Aiming at the defects of traditional shelf life monitoring system based on serial port or radio,a monitoring system based on embedded Web service is designed,and shelf life indicator provide remaining shelf life information to customer.All devices have unique IPv6 address that allows remote networking device can access it directly.The method based on Web service is convenient for the third party applications to integrate,update and extend.Experimental results show that the indicator response web service request speedily,high efficiency and the data format is convenient for application program integration.

Heterogeneous multi-core processors are attractive for power efficient green computing because of their ability to meet varied resource requirements. The multi-level memory hierarchy of Cell Broadband Engine Architecture (CBEA) which requires explicit management by software poses significant challenges to performance increasing and programming. In this paper, with analysis of characteristic of the architecture, we implemented four access methods and a corresponding access library with a uniform memory access interface. Besides getting performance boosts beyond current level technology, the memory access library with uniform access interface could collect profile information of memory management for further performance optimization. Experimental results show the performance of proposed method is better than related works and profile information provided by the method is helpful for programmer to optimize application performance.

According to the video records of spatial distribution of individuals in the fish school taken in the lab,the distances among individuals in fish school measured and calculated by the body-centroid method(BCM),segment method(SM) and broken line of three point method(BLM) indicate that the most of distances are varied in the range of 0.5-2 times body length(BL) while the number of individuals increasing to a certain level.The results by SM were basically same as the one from BLM,and the precision of BCM was lower than the others.When the body length was greater than 0.2 BL,the frequency of distance appearance of BLM was generally higher than SM’s and its result was more precise.And the distances calculated by means of the SM and BLM were mostly allocated in the range of 0.6-0.8 BL,which revealed that the range might be the preferred distance of the fish.

In order to tune performance of thread-based cloud computing in shared memory,this paper proposes a performance test method for shared memory MapReduce cloud computing.Based on Oprofile,it collects the performance data from application logic dynamic shared library and the kernel system call.Valgrind and Ptrace are used to evaluate memory system and monitor the system calls invoked by application.Experimental results show that the proposed method can analyze the application performance form different levels,and find performance bottleneck in the application.

碳金融组织服务体系的发展壮大不但是我国国内碳金融市场的需要,也是参与国际市场、争取未来碳市场话语权的硬件条件。本文立足于我国碳金融市场现状分析了中国碳金融组织服务体系存在的问题,并从绿色引导基金、银行业的碳金融服务、注册与结算平台、专业的方法学研究机构、本土的碳咨询机构、碳信用评级机构六个方面提出了建议。

The molecular dynamics tool usually employs a neighbor list that contains the particle pairs for which non-bonded forces would be calculated. Though accessing to the array of atoms' position and force does not exhibit a cache friendly pattern on a computer during the nonbonded force calculation, the neighbor list could be referred as a directive for the memory access. Designing specific data prefetching policy according to the neighbour list which was generated before the calculation can reduce the latency of memory access and improve the molecular dynamics simulation process. In this paper, an optimization memory access method referred by particle neighbor list based on CBEA was proposed. The experimental result shows that the proposed method reduces the latency of memory access and improves performance of the molecular-dynamics-based chemical simulation greatly.

Aiming at the requirement that an stream cipher should have a good self-correlation,this paper proposes the concept of multinomial relation bias.Through access to the linear terms of key stream,by using Gauss elimination method,9 multinomial relation polynomials of Trivium are found and the max bias can reach to 2 ?72,which is obtained by probability test.The difficulty of distinguishing attack on Trivium is illustrated.

This paper presents the methods for exploring fish schooling behavior by means of mathematical modeling and computer simulation,to explore and find out the major factors which have speculated influence on the space distribution of individuals in fish school. Preliminary findings indicated that among the factors of visibility and swimming ability etc.,the visual ability of fish,including sighting distance and perspective is the factor having stronger influence on the school structure,which provides some revelations or indications to the fish behaviour experiments design and observation. The comparison between the simulation and video records of Hemigrammus bleheri shows that the model based on IBMs theory is feasible,and the simulation results are similar to the actual movement of fish school,which indicates that the visual simulation technology helps better exploration and understanding on fish group motion.