查询词典 evolution

In order to preserve the varieties of the swarm and avoid to be in premature convergence,a Particle Swarm Optimization algorithm based on the differential evolution mutation is proposed.The new algorithm uses the particle aggregation quality to judge that if the particles in the swarm are congregative so much,then apply the differential evolution to mutate the self prevenient best position of each particle,in order to realize the aim of preserving the varieties of the swarm.

为了保持粒子种群的多样性而避免发生&早熟&的问题，提出一种基于差异演化变异的粒子群优化算法，该方法通过粒子聚集性判断如果粒子群中的粒子过于聚集，则使用差异演化算法对PSO算法中各个粒子的自身历史最佳位置进行变异，以实现保持粒子群种群多样性的目的。

The evolution of orogenic zone,gold ore-formation and its dynamic mechanism are studied and the new viewpoint is put forward that thermal stress is a main controlling factor in metamorphism,formation ,evolution of structure and ore-forming geodynamic environment. The critical condition of fluid convection in porous equal medium and the new conclusion is reached first that the thickness of structural layer and temperature gradient are main factors influencing fluid convection andtransport of ore-forming matters in additional to physical properties of rocks. According to the conclusion some mechanisms such as the transform from compressive type to tensile one of erogenic zone,transport and accumulation of ore-forming matters such as gold and so on and many ore-forming temperature values are interpreted qualitatively.

探讨了区内造山带演化、金成矿及其动力学机理，提出了热应力是影响变质作用、构造形成演化及成矿地球动力学环境的主控因素的新认识；对多孔均匀介质中流体对流的临界条件进行探讨，首次提出了除岩石物理性质外，构造层厚度和温度梯度是影响流体对流乃至矿质输运的主要因素。

This paper summarizes various structural models, structural belts, Cenozoic deformation frameworks and tectonic evolution concerning intraplate deformation in the West Kunlun - Pamir Cenozoic erogenic belt and Southwest Tarim foreland basin and suggests that the Cenozoic intraplate deformation be characterized by segmentation and stage evolution.

笔者总结了西昆仑—帕米尔造山带及塔西南前陆盆地板内变形的各类构造模式、构造分带、新生代变形格局及构造演化，提出其新生代板内变形具有弧形构造分段性和阶段性演化的特点，发现了依格孜牙、柯克亚、桑株—杜瓦、卡兹克—阿尔特薄皮弧形推覆构造、齐姆根主弧形构造段及玉力群—克里阳构造段的三角带构造及叶尔羌—棋盘对冲过渡型弧形构造。

It introduces four stages of the evolution process and the evolutive traits, and discusses the reasons of the evolution.

主要论述了我国零售业态演进的四个阶段和我国零售业态演进的特点，同时论述了我国零售业态演进的原因。

This paper discusses the distribution type,characteristics and homogenization temperature of fluid inclusion in reservoir systematically on the basis of analyzing the tectonic evolution of Yancheng Depression,the trap formation and evolution of Zhujiadun structure and the genetic and expulsive characteristics of main source rock in Yancheng Depression.

在分析盐城凹陷构造演化史、朱家墩构造圈闭发育史和盐城凹陷主力烃源岩生、排烃特征的基础上，系统研究了朱家墩气藏K2t储层流体包裹体类型、分布特征和均一温度。

This course systematically describes the structure and function, transmission, expression and regulation, and evolution of genetic materials, covering basis of cytology for inheritance, molecular basis of genetic materials, Mendel's principles of inheritance, linkage and sex linkage, genemutation, variations in chromosome structure and number, quantitative genetics, inbreeding and heterosis, inheritance of bacteria and viruses, extranuclear inheritance, gene engineering, genomics, gene expression and regulation, developmental genetics, population genetics and evolution.

本课程全面系统地介绍遗传物质的结构与功能、遗传物质的传递、遗传物质的表达与调控、遗传物质的进化等，包括遗传的细胞学基础、遗传物质的分子基础、孟德尔遗传、连锁遗传和性连锁、基因突变、染色体结构变异、染色体数目变异、数量性状的遗传、近亲繁殖和杂种优势、细菌和病毒的遗传、细胞质遗传、基因工程、基因组学、基因表达的调控、遗传与发育、群体遗传与进化。

CASA concerns with origin, distribution and evolution of life in the Universe, such as search for extrasolar planets, origin, structure, and evolution of planetary systems, search for life under extreme conditions, and effects of ionizing radiation on organic and inorganic molecules so on.

该中心主要关注宇宙生命的起源，分布和演化的研究，比如搜索太阳以外行星，行星系统的起源、结构和演化，探索极地条件下的生命，以及离子辐射对有机和无机分子的影响等。

Luoyang-Yichuan basin is a multicycle superimposed continental sedimentary basin in middle Cenozoic, east of China. The basin has gone through such evolution stages as craton passive continental margin basin in Pre Mesozoic, depression basin in early Mesozoic, foredeep basin in late Mesozoic and fault depression basin in Cenozoic, etc. The Tectonic evolution of the basin is characterized by obvious multicycle superposition and multi-tectonism.

洛阳—伊川盆地是中国东部中新生代叠合多旋回陆相沉积盆地，其形成主要经历了前中生代克拉通被动大陆边缘盆地、早中生代坳陷盆地、晚中生代前渊盆地和新生代断陷—坳陷盆地等演化阶段，构造演化具有明显的多期次叠合，多构造作用的特点。

Besides, there still have never been reported about the situation of wild species originated from China in evolution of strawberry, research on cytogenetics of hybrids from the cross of wild species originated from China with cultivars of Fragaria will also be helpful for understand the relationship between wild species and cultivars and strawberry origin and evolution.

另一方面，原产我国草莓资源在草莓属进化中的作用至今尚未见报道，通过种间杂交及细胞遗传学研究可有助于探明草莓种质间的亲缘关系，为了解草莓的起源和进化提供参考。

As the direct product of magmatism during the process of tectonic evolution, volcanic rocks are the important clue in discussing the geological events and geodynamic evolution.

火山岩是大地构造演化过程中岩浆作用的直接产物，是探讨地质事件和地球动力学演化的重要线索。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。