Let f be a continuous map on infra-solvmanifold M of type(R)and N^(∞)(f)be the asymptotic Nielsen number of f.In this paper,the sufficient conditions to assure that log N^(∞)(f)is the infimum of topological entropie...Let f be a continuous map on infra-solvmanifold M of type(R)and N^(∞)(f)be the asymptotic Nielsen number of f.In this paper,the sufficient conditions to assure that log N^(∞)(f)is the infimum of topological entropies of the homotopy class of the map f are given by using Nielsen fixed point theory.These conclusions will generalize the similar results on infra-nilmanifolds.展开更多
In this study, a new R-δf-type welding window on charge parameters is constructed by determining the boundary conditions of the explosive ratio. The R-δf-type welding window synthetically considers the explosive pro...In this study, a new R-δf-type welding window on charge parameters is constructed by determining the boundary conditions of the explosive ratio. The R-δf-type welding window synthetically considers the explosive properties and material properties, and can quickly determine the explosive charge at different welding materials with different thickness. In order to test the practicability and accuracy of the R-δf-type welding window, 410S stainless steel and Q345R low alloy steel plates were explosively welded using 15 mm charge determined by the new window. Microstructures of the bonded sections were examined and then shear tests were carried out on the bonded specimens. Microstructural examination showed the joint interface was transformed from micro wavy to small wavy appearance without microstructure defects. Shear tests results showed inter inacial shear strength was much higher than that of the national first grade standard. So the R-δf-type welding window has strong practicability and accuracy and is helpful to the practical production and application of explosive welding composite materials.展开更多
目的:基于R语言初步探讨儿童抽动障碍(TD)合并注意缺陷多动障碍(ADHD)的证型证素及中医用药规律。方法:计算机检索CNKI、万方、维普、CBM、PubMed、the Cochrane Library、EMBase、Web of Science等数据中建库至2023年11月10日收录的所...目的:基于R语言初步探讨儿童抽动障碍(TD)合并注意缺陷多动障碍(ADHD)的证型证素及中医用药规律。方法:计算机检索CNKI、万方、维普、CBM、PubMed、the Cochrane Library、EMBase、Web of Science等数据中建库至2023年11月10日收录的所有中医药治疗TD合并ADHD的文献,采用Excel软件筛选文献,对证型证素及中药规范化整理后,建立数据库,运用R语言及RStudio软件进行相应的数据挖掘,包括关联分析和聚类分析,探索儿童TD合并ADHD证型证素分布及中药分布规律。结果:最终纳入23篇文献。共得到20个证型,频次最高的证型为风痰内扰证,共提取证素16个,主要病位证素是肝、肾、脾、心,主要病性证素是阳亢、阴虚、动风、外风、痰,关联分析后得到支持度和置信度最高的组合是外风-动风。聚类分析后可得到5个聚类组:(1)痰、动风、外风;(2)肝、阳亢、肾、阴虚;(3)脾、气虚;(4)心、火/热、津亏;(5)胃、血虚、气滞、精亏。共纳入中药98味,其中14味频次≥10,排名前5为白芍、龙骨、钩藤、远志、天麻;分为18类,主要为补虚药、解表药、清热药、安神药、息风止痉药;主归肝、心、肺、脾、肾经;关联规则与聚类分析形成以白芍、熟地黄、天麻、钩藤、石决明、全蝎、珍珠母、龙骨、远志9味药为基础的核心药物组方。结论:儿童TD合并ADHD病位在肝、肾、脾、心,常见病性证素为阴虚、阳亢、动风、外风、痰,以养血滋阴、平肝息风、清热安神为主要治则,核心组方为白芍、熟地黄、天麻、钩藤、石决明、全蝎、珍珠母、龙骨、远志,需根据辨证灵活加减组方。展开更多
