Changes of taxonomical composition of Late Jurassic- Early Cretaceous palynofioras of Bureya Basin, Russia

The changes of taxonomical composition of the Late Jurassic- Early Cretaceous palynofloras are revealed, in the upper stream of Bureya River in Bureya Basin. The palynofloras are dominated as follows： the Berriasian one by ferns （Cyatheaceae, Dicksoniaceae, Osmundaceae）, Classopollis and bisaccate pollen; the Valanginiar-Hauterivian one by ferns （Cyatheaceae, Dicksoniaceae）, Ginkgocycadophytus and bisaccate pollen; the Barremian one by ferns （Cyatheaceae, Dicksoniaceae）; the Aptian one by ferns （Cyatheaceae, Dicksoniaceae, Gleicheniaceae） and Ginkgocycadophytus; and the Albian one by ferns （Schizaeaceae） and bisaccate pollen. In the Albian the floral diversity raises with the angiosperms appearing.     

Division of high resolution sequence stratigraphy units with wavelet transform of logs in Dagang Oilfield

Division of high resolution sequence stratigraphy units based on wavelet transform of logging data is found to be good at identifying subtle cycles of geological process in Kongnan area of Dagang Oilfield. The anal- ysis of multi-scales gyre of formation with 1-D continuous Dmey wavelet transform of log curve （GR） and I-D discrete Daubechies wavelet transform of log curve （Rt） all make the division of sequence interfaces more objec- tive and precise, which avoids the artificial influence with core analysis and the uncertainty with seismic data and core analysis.     

Experimental study on large diameter drilling in hard rock annular coring

Based on analyzing method of large diameter hard rock drilling at home and abroad, the authors proposed a set of drilling of large diameter hard rock annular coring in low energy consumption, low cost and high efficiency. The prototype of drilling tools was designed and was made. The experimental result of the prototype indicates that this plan and technology are feasible and reach the anticipated object of design. A set of drilling tools has been offered for the constructs of large diameter hard rock coring.     

2000年最新气候指数资料

广东省气象台指数名称 6月 7月 8月 9月 10月 11月环流指数亚欧地区ｌｚ 97 72 11112 8114 116ｌｍ 4942 33 47 6 5 6 8亚洲地区ｌｚ 85 7810 6 14 812 6 12 5ｌｍ 493935 36 5 6 6 3西北太平洋副高指数面积指数 14 5 93 15 14强度指数 2 6 7 13 42 2 2 4脊线位置 2 42 830 0 2 42 2北界位置 2 7 3136 0 2 82 5西伸脊点 115 14 5 135 15 0 115 12 0亚洲区极涡面积指数 12 6 138130 15 7 2 0 1198南方涛动指数 (ＳＯＩ) -0 8-0 5 0 41 0 0 92 0太阳黑子相对数 14 0 6 175 2 12 3 .912 8.8110 .42000年最新气候指数资料…     

固体不极化电极

ＬＧＢ型固体不极化电极是中国地震局兰州地震研究所研制成功的高新科技产品,于1997年11月在北京通过了专家评审。鉴定结果认为:“固体不极化电极的载体选择、配方研究、技术性能都具有创新性,经与国内外同类电极相比,达到了国际先进水平。”目前,该产品已广泛应用于地矿部门、地震系统、水文物探、工程物探、石油物探、大地电磁测深、大型建设项目场地勘测和规划设计等各个方面,明显提高了电法勘探的质量和工作效率,取得了十分可喜的社会效益。性能特点1.极差电位小,稳定性能好,噪声低,频带宽,轻便耐用,易于保存,携带、使用方便。2.电解质…