使变异

A new gene structure is proposed: head+body+tail, which allows the program with necessary complexity and putting some learning mechanism into the search process.② A new homeotic gene structure is proposed, it not only can call for subroutines easily, but also can automatically perform programming.③ The concept of different homeotic gene, a multi-cellular structure is proposed. It can be used to describe the complex multi-level programs and to implement the complex subroutine calls.④ An estimation of distribution operator for guiding search is proposed. It fuses statistic learning mechanism into the search process to accelerate the convergent process and improve the quality of solutions.

提出了一种新的基因结构：头＋身＋尾，使计算机自动设计的程序具有必要的复杂性，又便于引入学习机制；②提出了一种新的同源基因结构，它不仅可实现子程序的调用，还具有很强的编程能力；③提出了异族同源基因的概念：一种多细胞结构，它能描述复杂的多层次程序结构，实现可重用程序的复杂调用；④提出了分布估计变异方法，将统计学习机制融入算法，既提高了算法的收敛速度，又提高了解的质量。

The author present a dissertation of new variety of exhibition architecture in theinformation age including aberrance of conception, advancement of exhibitionmanner and intenerate of space connection to give us the outline of exhibitionarchitecture in the new age.

本文从建筑的本体内容着手，论述了信息时代展览建筑和展示空间的一些新特征。包括概念的变异，展览方式的演进以及空间关系和构成方式的软化。从而使我们能够对信息时代展览建筑的总体形象有一个轮廓性的认识。

It is found that the estimating indexes of heart rate variability of MRR, RMSSD and HRVI etc have different sexual sensitivity. The constant temperature airflow of the simulating natural winds can increase the active level of human's pneumogastric nerves, making human body be flabby, relaxed and comfortable. The result indicates the physiological mechanism of the effect of different winding characteristics on the human thermal comfort.

研究发现MRR、RMSSD和HRVI等心率变异评价指标具有不同的性别敏感性；模拟自然风形式的等温气流吹风作用可提高人体副交感神经的活动水平使人体趋向于松弛、放松、舒适和休息状态，研究结果初步揭示了不同风特性对人体热舒适影响的生理机制。

Resumptively, the construction of new structure will change the third stress field to the fifth stress field in surrounding rock, and bring the safety problem of existing structure and the complexity problem of newly-built structure.

概括地讲，新建结构物的施工会使围岩从原来的三次应力场演变到五次应力场，正是这种应力的演变导致了既有结构和新建结构的受力变异，造成既有侧的安全性和新建侧的复杂性问题。

It is concluded that the noise near 500 Hz has less sthenic effect on the sympathetic nerve than those of the other noise frequencies.

通过对R-R间期的心率变异分析得知，在500Hz附近的噪声使交感神经的兴奋程度小于其他频率的噪声影响。

This paper proposes an Improved Particle Swarm Optimization algorithm.IPSO adopts a new mutation operator and a new method that congregates some neighboring individuals to form multiple sub-populations in order to lead particles to explore new search space.Additionally,this algorithm incorporates a mechanism with a simple and easy penalty function to handle constraint.Thus,this algorithm has strong global exploratory capability and efficiency while being applied to solve nonlinear constrained optimization problems.

提出了一种改进的粒子群算法（Improved Particle Swarm Optimization，IPSO），使用了一种新型的变异策略，并在搜索过程中将部分邻近的个体聚集成核，从而形成多子群引导粒子探测新的搜索区域，采用了简单易行的罚函数约束处理机制，使算法在求解较难的非线性约束优化问题时具有很强的全局搜索能力与效率。

The mutation and the screening of the original fungus were carried out by the ultraviolet radiation method to obtain a mutant species UV-A that can depredated the crude protein in the rape cake to 15.46%,which is 1.4 times that of the original fungus.

采用紫外照射法对原始菌株进行诱变和筛选，得到一株降解饼粕中粗蛋白能力较强的变异菌株UV -A ，能使饼粕中粗蛋白的含量降到15 。4 6 %，是原始菌株的1.4倍。

A second bug experienced a mutation that allowed it to make use of the acetate excreted from the first.

第二个细菌经历的变异使它能够利用第一个细菌分泌出来的酸。

A second bug experienced a mutation that allowed it to make use of the acetate excreted from the first.

第二个细菌经历的变异使它能够利用第一个细菌分泌出来的乙酸酯。

The scientists identified a protein that inactivates the flu virus before it can mutate.

科学家发现一种蛋白质，在流感病毒变异之前能使病毒失活。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。