基于粒子群算法的水下无线传感器网络路由策略研究

针对水下无线传感器网络能量消耗不均衡及生命周期短的问题,文章在LEACH协议的基础上提出了一种降低节点能耗,延长网络生命周期的水下路由协议算法。该协议将粒子群算法用于水下无线传感器网络的簇首路由优化中,同时考虑到节点的剩余能量、簇首节点到基站的距离和非均匀分簇等5个因素,确定最优传输路径,达到降低节点能耗,延长网络生存周期的目标。仿真结果表明,该协议极大地降低了网络能耗,提高了网络生存周期。     

基于改进Dijkstra的无线传感器网络分簇路由算法

提出一种基于改进Dijkstra的无线传感器网络分簇路由算法——DEuc，该算法在延长网络生存周期方面相比LEACH和EEUC分别提高约35％和25％。     

基于非合作博弈的无线传感器网络路由协议研究

无线传感器网络由大量低功耗的传感器节点组成,通过多跳的方式通信,各个节点协作对监测区域内的信息进行监测。将采集到的信息传送给基站节点。进行信息传输。随着物联网技术的兴起,作为物联网的信息采集端,无线传感器网络将有广泛的应用前景。由于网络节点能量有限,如何设计能量高效的路由协议,成为无线传感器网络中急需解决的关键问题。     

路由协议基础初探

路由器就是互联网中的中转站，网络中的数据包通过路由器转发到目的网络。在路由器的内部都有一个路由表，这个路由表中包含有该路由掌握的目的网络地址以及通过此路由器到达这些网络的最佳路径，如某个接口或下一跳的地址，正是由于路由表的存在，路由器可以依据它进行转发。     

基于IPv6任播地址解析协议及应用之研究

任播技术是一种新的网络应用。任播通信是支持导向服务地址的,但是目前IPv6中它的很多定义是模糊的,并且在控制路由方面没有达成一致的协议标准,因此节点间任播通信仍然无法实现。该文首先说明了基于IPv6的任播通信,及目前在该领域中存在许多可能的应用,并指出一些问题和与之对应的解决办法,随后介绍了一种使用特殊任播地址来建立TCP连接的任播地址解析协议,使得任播地址在适应已经存在的应用和高层协议时,不需要修改或者扩展的情况下更加有效。     

基于IPv6任播地址解析协议及应用之研究

任播技术是一种新的网络应用。任播通信是支持导向服务地址的,但是目前IPv6中它的很多定义是模糊的,并且在控制路由方面没有达成一致的协议标准,因此节点间任播通信仍然无法实现。该文首先说明了基于IPv6的任播通信,及目前在该领域中存在许多可能的应用,并指出一些问题和与之对应的解决办法,随后介绍了一种使用特殊任播地址来建立TCP连接的任播地址解析协议,使得任播地址在适应已经存在的应用和高层协议时,不需要修改或者扩展的情况下更加有效。     

基于CC2530的无线智能家居传感网的设计

文章提出一种基于Zig Bee协议的智能家居无线传感器网络。本无线传感网是由部署在监测区域内的5种传感器节点组成,通过2.4G无线通信形成一个多跳自组织网络系统,能够实时监测、感知和采集网络分布区域内监视对象的各种信息并加以处理,完成数据采集和监测任务。     

一种多跳无线网络动态拓扑模拟器的设计与实现

为了降低多跳无线通信网络拓扑模拟控制实现的复杂度、弥补传统方法中无法实现动态拓扑的缺陷,文章设计并实现了一种多跳无线网络拓扑模拟器。该模拟器根据网络拓扑生成MAC地址屏蔽消息,而无线节点则根据自动生成的iptables规则来过滤指定的数据包,实现网络拓扑构建,并能够根据具体要求实现拓扑更新。实验结果表明,无线多跳模拟器系统可以更加便捷地控制多跳无线通信网络拓扑,提高了在有限的实验室环境中构建复杂网络拓扑的可能性。     

议中ARP病毒的解决办法

AKP病毒并不是某一种病毒的名称,而是对利用ARP协议的漏洞进行传播的一类病毒的总称.AKP协议是TCP/IP协议组的一个协议,用于进行把网络地址翻译成物理地址(又称MAC地址).通常此类攻击的手段有两种:路由欺骗和网关欺骗.是一种入侵电脑的木马病毒.对电脑用户私密信息的威胁很大.     

