selection ratio 中文意思是什麼
selection ratio
解釋
選擇比率-
In the sub block circuit design, the contents that the author had introduced include : the principle of band gap voltage reference and the design technique in low power supply ; the analysis of spike pulse noise rejection, frequency divider and dead time in oscillator and control circuit ; the selection of the width and length ratio of four switches and 2x / 1x mode change point in driver and mode selection circuits
在子電路設計中，作者比較深入分析的內容有:基準電路的原理及低電源電壓下基準電路的設計;振蕩器和控制電路中尖峰脈沖噪聲抑制、兩分頻電路及死區時間設定;驅動及模式選擇電路中開關管的寬長比的選擇及模式轉換點的設計。 -
A drum drying & forming test - bed as its main facility, and the principle and characteristic of vegetable paper foods drum drying and forming in the condition of new type applicator and feeding system are introduced, and the stuff base selection and the stuff ratio of greengrocery paper food ' s drum forming are studied. a new thought for the forming of vegetable paper food is provided
以自制滾筒乾燥試驗臺為主要研究對象，探討了在新型布料方式下蔬菜紙形食品滾筒乾燥成形的原理及特點，並研究了蔬菜紙形食品滾筒成形工藝中基料的選擇及料漿的調配，為蔬菜紙形食品的成形提供了一種新的思路。 -
The flow behavior of resin, water outlet structure at bottom of the mixed bed, water inlet position of hydraulic transportation, water intake ratio, and pneumatic transportation etc. have been analysed, giving out optimal selection of them combined with reality in the field
對樹脂的流動性能、混床底部出水結構、水力輸送進水位置、進水比例以及氣力輸送等進行了分析，並結合實際給出了最佳選擇。 -
Specially, based on risk - metric and factor variables, the author discusses multi - factor asset pricing model. in theoretical analysis, the author attempts to release the assumption of index ' s random walk, proves a portfolio selection model suitable for the linear index level moreover, based on assets un - exchangeable, the author brings forward asset pricing models for b - shares, h - shares and non - circulated - shares. the author also brings forward multi - factor asset pricing model based on risk - metric indices, such as coefficient of beta, standard variance, standard semi - variance, average absolute deviation, value at risk, and factor variables, such as circulated market equity, exchange ratio, short - term historical return
在理論分析時，作者嘗試放鬆指數水平滿足隨機遊走過程的假設，推導出指數水平呈線性趨勢的資產組合選擇模型；此外，作者基於資產不可交易這一假設，提出了b股、 h股和非流通股等情形的資產定價模型，並基於系數、標準差、標準半方差、平均絕對離差和風險價值等風險度量指標以及流通市值、換手率、短期歷史收益率等因素變量提出了四因素資產定價模型。 -
Abstract : this thesis discusses the process and operational management of the 600 mw condenser cooling water systems at high concentration ratio in respect of chemicals selection and dosage
文摘:主要從循環水處理藥劑的篩選及其加藥量，來討論目前600mw機組高濃縮倍率下循環水處理的途徑及運行管理。 -
This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance, co - variance and path coefficient analysis, to determine broad - sense heritability, and to estimate genetic advance under selection. the genotypes showed significant difference for all traits, except for percentage of normal seedling. genetic correlation between conversion efficiency of seed reserve, electrical conductivity with other traits were not significant, showed that selection for any of them might be possible without hampering any other traits. however path coefficient analysis indicated that conversion efficiency of seed reserve, seed reserve utilization ratio have strong direct effect in affecting seedling weight, and that mean germination time has significantly negatively correlated in affecting gi. moderate to high estimates of broad - sense heritability, genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity, germination index, mean germination time, seed dry weigh, seedling dry weigh, seed reserve depletion ratio indicating the possibility for improving these traits
本研究利用12個普通小麥品種對10個種子活力性狀的遺傳變異和相關研究，表明除正常幼苗百分率外，其餘種子活力性狀在品種間均存在顯著的差異.種子貯藏物質轉換效率、電導率兩個性狀間及與其它性狀均無顯著的遺傳相關，因此對他們的選擇不會影響到其它性狀.通徑分析表明幼苗干重主要取決于種子貯藏物質轉換效率、種子貯藏物質利用速率;發芽指數主要由平均發芽時間決定.電導率、發芽勢、幼苗干重、種子干重、發芽指數、種子貯藏物質消耗比率6個性狀表現中到高的遺傳力、遺傳變異系數和相對遺傳進展，指明通過遺傳育種手段改良這些性狀是可能的 -
