开始被使用

In this paper a Nonlinear Variable Dimension Estimator is proposed for tracking maneuvering spacecraft. Two process models were incorporated by the Unscented Kalman Filter to account for the dynamic uncertainties of the target of interest: a nonmaneuvering model based on the two body problem and a maneuvering model taking the forced acceleration as the unknown system input to be estimated.

当飞行器处于无机动的巡航状态时，无色卡尔曼滤波器使用常规的二体问题模型描述其运动规律，而当飞行器被认为开始机动后，滤波器将扩展系统的状态空间，将机动加速度作为状态变量进行估计，从而增加了模型的适应性。

Sixteen years later (corresponding to about one-fifth of Uranus' 84-year period of revolution), the Uranian ring system were seen at an angle that is comparable to the one under which we see Saturn when its ring system is most "open".

突然想起1999年实际是所谓"末日大预言"的审判日，但又恰好是 VLT 工作的开始之日——这种天文学际遇很可能是 VLT 被列项赶在1999年投入使用的一个重要客观因素。

The AHT in the UK began to use Vetgens test and looked at a sample of about 40 British Bedlingtons where some had biopsy results and some they believed they knew the genotype of because they had been test-bred.

英国的AHT开始使用Vetgens测试，而且观察了40个贝灵顿一组的样本，其中一些有过活体检测结果，而且一些被确认为他们知道确切地基因育种类因为他们血线测试过了。

He says artesunate and mefloquine could have a use in places like Eastern eastern Africa where there are high level levels of resistance to several drugs. The Drugs for Neglective Disease Neglected Diseases Initiative began in two thousand three. It was established by the * institute Pasteur Institute and Doctors with Without Borders along with form four publicly supported research organizations.

目前，在非洲，有两种重要的使用青蒿琥酯与其他药物的治疗方法，他说青蒿琥酯与甲氟喹可以用于像东非那样有高抗药作用的地区。2003年被忽略疾病研发药物计划开始，由Pasteur研究所与无国界医生及其他四个公共支持的研究组织成立。

Since I learned silversmithing,'Silver' plays a very important role of making jewelry. It's because of silver's price(cheaper than other precious metal) and ductility.

自从开始学习金工，银这个材质就被大量的使用，除了银与其他贵金属相比起来价格比较经济实惠，也因为银有著非常大的柔软度与延展性，因此相当适合做各式大型与金工技巧学习。

With respect to our country character, begin from 2008, the problem is used to also be fulfilled on the net of intellectual property the government superintends limits.

就我国而言，从2008年开始，知识产权的网上使用问题也被落实到政府监管范围。

RSS is widely used for syndicating weblog content but its corporate use is only starting to be tapped for activities such as corporate messaging.

RSS已经被广泛的用于同步网志内容，但是公司使用仅仅开始于象公司信息这样的活动。

Korea, geographically near China, produced Sino-Korean words by adopting Chinese Characters as its own national characters early before Anno Domini. Sino-Korean words had been used extensively and played an irreplaceable role in Korean even after the King Sejeong created the Korean script at the mid-15th century.

韩国在地理位置上与中国相邻，早在公元前就开始吸收中国的汉字，作为其主要文字。15世纪中叶，世宗大王创制其正的韩国文字之后，汉字词仍然被广泛使用，并且在整个韩国的语言文化生活中占有举足轻重的地位。

Accordingly, open bureau embattle to also develop to security, effectiveness stage by stage, with making edge part double lever ball is mixed the long-range raids that brush an edge is given priority to, occasional sends ball of on the offensive quadrilateral tactical emerge as the times require, it is to begin to use a kind to open way of bureau embattle battle in last few years, already got the self-identity of lover of broad ball catch gradually, be in in last few years in contest of countrywide ball catch, be used by more whole nation's famous team place.

因此，开局布阵也逐步向平安性、有效性发展，以搞边角双杆球和擦边奔袭为主，间或派遣先手球的四角战术应运而生，它是近几年开始使用的一种开局布阵战法，已逐渐得到广大门球喜好者的认同，在近几年的全国门球竞赛中，被较多全国知名的球队所采用。

There is no solvent pollution of the solvent free AKD was. It is able to be used in cap paper of foodstuff. The AKD's production method is consecutive. Liquid AKD wax may solve the skidding of paper. The high speed of reaction with fibre AKD wax is used in the light-weight coated paper.

从1956年到1980年期间，AKD等中性施胶剂仅被用于需要重施胶的特殊纸张中，例如，液体包装纸、少量的需要碱性条件下生产的纸等[1]；由于其具有高不透明度、高白度、使用低成本的沉淀碳酸钙填料的优势，同时，许多高档纸开始从酸性造纸转向碱性造纸，自此，AKD进入了快速发展的时期。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。