80 research outputs found

    中国电视广告现状分析与发展对策

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    电视广告经营关系到广告方与电视台的切身利益,而且对经济发展也有很大关系。文章首先对中国电视广告的现状在回顾的基础上进行了分析;然后阐述了中国电视广告的面临的机遇与挑战以及存在的问题;最后对中国电视广告经营提出了一些看法与建议

    能源需求与经济增长互动关系的实证研究

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    能源作为支撑经济发展的"血液",对经济发展的作用是无可替代的。在中国经济持续保持快速发展的情况下,对能源的需求也日益增长,能源安全战略也是国家的一个重要发展战略。通过运用ADF检验讨论能源消耗与经济增长的平稳性,建立ARMA模拟合能源消耗量的变动趋势,运用模型探讨近20年来中国能源需求组成的变化情况与经济增长的关系

    中国能源需求的模型选择

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    主要想探讨一下1953-2006年来中国能源需求的变化情况,对原始数据进行对数差分和单位根检验后,运用ARIMA模型对能源需求进行拟合与预测,最后选择一个比较好的拟合模型来显示能源需求的变化

    Research on Volatility in Chinese Stock Market--Based on GARCH and MRS-GARCH Class Models

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    本文对上海证券交易所1994年9月1日至2011年7月12日的上证指数收益率的波动率进行了实证分析与模型外推。文章除了考虑GARCH、EGARCH、GJR模型外,还考虑到具有机制转移特性的MankovRegimeSwitchingGARCH(MRS-GARCH)模型。文章考察了正态、t以及GED分布三种情况。参数估计显示单一机制跟马尔科夫机制模型都具有较好的解释能力。采用7种模型评价标准对样本内效果进行评价,发现没有绝对占优的模型。在样本外预测效果上,1日预测效果要明显好于5日预测效果。MRS-GARCH类模型由于考虑了机制转移性,对高波动区域的预测较为精确。同时,MRS-GARCH类模型估计...In this paper, we use GARCH、EGARCH、GJR class models to capture the dynamic volatility process for daily returns of the Shanghai Composite Index data. To consider the Markov regime switching character, the paper also apply the Markov regime switching GARCH class models. Our empirical study has four major findings. First, the estimation results indicate that the parameters estimation are reasonable...学位:金融硕士院系专业:王亚南经济研究院_金融学(含保险学)学号:2772008115290

    浅谈我国“电视购物经济”

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    电视购物在中国已经走过了十多年的发展历程,电视购物经济也经历了从无到有,逐渐成为一个受人瞩目的行业。文章回顾和叙述了我国电视购物的发展历程与现状;阐述了电视购物经济对国民经济以及有关部门的影响与意义;分析了电视购物的优势与现在面临的困境;最后对发展中国电视购物经济提出了一些看法与建议

    下游国的贸易报复与中国稀土出口政策

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    本文通过在纵向关联市场框架下构建一个博弈模型,研究两个下游国在分别采取独立贸易报复与联合进行贸易报复两种情况下,中国政府应采取的稀土出口政策。研究发现:(1)当下游国家独立采取贸易报复措施时,若中国稀土产业集中度低(高),则应对稀土出口进行征税(补贴),而下游国会对最终产品出口进行补贴(征税)。(2)当下游国联合进行贸易报复时,在中国稀土产业集中度很低且下游国产业集中度很高的情况下,中国应对稀土出口进行征税,而下游国总会选择对最终产品出口进行征税。(3)若考虑到稀土生产带来的环境污染,则随着环境污染系数增加,无论下游国家采取何种方式的贸易报复措施,中国对稀土出口都将会进行更多的限制

    下游国的贸易报复与中国稀土出口政策

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    本文通过在纵向关联市场框架下构建一个博弈模型,研究两个下游国在分别采取独立贸易报复与联合进行贸易报复两种情况下,中国政府应采取的稀土出口政策。研究发现: (1) 当下游国家独立采取贸易报复措施时,若中国稀土产业集中度低(高) ,则应对稀土出口进行征税( 补贴) ,而下游国会对最终产品出口进行补贴(征税) 。(2) 当下游国联合进行贸易报复时,在中国稀土产业集中度很低且下游国产业集中度很高的情况下,中国应对稀土出口进行征税,而下游国总会选择对最终产品出口进行征税。(3) 若考虑到稀土生产带来的环境污染,则随着环境污染系数增加,无论下游国家采取何种方式的贸易报复措施,中国对稀土出口都将会进行更多的限制。该文发表在《世界经济》2012年第8期,pp92-114

