自差法 的英文怎麼說
中文拼音 [zìchāfǎ]
自差法
英文
homodyne-
And then facing the problem of the channel estimation of the adaptive modulation system, we conclude out the channel estimation algorithms on maximum likelihood ( ml ) estimation and maximum a posteriori ( map ) estimation under the condition of flat fading channel and selective fading channel in detail. to meet flat fading channel, we simulate the relationship of the ratio between the error covariance in map estimation and ml estimation and pilot symbol message length. the conclusion can be drawn from these results
接著，對自適應調制系統中的通道估計問題難點，詳細推導了平衰落通道條件下和選擇性衰落通道條件下最大似然（ ml ）估計和最大后驗概率（ map ）估計演算法，針對平衰落通道，我們模擬了map估計和ml估計的方差與導頻符號長度的關系，模擬結果表明，錯誤方差受多譜勒頻率的變化影響最大，並且對實際的自適應調制系統，導頻符號長度的取值超過20個符號長度時， map通道估計明顯優于ml通道估計。They are jinfo mountain in nanchuan county ( natural protection section ), wuling mountain in qianjiang county ( national emphases forest demonstration county which forest cover rate is beyond 50 % ) and zhongliang mountain in beibei county ( artificial destruction is very grave ). some main land use patterns i. e. woodland, garden, infield, abandon infield, shrub and grassplot are selected in those three sample sites. four aspects on soil fertility index of karst environment under different land use patterns in these three sample sites, are revealed in this paper, by using the field test, indoor measure and analysis, outdoor experiment and field investigation, and the knowledge and technique of soil, ecology, physics and chemistry etc. they are physical characteristic ( effective soil thickness, organic layer thickness, soil texture, water - stable aggregate and soil water etc. ), chemical fertility ( organism, omni - n, omni - p, omni - k, alkali - nitrogen, available p, available k and rapid available k etc. ), soil animalcule ( bacteria, fungi, actinomyces and their grosses ) and soil - seed - pool ( plant community diversity index ) in karst ecosystem
本研究以重慶市的南川金佛山（自然保護區） 、黔江武陵山（國家重點退耕還林示範縣，森林覆蓋率50以上）和北碚中梁山（遭人為破壞嚴重）典型巖溶區為對象，選擇了幾種重要的利用方式，包括林地、果園、耕地、棄耕地和灌草坡，採用野外巖溶生態調查和室內試驗測量分析相結合的方法，以不同土地利用方式巖溶土壤肥力為重點，對不同土地利用方式土壤肥力特徵進行量化分析，找出巖溶土壤肥力差異的主要方面及其根本原因，論文主要從土壤剖面物理退化指標（有效土層厚度、有機質層厚度、質地、團聚體、水分含量等） ，化學肥力退化指標（有機質、全n 、全p 、全k 、堿解n 、速效p和速效k等） ，樣地土壤微生物指標（細菌、真菌、放線菌數量及總量）以及樣地土壤種子庫植物群落多樣性等4個方面對重慶典型巖溶區的土壤肥力特徵進行了較為詳細的分析研究，為巖溶地區士壤資源的合理利用及結構的調控管理提供依據。The method is given to solve the problem in adaptive demodulation that adjudgement will worsen when the snr is low. by using the error signals to reduce the demodulated signals, the bit error rate will be improved
模擬中，針對dpsk信號的自適應解調中小信噪比下門限失效的問題，提出了利用誤差改進門限判決的方法，將誤碼性能提高了1 2db 。In this paper, coordination accuracy calculating program is developed based on studying the main way and method of solving coordination problem, which is able to calculate self - motion and distribute tolerance in reason through input alternant information
研究了解決協調問題的主要方法，由此開發出協調準確度計算軟體，具有互動式信息輸入、自動計算、合理分配公差等功能。Its symbolic connotation from this owes to the returning cyclical nature of the seasons ; the oscillations of the night sky ; self - fecundation ; disintegration and re - integration ; truth and cognition complete ; the androgyne ; the primaeval waters ; the potential before the spark of creation ; the undifferentiated ; the totality ; primordial unity ; self - sufficiency, and the idea of the beginning and the end as being a continuous unending principle
它含蓄地象徵著季節的來回循環；黑夜的振動；自我受胎；瓦解和綜合；真理和認識的完成；雌雄同體；原始的水；潛在的創世火花；無差別性；整體；原初的合一；自給自足；象徵無休止的永恆法則下的開始和終結。The article mainly studied and analyzed the chemical structure and conponents of yeast, pointed out that the way that yeast autolysis combined together with both breaking - wall in temperature difference and high - pressure homogenization can be used to promot the inside things from waste yeast cell and enhance the extract rate, thus searched for the technology in higher extraction rate
摘要主要研究分析了酵母化學結構與組成，提出了酵母自溶、溫差破壁、高壓均漿三者相結合的方法來促進酵母內容物溶出提高抽提率，探索抽提率比較高的工藝流程。In algorithms, classification algorithms are divided into two cases : one for known statistical distribution model and the other for unknown statistical distribution model. four classification algorithms, the bata - prime statistic model fusing quadratic gamma classifier, based on sar image rcs reconstruction and space position mode, on the mixed double hint layers rbfn ( mdhrbfn ) model and on the self - adapt fuzzy rbfn ( afrbfn ) model, are derived. the problems, including how to further improving the class ratio of the bayes decision, decreasing the dependence on the statistical model and directly providing the adapted algorithm with samples, are solved
提出了基於徑向基函數神經網路（ rbfn ）的雙隱層混合網路（ mdhrbfn ）模型，解決了標準神經網路在具體sar圖像地物分類中分類類別數目不夠和分類精度差的問題；提出了基於模糊推理系統的自適應模糊rbfn分類（ afrbfn ）模型，兼顧通用性與精確性，增強人機交互能力，進一步提高了演算法分類率。There was a wide gap between the views of the two statesmen on the bilateral cooperation.
