黄瓜青枯病内生拮抗菌株HE-1的初步鉴定及培养优化条件

根据形态和生理生化特征,初步确定了HE-1菌株的分类地位。光学显微镜下观察到菌体为杆状,革兰氏染色阳性,产芽孢。生理生化鉴定结果表明,各项试验均与巨大芽孢杆菌(Bacillus megaterium)的标准菌株结果一致。采用正交试验确定了HE-1菌株的培养基添加成分最优组合为:(NH4)2SO44g/L,K2HPO4 KH2PO4(28 12)g/L,柠檬酸三钠0.5g/L。添加成分最优组合的细菌培养与基础培养基比较,产量增加约68.8%,能极显著地促进HE-1菌株的生长。研究了温度等主要理化因素对HE-1菌株的影响,结果显示,在初始pH7的培养基中,培养温度为35℃、培养时间为36h时,HE-1菌株的生长量和抑菌效果最佳。     

人文社科领域科研项目立项评价的指标体系研究

人文社科领域科研项目的立项评价是项目选择和确定的重要依据,是项目进行的基础和前提,在项目评价过程中起关键作用.根据指标设计的基本原则构建了立项评价的指标体系,并设置了指标权重.为克服以往定性分析的不足,应用综合评分法将定性和定量相结合,描述了具体的计算过程,为科研项目的立项评价提供了一种简易可行的方法,对科研项目的实际操作具有重要的指导意义.     

基于供应链的知识管理系统构建及功能分析

分析了供应链管理对企业的重要性、知识共享对供应链管理的重要性,进一步提出了基于Internet/Extranet/In-tranet角度、功能角度、多Agent和Ontology角度的供应链知识管理系统并对其功能进行了简单介绍。     

Observer-based sliding mode control for a class of discrete systems via delta operator approach

In this paper, an observer-based sliding mode control (SMC) problem is investigated for a class of uncertain delta operator systems with nonlinear exogenous disturbance. A novel robust stability condition is obtained for a sliding mode dynamics by using Lyapunov theory in delta domain. Based on a designed sliding mode observer, a sliding mode controller is synthesized by employing SMC theory combined with reaching law technique. The robust asymptotical stability problem is also discussed for the closed-loop system composed of the observer dynamics and the state estimation error dynamics. Furthermore, the reachability of sliding surfaces is also investigated in state-estimate space and estimation error space, respectively. Finally, a numerical example is given to illustrate the feasibility and effectiveness of the developed method.     

Longitudinal trends in networks of university-industry-government relations in South Korea: The role of programmatic incentives

This study examines the longitudinal trend of systemness in networked research relations in South Korea using a triple helix (TH) indicator of university-industry-government (UIG) relations. The data were harvested from the Science Citation Index (SCI) and its counterparts in the social sciences (SSCI) and the arts and humanities (A&HCI). The total number of Korean SCI publications has grown rapidly since 1965. However, the TH indicator shows that the network dynamics have varied considerably according to the research policies of the national government. The collaboration patterns, as measured by co-authorship relations in the SCI noticeably increased, with some variation, from the mid-1970s to the mid-1990s. However, inter-institutional collaboration in the first decade of the 21st century was negatively influenced by the new national science and technology (S&T) research policies that evaluated domestic scientists and research groups based on their international publication numbers rather than on the level of cooperation among academic, private, and public domains. The results reveal that Korea has failed to boost its national research capacity by neglecting the network effects in science, technology, and industry.     

以第四方物流带动现代物流体系建设——以宁波市为例

本文以宁波市第四方物流市场建设实践为例,阐明第四方物流市场建设需破解的难题,指出宁波第四方物流市场建设的创新性做法和示范作用,提出了具有中国特色的"政府主导启动第四方物流,带动第三方物流,进而推动整个现代物流体系建设"的新路径.     

浅淡采煤机液压系统污染的控靛

采煤机液压系统的污染,会导致泵、阀等元件的早期磨损和滤油器的堵塞,不但增加了维修、管理工作,同时也缩短了元件的寿命。严重时,甚至会使元件卡死从而影响整机运行。本文叙述了采煤机液压系统污染的种类及污染原因,以及控制方法。     

安全受控系统在石油化工企业的应用

本文针对石油化工企业安全管理的难点和薄弱环节,建立一套适合石油化工企业HSE管理特点的企业安全受控系统。并通过在石油化工企业的设计与实施,真正实现“人员、设备、工艺、作业和操作要受控”的目的,为石油化工企业的安全管理提供了有利的科技支撑。     

我国海洋蓝碳交易机制及其制度创新研究

通过对蓝碳相关理论一手文献的分析,明确蓝碳交易的研究进展.基于国际国内双重视角,运用归纳分析及学科交叉等方法,研究梳理国际蓝碳议题的发展现状以及我国蓝碳建设的实践历程,发现既有制度存在海洋生态系统服务付费制度推进缓慢、交易各环节的市场监管及环境监管机制尚不健全等现实困境.研究结果表明,建立以持续发展为导向的蓝碳交易市场...     

音视频传输系统中的网络融合

基于音视频系统对IT技术的需求,分析在进行AV传输系统设计中,重点考虑网络拓扑结构、服务质量管理、PTP时钟三个问题。