红枣裂果的气候环境背景及其防御

红枣成熟期的裂果,是影响产质产量的主要问题之一.引起红枣裂果最直接的外部因素是成熟期的连阴雨.文章针对红枣裂果的气侯环境作出研究,并总结出采取棚盖、覆膜、喷药、套袋等措施进行防御,对保证产质产量,收到了较好效果.     

桥梁高性能混凝土裂缝原因及预防措施

混凝土产生裂缝的原因比较复杂,主要对桥梁高性能混凝土裂缝产生的原因进行了分析,阐述了预防裂缝的措施及采用新的施工工艺,使桥梁高性能混凝土尽量不出现裂缝.     

Fairness of extra-gain guilty in performance of supply chain and contract design

Considering a one-supplier and two-retailer supply chain setting in which the supplier makes contacts with retailers in sequence based on FCFS(first–come–first-service) principle, the authors investigate the marginal effect of extra-gain guilty fairness concerns of supply chain members on the contract design, supply chain's profit and profit distribution. When the supplier considers distributional fairness of loss aversion and extra-gain guilty, extra-gain guilty concern reduces the optimal wholesale and retail price, and improves supply chain performance. When the first or the second retailer considers distributional fairness and peer-induced fairness, extra-gain guilty concerns decrease the optimal wholesale and retail price but increase the profit of all supply chain members only when the level of loss aversion is large enough and the level of extra-gain guilty is less than 1/2. However, when the level of loss aversion is small and the level of extra-gain guilty is less than 1/2, extra-gain guilty has no influence on supply chain performance. The analysis reveals that the supply chain performance can be further improved by considering fairness of extra-gain guilty.     

A novel process for comprehensive utilization of vanadium slag

Traditional processes for treating vanadium slag generate a huge volume of solid residue and a large amount of harmful gas, which cause serious environmental problems. In this study, a new process for the comprehensive utilization of vanadium slag was proposed, wherein zeolite A and a V₂O₅/TiO₂ system were synthesized. The structural properties of the as-synthesized zeolite A and the V₂O₅/TiO₂ system were characterized using various experimental techniques, including X-ray diffraction, X-ray fluorescence, scanning electron microscopy, and infrared spectroscopy. The results reveal that zeolite A and the V₂O₅/TiO₂ system are successfully obtained with high purity. The results of gas adsorption measurements indicate that the prepared zeolite A exhibits high selectivity for CO₂ over N₂ and is a candidate material for CO₂ capture from flue-gas streams.     

The effect of corporate governance on debt financing cost of listed companies

In recent years,bank credit business is booming with the increasing borrowing intention of China’s listed companies,and debt financing has become the major approach among listed companies’financing strategies.As a series of institutional arrangements about rights,responsibilities and benefits between different shareholders,corporate governance mechanism has a significant influence on the cost of debt financing.This paper employs variable coefficient panel data model to investigate the relationship of the listed company’s debt financing costs and corporate governance mechanism in terms of structural characteristics and time series characteristics.The results show that optimizing the structure of both Board of Directors and Board of Supervisors,establishing a reasonable management incentive system and reducing the concentration of ownership properly can directly contribute to a lower company’s debt financing costs.Meanwhile,property rights have an interactive influence on corporate governance from four aspects,which indirectly effect in company’s debt financing costs.     

地方立法监督方式科学化的现状与路径分析

由于种种原因,目前地方立法监督方式规范建设缺乏科学的体系性,没有具体的落实程序和机制,导致地方立法监督方式的独立价值没有获得表达。本文对具体的监督方式体系化和运行程序设计、多元监督主体的培育以及监督主体责任机制建设等问题进行分析,为地方立法监督方式走向科学化提供理论依据。     

Scan Strategy in Electron Beam Selective Melting

In electron beam selective melting process, powder pushed-away phenomena and uneven temperature field are two main obstacles, which are greatly associated with the electron beam scan mode. In this paper, various scan strategies, including iterative scan mode, reverse scan mode, interlaced reverse scan mode, randomized block scan mode, and constant length scan mode, are investigated. The analyses for each scan strategy are presented based on the influence to the temperature field over the formation zone and the powder pushed-away phenomena. The most promising strategy, interlaced reverse scan mode, is approved by the ANSYS simulation and a two-dimensional scan experiment. The result shows interlaced reverse scan mode can improve the uniformity of the temperature field and reduce the powder pushed-away phenomena.     

几类Riccati方程的求解

根据黎卡提(Riccati)方程与二阶变系数微分方程的关系,给出了几个可用初等方法求解的黎卡提方程的类型,并通过实例说明所给类型的黎卡提方程的求解.     

谈“原画”与“概念设计”

动画片中的“原画”和游戏产业中的“概念设计”同属于设计范畴,二者互有区别.由于动漫产业市场的长期不规范,国内有很多公司和个人把“原画”和“概念设计”混为一谈,让设计师在设计产品时无从下手,同时也不利于中国动漫产业长期发展.本文分析了“原画”与“概念设计”的异同,从大众传播学的角度探讨了造成这种现状的社会根源.