China Datang Group Company attaches great importance to information security and has formulated a security strategy of "dual networks, dual computers, sub-zones, hierarchical protection and multi-layer defense&qu...China Datang Group Company attaches great importance to information security and has formulated a security strategy of "dual networks, dual computers, sub-zones, hierarchical protection and multi-layer defense" to strengthen network border security and divide the management information network into an information internal network and an information external network, Logical strong isolation policy is used between information internal and external networks, and information internal and external networks use physical isolation and independent server and desktop computer respectively. According to the transformation of internal and external network isolation in Bikou Power Plant, some problems and solutions of internal and external network isolation in some power enterprises are understood.展开更多
The existing literature on innovation concentrates mostly on large industrial firms and high-technology industries,whereas,little attention has been given to agribusiness.Empirical evidence regarding the driving force...The existing literature on innovation concentrates mostly on large industrial firms and high-technology industries,whereas,little attention has been given to agribusiness.Empirical evidence regarding the driving forces behind innovation in agribusinesses in developing countries,China in particular is scarce.This paper helps fill that void.It develops a framework in which innovation results from synergies between internal resources and external networks.This paper applies and tests the framework using 2003-2005 data from a panel survey of 32 leading agribusiness firms in Shandong Province,China.The empirical results indicate the importance of internal resources,external networks and the synergies between them.We find that R&D expenditures and the number of technical employees are internal resources that are both important to product innovation.Surprisingly,management quality is negatively related to the possession of a unique technology and new products as a proportion of all products.It is possible that management quality is associated with more formalization and rigidity in decision-making,hindering creativity and lengthening the new product development cycle.In order to develop innovative products,our results suggest that investing in R&D and hiring more technical staff may be more effective approaches than spending on managerial talent.展开更多
The stability of a class of delayed cellular neural networks （DCNN） with or without noise perturbation is studied. After presenting a simple and easily checkable condition for the global exponential stability of a d...The stability of a class of delayed cellular neural networks （DCNN） with or without noise perturbation is studied. After presenting a simple and easily checkable condition for the global exponential stability of a deterministic system, we further investigate the case with noise perturbation. When DCNN is perturbed by external noise, the system is globally stable. An important fact is that, when the system is perturbed by internal noise, it is globally exponentially stable only if the total noise strength is within a certain bound. This is significant since the stochastic resonance phenomena have been found to exist in many nonlinear systems.展开更多
A physical isolation system based on PCI (peripheral component interconnect),embedded with intelligence card technology, strong identity authentication technology and securityaudit, etc., is introduced. The system can...A physical isolation system based on PCI (peripheral component interconnect),embedded with intelligence card technology, strong identity authentication technology and securityaudit, etc., is introduced. The system can physically isolate the internaland external networks. Thehardware of the system, including PCI interface control circuits, network interface circuits andlogic control circuits, is designed to automatically adapt its operation speed and mode to thenetwork and securely isolate the internal and external networks; the software of the system,including the security strategy management module, the security audit module, the database recordexchanging module, the file exchanging module and the mail exchanging module, is designed toefficiently exchange and manage the data transference between the internal and external networks.Also the driver of the system is implemented with Windows driver development kits (DDK) based onNetwork Driver Interface Specification (NDIS). The prototype ofthe system developed has beenemployed in the Police Fire Protection Bureau of Hubei Province, which performs consistently andefficiently. The technological cruxes discussed have practical values for related subjects.展开更多
基于医院多业务接入复杂性与内外网协同需求,研究无线局域网(Wireless Local Area Network,WLAN)系统的拓扑架构、接入控制、调度机制及资源优化方法。阐述面向角色的动态接入控制策略,介绍覆盖建模与容量规划方法,并在仿真平台上构建...基于医院多业务接入复杂性与内外网协同需求,研究无线局域网(Wireless Local Area Network,WLAN)系统的拓扑架构、接入控制、调度机制及资源优化方法。阐述面向角色的动态接入控制策略,介绍覆盖建模与容量规划方法,并在仿真平台上构建典型场景,开展协同机制与传统机制的性能对比分析。分析结果表明,所提方案在吞吐量、时延控制、信道利用效率方面具有显著优势,具备良好的工程适用性与系统可扩展性。展开更多
文摘China Datang Group Company attaches great importance to information security and has formulated a security strategy of "dual networks, dual computers, sub-zones, hierarchical protection and multi-layer defense" to strengthen network border security and divide the management information network into an information internal network and an information external network, Logical strong isolation policy is used between information internal and external networks, and information internal and external networks use physical isolation and independent server and desktop computer respectively. According to the transformation of internal and external network isolation in Bikou Power Plant, some problems and solutions of internal and external network isolation in some power enterprises are understood.
文摘The existing literature on innovation concentrates mostly on large industrial firms and high-technology industries,whereas,little attention has been given to agribusiness.Empirical evidence regarding the driving forces behind innovation in agribusinesses in developing countries,China in particular is scarce.This paper helps fill that void.It develops a framework in which innovation results from synergies between internal resources and external networks.This paper applies and tests the framework using 2003-2005 data from a panel survey of 32 leading agribusiness firms in Shandong Province,China.The empirical results indicate the importance of internal resources,external networks and the synergies between them.We find that R&D expenditures and the number of technical employees are internal resources that are both important to product innovation.Surprisingly,management quality is negatively related to the possession of a unique technology and new products as a proportion of all products.It is possible that management quality is associated with more formalization and rigidity in decision-making,hindering creativity and lengthening the new product development cycle.In order to develop innovative products,our results suggest that investing in R&D and hiring more technical staff may be more effective approaches than spending on managerial talent.
基金the National Natural Science Foundation of China(No.10771155)the Special Foundation for the Authors of National Excellent Doctoral Dissertations of China(FANEDD)
文摘The stability of a class of delayed cellular neural networks （DCNN） with or without noise perturbation is studied. After presenting a simple and easily checkable condition for the global exponential stability of a deterministic system, we further investigate the case with noise perturbation. When DCNN is perturbed by external noise, the system is globally stable. An important fact is that, when the system is perturbed by internal noise, it is globally exponentially stable only if the total noise strength is within a certain bound. This is significant since the stochastic resonance phenomena have been found to exist in many nonlinear systems.
文摘A physical isolation system based on PCI (peripheral component interconnect),embedded with intelligence card technology, strong identity authentication technology and securityaudit, etc., is introduced. The system can physically isolate the internaland external networks. Thehardware of the system, including PCI interface control circuits, network interface circuits andlogic control circuits, is designed to automatically adapt its operation speed and mode to thenetwork and securely isolate the internal and external networks; the software of the system,including the security strategy management module, the security audit module, the database recordexchanging module, the file exchanging module and the mail exchanging module, is designed toefficiently exchange and manage the data transference between the internal and external networks.Also the driver of the system is implemented with Windows driver development kits (DDK) based onNetwork Driver Interface Specification (NDIS). The prototype ofthe system developed has beenemployed in the Police Fire Protection Bureau of Hubei Province, which performs consistently andefficiently. The technological cruxes discussed have practical values for related subjects.
文摘基于医院多业务接入复杂性与内外网协同需求,研究无线局域网(Wireless Local Area Network,WLAN)系统的拓扑架构、接入控制、调度机制及资源优化方法。阐述面向角色的动态接入控制策略,介绍覆盖建模与容量规划方法,并在仿真平台上构建典型场景,开展协同机制与传统机制的性能对比分析。分析结果表明,所提方案在吞吐量、时延控制、信道利用效率方面具有显著优势,具备良好的工程适用性与系统可扩展性。
