低相噪恒温晶体振荡器的研制

介绍了频率为50MHz的低相噪恒温晶振的设计方法，分析了影响晶体振荡器相位噪声的主要因素，同时给出了研制产品的测试结果。     

利用Crystal Ball进行基于时间序列的人口预测——以澳门为例

珠三角是我国经济发展最快的地区之一,正值建设进程中的港珠澳大桥对促进香港、澳门和珠江三角洲西岸地区经济的进一步发展具有重要的战略意义。澳门毗邻珠海,其人口数量和结构的变化对珠三角地区尤其是珠海市的经济结构会造成很大的影响。本文以预测澳门未来的人口发展趋势为例,阐述如何利用Crystal Ball软件进行基于时间序列的人口预测,以期对于珠海及澳门未来在加快相关产业转型升级、转变外贸发展方式、加快医疗、养老、教育、房地产、户籍制度等相关方面需求改革与合作等起到一定的借鉴意义。     

高效液相色谱法和高效液相色谱-质谱/质谱法测定荔枝中对氯苯氧乙酸（钠）

建立了荔枝中对氯苯氧乙酸（钠）残留量的液相色谱和液相-串联质谱检测方法,采用碱性水提取,利用二氯甲烷液液萃取进行净化,用液相色谱方法在280 nm检测,检出限为0.02 mg/kg。在负离子模式下进行液质串联质谱检测,检出限为0.01 mg/kg。本方法的添加回收率在78.2%～106.7%,变异系数为2.0%～12.2%。回收率、检测限等技术参数均能满足相关检测要求。本方法应用于65个实验样品的检测,其中有两个样品为阳性,含量分别为0.032 mg/kg及0.026 mg/kg。     

超高效液相色谱-串联质谱测定苹果制品中的棒曲霉素

建立了简单、快速测定苹果制品中棒曲霉素的超高效液相色谱-串联质谱确证检测方法。样品经乙腈提取,并经Mycrosep 228AflaPat多功能柱净化后,采用超高效液相色谱-串联质谱进行检测。标准溶液在2100μg/L范围内呈线性相关（r：0.999）,不同基质样品中添加回收率为83%98%,RSD〈10%。该方法操作方便、快速,灵密度高,可满足苹果制品中棒曲霉素测定的要求。     

饮料食品添加剂检测中液相色谱法的应用分析

食品添加剂是为改善食品品质、防腐和加工工艺的需要而加入食品的人工合成或天然物质,大大促进了食品工业的发展。但有很多厂家的添加剂存在着严重的安全问题。本文对于饮料食品添加剂检测中液相色谱法的应用进行相关的分析,希望对食品安全做出应有的贡献。     

家庭资产结构与消费倾向:基于CFPS数据的研究

文章基于CFPS数据,将居民家庭资产区分为流动性较高的资产和流动性较低的资产两种类型,把不同类型资产的变现成本引入到家庭消费决策的分析中,构建了一个双资产消费决策模型,并实证研究了家庭资产结构对消费倾向的影响。整体来看,家庭流动性较高的资产占比提升有助于提高家庭的平均消费倾向,流动性较高的资产占比每增加1个百点,家庭的消费倾向增加0.11个百分点;随着家庭流动性较高的资产占比的增加,其对消费的促进作用也会显著增加。通过提高资产整体的流动性,降低金融服务费率,有助于从微观视角上扩大居民的消费需求。     

Research note: point-of-purchase display and brand sales

We report the results of two field experiments on the relationship between store display and the sales of a new brand. When the space in a single display was increased, sales tended to increase disproportionately. When the number of displays was increased from one to two, the sales effect of the second display was additive.     

酸性离子液体催化合成3，4-二氢嘧啶酮

本文利用酸陡离子液体1一甲基咪唑硫酸氢盐[Hmim]Hso2作催化剂,催化乙酰乙酸乙酯、芳香醛和尿素三组分缩合反应,合成5,4-二氲嘧啶酮。实验结果表明,该方法操作简单,产率高（80％-95％）,反应时间短（2h）,环境友好,是一种高效合成5,4-二氢嘧啶酮的方法。     

How Dispersive Opinions Affect Consumer Decisions: Endowment Effect Guides Attributional Inferences

Electronic word-of-mouth (eWOM) dispersion, reflecting the extent of reviewers’ opinion divergence regarding a product, determines consumer decisions. Drawing upon the endowment effect and attribution literature, this research proposes that the endowment effect mediates the influence of eWOM dispersion on attributional inferences, and the display formats of eWOM dispersion (“horizontal bar chart” vs. “eWOM content”) moderate the mediating influence of endowment effect on attributional inferences of eWOM dispersion. Three complementary studies reveal three key insights in this setting. First, when consumers already having an emotional attachment to a product and subsequently encountering dispersive eWOM, the higher the level of eWOM dispersion, the stronger the endowment effect. Secondly, In such circumstance, the stronger endowment effect promotes more reviewer-related attribution inference of high-dispersion eWOM, and the weaker endowment effect promotes more product-related attribution inference of low-dispersion eWOM. Third, the positive influence of eWOM dispersion on endowment effect is stronger for eWOM dispersion in the complexity or disfluency display format (i.e. “reviewers’ impression of product”) than for eWOM dispersion in the simply of fluency display format (i.e. “horizontal bar chart”), more importantly, the mediating influence of endowment effect on attributional inferences is moderated by the display formats of eWOM dispersion, and this findings persists even when product category (hedonic vs. utilitarian) is taken into consideration. The theoretical implications for the eWOM dispersion and attribution literature and practical implications for online retailers are discussed.     

Development of virtual cyber‐tour in the virtual reality system

This study is to explain the importance and the necessity of virtual cyber‐tour in a virtual reality environment, and to present a way of its realization as a means to surmount the fundamental constraints in current tourism, arising mainly from the individual health, cost, leisure time, and the low perception on tourism culture. This virtual cyber‐tour using virtual reality technology will not only provide various indirect tour experiences to the existing tour resources, but also develop a new type of tour system, leading to new worlds which have not been accessible to the public because of various restrictions coming from the current technology, transportation means, and physical limits of human body. Thus, the cyber‐tour will be a new tour resource of totally different concept and also, its industrialization will result in the developments of new industries for virtual reality system, video production, and display media, creating lots of jobs and added value.