This paper constructed a new index : risk - return tradeoff ratio ( rrtr ), for portfolio selection, based on a premise that the reason of investors bearing the risks is to gain the super returns
本文根據投資者冒風險是為了獲得超過無風險收益的超額收益這一基本假定，構造了風險收益抵換率這一指標作為投資者進行資產選擇的基礎。 -
Ssmapkk transformations were screened on media with kanamycin ( 30mg / l ). nineteen individual kanamycin resistant plants were obtained. t2 plants were checked for integration of foreign gene by counting ratio of the number of tolerant plants to the number of non - tolerant plants on selection medium with kanamycin ( 30mg / l )
將ssvp和ssmapkk的全長cdna分別克隆入植物表達載體pcambia1300和prok中，導入根瘤農桿菌gv3101后，由花浸泡法進行擬南芥遺傳轉化，轉化ssvp鹽地堿蓬ssop和ssmapkk基因的克隆與功能鑒定的擬南芥在含潮黴素（ 25mg ）的ms培養基上篩選，獲得t ；代轉基因植株。 -
Features of dr1600 include automatic selection of both the correct reduction ratio and the proper focus
Dr1600一大特點是能夠自動選擇正確的縮圖比例及準確的焦距。 -
This paper illustrates detailedly the thin groupware auto - adaptive recognition system ; it also illlustrates the procession of capture image and take indispensable foreclose to wipe off noise in order to get boundary easilyer. the recognition system uses " hough " transform method to make the recognition area orientation, and according to the unstable environment such as lights which leads to the change of the image ' s brightness, thresholds picture using an iterative selection method and then growing process for cell image segmentation based on local color similarity and global shape criteria, adaptively gets the best threshold to divide the washer off the background. the recognition system uses the classifier based on minimal - error - ratio bayes method to make decision after getting image characteristic
本文詳細介紹了薄形組合件自適應識別系統；闡明了圖像的分通道自動採集過程，以及對採集到的原始圖像所進行的預處理方法。通過採用哈夫變換去除偽邊緣點的方法，有效地解決了識別區域的定位問題。針對裝配零件（主要是墊片）薄、小導致圖像信息少、識別難度大，以及材質不一導致採集到的組合件圖像亮度波動等問題，提出了使用最佳閾值迭代法和使用種子填充的圖像串列分割技術，自適應地找出最佳閡值，使墊片和背景分離，從而提取墊片數目信息。 -
Abstract : the key of improving punching accuracy and utilization ratio of material will be proper selection and design of positioning system and devices of feeding of punching die
文摘:正確選擇與合理設計沖模送進條（帶）料及半成品的定位機構與裝置是提高沖壓精度和材料利用率的關鍵環節。 -
Then navigation asteroids are selected under a integral evaluation, the planning of the photoing sequence is handled with an improved genetic algorithm, along with a difference selection method which optimizes the ratio of navigation evaluation to resource consumption. a single axis randomized expanding algorithm is proposed to solve the large angle slew maneuvers planning problem. this algorithm randomly produces
對于自主探測器大角度機動規劃問題，本文提出單軸隨機擴展演算法，單軸隨機演算法在生成隨機節點過程中充分利用鄰近點的信息，把規劃問題構造空間的維數由3減少到2 ，從而減少問題求解的搜索空間，最後利用前向搜索的方法對規劃路徑進行優化。 -
The effect of amorphous hydrated ruo _ 2 power production is discussed here, including : selection and ratio of solvent, selection and concentration of precipitator, terminal ph of titration and anneal temperature and time of colloid. research indicated that terminal ph and anneal temperature are the most important influence factors on physical and electrochemical properties of amorphous hydrated ruo _ 2 power
討論了超細氧化釕粉體的制備影響因素，包括:溶劑選擇和配比、沉澱劑選擇和濃度、滴定終點ph值以及焙燒溫度和時間對氧化釕粉體粒度分佈及電化學的影響，研究表明:沉澱終點ph值以及膠體焙燒溫度對粉體物理和電化學性能影響較大。 -
An example demonstrates the feasibility of this method. we also study the design of mean selection based on the minimum loss using taguchi. g method, present the concepts of the ratio of quality loss and effective off - center. at last we explore the design of mean selection based on the maximum profit in the process of bin packing and improve the old model
應用田口的質量損失理論，我們研究了基於損失最小的過程均值設計問題，提出了質量損失率及過程有效偏移的概念；然後以裝罐過程為例，探討了基於利潤最大化的過程均值設計，並改進了原有的裝罐模型。 -
