英语翻译The need for dynamic view management was forcefully made by Kotidis et al.in their DynaMat system[14].As they observe,“This static selection of views[...]contradicts the dynamic nature of decision support analysis.”There are a num-ber

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英语翻译The need for dynamic view management was forcefully made by Kotidis et al.in their DynaMat system[14].As they observe,“This static selection of views[...]contradicts the dynamic nature of decision support analysis.”There are a num-ber
英语翻译
The need for dynamic view management was forcefully made by Kotidis et al.
in their DynaMat system[14].As they observe,“This static selection of views[...]
contradicts the dynamic nature of decision support analysis.”There are a num-
ber of ways to approach the dynamic view selection problem,which we review in
Section 2.2.In this paper we explore an alternative approach to Dynamic View
Selection.We consider an OLAP system with two phases of operation:Startup
and Online.In the Startup Phase an initial set of views must be selected based
on some estimated query probabilities.This is the classical(static)view selection
problem.In the Online Phase an“in use”OLAP system is considered,for which
a set of views M has already been selected and materialized.Since over time
the relative importance of each type of aggregate query may change due to the
changing demands of its users,the system may elect to select a new set of views,
M,which better serves the incoming queries.However,view materialization is
computationally expensive and the time window in which new views can be ma-
terialized may prohibit selection of an entirely new view set.Thus the problem
becomes selecting a new view set M by discarding some views from M,and
adding new ones to be materialized.We refer to the problem of incrementally
updating a view set as the Online View Selection Problem(see Section 2).We be-
lieve that the online view selection problem is an important addition to the static
variant,as OLAP systems in practice are restarted from scratch only infrequently
and must be able to tune their performance to changing conditions on-the-fly.
Our approach to online view selection is to adapt methods that have proven to
be ective for the static variant.In this paper we develop online adaptations of
the greedy heuristic,BPUS,introduced by Harinarayan et al.[1]and three ran-
domized techniques(iterative improvement,simulated annealing and two-phase
optimization)initially proposed for static view selection by Kalnis et al.[3](see
Sections 3 and 4).Our challenge is two-fold.For the static phase,the randomized
methods must be adapted so as to take into account maintenance cost in addi-
tion to the space constraint and for the online phase all of the methods must be
adapted to take into account the existing pool of previously materialized views.

英语翻译The need for dynamic view management was forcefully made by Kotidis et al.in their DynaMat system[14].As they observe,“This static selection of views[...]contradicts the dynamic nature of decision support analysis.”There are a num-ber
需要动态视图管理是有力地发了言kotidis等人.
在他们dynamat制度[ 14 ] ,因为他们的观察, "这静态的选择意见[...]
违背了动态性的决策支持分析" ,也确有序号-
误码率的方式对待动态视图选择问题,这是我们检讨
第2.2.in本文探索一种替代办法,以动态的观点
selection.we考虑OLAP系统与两阶段的操作:启动
和online.in启动阶段,一套初步的意见,必须选择基于
对一些估计查询probabilities.this是古典(静态)视图选择
problem.in线上的一个阶段" ,在使用" OLAP系统被认为是,为这
一套看法米已被选为materialized.since随着时间的推移
相对重要性每类聚集查询可能会改变,由于该
转变的需求,其用户时,系统可将选择一个新的一套看法,
男,更好地服务于来袭queries.however ,观点是物化
运算昂贵和时间窗,其中一些新的看法,可以马
terialized可能禁止选择一种全新的观点set.thus问题
成为选择了一条新的看法一套米乘抛弃一些看法,从米,
加入新的要予以materialized.we提及的问题,逐步
更新期定为网上视图选择问题(见第2条) ,我们得到-
lieve这家线上视图选择问题,是一项重要的,除了静态
变,因为OLAP系统,在实践中是重新开始,从无到有,只有偶尔
而且必须能够调整自己的表现不断变化的情况,对有关的禁飞区.
我们的做法,以在线视图选择,是适应方法已经证明
电子商务?选择性为静态variant.in本文我们发展网上改编
贪婪启发式, bpus介绍所里那瑞安等[ 1 ]和三个然
domized技术(迭代改善,模拟退火法,并分两阶段
优化)最初提出的静态视图选择由kalnis等[ 3 ] (见
第3和第4段) ,我们的挑战是两fold.for静态阶段,随机
方法,必须适应等,以顾及维修费用添加剂-
原因,空间的限制,并为网上阶段,所有的方法必须
改编,以顾及现有一批以前物化视图.

需要动态视图管理是有力地发了言kotidis等人。
在他们dynamat制度[ 14 ] ,因为他们的观察, "这静态的选择意见[...]
违背了动态性的决策支持分析" ,也确有序号-
误码率的方式对待动态视图选择问题,这是我们检讨
第2.2.in本文探索一种替代办法,以动态的观点
selection.we考虑OLAP系统与两阶段的操作:启动
...

