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Chapiter 2 discusses the theory of assets portfolios, which starts to analyze investor, arid deduces framed investor"s feasible set arid efficient set, discUss different forms and characteristic of efficient portfolio, and systematic analyzes the effect of portfolio, risk diversification, followed briefly summarizes the formation, development, application and limit of the "theory of portfolio, created by Markowitz.

本章从投资者开始分析，给出了框定投资者的可行集和有效集，并讨论了各种不同的有效组合类型及其性质，同时系统研究了资产组合的效应——风险分散，最后简要综述了马柯维茨投资组合理论的产生、发展、应用与局限。

Riding with page stapler, and book and covers cross-nested set after a ride on the wire on the shelves of books and periodicals from the spine creases into the outside by two iron wire set up in a crate clasper is referred to as a horse.

在骑马配页订书机上，把书贴和封面套合后跨骑在订书架上，将铁丝从书刊的书脊折缝外面穿进里面，用两个铁丝钉扣订牢称为骑马订。

The algorithm performs discrete cosine transform on sub image of host image, which is cover by visible watermarking, and compresses sub image by select the set of visually important DCT coefficients. Then, the algorithm hides the compressed sub image, which is encrypted by the hash function that is constructed by Rijndael code, in the high coefficient of wavelet domain.

算法将水印图像与宿主图像进行融合，并对隐藏子图采用DCT变换，按Zig_Zag排序保留视觉重要DCT系数的方法作压缩处理，并利用Rijndael密码构造单向Hash函数作加密处理，最终分散嵌入到宿主图像的带参数的整数小波域中的高频系数，实现了可见水印的有效嵌入。

At first, analyze the farmer's desire for the pension by Rough Set theory, construct the attribute reduction algorithm based on the conditional entropy for the computation and analysis of 8,410 questionnaire surveys data to make use of the advantage of rough set to deal with indefinite and incomplete data.

首先利用粗糙集理论理不确定和不完整数据的优势，基于改进的基于条件熵的属性约简理论对8410份问卷调查数据进行计算与分析，得出与农民参保意愿密切相关的几个因素，如年龄、性别、收入、行业等。

Thirdly, by applying Frenchet derivative analysis, the iteration formula is derived to solve the constrained functional minimization problem, essentially the formula is a level set equation, in which the motion velocity of the level set is the shape sensitivity of material interfaces.

为了有效处理违反约束，这里还提出了在违反约束水平集的负法凸锥内构造水平集的法向修正速度的返回映射算法，它可以方便地处理多材料、多约束和含有非设计域的结构设计问题，使初值给定容易。

By applying Frenchet derivative analysis, the iteration formula is derived to solve the constrained functional minimization problem, essentially the formula is a level set equation, in which the motion velocity of the level set is the shape sensitivity of material interfaces.

这样就把材料界面表示为一组高维函数的水平集，使拓扑优化问题转化为材料界面追踪问题，这时材料界面的形状敏度就(来源：9aABb5C论文网www.abclunwen.com)是水平集的运动速度。

Secondly, by using the connection, we prove that the minimal continuous semi-flow is the minimal continuous flow if its time-one map is open, and for any minimal continuous semi-flow, there is an invariant residual set such that the restriction to the set is a minimal continuous flow.

为此，我们首先建立了它与其时间1映射极小集的联系；然后，利用这种联系证明了：若时间1映射为开映射，则它是极小的连续流，并且一般地说来，对任意极小连续半流，存在不变的剩余集，使得它在这不变集上的限制是极小的连续流。

Very interesting Mongolia philately covers, sending by a Chinese stamps collector in Ulan Bator to Beijing China, Sending on Dec 31th 2008 and Beijing dater Jan 7th 2009, using of 1981 Mongolia space plan FDC cover, The cover set of 7, We have 8 sets on stock, because all cover franking with diffents Space subject and other stamps on envelop, so the buyer will receive a similar 7 covers one set.

我们寄往中华人民共和国和台湾的邮件收取运费和合并运费的计算方式与海外相同，即在收取单项物品的最高运费(最低4美元)的基础上每增加一项加收0.30美元。我们只采用中国邮政特快专递来运送中国大陆买家的订单，不接受普通挂号邮件作为邮寄方式，因此，不会为中华人民共和国买家调整运费，不同意此项运费计算方式的中国买家请勿出价。

Chi Longcan points out, when " lasting tower " appear on the market in Korea after a few months, the player begins cent to give the occupation that be helpful for air battle or fights on the ground, star of the demon in resembling 8 big professions flies to be said to become stupid by the player in the sky, and big tank can become when going up, and guide like demon the star fights on the ground not bad, but bomber becomes in abyss, can be in the sky is remote atttack desperately etc; Hope future can be aimed at group of research and development this a little bit try to improve, but direction still does not decide at present, may turn profit clearly at set of role of war of empty, land, perhaps try modular gelatinization, will have special set and fine tuning.

池龙灿指出，当《永恒之塔》在韩国上市几个月后，玩家开始分出有利于空战或地上战斗的职业，像八大职业中精灵星在天上飞就被玩家说变笨了，而在地上时就能变成大坦克，而像魔导星在地上战斗还好，但在深渊里变成轰炸机，可以在天空远距离拼命攻击等；研发团队希望未来会针对此点加以改进，但方向目前还不确定，可能会明确化利于空、地战角色设定，或者加以模糊化，将会有特别设定与微调。

Methods Firstly,by definition it is proved that the minimality of a set is equivalent to the condition that the orbit of every point is dense in that set.

方法首先，利用定义证明一集合是极小的当且仅当每一点的轨道在该集合中稠密。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