The main part and key technique of the cpa system is study : the generation of the femtosecond laser pulse is study, the modulation and maintenance of the ti : s laser is learned ; the types of the measurement for ultrashort laser pulse is generalized and the interferometric autocorrelation is expatiated ; the varieties of the stretchers is sum up and aberration - free stretcher is calculated and optimized to improve the stretching ratio ; the pulse selection is analyzed and a single pulse can be selected successful from the pulse train at a repetition rate of 82mhz ; the kinds of the amplifier in cpa system is gathered up, the eight - pass pre - amplifier and a good many effects in it is investigated. finally, the second, third and fourth - order dispersions in cpa system is analyzed systemicly, and the according means for dispersion compensation is worked out
對cpa系統的主要環節及關鍵技術進行了研究：掌握了鈦寶石激光器的調節和維護技術，較深入地研究了飛秒激光脈沖產生的機理，其中對群速色散、自相位調制、自鎖模等問題進行了詳盡的分析；總結了超短激光脈沖的測量技術，重點研究了干涉自相關測量法；在總結展寬器類型的基礎上，對無象差展寬器進行了理論計算、優化設計，提高了展寬倍數；深入論述了脈沖列的選單問題，熟練掌握了脈沖選單技術。 -
According to the raman selection rule and the pl measurement, it is reasonable to evaluate the quality of galnp / algalnp mqw by analyzing the relative intensity ratio of a1p - lo / to. ( 4 ) a new modified random element isodisplacement ( mrei ) model is set up to calculate the dependence between the long - wavelength optical phonon frequencies and the composition of iii - v - type ab1 - xcx mixed crystals. the second neighbor force constants are still assumed to be a linear variation with the composition, but the two first neighbor force constants can be evaluated to be a negative exponent variation with the composition, using the overlapped repulsive potential of the ion crystal combination
通過實驗我們找到了在這些結構參數上生產gainp algainpmqw的較理想的結果； （ 3 ）首次用喇曼（ raman ）散射方法研究了常溫下的gainp algainp多量子阱結構，除了指認出喇曼光譜中各光學聲子模外，還結合樣品光致發光譜的測量結果，分析發現喇曼光譜中alp - lo to的相對強度比可以在一定程度上評定晶體gainp algainpmqw的生長質量； （ 4 ）在修正的隨機元素等位移? mrei模型的基礎上建立了一個新模型，計算了ab _ （ 1 - x ） c _ x型?族半導體混晶的長波長光學聲子模頻率的組分變化關系。 -
After introduce the main technologies of ac regulation speed, the paper deduces in details the voltage space vector pulse width modulation ( svpwm ) technology and svpwm ' s vector selection of constant ratio of voltage and frequency
本文在介紹了交流調速系統的種種主流技術后，較為詳細地討論了電壓空間矢量脈寬調制（ svpwm ）技術，並對恆壓頻比且為同步調制時的svpwm矢量的選擇，進行了細致地推導。 -
The conjoint affection of ruo _ 2 power on ta foil is also discussed here, including : selection and ratio of adhesive, selection and ratio of conductive agent, temperature and time of heat - press treatment of electrode. research indicated that temperature and time of heat - press treatment of electrode have the most effect on electrochemical properties of as - produced electrode
然後討論了粉體與鉭片基體結合的影響因素，包括:粘合劑的選擇和比例、導電劑的選擇和比例、熱壓溫度和時間對電極片的電化學性能的影響，研究表明:熱壓溫度和時間對電極片電化學性能影響較大。 -
In chapter 2, research on principles of exergy anaiysis in air - conditioning lead to a new selection of dead - state and proper evaluation of air - conditioning process with exergy effectiveness and exergy efficiency ratio. the conversion of available energy in different evaporative cooling processes is analyzed and evaluated in chapter 3. as results, exergy of moist air is suggested to be evaporative cooling potential and regenerative evaporative cooling will be most potential in effectively utilizing the available energy
第三章對蒸發冷卻過程能量及有用能轉換關系進行了研究，闡明了濕空氣（火用）作為蒸發冷卻潛力的合理性，對蒸發冷卻方案的（火用）分析評價指出了各種蒸發冷卻方式的適用性與合理的使用原則以及提高蒸發冷卻過程有用能利用率的發展方向。 -
They proposed that a higher ratio of non - synonymous to synonymous mutations, compared with that expected by chance, would be the result of positive selection, and would therefore point to the presence of driver mutations
與隨機期望對比，他們推薦非同義與同義之比更高的比率，會是陽性選擇的結果，因此成為驅動突變存在的界點。
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