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Can Technical Indicators Provide Information for Future Volatility:International Evidence

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Journal of Systems Science and Information 2020年第1期11卷 53-66页

作者： Yafeng SHI Xiangxing TAO Yanlong SHI Nenghui ZHU tingting ying Xun PENG School of Science Ningbo University of TechnologyNingbo 315211China School of Science Zhejiang University of Science and TechnologyHangzhou 310023China Zhejiang Pharmaceutical College Ningbo 315100China School of Applied Mathematics Xiamen University of TechnologyXiamen 361024China Nottingham University Business School University of Nottingham Ningbo ChinaNingbo 315100China GuangDong Guangya High School Guangzhou 510160China

We employ the static and dynamic copula models to investigate whether technical indicators provide information on volatility in the next trading day,where the volatility is measured by daily realized *** empirical results,based on long samples of 8 well-known stock indexes,suggest that a significant and asymmetric tail dependence between the technical indicators based on moving average and the next day *** level of dependence change over time in a persistent *** the dependence structure presents some distinct differences between emerging market indexes and developed market *** results indicate that the technical indicators can provide information on the next day volatility at extremes,and are less informative at normal market.

关键词： volatility technical indicator tail dependence copula high frequency data

Coupled interactive effects of ammonia and hydrogen additions on ethylene diffusion flames: A detailed kinetic study

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Science China(Technological Sciences) 2024年第3期67卷 930-948页

作者： XIAO JiaYi XU tingting SHU ZhiMei DENG QiGe ZHAO Xuan ying YaoYao LI TianJiao LIU Dong MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Advanced Combustion Laboratory School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing210094China

In order to create effective combustion technologies and fuels with low or no carbon emissions,the research was conducted to assess the coupled interactive effects of NH_(3) and H_(2) additions on ethylene counterflow diffusion flames from a kinetic *** effects of the NH_(3)/H_(2) combination on flame temperatures,major species,key radicals,important intermediate species,representative oxygenated species and NO_xwere *** results of the study utilizing fictitious inert NH_(3) and/or H_(2) revealed the chemical effects of the two *** was found that the NH_(3)/H_(2) coupled effects had a more effective inhibitory effect on soot precursors than the effects of corresponding sum of single NH_(3) or H_(2) *** production of soot precursors was promoted by the coupled chemical effects of NH_(3) and H_(2),but the coupled dilution and thermal effects were observed to have a greater impact,resulting in a decrease of the mole fractions of soot *** for the interaction of NH_(3) and H_(2) effects,the presence of H_(2) decreased the chemical effects of NH_(3) on the augmentation of C_(2)H_(2),A1,A2,and CH_(3)CHO mole *** NH_(3) addition alleviated the H_(2) chemical effects on increasing C_(2)H_(2),C_(3)H_(3),A1 and A2 ***,the NH_(3)chemical effects on C_(3)H_(3),OH and CH_(3)CHO were enhanced when H_(2) was *** presence of NH_(3) augmented the chemical effects of H_(2) on the growth of OH mole ***,the H_(2) chemical effects hindered the production of NO and NO_(2) in the presence of NH_(3).

关键词： NH_(3)/H_(2)addition kinetic analysis coupled interactive effects chemical effects

Comprehensive kinetic study on ammonia/ethylene counter-flow diffusion flames:influences of diluents

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International Journal of Coal Science & Technology 2024年第1期11卷 232-249页

作者： Zhimei Shu tingting Xu Jiayi Xiao Qige Deng Xuan Zhao Tianjiao Li Yaoyao ying Dong Liu MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing210094China Advanced Combustion Laboratory School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing210094China

This study aimed to investigate the effects of ammonia addition on ethylene counter-flow diffusion flames with different diluents on the fuel or oxidizer side,using kinetic analyses.A special emphasis was put on assessing the coupled chemical effects of NH_(3) and CO_(2) on C2H4 combustion *** chemical effects could be evaluated by comparing fictitious inert NH_(3) or CO_(2) with normal active NH_(3) or CO_(2).The results revealed that the addition of NH_(3) decreased the mole fractions and production rates of key soot precursors,such as acetylene,propynyl,and *** CO_(2) was used as the dilution gas,the coupled chemical effects of NH_(3) and CO_(2) were affected by the chemical effects of CO_(2) to varying *** the oxidizer-side CO_(2) addition,the coupled chemical effects of NH_(3) and CO_(2) reduced the mole fractions of H,O,OH radicals,acetylene,propynyl,and benzene,while the effects differed from the fuel-side CO_(2) *** coupled chemical effects of NH_(3) and CO_(2) also promoted the formation of aldehyde contaminants,such as acetaldehyde,to some extent,particularly with CO_(2) addition on the oxidizer side.