目的:利用R语言数据挖掘技术分析脓毒症的中医证型及用药规律,为脓毒症临床中医诊疗方案提供参考。方法:通过检索PubMed、Web of Science、中国知网、万方、维普和中国生物医学文献数据库,收集从建库至2023年12月31日收录的符合纳入标...目的:利用R语言数据挖掘技术分析脓毒症的中医证型及用药规律,为脓毒症临床中医诊疗方案提供参考。方法:通过检索PubMed、Web of Science、中国知网、万方、维普和中国生物医学文献数据库,收集从建库至2023年12月31日收录的符合纳入标准的中医药治疗脓毒症临床研究文献,建立相关处方数据库。运用Excel整理并分析方药信息,包括中医辨证分型、治法治则,中药的使用频次、性味、归经、功效等;并利用R语言进行关联规则分析及聚类分析。结果:共检索出文献10345篇,纳入分析280篇,涉及中药215味,其中排名前10的中药分别是大黄、甘草、赤芍、厚朴、黄芪、芒硝、黄芩、丹参、地黄、枳实;四气以寒、温为主,五味以苦、甘、辛为主,归经以脾、胃、肺为主,功效以清热、补虚、泻下为主,证型以热毒内盛证、瘀毒内阻证为主。关联规则分析得到核心组方为大黄、芒硝、枳实、厚朴、当归、川芎、赤芍、桃仁、地黄、红花。高频药物聚类分析得到4个聚类群,适用于不同证型。结论:治疗脓毒症的用药规律以清热、泻下、化瘀、补虚为主,核心证型-处方有4类,临床上应根据患者的证候特点进行辨证论治,在核心证型-处方的基础上随证加减。展开更多
The main aim of this article is to prove that the maximal operator σ^k＊ of the Marcinkiewicz-Fejer means of the two-dimensional Fourier series with respect to Walsh- Kaczmarz system is bounded from the Hardy space H...The main aim of this article is to prove that the maximal operator σ^k＊ of the Marcinkiewicz-Fejer means of the two-dimensional Fourier series with respect to Walsh- Kaczmarz system is bounded from the Hardy space H2/3 to the space weak-L2/3.展开更多
In this paper, we discuss the boundedness of Marcinkiewicz integral μΩ with homogeneous kernel on the weighted Herz-type Hardy spaces, and prove that μΩ is bounded from HKq^a、P（ω1;ω2） into Kq^a、p （ω1; ω2）.
用自燃烧法低温合成了单相 (Sr,Pb) Ti O3陶瓷粉末 ,研究和确定了自燃烧反应的 p H值条件 ,分析了自燃烧反应历程。测量了 (Sr,Pb) Ti O3的居里温度及 Y掺杂陶瓷阻 -温特性。结果表明 ,(Sr,Pb) Ti O3的居里温度较理论计算值稍有偏移。...用自燃烧法低温合成了单相 (Sr,Pb) Ti O3陶瓷粉末 ,研究和确定了自燃烧反应的 p H值条件 ,分析了自燃烧反应历程。测量了 (Sr,Pb) Ti O3的居里温度及 Y掺杂陶瓷阻 -温特性。结果表明 ,(Sr,Pb) Ti O3的居里温度较理论计算值稍有偏移。典型陶瓷样品的电阻升阻比为 4.2 ,V型特性明显。Y掺杂陶瓷样品的电阻率与 Y掺杂量之间关系符合一般稀土掺杂规律。展开更多
基金Supported by Research Foundation of Bozhou for the Introduction of Talents,Natural Science Foundation of Anhui Province(Grant No.KJ2019A1300)。
文摘Let f be a continuous map on infra-solvmanifold M of type(R)and N^(∞)(f)be the asymptotic Nielsen number of f.In this paper,the sufficient conditions to assure that log N^(∞)(f)is the infimum of topological entropies of the homotopy class of the map f are given by using Nielsen fixed point theory.These conclusions will generalize the similar results on infra-nilmanifolds.
