complex sampling 中文意思是什麼
complex sampling
解釋
繁復抽樣法-
Compared with primary second sampling a / d converter, it realizes digital feedback by digital circuit and does n ' t adopt high accuracy d / a converter with complex technology and high price. it has many excellent qualities, such as high - integration, high - accuracy, widely used, low - price. it can be widely used in test and measure system, scientific instrument, iatric instrument, automatic test system etc. so popularizing this new type a / d converter has very significant meaning
與原有的兩次采樣a / d轉換器相比，用數字電路實現數字反饋可不用技術復雜、價格昂貴的高準確度d / a轉換器，具有集成度高、準確度高、適用性強、價格低等優點，可廣泛應用於測量測試系統、科學儀器、醫療儀器、稱重儀器、自動測試系統等。 -
Based on extensive field observation and population sampling in 71 populations of 20 provinces, this dissertation investigates morphology, ecology, cytology, cytogeography and its sequences of this complex. the results show that a. ageratoides polyploid complex might be originated in northeastern china, from which it migrated along three different routes
本研究基於對我國20個省、市、自治區43個地點71個三脈紫菀復合體居群的野外觀察和採集，從形態學、生態學、細胞學、細胞地理學和分子生物學等各方面，對三脈紫菀多倍體復合體進行了綜合性研究。 -
Taken two heavy metal contaminated soils in copper mine field of hongtoushan area and lead - zinc mine field of qingchengzi area as sampling sites, studied the abundance and diversity of amf community and the relation of which to ecological factors ; two experiments were managed by pot culture and four - compartments culture system with festuca. rubra and red clover as host plants inoculated with gintraradices, gmosseae and gcaledordinum to study the effect of different amf on the uptake and accumulation of heavy metal in cd contaminated soil and cu > zn - pk cd complex - contaminated soil
採用盆栽、四室根箱培養的方法，研究了接種g . intraradicesg . mosseae和g . caledordinum在cd污染和cu 、 zn 、 pb 、 cd復合污染土壤中對紫羊茅、三葉草吸收、累積重金屬的影響，明確了叢枝菌根菌在重金屬污染土壤生物修復中的作用。主要結果如下： 1 、沈陽礦區重金屬污染土壤中，共發現叢枝菌根菌6個屬23個種，已鑒定22種， 1個未定種。 -
In data sampling circuit, high - speed, complex programmable logic device cpld technique is used. high - speed double - port ram, control sampling time sequence logic, cpu interfaces and bus circuit are implemented in cpld. sampling speed is up to 80mhz, sampling depth is ik - byte, and cpld can fulfill the requirement of the software arithmetic to sampling
在數據採集電路中採用了高速復雜可編程邏輯器件cpld技術，晶元內設計有高速雙埠ram 、控制采樣時序邏輯及cpu介面、總線等電路，采樣速率高達80mhz ，采樣深度1k位元組，很好地解決了超聲波微位移傳感器軟體演算法對采樣的要求，並可實現在線升級，大大提高了系統的整體性能。 -
A coherent electromagnetic pulse in the range between the far - infrared and microwave region is used as a detection source. the amplitude of the wave is recorded by electro - optical or photoconductive sampling. after fast fourier transform, the amplitude and phase of the wave is given, then the complex refractive index standing for the absorption and dispersion of the material in thz region is extracted
Thz （ 10 ~ （ 12 ） hz ）時域光譜技術是20世紀90年代發展起來的一種新型的光譜測量技術，它使用頻率介於遠紅外和微波之間的相干電磁輻射脈沖作為探測源，利用電光取樣或光電導取樣的方法直接記錄thz輻射電場的振幅時間波形，通過傅立葉變換得到測量信號振幅和相位的光譜分佈，進而獲得材料在thz波段的復介電常數，即色散及吸收等信息。 -
With the ability of binary control mask to deal with under - sampling areas successfully, and with the ability of modulation ordering resulting in an optimized path, the new algorithm can be applied to complex phase unwrapping
新演算法對于采樣不足的區域有著很好的處理效果，並且保留了調制度函數本身處理局部陰影等截斷位相不可靠區域的能力。 -
To local minimum areas. with the ability of modulation to mask the unreliable areas such as noise, local shadow, and the ability to deal with under - sampling areas successfully, the new algorithm can be applied to complex phase unwrapping
新演算法不僅保留了調制度函數本身處理局部陰影噪聲等截斷位相不可靠區域的能力，而且對于采樣不足的區域有著很好的處理效果，適用於復雜的位相場展開。 -
Comprehensive well and geological constrained seismic inversion - comprehensive constrained inversion ( cci ), is based on nonlinear inversion techniques. it makes full use of detailed vertical resolution of well data and horizontal dense sampling of seismic data. according to geological theory, it inverts lithological profile in multi - wells and complex geological condition. at present, there are no perfect mathematical methods to solve nonlinear equations
地震資料與測井資料的綜合約束反演是在非線性反演的基礎上，充分利用測井資料詳細的垂直分辨能力和地震資料地面上采樣點密集均勻分佈的特點，把這兩種資料結合起來，取長補短，以地質理論為依據，針對多井及構造復雜的地質條件，反演出井以外的巖性剖面。 -