关键词： Ammonia addition Diluents Coupled chemical effects Kinetic analysis

Magnesium fertilizer application increases peanut growth and pod yield under reduced nitrogen application in southern China

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The Crop Journal 2024年第3期12卷 915-926页

作者： Yu Gao Ruier Zeng Suzhe Yao ying Wang Jianguo Wang Shubo Wan Wei Hu tingting Chen Lei Zhang Guangdong Provincial Key Laboratory of Plant Molecular Breeding College of AgricultureSouth China Agricultural UniversityGuangzhou 510642GuangdongChina Shandong Academy of Agricultural Sciences Jinan 250100ShandongChina College of Agriculture Nanjing Agricultural UniversityNanjing 210095JiangsuChina

This study investigated the effect of magnesium application on peanut growth and yield under two nitrogen(N)application rates in acidic soil in southern *** chlorophyll content,net photosynthetic rate and dry matter accumulation of the N-sensitive cultivar decreased under reduced N treatments,whereas no effect was observed on the relevant indicators in the N-insensitive variety *** application increased the net photosynthetic rate by increasing the expression of genes involved in chlorophyll synthesis and Rubisco activity in the leaves during the pegging stage under 50%N treatment,while no effect on the net photosynthetic rate was observed under the 100%N *** rate of dry matter accumulation at the early growth stage,total dry matter accumulation and pod yield at harvest increased after Mg application under 50%N treatment by increasing the transportation of assimilates from stems and leaves to pods in both peanut varieties,whereas no effect was found under 100%N ***,Mg application increased the NUE under 50%N *** improvement of NUE in either peanut variety was found under 100%N treatment,while Mg application under the 50%N treatment can obtain a higher economic benefit than the 100%N *** acidic soil,application of 307.5 kg ha^(-1)of Mg sulfate fertilizer under 50%reduced nitrogen application is a suitable fertilizer management measure for improving carbon assimilation,NUE and achieve high peanut yields in southern China.

关键词： Peanut Magnesium Yield Reduced nitrogen application rate

牛乳清粉掺伪羊乳粉的近红外光谱法快速无损检测

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中国食品学报 2017年第8期17卷 261-267页

作者：邹婷婷王莹宋焕禄北京食品营养与人类健康高精尖创新中心/食品添加剂与配料北京高校工程研究中心北京工商大学北京100048 吉林省食品检验所长春130022

为快速无损检测掺伪羊乳粉中牛乳清粉的含量,采用近红外光谱法(NIR)结合ν-支持向量回归(ν-SVR)检测197个掺伪牛乳清粉的羊乳粉,并与偏最小二乘法(PLS)对比,光谱经平滑、标准变量变换及导数预处理。随机选取132个样本作为校正集建立模... 详细信息

为快速无损检测掺伪羊乳粉中牛乳清粉的含量,采用近红外光谱法(NIR)结合ν-支持向量回归(ν-SVR)检测197个掺伪牛乳清粉的羊乳粉,并与偏最小二乘法(PLS)对比,光谱经平滑、标准变量变换及导数预处理。随机选取132个样本作为校正集建立模型,其余65个样本作为测试集,评估模型性能。结果显示:校正集最优模型为标准变量变换、Savitzky-Golay平滑和二阶导预处理ν-SVR模型,其交叉验证误差均方根(RMSECV)为0.586,交叉验证相关系数(RCV)达到0.9947。预测集验证结果ν-SVR法比PLS法更优,ν-SVR模型预测值与真实值R达到0.9958,RMSEP为0.526。试验结果表明NIR结合ν-SVR模型可用于掺伪羊乳粉中牛乳清粉的快速无损检测,而且操作简便,可为实际应用提供参考。

关键词：近红外光谱技术羊乳粉 ν-支持向量回归牛乳清粉定量分析

科技创新、金融发展与产业结构升级——基于贝叶斯分位数回归的分析

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科技管理研究 2017年第5期37卷 1-8页

作者：谢婷婷赵莺石河子大学经济与管理学院兵团金融发展研究中心新疆石河子832000

以中国1985—2014年的时间序列数据为样本,运用贝叶斯分位数方法实证分析科技创新、金融发展与产业结构升级的关系。研究结论为:科技创新和金融发展均能促进产业结构升级,但是二者对产业结构升级的提升程度存在差异,科技创新对产业结构... 详细信息

以中国1985—2014年的时间序列数据为样本,运用贝叶斯分位数方法实证分析科技创新、金融发展与产业结构升级的关系。研究结论为:科技创新和金融发展均能促进产业结构升级,但是二者对产业结构升级的提升程度存在差异,科技创新对产业结构升级的提升程度小于金融发展,金融发展水平的提高对产业结构升级的提升作用较大,而科技创新对产业结构升级的影响呈现出倒"U"型关系且对产业结构升级的提升作用不明显。提出推行"大数据、网络化、智能化"的创新发展模式,以及推动金融供给侧改革和加快科技金融发展等建议。

关键词：科技创新金融发展产业结构升级贝叶斯分位数

Two antibodies show broad,synergistic neutralization against SARS-CoV-2 variants by inducing conformational change within the RBD

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Protein & Cell 2024年第2期15卷 121-134页

