adaptive methods can not apply to analyze extension, dynamic and complexity properties of large - scale video multicast applications. to solve this challenging problem, we develop a hierarchical adaptive architecture for large - scale layered video multicast ( halvm ) based on dynamic self - organized agent. halvm decomposes a large - scale video multicast system into a series of hierarchical sub - systems of small - scale
該體系綜合了代理的動態自組織協議和可伸縮性視頻轉換編碼技術，將復雜的大型視頻組播應用系統的動態自適應問題分解為層次化的小型視頻組播應用子系統，由發送者、接收者和層次化代理分佈完成自適應功能，是一個擴展性能好、管理與控制效率高的自適應解決方案。Data used in this work are north pacific ssta, 160 stations precipitation of china, and ncep reanalysis data. main results are as follow : ( 1 ) it is found that a apparent transition of north pacific ssta in later 1970 ' s : eastern and middle - equatorial pacific ssta turns from cold to warm with area extending, and mid - latitude pacific ( west wind drift zone ) turns from warm to cold. during this transition of ssta, different characters also appear in el nino and la nina : before 1976, la nina happens more frequently, and its duration is longer, el nino zone develops from negative ssta in the early stage ; after 1976, el nino happens a little bit frequent and longer with more intensity than before, el nino zone develops from positive ssta in the early stage ; the course of ssta variation has an enso cycle of 2 - 6 years, annual oscillation of 8 - 9 years, and decadal variation of about 22 years
本文採用1950 - 1999年北太平洋海表溫度（ sst ） 、中國160站夏季降水和ncep再分析的歐亞500hpa高度場等資料，利用eof 、 svd 、小波分析、合成分析和相關分析等方法，在分析北太平洋海溫時空分佈特徵的基礎上，著重探討了海溫異常及其年代際變化對我國東部降水的影響，並對降水、高度場和海溫三者之間的關系進行了分析，以試圖尋找三者異常之間可能的聯系，主要結論如下： （ 1 ） 1976年前後，北太平洋海溫經歷了一次明顯的轉變，赤道中、東太平洋厄爾尼諾海區由冷轉暖，暖水范圍增大，中緯度西風漂流區海溫由暖轉冷；在這樣的年代際背景下，厄爾尼諾、拉尼娜事件在不同的時期也有不同的特徵：在76年前，拉尼娜事件發生頻率高，持續時間長，事件起始於負海溫距平；而76年後，則是厄爾尼諾事件發生頻率略高，持續時間長，強度增大，事件起始於正海溫距平。And we use statistical computation and relativity analysis for the first time. so we make the conclusion that the simulation system obeys the power - law frequency - area distribution by improved 2 - d ca model. and by relativity analysis we know simulation sequences are long correlative
通過改進的二維沙堆自動機模型的構建和模擬，本文得到了一系列模擬數據，並在此基礎之上，首次通過統計計算和相關性分析，得到如下結論： （ 1 ）改進的二維沙堆自動機所模擬的系統在沙粒暴發頻率對暴發規模的關繫上服從負冪律分佈。On base of studying domestic and foreign theories and methods for evaluations of st achievements, this thesis analyze 10 methods for evaluations of st achievements, such as application frequency statistics, delphi, literature research and application relevance analysis, etc. by studying and analyzing the work of technology planning bureau, transport ministry between 1991 and 2000, and the evaluation items for the achievement identification, acceptance and check - up which were taken by transportation technology department, the author come up with some methods, which are scientific, standard and quantified, for evaluating transportation st, that is, in accordance with the transportation st achievement management and achievement precise database within eighth five and ninth five, and with the statistic analysis such as research contents, professional classification, intensity input, achievement characteristics, field distribution, characteristics of department undertaken, st talents characteristics, award inf ormation, characteristics and regularity of transportation st achievements, problems that are still existed and countermeasure are forwarded ; according to the requirement of evaluations system of the transportation st achievement, the principle and methods for the system designation are given, and the constitution of the system are provided ; in order to improving the scientific organization and management of our national transportation st achievements, many subjects are under discussion, including institution for evaluation of st achievement, valuation organization, standard for evaluation technology, database for consulting transportation experts and how to simplify the procedure of transportation st achievement, etc.
