俄罗斯聚丙烯腈纤维的阻燃研究

俄罗斯萨拉多夫国家技术大学致力于聚丙烯腈纤维的阻燃研究，对纤维进行阻燃性表面处理。原来采用二氨二甲基磷酸盐和火焰固化剂对聚丙烯腈纤维改性时，效果不够理想，后来添加了尿素和多糖。为了延缓燃烧，保持阻燃效果，实验用二氨二甲基磷酸盐、固化剂、尿素、多糖组成不同配比的溶液，对聚丙烯腈纤维进行浸渍，制取阻燃聚丙烯腈。改性后，纤维热分解过程比初始纤维慢，升温速度慢，伴随大部分焦化剩余物质，     

PVC木塑板材生产线成功研制——青岛顺德塑料机械有限公司助客户赢市场

目前，随着青岛顺德塑料机械有限公司通过引进国际塑料板材行业的最新技术结合自身的实践经验，开发出了系列木塑板生产线，包括PVC／PE木塑发泡板材生产线。据悉，该生产线是利用木粉、米糠、麦秸混上PVC／PE等原料加工而成的，所生产出的板材具有防火、防潮、阻燃等功能，广泛应用于建筑业、装修业，具有广阔的市场前景和持久的市场潜力。     

改性超细高岭土技术实现对接

近期，华东师范大学开发的改性煅烧超细高岭土制备技术与龙岩高岭土有限公司实现了项目对接，龙岩高岭土公司将采用低温煅烧干法有机改性生产高岭土。据介绍，改性后的高岭土具有补强、阻燃、阻隔远红外线、高绝缘、耐高温等功能，在造纸、塑料、橡胶、陶瓷、颜料、建材等行业有广泛用途。     

十二烷基硫酸钠改性氢氧化镁阻燃剂的实验研究

氢氧化镁具有阻燃、消烟、填充多种功能,是一种重要的无机环保型阻燃材料。实验采用十二烷基硫酸钠对氢氧化镁阻燃剂进行了湿法表面改性研究,对改性前后的氢氧化镁粉体进行了黏度、吸油值、堆积密度及红外光谱等表面物化性能表征,从而确定最佳的表面改性工艺条件。实验结果表明：对氢氧化镁的最佳改性时间为60 m in,改性温度为90℃,改性剂用量为2%。改性前后氢氧化镁粉体红外光谱图的对比分析显示氢氧化镁表面有新的化学键形成。     

改性塑料：研发与专业服务为本

改性塑料是指通用塑料经过填充、共混、增强等方法加工,使它们具有阻燃、高抗冲等性能。目前,改性塑料已成为塑料工业持续发展的新增动力,广泛应用于家电、汽车、电动工具、办公器材、电子电器、玩具等行业。我国改性塑料行业目前约有200万～300万t的年需求量,且在未来几年仍将保持15％的增长速度。但改性塑料行业的特点决定了只有研发能力突出,定位于专业服务的企业才能在改性塑料行业获得一席之地,并得到持续发展。     

新型阻燃材料的制备与表征

为了提高丙纶织物的阻燃性能,通过化学局和方法,在织物基体表面引入阻燃单体,通过对改性材料的结构进行表征,证明阻燃单体磷系阻燃剂（THPC）成功聚合在织物表面,本文还着重讨论了反应因素对基体增重率的影响。     

专利信息

一种增韧阻燃聚丙烯组合物及其制备方法公开号:1611537公开日:2005.05.04申请人:中国石油化工股份有限公司;中国石油化工股份有限公司北京化工研究院摘要:本发明提供了一种增韧阻燃聚丙烯组合物及其制备方法,涉及对聚丙烯树脂改性的技术领域。该聚丙烯组合物包含有聚丙烯树脂,1     

