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In this thesis, the theories and methods of GA are analyzed in detail , the trend of GA in recent times is briefly discussed. Because of the importance of image segmentation, two methods of color image segmentation based on GA are proposed. One is the surface of thresholds image segment method, the other is entropic threshold method. Two algorithms are realized through VC++ 6.0. After that, we compare the characteristics of two algorithms and prove that GA can be very well applied to solving image optimal problems.

本篇论文比较详细地论述了遗传算法的基本理论、方法，指出了算法的研究现状，由于图象分割的重要性，提出了两种基于遗传算法的彩色图象分割方法，即阈值曲面分割方法和最佳熵阈值分割方法，通过VC++6.0编程得到了实验验证，比较了两种算法的性能，证明遗传算法完全适用于图象的优化问题。

Each pocket-sized case includes two eyeshadow colors, a cream eyeliner, blush, two lipglosses and two brushes-for looks designed to take you from day to night.

每个口袋大小的情况下包括两个眼影颜色，奶油眼线，脸红，两个lipglosses和两个刷子，旨在为期待你每天晚上。

Human skull by two parietal bone, two pieces of frontal bone, two temporal bone and occipital bone and so on.

人的头颅是由两块顶骨、两块额骨、两块颞骨及枕骨等组成。

It has two joysticks, two triggers, two bumper buttons and a bunch of other buttons besides.

那上面有两个游戏杆，两个方向按钮，两个前置按钮还有其它一些按钮。

Seed purity can be tested easily as long as one primer of the last two types by RAPD; as to the first two types primers, two primers from both of them must be employed to test seed purity by RAPD.

利用一个互补型或杂合型的随机引物便可对杂种进行RAPD纯度鉴定，而另两种类型则须两个以上的引物才能得到可靠的鉴定结果。

Six years at Milan, then, for the European Champion coach, who aside from the Scudetto also obtained two second places in Serie A, after two exciting title races decided only on the final matchdays, a third place and two fourth places , the first after coming on when the season had already begun, and the second because of an unjust penalisation.

六年在米兰，成为欧洲冠军教练，同时还得到了两次意甲第二名，在两次榜首的赛派上由几场最终的比赛决定，一个第三，两个第四，第一个赛季开始就成为负担了，第二个是由于不公正的判罚。

Six years at Milan, then, for the European Champion coach, who aside from the Scudetto also obtained two second places in Serie A, after two exciting title races decided only on the final matchdays, a third place and two fourth places , the first after coming on when the season had already begun, and the second because of an unjust penalisation.

欧洲冠军教头在米兰呆了六年，除了获得一次意甲冠军以外，还有两次获得亚军，两次都是在最后一轮决出胜负，一次第三名和两次第四名，第一次是在他半途接手的第一个赛季，而第二次则是由于被罚分。

It respectively constructs quasi projection-separation facet sets of two convex polytopes while their orthogonal projection on the centerline overlap mutually. Afterward it judges the separation of two convex polytopes by confirming non-overlap in orthographic projection on the centerline or by finding out a projection-separation facet from two quasi projection-separation facet sets, otherwise a collision is judged.

该算法通过判断2个凸多面体在中心线上的正投影不相交，或者分别构造它们的准投影分离面集合，并从这2个集合中找到一个投影分离面，来判断2个凸多面体分离；否则，判断为相交。

However, when two maturing oocytes fused and two spindle will form in the big cell, the chromosomes will not intermingle. In the present study, we removed GV from one oocyte and transfer to the perivetelline space of another GV oocyte. After fusion the resulting oocytes which contained two GVs were cultured further in MEM.

在本实验中，我们利用小鼠GV期卵母细胞将一枚卵母细胞的生发泡取出后移至另一未经去核处理的GV期卵母细胞透明带下，经三次电脉冲作用后将融合的含有两个GV的卵母细胞放入MEM成熟培养液中培养，在培养成熟的不同阶段分别收集卵母细胞进行免疫荧光染色观察微管及核的变化。

The new rT joint not only has two rotation axes that intersect at right angle,but also has another rotational degree of freedom which can be used to modify the assembly of other joints.This can change the mobility of the parallel mechanisms that assembled with the new rT joints and leads to two types of metamorphic paralllel mechanisms:In the first type,the mechanism changes its topology by turning the new rT joints in all limbs into different configurations which reconfigures the constraints within the limbs or the assembly of all the limb constraints.This change of mobility is completed by two cases.One is illustrated by a 3PS and a 3C parallel mechanism,by altering the rT joint into different configurations there will produce or reduce local degrees of freedom and thus change the constraits to the moving platform.This qualifies the 3PS and 3C to have variable mobility from 3 through to 6 and from 1 through to 6 respectively.

该铰链除了一般Hooke铰的两个轴线互相垂直相交的旋转自由度外，还增加了一个可以调节该两个轴线之一的姿态的一个旋转自由度，通过此自由度调节该rT铰到不同的装配构型，可以改变用其装配的并联机构的自由度，由此产生两类新型的并联变胞机构：一类是机构的各个支链中都有rT铰，该铰链的不同构型可以改变各支链对运动平台的约束或整个支链组的组合形式而改变机构的自由度状态，3PS和3C属于前者，通过调节rT铰到不同构型可以使其支链产生或消失局部自由度，从而减少或增加支链对运动平台的约束，使得并联变胞机构3PS和3C分别具有自由度从3变到6和从1变到6的能力；3P属于改变支链组组合形式的机构，其rT铰的不同构型将改变整个支链组的几何约束组合，使得并联变胞机构3P可以有三转动、三平动或三平移(来源：ABCded9de论文网www.abclunwen.com)一转动的自由度形式。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。