對雙方合作的問題，兩位政治家各自所持的看法差距甚大。First, this section resorts various valuation model and hold that it would be better to classify the valuation into traditional method, binominal tree method and option - adjusted spread method. according to the sequence, this article introduce three valuation model respectively and point out which aspect these method improves on in different phases and their applicable conditions
本章對有關抵押貸款證券的定價方法進行了系統的歸納與整理，認為主要存在三種定價方法，分別為傳統定價方法、二項樹定價模型和期權調整價差定價模型，並按照定價方法的發展順序分別予以介紹，同時指出了不同階段定價方法的改進之處和各自的適用條件。Aimed at the flaw of weak anti - slide function in traditional engineering machine, the thesis puts forward a new auto - anti - slide differential gear system controlled by intel 8751 microcontroller, which adopts the fuzzy logic as its control algorism and the best slide ration ( s ) as system ' s control target
針對傳統工程機械差速系統存在防滑功能不強的缺陷，提出以intel8751單片機為控制晶元，以最佳滑移率s為控制目標，採用模糊邏輯控制為控制演算法的自動防滑差速系統。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。Traditional sports and folk sports are of great variety, which may be used as pe resources. but such contents are absent in the pe textbooks. so it is natural that the pe classes can not arouse interest of students ; the number of the playground and sports apparatus can not meet the standard. neither can they satisfy the demand of students ; it ' s practical to take advantage of the local geographical resources in pe curriculum ; extracurriculum and after - school activities can not meet the demand of students, which should be developed and utilized to a greater extent ; the structure of pe teachers is far from satisfactory
結果顯示，甘肅少數民族地區小學體育課程資源存在著課程內容中民族傳統體育和民間體育活動項目豐富，然而教材內容沒有考慮地方和實際情況，很難引起學生的興趣；各級各類學校體育場地、器材的要求相差甚遠，現有體育場地器材都無法滿足教學要求和學生的體育需求；自然地理財富作為一種體育課程資源來開發很具有價值和實際意義；課外體育活動和校外體育活動還不能滿足學生的需求，尚須大力開發和利用；體育師資結構不合理，學歷結構偏低，且相當一部分是民辦教師轉正等問題。The deficiency of these substances will directly lead to a low productive capacity of animals, a poor resistance, a slow growth of fat, a small output of milk, and a weak fertility, etc. in order to help the herders find solutions to these problems, mr. bazil confected a feedstuff with necessary minerals for local herders based on the results of the float grass testing and his own personal work experience of many years
去年秋天對當地水草進行檢測，結果發現缺少多種牲畜體內所需的礦物質和微量元素。這些物質的缺乏會直接導致牲畜生產能力低下，抵抗力差，長膘慢，奶產量低，繁殖能力差等。為了能幫助牧民找到解決這些問題的方法，巴茲爾先生根據水草檢測結果及自己多年的工作經驗為當地牧民配製了所需礦物質飼料。The fourth chapter " reseach on fractai structure of stock price " anaiyzed the fractai structure of stock price, deduced the investment function, caiculated the hurst exponent, 3 correlation dimension, and max lyaponov exponent, analyzed the self - similarity, long range dependence, circulation period of stock price and sensitivity of stock price to the initial value, suggested took the exponent characterize fractal instead of variance as instrument to measure risk
第四章分析並檢驗了股票市場的分形混沌特徵，推導了投資函數，計算了表徵股票市場分形特徵的hurst指數，關聯維和最大lyapunov指數，分析了股票價格的自相似性、長期記憶和循環周期，分析了股票價格的波動對初始條件的敏感性，提出中國股票市場具有混沌分形的特性，用傳統的方差法度量股票風險是無效的，必須使用混沌分析能夠理論來刻畫股票收益的風險，建立收益模型。It ' s considered that the only child juvenile delinquency tends to have more wicked property and the increasing crime rate, and the instrument of only child juvenile delinquency tends to be adult - alike, intellectualized, in team work and with younger ages. it deeply explores the subjective and object reasons for the only child delinquency. the subject reason is including devoid of correct philosophy and value of life, too strong self - centralized consciousness and dependency, lack of self - supporting, legal idea and social communication ability and not knowing how to choose friends etc. the objective reason is that the unsuited environment and misplay of scholastic and family education, ill influence by the community and so on
