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基于混合渠道的企业定向广告投放优化策略

计算机集成制造系统 2019年第9期25卷 2385-2394页

作者：赵江刘杰梅姝娥复旦大学管理学院上海200433 浙江财经大学工商管理学院浙江杭州310018 东南大学经济管理学院江苏南京210018

为了研究不同渠道对企业定向广告投放策略的影响问题,采用Stackelberg动态博弈建立了混合渠道模式下企业投放定向广告对产品的均衡价格、企业利润影响的决策模型。首先分析了单一渠道下企业投放定向广告的均衡策略,然后对混合渠道下企... 详细信息

为了研究不同渠道对企业定向广告投放策略的影响问题,采用Stackelberg动态博弈建立了混合渠道模式下企业投放定向广告对产品的均衡价格、企业利润影响的决策模型。首先分析了单一渠道下企业投放定向广告的均衡策略,然后对混合渠道下企业分散化策略进行了研究,最后系统分析了混合渠道集中化动态化策略。结果表明:一方面,当企业通过混合渠道向目标消费者投放定向广告时,制造商能够利用定向广告更有效地细分目标市场,准确识别对价格敏感的消费者并形成局部垄断市场;另一方面,传统零售商的市场份额下降,零售商和制造商的渠道冲突进一步加剧。制造商制定合理有效的定向广告强度策略可以在一定程度上缓解渠道冲突。

关键词：电子渠道混合渠道定向广告渠道冲突 Stackelberg动态博弈理论

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噪音交易、投资者情绪波动与股票收益

系统工程理论与实践 2009年第3期29卷 40-47页

作者：张强杨淑娥上海对外贸易学院金融管理学院上海201620

通过对Delong etc的噪音交易理论模型的修正,分析了投资者情绪对股票收益的影响机理.选择市场换手率、封闭式基金折价和投资者开户增长率作为间接投资者情绪指数,应用因子分析法构造综合投资者情绪指数,并应用OLS和GArCH-M回归分析方法... 详细信息

通过对Delong etc的噪音交易理论模型的修正,分析了投资者情绪对股票收益的影响机理.选择市场换手率、封闭式基金折价和投资者开户增长率作为间接投资者情绪指数,应用因子分析法构造综合投资者情绪指数,并应用OLS和GArCH-M回归分析方法对中国股市投资者情绪及波动与股票收益间关系进行实证分析.结果显示,投资者情绪是影响股票价格的系统因子,股票价格随着投资者情绪波动而波动,而且情绪的上涨和下降对股票价格的影响是不对称的,情绪上涨对股票价格的影响要比下降强的多;因投资者情绪波动而产生的股票收益波动构成市场系统风险并得到了相应的风险溢酬.

关键词：噪音交易投资者情绪股票收益

Comparative Analysis of Discovery Function of Cotton Future price among Different regions——A Case Study of Xinjiang

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Asian Agricultural research 2011年第8期3卷 32-36,40页

作者： LI Cheng-you1, YANG hong1, LIU Chun-yu2 1. economic and Trade Institute, Xinjiang Agricultural University, Urumqi 830052, China 2. Market and price Institute, Development and reform Commission, Macroeconomic research Institute of Xinjiang Autonomous region, Urumqi 830000, China economic and Trade Institute Xinjiang Agricultural University Market and price Institute Development and Reform Commission Macroeconomic Research Institute of Xinjiang Autonomous Region

Through comparative analysis, We research the relationship between cotton future price and cotton spot price in different regions, in order to formulate corresponding strategies in different regions under the new situation. We use ADF unit root test, e-G two-step cointegration test, Granger causality test, and other research methods in eviews 5.0 statistical software, to empirically study the relationship between the cotton future price and cotton spot price in Xinjiang, the relationship between the cotton future price and cotton spot price in China. The results show that there is a long-term relationship between the cotton future price and cotton spot price in Xinjiang, between the cotton future price and cotton spot price in China; the cotton future price plays unidirectional role in guiding cotton spot price in Xinjiang and cotton spot price in China. The discovery function of cotton future price plays much greater role in the cotton market of China than in the cotton market of Xinjiang.

