早熟

Traditional GEP Algorithm may leads to prematurity by local optimum trap . In order to solve the premature convergence problem, this paper proposes a novel GEP method based on backtracking referring to the atavism in the biosphere.

传统GEP可能陷入局部最优的"早熟"陷阱，为解决基因表达式编程中的未成熟收敛问题，本文借鉴生物界的"返祖现象"，提出了基于回溯的基因表达式编程方法，有效地改善了传统算法在进化过程中的早熟现象。

Based on present work of genetic algorithms, the arising process of incest and premature convergence is discussed. The operating efficiency of genetic algorithms is analyzed from different view of points, and the conclusion is drawn from the analysis that there exists a lot of caducous operation during the evolution in the case of premature convergence.

在遗传算法现有研究成果的基础上，讨论了近亲繁殖和早熟收敛的产生过程，并从不同角度对遗传算法的操作效率进行了分析，得出在早熟收敛的情况下遗传操作存在大量无效操作的结论； 3。

After the analysis of morphological variation of P.pratensis is SYRRL,it can be divided by three types:Jiuzhi type,Dari type and Maqin type.

对三江源区草地早熟禾种群形态差异的分析，可将5个地区的草地早熟禾分为久治型、达日型和玛沁型。

The anti-oxidant enzymes including SOD, POD and CAT and MDA, which is one of the oxidant products, and IAA and ABA, which were relative to earliness but not to decrepitation of the short-season upland cotton, were studied.

为解决棉花育种中普遍存在的早熟早衰问题，研究了与短季棉早熟不早衰有关的抗氧化系统酶包括超氧化物岐化酶SOD、过氧化物酶POD 和过氧化氢酶CAT，氧化产物之一丙二醛性MDA，以及生长素IAA 和脱落酸ABA在不同类型短季棉品种中不同生长发育时期的变化规律和遗传特性。

Using histological staining methods, SABC immunocytochemical technique and electron microscope technique, the difference of the encephalon, the pituitary and the gonad in precocious and unprecocious large yellow croakers are compared.

本文应用组织学、免疫细胞化学及电子显微镜技术对一龄性早熟和未早熟大黄鱼的脑和脑垂体以及性腺进行了比较研究，结果表明： 1。

Criticized for creating a family with four precocious children and for writing in a style that drew attention to itself, he proceeded to create a family with seven precocious children, and to produce, in "Zooey" and "Seymour," works of supreme literary exhibitionism.

媒体批评他制造了一家四个早熟儿童，写作风格也好像故意要引人注目。而塞林格反倒变本加厉，继而创造了一家七个早熟儿童的形象，即《佐伊》和《西摩》，把文学中的表现欲发挥到了极致。

All the above facts revealed that obtained the precocious line of Eimeria tenella with genetical stability through selection.

提示通过早熟选育得到了遗传相对稳定的柔嫩艾美耳球虫早熟系。

Precocious Shanxi strain ( E.tenella SX010323) was developed via the method founded by Jeffers, and the corresponding endogenous development stages, pathogenicity, reproductive potential, immunogenicity and stability were observed and detected.

运用Jeffers建立的早熟系选育方法对柔嫩艾美耳球虫山西株( E.tenella SX010323)进行早熟选育，并对其内生发育、致病性、繁殖力、免疫原性、稳定性进行观察和检测。

Humbert Humbert: What drives me insane is the twofold nature of this nymphet, of every nymphet perhaps, this mixture in my Lolita of tender, dreamy childishness and a kind of eerie vulgarity.

汉伯特：最让我发狂的是这个早熟少女，也许可以说是每个早熟少女的双重本质，也就是我的罗莉塔同时带有的温柔又梦幻的孩子气，又有点教人不太舒服的粗俗。

Mycorrhizal spores in most rhizospheric soil of weed species, except Vida cracca, TrfoHum npens and Oxalis cornculata, decreased significantly. 2 Influence of coexisting of various plant species on AMF colonization in Pb polluted soil Comparing with monoculture,the results showed mat diversity did not affect on die AMF colonization of weed plants planted in soil at the concentration (334.5251mg/kgsoil or nonpolluted soilsignificandy.In the experiment of species combination with Trfolium repens, Lolium perenne, Poa annua, Plan tago virginica, the infection rate of all species increased in Pb treatment except Poa annua, implying that diversified plant species coexistence may alleviate the impacts of Pb on mycorrhizal colonization.

铅污染土壤条件下不同植物物种互作对菌根的影响通过盆栽加铅模拟试验，在铅污染(334.5251mg／kg土)的土壤中，黑麦草、早熟禾、白车轴草和北美车前无论是对照还是铅处理，多植物物种共存组合中的杂草菌根侵染率与单个物种相差不大，AMF菌根侵染率的处理间差异的变化趋势在铅污染的土壤和对照土壤条件下表现一致，但铅处理与对照相比，除了早熟禾外，菌根侵染率均升高，说明杂草多样性对菌根有一定的保护作用。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。