Three points are claimed here as the pre - requisite : first , a balanced and objective evaluation must be done on the current phase of entry - admittance for the industry regarded as " monopoly " ; second , a truthful specification of the industry on techno - economic features in real terms must be made ; and third , the limit that is allowed to open must be set 一是对各垄断行业目前的开放准入情况有一个客观的评价；二是对这些行业的技术经济情况做具体分析；三是在目前情况下，每个行业的开放度。
In order to boost the enthusiasm of the senior management for better working performance , a practical method of assessment is required to accommodate with the need of oil production industry . being very familiar with the mckinsey assessment system due to many years of involvement in the management of human resource gives me a chance to construct this essay 中国石油在目前情况下，急需一套与油田企业相适应、行之有效的业绩考评体系，以提高管理人员的工作绩效和积极性，本人从事的工作即为人事管理专业，对这套考评体系及应用问题较为熟悉，因此选择了这个课题。
The far - distance targets can be detected with the aid of the satellite image and the ample respond time of the defensive system can be provided ; the cryptic cruise missile and anti - radiation cruise missile can be effectively detected and tracked recur to the infrared image . radar is widely used in the cruise missile defensive system . the radar in the sky can detect the further flying cruise missile , ground based radar and coastal defense radar can track and help weapons system aim at the oncoming force cruise missile 在目前情况下，卫星图像、红外图像以及雷达成像在探测、跟踪、识别、打击巡航导弹目标方面具有相当大的优势，借助于卫星图像可以在远距离发现目标，能够为防御系统提供比较充足的响应时间；借助于红外图像可以有效对付隐身巡航导弹和反辐射巡航导弹；雷达是在巡航导弹防御系统中使用最多的设备，空基雷达能够探测离防区比较远的巡航导弹，陆基雷达和海基雷达能够跟踪巡航导弹，并可协助武器系统瞄准来袭巡航导弹，尤其是雷达阵在巡航导弹防御中更是可以发挥重要作用。
It use a psc to replace the switch , and implement the csma / cd in the network interface card ( nic ) . when the throughput grows and transfer speed is raised , csma / cd will lower the network ' s performance , but think about such truths below , the half - duplex gigabit optic ethernet will have some market space . first , there still exist large amount of small - size local network nowadays ; but they require high transmit speed , such as studio , lab etc , especially multimedia , graph and image processing , virtual reality and advertising 但是，在目前情况下，出于以下几个方面的考虑，使用csma cd方式的半双工千兆位网络也有它的发展空间：第一、在目前的情况下，有大量的小型局域网存在；但是又要求高的传输速率，如工作室、实验室等工作组级的网络，尤其是现在十分常见的多媒体应用、图形图像处理、虚拟现实与广告渲染等方面。