三氧化二锑阻燃剂的制备及表面改性研究

以三氯化锑为原料,采用水解法制备三氧化二锑,系统地研究了影响三氧化二锑产率的各种因素。为改善三氧化二锑与非极性聚合物材料结合力较差的情况,对三氧化二锑进行了表面改性研究,将其与氢氧化镁阻燃剂进行复配,研究了阻燃协效剂对软质PVC体系的阻燃性能的影响。实验结果表明,三氧化二锑的制备的最佳工艺条件是VHC l∶V无水乙醇=1∶1,反应温度是318 K,三氯化锑初始反应质量浓度为0.24 g/mL。改性后的三氧化二锑大大提高了软质PVC体系的阻燃性能。     

阵列处理器中改进几乎空白子帧算法的并行化实现

两层异构网络中出现的小区间干扰协调是当前异构网络干扰问题研究的热点。针对软件实现增强小区调度几乎空白子帧(ABS)的干扰方案存在处理数据量大、速度慢的缺点，基于可重构阵列结构提出了一种动态ABS干扰协调的并行化硬件实现方案。该算法在增强小区内根据用户数动态分配ABS比例，以改善小区边缘用户的信道容量，通过流水线的方式使用多个轻核处理元(PE)实现并行计算以提高运算效率。测试结果表明，使用12个PE同时调度实现算法的映射，运行1 983个周期，其性能比单个PE提升77.03%，该算法的并行计算能力得到显著提升，宏基站用户的吞吐量可以达到4.76 Mbit/s。     

PE：外资向右，本土向左

活跃的外资PE青睐TMT产业和服务业，财力稍逊的本土PE则偏好传统行业、科技型企业。外资PE喜投北京和上海企业，本土PE的投资则与其注册地关联度较高。外资和本土PE机构在投资方向上的有趣差异，为本土PE的成长提供了空间。而在PE本土化进程加速、人民币PE基金快速增加的背景下，本土PE的改变也显得更加迫切。     

高校体育档案管理平台的构建

加强高校体育档案管理有着重要的意义,在分析高校体育档案管理现状的基础上,针对存在的问题,提出了构建高校体育档案管理平台的设想：开展体育档案的重要性的宣传活动,加大对体育档案管理的投入,规范体育档案管理的流程和加强体育档案的信息化建设。     

Opening the Black Box: Power in Buyout Negotiations and the Moderating Role of Private Equity Specialization

The management buyout is an important exit strategy for small business owners. Negotiations of buyout deals have received little research attention to date. This is surprising given buyout negotiations' complexity giving rise to multiple issues that require consideration and often conflicting interests of deal parties. This paper examines perceived bargaining power in buyout negotiations between private equity (PE) firms and current owners who sell their business. We identify competition, expertise, and time pressure as key antecedents of PE firms’ perceived bargaining power and examine the moderating effect of PE firms' industry and size specialization in buyout negotiations. We use a sample of 176 respondents who each report on a particular buyout deal for a PE firm. The majority of respondents are seasoned PE professionals who held managing director or investment director positions.     

体育高考加试的应对策略

体育高考加试的重要性日见突出.为了应对这一节,高三体育教师必须采取合适的协调措施,预先解决突发状况的应对问题,并制定有效的学习策略.不权如此,还要引导学生做好相应的心理准备、训练学准备,等等.多管齐下,为体育高考加试的顺利完成打下扎实的基础.     

Cross-border private equity syndication: Institutional context and learning

Private equity (PE) has become an increasingly international phenomenon but there is a lack of research that looks at the process by which PE firms invest across borders. We aim to fill this gap in the literature by examining the role of institutional context and organizational learning as determinants of cross-border PE syndication. We examine these issues by studying the international expansion by later-stage UK PE investors into continental Europe over the period 1990 to 2006. Our results indicate that institutional context (in terms of the number of PE firms in the local environment and the presence of investment bankers in the local market) and organizational learning (in terms of the PE firm's experience in the host country; the PE firm's multinational experience; and the number of investment managers per portfolio company; but not the presence of local offices) are significantly related to the use of cross-border syndicates. Implications for theory and practice are suggested.     

陕西高职院校附属中专体育师资的现状调查分析

文章采用问卷调查法和数理统计法,对陕西省38所高职院校附属中专体育师资的现状进行调查分析,结果表明:陕西省高职院校附属中专体育师资的年龄、学历、职称结构不合理;针对这些问题,文章提出了相应的建议,为更好的开展中专体育教学提供理论依据.     

