基于区块链技术的建筑材料供应链质量数据安全共享方法

传统方法在建筑材料供应链质量数据安全共享中应用效果不佳，不仅数据误码率比较高，而且数据共享时延比较长，无法达到预期的数据安全共享效果。为此提出基于区块链技术的建筑材料供应链质量数据安全共享方法。利用区块链技术对建筑材料供应链质量数据属性加密，建立建筑材料供应链质量数据安全共享链，整合建筑材料供应链质量数据加密、解密程序，通过对用户身份验证实现对质量数据安全共享，以此完成基于区块链技术的建筑材料供应链质量数据安全共享。实验证明，设计方法的数据误码率在1%以内，数据共享时延在1s以内，具有良好的数据安全共享效果。     

大豆大杂粉碎及重杂灭活工艺改造

随着国家对环保的重视,改变进口大豆大杂(豆荚、豆杆)焚烧处理的传统做法尤为重要,采用风选、粉碎等手段,区分处理轻重杂,杂质分别采用生产线高温高压和蒸汽湿热灭活法进行处理后,可充当纤维类物质掺入到成品豆粕中。根治环境污染的同时降低厂内安全风险,充分利用进口大豆秸秆类纤维物质,减少大豆损耗,以较小的投入实现经济效益和环境保护。     

桑叶配方颗粒物质基准研究

桑叶配方颗粒迄今尚没有统一的质量标准。为提升桑叶配方颗粒的内在质量,对其物质基准评价方法进行了研究。选取具有代表性产地的15批桑叶制备物质基准,采用高效液相色谱法,以芦丁、异槲皮苷、紫云英苷作为评价指标,确定桑叶物质基准的出膏率范围、标志性成分含量及转移率范围,采用超高效液相色谱法,建立物质基准UPLC特征图谱,并对其主要成分进行指认。结果表明:15批物质基准中,芦丁转移率为19.94%～34.05%,异槲皮苷转移率为11.67%～43.58%,紫云英苷转移率为10.73%～43.05%;物质基准特征图谱中,标定了14个共有峰,指认出7个色谱峰,分别为新绿原酸、绿原酸、咖啡酸、芦丁、异槲皮苷、槲皮素-3-O-(6″-O-丙二酰基)-β-D-葡萄糖苷、紫云英苷。所建立的基准评价方法为桑叶配方颗粒质量标准的制定及其后续大规模生产提供了数据基础。     

Material weakness disclosures and restatement announcements: The joint and order effects

We examine differences in stock price, option volatility, and litigation reactions to restatement announcements that are associated with a material weakness (MW) disclosure. Contrasted with restatements that are not associated with any MW disclosure, our analyses reveal that firms that announce both a restatement and an associated MW experience significantly more negative market returns, greater implied volatility, and higher likelihood of class action lawsuits. Separating the restatements into timely reporters, where the MW precedes the restatement, and non‐timely reporters, where the MW is concurrent with or follows the restatement, we find that timely reporters experience more negative returns at the time of the restatement, relative to non‐timely reporters, suggesting that investors perceive the early MW disclosure to signal more pervasive control‐related problems. Interestingly, we find that timely and non‐timely reporters are equally likely to be sued, consistent with the argument that wrongdoing (through either a timely or non‐timely MW disclosure) provides stronger grounds for establishing scienter. However, timely reporters appear to secure more favorable litigation outcomes: they face higher likelihood of lawsuit dismissals and pay much lower settlements, compared to non‐timely reporters. Overall, our evidence provides new insights into how market participants incorporate information about internal control weaknesses into their perceptions regarding the economic implications of financial restatements, and financial reporting quality.     

铁路建设项目地材调差的探讨

国家环保治理政策的执行日益严格,多地地材价格明显上升,但铁路工程按照相关政策对地材价差不予调整,各施工单位在承接铁路工程项目时承担了巨大风险。铁路建设项目地材是否有必要进行调差,地材价差的计算、价差分担、合同签订以及验工计价等工作如何开展,均成为困惑建设单位以及施工单位的问题。本文就某铁路建设项目开工以来一直探索的地材调差问题进行探讨,为寻求解决同类问题的同行提供参考。     

Single currency and fiscal performance: the early Euro Area in perspective

We examine how exchange rate regimes affect fiscal discipline by investigating European countries as they transitioned from flexible to fully fixed exchange rates under the Euro. We apply the synthetic control method to estimate, for each Eurozone country, its counterfactual budget stance under flexible rates. Our evidence strongly suggests that fixing exchange rates negatively impacted negatively fiscal discipline. However, effects were not homogeneous, as they were mediated by political factors. For example, countries where policymakers faced a longer political horizon and operated within a more cohesive political environment, managed to perform better in terms of fiscal discipline.     

信息化在石化企业物资采购管理中的应用

随着当前信息化技术的发展,我国进入了信息化时代。信息化技术逐渐在社会各个领域得到广泛应用。信息化技术为我国各项建设活动提供了更有力的支撑,推动着社会的发展。石化企业属于我国比较重要的能源产业,石化企业的发展情况对我国经济体制存在着直接影响。论文在关注信息技术的应用优势和分析石化企业物资采购管理情况等基础上,关注物资采购管理面临的问题,有效得出信息化在石化企业物资采购管理的实践应用对策。     

Do national political parties matter? Evidence from Italian municipalities

Recently several countries have experienced a drop in popularity of national political parties, accompanied by the success of independent movements (e.g. “Civic Lists” in Italy). I exploit the success of “Civic Lists” in Italian municipalities and use them as a comparison group for party-affiliated politicians, to test whether national parties affect fiscal discipline. Using a Regression Discontinuity Design (RDD), I show that party-affiliated mayors are more fiscally responsible: they run lower deficits, accumulate less debt and reduce expenditures. The effect is significant only for municipalities not constrained by fiscal rules. This suggests that national parties act as a substitute for fiscal rules in constraining politicians. Besides, I provide evidence that the discipline of party-affiliated politicians is linked to better career prospects: party-affiliated mayors have a higher probability of being re-elected and better chances of being promoted to higher levels of government. Alternative stories find less support in the data.     

基于供应链管理的发电企业物资采购研究

物资采购是企业管理中极其重要的组成部分,运用合理的采购模式不仅可以提高工作效率,而且还能降低成本。从这一点出发,论文分析了供应链管理的内容及内涵,并根据准时采购、全球采购和集中采购的模式提出发电企业供应链管理策略。     

论物保与人保并存纠纷中债权实现之顺位——以近五年来类案实证研究为基础

当前,物保与人保并存纠纷不断涌现，相关裁判时常冲突，引发社会关注。围绕当前物保与人保并存纠纷债权实现条款模式、关于物保与人保并存债权实现顺位之理解、债权人是否放弃物保之认定等相关问题，对近五年来最为主要的类案进行实证分析与比较研究可见，处理物保与人保并存纠纷，应当根据物保相对优先的精神，对保证人是否就放弃物保优先抗辩权重点作出判断，据此就物保与人保提供者的责任顺位作出正确裁决。