Relationship between the δ 13C of tree ring cellulose from Pinus Koraiensis and climate parameters was investigated. A significantly negative correlation between δ 13C and mean low-cloud amount from May to July was ...Relationship between the δ 13C of tree ring cellulose from Pinus Koraiensis and climate parameters was investigated. A significantly negative correlation between δ 13C and mean low-cloud amount from May to July was discovered, which contributes to reconstructing the mean low-cloud amount from May to July at Antu in recent 200 years. Periodicals of quasi-8-year, quasi-4-year and quasi-2-year were detected both in δ 13C series and in the reconstructed low cloud amount series with 95% confidence level. Quasi-8-year period may reflect the integrated influence of solar activity, monsoon activity and local regional factors. Quasi-4-year and quasi-2-year periods indicate the influences of ENSO and Quasi Biennial Oscillation (QBO) of East Asian monsoon, respectively.展开更多
In two centuries ago, Ming Autu discovered the famous Catalan numbers while he tried to expand the function sin(2px) as power series of sin(x) for the case p = 1, 2, 3. Very recently, P. J. Larcombe shows that for any...In two centuries ago, Ming Autu discovered the famous Catalan numbers while he tried to expand the function sin(2px) as power series of sin(x) for the case p = 1, 2, 3. Very recently, P. J. Larcombe shows that for any p, sin(2px) can always be expressed as an infinite power series of sin(x) involving precise combinations of Catalan numbers as part of all but the initial p terms and gave all expansions for the case p = 4, 5. The present paper presents the desired expansion for arbitrary integer p.展开更多
安图县新合研究区位于柴达木—华北板块(Ⅲ)、华北陆块北部陆缘造山带(ⅢA)、哈兰达岭—英额岭新元古代—古生代叠覆造山亚带(ⅢA 1)中部。处于Ⅲ55吉中—延边(活动陆缘)Mo Au As Cu Zn Fe Ni W成矿带内,成矿地质条件和找矿前景较好。通...安图县新合研究区位于柴达木—华北板块(Ⅲ)、华北陆块北部陆缘造山带(ⅢA)、哈兰达岭—英额岭新元古代—古生代叠覆造山亚带(ⅢA 1)中部。处于Ⅲ55吉中—延边(活动陆缘)Mo Au As Cu Zn Fe Ni W成矿带内,成矿地质条件和找矿前景较好。通过1∶1万土壤地球化学测量,对10种成矿元素进行地球化学参数特征分析,圈定综合异常13处,重点对Ht1、Ht2和Ht5异常特征进行综合分析。在此基础上,结合成矿地质条件和矿化蚀变特征,优选出找矿靶区2处。对B1号找矿靶区Au元素异常浓集中心进行工程验证,发现1条金矿化蚀变带,带内见5条金矿体,进一步证实本区具有较好的找矿前景。展开更多
文摘Relationship between the δ 13C of tree ring cellulose from Pinus Koraiensis and climate parameters was investigated. A significantly negative correlation between δ 13C and mean low-cloud amount from May to July was discovered, which contributes to reconstructing the mean low-cloud amount from May to July at Antu in recent 200 years. Periodicals of quasi-8-year, quasi-4-year and quasi-2-year were detected both in δ 13C series and in the reconstructed low cloud amount series with 95% confidence level. Quasi-8-year period may reflect the integrated influence of solar activity, monsoon activity and local regional factors. Quasi-4-year and quasi-2-year periods indicate the influences of ENSO and Quasi Biennial Oscillation (QBO) of East Asian monsoon, respectively.
文摘In two centuries ago, Ming Autu discovered the famous Catalan numbers while he tried to expand the function sin(2px) as power series of sin(x) for the case p = 1, 2, 3. Very recently, P. J. Larcombe shows that for any p, sin(2px) can always be expressed as an infinite power series of sin(x) involving precise combinations of Catalan numbers as part of all but the initial p terms and gave all expansions for the case p = 4, 5. The present paper presents the desired expansion for arbitrary integer p.
文摘安图县新合研究区位于柴达木—华北板块(Ⅲ)、华北陆块北部陆缘造山带(ⅢA)、哈兰达岭—英额岭新元古代—古生代叠覆造山亚带(ⅢA 1)中部。处于Ⅲ55吉中—延边(活动陆缘)Mo Au As Cu Zn Fe Ni W成矿带内,成矿地质条件和找矿前景较好。通过1∶1万土壤地球化学测量,对10种成矿元素进行地球化学参数特征分析,圈定综合异常13处,重点对Ht1、Ht2和Ht5异常特征进行综合分析。在此基础上,结合成矿地质条件和矿化蚀变特征,优选出找矿靶区2处。对B1号找矿靶区Au元素异常浓集中心进行工程验证,发现1条金矿化蚀变带,带内见5条金矿体,进一步证实本区具有较好的找矿前景。
