基于数字属性和符号属性混合数据的网络异常入侵检测方法

1IntroductionIntrusion detection systems(IDS)can be catego-rizedinto two types bytheir detection algorithms:mis-use detection and anomaly detection.Misuse detectiondefines known attack signatures(using expert know-ledge),and tries to find the ones that ma…     

烟草感染赤星病后几种酶的动态及其作用

对11个烤烟品种接种赤星病病原菌后,定期测定叶片的过氧化物酶(POD)同工酶、多酚氧化酶(PPO)、硝酸还原酶(NR)和抗坏血酸氧化酶活性,观察其变化规律．结果表明,相对抗赤星病强的品种,PPO活性上升;POD同工酶活性变幅大而快,接种初期活性稍有下降,然后增强,其中以阴极端2,4同工酶带增加较快,180 h由弱酶带变为强带;NR活性变化不大;抗坏血酸氧化酶活性提高．相反,抗赤星病弱的品种,PPO活性下降;POD同工酶变化不大,呈下降趋势;NR活性变幅大;抗坏血酸氧化酶在接种初期活性下降,84 h后回升．通过对不同品种的烟株接种赤星病菌后几种酶活性的测定,探察到一些抗病机理,也为进一步寻找筛选抗烟草赤星病的生化指标提供了参考．     

Hong Kong University and Polytechnic Grants Committee

The political uncertainties surrounding Hong Kong's future as a British Crown Colony have not inhibited either the Hong Kong Government or its particular version of a University Grants Committee (UGC) system from devising and planning a continuing expansion of higher education at a time when most other countries are levelling off or contracting their own.This article deals with the many unique features of the Hong Kong situation of which perhaps the most important is the nature of the Hong Kong Government - traditionally colonial and potentially authoritarian, not elected yet highly sensitive to Chinese opinion both internally and externally, and highly efficient in most of its management activities in spite of a strongly laisser faire tradition.The Hong Kong UGC system is charged with much wider planning functions throughout higher education than elsewhere and is responsible for the polytechnic as well as the two universities - hence its trans-binary designation as the University and Polytechnic Grants Committee. While this has helped its overall planning and academic guidance roles, it has involved it in severe difficulties in relation to its basic financial role which requires it to develop methodologies of financial assessment of Polytechnic costs for which no overseas models exist. Its academic membership is still entirely from overseas, with inevitable repercussions on its ability to arrange adequate collective discussion and its reliance on its local secretariat who act as the Government's de facto Department of Higher Education.     

"双师型"中职师资结构模式及队伍建设

中等职业教育迫切需要建立"双师型"师资队伍,要以任职资格而非职称为标准,来界定"双师型"中职师资资格,并将此作为新教师的培养目标、老教师的发展方向和整个师资队伍建设的结构框架.中职师资由三类教师构成:编制内专职教师、从社会各界聘请的兼职教师和在实习中企业指派的实习师傅,以此结构为基础,提高师资整体素质.     

若干鳞翅目昆虫性信息素——Z/E-9-烯脂肪醇醋酸酯的合成

本文提出了合成若干鳞翅目昆虫性信息素—Z/E-9-烯脂肪醇醋酸酯的新方法．即从易得的天然不饱和脂肪酸—10-十一碳烯酸出发,经臭氧化硼氢化钠还原合成相应的10-羟基癸酸,随后经乙酰化得10-乙酰氧基癸酸,再经溴代脱羧反应合成了关键中间体9-乙酰氧基溴代壬烷,最后经维悌希反应合成了目标物．其中,Z/E-9-烯十二碳醇醋酸脂为甘蔗黄螟和枣粘虫等昆虫的性信息素;Z/E-9-烯十四碳醇醋酸酯为茶小卷叶蛾和桔卷叶蛾等昆虫的性信息素;Z/E-9-烯十六碳醇醋酸酯为稻螟蛉的性信息素;Z/E-9-烯十三碳醇醋酸酯和Z/E-9-烯十五碳醇醋酸酯为类似物．     

嫁接与转换的艺术

本文主要是以切身的设计实践为论述基础，探讨这种嫁接活动应遵循的一些原则，力求把民族性与国际性、“土特产”与“洋包装”、少数民族文化与中原汉民族文化有机地结合，尝试以较大范围的区域特色代替某种单一的地方特色。     

文字表述题在物理教学中的应用

高中物理课程标准在课程目标上注重提高全体学生的科学素养;在课程实施上注重自主学习,提倡教学方式多样化;在课程评价上强调更新观念,促进学生发展。文字表述题在以往的物理教学中常被弱化、忽视,在新课程背景下的物理教学中应得到加强、重视。因为它能反映学生对所学内容的理解,所学内容与日常生活的联系,反映学生观察生活的能力,物理语言的表述能力等等多方面素质。让教师及时了解学生状况,调整教学方式,更好地促进学生发展。例人教版物理必修(1)31页问题与练习2.有没有符合下列说法的实例?若有,请举例。A.物体运动的加速等于0,而速度不…     

A framework of region-based dynamic image fusion

INTRODUCTION Image fusion is a sub-area of more general topics of Information Fusion and Data Fusion and deals with static images and dynamic images (image sequences or video data) (Maitre and Bloch, 1997). By com-bining the information from a range of image data obtained by different sensors or the same sensor with different imaging schemes, the composite image al-ways presents the complementary information of different input images at the same time and provides us the integrated descr…     

资本-帝国主义的侵略究竟给中国带来了什么

如何看待资本—帝国主义对近代中国的侵略,是“中国近现代史纲要”这门课程的一个重要问题。对马克思关于英国在印度的殖民统治“充当了历史的不自觉的工具”和殖民主义具有“双重使命”的提法,不应从文字表面进行理解,而应从殖民者的主观动机与客观效果关系的角度、从道德判断角度、从生产力与生产关系的角度进行辩证的、历史的分析。此外,还应从军事、政治、经济、文化等方面具体分析资本—帝国主义侵略中国的方式和特点。     

幼儿教师的组织承诺与工作倦怠关系研究

一、引言 "工作倦怠"是美国的费登伯格(Freudenberger)于1974年提出的,一般认为它是由职业压力引起的以身心极度疲惫为标志的综合反应.工作倦怠常常发生于从事助人职业的个体身上,它的主要特点是对服务对象的冷漠和不负责任;情绪和身体的衰竭感以及各种各样的身心症状,如疲劳、易激怒、焦虑和抑郁等.