期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
中国利率规则模型构建及操作目标利率选择性研究——基于多元门限回归模型
1
作者 曲彬 刘扬 《华北金融》 2019年第7期12-22,共11页
本文着眼于以中国数据探索构建更适合于我国利率市场化进程的“价格型”工具调控规则模型。主要研究成果如下:第一,通过GARCH模型发现,厚尾波动较大残差的出现与我国市场化进程中实施重大政策在时点上达到较高程度的吻合,表明我国政策... 本文着眼于以中国数据探索构建更适合于我国利率市场化进程的“价格型”工具调控规则模型。主要研究成果如下:第一,通过GARCH模型发现,厚尾波动较大残差的出现与我国市场化进程中实施重大政策在时点上达到较高程度的吻合,表明我国政策宣告效应对金融市场影响显著,验证了我国利率市场化政策的有效性。第二,本文最大的贡献是利用门限变量的多元门限回归模型,探索构建更适合于我国国情的“价格型”工具调控规则模型,充分考虑了多次政策冲击对利率规则的影响,并探讨了随着货币政策调控框架向“价格型调控”的转型及我国利率市场化的逐步深入,低于门限值的利率规则将具有更强的适用性。第三,利用中国数据对比了三种我国金融市场短期利率作为我国操作目标利率的优劣,为中央银行选择基于“可控性、可测性、可得性”的政策操作目标提供参考。 展开更多
关键词 lww利率规则 产出缺口 目标通货膨胀率 多元门限回归模型
在线阅读 下载PDF
不同药剂处理对水稻幼苗抗寒性的影响 被引量:1
2
作者 李海林 罗斌 《安徽农业科学》 CAS 北大核心 2006年第22期5909-5911,共3页
研究3种药剂对水稻幼苗抗寒性生理生化指标的影响。结果表明:给水稻幼苗喷施适宜浓度的氯化钙加双氧水、复配硝酚钠和诱抗剂溶液能不同程度地减缓低温胁迫下细胞膜的损伤,提高水稻幼苗的抗寒力;试验还发现,不同保护剂之间的效果存在较... 研究3种药剂对水稻幼苗抗寒性生理生化指标的影响。结果表明:给水稻幼苗喷施适宜浓度的氯化钙加双氧水、复配硝酚钠和诱抗剂溶液能不同程度地减缓低温胁迫下细胞膜的损伤,提高水稻幼苗的抗寒力;试验还发现,不同保护剂之间的效果存在较大差异,喷施诱抗剂溶液的效果明显好于其他两种药剂。 展开更多
关键词 水稻幼苗 保护剂 低温胁迫 抗寒性
在线阅读 下载PDF
Intelligent acupuncture:data-driven revolution of traditional Chinese medicine 被引量:7
3
作者 Yunfan Bao Haokang Ding +4 位作者 Zhihan Zhang Kunhuan Yang Queena Tran Qi Sun Tiancheng Xu 《Acupuncture and Herbal Medicine》 2023年第4期271-284,共14页
Acupuncture,a form of traditional Chinese medicine with a history of 2,000 years in China,has gained wider acceptance worldwide as a complementary therapy.Studies have examined its effectiveness in various health cond... Acupuncture,a form of traditional Chinese medicine with a history of 2,000 years in China,has gained wider acceptance worldwide as a complementary therapy.Studies have examined its effectiveness in various health conditions and it is commonly used alongside conventional medical treatments.With the development of artificial intelligence(AI)technology,new possibilities for improving the efficacy and precision of acupuncture have emerged.This study explored the combination of traditional acupuncture and AI technology from three perspectives:acupuncture diagnosis,prescription,and treatment evaluation.The study aimed to provide cutting-edge direction and theoretical assistance for the development of an acupuncture robot. 展开更多
关键词 ACUPUNCTURE Artificial intelligence Knowledge graph Graphical abstract:http://links.lww.com/AHM/A68
在线阅读 下载PDF
A comprehensive review of azadirachtin: physicochemical properties, bioactivities, production, and biosynthesis 被引量:1
4
作者 Xinyao Su Zhipeng Liang +3 位作者 Qiang Xue Jia Liu Xuemi Hao Caixia Wang 《Acupuncture and Herbal Medicine》 2023年第4期256-270,共15页
