Photometry of the contact binary system V471 Cas

UBV photoelectric observations of the W UMa-type binary V471 Cas were made from September to November 1984. Its colour indices were found to be(B-V)=0 _. ^m 771±0 _. ^m 02 and(U-B)=0 _. ^m 196±0 _. ^m 02. TheU, B, andV light curves of V471 Cas show some photometric fluctuations. We found that its orbital period is not 0.335998 days which was given by GCVS (1986), but 0.405356 days.Photometric orbital elements of V471 Cas were found using the Wilson-Devinney method. V471 Cas is a contact system, in which the overcontact factor is 0.19, its mass ratio of two components is 0.5947, and orbital minclination is in 83.29 degrees.     

强磁场下中子星外壳的组分和状态方程

本文计算和讨论了强磁场下由冷的催化物质组成的中子星外壳的组份和状态方程。文中考虑了晶格能和强磁场下均匀电子气体的交换能的贡献.得出结论:(1)强磁场使低密度区的状态方程变软;(2)强磁场对高密度区的状态方程几乎没有影响;(3)核质量公式对外壳的组份影响较明显.     

我国流动SLR首次取得观测成果

介绍了流动SLR系统TROS建成后在北京，乌鲁木齐，拉萨3个站的观测情况。这是流动卫星光测距系统在我国首次正式运行，开创了SLR流动观测的先例，实现了我国SLR领域多年来的愿望。对乌鲁木齐和世界屋脊城市拉萨观测的实现有其重要意义，引起国内外广泛关注。对TROS的建站和观测等问题进行了讨论，给出了观测结果。     

色球活动双星HR1099Hα发射线的高分辨率分光观测和分析

本文给出ＨＲ１０９９（Ｖ７１１Ｔａｕ）的高色散、高分辨率的分光观测结果。从观测结果分析，该双星系统的两子星均有剧烈的色球活动，强的Ｈα发射主峰主要来自活动性强的冷子星，谱线轮廓形状的大幅度变化取决于色球发射物质的运动和恒星内部的物理变化。     

Formation and structure of neutrino astronomical objects

Neutrinos with non-zero mass could gather to form a new kind of astronomical bodies: the Neutrino Astronomical Objects (NAO). We have investigated the mechanism of their formation and the relation of this formation to that of the galaxies, ascertained their e, p, He⁴ content, whose presence should produce a series of observable effects. NAOs are a peculiar kind of heavenly bodies with many new properties. They have a linear size of the order of 100 pc, a total neutrino content of the order of 10¹⁴M and an e, p, He⁴ content of the order of 10⁹M.     

Interannual, decadal and century scale climatic changes revealed by stalagmite records

The stalagmite chronological table is established based on the definition of annual character of microlayers of a stalagmite by comparing the laminated rhythm to natural cyclic processes. Climatic anomalies lasting over ten years and rapid climatic changes such as abrupt changes of mean value, of variability, of trend and of cycles are discovered from the stalagmite chronological table. Stalagmites which record interannual to century scale climatic changes are excellent This work is a part of PANASH/PEP-II Project, and supported by the National Natural Science Foundation of China (Grant Nos.49672134, 49894170), Chinese Academy of Sciences (Grant No.KZ951-A1-402-06-02), and State Science & Technology Commission of China.     

Grey characteristics of microbanding of stalagmite in Shihua Cave, Beijing and its climatic signification(I)

Grey microstructure of microbanding in thin sections of stalagmite T9501 from Shihua Cave, Beijing was studied. The types of grey and the morphologic features of organic material were classified. The signification of microbanding and annual layer was discussed. The standard distinguishing the false annual layer and the multi-year layer is set up, which provides the theoretic fundaments for paleoclimatic study. Project supported by the National Natural Science Foundation of China (Grant No. 49672134).     

Identification of the governing parameters related to rock indentation depth by using similarity analysis

This paper focuses on the indentation depth in rocks caused by a hemispherical indenter. The problem is approached by a combination of similarity methods with an artificial neural network. The similarity methods offer a profound understanding of the physical problem and help to identify the most important governing parameters or factors that reflect the essence of the rock indentation events, thus simplifying the target problem. The artificial neural network provides an advanced computing model, which allows more factors to be involved. The predictions obtained using this combined approach are in better agreement with the experimental results than predictions using other methods.     

X射线荧光光谱法测定钒的原子价平均值

用Ｘ射线荧光光谱法测定了一系列钒的氧化物混合物中Ｖ的Ｋβ谱线的精细结构,研究了钒的氧化物中Ｋβ谱峰参数随混合物平均原子价变化的规律,并利用所作的定标曲线对一些实际样品,如钒渣、磁铁矿中钒的平均原子价进行了定量测定。     

确定南澜沧江缝合带的火山岩地球化学证据

本文着重根据火山岩的主量元素、稀土元素和微量元素特征厘定了我国西南“三江”地区昌宁－孟连带Ｃ１—Ｐ２火山岩和南澜沧江带Ｐ—Ｔ３火山岩的构造－岩浆类型。昌宁－孟连火山岩带为洋脊／准洋脊型－洋岛型玄武岩、蛇绿混杂岩带,代表澜沧江洋或古特提斯的残迹;南澜沧江火山岩带是一个陆缘火山弧带,是澜沧江洋盆向东俯冲消减、碰撞以及陆内俯冲过程的产物。两带火山岩是成对分布的古特提斯缝合带的产物。