海湾战争的特点和启示

本文阐述海湾战争的特点和启示,着重分析了现代空袭模式和防空面临的问题。     

不安抗辩权制度评析

不安抗辩权制度是我国新合同法确立的一项重要法律制度，它的设立是我国立法的一大进步，其对合同的正确履行和社会经济生活、市场交换秩序都有重要的意义，但在实践中不安抗辩权制度仍然存在一定的缺陷，对此本文提出探讨性的意见及对策。     

You are what you eat: native versus exotic Crotalaria species (Fabaceae) as host plants of the Ornate Bella Moth,Utetheisa ornatrix (Lepidoptera: Erebidae: Arctiinae)

Crotalaria plants and Utetheisa ornatrix are closely linked to each other: the larvae destroy the seeds, while the moth depends on hostplants for alkaloids. To better understand the ongoing co-evolution, the present study examines how native hostplants compare to exotic ones. Leaf-feeding on Crotalaria pumila, C. rotundifolia, and C. incana, native to the moth’s range, led to faster larval development than on the exotic C. lanceolata, C. spectabilis, and C. pallida. Seed-feeding on all species of Crotalaria led to accelerated larval development and a resultant larger adult moth, and correlates with a higher nitrogen content in the plant tissues. These results add a novel dimension to the previous studies of reproductive biology of this model organism. In controlled settings, mature larvae showed preference for leaves of C. spectabilis over those of other species, perhaps due to the higher alkaloid content. Differences in morphology and phenology of Crotalaria determine the ecology of U. ornatrix populations in Florida. The introduction of novel hostplants, on which U. ornatrix can have a significant negative effect and which are of concern to humans as invasive toxic weeds, has greatly expanded the niche occupied by this moth. Possible co-evolution of Utetheisa sensu lato and plant defences in the genus Crotalaria is discussed.     

关于高等院校开展心理防范教育的思考

高校对安全教育的忽视造成学生安全意识薄弱，防范技能缺乏，这已成为校园安全事故的主要原因之一。通过开展心理防范教育，培养学生的安全意识和防范技能，调动学生的安全需求，引导学生积极参与安全实践活动，可以在校园内形成一道坚固的安全心理防线，最终构建“人防、物防、技防”和“心防”相结合的整体防控网络．创建平安和谐校园。     

非法探取密码的原理及其防范

分析了在应用软件中使用Edit控件非法盗取密码的基本原理,给出了相应的技术防范措施．     

Threshold Subliminal Channel Based on Designated Verifier Signature

The subliminal channel is used to send a secret message to an authorized receiver; the message cannot he discovered by any unauthorized receivers. Designated verifier signature （DVS） provide authentication of a message, we design a DVS scheme with message recovery mechanism and use it as a subliminal channel. In order to share a message among n users securely and allows t or more users can reconstruct the secret in dynamic groups, we combine both subliminal channel and （t, n） threshold cryptography. Then we proposed a threshold subliminal channel which can convey a subliminal message to a group of users based on message-recovery designated verifier signatures. Reconstructing the subliminal message relies on the cooperation of t or more users in the group and they can verify the validity of the subliminal message. Security and performance analysis show that the proposed scheme is secure and efficient.     

如何使篮球防守由被动转化为主动

采用资料法、观摩统计法及对比分析法对蓝球比赛中攻与防的关系重新加以认识和分析，研究表明：加强防守时对进攻意图的预先判断能力和合理位置的选择能力，以及加强对比赛对手投篮得分点的分析和对篮球理论，规则的研究，有利于防守从被动向主动转变，有利于提高整体的防守水平。     

论篮球的攻击性防守

对篮球防守的攻击性问题进行了分析、研究 ,提出了该战术配合的重要性及训练方法 ,目的在于不断提高防守的技、战术水平     

具集群防御特性的Predator-prey系统的Hopf分支

本文详细讨论了一类具集群防御特性的Predator-prey系统的奇点的稳定性质及其Hopf分支,并对一个著名的数学生态学悖论进行了讨论。文中结果对[2,4]的结论提出了质疑。     

浅谈篮球运动个人防守的控制范围

现代篮球运动竞争激烈,对抗性强性.提高运动员的防守能力,扩大其防守的控制范围,需要在防守的脚步动作、正确的选位、适时的干扰、伸缩及防守的基本姿势等方面,加强对运动员的训练与培养.