A new red variable star in the globularcluster M4     

Yao Bao-an  Sheng Chang-jung  Zhang Chun-sheng  Lin Qing 《Chinese Astronomy and Astrophysics》2004,28(4):399-403

G302 = L3107 is a red star located at the lowest end of the red giant branch of the globular cluster M4. According to its location on the C-M diagram, G302 may be a cluster member. No proper motion or radial velocity determinations are available up to date.

We discovered that C302 is a new variable star with a main period of 1.24719 day and a peak to peak amplitude of about 0.3 mag in V. It may have a second period of 2.38249 day with an amplitude of about 0.05 mag. If it is a cluster member, then there will be interesting implications for the the theory of stellar evolution.  相似文献   

EVOLUTION　OF　RAPIDS　OF　CREEK　MOUTH－BAR　AT　GEZHOUBA　RESERVOIR　AND　THE　IMPACTS　ON　NAVIGABLE　CHANNEL　IN　THE　UPPER　REACHES　OF　THE　CHANGJIANG　RIVER     

林承坤  高锡珍 《中国地理科学(英文版)》1996,6(3):223-230

ＥＶＯＬＵＴＩＯＮＯＦＲＡＰＩＤＳＯＦＣＲＥＥＫＭＯＵＴＨ－ＢＡＲＡＴＧＥＺＨＯＵＢＡＲＥＳＥＲＶＯＩＲＡＮＤＴＨＥＩＭＰＡＣＴＳＯＮＮＡＶＩＧＡＢＬＥＣＨＡＮＮＥＬＩＮＴＨＥＵＰＰＥＲＲＥＡＣＨＥＳＯＦＴＨＥＣＨＡＮＧＪＩＡＮＧＲＩＶＥＲ￥ＬｉｎＣ...  相似文献   

Filament activation and magnetic reconnection     

Deng  Yuanyong  Lin  Yong  Schmieder  Brigitte  Engvold  OddbjØrn 《Solar physics》2002,209(1):153-170

Solar Physics - A curved filament in a decaying active region (AR&;nbsp;8329) was observed on 9 September 1998 with a combination of several instruments. The main data base is a 4-hour long time...  相似文献   

VARIATIONAL ITERATION SOLVING METHOD FOR SEA-AIR OSCILLATOR MODEL OF INTERDECADAL CLIMATE FLUCTUATIONS     

MO Jia-qi LIN Yi-hua WANG Hui 《中国地理科学(英文版)》2005,15(3):227-230

1IN T R O D U C T IO NInteractionsbetween the ocean and atmosphere con-tributeto climatefluctuationosver a broad spectrum oftime scales.Studiesof those interactionhsave farfo-cused on El Ni o-SouthernOscillation(ENSO)phe-nomenon thathas a period of3to4yea…  相似文献   

Discussion of the paper 'High- to ultrahigh-pressure (UHP) ductile shear zones in the Sulu UHP metamorphic belt, China: implications for continental subduction and exhumation' by Zhao et al.     

Wei Lin  Michel Faure  Patrick Monié  Nicole Le Breton 《地学学报》2005,17(1):86-88

  相似文献   

一种基于自适应麦克风阵的智能天线实验平台     

全太锋  牟颖  何小海  朱林 《成都信息工程学院学报》2006,21(3):418-422

智能天线是第三代移动通信的关键技术之一,也是当前信号处理和通信领域的研究热点.在对智能天线算法进行理论分析和仿真的基础上,有必要构建一个灵活、通用的实验平台,用以验证各种智能天线算法的有效性和实用性.探讨了一种基于自适应麦克风阵的智能天线实验平台的实现方法,介绍了该系统的原理、结构和各部分的作用.  相似文献   

对日照市农村居民点用地整理模式的思考   总被引：7，自引：0，他引：7       下载免费PDF全文

刘海玲  林彬  孔凡生 《山东国土资源》2007,23(1):34-35

1农村居民点的基本情况日照市现辖东港区、岚山区、莒县、五莲县4区县,2005年全市共有54处乡(镇、街道办事处),90个居委,2909个行政村,农业人口186.31万人,农村居民点用地面积36077.07hm2,人均193.64hm2,超出国家规定的人均150m2的上限标准。在农村居民点用地构成中有宅基地、工业和商业用地、宅旁绿地、街巷道路、公用设施用地和未利用地等,其中面积最大是宅基地,面积最小的是绿地,农村居民点用地中存在一定比例的工业用地和未利用土地,这也是造成农村居民点用地过大的原因之一。2农村居民点用地存在的问题(1)农村居民点用地布局分散、基础…  相似文献   

The space distribution and orbital resonances of asteroids     

Lin Liu  Xin-hao Liao 《Chinese Astronomy and Astrophysics》1989,13(4):408-416

We have made a detailed numerical analysis of the various orbital resonances of the asteroids and examined the variation in the distribution of trajectories near the equilibrium points in the phase plane, and hence arrived at a preliminary explanation of the features (gaps and clusters) in their distribution in space.  相似文献   

SIMPLE MARKOV CHAIN MODEL OF SMOG PROBABILITY IN THE SOUTH COAST AIR BASIN OF CALIFORNIA     

Gong-Yuh Lin 《The Professional geographer》1981,33(2):228-236

The simple Markov chain model approximates sequences of episode days for those air-monitoring stations with sufficient data for analysis. The conditional probability for episode days shows a distinct regional pattern, with highest values over the inland valleys and decreasing values toward the coast.  相似文献   

无力场模型黑子上空的纵向磁场梯度     

林元章  邬飞 《中国天文和天体物理学报》1987,(4)

本文按常α无力场模型计算了1980年10月23日Boulder 2744活动区前导黑子的纵向磁场随高度的变化,并与用CIV 1548谱线观测得到的色球一日冕过渡区的磁场资料相结合,求得CIV 1548发射区的有效高度。这些结果与文献[4]中对同一黑子用势场模型推求的结果有很大差别。从而表明,势场和无力场在某些方面导致的结果是极不相同的。鉴于观测已表明活动区上空存在电流的事实,在活动区磁场的模拟中,特别是在强扭曲活动区磁场的计算中,应当避免采用势场,而尽可能采用无力场模型。  相似文献