genetic ratio 中文意思是什麼
genetic ratio
解釋
遺傳比例-
The method proposed in this thesis do well in solving the problems of multi - damping - ratio - spectra simulation. it is convenient to obtain the pareto optimal solution set of the multi - object question by using implicit parallel genetic algorithms and the method can meet the practical needs for simulating ground motions coinciding with multi - damping - ratio - spectra in seismic design. the crossing rate and variance rate are important parameters of genetic algorithms which affect the rate of convergence, the adapting rate of cross and variation in this paper can auto - adapt and according to stand or fall of current sample, it assures the sample approach to the pareto optimal solution set in fast convergent speed
較好地解決多阻尼比反應譜擬合問題；本文方法通過一次運行就能獲得一組具有集系特性的地震動，在擬合多阻尼比反應譜的人造地震波集系的模擬方面有傳統方法所不能比擬的優勢，產生的人造波或人造波集系可滿足工程抗震設計需要；在遺傳演算法中，交叉概率和變異概率是影響收斂速度的重要參數，本文採用的改進自適應交叉概率和變異概率，可以根據當前樣本的好壞程度來自動地選擇適當的交叉概率和變異概率，以保證演算法始終以較好的速度向pareto最優解集逼近。 -
This dissertation deals with the content - based image retrieval ( cbir ) theory and technique ; some new features and tools for more concisely and discriminatingly charactering the content of an image are proposed, such as region - based color histogram, grey - primitive co - occurrence matrix, ratio of centripetal moment, ratio of eccentric moment and ratio of inertial moment. a new modified genetic algorithm is also described in this dissertation, which can upgrade the performance of standard genetic algorithm ( sga ) while used in image segmentation
本文以圖像數據庫檢索為主線，討論了基於視覺內容的圖像檢索方法，提出包括基於區域顏色直方圖、灰度?基元共生矩陣及向心矩比、偏心矩比、慣性矩比的特徵描述方式；對遺傳演算法存在的早熟、收斂到最優解慢等問題提出了解決方法，並將改進遺傳演算法應用到圖像分割中，編制了相應程序。 -
A. thalianas were respectively introduced by ion beam with a collection of donor dna having a gradient genetic relation with a. thaliana. in vegetative phase of tl, the ratio of phenotypic variation showed no distinct difference among these transformed populations
用離子束介導與擬南芥菜親緣關系從近到遠一系列的外源供體的全dna轉化擬南芥菜，在轉化當代營養生長期，各轉化群體的表型變異情況沒有明顯的差別。 -
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 -
In reproductive phase, however, the ratio of low - fertility plants first increased then decreased as genetic relation between exogenous donors and a. thaliana reduced
但在生殖生長階段，低育性株率的變化隨著親緣關系的從近到遠呈現出一種先升高再降低的變化趨勢。 -
Increased ratio of reducing sugar to soluble nitrogen is associated with genetic resistance of peas to acyrthosiphom pisum.
還原糖與可溶氮比率的增加同豌豆蚜蟲的遺傳抗性有關。 -
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。 -
A novel method of content - based image segmentation using deformable template matching is proposed. a two - dimensional ( 2 - d ) deformable template based on orthogonal curves is built by pre - computing extensions of the deformable template along orthogonal curves and sampling the curves uniformly. then the definitions of internal and external energy functions are given according to the image segmentation problem, and genetic algorithm is used to obtain globally optimal solutions. the proposed method uses a lower - dimensional search space than conventional methods and reduces the sensitivity of the algorithm to initial placement of the template. experiments on real - world images and in simulations at low signal - to - noise ratio show the robustness and good performance of the method
本文提出一種採用可變形模板匹配技術進行基於內容的圖像分割演算法.通過預先計算出可變形模板沿著變形的正交曲線，並對模板曲線及正交曲線進行離散抽樣，建立一基於正交曲線的二維（ 2 - d ）可變形模板，針對圖像分割問題定義控制可變形模板進行變形的內、外部能量函數，本文採用遺傳演算法搜索能量函數最小的全局最優解.該新演算法比傳統的可變形模板匹配方法降低了搜索空間的維數，減少了演算法對模板初始位置的敏感.對實際圖像及模擬低信噪比圖像處理的結果表明，新演算法具有良好的分割精度及穩定性 -
The average transition : transversion ratio was 1. 0 which indicated the genetic differentiation was great. the ration was 2 in nuclear dna gene. as a rule the ts : tv ratio decreased with the increasing genetic distance
1數據分析軟體，構建蚜總科蚜蟲分子系統樹，探討這些類群這間的分類地位和親緣關系，這在國內外尚屬首次。 -
Obviously, the artificial ground motions used for structural time history analysis should well coincide with multi - damping - ratio - spectra. based on the comparison of the conventional algorithms for multi - objective optimization and genetic algorithms, a method for the simulation of multi - damping - ratio - spectra is proposed in the thesis which combines the multi - objective optimization algorithms and genetic algorithms. the program corresponding to the method is also developed and the method is proved to be feasible and convenient by an example at the end of the thesis
本文通過分析多目標優化問題的解的意義和常用解法，在比較現有的幾種常用優化演算法的基礎上，選用遺傳演算法這種自適應全局優化概率搜尋演算法作為本文的搜尋方法，將其與多目標優化理論有機地結合在一起，形成多目標遺傳演算法，並將其引入地震動模擬，形成基於遺傳演算法擬合多阻尼比反應譜的地震動模擬程序。 -
