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| 1 | An analysis of the wide area differential method of geostationary orbit satellites显示文摘This work aims to obtain a wide area differential method for geostationary orbit (GEO) constellation. A comparison between the dilution of precision (DOP) of four-dimensional (4D) calculation including sa- tellite clock errors and ephemeris errors and that of three-dimensional (3D) calculation only including ephemeris errors with the inverse positioning theory of GPS shows the conclusion that all the 3D PDOPs are greatly reduced. Based on this, a basic idea of correcting satellite clock errors and ephem- eris errors apart is put forward, and moreover, a specific method of separation is proposed. Satellite clock errors are separated in a master station with time synchronization, and all the remaining pseu- do-range errors after the satellite clock errors have been deducted are used to work out ephemeris corrections of all GEO satellites. By a comparative analysis of user positioning accuracy before and after differential, the wide area differential method is verified to be quite valid for GEO constellation. | CAI ChengLin1,2,3?, LI XiaoHui1 & WU HaiTao1 1 National Time Service Center, Chinese Academy of Sciences, Lintong 710600, China 2 Hunan Institute of Humanities, Science and Technology, Loudi 417000, China 3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，2： | 7 |
| 2 | 活性氧化铝除氟研究显示文摘针对目前活性氧化铝饮水除氟中存在的问题,进行了生产性试验研究,通过采用原水投加CO_2气体降低pH值、小颗粒活性氧化铝、大流量短历时的NaOH循环再生法等新技术,提高了活性氧化铝的吸附容量和处理水的能力,克服滤料板结和假疲劳,除氟效果稳定可靠,水质好,再生时间短,用药省,降低了基建投资和运转费用。 | North China Municipal Engineering Design Institute A full-scale plant was set up for studying the existing problems on the fluoride removal from drinking water by activated alumina. Some new methods was adopted,such as the addition of CO2to reduce water pH value,the use of small-sized activated alumina,and the employment of a cyclic regeneration at large flow rate with NaOH as regenerant,which result in the improvement of adsorption capacity of activated alumina and treatment capacity, the elimination of the hardening of filtration materials and false fatigue,stable and reliable effectiveness,good quality in water,short regeneration time,small consumption of regenerant. And then the capital and openational costs were reduced. | 1989 | 中国给水排水1989，5，3： | 5 |
| 3 | Acknowledgments to reviewers of World Journal of Biological Chemistry显示文摘Many reviewers have contributed their expertise and time to the peer review,a critical process to ensure the quality of World Journal of Biological Chemistry.The | Many reviewers have contributed their expertise and time to the peer review,a critical process to ensure the quality of World Journal of Biological Chemistry.The editors | 2011 | World Journal of Biological Chemistry2011，2，9： | 2 |
| 4 | An empirical analysis of electricity consumption in Cyprus显示文摘 | time series prediction using multiple-output support vector regression a decision support system(DSS) for electricity peak-load forecasting Zachariadis T Pashourtidou N | 2007 | Energy Economics2007，29，2： | 1 |
| 5 | Devolution and welfare:the social and legal implications of state inequalities for welfare reform in the United States显示文摘 | WHITAKER TIME | 2001 | Social Justice2001，28，1： | 1 |
| 6 | MIMO radar space- using prolate spheroidal wave functions 显示文摘 | Chen C Y Vaidyanathan time adaptive processing P P | 2008 | IEEE Transaction on Signal Pro- cessing2008，56，2： | 1 |
| 7 | Trial of invasive versus medical therapy in elderly patients with chronic symptomatic coronary-artery disease ( TIME ) : a randomised trial显示文摘 | TIME investigators | 2001 | Lancet2001，358，： | 1 |
| 8 | diffusion,and substitution of successive generations of technological innovations:the IBM mainframe case显示文摘 | Mahajan V Muller E Timing | 1996 | Technological Forecasting and Social Change1996，51，2： | 1 |
| 9 | Astronomical function and date of the Taosi observatory显示文摘The Taosi site in Xiangfen County,Shanxi Province,may be the capital of the King Yao. Archeologists recently discovered a large semi-circular stamped-earth platform, II FJT1,which has a clear and definite pounded-earth central core together with a curved wall perforated by twelve gaps. The platform is said to be an ancient observatory used to determine the seasons by watching the sunrise. Each feature of II FJT1 was precisely measured and the data are reproduced in this paper. An astronomical analysis of slots E2 and E12 was carried out using the azimuths of the slots' centerlines and the vertical angle of the mountain ridge opposite, above which the sun rises. The results show that at present the sun is close to the two slots but does not exactly enter them at summer and winter solstice sunrise. Using 14C analysis archeologists dated the site to about 2100 BC. Because of the secular change in the obliquity of the ecliptic,at that date on the summer solstice the half-risen sun would have appeared inside slot E12 just to the right of the centerline,and on the winter solstice the sun would have been exactly on the centerline of slot E2. This result provides compelling proof that II FJT1 is an ancient observatory. | WU JiaBi1, CHEN MeiDong2 & LIU CiYuan3 1 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2 Institute for the History of Natural Science, Chinese Academy of Sciences, Beijing 100010, China 3 National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，1： | 1 |
| 10 | regulationofp63isoforms by snail and slug transcription factors in hu-mansquamous cell carcinoma显示文摘 | Herfs M HubeReal time P Suarez-Carmona M | 2010 | Am J Pathol2010，176，4： | 1 |
| 11 | Trial of invasive versus medical therapy in elderly Patients with chronic symptomatic coronary artery disease(TIME):arandomized trial显示文摘 | TIME Investigators | 2000 | lancet2000，358，： | 1 |
| 12 | elegans and is regulated by the lin-4 RNA显示文摘 | Moss EG LeeRC Ambros V The cold shock domain protein LIN-28control development timing in C | 1997 | Cell1997，88，5： | 1 |
| 13 | The Semantic Web显示文摘 | Time Berners Lee James Hendler Ora Lassila | 2001 | Scientific American2001，，5： | 1 |
| 14 | String edits and macromolecules: The theory and practice of sequence comparison 显示文摘 | SANKOFF D KRUSKAL J B TIME W | 1983 | Addison Welsey1983，3，： | 1 |
| 15 | D degree显示文摘 | Thomson Richard Charles The influence of venture capital funding on firm performance and time to Initial public offerings Dissertation for Ph | 1993 | University of Colorado1993，，： | 1 |
| 16 | Geophysics 显示文摘 | Landro M Discrimination between pressure and fluid saturation changes from time lapse seismic data | 2001 | 66:836-8442001，66，： | 1 |
| 17 | Underbalanced drilling dynamics: two-phase flow modeling and experiments显示文摘 | LAGE A C FJELDE K K TIME R W | 2000 | IADC/SPE 627432000，，9： | 1 |
| 18 | American Society of Interventional and Therapeutic Neuroradiology 显示文摘 | Intraarterial thrombolysis: ready for the first time? Executive Committee of the ASITN | 2001 | AJNR Am J Neuroradiol2001，22，1： | 1 |
| 19 | Trial of invasive versus medical therapy in elderly patients with chronic symptomatic coronary artery disease ( TIME) : a randomised trial显示文摘 | TIME investigators | 2001 | Lancet2001，358，9286： | 1 |
| 20 | elegans and Is Regulated by the lin-4 RNA显示文摘 | Moss EG Lee RC Ambros V The Cold Shock Domain Protein LIN-28 Controls Developmental Timing in C | 1997 | Cell1997，88，1997： | 1 |
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