卷烟企业制丝线管控目标分析与设计

文章基于制丝线管理目标需求进行系统目标分析,分解系统结构并且进行优化设计,旨在改善制丝线管控目标控制效果,提高生产效能。     

市政工程设计阶段的工程造价控制

工程设计阶段是市政工程项目实施全面规划的关键阶段,关系到设计方案的技术先进性与经济合理性,对工程造价控制有着重要影响。然而就目前情况来看,我国市政工程设计阶段普遍存在工程造价控制意识薄弱、前期准备工作不到位、设计方案缺乏经济性、设计收费办法不合理等问题,严重影响了工程造价控制效果。本文对市政工程设计阶段工程造价控制存在的问题以及应对措施进行探讨。     

煤矿上山掘进轨道双提升系统的设计及应用

本文介绍了煤矿长斜巷正头掘进与斜巷中段联巷掘进同时施工的新型运输方式。     

平面设计软件的教学研究

平面设计软件的教学应注意:应用软件的选择,教学书目的选择,硬件设备的配置,教学方法的改进,学生自学能力和艺术设计能力的培养,优化教学效果。     

Optimal insurance in the presence of reinsurance

This paper studies an optimal insurance and reinsurance design problem among three agents: policyholder, insurer, and reinsurer. We assume that the preferences of the parties are given by distortion risk measures, which are equivalent to dual utilities. By maximizing the dual utility of the insurer and jointly solving the optimal insurance and reinsurance contracts, it is found that a layering insurance is optimal, with every layer being borne by one of the three agents. We also show that reinsurance encourages more insurance, and is welfare improving for the economy. Furthermore, it is optimal for the insurer to charge the maximum acceptable insurance premium to the policyholder. This paper also considers three other variants of the optimal insurance/reinsurance models. The first two variants impose a limit on the reinsurance premium so as to prevent insurer to reinsure all its risk. An optimal solution is still layering insurance, though the insurer will have to retain higher risk. Finally, we study the effect of competition by permitting the policyholder to insure its risk with an insurer, a reinsurer, or both. The competition from the reinsurer dampens the price at which an insurer could charge to the policyholder, although the optimal indemnities remain the same as the baseline model. The reinsurer will however not trade with the policyholder in this optimal solution.     

A structural framework for modelling contingent capital

This paper develops a structural model of contingent capital. In contrast to existing approaches we explicitly link the firm’s total payout to its cost of debt, leading to a total payout that is linear in—as opposed to proportional to—asset value. In the special case that asset value evolves as affine geometric Brownian motion we derive closed-form expressions for limiting (i.e. perpetual) bond values. The proposed model is flexible, so that it can be used to gauge the relative merits of different variations of contingent capital, and parsimonious, so that it is relatively easy to implement in practice. An empirical example using data from the Canadian banking sector is provided that illustrates how the model can generate insights into problems that are of interest to both regulators and issuers of contingent capital (e.g. what range of conversion prices would be consistent with regulatory guidelines, and how expensive is contingent debt over this range).     

万古霉素高产菌株选育及发酵配方优化

为了提高东方拟无枝酸菌产万古霉素的发酵单位,降低生产成本,采用紫外诱变、常压室温等离子体诱变对东方拟无枝酸菌出发菌株V19-02进行诱变处理,通过筛选链霉素抗性突变菌株,选育高产菌株;通过对发酵培养基中碳源和氮源进行筛选,选取葡萄糖、淀粉、低温豆粉、酵母粉4个因素进行均匀设计。结果表明,获得的高产菌株V19-1-07摇瓶发酵单位提高33.7%,且具有良好的传代稳定性;优化后的培养基配比质量分数为葡萄糖8.0%、淀粉1.0%、低温豆粉1.0%、酵母粉4.0%、氯化钠1.0%、磷酸二氢钾0.1%;小试结果证明,优化配方可使50 L罐发酵单位平均达到14 110 μg/mL,比原始配方提高了28.9%。因此,研究获得的高产菌株V19-1-07可应用于万古霉素工业化发酵生产,以帮助企业降低成本,进一步提高竞争力。     

电力市场效率评估与碳市场价格设计——基于电碳市场关联视角下的传导率估计

厘清并量化电力市场与碳市场间的关联关系,是深化电力市场改革与实现"双碳"目标的重要抓手。本文基于2006—2018年中国100个地级及以上城市的面板数据,使用似不相关回归模型评估了电力市场效率,在此基础上研究了电、碳市场关联条件下碳价对电价的传导率,并对不同场景下全国碳市场的碳价进行了优化设计。研究发现:(1)与非试点地区相比,碳市场试点地区中电力市场的无谓损失率更低,并且市场效率的提高具有更高的碳减排作用。(2)电、碳市场关联条件下,碳价对电力市场中居民电价的传导率高于对工业电价的传导率,但均远低于完全竞争条件下的传导率水平。(3)传导率的提升能够缓解"降电价"与"碳减排"之间的矛盾。当前传导率下电力市场效率目标与碳减排目标的协同实现需要碳价的大幅提升,而在完全传导的理想情况下最优碳价约为40元/吨。(4)长期而言,当前传导率下碳排放总量下降场景、经济增速放缓场景对应的最优碳价分别为255.05元/吨、173.63元/吨,而人口老龄化场景并未对最优碳价的设置形成约束。本文的研究不仅为电力市场与碳市场之间的关联奠定了理论基础,也为全国碳市场价格机制的优化设计提供了政策参考。     

“课程思政”理念下金融学课程的教学设计及创新

将课程思政融入金融学专业的教学是实现立德树人教育教学目标的重要途径。利用金融学专业课程众多历史案例,通过案例教学将金融知识、金融技能、金融素养和思政元素充分结合。运用线上线下相结合的翻转课堂教学方式,践行以学生为主体的教育观,将社会主义核心价值观和中华民族传统文化融入金融专业知识,为中国金融安全和长远发展培养具有专业知识和金融职业道德的全能型金融人才。     

48 基于分类矩阵的街道定位及设计框架 研究——伦敦《街道景观指南(2019)》及 相关实践解读

新版伦敦《街道景观指南(2019)》(以下简称《指 南》)通过构建基于移动性与场所性的街道分类矩阵框架, 精准定位街道功能与服务优先性,使得街道设计从单纯追求 交通网络效率转变为复合社会公共空间景观营造。根据新版 《指南》,深入解析主要内容与编制更新机制,剖析分类矩 阵认知框架构成及其在街道规划设计中的作用。结合实际应 用案例,反映《指南》及相关引导的实施情况。针对国内街 道景观设计引导提出应当构建顶层框架,明确街道分类,优 化街道指南编制完善引导体系,并提出案例机制提升指南可 操作性的建议。