One to offspring ( t1 ) was selected for further genetic analysis from two types of self - pollinated transgenic plants and screened for the presence of the recombinant gene by the pcr respectively. the result suggested that the resistance to kanamycin can be a stable heredity by genetic analysis, separation ratio of t1 was 3 : 1 and t1 kanamycin - resistant tomato plants can carry vp7 gene
此外，從兩種轉基因植株中分別選取一自交株進行t _ 1代遺傳分析，其kan抗性基因分離比皆為3 : 1 ， t _ 1代抗性番茄植株的pcr結果也呈陽性。 -
This paper focuses on the following research work : 1. proposes a genetic algorithm based on matrix encoding for next hop route with load and time delay ; 2. proposes a genetic algorithm for shortest route via designated node, solves the problem which dijkastra algorithm need two times or more to compute ; 3. proposes a scheme of dividing populations and dividing time in order to improve the success ratio ; 4. proposes a network model for directional motion, performs evaluation for mobile ip based on wlan, and concludes some useful results
提出了解決移動ip中過指定點的路由的遺傳演算法，解決了dijkstra演算法需要分次計算的問題，通過記錄遺傳演算法的疊代結果還可以給出次優解路由； 3引入了分群和分周期的操作策略，對過指點最短路由的遺傳演算法進行了改進，模擬分析表明使用該遺傳演算法求解過指定點的路由獲得了比inagaki演算法更高的成功率； 4 -
Subsequently, a mathematic model to maximize the ratio between the overall utility and cost from both customers and manufacturers perspectives is formulated, and a genetic algorithm is adopted to solve this combinatory optimization problem
在此基礎上，同時考慮大批量定製產品的質量效用和成本，以「效費比」最大為目標，建立了產品優化配置數學模型，並採用遺傳演算法對其進行求解，從而達到了顧客滿意度和成本之間的平衡最優配置方案。 -
Composite laminate shells have been applied more and more widely in aerospace structures. in order to increase thrust to weight ratio and improve the comprehensive performance of airplane, optimization design must be carried out. this thesis brings forward utilizing the method of aga - fem, which combines adaptive genetic algorithm ( aga ) and finite element method ( fem ), to optimize fibre - reinforced composite shells
本文提出採用自適應遺傳演算法（ adaptivegeneticalgorithm ）和有限元方法（ finiteelementmethod ， fem ）結合即aga - fem方法進行纖維增強型復合材料層合殼結構的優化設計，並對某航空發動機復合材料機匣進行優化設計分析，取得了很好的效果。 -
Similarity coefficient and genetic distances between two arbitrary individuals were caculated according to the data of experiments, the pedigree was constructed by two means ( they were upgma and parsimony ), and genetic diversity was discussedbased on selecting the best conditions of pcr with opg and opa primers from operon company, we obtained 163 bands using 24 random primers. in other words, 163 sites in crested ibis " genome were detected. the bands from 23 primers showed polymorphism. minimurn of polymorphic ratio was 0, maximum was 85. 71 %, and average was 48. 99 %. in the population which was composed by 37 individuals, most of genetic distances between two arbitrary individuals were less than 0. 1. the results showed that the degree of similarity among crested ibises was high while genetic diversity in the population was low accordingly
我們在對operon公司opg系列和opa系列引物進行優化篩選的基礎上，用24條隨機引物共擴增出163條譜帶，即檢測了朱?基因組中的163個位點，其中23條引物的擴增結果具有多態性；譜帶的多態比率最小為0 ，最大為85 . 71 ，平均為48 . 99 ；在由37隻朱?組成的種群中，任意兩個個體之間的遺傳距離絕大多數在0 . 1以下。這些結果表明，目前朱?個體間的相似程度很高，種群的遺傳多樣性水平較低。 -
The fusion - experiment may be predigested before protaplast - fusion, it can simplify the fusion orperation, and enable the genetic substance single - direction tranfer. the fusion ratio is 0. 403 %, this means the fusion was successd but more optimal condtions need further study
採用滅活原生質體融合技術，既簡化了實驗，又實現了遺傳物質單向傳遞。實驗結果，原生質體融合率為0 . 403 ，可深入研究提高融合率的條件。 -
The ratio of right predictive number of positive sample to wrong predictive number of positive sample is used as the fitness of the improved genetic algorithm, because the positive sample is dramatically small with high unbalanced distribution in practical binary classification
針對現實的二值分類中正向樣本數極少且分佈不平衡的特點，提出利用正確正向分類結果與錯誤正向分類結果的比值作為遺傳演算法的適應度函數。 -
In the procedure of control, pnn studies on - line and gives the signals to fnnc. one of the algorithms to train networks is genetic algorithm which is based on darwinism. to avoid converge ahead of schedule or enter into the super - plane, the ratio of intercross and aberrance is self - adaptive to enhance the efficiency
在神經網路離線訓練時應用了基於達爾文進化論的遺傳演算法，為了解決一般遺傳演算法的早期收斂和陷入超平面等問題，採取對交叉和變異率自適應調整的方法來提高搜索效率。 -
Based on genetic algorithm, the paper gives a optimization method for the design of spiral bevel gear with high tooth, which reaches the goal of high contact ratio
摘要提出一種基於遺傳演算法的高齒弧齒錐齒輪的優化設計方法，該方法應用於實例計算，取得了比較好的效果，達到了大重合度的設計目標。
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