叠加共轭对称训练序列的OFDM系统时频同步方法

针对正交频分复用（OFDM）系统对同步错误率和频率偏移敏感的问题,提出了一种叠加共轭对称训练序列的OFDM系统时间和频率同步方法。该同步方法将快速傅里叶逆变换（IFFT）调制后的序列构成具有共轭对称特性的训练序列,并叠加到OFDM数据符号上;在接收端,利用叠加训练序列和融合循环前缀信息来获取OFDM系统同步信息。理论分析和仿真表明：在信噪比为5 dB时,该同步算法定时同步正确概率已接近100%;在信噪比为4 dB时,频偏估计精度可以达到10-4;该同步算法不仅具有更好的同步性能,而且节省系统的有效带宽以及降低系统的计算法复杂度。     

我国区域间虚拟水贸易的前瞻思考

目前,从一个国家之内的“区域”角度分析虚拟水贸易对解决地区水资源短缺尚是空白。基于我国幅员辽阔,南北地区间水资源禀赋差异大的特点,文章提出我国应通过区域间的虚拟水贸易解决西北、华北等地区的水资源短缺、水环境污染等问题,并对我国区域间虚拟水贸易的必要性、可行性以及可能产生的问题进行分析,并提出相应时策。     

浅析铁路建设项目竣工图编制标准化管理

竣工图是高速铁路建设国家档案验收的重要组成部分,影响着工程验收的质量.依据现行技术规范和实际经验,总结铁路建设项目竣工图编制中出现的关键问题,进而加强竣工图编制管理准标化,提高铁路建设项目档案验收质量.     

内蒙古旅游应用型人才培养模式探讨

近年来,内蒙古旅游业发展迅速,不断发展的旅游业对高素质旅游人才需求越来越大,探索与市场需求相适应的旅游应用型人才培养模式成为内蒙古高校旅游教育的紧迫任务。内蒙古财经学院经过多年探索与实践,主动适应市场需求,改革办学观念,成功构建起旅游管理专业应用型人才培养模式,取了良好的效果。     

Business Ties and Information Advantage: Evidence from Mutual Fund Trading

This article examines whether ties to portfolio firms’ management via pension business relationships provide mutual funds with an informational advantage. Funds become related to portfolio companies when fund families serve as trustees for firms’ employee pension plans. Selling by related funds is more likely to be motivated by an information advantage than their buying, because the latter is heavily influenced by the desire to secure pension inflows. We find that stocks with larger net sales by related funds experience lower future returns. Information appears related to firm fundamentals, as the return predictability of related funds’ selling concentrates in stocks with negative future earnings surprises. Consistent with an information‐based explanation, the predictive power of related funds’ selling for future returns is more pronounced when information uncertainty about the stock is higher. Our results contribute to a growing literature that shows the sources of informed trading by institutions.     

Is there Causal Relationship between Money Supply Growth and Inflation in China? Evidence from Quantity Theory of Money

This study examines the causal relationship between Chinese money supply growth and inflation, using the bootstrap Granger full‐sample causality test and sub‐sample rolling‐window estimation test to determine whether such a relationship in China supports the quantity theory of money. The result indicates that there is a unidirectional relationship from inflation to money supply growth. However, considering structural changes in two series, we find that short‐run relationships using full‐sample data are unstable, which suggests that full‐sample causality tests cannot be relied upon. Then, we use a time‐varying rolling‐window approach to revisit the dynamic causal relationship, and the results show that money supply growth has both positive and negative impacts on inflation in several sub‐periods, and in turn, inflation has the same effects on money supply growth for China. These findings are basically consistent with the modern quantity theory of money from the perspective of money supply and price level. When money supply growth does not outweigh output growth, inflation should not be curbed only by decreasing money supply. It notes that a stable money supply growth is critical to price level stability and economic development in China.     

员工持股、信息透明度与企业创新 ——基于员工持股计划的准自然实验

自2014年6月证监会重启员工持股计划以来,已有超过8%的上市公司推出员工持股计划预案。以2010—2017年A股上市公司为研究样本,基于多时点DID研究框架,用以控制可能存在的内生性问题。实证检验企业实施员工持股计划（ESOP）对企业创新活动的影响效果,以此揭示中国混合所有制改革背景下实施员工持股计划（ESOP）的真实效果。结果发现：实施ESOP的企业相较于未实施ESOP的企业具有更高的创新产出,并且在信息透明度更高的企业中这种促进作用更显著;相比于国有企业,在非国有企业实施ESOP对创新活动的促进作用更强。进一步通过中介效应对机制进行检验发现,实施ESOP后可以提高管理层创新意愿进而促进创新投入。研究揭示了ESOP对企业创新活动影响可能存在的作用机制,对广大投资者理解ESOP公司治理作用具有一定启示意义。     

我国注册会计师人才资源现状剖析

我国注册会计师事务所的竞争是人才的竞争。针对我国注册会计师人才资源目前的现状和经济发展对注册会计师人才的新要求,提出了改善我国注册会计师人才资源开发的主要对策。     

广西经济发展与金融工程需求分析——兼论金融工程人才培养

经济增长与金融发展是相互作用、相互制约的关系,本文在世界性金融危机的背景下,阐述广西的经济发展状况,从企业和商业银行的角度研究地方经济发展对金融工程的需求,分析制约广西金融工程发展的因素,提出促进广西金融工程理论与实践发展的建议及加强人才培养的措施。     

资产价格波动与货币政策研究评述: 信息、效应与选择

资本市场的快速发展,使资产价格波动与货币政策效果之间的关联性不断加大,资产价格波动对实体经济的影响也越来越大.本文遵循"信息一效应一选择"的逻辑,对资产价格波动与货币政策反应的相关文献进行了梳理和评述,在此基础上,探讨了货币政策应对资产价格波动的策略.