Azadirachtin,a complex tetratriterpenoid limonin with potent insecticidal properties,is the most widely used biological pesticide worldwide.Its versatile pharmacological applications include the inhibition of tumor gr... Azadirachtin,a complex tetratriterpenoid limonin with potent insecticidal properties,is the most widely used biological pesticide worldwide.Its versatile pharmacological applications include the inhibition of tumor growth and anti-malarial,anti-bacterial,and anti-inflammatory properties.Azadirachtin plays a pivotal role in pest control and novel drug development.The primary source of azadirachtin is the neem tree(Azadirachta indica A.Juss),with an azadirachtin content ranging from 0.3%to 0.5%.Despite the market demand for botanical pesticides reaching approximately 100,000 tons per year,the annual neem production in China is only 1.14 tons.Although azadirachtin can be obtained through plant extraction or chemical synthesis,the quantity obtained does not meet the market demand in China.The sluggish pace of azadirachtin biosynthesis results from the limited availability of genetic information and the complexity of the synthetic pathway.Recent advancements in azadirachtin biosynthesis hold promise as an efficient collection method.In this study,we explored the physicochemical properties,biological activities,mechanisms of action,and acquisition methods of azadirachtin.We also delved into recent progress in azadirachtin biosynthesis and assessed potential future usage challenges.This study aims to establish a theoretical foundation for the scientific application and efficient synthesis of azadirachtin,offering valuable reference information to the industry. 展开更多
关键词 AZADIRACHTIN BIOSYNTHESIS Mechanism of action Neem Graphical abstract:http://links.lww.com/AHM/A79
暂未订购
Fractal Structures and Chaotic Behaviors in a (2+1)-Dimensional Nonlinear System
5
作者 马松华 张龄月 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第6期1117-1121,共5页
With a new projective equation, a series of solutions of the (2-J-1)-dimensional dispersive long-water wave system (LWW) is derived. Based on the derived solitary wave solution, we obtain some special fractal loca... With a new projective equation, a series of solutions of the (2-J-1)-dimensional dispersive long-water wave system (LWW) is derived. Based on the derived solitary wave solution, we obtain some special fractal localized structures and chaotic patterns. 展开更多
关键词 new projective equation (2+1)-dimensional lww system fractal structures chaotic behaviors
在线阅读 下载PDF
基于迁移学习和WCQRNN的SAR图像目标分类方法
6
作者 王春柳 侯宇超 王鹏 《数学的实践与认识》 2025年第10期276-288,共13页
针对SAR图像目标分类任务中源网络到目标网络层迁移选择的优化问题,文章提出一种结合基于元学习的迁移学习方法(LWW2T)和加权复合分位数回归神经网络(WCQRNN)的新方法.通过使用LWW2T提取网络层迁移权重及分轮次训练的SAR图像分类精度数... 针对SAR图像目标分类任务中源网络到目标网络层迁移选择的优化问题,文章提出一种结合基于元学习的迁移学习方法(LWW2T)和加权复合分位数回归神经网络(WCQRNN)的新方法.通过使用LWW2T提取网络层迁移权重及分轮次训练的SAR图像分类精度数据,利用WCQRNN对数据进行处理来获取最佳层迁移选择,以提升图像分类精度.基于MSTAR和SAMPLE数据集的实验结果表明,提出的方法在精度和稳定性上均优于LWW2T和CQRNN.其中,在MSTAR数据集上使用WCQRNN得到的图像分类精度均值较LWW2T提高了0.9834%,较CQRNN提高了0.3814%;在SAMPLE数据集上使用WCQRNN得到的图像分类精度均值较LWW2T提高了0.3898%,较CQRNN提高了0.4573%.此外,WCQRNN在提升图像分类精度的同时表现出更优的稳健性与泛化能力,证明其在SAR图像及其他小样本目标分类任务中的潜在应用价值. 展开更多
关键词 迁移学习 WCQRNN lww2T SAR图像目标分类
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部