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A high rate of urbanization comes with high environmental costs, leading to reductions in biodiversity and ecosystem services (BES). How to maximize the efficiency and representation of BES in cities is of utmost urgency. However, in the process of spatial prioritization identification, it remains unclear whether a preference for ecosystem services (ES) promotes or detracts from biodiversity. In this...
With the increase of vehicles ownership in the society, traffic security problem stands out. This paper proposes a warning strategy of vehicles' driving safety based on the vehicles networking. Receive the motion information sent from the adjacent vehicles through network and determine the position of the adjacent vehicles relative to the local vehicle when they have a higher speed. The people can...
Sitagliptin phosphate, a novel DPP-IV inhibitor of T2DM, has been synthesized via 12 linear steps, in an overall yield of 26%. The key step is the coupling reaction of 2,4,5-trifluorophenylmagnesium bromide with a chiral aziridine derivative, which was prepared from l-homo-serine by simple steps.
The general model of military software support cost is built and analyzed. Post Deployment Software Support (PDSS) is divided into two parts, one is Software Running Support (SRS), the other is Software Maintenance Support (SMS). The cost of SRS is broken down into units and the general expression of SRS cost is put forward. The COCOMOII (Constructive Cost Model) is introduced. Then, it is improved...
Traditional mobile system adopted centralized management manner and maintenance is complex. JXTA is a new technique coexisted with Client/Server computation mode. A kind of mobile SoftMan system based on JXTA is put forward in this paper. At first, it is compared with traditional mobile agent system, and then SoftMan mobile system architecture is analyzed and information transmission, reception and...
DV-Hop is a typical way for the range-free localization in wireless sensor network. Aiming at the enhanced positioning accuracy and coverage, a new kind of NDV-HOP positioning algorithm that all anchors' average intervals are involved in calculation and weight least square method is utilized is proposed in this paper. The result of the simulation shows its availability and better practicality.
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