    DESIGNING SOPC-BASED TURBO DECODER

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    TurbO码的译码性能几乎接近SHAnnOn理论极限,实现TurbO译码器对于降低信道传输的误码率、提高传输可靠性具有重要的意义。借助XIlInX Edk软硬件开发工具构建了一个TurbO译码器和以太网络传输的SOPC系统,实现了网络通信下的TurbO译码,并将所构建SOPC系统的硬件比特流和软件程序下载到XIlInX公司的SPArTAn-3S1500开发板上验证成功。实验结果表明,所设计的SOPC系统能实现数据的动态传输和信道纠错。Decoding performance of Turbo codes almost approaches to the limit of Shannon theory.The implementation of Turbo decoder is important for reducing the error bits rate in channel transmission and improving transmission reliability.An SoPC system of Turbo decoder and Ethernet-transmission is constructed by using the tool of Xilinx EDK software and hardware development,which realises the Turbo decoding in network communication.The hardware bit stream and software program of the constructed SoPC system are downloaded to Spartan-3s1500 development board of Xilinx Inc.and their correctness are proved successfully.Experiments show that the designed SoPC system can realise dynamic data transmission and channel's error correction.福建农林大学青年教师科研基金项目(08B24

    ボランティア学習に関する一考察-ボランティア論受講生の作文の分析から-(鈴木富久教授退任記念号)

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    We conducted a study on volunteering by comparing essays written by college students about their first volunteering experience with essays by so -called "expert volunteers" taking a leading role in the volunteering movement in Japanese society today. The essays were analyzed with reference to seven aspects, including the type of activity, when and for how long it was carried out. Our analysis found significant differences in every aspect, and that no student shared similarities with experts. The results indicate that volunteerism programs at Japanese schools fail to develop human resources capable of continuing their activities as a volunteer, in other words, capable of incorporating their activities in this field into their daily life and leading society in terms of volunteering. We expect that programs at schools will be improved

    Effect of Substituents of Amines on Electrochemiluminescence of Tri(2,2′-bipyridine)ruthenium with Some Amines

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    研究了苦豆子中主要生物碱槐定碱、苦参碱 ,以及神经兴奋药物甲基安非他命、安非他命等化合物 ,在碱性联吡啶钌 [Ru(bpy) 3 2 + ]水溶液 (pH 9 0 )中的电致化学发光 (ECL)行为 .在玻碳电极上 ,生物碱中的氨基氮于 +1 30V(vs .Ag/AgCl)左右被氧化为氮正自由基离子 ,该自由基离子与Ru(bpy) 3 2 + 反应生成激发态的Ru(bpy) 3 2 + 而发光 .研究比较了取代基性质、氨基氮周围的三维空间结构对各生物碱ECL的影响 ,并结合生物碱氨基氮的电离势和键角的计算 ,对这些影响进行了解释 .Electrochemiluminescences (ECLs) based on tris(2,2′-bipyridine)ruthenium (Ⅱ) [Ru(bpy) 3 2+] and some alkaloids or amines such as sophoridine, matrine, methamphetamine and amphatamine in phosphate buffer solution (pH 9.0) are studied. The light emission is mainly caused by the electro-oxidation reaction between amino group on the alkaloid compounds and Ru(bpy) 3 2+ in a thin layer flow cell equipped with a glassy carbon disc electrode (22.1 mm 2) at about the potential of +1.30 V (vs. Ag/AgCl). The luminescence wavelength of 610 nm confirms that ECL is caused by Ru(bpy) 3 2+* back to its ground state. The effects of the nature and three-dimensional conformation of the substituents of these alkaloids on the ECL intensities are discussed. Ionization potentials and angle of C-N-C bond taken from calculation data further confirm the experimental results.国家自然科学基金 (No .2 98770 2 2 )资助项
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