Summer monsoon intensity controls C-4/C-3 plant abundance during the last 35 ka in the Chinese Loess Plateau: Carbon isotope evidence from bulk organic matter and individual leaf waxes

IEECAS SKLLQG

Did an extensive forest ever develop on the Chinese Loess Plateau during the past 130 ka?: a test using soil carbon isotopic signatures

IEECAS SKLLQG

巴丹吉林查格勒布剖面记录的150ka BP以来的常量化学元素波动

IEECAS SKLLQG

2．5ka BP以来额济纳绿洲沙丘的粒度特征及其反映的沉积过程

IEECAS SKLLQG

Neutron spectroscopic factors of Ar-34 and Ar-46 from (p,d) transfer reactions

Single-neutron-transfer measurements using (p,d) reactions have been performed at 33 MeV per nucleon with proton-rich Ar-34 and neutron-rich Ar-46 beams in inverse kinematics. The extracted spectroscopic factors are compared to the large-basis shell-model calculations. Relatively weak quenching of the spectroscopic factors is observed between Ar-34 and Ar-46. The experimental results suggest that neutron correlations have a weak dependence on the asymmetry of the nucleus over this isotopic region. The present results are consistent with the systematics established from extensive studies of spectroscopic factors and dispersive optical-model analyses of Ca40-49 isotopes. They are, however, inconsistent with the trends obtained in knockout-reaction measurements.

BP算法在辽宁观音阁水库枯季地表入库径流实时预报中的应用

根据太子河流域降水和产汇流特点 ,利用流域试点区观音阁水库枯季入库径流量、上游汛期降水量、汛末入库径流量和枯季降水量等实测系列资料 ,对所建立的BP神经网络模型进行训练、检验和对比分析 ,结果表明 ,所建立的枯季径流BP预报模型是合理可行的 ,并且具备较高的精度 ,可在同类地区推广使用