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The schemes presented in the present paper can be used for solving general problems, and their basic ideas can be directly used for treating elastic scattering problems as well as for establishing schemes for velocity and density inversion.

所建立的数值计算方案具有普遍的适用性,其基本思想可以直接用于解决弹性波散射的数值模拟问题并用于反演密度和速度。

If a boy doesn't smoke for the sake of you and please and he is together; If a boy is you but learns modifier oneself and please with he is together; If a boy doesn't shave beard will also naturally present in front of you, please and he is together; If a boy will shed tears for you and please and he is together; If a boy at suffer huge heartsick of time, depend on you, please and he is together; If a boy has been encouraging you are you wants to do of affair, please and he is together; If a boy hard considers future and please and he is together; If a boy induces your naturally for his future of one part, please and he is together; If a boy promises you and be you leave this front of world for an instant, he leaves first and please and he is together.

如果一个男孩不抽烟,为了你,请和他在一起;如果你是一个男孩,但学会修饰自己,请与他在一起;如果一个男孩不刮胡子的胡子也将自然存在于您的面前,请和他在一起;如果一个男孩会流泪,请你和他在一起;如果一个男孩在遭受巨大的沮丧的时间,取决于您,请和他在一起;如果一个男孩一直在鼓励你,你想做的事,请和他在一起;如果一个男孩很难认为未来并请他一起;如果一个男孩引诱你当然对于他未来的一个部分,请和他在一起;如果一个男孩承诺你和你离开这个世界前的瞬间,在他离开前,请和他在一起。

In general, this paper includes several parts, shown as the following: The first part summarizes the background and outline of stock index future and introduce briefly its local status and CSI 300 stock index future contract. The second part has a retrospect of the main academic papers of both local or overseas, and also a discussion of relevant hedge strategies and models, to lay a solid theoretical foundation for the empirical analysis and test for the operation process of hedge in latter parts. The third part outlines the principle, key factors and real operation process of hedge. Moreover, it makes a empirical analysis on popular hedge models with HK Hang Seng index. In the end, it test the hedge effect of trading on IF0706, CSI 300 stock index future contract, with CCB select-growth securities fund as present underlying. The fourth and also the last part, explores how to define hedge ratio in china mainland market. It includes the stability test ofβfor local securities portfolio, adjustment of historicalβand best data length for estimation of historicalβ, etc. Also, the thesis makes some beneficial experiments on the definition of best data length for estimation of historicalβ, survey of fashion forβand variation for industryβs. Fortunately, it's got some meaningful results.

按照以上研究思路,本论文论述由以下几个部分构成:第一部分,简要概述股指期货产生的背景和基本情况,对国内股指期货进程和沪深300股指期货合约进行简单介绍;第二部分,回顾海内外股指期货避险研究的主要文献,讨论相关避险策略及避险模型,为后面套期保值策略如何有效运用的实证分析和检验提供理论基础和依据;第三部分,对套期保值的原理、关键因素及实际流程进行概述,并采用香港恒生指数对常用的几种避险模型进行实证分析,最后一揽子以建信优选成长股票型基金为现货标的,实际检验以沪深300股指期货模拟交易IF0706产品进行对冲时的套期保值效果;第四部分,探讨国内确定避险比率的过程,包括国内股票组合β值的稳定性检验、历史β值的修正及估计历史β值的最佳数据长度等,通过数据分析,本文在寻找估计β值的最佳数据长度和考察风格、行业β值的差异上做了较为有益的尝试,并得到了有助于现实操作的结果。

For the pitch misgrouping problem caused by no voicing decision in Meddis'pitch extracting method for concurrent speech signals, referring to voicing decision for single speech signal, basing on the analysis of the voicing charater of concurrent speech signals, we present a voicing decision method in pitch extracting for concurrent speech signals. Double periodic degree and frequencies group's distribution degree are introduced for voicing decision of concurrent speech signals.

针对Meddis的基于听觉心理生理的混叠语音基频提取算法中不分清浊音所导致的语音基频错判问题,借鉴了单语音清浊音判断的方法,基于对混叠语音的清浊性能的分析,提出了混叠语音基频提取中的清浊音判断算法,提出了判断混叠语音周期性的双周期度及判断频带组周期性的分布度两个指标,用于混叠语音基频提取中的清浊音判断。

The new year concerts of Vienna have been rebroadcasted for almost twenty years. The music of Johann Strauss family has widely been well known by the professional musicians and the music amateurs. Although there are some simply introductive and short articles about the operetta "Die Fledermaus" at present, the music analysis of Adele in the operetta "Die Fledermaus" and the research of role image building of her are scarce. The present paper try to not only deepen the understanding of the image of the classical character of Adele, but also help the recreation of the image, through the research and exploration about the music image building of Adele.

在中国,现场转播维也纳新年音乐会也已近20年,约翰·斯特劳斯家族的音乐已为音乐界内外的许多人们熟知,对于《蝙蝠》这部轻歌剧,目前国内已经有一些简单、介绍性的、篇幅短小的文章,而令人遗憾的是,《蝙蝠》中经典角色阿黛莉的音乐分析和角色形象塑造的研究则尚未见到,本文试图通过对阿黛莉这个角色的音乐形象塑造问题的研究探索,使我们对这个经典人物形象的认识更加深入,同时也有益于该形象的再创作。