关键词： Cotton Future price Spot price empirical test Chin

铁路建设项目实施阶段材料价差调整有关问题的探讨

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铁路工程技术与经济 2022年第3期37卷 67-70页

作者：符金娥甘肃天陇铁路有限公司甘肃兰州730046

铁路建设项目材料价差调整属于政策性费用调整,在项目建设实施过程中,由于建设周期长,主要材料价格波动大,铁路施工企业自购材料(以下简称“自购材料”)的价格也随之变化,以及项目管理单位按实际发生费用清算甲供材料设备(以下简称“甲... 详细信息

铁路建设项目材料价差调整属于政策性费用调整,在项目建设实施过程中,由于建设周期长,主要材料价格波动大,铁路施工企业自购材料(以下简称“自购材料”)的价格也随之变化,以及项目管理单位按实际发生费用清算甲供材料设备(以下简称“甲供物资”)费用。本文从项目管理单位角度出发,重点对铁路建设项目实施阶段材料价差调整的具体程序和操作流程进行探讨论述,以期实现有效控制项目价差阶段性调整的目的。

关键词：铁路建设项目材料价差调整操作流程

均值-方差准则下保险公司带内幕信息的时间一致投资-再保险策略

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系统科学与数学 2022年第9期42卷 2432-2447页

作者：何志强陈凤娥彭幸春武汉理工大学理学院武汉430000

文章研究在拥有内幕信息时保险公司的时间一致投资-再保险策略.假设保险公司的盈余过程为跳-扩散过程,证券市场由一个无风险资产和一个风险资产组成,且保险盈余过程与风险资产价格过程相关.从交易开始,保险公司掌握一些有关未来时刻风... 详细信息

文章研究在拥有内幕信息时保险公司的时间一致投资-再保险策略.假设保险公司的盈余过程为跳-扩散过程,证券市场由一个无风险资产和一个风险资产组成,且保险盈余过程与风险资产价格过程相关.从交易开始,保险公司掌握一些有关未来时刻风险资产价格的内幕信息,该信息受噪声扰动.运用滤子扩张技术将内幕信息下保险公司的财富过程进行转化.在动态均值-方差准则下,通过求解扩展的HJB方程组得到时间一致均衡投资-再保险策略以及均衡值函数的显式解,并给出相应的有效前沿.最后运用数值模拟方法分析了内幕信息及模型参数对均衡策略及有效前沿的影响.

关键词：投资-再保险均值-方差准则内幕信息市场相关性时间一致性

基于续航能力需求的新能源汽车产业链补贴策略研究

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系统工程理论与实践 2018年第7期38卷 1759-1767页

作者：马亮仲伟俊梅姝娥东南大学经济管理学院南京211189 兰州理工大学经济管理学院兰州730050

新能源汽车在产销量获得突破之后，充电基础设施不足成了制约进一步发展的重要因素，依靠新建短期内无法解决，着力提升汽车续航能力成为现实的可行选择．从产业链协调的视角出发，基于消费者续航能力需求，通过构建产业链一体化决策和... 详细信息

新能源汽车在产销量获得突破之后，充电基础设施不足成了制约进一步发展的重要因素，依靠新建短期内无法解决，着力提升汽车续航能力成为现实的可行选择．从产业链协调的视角出发，基于消费者续航能力需求，通过构建产业链一体化决策和独立决策模型，研究了新能源汽车产业链中电池生产商和汽车生产商的最优决策与协调问题，分别得出了两种决策下的最优策略组合，并分析了消费者续航能力需求对新能源汽车需求和价格的影响．结果表明：新能源汽车的需求和价格不仅取决于消费者的续航能力需求，还与产业发展水平和产业链决策方式有关，产业链一体化决策比独立决策更有效．为更好的实现一体化决策，引入了产业链内补贴机制实现了产业链协调，在此基础上给出了新能源汽车产业发展的政策建议．

关键词：新能源汽车产业产业链补贴

Initial Field evaluation of the Agro-economic effects of Determining Nitrogen Fertilizer rates with a recently-Developed Soil Test Methodology

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Open Journal of Soil Science 2013年第2期3卷 91-99页

作者： r. Daren Harmel richard L. Haney Grassland Soil and Water Research Laboratory USDA-Agricultural Research Service (ARS) Temple Texas USA.

