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prematurity n.1.早熟(性);不成熟。2.不到期;過早,時機未成熟...

premaxilla

The results showed that there is no significant difference between children of adolescent mothers and of adult mothers in terms of the prevalence of prematurity and congenital diseases , but the children of teenage mothers have a significantly higher prevalence of low birth weight ( adjusted odds ratio = 1 . 61 , 95 % ci = 1 . 21 - 2 . 80 ) than those of compared mothers 本研究以臺中市1997年初產青少女線親及基嬰兒為對象,結果顯示;兩組在早產兒及先天性疾病的比率方面沒有差異,但低出生體重方面,青少女母親組之勝算比為正常育齡母親組的1 . 61倍( 95 % c . i . = 1 . 21 - 2 . 80 ) 。

At first , this paper in detailed analyzes the basic theory of entire searching optimized answer based genetic algorithm . aim at gene evolvement limitation of traditional genetic algorithm , this paper presents a modified genetic algorithm which on the one hand adaptively rectifies crossover and mutation probability to improve gene evolvement effect , on the other hand applies chaos sequence to regularly disorder initialization of gene . after adopting these two methods , the occurrence of prematurity phenomenal is overcome 首先,本文詳細分析了遺傳算法進行全局搜索的基本原理之后,考慮到遺傳算法在種群進化質量方面的局限性,一方面自適應地調整交叉變異概率的方法來提高種群進化質量,另一方面提出了利用混沌序列的內部有規律性對種群的初始值進行變化,這兩種措施的提出克服了遺傳算法的“早熟“現象的出現,并且仿真實驗驗證了此混沌遺傳算法的有效性。

Simultaneously , for preventing prematurity , crossover positions in crossover operator choose according to not equal probability . when bringing into new genes , reverse bit binary strings those have the same number as the optimal individuals are supplied , which settles gene absence problem reproduction results in 同時為了防止早熟現象,交叉算子中的交叉位置按非等概率選取的方法進行;在納入新的基因時,加入與最優個體群等量互補的二進制碼串,解決了復制操作導致基因缺失的問題。

Dc has two attractive characteristics : ( 1 ) dc can make genes in a chromosome keep good diversity . dc overcomes the evil of traditional crossovers , which cause gas get into prematurity . ( 2 ) dc well reduces algorithms “ generations by guiding them to search in global optimal ' s neighborhood space 通過對交叉算子產生新個體的機理以及實際問題的特征進行分析后,本文提出一種基于非等位基因交叉運算的錯位交叉算子,該算子的主要優點在于: ( 1 )能夠使種群個體的基因值更加有效地保持多樣性,克服傳統交叉算子下算法易于陷入局部最優解的缺陷; ( 2 )引導遺傳算法在最優解鄰域內搜索,從而提高算法的優化速度。

After briefly introduce the basic genetic algorithm ( ga ) theory , aimming at the “ prematurity “ of basic genetic algorithm , we put forward a new improved genetic algorithm , the basic genetic algorithm combine simulate anneal ing ( gasa ) , to meliorate the local search ability of basic genetic algorithm . because many design problems , such as the preliminary fuzzy rule and input and output membership fuction are hard to gain and the learni ng process of fuzzy neural network ( fnn ) is slow and local optimization , we design the fuzzy neural network excitation controllers of turbine generators with genetic algorithm combine simulate anneal ing ( gasa ) 本文首先介紹了水輪發電機勵磁控制方式和軟計算理論的發展,然后介紹了遺傳算法的基本理論,針對基本遺傳算法存在的“早熟”現象,介紹了一種遺傳算法結合模擬退火的改進型遺傳算法,改善了基本遺傳算法的局部搜索能力。鑒于常規模糊神經神經網絡勵磁控制器設計方法中存在著初始模糊規則和輸入輸出隸屬度函數難以確定以及模糊神經網絡訓練緩慢和難以達到全局最優等問題,利用遺傳算法結合模擬退火的改進型遺傳算法來設計模糊神經網絡勵磁控制器。

