Method for the Determination of Sudan Dyes in Foods-High Performance Liquid Chromatography Jointly Issued by AQSIQ and SAC

Sudan Red are the chemosynthesis dyes of series of azo, which are mainly used as coloring additives in ma- nufacturing of some products, such as the wax, the oil-dyes, the petrol, and etc. In the process of food production, Sudan Dyes are banned to be used as food dyes in our country.

Determinants of Joint Venture Performance in Cambodia

This study reviews important variables related to joint venture performance and identifies the key determinants of joint venture performance in Cambodia. A model of joint venture performance in Cambodia is proposed and tested. Finally guidelines for successful joint venture performance in Cambodia are proposed. Based on a study of 62 firms and interviews with 19 joint venture mangers and government officers, it was found that the most important factors driving the formation of a joint venture included access to an emerging new market, utilization of abundant and cheap labor, and existence of government incentives. The most serious obstacles to joint venture performance in Cambodia were corruption, lack of physical infrastructure, bureaucracy, and competition from a black market and smuggling. For the results indicate there are significant correlations between performance and trust, control, commitment, and ownership. Suggested guidelines to improve joint venture performance in Cambodia are proposed.

Nonlinear dynamic analysis and fatigue damage assessment for a deepwater test string subjected to random loads

The deepwater test string is an important but vulnerable component in offshore petroleum exploration,and its durability significantly affects the success of deepwater test operations.Considering the influence of random waves and the interaction between the test string and the riser,a time-domain nonlinear dynamic model of a deepwater test string is developed.The stress-time history of the test string is obtained to study vibration mechanisms and fatigue development in the test string.Several recommendations for reducing damage are proposed.The results indicate that the amplitude of dynamic response when the string is subjected to random loads gradually decreases along the test string,and that the von Mises stress is higher in the string sections near the top of the test string and the flex joints.In addition,the fatigue damage fluctuates with the water depth,and the maximum damage occurs in string sections adjacent to the lower flex joint and in the splash zone.Several measures are proposed to improve the operational safety of deepwater test strings：applying greater top tension,operating in a favorable marine environment,managing the order of the test string joints,and performing nondestructive testing of components at vulnerable positions.

Influence of Al foil interlayer on performance of vacuum diffusion bonding joint of 6061 aluminium alloy

The vacuum diffusion bonding method was used to introduce Al foil as the middle layer,and 6061 aluminium alloy was vacuum diffusion bonding together.The typical microstructure characteristics and mechanical properties of 6061/Al/6061 welded joints were studied in detail,the effects of process parameters and Al intermediate layer on the microstructure and mechanical properties were revealed,and the diffusion bonding mechanism of 6061/Al/6061 welded joints was described.Al foil middle layer welded joint had the best performance at the temperature of 540℃,the holding time of 120 min,and the welding pressure of 4 MPa.The bonding ratio is 95.91%,the shear strength is 79 MPa,and the deformation rate is 8.05%,and the introduction of Al intermediate layer improves the element distribution and microstructure,so that the bonding ratio of the welded joint is increased by 10.86%,the shear strength is increased by 5.55 MPa,and the deformation rate is reduced by 1.58%.The fracture morphology has typical ductile fracture characteristics.

Autonomic Performance and Power Control on Virtualized Servers:Survey, Practices, and Trends

Modern datacenter servers hosting popular Internet services face significant and multi-facet challenges in performance and power control. The user-perceived performance is the result of a complex interaction of complex workloads in a very complex underlying system. Highly dynamic and bursty workloads of Internet services fluctuate over multiple time scales, which has a significant impact on processing and power demands of datacenter servers. High-density servers apply virtualization technology for capacity planning and system manageability. Such virtuMized computer systems are increasingly large and complex. This paper surveys representative approaches to autonomic performance and power control on virtualized servers, which control the quality of service provided by virtualized resources, improve the energy efficiency of the underlying system, and reduce the burden of complex system management from human operators. It then presents three designed self-adaptive resource management techniques based on machine learning and control for percentile-based response time assurance, non-intrusive energy-efficient performance isolation, and joint performance and power guarantee on virtualized servers. The techniques were implemented and evaluated in a testbed of virtualized servers hosting benchmark applications. Finally, two research trends are identified and discussed for sustainable cloud computing in green datacenters.