本論文在對國內外科技成果評價理論、方法廣泛調查基礎上，研究分析了諸如應用頻次統計法、德爾菲（ delphi ）法、文獻調研法、應用相關分析法等10種科技成果評價的方法，通過對1991至2000年交通部科技計劃所實施情況，由交通科技主管部門組織進行了成果鑒定、驗收和評審等成果評價的項目的分析，提出了本人對交通行業對科技成果進行科學、規范和定量地評價的方法，即：在建立「八五」 、 「九五」交通科技成果管理及成果簡要數據庫的基礎上，通過對研究內容、專業分類、投入強度、成果屬性、地域分佈、承擔單位屬性、科研人員屬性和獲獎情況等諸多方面進行統計分析，研究了交通科技成果的特點和規律，提出了存在的問題和對策；從建立交通科技成果評價指標體系的要求上，具體提出了交通科技成果評價指標體系設計原則與方法探討了交通行業科技成果評價指標體系的構成及權重確立等問題；從加強我國交通行業科技成果評價的科學化組織與管理出發，探討了如何建立科技成果評價制度、評價機構、統一的評價技術標準和交通行業專家咨詢數據庫以及如何簡化交通科技成果評審形式等問題。The climate factor distribution coincide very well with the dust storm occurrence frequency distribution, which suggested that the climate changes induced the dust storm downward trend in whole during these 40 years in china
結果發現氣候因子分佈與沙塵暴的發生頻次分佈對應性很好，提出氣候變遷導致在這40年中國沙塵暴整體上呈現出下降趨勢。In order to make comprehensive analysis on the changing behaviour, the author has investigated and verified all of the a share listed companies that have changed use of proceeds since the foundation of chinese stock market. firstly, this chapter analyzes the general situation. secondly, this chapter makes detailed statistics and analyses on the 5 aspects of the changing behaviour
本章首先考察了上市公司募資變更的總體情況;接下來從募資投向變更的次數、頻率及幅度，變更過募資投向公司的行業特徵，變更募資投向的公告原因，改變過募資投向上市公司的地區分佈，以及募資變更前後的投向等5個方面進行了詳細的數量統計和分析。Second, the bar of the frequency - distribution and the curve of lorenz and the g coefficient are talked about the spatial distribution of day to day precipitation. the results show that the heterogeneous of day precipitation is strong on every day in a year. the spatial distribution model is left skew all in four seasons and it is different from the monthly precipitation
其次利用全國700個測站逐日降水資料的空間分佈頻數直方圖及洛倫茲曲線和基尼系數闡述了我國逐日（ 24小時）降水非均勻性的事實，直方圖顯示全國范圍內逐日降水的水平空間分佈型在四季都是一種明顯左偏態型，與月降水量的水平空間分佈型略有不同；基尼系數值的月際變化也與月降水量的變化相反。As the targets flying in groups may spread over several range of cells and their doppler frequencies are time *. varying, a scheme of target number detection in groups on a conventional low *. resolution radar is proposed based on a time *. range *. doppler image cube which is constructed by substituting a time *. frequency transform for the fourier transform in the conventional range *. doppler imaging
針對實際編隊目標在距離上的分佈特性和目標多普勒頻率的變化規律，利用聯合時頻變換代替傳統傅立葉變換，建立目標時間-距離-多普勒立體像，提出一種基於立體像的目標架次檢測方法。Simulations on light intensity are validated by experiments and influence of mechanical dither on gyro frequency stabilization is studied for the first time. then it is point out that the key to improve the precision of frequency stabilization is to choose appropriate modulation frequency based on the frequency spectrum of sharp pulses, which is introduced by mechanical dither. thereafter, experiments of frequency stabilization under different modulation frequencies are made
通過實驗驗證了光強模擬結果，首次分析了機械抖動對穩頻的影響，指出提高機抖陀螺小抖動穩頻精度的關鍵在於：根據機械抖動引入的交流光強尖峰脈沖頻譜分佈選擇合適的調制頻率，並給出了不同調制頻率的穩頻實驗結果。Secondly, considering the need of frequency stabilization, mdrlg ' s light intensity is simulated. the simulations indicate that sharp pulses are produced in the ac light intensity by mechanical dither. as the pulses have a wide frequency spectrum and range over the modulation frequencies of frequency stabilization, mechanical dither may reduce the precision of frequency stabilization