The product has various functions , such as : degradation pesticide residue , solid n , solve p , solve k , promote root growth , advance prematurity , economize manure and increase the effect , promote fertilizer land productivity , improve tiny ecosystem circulation and boost production ( 15 - 30 % ) etc 該產品具有降解農藥殘留、固n 、解p 、解k 、促根生長、促早熟、節肥增效、培肥地力、改善微生態循環、增產顯著( 15 ? 30 % )等多種功能。

The basal genetic algorithm bears only cross - over operator and mutation operator which makes it has the weak point in the search ability , thus the prematurity often occur and the result often converge to the vicinity of the real optimal point 基本遺傳算法僅有交叉算子和變異算子,因而局部搜索能力不強,容易出現種群早熟,進化結束時往往收斂到最優點附近而達不到全局最優點。

Scientifically , too , “ there ' s just enormous ignorance “ about even the basics of prematurity ' s causes , added dr . richard behrman , a menlo park , calif . , pediatric specialist who chaired the institute ' s probe 一位在摩洛公園,克里夫為主管協會調查的小兒科執業醫生理查貝曼還說,科學上也是,甚至有關很基礎的早產原因也被忽視,實在是受到極大的忽略。

A modified genetic algorithm is proposed . in the dissertation a different fitness function is constructed and similarity is introduced , which can increase variety of population md avoid prematurity 這樣可以增加群體多樣性,在一定程度上避免早熟現象發生;然后利用改進遺傳算法對圖像進行了分割計算,將目標與背景分割開來。

Our result demonstrate that the birth weight have relations with the severity of rop and cryotherapy is an effective treatment for the active stage ill retinopathy of prematurity 早產兒的出生體重和其視網膜病變的嚴重程度有關且冷凍治療可以抑制活躍性的纖維血管組識之惡化并助其吸收,對于第三期早產兒視網膜病變有治療效果。

Future studies are required to determine the mechanisms for the persistently reduced flows in healthy infants born prematurely , as well as to evaluate the effects of even greater prematurity on lung growth , “ they write 今后的研究需要確定健康早產兒持續性呼氣量減少的機理和估計早產對于肺生長的影響。 ”

This paper aims at the localization of genetic algorithm , summarizes some strategies which may improve the performance of genetic algorithm and avoid the prematurity of genetic algorithm 摘要本文針對遺傳算法進行優化時存在的局限性,總結了提高遺傳算法性能和避免遺傳算法早熟的一些策略。

Management with immediate delivery leads to high neonatal mortality and morbidity rates and prolonged hospitalization in the neonatal intensive care unit because of prematurity 急診分娩會帶來高新生兒死亡率和患病率,并且因早產會延長胎兒在重癥監護病房的住院時間。

Management with immediate deliery leads to high neonatal mortality and morbidity rates and prolonged hospitalization in the neonatal intensie care unit because of prematurity 急診分娩會帶來高新生兒死亡率和患病率,并且因早產會延長胎兒在重癥監護病房的住院時間。

Simulations prove , it saliently solves the “ prematurity “ problem and therefoe has better ability of global searching with the property of stabilization , agility and operating simply 仿真表明,該算法有效的克服了早熟現象,而且算法穩定、靈活,操作簡單。

The baby ' s prematurity led to an intestinal disorder and an infection that overwhelmed her body , and she died just after midnight , the hospital said 早產導致她腸道功能紊亂并身體受到感染。 11日凌晨,在醫院對她進行治療腸穿孔的緊急手術后終因心力衰竭死亡。

However , there are many shortcomings in ga , which should not be neglected . in the early stage , researchers have noticed the problem of ga ' s prematurity 但是遺傳算法中仍然存在許多問題,如建筑塊假設、早熟收斂和進化時間長等問題。

Researchers found no evidence of a link between prematurity , birth weight and the amount of caffeine consumed by mothers - to - be 研究人員發現,準媽媽所攝入的咖啡因量與早產及新生兒出生體重之間并沒有什么關系。

The germinal matrix region is very susceptible to such lesions at this period of development , leading to ivh as a complication of prematurity 在發育期間,生發基質易出現這樣的損害,使得ivh成為早產的并發癥。