哈萨克斯坦地震专家来新疆访问

应新疆维吾尔自治区地震局的邀请，哈萨克斯坦共和国地震研究所专家潘林、别洛斯留得采夫、库尔什格娃于2001年3月12日至3月17日来我局进行了工作访问。访问期间双方专家就综合预报方法进行了探讨，研究员朱令人、研究员王海涛、高级研究员别洛斯留得采夫还分别做了《地震复杂性前兆及高维统计预测》、《加卸载响应比理论及其应用》、《地震短期预报》的学术报告。哈方专家还考察了乌鲁木齐基准台、红山地震台和乌什城遥测台。     

A Novel VOF-Type Volume-Tracking Method for Free-Surface Flows Based on Unstructured Triangular Mesh

A novel VOF-type volume-tracking method for two-dimensional free-surface flows based on the unstructured triangular mesh is presented. Owing to the inherent merit of the unstructured triangular mesh in fitting curved boundaries, this method can handle the free-surface problems with complex geometries accurately and directly, without introducing any complicated boundary treatment or artificial diffusion. The method solves the volume transport equation geometrically through the Modified Lagrangian-Eulerian Re-map （MLER） method, which is applied to advective fluid volumes. Moreover, the PLIC method is adopted to give a second-order reconstructed interface approximation. To validate this method, two advection tests were performed for the establishment of the accuracy and convergence rate of the solutions. Numerical results for these complex tests provide convincing evidence for the excellent solution quality and fidelity of the method.     

对“用方格网测磁方位角的精度探讨和评价”一文提出两点意见

测绘通报1960年第二期所刊“对‘用方格纲测磁方位角’的精度探讨和评价”一文,我们认为其中有些不妥之处,特提出两点意见如下：     

致 谢 审 者

一年来，本刊编委及有关专家对编辑部来稿进行了严谨、负责的审稿，使本刊的学术质量得以不断提高．在此，谨向下列审者致以衷心地感谢． 　　(以姓氏笔划为序) 丁志峰　丁国瑜　丁鉴海　刁桂苓　马　瑾　毛桐恩　牛志仁　王　仁　王亚勇 王吉易　王培德　王琳瑛　王文　王　FDA5　王椿镛　王碧泉　车用太　车兆宏 邓起东　冯　锐　冯德益　石耀霖　任振球　关华平　刘百篪　刘启元　刘建华 刘　杰　刘　洋　刘福田　刘蒲雄　刘耀伟　向宏发　孙为国　安镇文　巩守文 朱元清　朱日祥　朱令人　朱传镇　朱岳清　江在森　许力生　许忠淮　许绍燮 李小军　李世愚　李幼铭　李延兴　李均之　李松林　李清河　阮爱国　吴庆鹏 吴建平　宋俊高　张天中　张少泉　张东宁　张国民　张桂清　张　流　张培震 张德齐　杜建国　汪一鹏　陆阳泉　陆远忠　陈英方　陈　勉　陈　　陈晓非 陈培善　陈鑫连　杨建思　周公威　周硕愚　林长佑　林传勇　林邦慧　罗奇峰 罗灼礼　罗奇峰　范立础　范国华　郑治真　郑金涵　郑斯华　金　严　金　星 姚　陈　姚振兴　施行觉　柏美祥　洪汉净　洪时中　胡亚元　胡毓良　赵凤新 赵玉林　赵国泽　郗钦文　闻学泽　凌道盛　夏　禾　徐文耀　徐　平　徐道一 徐锡伟　殷有泉　秦嘉政　聂永安　郭大庆　郭自强　郭增建　钱书清　钱家栋 陶夏新　顾国华　顾浩鼎　顾瑾平　曹新来　梅世蓉　黄立人　黄忠贤　黄福明 龚绍京　傅征祥　傅容珊　景利平　焦明若　琴朝智　蒋　淳　谢礼立　谢新生 韩渭宾　赖锡安　詹志佳　鄢家全　蔡永恩　蔡祖煌　滕吉文　臧绍先　黎凯武 　　魏修成　　　　　　　　　　　　　　　　　　 《地震学报》编辑部     

Three-Dimensional Gravity Model Applied to Underwater Navigation

At present, new integrated navigation, which usesthe location function of reference gravity anomaly map to control the errors of the inertial navigation system (INS), has been developed in marine navigation. It is named the gravity-aided INS. Both the INS and real-time computation of gravity anomalies need a 3-D marine normal gravity model. Conventionally, a reduction method applied in geophysical survey is directiy introduced to observed data processing. This reduction does not separate anomaly from normal gravity in the observed data, so errors cannot be avoided. The 3-D marine normal gravity model was derived from the J2 gravity model, and is suitable for the region whose depth is less than 1000 m.     

精益求精开创未来

<华南地震>从1981年创刊以来,已经历了20年风雨历程.20岁,对一个人来说,正是青春年华,大有作为的开始;20岁,对一个刊物来说,也正是处于成熟期,它的办刊方针更明确,刊登文章的内容更丰富,作者群体的面更广,编委会的组成更具代表性(编委会成员中有港、澳及日本学者),读者群体除了一批固定的老订户外又增加了众多的新朋友.2001年也是<华南地震>编委会的换届之年,第六届编委会在第五届编委会的基础上,作了部分调整,有三分之一的编委继续留任.第六届编委会在编委组成中将专业的广泛性,地域的分布面和年龄结构的合理性作为调整的重点,使编委会更具广泛性、权威性和对新思维的敏感性.