对输电线击杆率的探讨

输电线的击杆率直接影响到线路雷击跳闸率计算，击杆率不仅与地形、地势、杆塔的高度、结构有关，还与雷电流的幅值、概率有关。针对《规程》推荐的击杆率，采用电气几何模型的原理，探讨了线路平均击杆率。     

2014年4月网络安全监测数据发布

1木马僵尸监测数据分析 1.1中国境内木马或僵尸程序受控主机分析 2014年4月,中国境内（以下简称境内）211万余个I P地址对应的主机被木马或僵尸程序控制,与上月的199万余个相比增长6.2%。2013年5月至2014年4月,境内被木马或僵尸程序控制的主机IP数量月度统计如图1所示。     

SS4型电力机车计算机仿真模型建立及谐波分析

利用PSCAD仿真软件对韶山Ⅳ型电力机车(SS4)的运动过程建立动态仿真模型,提出了基于傅里叶级数展开方法的谐波电流计算方法。并以AT牵引变电所为算例,带入机车模型进行仿真计算,得出各次谐波电流分量及其谐波含量,并与实测数据进行了比较,结果证明本方法及模型是有效的。     

考虑储能备用的电动汽车负荷连续追踪弃风曲线优化模型

在大力推动高比例可再生能源并网的背景下,风电的强随机波动特征导致的大量弃风问题给电力系统的经济可靠运行带来了挑战,而电动汽车、储能等作为需求侧的灵活性资源参与曲线追踪交易为弃风问题带来了解决方案。首先,分析了电动汽车消纳风电的可行性;然后,对电动汽车聚合负荷消纳风电的交易模式进行了梳理,聚焦连续曲线追踪交易,在充分考虑电动汽车聚合的物理经济约束下建立了混合整数线性规划模型以求解聚合调用方案。由于电动汽车的移动储能能力与追踪效果有限,引入储能系统进行联合优化,采用逐步搜索法在降低聚合成本的同时,得到储能的最优容量与功率配置以及同时优化物理弃风电量与经济成本的聚合方案。算例分析结果表明：考虑储能备用的聚合方法能够提高风电曲线的追踪精度,减小聚合成本,验证了所建模型在连续曲线追踪中的可行性与适用性,可为曲线追踪交易市场的完善与新型电力系统的建设提供借鉴。     

让Windows Media Player欺骗你的耳朵

要享受真正的震撼音场是花钱又麻烦的事,不过如果不是很挑剔的话,可以加上现在的影片播放器内建一些改变声音的特效功能,当然加上这些特效可能多多少少会破坏一点音质,不过如果是观看影片的话,有时候音效的变化可能会比较重要一点(听音乐就另当别论),     

Vista搜索功能更快一步

相信很多朋友都已经用上了Windows Vista(以下简称Vista),不知你是否注意过开始菜单底部的那个"开始搜索"框,通过这个"开始搜索",可以快速完成即时搜索,甚至可以运行程序。不过,假如你希望让Vista的搜索功能更快一步,那么可以重新设置搜索功能。     

Penetration enhancers and ocular bioadhesives: two new avenues for ophthalmic drug delivery

This review is focused on the two avenues of development that promise a major impact on future ocular drug therapeutics: bioadhesives, including hydrogels and other agents like carbopols, polyacrylic acids, chitosan, etc., and penetration enhancers, including different surfactants, calcium chelators, etc. The capacity of some polymers to adhere to the mucin coat covering the conjunctiva and the corneal surface of the eye forms the basis for ocular mucoadhesion. These systems markedly prolong the residence time of a drug in the conjunctival sac, since clearence is now controlled by the much slower rate of mucus turnover rather than the tear turnover rate. But improving the corneal drug retention alone is inadequate in bringing about a significant improvement of drug bioavailability. Another approach consists of transiently increasing the pentration characteristics of the cornea with appropriate substances, known as penetration enhancers or absorption promoters. The main aim of this article is to give an insight into the potential application of mucoadhesives and corneal penetration enhancers for the conception of innovative opthalmic delivery appraoches, to decrease the systemic side effects, and create a more focused effect, which may be achieved with lower doses of the drug. Ophthalmic formulations based on these mucoadhesives and penetration enhancers are simple to manufacture and exhibit an excellent tolerance when administered into the cornea. The use of the former considerably prolongs the corneal contact time and the use of the latter increases the rate and amount of drug transport. The various corneal epithelial barriers along with the major routes of transport of drugs are discussed. The article includes a list of the various substances in use or under investigation for the aforementioned properties, along with their mechanisms of action. A fair appraisal of the subject with regard to these two therapeutic approaches and any expected ill effects has been made.     

Dietetic canned food using ocean fish and plant components

The results of the creating canned ground goods of a new kind are described in this article. The main character references of food value of hake and the canned ground foods based on it. It has been established that the new products of safety. Clinical tests have been showed the efficiency of including these canned goods in the menu of fat patients, also with heavy obesity. Dietetic canned ground foods on the base of oceanic fishes with plant additives.