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需要动态视图管理是有力地发了言kotidis等人。
在他们dynamat制度[ 14 ] ,因为他们的观察, "这静态的选择意见[...]
违背了动态性的决策支持分析" ,也确有序号-
误码率的方式对待动态视图选择问题,这是我们检讨
第2.2.in本文探索一种替代办法,以动态的观点
selection.we考虑OLAP系统与两阶段的操作:启动
和online.in启动阶段,一套初步的意见,必须选择基于
对一些估计查询probabilities.this是古典(静态)视图选择
problem.in线上的一个阶段" ,在使用" OLAP系统被认为是,为这
一套看法米已被选为materialized.since随着时间的推移
相对重要性每类聚集查询可能会改变,由于该
转变的需求,其用户时,系统可将选择一个新的一套看法,
男,更好地服务于来袭queries.however ,观点是物化
运算昂贵和时间窗,其中一些新的看法,可以马
terialized可能禁止选择一种全新的观点set.thus问题
成为选择了一条新的看法一套米乘抛弃一些看法,从米,
加入新的要予以materialized.we提及的问题,逐步
更新期定为网上视图选择问题(见第2条) ,我们得到-
lieve这家线上视图选择问题,是一项重要的,除了静态
变,因为OLAP系统,在实践中是重新开始,从无到有,只有偶尔
而且必须能够调整自己的表现不断变化的情况,对有关的禁飞区。
我们的做法,以在线视图选择,是适应方法已经证明
电子商务?选择性为静态variant.in本文我们发展网上改编
贪婪启发式, bpus介绍所里那瑞安等[ 1 ]和三个然
domized技术(迭代改善,模拟退火法,并分两阶段
优化)最初提出的静态视图选择由kalnis等[ 3 ] (见
第3和第4段) ,我们的挑战是两fold.for静态阶段,随机
方法,必须适应等,以顾及维修费用添加剂-
原因,空间的限制,并为网上阶段,所有的方法必须
改编,以顾及现有一批以前物化视图。

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需要动态的视野管理是被Kotidis强有力地在他们的DynaMat系统中等等制做14.As他们观察“This静止的选择
视野和决定技术支持analysis.”的动态的本质相矛盾有一处理我们复习的在部分2.2.In中动态的视野选择问题的方式的
num- ber这纸我们探查一个可用作替换的对动态的视野选择的处理方
法我们认为一随着开始使operation:Startup和Onl...

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需要动态的视野管理是被Kotidis强有力地在他们的DynaMat系统中等等制做14.As他们观察“This静止的选择
视野和决定技术支持analysis.”的动态的本质相矛盾有一处理我们复习的在部分2.2.In中动态的视野选择问题的方式的
num- ber这纸我们探查一个可用作替换的对动态的视野选择的处理方
法我们认为一随着开始使operation:Startup和Online.In的两阶段定相的一开头的套视野必
须是的OLAP系统选择基于一些的是估计问题probabilities.This是经典静止视野选择问题在联机阶段中an“in use”OLAP系统被为考虑一套M已经已经是的视野选择哪一个和在的时
间中时间,每一类型的聚集的问题的相对重要性可以改变由于改变的materialized.Since它的用户的
要求系统可以选择选择一新的套视野,更好些服务进来的queries.However,视野实现的M计算地是昂贵和在其中新
视野能是妈terialized的时间窗户可以禁止选择一完全新视野set.Thus问题变成通过从M丢弃一些视野选择一新视野装置M,和补充说是materialized.We新那些把选择问题((明白第2)段交给
增加地更新一是联机视野设定视野的问题处理.我们是亲爱的,其当实际上OLAP系统被重新开始时,联机视野选择问题从
是一重要的对静止变体的增加的仅仅很少发生地抓和一定是能把他们的
表现调谐到在飞行中改变状况.我们对联机视野选择的处理方法是要使已经被证明是e?ective的方法适应静止variant.In这我们
发展的纸联机的改编的BPUS是的贪婪启发经过Harinarayan提出等等1和三ran- domized技术重复的改进模仿能与互补的核酸结合和二相的最优化开始时被建议静电视野选择偏于Kalnis等等3注意到部分
3和4.Our提出挑战是二fold.For静电分阶段前进作任意排列方法必须去被改造那样同样向发生作用变为记述
维修维修在addi- tion中空间约束的费用和为联机阶段全部的方法一定是改造考虑到从前使视野具体化的现存的
水池.

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drive the need for technology 英语翻译原句:The following information corresponds to the details you may need for your actions. 英语翻译we need rainforests for many reasons 英语翻译Do you need ____ for ___. we need help for the school trip We need some hamburgers for the picnic. 英语提问:The need for speed 英语翻译I deem it necessary to introduce myself in detail for you and the need for your assistance to claim and invest my inheritance for me. 英语翻译Force is the law in peace,and sword in war and has no need for reason. 英语翻译Users of information within a firm can specify the types of information they need for their decisions. 英语翻译Person accompanies my block of wood need ,you go to look for the bar needing,.准确的意思 英语翻译when you zsend me the iten?i need for make a gift of my wife,have a good day 英语翻译I understand that I need to prove myself for the team to reply on me incritical game situations 英语翻译Own 4 per cent in equities for each year until you need the money as defined by your investment period above and own bonds for the rest. 英语翻译电影中的对话A:I'll let you hang on to my car for the weekend.But I need it back for MondayB:Feed the meter 英语翻译Dream of precipitation needed in the search for a dedicated dream will not equal to the need for perseverance in efforts sedimentation expect will not empty 英语翻译European UnionIn a 2008 council on disaster strategy,the European Union stressed a balanced approach to disaster preparation,vowing to cover all aspects.It stresses the need for solidarity between its member states and the need for cohesi 英语翻译Thank you for your interest in Western Christian School.The links above provide all the forms you will need to complete an application for admission.Specific instructions for these forms and for other aspects of the admission process are