Because of the structure of the traditional polarization diversity and combining scheme is too complex, after researching the polarization diversity and diversity combining technology, a new structure of receiver is proposed. in this structure the uniform sampling second - order dpll is used to remove the frequency bias after frequency discrimination
該結構控制較為復雜，為此結合實際項目要求，在研究了極化分集接收關鍵技術的基礎上，提出了一種改進的極化分集接收機結構，即在鑒頻之後利用均勻采樣二階數字鎖相環誤差傳遞函數的高通特性去除各種頻偏分量。 -
The controller takes full advantage of the features of ti tms3201f240xa processor, such as high performance processing capabilities, plenty of peripherals on chip and high real time control. by the vital of these features the fast ac sampling, synchronic pulse, digital shift phase trigger pulse, can bus communication, pid control method and excitation limitations are realized. the pretreatment of the switch signals and the test of the shift phase trigger pulses are realized by using the complex programmable device ( cpld )
該勵磁控制器充分發揮了tms3201f240xadsp處理器的強大的數據運算能力、豐富的片內外設資源和較強實時控制能力，用單片系統結構實現了快速交流采樣，數字同步脈沖形成， can現場總線網路、以及pid控制演算法和各種勵磁限制等功能；用cpld器件實現了開關量抖動預處理和可控硅觸發脈沖遺漏的檢測，減輕了dsp處理器負擔，提高了勵磁控制器可靠性、抗干擾能力和控制能力；使用vc + + 6 . 0開發的基於windows操作系統的勵磁系統調試軟體，人機界面簡潔友好，使用操作靈活方便。 -
The floating - point a / d conversion scheme was employed to increase the system ' s dynamic range. complex programmable logic device ( cpld ) was also used to perform the system ' s function such as data sampling trigger control and data storage control, etc. aduc812, a new type of microprocessor with full a / d converter, was utilized to fulfill the a / d conversion
在數據採集電路設計中，採用了浮點放大技術來提高系統的動態范圍；通過引入可編程邏輯器件來實現觸發控制、存儲控制；采樣過程中應用了時序重疊技術，從而實現了數據採集系統的流水線作業方式。 -
Chapter one introduces the recent development of usb2. 0 and the overall architecture of transceiver interface ; chapter two proposes the design flow and design style ; chapter three presents the whole system and module partition ; chapter four emphasizes on the dual - mode transmitter circuit, and gives out the simulation waveforms ; chapter five focuses on the design of over - sampling receiver and dll ( delay locked loop ) module ; chapter six designs the band - gap reference circuit. in the end, it concludes the design, and estimates the trend of usb. the dissertation is emphasized on dual - mode transmitter architecture, implementation of high speed dll using dba ( digital - based analog ) technology and a new design methodology for complex digital modules in mixed - signal circuit
本文第一章介紹了usb2 . 0的發展現狀和收發器介面晶元系統；第二章介紹了該晶元的設計流程和風格；第三章介紹了該介面晶元的總體構架以及模塊劃分；第四章著重介紹雙模發送器電路設計並給出了模擬驗證波形；接下來第五章分析了過采樣接收器的設計並對其中的dll （ delaylockedloop ）模塊設計進行了詳細的分析；第六章介紹了本晶元內置的基準電壓源的設計；最後對本文的設計一個總的回顧和總結，並展望下一代usb的發展方向。 -
An upper bound of the closed loop performance statistic given by the index of quadratic performance is found for all admissible parameter uncertainties. the poles of the closed loop systems is described by the delta operator models in the specified stable region of the complex plane which makes the poles in the specified region when the sampling period is becoming shorter
採用線性矩陣不等式處理方法及李亞普諾夫二次穩定性理論，分析、證明了極點約束控制的存在條件，並利用lmi方法把delta運算元系統的極點配置在一個穩定的區域內，解決了delta域內的極點配置問題，使得期望的極點始終在這個穩定的區域內。 -
As an vxi equipment designed for testing complex data system, it wins through the shortcomings of traditional test method which uses signal generator to supply stimulus and utilizes logical analyzer to sample response data. it can achieve complicated cooperation between stimulus and response by sampling response data in the single period and then comparing it with the expectation data while imposing test stimulus on the test objective
它是為滿足復雜數字系統的測試需要而設計的vxi器件，克服了用數字信號發生器提供激勵並使用邏輯分析儀採集響應數據這種傳統測試手段的不足，在激勵和響應之間實現復雜的聯動配合，將測試激勵施加於被測對象的同時，在單周期內採集響應數據並與預期數據實時比較。 -
A study on the complex sequential analytical method for pest control decision making and its sampling technique
害蟲防治決策的復序貫分析方法及抽樣技術 -
This method can be used in the vr environment walkthrough system with relatively complex region, and no special sampling device is required
該方法可以用於漫遊區域比較復雜的vr場景漫遊系統，而且不需要使用專門的采樣設備。
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