SDN-Empowered Reliable and Dynamic Scheduling Scheme for Security Resources

By endowing network with the ability of reliable scheduling of security resources, it can realize the dynamic deployment of security resources as well as the efficient configuration of protection resources, and further can quickly respond to network security threats and emergencies timely. Furthermore, due to the network is increasingly complex, it is of great importance to make it reliable by invoking appropriate security resources. However, the security mechanism and response speed of traditional network based on security domain division, network boundary protection are hard to meet the requirements of the virtual network. In this paper, we propose the SDN-empowered reliable and dynamic scheduling scheme for security resources. In the scheme, we use network security resource virtualization technology to virtualize and modularize network security software and hardware resources; at the SDN control layer, we propose meta-security function combination technology to provide on-demand customization for various security applications’ security service; by using role-based conflict detection and conflict resolution technology, we can detect and handle security rule conflicts. The experiments show that the scheme is reliable and efficient with low latency and great throughput.

Advances in application of nanomaterials in remediation of heavy metal contaminated soil

Soil heavy metal pollution has become an environmental problem that has attracted worldwide attention. Nanomaterials have the advantages of large specific surface area, strong adsorption capacity and high reactivity, making nanomaterials remediation technology an excellent application prospect in contaminated soil remediation. This article introduces the main classification of nanomaterials, summarizes the mechanism of nanomaterials to remove heavy metals, and the combination technology of nanomaterials. It provides a scientific reference for the further development of this field.

ECONOMIC EFFICIENCY OF RESOURCE-SAVING TECHNOLOGIES AND COTTON YIELD OF ANDIJАN-36 VARIETY

With the use of resource-saving agro-technology and processing with a new combination aggregate in autumn, cotton yield of 37.9-40.4 c/ha was obtained from the variants where the 50% annual rate of 200 kg/ha norm of nitrogen was applied in the form of liquid ammonia under the ridges and the remaining 50% of liquid ammonia was used during the growing period of cotton plant in the form of ammonium salt petre by stratification. In these variants cotton seeds were sown in single-row and double-row methods. They produced additional yield of 4.1-5.9 c/ha compared to the control variants and the highest economic efficacy was achieved. Net profit from these variants constituted 2079,1-2793.7 thousand sums, profitability rate was 52.3-68.4%, in comparison with control variants, the net profit was 1127,7-1569,3 thousand sums more while the profitability rate was 29,1%. - 38.8% higher. KEYWORDS: Soil, cotton plant, single-row and double-row, cotton productivity, new combination technology, Andijan-36 variety, liquid ammonia, net profit.

Determination of head addition incidence of (meth)acrylate and styrene in radical polymerization by RAFT block polymerization derivation and gradient polymer elution chromatography

Head addition incidences in RAFT polymerization can be calculated by a combination technology of RAFT block polymerization derivation and GPEC.