Reassessing the relationships between private equity investors and their portfolio companies

The scope and purpose of this special issue is to reassess the relationships between private equity (PE) investors and their portfolio companies in the light of the need for venture capital/ private equity (VC/PE) firms to adapt their strategies for value creation in the light of the recent financial crisis. We particularly focus upon VC/PE characteristics that differently contribute to portfolio firm performance. The papers presented in this special issue capture this aim in various ways, reflecting the heterogeneity of VC/PE investors and the firms in which they invest. We begin this introductory paper by providing a brief overview of each paper’s contribution. We articulate themes for an agenda for future research relating to the heterogeneity of investor types and the contexts in which they invest.     

Suppliers’ Participation in a Single Buyer Electronic Market

Business to business (B2B) is the fastest growing segment of the explosive growth of e-commerce. The purpose of this study is to identify internal factors which influence the supplier’s intention to adopt private exchange (PE), a single buyer side electronic market (EM). This study identified cost, flexibility, delivery, and quality as internal capabilities and investigated how these four factors influence suppliers’ participation in PE. The results of the study indicate the following: (1) suppliers do not believe that their capability to produce customized products for customers plays an important role in PE; (2) they still believe that standardized rather than engineered products would dominate the marketplace; and (3) a contractible factor like lower price, rather than non-contractible factors including superior flexibility of production capability, fast and reliable delivery, and quality, plays an important role in the PE.     

Private equity and entrepreneurial management in management buy-outs

Critics claim that short-term profit orientation and high deal price strategies of private equity (PE) firms can negatively affect the ability of management buyouts to initiate and sustain entrepreneurial management. This study investigates this claim by comparing effects of majority PE backed and other buy-outs at different levels of financial leverage on post buy-out increases in entrepreneurial management. We propose that PE can be used as an organizational refocusing device that simultaneously increases entrepreneurial and administrative management. We find that majority PE-backed buy-outs significantly increase entrepreneurial management practices. Furthermore, the increased financial leverage positively affects administrative management in management buy-outs. However, the effect of high financial leverage is larger for majority PE-backed buy-outs. These results support the notion that PE firms help buy-out companies develop ambidextrous organizational change: i.e. simultaneously develop entrepreneurial and administrative management practices. The findings have important implications for practitioners and policy makers.     

Financial Reporting Quality in Private Equity Backed Companies: The Impact of Ownership Concentration

We empirically show on a sample of 270 unquoted, private equity backed companies that the shareholder structure of private companies impacts the quality of their publicly available accounting information. More precisely, companies in which private equity (PE) investors have a high equity stake produce lower quality accounting information than companies in which PE investors have a low equity stake, after controlling for factors like company size and age. We explain our findings by arguing that PE investors with low equity stakes have a higher need for high quality accounting information whereas PE investors with high equity stakes have other means to closely monitor their portfolio companies. This paper has benefited form discussions with workshop participants at the Max Planck Institute. We specifically want to thank Lorraine Uhlaner and Mike Wright (guest editors), two anonymous referees as well as ignace De Beelde, Wouter De Maeseneire, Marc Deloof, Miguel Meuleman and Lloyd Steier for helpful suggestions. Part of this research was completed when Christof Beuselinck was an FWO Scholar at Ghent University. Financial support from the Fonds of Wetenschappelijk Onderzoek (Grant G.0012.02) is kindly appreciated. The usual disclaimer applies.     

Private equity investment decisions in family firms: The role of human resources and agency costs

This study examines decision making criteria that are employed by private equity (PE) investors selecting family firms. Hypotheses test the likelihood of investment based on family firm characteristics. Findings show that PE professionals take into account family-specific criteria, including human resources and opportunities to reduce agency costs. Furthermore, PE professionals prefer family firms that are already professionalized. This research contributes to the family firm literature on both a theoretical and a methodological level, exploring nonfamily succession routes and employing techniques— conjoint analysis for data collection and multilevel models for data analysis— that have seldom been used in this context.