Subjects: Psychology >> Developmental Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： A growing number of studies have recently focused on the functional significance of oxytocin (OT) in human social decision-making. With various experimental paradigms being developed, previous studies have shown that oxytocin (OT)plays an important regulatory role in interpersonal decision-making. In the OT research field, researchers have looked into many aspects of social decision-making, including cooperation and protection, morality, trust, generous behavior. Three possible hypotheses for oxytocin function were proposed to interpret current findings, however, no unified theory has yet been suggested to integrate all the observed phenomena. Future studies should focus on the physiological mechanisms of intranasal OT and receptor gene polymorphisms, take the gender differences into consideration, and establish a more appropriate and testable theoretical model.
Subjects: Agriculture, Forestry,Livestock & Aquatic Products Science >> Other Disciplines of Agriculture, Forestry,Livestock & Aquatic Products Science submitted time 2023-02-17 Cooperative journals: 《智慧农业（中英文）》
Abstract： Dissolved oxygen is an important environmental factor for prawn breeding. In order to improve the prediction accuracy of dissolved oxygen concentration in prawn pond, and solve the problem of low prediction accuracy of different frequency domain modal classification after empirical modal decomposition of nonlinear time series data when there are few training samples, an combination prediction model based on empirical mode decomposition (EMD), random forest (RF) and long short term memory neural network (LSTM) was proposed in this research. Firstly, the time series data of prawn breeding dissolved oxygen concentration were decomposed at multiple scales by EMD to obtain a set of stationary intrinsic mode function (IMF). Secondly, with fewer training samples, poor predicts effects on the low-frequency were verified component by LSTM. Then, IMF1－ IMF4 were divided into high-frequency components through test results and used for LSTM model. IMF5－IMF7, Rn were divided for RF model, the EMD-RF-LSTM combination model was constructed to improve the prediction accuracy. Modeled lowfrequency and high-frequency components IMF using RF and LSTM, then predictions of each component were accumulated and the prediction value of dissolved oxygen of sequence data were got. Finally, the performance of the model was compared with the limit learning machine (ELM), RF, standard LSTM, EMD-ELM and EMD-RF, EMD-LSTM, etc. In the test based on real dataset, the EMD-ELM model contrasted with ELM model, reduced the mean absolute error (MAPE), root mean square error (RMSE) and mean absolute error (MAE) by 30.11%, 29.60% and 32.95%, respectively. The MAPE, RMSE, MAE for the proposed models were 0.0129, 0.1156, 0.0844, respectively. MAPE decreased by 84.07%, 57.57%, and 49.81% compared with EMD-ELM, EMD-RF and EMD-LSTM, respectively, the prediction accuracy was significantly improved. The results show that the proposed model EMD-RF-LSTM has good prediction performance and generalization ability, which is meets the actual demand of accurate prediction of dissolved oxygen concentration in prawn culture, and can provide reference for the prediction and early warning of prawn pond water quality.
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-11 Cooperative journals: 《干旱区研究》
Abstract：利用1971—2015年内蒙古地区52个气象站逐月降水量观测数据，采用降水量距平百分率(Pa)，从干旱频率和干旱变化趋势率分析了研究区近45 a来干旱时空分布特征。结果表明：从时间变化来看，年降水量呈微弱的下降趋势，并于1998年和2012年发生突变；春季、秋季和冬季降水量变化呈上升趋势，夏季降水量变化呈下降趋势；年尺度干旱主要发生在1999—2011年；季节尺度干旱发生频率为冬旱>春旱>秋旱>夏旱。从空间变化来看，多年平均降水量由东向西呈逐级递减趋势，降水分布地域特征明显，大兴安岭以东地区和巴彦淖尔市西部地区降水变化趋势率较高，呼伦贝尔市西北部、通辽市中南部、赤峰市中部、阿拉善盟西部地区降水变化趋势率较低；发生不同等级干旱的几率为轻旱>特旱>中旱>重旱，各级干旱易发生地区集中在呼伦贝尔市西部、赤峰市中北部、通辽市北部、锡林郭勒盟中西部以及阿拉善盟西部地区。Pa变化趋势率表现为，呼伦贝尔市中东部、巴彦淖尔市西部和阿拉善盟东部呈上升趋势，即干旱程度减轻；兴安盟南部至鄂尔多斯市、阿拉善盟中西部呈下降趋势，即干旱程度加重。
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