基于DSP的高动态接收机载波捕获跟踪技术

介绍了高动态GPS接收机的码捕获与载波跟踪的原理,设计了一种基于高速数字信号处理(DSP)技术的PLL FLL环混合全数字高动态载波跟踪技术方案,同时给出了一种在连续高动态下载波跟踪算法即基于交叠离散傅里叶变换的频率跟踪算法(ODAFC),并对此算法进行了仿真验证.仿真结果证明了该算法的正确性.     

The usage of media across product classes: the influence of demographics and psychographics

The purpose of this study was to investigate the differences in the types of media used for four product classes, and to examine the effect of respondent's demographics and psychographics on the types of media. Eight hundred and four respondents were randomly selected from the population (8040) of five residential sections of Lubbock, Texas, by using systematic sampling. Different merchandise names representing the classes of product were listed in the questionnaire. The respondents were asked to rate each type of merchandise according to the order of media usage when they purchased the merchandise. One hundred and fifty-two questionnaires were analysed by factor analysis, multivariate analysis of variance, and Friedman two-way analysis of variance by ranks. Eight psychographic factors extracted by factor analysis were Traditional, Self-confident, Satisfied with Finances, Satisfied with Friends, Living Optimist, Self-conscious, Community Minded, and Homebody. Self-conscious was the only factor to affect the consumers' usage of newspapers, television, radio, magazines and direct mail. In addition, the usage of television was affected by the Satisfied with Finances factor. The demographic variables of marital status, age, education, ethnic group, political outlook, occupation and social level influenced the usage of newspapers, magazines, radio, television and direct mail. The usage of television was affected by one's political affiliation. Income did not influence media usage. The findings indicated that the individual's usage of the newspapers, television, radio, magazines and direct mail was affected by the classes of products: convenience, preference, shopping and speciality goods.     

技术创新推进我国传统产业升级改造

本文认为,技术创新是企业实现可持续发展的不竭动力,当前我国传统产业的发展已陷入困境,必须以技术创新为动力,走向新型工业化之路。一是集中投入,在传统产业的关键性技术领域取得突破;二是加大投入力度,建立健全传统企业研发机构;三是实施传统产业结构调整,加快技术改造和产业升级;四是利用信息技术渗透、改造和提升传统产业;五是高度重视创新人才培养。     

高校社会问题、社会工作视角及其教学模式

从12世纪起,西方近代意义上的大学（高校）已经走过了近千年的发展历程,为人类知识的创造、知识的传承和应用做出了巨大的贡献。随着社会发展与变迁,大学也被卷入了世俗化、社会化的行业,使得高校不得不面临繁杂交织的社会问题。作为高校主体之一的大学生,被各种心理问题、偏差行为困扰,高校大学生自然成为以青年社会工作为内容的学校社会工作教学对象,需要用灵活的、具有亲和力的社会工作方式与教学模式进行关注和介入。     

江苏省县域农村居民点空间格局演化特征及驱动过程——以如皋市为例

基于1995-2010年4个时相的遥感影像,通过分析县域尺度的Ripley K函数特征、景观指数变化和行政村尺度的农村居民点空间关联格局特征来研究如皋市农村居民点空间演化特征,并分析演化的驱动过程。结果表明:11995-2010年如皋市农村居民点连通度、聚合度和形状复杂度增加,却未形成有效集聚,呈均匀分布特征,但均匀程度增加不显著。其中2000-2005年,农村居民点空间格局演化特征最显著。2农村居民点局部自相关性强,热点区域由经济较为领先的西北片区逐渐转移到后发追赶的东南片区,在热点转移过程中处于高值簇的乡镇单元会影响附近的区域,热点比重整体上升。3区域工业化和城镇化进程的推进及其空间不均衡性,是驱使如皋市农村居民点空间格局时空演化的主要过程,农村居民收入水平及其完成市民化转变的成本是其主要影响因素。     

政府会计资产负债要素的界定及披露问题研究

本文在阐述政府资产负债要素的界定和分类基础上,结合美国和日本等发达国家政府会计实践探讨了政府资产负债要素的披露问题,尤其针对政府特殊资产负债的披露提出了具体建议。     

便利收益下碳排放动态套期保值效果

随机的碳排放价格变化直接导致资产组合的投资风险加剧，影响碳排放现货与期货资产的投资组合策略。依靠商品期货价格的期限结构，本文提出了一种新的在便利收益下动态套期保值比率及其套期保值效果评价方法。动态套期保值比率是由现货和便利收益的波动率、协方差及其相关系数、距离到期日时间、便利收益均值回复速度等参数存在紧密关联性。为了有效地规避碳排放现货价格剧烈波动所引发的市场风险，市场参与者利用便利收益的历史信息优化调整期货与现货的对冲比例，确定最优化的套期保值比率，可以有效规避现货资产的市场风险，实现资产投资组合最佳的投资收益。     

The Unemployment and Wage Effects of Shifting to an Indirect Tax in an Efficiency Wage Model

This paper examines the unemployment and wage effects of the tax shift from an income tax to a consumption tax in a shirking-type efficiency wage model. It is found that the results of the ex-ante individual income-neutral and aggregate revenue-neutral proposals in this paper's efficiency wage model confirm those in the monopoly trade union model analyzed by Sampson (1986), Creedy and McDonald (1990, 1992), and Pemberton (1992). The ex-post tax-shifting schemes are also discussed.     

提高欠发达地区高校资金使用效率的几点建议——以江西省普通高校为例

以江西省属普通高校为例,在分析江西高校资金使用现状及存在问题的基础上,对提高欠发达地区高校资金使用效率提出了几点建议,以期为欠发达地区高校财务管理有所裨益。     

我国煤炭企业社会责任发展历程与现状分析

从科学发展观的角度,梳理了我国煤炭企业社会责任发展的历程,并以详实的数据对其社会责任现状进行了描述分析,以期为完善我国煤炭企业社会责任理论体系提供借鉴。