激发潜能 创造人生

有个生物学家做了一个实验:他将一群跳蚤放入实验用的大量杯里,上面盖上一片透明玻璃。跳蚤的习性非常爱跳,于是很多跳蚤都撞上了盖上的玻璃,不断地发出叮叮咚咚的声音。过了一阵子,生物学家将玻璃片拿开,发现竟然所有的跳蚤依然在跳,只是都已经将跳的高度调至接近玻璃即止,以避免撞到头(大概这样既能满足跳跃的本性,又能不撞痛头)。结果竟然没有一只跳蚤能跳出来——依它们的能力不是跳不出来,只是它们已经适应了环境。     

Penetration and Post-infection Development of Meloidogyne Incognita on Tobacco as Treated by Rhizobacteria Pseudomonas Fluorescens Strain P-72-10

The bio-control potential of rhizospere bacteria Pseudomonas fluorescens against plant-parasite nematode had been demonstrated. P. fluorescens had shown the effect to enhance tobacco resistance to root-knot nematode Meloidogyne incognita. Inoculation with P. fluoreseens in tobacco could lead to significant reductions in the number of juveniles that penetrated tobacco root and further life stage development of the juveniles. The number of juveniles penetrated into tobac- co root in treatment with P. fluorescens is significantly different from CK at 2DAI, 6DAI, 8DAI and 10DAI. Significant reduction and delayed development of juveniles that penetrated into tobacco root and treated were observed in treatment at 14DAI, 21DAI, 28DAI and 35DAI. In addition, P. fluoreseens treatment leads to a significant reduction in the number of eggs per egg-mass at 35 DAI. The results show P. fluorescens induced a continuously suppression on root-knot nema- tode M. incognita throughout their entire early infection phase of root penetration, subsequent life stage development and reproduction.     

利用膜技术回收利用碱性废水研究进展

回顾了利用膜分离技术处理碱性废水的工艺与综合利用技术所取得的丰硕成果，总结了各种治理方法的特点、适用性及发展方向。     

Taxing Times in Indonesia: The Challenge of Restoring Competitiveness and the Search for Fiscal Space

Indonesia’s economic growth picked up slightly in mid-2016 but remains below the level demanded by government and popular aspirations. Despite a plethora of reforms intended to increase efficiency and productivity, some policies are perverse and longstanding problems of implementation remain. The share of manufacturing has declined, the real exchange rate has appreciated, exports have dwindled, and growth has been trending downwards. The banking sector is stable but inefficient, with wide net interest margins and numerous barriers to competition. Trade protection, particularly in basic food commodities, has created high costs that weigh particularly heavily on the poor. Declining government revenues have placed increasing pressure on the public budget, even as the current administration aims to increase spending on infrastructure and welfare and to enhance productivity. In an effort to increase revenues, the government has announced a tax amnesty program and other measures. In addition, Sri Mulyani Indrawati, the new finance minister, has taken steps to cut non-essential expenditure in order to secure high spending on infrastructure and at the same time keep within the 3% budget deficit limit stipulated by law. Although the overall debt situation is not yet alarming, declining revenues and budget cuts that do not fully reflect this decline are putting pressure on increasing debt levels. The government’s high-profile tax amnesty program was the major policy initiative implemented in the second half of 2016 that aimed to relieve this pressure. Despite widespread criticism of, and scepticism about, the tax amnesty (both within and outside Indonesia), its first phase had a much higher participation rate than most independent accounts expected. Revenues raised so far through the amnesty are less than 60% of the official target, but this is actually a strong result for the short term. The bigger question, however, is whether the amnesty is a key element of a more encompassing strategy to overhaul the system of taxation and tax administration.     

我国发展天文旅游的条件、前景探析及策略思考

天文旅游资源从成因可以分为行星地球天文旅游资源、天体天文旅游资源和天文文化旅游资源三类。天文旅游方兴未艾,我国天文旅游具有很大发展前景。文章对我国开展天文旅游的条件进行了分析,对发展天文旅游的策略和措施进行了梳理。     

城市社会的开放与农民的城市化

城市社会在对农民的开放与封闭之中徘徊。改革开放后城市社会对农民的开放已经使很多农民城市化。城市社会对农民的封闭已由政策性封闭转向经济性封闭。城市社会对农民的封闭增加了农民城市化的成本和社会风险。必须加强城市社会对农民的开放,逐步消除对农民的封闭政策,以推进农民的城市化。     

The causes of Japan's ‘lost decade’: The role of household consumption

In this paper, I analyze the causes of the prolonged slowdown of the Japanese economy in the 1990s and find that the stagnation of investment, especially private fixed investment, was the primary culprit. I then investigate the causes of the stagnation of household consumption during the 1990s and find that the stagnation of household disposable income, the decline in household wealth, and increased uncertainty about the future are among the contributing factors. Finally, I consider whether demand side factors or supply side factors were more important as causes of the prolonged slowdown of the Japanese economy in the 1990s and conclude that the former (especially misguided government policies) were probably more important.     

信息化时代商学院图书馆的建设与发展——中、美四大名校商学院图书馆建设的比较与启示

信息化时代中美商学院图书馆的建设与发展,成为当今时代高等商学教育发展与进步的一个重要环节,对中美四大商学院图书馆的发展状况、差距进行分析比较,对促进我国商学院图书馆事业的改革、建设和发展具有一定的启示作用和参考价值。