Örnek başına her başarısız öznitelik hakkında bir uyarı verilir. Bir dizi doğrulamada başarısız olan bir öznitelik içerdiğinde veya tek bir öznitelikle ilgili birden çok sorun olduğunda, yalnızca ilk başarısız öznitelik neden...
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The reactions of pentamethylantimony with thiols in the ratio 1:2 do not yield compounds of the type (CH3)3Sb(SR)2, but their decomposition products (CH3)3Sb and RSSR. However, via the reaction of (CH3)3SbCl2 with RSH in the presence of an auxiliary base at low temperature the ...
1. 统一建模语言(The Unified Modeling Language,UML) 统一建模语言(Unified Modeling Language——UML)是一种面向对象的建模语言,它可以实现大型复杂系统各种成分描述的可视化、说明并构造系统模型,以及建立各种所需的文档,是一种定义良好、易于表达、功能强大且普遍适用的建模语言。 是一组13种不同的图形类型,他们可以...
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That's why their detection seems to be a big deal for security systems. However, till now, security systems do not include dedicated processes for covert channel detection. In this paper, we first propose mechanisms to detect common covert channels. Then, within a whole security system, we ...
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泛化关系是将特化的用例和一般的用例连接起来,即子用例继承与父用例。 在uml中用例泛化用一个空心三角箭头从子用例指向父用例。强调的是复用关系。如下:登录是一个一般用例,用户名和密码登录 以及手机号登录是特殊用例。 包含关系(Include) 一个用例(基用例)可以包含其他用例具有的行为,强调整体和部分的关系,这uml中...
奥运会乒乓球男子团体金牌赛,中国男团大战瑞典男团。第一次双打的比赛,王楚钦马龙3-2艰难击败对手,遭遇开赛以来最困难一战。过程很艰险,好在结果是好的。第二场单打,樊振东再战莫雷加德。单打击败你夺冠,团队也没有问题。 樊振东开局慢热,跟着对手的节奏走,1-3落后。随后樊振东发起反扑,相持球压制,6-5反超。然后双方...
Synthesen mit Übergangsmetallen: Organotransition Metal Chemistry: Applications to Organic Synthesis. Bd. 2. Von Stephen G. Davies. Pergamon Press, Oxford – New York – Toronto – Sydney – Paris – Frankfurt 1982. XV, 411 S., Flexicover, $ 27,–; Hardcover $ 85,– ...