基于TCP/IP的网络扫描策略设计与实现

在研究网络扫描技术的基础上,提出了基于TCP/IP的网络扫描策略,集成了多种高效的扫描方式,其中重点给出了基于套接字的半开放式扫描和ICMP网络主机扫描的实现过程。     

网络系统安全漏洞扫描浅析

网络系统安全漏洞扫描是评估和分析信息系统安全性的基础和安全扫描系统的必要组成部分.介绍了漏洞扫描所采用的策略、步骤后,归纳并详细分析了与步骤相对应的几种主要的漏洞扫描技术,其中包括:PING扫描、操作系统探测、如何探测访问控制规则、端口扫描及漏洞检测等.最后给出了关于漏洞扫描的对策和发展趋势.     

近红外线扫描对非泌乳期乳腺炎38例诊断结果分析

本文报告自1992年以来采用近红外线扫描诊断非泌乳期乳腺炎38例,并且详细介绍近红外线扫描对其检查的方法、类型特点、结果判定与近红外线扫描同类型乳癌鉴别要点,及近红外线扫描检查辅以针吸(穿刺)细胞学检查可以提高其诊断率。全组病人经手术后病理证实:近红外线扫描诊断符合率763％;近红外线扫描辅以针吸(穿刺)细胞学检查符合率为97.4％。充分显示近红外线扫描对本病的诊断价值。     

盲生触摸觉表象心理扫描中的距离效应研究

参考Kosslyn和Kerr等人的心理实验,采用心理扫描的研究方法,让20名明眼学生和20名盲生看或触摸二幅不同的图画,然后记录被试扫描表象时的反应时,并要求被试在扫描完成后报告其扫描过程。结果表明,盲生在对触摸觉表象进行扫描时,也表现出了距离效应;盲生触摸觉表象扫描与明眼生视觉表象扫描之间在反应时上不存在显著差异;表象扫描中可能需要表象投射及相应的手部运动。     

副鼻窦低剂量CT扫描技术

目的 探讨副鼻窦CT冠状位扫描时单纯降低mA值对图像质量的影响,及寻找合适的mA扫描值.方法 对来我科进行副鼻窦扫描患者随机使用不同的mAs扫描序列进行检查,对不同mAs扫描图像的质量进行评价,并进行统计学分析.结果 扫描剂量加权指数与mA呈正性相关,而50mAs与常规剂量扫描图象质量差异无统计学意义.结论 单纯降低mA条件下,受检者所受剂量明显减少,虽图像噪声有所增加,但图像能够满足诊断要求.     

谈系统漏洞扫描

对系统漏洞和系统漏洞扫描进行了探讨,主要分析了系统漏洞的分级以及常见的漏洞及其攻击方法,介绍了基于主机的漏洞扫描和基于网络的漏洞扫描的区别,并重点对网络扫描进行了研究。     

自制扫描隧道显微镜探针尖的比较研究

探针对扫描隧道显微镜成像起至关重要的作用。本文分别对电化学腐蚀法自制的钨丝探针和剪切法制得的铂铱探针进行扫描光栅图像比较分析。结果表明,相比铂铱探针,钨丝探针虽然制备繁琐,反应条件不易控制,但是尖锐轴对称形的钨丝探针扫描样品形貌更加细微,用作扫描隧道显微镜探针时扫描成像质量高。该研究为扫描隧道显微镜探针的选用提供了依据。     

扫描0等待

八爪鱼:对于电脑来说这样或那样的原因造成的停电、死机在所难免,每次重新启动计算机时系统会自动对磁盘进行扫描。进行磁盘扫描前,系统会有一段10秒的倒计时时间让你选择是否跳过磁盘扫描。扫描是必须进行     

网阅知识点滴（3）

如何选择一套好的网阅系统（一） 扫描：扫描正在进行的同时,客观题答案就显示在电脑屏幕上了,而不是扫描一组答题卷后,再用程序处理而得出客观题结果,这样才能保证客观题扫描识别的正确性;     

影响激光Z扫描测量精度的因素分析

Z扫描技术具有实验装置简单、操作方便和灵敏度高等优点而被广泛应用于材料的非线性光学特性研究．该文介绍了激光Z扫描技术的基本原理,并针对影响激光Z扫描测量精度的八个因素进行分析,提出相应的提高Z扫描精度的方法．     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.