蓝牙路由机制

蓝牙路由机制（BRS）基于最新蓝牙协议规范,并对之进行了改进,可提供可靠的链路,使蓝牙移动终端漫游切换时间大大减少,使网络突破10米的限制。BRS还具有一定的灵活性和扩展性,可实现BRS系统之间、与LAN/WAN之间的路由。     

基于Android的智能监控系统研究与设计

文中研究的主要内容是:将定位导航技术应用到智能终端监控领域。期望借助定位导航技术,能够更加便捷规范地监控现场设备和管理现场数据,实现对设备和数据的标准化、规范化管理。为此目的,提出了建立Android智能监控系统的方案。该方案的主要目的就是要实现对现场设备进行远程监控。通过定位导航信息,用户可以很便捷地确定现场设备分布情况,同时,通过网络通信,用户可以查看每一个现场设备的实时数据和工作状况,规范化管理现场设备的数据。这就可以避免数据来源不够清晰、实时状况不够明了的弊端[1]。     

Conservative allocation models for outbound containers in container terminals

This paper examines location assignment for outbound containers in container terminals. It is an extension to the previous modeling work of Kim et al. (2000) and Zhang et al. (2010). The previous model was an “optimistic” handling way and gave a moderate punishment for placing a lighter container onto the top of a stack already loaded with heavier containers. Considering that the original model neglected the stack height and the state-changing magnitude information when interpreting the punishment parameter and hid too much information about the specific configurations for a given stack representation, we propose two new “conservative” allocation models in this paper. One considers the stack height and the state-changing magnitude information by reinterpreting the punishment parameter and the other further considers the specific configurations for a given stack representation. Solution qualities for the “optimistic” and the two “conservative” allocation models are compared on two performance indicators. The numerical experiments indicate that both the first and second “conservative” allocation models outperform the original model in terms of the two performance indicators. In addition, to overcome computational difficulties encountered by the dynamic programming algorithm for large-scale problems, an approximate dynamic programming algorithm is presented as well.     

The Terminal-Oriented Ship Stowage Planning Problem

The Ship Stowage Planning Problem is the problem of determining the optimal position of containers to be stowed in a containership. In this paper we address the problem considering the objectives of the terminal management that are mainly related to the yard and transport operations. We propose a Binary Integer Program and a two-step heuristic algorithm. An extensive computational experience shows the efficiency and effectiveness of our approach. A classification scheme for stowage planning problems is also provided.     

基于多信道预约的传感器网络MAC协议研究

针对传感器网络中三重隐终端问题,提出了一种基于自适应占空比的多信道MAC协议—MCR,MCR通过多信道预约机制高效地解决了该问题。在理论分析中,通过最小化节点平均信道切换次数的下界得出了节点的最优占空比。为验证MCR中多信道预约和自适应占空比机制的性能,进行了模拟和真实实验,实验结果表明,与其他MAC协议相比,随着信道数及网络负载的增加,MCR提高了网络吞吐量,降低了传输所消耗的能量。     

Kaempferol 3-Rhamnoside on Glutamate Release from Rat Cerebrocortical Nerve Terminals Involves P/Q-Type Ca2+ Channel and Ca2+/Calmodulin-Dependent Protein Kinase II-Dependent Pathway Suppression

Excess synaptic glutamate release has pathological consequences, and the inhibition of glutamate release is crucial for neuroprotection. Kaempferol 3-rhamnoside (KR) is a flavonoid isolated from Schima superba with neuroprotective properties, and its effecton the release of glutamate from rat cerebrocortical nerve terminals was investigated. KR produced a concentration-dependent inhibition of 4-aminopyridine (4-AP)-evoked glutamate release with half-maximal inhibitory concentration value of 17 µM. The inhibition of glutamate release by KR was completely abolished by the omission of external Ca²⁺ or the depletion of glutamate in synaptic vesicles, and it was unaffected by blocking carrier-mediated release. In addition, KR reduced the 4-AP-evoked increase in Ca²⁺ concentration, while it did not affect 4-AP-evoked membrane potential depolarization. The application of selective antagonists of voltage-dependent Ca²⁺ channels revealed that the KR-mediated inhibition of glutamate release involved the suppression of P/Q-type Ca²⁺ channel activity. Furthermore, the inhibition of release was abolished by the calmodulin antagonist, W7, and Ca²⁺/calmodulin-dependent protein kinase II (CaMKII) inhibitor, KN62, but not by the protein kinase A (PKA) inhibitor, H89, or the protein kinase C (PKC) inhibitor, GF109203X. We also found that KR reduced the 4-AP-induced increase in phosphorylation of CaMKII and its substrate synapsin I. Thus, the effect of KR on evoked glutamate release is likely linked to a decrease in P/Q-type Ca²⁺ channel activity, as well as to the consequent reduction in the CaMKII/synapsin I pathway.     

GB 17743-2007与GB 17743-1999差异解析

文章详细介绍了GB17743标准新旧版本在内容上的差异,并对新版标准的理解提出自己的见解。     

Topological conditions for solvability of pseudo-tearing subnetwork

The problem for the solvability of pseudo-tearing subnetwork is one of the essential investigations of network theory. The results presented would be not only mathematical conditions but also topological conditions for subnetwork solvability. These conditions are necessary and almost sufficient. It should guide one intuitively to the design of accessible nodes. This project supported by national Natural Science Foudation of China     

环境温度对骚扰电压和谐波测试结果的影响

选取变频空调、定频空调等不同样品,在不同的环境温度下对其谐波和电源端骚扰电压进行测量,发现谐波值和骚扰电压值随环境温度的变化有很大的不同.电磁兼容工程师对此类设备进行检测时应给予高度的关注.