本文首先從犯罪的主體、犯罪的客體、犯罪的主觀方面和犯罪的客觀方面闡述了獨生子女犯罪的構成；接著分析了我國獨生子女犯罪的現狀及其危害性，認為我國當前獨生子女犯罪呈現犯罪性質惡劣，重大刑事犯罪率上升，犯罪手段成人化、智能化，犯罪方式團伙化，犯罪年齡低齡化等特點，闡述了獨生子女犯罪對獨生子女自身、家庭、同輩群體以及社會的危害；然後深入地剖析了我國獨生子女犯罪的主要主客觀原因，認為主觀原因包括缺乏正確的人生觀、價值觀，自我中心意識強，感情脆弱，依賴性強，生活自理能力差，法制觀念淡薄，人際交往能力差，擇友不慎等方面；獨生子女犯罪的客觀原因有不良的社會環境，學校教育的失誤，家庭教育的失當，社區環境的影響等。The cable sag and bending stiffness effects are studied on the higher natural frequencies of cable vibration. it is found that the differences of the higher adjacent frequencies go to the fundamental frequency of the taut string theory even though the cable sag or bending stiffness is included. this unique characteristic of cable vibration is used to determine the cable tension with the well - known taut string theory
2 .考慮垂度和抗彎剛度對高階自振頻率的影響，探討了索相鄰頻率之差，發現索的高階頻差就是弦振動理論的基頻，利用這一特性，分析了頻差法測索力的精度和適用范圍。Since 1952 the markowitz ’ s mean - variance portfolio theory inception, sur - rounding this issue which how to measure risks, it has generated a lot of risk mea - surement methods and bring a lot of portfolio models, such as mean - semivariancemethods, mean - downside risk methods, mean - absolute deviation methods, mean - absolute semideviation methods, mean - absolute downside risk, and soon. 1999, duarte proposed a portfolio optimization uniform model that unifiedthe six methodologies mentioned above
自從1952年markowitz的均值-方差投資組合理論問世以來，圍繞著如何對風險進行度量這一問題先後產生了許多的風險度量方法，帶來了很多的投資組合模型，如均值-半方差法、均值-下滑風險方法、均值-絕對離差方法、均值-絕對半離差方法、均值-絕對下滑風險方法等等。There are difficulties in noisy speech recognition, especially low signal - to - noise rations are more difficult. this paper describes briefly six methods for speaker - dependent noisy speech recognition isolated words. they are lpc prediction error method, one - side auto - correlation sequence lpc, acoustic front end processing, canonical correlation based on compensation method, combination of features method and increase of poles method. the experimental results show that all the six techniques can improve effectively noisy speech recognition, and the best noisy speech recognition rate is above 80 % when snr 0db
它們是：線性預測誤差法，單邊自相關線性預測法，語音前端聲學處理法，正則相關分析的譜變換補償方法，特徵綜合法和同模極點增加法。實驗結果表明，這6種方法都有效地提高了噪聲環境中語音識別率，其中較好的方法在強噪聲環境中信噪比為0db的語音識別率達到80 %以上，為信噪比較低的噪聲環境中自動語音識別展現了美好前景。The claim has been made upon the results that the wmt method should be used in the area near the vertical, while the phase difference method in slant beams and a rule has been given to select among those two methods according to the " effect value " on condition the depth is known for the consideration of improving the measurement precision, this paper studies the factors which affect the toa measurements, and three expressions of precision has been introduced as to applications of phase difference method, this paper introduces an automatic hunting method based on amplitude power to get the range of echo arrival
採用方差分析的方法，使用重復海試數據對wmt法和相位差法的優劣進行了分析，指出了垂直附近應該使用wmt法，而傾斜波束應該使用相位差法；給出了在深度真實值已知前提下wmt法和相位差法使用的判決準則，即根據效應值的大小來選擇。本文從提高測量精度角度出發，分析並驗證了影響toa測量精度的因素；給出了三種精度表示。在應用相位差法時，引入了一種基於幅度能量的區間自動搜索方法；實驗表明該方法能很好地確定回波到達的大概時間范圍。Thus, the moving target tracking is a lot subject combining with knowledge of the digital signal processing, the image processing, pattern recognition, artificial intelligence and etc. at first, the automatic detection method of moving target is studied, and the background image ascertaining method based on the character matching is proposed
因此，運動目標跟蹤是一個多學科交叉的研究方向，它融合了數字信號處理、圖像處理、模式識別的知識。本文首先研究了運動目標的自動檢測方法，提出了基於特徵匹配的背景提取法，並利用背景差法實現了運動目標檢測和提取。分享友人