几种辅料对罗红霉素胶囊质量的影响

文章通过选择合适的辅料并调整其在罗红霉素胶囊中比例的试验，发现淀粉、预胶化淀粉、羧甲基淀粉钠（CMS- NA）、滑石粉、微粉硅胶等辅料的选择与用量大小对罗红霉素胶囊产品质量有一定的影响。     

Genetic Information in Agricultural Productivity and Product Development

Two prominent features of recent changes in agriculture have been the advent of precision breeding techniques and an increase in the level of information netputs in production. This article identifies ways in which these features may complement in expanding the variety of processed products, level of productivity, and rate of change in productivity. Using a martingale concept of information, we identify conditions under which information increases the incentives to invest and engage in product differentiation activities. A theory on how genetic uniformity can enhance the rate of learning through process experimentation, and so the rate of technical change, is developed.     

Interplay of insurance and financial risks in a stochastic environment

Consider an insurer who makes risky investments and hence faces both insurance and financial risks. The insurance business is described by a discrete-time risk model modulated by a stochastic environment that poses systemic and systematic impacts on both the insurance and financial markets. This paper endeavors to quantitatively understand the interplay of the two risks in causing ruin of the insurer. Under the bivariate regular variation framework, we obtain an asymptotic formula to describe the impacts on the insurer's solvency of the two risks and of the stochastic environment.     

“Unprecedented,” “extraordinary,” and “we're all in this together”: Does advertising really need to be so tedious in challenging times?

As government-mandated lockdowns and steep declines in trade set in because of the COVID-19 pandemic, a common theme became apparent in the advertising of the time: It was all the same. Regardless of the product category or brand personality, many ads were remarkably similar. They began with melancholy music, voiceovers reminding the audience that the brand is here for them, and referred to these times as “unprecedented” and “extraordinary.” Ads reassured viewers that “together, we can get through this.” In this installment of Marketing & Technology, we articulate the problem of advertising sameness and explore how and why it likely arises during a time of crisis. We then discuss why advertising uniformity is a problem and present a series of strategic, media, and creative considerations—taking into account the constraints of a crisis— to help marketing professionals produce more effective advertising in the context of a disaster.     

真空吸附夹具系统的设计

用真空吸附夹具装夹薄板零件进行加工是保证零件厚度均匀性的有效方法,该夹具的关键是真空吸附系统及夹具的设计与制造。重点论述了真空吸附夹具系统的构成及设计要求,并用该夹具装夹加工了样件。试验结果表明:加工厚度为0.8 mm,面积为4×104mm2的薄铝板,厚度精度达到±0.02 mm以内,同时该装夹方法与传统的相比,效率提高60%以上。     

Uniformity Requirement and Political Accountability

This paper discusses the fundamental hypothesis of policy uniformity under centralized decision making, which underlies Oates' famous decentralization theorem. The theorem has, in more recent times, come under pressure owing to the prediction that local public goods are provided to minimum winning coalitions rather than uniformly. The focus of this paper is on the impact of uniformity rules on political accountability. Using the concept of minimum winning coalitions, it is shown that the power of voters over politicians vanishes if election districts receive different levels of local public goods. However, the setting up of sufficiently strong uniformity rules means that voters regain power. According to Oates' theorem, uniformity is the main disadvantage of centralization but, according to the analysis undertaken in this paper, centralization without uniformity would be even worse.     

高大平房仓冬季覆膜通风降温工艺探析

充氮气调储粮技术有显著的保鲜及虫霉防治效果和良好的社会效益.为缩短春季气调密闭时间,提高资源利用率,实现高大平房仓气调仓全储存周期覆膜储藏,开展了高大平房仓覆膜通风降温试验.本试验探析覆膜通风工艺应用,对降温效果、通风均匀性、水分损失和经济效益进行了分析.结果表明,覆膜通风与揭膜通风均有良好的降温效果;与揭膜通风相比,...     

就地热再生沥青混合料均匀性的影响因素研究

为了提升就地热再生沥青混合料的路用性能,以数字图像处理技术进行集料识别为基础,采用均匀性评价确定再生混合料的集料分布不均匀系数D、新集料分布不均匀系数H、孔隙分布不均匀系数K和试件的孔隙率V,通过正交试验讨论了RAP加热温度、RAP拌和时间、新沥青混合料拌和温度及新旧料混合时间对就地热再生沥青混合料均匀性的影响,对结果...     

静压式空调送风道送风均匀性研究

新型空调静压式送风道的送风均匀性较传统送风道有较大的改善,在分析送风道结构和送风原理的基础上,计算出不同工况下静压箱条缝送风口出流的不均匀性系数,以及理论平均出流速度、实际平均流度、风道漏风系数及风道的最大和最小不均匀性系数。通过对数据的分析,为提高和改善送风道的送风均匀性,优化送风道的结构提供依据。