Although agriculture is not the only contributor of excess nutrients to US waters, agriculture is an important contributor and should do its part to reduce nutrient loading. One important step in reducing agricultural contribution is to accurately account for all sources of plant available nutrients so that only needed nutrients are applied. In this study, three fertilizer rate treatments were evaluated: no fertilizer (control), traditional rate, and reduced rate based on a recently-developed enhanced soil test methodology. For each of nine sites in Texas, fertilizer data (formulation, rate, cost, and application date) and crop data (yield, price, and harvest date) were recorded, and economic throughput (profit) was determined. In this four year study, fertilizer rates were reduced 30%-50% (and fertilizer costs reduced 23%-39%) based on enhanced soil test methodology recommendations for wheat, corn, oats, and grain sorghum, but yields were not significantly reduced (0%-6%) and oat yields actually increased 5%. Profit decreased -18% for wheat, oats, and grain sorghum with reduced fertilizer rates. Although these changes were not statistically significant, they do represent benefit through increased profit potential and decreased input cost and production risk. In only 6% of the time was the traditional fertilizer rate the most profitable, compared to 51% for the unfertilized treatment and 43% for the enhanced soil test treatment. These results do not indicate that fertilizer application should be avoided but that fertilizer rates should be carefully chosen considering all sources of plant available nutrients (e.g., mineralization, irrigation water, nutrients deeper in the soil profile) to ensure that fertilizer is applied at the optimal rate.

关键词： Soil Tests Crop Yields On-Farm Profit Water Quality

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基于焊缝增强接头技术的模型参数

钢结构(中英文) 2008年第5期 69-69页

作者： Sooyong Park Sanghyun Choi Norris Stubbs robert Bolton Angie H. price Charles Sikorsky

基于整体无损伤评估方法,采用模型参数,定量评估了建设过程中焊缝增强接头技术的可行性。根据钢的屈服强度和焊缝中有效刚度的变化,改进了预测焊缝强度的表达式。通过模型参数的变化和系统识别技术,在27个焊缝区域,进行了局部刚度变化... 详细信息

基于整体无损伤评估方法,采用模型参数,定量评估了建设过程中焊缝增强接头技术的可行性。根据钢的屈服强度和焊缝中有效刚度的变化,改进了预测焊缝强度的表达式。通过模型参数的变化和系统识别技术,在27个焊缝区域,进行了局部刚度变化的无损测量试验。为了比较,传统的无损监测(NDT)方法、射线探伤以及破坏张拉试验均被用以评估无损强度预测程序的精度,从强度破坏模型和无损测量刚度变化焊接系统中所得到的预测强度与从破坏张拉试验中得到的结果也进行了比较。同时对该方法的适用范围进行了研究。

关键词：无损评估焊接模型参数强度预测

Availability, Accessibility and Contribution of Infant Flours to the Diet of Children Aged 6-59 Months in Benin

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Agricultural Sciences 2023年第12期14卷 1766-1787页

作者： Flora T. F. Laleye Nadia Fanou-Fogny Yann e. Madode Flora J. Chadare Marius S. Kanhounnon Bernadette H. Boyiako Mourichide M. Achamou Djidjodo J. Hounhouigan School of Nutrition and Food Sciences and Technologies Faculty of Agronomic Sciences University of Abomey-Calavi Cotonou Benin Laboratory of Food and Bioresource Sciences and Technologies and Human Nutrition School of Sciences and Techniques of Conservation and Transformation of Agricultural Products University Center of Sakété National University of Agriculture Sakété Benin

This study assesses the nutritional composition as well as the availability and affordability of infant flour found on the market and in the households of Benin. To do that assessment, a two-step cross-sectional survey based on food ethnography methods was used. A total of 61 marketplaces were visited in seven towns and rural districts as part of the availability and affordability survey, while 400 children (aged 6 to 59 months) were surveyed to track the uses of infant flours at the household level. The results obtained reveal that pre-manufactured infant flour is sold more in urban areas (Cotonou, Porto-Novo and Parakou) than in rural ones. The average infant flours price did not vary (p = 0.985) in any given year (regardless of abundance or lean periods) nor does it vary (p = 0.133) from one point of sale to another (drugstore or supermarkets). However, the average price is found to be expensive considering the purchasing power of the households surveyed. On the other hand, the amount of ingredients used in the production of the flour types found on the market complies with the recommendations of the Codex Alimentarius, unlike the homemade ones. Pre-manufactured infant flour is found to be outside of the economic reach of most households (92%) who rely heavily on the homemade ones to feed their children. In light of the above, public authorities should help improve geographic access and pricing affordability to quality infant flour for low-income households in urban and remote areas. Moreover, awareness should be raised among mothers relative to the importance of complementary feeding through education on good nutrition practices.

关键词： Infant Flour Complementary Feeding Nutritional Composition Children Food ethnography