In particular , we plan to investigate the following questions : how do the nature of these threats change over time , how effective are attackers at compromising services , and how well do existing security countermeasures provide a meaningful defense against these threats in practice 特别是，我们计划研究下面的问题：这些威胁的是怎样随着时间变化的，攻击者在危及服务安全的时候的有多高效，现有的安全措施在面临这样的威胁的时候能提供什么样的保护？
I actually know what you have gone through to achieve your much admired status because i , too , have burned that mid - night oil trying to make sense out of those impossible problem sets on structure , materials or whatnot . the difference is that you have made it as engineers today , practicing the honourable trade of building 规划地政局局长曾俊华今日（十一月三十日）表示， loft （多用途空间）已迅速成为很多城市旧工业区重新发展的不可或缺部分，因此政府计划研究将本港旧工业楼宇发展为此类用途的可能性。
The registry established a strategic change plan ( scp ) study team in october 1998 to undertake a comprehensive review of the department s operation and procedures ; and examine and assess the feasibility and impact of document imaging and the three key drivers 公司注册处在一九九八年十月成立策略性改革计划研究组，全面检讨部门的运作和工作程序，并研究和评估文件影像处理与三个主要推动改革方法（即电子存档、电子处理和电子查阅资料）的可行性以及对现有系统的影响。
Zhang lixia ( water conservancy engineering ) supervised by professor shi kebin this paper mainly discussed a method for multi - goal network ' s optimization . since the network plan was brought forward , the criterion for evaluating network was time cost resource all along . in this paper , through massive study on achievements the predecessors had done the author posed a new criterion : quality , and set up the network ' s quality model ; simultaneously , the author established the network ' s multi - goal model by synthesizing the existing optimum models , also found the finite not bad solution of the model ; because the four goals was in contradiction with each other , using the multi - goal decision theory can optimize the network project scientifically and objectively 本文在对前人关于网络计划研究结论的总结分析的基础上，探讨了评价网络计划优劣的各准则，提出一种新的评判准则：工程质量，并建立了网络计划的工程质量模型；针对目前网络计划多是单目标的优化，综合网络计划就各目标优化方法的研究理论，建立了网络计划的多目标模型，并将工程质量模型融入其中，根据网络计划的特点，解出该模型的有限个非劣解；由于各优化目标之间的矛盾性、不可公度性，用多目标决策理论的方法，科学而客观地对网络计划进行了多目标优化，从而避免了人为决策的盲目性、主观性。