其次，根據穩頻需要對機抖陀螺輸出光強進行了模擬，模擬表明機械抖動會在交流光強中引入尖峰脈沖，且尖峰脈沖頻譜分佈較寬，在小抖動穩頻調制頻率范圍內有功率輸出，因而可能降低穩頻精度。To extend the results, a total system utility model for avm systems is presented in this thesis. and an extendable, hierarchically distributed solution is also proposed, by which we can figure out optimally the bandwidth, the layer number, and the layer rates for each session
針對這一問題，本文分析和歸納了自適應視頻組播應用系統整體效能模型，以整體效能最大化為目標，提出了一個可擴展的層次化分佈求解方法，可獲得視頻組播應用系統中各個會話的優化帶寬、優化的分層數量和各層次優化的發送速率。China is one of the countries which are harmed by storm surge both tropical and temperate cyclones, the disaster of storm surge can occure every seasons and from south to north in china ' s coastal area. based on the analysis of the features of temporal and spatial changes of storm surge disaster in the recent 50 years, this paper focuses on the frequency changes of historical records in recent 500 years and measured data in recent 50 years of storm surge disaster and the relationships between storm frequency change and climate fluctuation. meanwhlie, the effects of future increase in the frequency of tropical cyclones landing or affecting china and relative sea level rise with global warming on storm surge disaster of china ' s coastal area also discussed. the results show that, in recent 500 years, there are direct relationships between storm frequency change and climate fluctuation, i. e., high global mean temperature correspond with high storm frequency and low mean temperature correspond with low storm frequency. storm surge disaster in china ' s coastal area will be exacerbated with global warming
中國是全球少數幾個同時受臺風風暴潮和溫帶風暴潮危害的國家之一，風暴潮災一年四季，從南到北均可發生.本文基於中國沿海近50年風暴潮災時間變化和空間分佈特點的分析，著重探討了近500年全國及長江、黃河、珠江三角洲的歷史記錄和近50年實測風暴潮災發生頻次的變化及其與氣候波動的關系，並對未來全球變化背景下，中國沿海風暴潮災的變化趨向進行了討論.結果表明:近500年來，中國沿海的風暴潮災在氣溫較高的偏暖時段比氣溫較低的偏冷時段明顯增多.近50年實測臺風暴潮災的變化也是如此，而溫帶風暴湖的變化則與此相反.未來全球變化引起的登陸影響中國的熱帶氣旋頻次增加和相對海平面的上升，均將導致風暴潮災呈加重的趨向Second, monte - carlo method is used to simulate the transports of ions penetrating through the rf sheath in terms of the above sheath dynamic model. here, both elastic collisions and charge - exchange collisions between ions and neutral particles are considered. the effects of collisions on the distributions of ions energy and angle incident on the substrate were calculated
其次，利用已建立的碰撞等離子體鞘層模型和monte - carlo方法模擬了離子在射頻鞘層電場中的運動過程，不僅考慮了離子同中性粒子的電荷交換碰撞，還考慮了它們之間的彈性碰撞過程，研究了碰撞效應對入射到基板上的離子能量分佈和角度分佈的影響。Analysis has been done on the human behaviour and reaction duration of the investigated persons inside the buildings with different ages, different gender, different educated level, different fire experiences, different location inside buildings, different activities, different health conditions and different approaches of fire alarm. three highest distribution values of the first human behavior were concluded about fire reporting, fire identifying and fire warning to others. this paper have first obtained the range of reaction duration and the characteristics of frequency distribution under different situations of the investigated persons inside the buildings in china
在總結前人對人的火災行為研究經驗的基礎上，本文首次對陜西、山西、河南三省的169起建築火災逃生行為進行了問卷調查，對回收到的274份問卷的個人信息、環境信息、火災行為反應信息進行了頻率分佈統計；分析了不同年齡、不同性別、不同受教育水平、不同火災經驗、在建築物內的不同位置、不同活動狀態、不同身體狀況、不同獲悉火警信息途徑的調查對象的第?行為反應及反應時間；得出了報警求助、查證火災信息、通知他人火災信息等三個最高的火災第一行為反應分佈值；得到了建築火災中調查對象第一行為反應的時間范圍及不同條件下的分佈特徵。分享友人