作者： Hui Sun tingting Deng Yali Zhang Yanling Lin Yanan Jiang Yichao Jiang Yang Huang Shuo Song Lingyan Cui tingting Li Hualong Xiong Miaolin Lan Liqin Liu Yu Li Qianjiao Fang Kunyu Yu Wenling Jiang Lizhi Zhou Yuqiong Que Tianying Zhang Quan Yuan Tong Cheng Zheng Zhang Hai Yu Jun Zhang Wenxin Luo Shaowei Li Qingbing Zheng ying Gu Ningshao Xia State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics School of Public HealthSchool of Life SciencesXiamen UniversityXiamen 361102China National Institute of Diagnostics and Vaccine Development in Infectious Diseases School of Public HealthSchool of Life SciencesXiamen UniversityXiamen 361102China State Key Laboratory of Vaccines for Infectious Diseases School of Public HealthSchool of Life SciencesXiamen UniversityXiamen 361102China Xiang An Biomedicine Laboratory Xiamen 361102China Institute for Hepatology National Clinical Research Center for Infectious DiseaseShenzhen Third People's HospitalSchool of MedicineSouthem University of Science and TechnologyShenzhen 518112China The Second Affliated Hospital School of MedicineSouthern University of Science and TechnologyShenzhen 518112China Research Unit of Frontier Technology of Structural Vaccinology Chinese Academy of Medical SciencesXiamen 361102China

Continual evolution of the severe acute respiratory syndrome coronavirus(SARS-CoV-2)virus has allowed for its gradual evasion of neutralizing antibodies(nAbs)produced in response to natural infection or *** rapid nature of these changes has incited a need for the development of superior broad nAbs(bnAbs)and/or the rational design of an antibody cocktail that can protect against the mutated virus ***,we report two angiotensin-converting enzyme 2 competing nAbs—8H12 and 3E2—with synergistic neutralization but evaded by some Omicron ***-electron microscopy reveals the two nAbs synergistic neutralizing virus through a rigorous pairing permitted by rearrangement of the 472-489 loop in the receptor-binding domain to avoid steric *** antibodies based on these two nAbs tremendously extend the neutralizing breadth and restore neutralization against recent variants including currently dominant ***,these findings expand our understanding of the potential strategies for the neutralization of SARS-CoV-2 variants toward the design of broad-acting antibody therapeutics and vaccines.

关键词： SARS-CoV-2 broad neutralizing antibody rearrangement synergistic neutralization

赖氨酸维B12合剂联合西沙比利对功能性消化不良腹痛患儿肠道菌群及胃肠功能的影响

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中国微生态学杂志 2024年第2期36卷 201-205页

作者：阎婷婷聂莹杨莹临汾市妇幼保健院儿童医院儿三科山西041000

目的探讨赖氨酸维B12合剂联合西沙比利对功能性消化不良(FD)腹痛患儿肠道菌群及胃肠功能的影响,以期为临床提供参考。方法选取2022年5月至2023年6月于本院收治的90例FD伴腹痛患儿,采用简单随机分组将患儿分为单一组(n=45)和联合组(n=45)... 详细信息

目的探讨赖氨酸维B12合剂联合西沙比利对功能性消化不良(FD)腹痛患儿肠道菌群及胃肠功能的影响,以期为临床提供参考。方法选取2022年5月至2023年6月于本院收治的90例FD伴腹痛患儿,采用简单随机分组将患儿分为单一组(n=45)和联合组(n=45),单一组患儿采用西沙比利治疗,联合组患儿采用赖氨酸维B12合剂联合西沙比利治疗。比较两组患儿的疗效,治疗前后患儿的肠道菌群、胃肠功能和疼痛程度,记录两组患儿治疗期间的不良反应发生情况。结果联合组患儿治疗的有效率为95.56%,单一组为82.22%,差异有统计学意义(χ^(2)=4.050,P0.05)。结论赖氨酸维B12合剂联合西沙比利治疗FD伴腹痛患儿具有较好的临床疗效且无明显不良反应,可以缓解腹痛,改善肠道菌群和胃肠功能。

关键词：赖氨酸维B12合剂西沙比利功能性消化不良腹痛肠道菌群胃肠功能

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浅谈高职高专院校运输行业英语的教学

科教导刊 2013年第28期 159-160页

作者：应婷婷湖南高速铁路职业技术学院湖南衡阳421001

当前高职高专院校的运输行业英语的教学尚存在许多不足。本文从高职高专院校中能胜任运输行业英语教学的师资力量的缺乏、运输行业英语教材及课外阅读资料的缺乏、许多高职高专院校对运输行业英语教学的重要性认识不足这三方面阐述了高... 详细信息

当前高职高专院校的运输行业英语的教学尚存在许多不足。本文从高职高专院校中能胜任运输行业英语教学的师资力量的缺乏、运输行业英语教材及课外阅读资料的缺乏、许多高职高专院校对运输行业英语教学的重要性认识不足这三方面阐述了高职高专院校铁路运输行业英语教学中存在的问题,并且根据这些问题提出了解决高职高专院校运输行业英语教学问题的对策。

关键词：高职高专院校运输行业英语师资力量行业英语教材