To make a comprehensive view of metapopulation researches, we folly analyze and summarize the present concepts, theories and models of metapopulation in this paper, which primarily includes the dynamical models and simulation approaches of single and competitive metapopulations. Based on the Levin's patch occupant model, the center framework of metapopulation researches, primary principles and mechanisms are discussed. First, Levins rule: the fraction of empty patch will remain constant with habitat destruction as long as metapopulation survives. This rule implies that empty patches have determinant effects on persistence and conservation. Second. Allee effect of metapopulation is incurred by establishing difficulties and dispersal costs, which is important to the studies of reserve area and the minimum available metapopulation size. Third, we analyze the rescue effect that immigrants can reduce the extinction risk of the presented local population. Rescue effect can leads to the improvement of metapopulation sustainability and the decrease of fraction of empty patches. Fourth, the coexistence mechanism of two competing metapopulation is discussed, which suggests that competition-colonization trade off may be prevalent in competing systems. Finally, extinction debt ob tamed from coexistence mechanism is given, which depicts the lost of species richness in the future for the current habitat destruction. After theoretical discussion, we present two popular simulated approaches in metapopulations: probability transition model and stochastic process model.

为了能总观集合种群进展的全局并开展进一步的工作,首先对集合种群的已有概念、理论和模型做了全面的分析和总结;其次对集合种群的发展和概念进行了探讨,以集合种群模型的中心框架:Levins的斑块占据模型为基础,展开对其它原理、效应和机制的探讨;主要包括了Levins原理,即当生境进到破坏时,空斑块比例在集合种群灭绝前保持不变,然后还分析了Allee效应(集合种群的Allee效应主要是由于建群困难和扩散损失造成的);第三,分析了援救效应:迁人个体可以降低斑块中现有局域种群的灭绝风险,援救效应会增强集合种群的生存力,使空斑块比例下降第四,探讨了两竞争集合种群的共存机制,即竞争-侵占妥协,其共存机制为空间生境中物种共存提供了有力的理论解释。

The series equipment versatillty,its performance had achieved the international advanced level,is at present is most effective,the practical reliable crushed stone machine,is suitable specially for the manufacture grinding compound,fireproof The matreial,the cement ,the quartz sand,the emery,the stove are cut broken glass the power,the copper ore,the concrete aggregate and so on many kinds of,the crisp materials on the control granulated substance machine energy conserva tion 50%,is in the present world system qranulated substance equipment.

本系列设备用途广泛,其性能已达国际先进水平,是目前最行之有效,实用可靠的碎石机器,特别适合于制造磨料,耐火材料,水泥。石英沙。钢砂。炉渣粉。铜矿石。铁矿石。金矿砂。河卵石。混凝土骨料。沥青骨料等多种。脆物料的细碎与中碎,是一种高效。节能的碎石制砂设备,比传统制砂机节能50%,是目前世界上篝的制砂设备。

The series equipment versatillty,its performance had achieved the international advanced level,is at present is most effective,the practical reliable crushed stone machine,is suitable specially for the manufacture grinding compound,fireproof The matreial,the cement ,the quartz sand,the emery,the stove are cut broken glass the power,the copper ore,the concrete aggregate and so on many kinds of,the crisp materials on the control granulated substance machine energy conserva tion 50%,is in the present world system qranulated substance equipment.

制砂机,制沙机设备用途广泛,其性能已达国际先进水平,是目前最行之有效,实用可靠的碎石机器,特别适合于制造磨料,耐火材料,水泥。石英沙。钢砂。炉渣粉。铜矿石。铁矿石。金矿砂。河卵石。混凝土骨料。沥青骨料等多种。脆物料的细碎与中碎,是一种高效。节能的碎石制砂设备,比传统制砂机节能50%,是目前世界上篝的制砂设备。

The present paper research is for the purpose of through to our country leaf tobacco circulation history, the present situation and the reform carries on the analysis, the utilization circulation theory, absorbs the domestic and foreign scholars earnestly about the leaf tobacco, the cigarette, the grain and the cotton circulation research results, and profits from the US, Brazil, Zimbabwe and so on overseas main leaf tobacco circulation pattern experience.

本论文研究旨在通过对我国烟叶流通的历史、现状及改革进行分析,运用流通理论,认真吸收国内外学者关于烟叶、卷烟、粮食和棉花流通的研究成果,并借鉴美国、巴西、津巴布韦等国外主要烟叶流通模式的经验。

Therefore, the following are the issues that the present paper intends to explore: what would happen to one's enculturation if the"break"occurs, what impacts that the"break"would have on the process, and what would result in for the man in his real life. The present thesis, reports the results of a comparative study on the issues between the enculturation of the Uygur children of the SOS of Urumqi and the enculturation of the rural Uygur families of Zanggui Town, Pichan County, Hotan Prefecture, Xinjiang, based on the ethnographic data obtained from the author's field work.

本文运用比较研究的方法,选择将乌鲁木齐SOS儿童村维吾尔&家庭&的濡化教育作为比较的重点,以和田地区皮山县藏桂乡的维吾尔族家庭濡化教育作为比较对象,对上面所提出的问题进行分析和研究:一、乌鲁木齐SOS儿童村维吾尔&家庭&濡化教育与和田地区皮山县藏桂乡的维吾尔族家庭濡化教育实施基础的比较;二、乌鲁木齐SOS儿童村维吾尔&家庭&结构与和田地区皮山县藏桂乡维吾尔族家庭结构的比较;三、乌鲁木齐SOS儿童村维吾尔&家庭&濡化教育与和田地区皮山县藏桂乡维吾尔族家庭濡化教育具体实施过程的比较。

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Present For The End Of The World
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In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷

Nusa lembongan : Bali's sister island, coral and sand beaches, crystal clear water, surfing.

Nusa Dua :豪华度假村,冲浪和潜水,沙滩,水晶般晶莹剔透的水,网络冲浪。