黑龙江森工林区现代化发展评价

通过借鉴区域现代化和林业现代化以及可持续发展的指标体系,设计国有林区现代化发展特殊的评价指标体系,对黑龙江森工国有林区现代化发展水平进行实证分析。黑龙江森工林区仍处于现代化的前期,制约林区现代化的因素主要是经济和社会两个方面,针对制约因素,提出推进林区现代化进程的建议。     

浅谈侵犯商业秘密罪的立法缺陷及其完善

随着知识经济的发展,各国越来越重视对商业秘密的保护。我国1997年《刑法》明文规定了侵犯商业秘密罪便是此趋势的体现。但是这一规定是否科学,完备仍有探讨的价值与余地。一、刑法中对商业秘密的界定侵犯商业秘密罪所侵犯的直接客体是商业秘密权利人对于商业秘密的各种权利,其侵犯的对象就是商业秘密。所以,如何界定商业秘密对于认定侵犯商业秘密罪有重要意义。各国立法及学说对商业秘密的定义纷繁芜杂。美国《经济间谍法》第1839条规定:“所谓商业秘密是指各种形式与类型的财务、商务、科学、技术、经济或工程信息。包括资料、计划、工具…     

对城市更新融资体系的几点思考

历经30年的改革开放,中国正面临着城市空间资源再生、再分配的问题,需要进行城市更新。在此过程中,城市更新投融资需求的快速增长与供给短缺的矛盾日益突出。尤其在当前我国执行货币紧缩政策的形势下,拓展、拓宽融资渠道显得尤为迫切。为了寻找解决这一矛盾的办法,本文希望通过对国内外城市开发建设、企业经营等在投融资方面成功经验的总结,结合我国特有的经济发展背景,总结对我国城市更新投融资制度建设的经验启示。在此基础上,本文进一步研究提出我国城市更新投融资制度建设的思路与构想,从而为城市更新投融资服务体系的进一步构建和完善奠定一定的基础,最后对我国城市更新的投融资体系建设提出建议。     

法制环境、金融发展与企业长期债务融资

本文分别从长期负债比率和债务期限结构两个方面,从法与金融的视角考察了我国地区法制环境、金融发展以及它们之间的相互作用对上市公司长期债务融资的影响。研究结果表明:我国地区法制环境的改善并不能使上市公司获得更多的长期债务融资,地区法制环境和金融发展的水平越高,上市公司获得的长期债务融资越少,然而在法制环境比较好的地区,金融发展水平的提高却有助于上市公司获得更多的长期债务融资。本文的研究结果不仅丰富了国内外的研究成果,而且有助于我们更加深入地了解我国上市公司长期债务融资偏低的制度因素。     

An inexact l2-norm penalty method for cardinality constrained portfolio optimization

Abstract

We analyze and solve a single-period portfolio optimization problem with non-convex constraints, which address practical concerns of investment such as the active share weights of sectors and the number of stocks held in a portfolio. We reformulate the problem to simplify the computation and propose an inexact l₂-norm penalty method to solve the problem.     

典型场景下换电重卡的技术经济性分析

换电重卡能够解决新能源重卡购置成本高、充电时间长等痛点,对于加快我国货车电动化进程具有重要意义。但是,受制于车辆换电成本高、续驶里程短等因素,换电重卡的推广应用需具备合适的应用场景和一定的政策支持。为研究换电重卡的适用场景与应用范围,本文构建了多个典型场景下换电重卡的技术经济性模型,分析了影响换电重卡使用阶段经济性的主要因素。结果表明,对换电重卡经济性影响最大的因素是电池综合服务费;在中长途运输场景下,载货量对换电重卡经济性的影响同样明显;碳交易制度对换电重卡的经济性影响则较为有限。为推动换电重卡的发展,政策层面应给予换电重卡更多支持,降低换电重卡购置成本与运营成本,同时给予换电重卡更多政策便利条件,促进换电重卡的推广应用。     

Do ongoing networks block out new friends? Reconciling the embeddedness constraint dilemma on new alliance partner addition

Research Summary: This study addresses a theoretical dilemma regarding how alliance network constraint (reflected by network cohesion) affects a firm’s alliance formation with new partners. Using a network pluralism approach, we separate a firm’s ego alliance network into two activity‐based networks—an exploratory network and an exploitative network—based on the primary value chain activity involved in each alliance. We argue that the cohesion of exploratory or exploitative networks has an inverted U‐shaped effect on the addition of new partners in the same activity‐based network, and a positive effect on the addition of new partners in the other network. Results based on data from the biotechnology industry largely support our predictions with one exception. Our study contributes to both scholarly understanding of network embeddedness and alliance practice. Managerial Summary: The structure of firms’ ongoing alliance networks may have paradoxical implications for their efforts to search for and form alliance with new partners. That is, when a firm’s alliance partners are tightly connected with each other, the cohesive network tends to both encourage and impede the focal firm to add new partners. We resolve this dilemma by showing that when a firm is deeply entrenched in a cohesive alliance network conducting a certain type of activities (e.g., R&D activities), it may not easily add new R&D alliance partners. However, it may still be able to escape from the cohesive R&D alliance network by seeking new partners conducting other activities (e.g., manufacturing activities).     

Learning design and technology through social networks for high school students in China

The subject of design and technology was introduced to the curriculum for high schools in China 10 years ago. However, the teaching and learning of this subject have become difficult for both teachers and students because there is a lack of qualified teachers with design background to deliver this subject in a way to stimulate the learning interests of the students. This paper presents a research that is aimed at improving this situation by integrating the teaching and learning of design and technology within a computational environment as part of social networks sites. The purpose is to enable the collaboration among the students and interaction between teachers and students. In this research, a series of investigations were conducted, by following through several taught subjects in design and technology in prominent high schools in China. Based on these investigations, a theoretical framework for web-based design learning and teaching system in the style of social networking is developed, implemented and tested, emphasizing three features of design: innovation, collaboration, and interaction. This framework has been tested among high school students and teachers in a high school in Nanjing. It identified and validated necessary techniques and design features required to make an education-related social networking site effective and affective for the students and teachers. The results of this research indicated that social networking sites have significantly positive values in design education, especially for the collaboration and interaction on the subject of design and technology.     

八面台油田翻斗计量影响因素研究

八面台油田是一个特低渗透率热水掺输集油流程的低产油田,投入开发以后单井采用的计量方式主要有：单井罐检尺计量、远传示功图折产、玻璃管量油、计量车井口量油、翻斗量油．其中翻斗计量方式应用最为广泛。重点对影响翻斗计量准确性的各种因素进行了研究,针对存在的问题,提出了相应的改进意见。     

气井产能的模糊综合评价

气井产能作为一个表示动态特征的参数,是气井评价的重要指标之一。依据测井数据进行产能评价,采用模糊数学中的模糊多目标决策综合评判建立了气井产能评价模型,通过对已分好类的气井建立贝叶斯判别函数,对其进行回判,并且通过实例进行验证,为气井产能评价方案提供了理论依据。