基金supported by the National Natural Science Foundation of China(Grant No.51541112)
文摘In this study, a new R-δf-type welding window on charge parameters is constructed by determining the boundary conditions of the explosive ratio. The R-δf-type welding window synthetically considers the explosive properties and material properties, and can quickly determine the explosive charge at different welding materials with different thickness. In order to test the practicability and accuracy of the R-δf-type welding window, 410S stainless steel and Q345R low alloy steel plates were explosively welded using 15 mm charge determined by the new window. Microstructures of the bonded sections were examined and then shear tests were carried out on the bonded specimens. Microstructural examination showed the joint interface was transformed from micro wavy to small wavy appearance without microstructure defects. Shear tests results showed inter inacial shear strength was much higher than that of the national first grade standard. So the R-δf-type welding window has strong practicability and accuracy and is helpful to the practical production and application of explosive welding composite materials.
文摘目的:基于R语言初步探讨儿童抽动障碍(TD)合并注意缺陷多动障碍(ADHD)的证型证素及中医用药规律。方法:计算机检索CNKI、万方、维普、CBM、PubMed、the Cochrane Library、EMBase、Web of Science等数据中建库至2023年11月10日收录的所有中医药治疗TD合并ADHD的文献,采用Excel软件筛选文献,对证型证素及中药规范化整理后,建立数据库,运用R语言及RStudio软件进行相应的数据挖掘,包括关联分析和聚类分析,探索儿童TD合并ADHD证型证素分布及中药分布规律。结果:最终纳入23篇文献。共得到20个证型,频次最高的证型为风痰内扰证,共提取证素16个,主要病位证素是肝、肾、脾、心,主要病性证素是阳亢、阴虚、动风、外风、痰,关联分析后得到支持度和置信度最高的组合是外风-动风。聚类分析后可得到5个聚类组:(1)痰、动风、外风;(2)肝、阳亢、肾、阴虚;(3)脾、气虚;(4)心、火/热、津亏;(5)胃、血虚、气滞、精亏。共纳入中药98味,其中14味频次≥10,排名前5为白芍、龙骨、钩藤、远志、天麻;分为18类,主要为补虚药、解表药、清热药、安神药、息风止痉药;主归肝、心、肺、脾、肾经;关联规则与聚类分析形成以白芍、熟地黄、天麻、钩藤、石决明、全蝎、珍珠母、龙骨、远志9味药为基础的核心药物组方。结论:儿童TD合并ADHD病位在肝、肾、脾、心,常见病性证素为阴虚、阳亢、动风、外风、痰,以养血滋阴、平肝息风、清热安神为主要治则,核心组方为白芍、熟地黄、天麻、钩藤、石决明、全蝎、珍珠母、龙骨、远志,需根据辨证灵活加减组方。
文摘目的:利用R语言数据挖掘技术分析脓毒症的中医证型及用药规律,为脓毒症临床中医诊疗方案提供参考。方法:通过检索PubMed、Web of Science、中国知网、万方、维普和中国生物医学文献数据库,收集从建库至2023年12月31日收录的符合纳入标准的中医药治疗脓毒症临床研究文献,建立相关处方数据库。运用Excel整理并分析方药信息,包括中医辨证分型、治法治则,中药的使用频次、性味、归经、功效等;并利用R语言进行关联规则分析及聚类分析。结果:共检索出文献10345篇,纳入分析280篇,涉及中药215味,其中排名前10的中药分别是大黄、甘草、赤芍、厚朴、黄芪、芒硝、黄芩、丹参、地黄、枳实;四气以寒、温为主,五味以苦、甘、辛为主,归经以脾、胃、肺为主,功效以清热、补虚、泻下为主,证型以热毒内盛证、瘀毒内阻证为主。关联规则分析得到核心组方为大黄、芒硝、枳实、厚朴、当归、川芎、赤芍、桃仁、地黄、红花。高频药物聚类分析得到4个聚类群,适用于不同证型。结论:治疗脓毒症的用药规律以清热、泻下、化瘀、补虚为主,核心证型-处方有4类,临床上应根据患者的证候特点进行辨证论治,在核心证型-处方的基础上随证加减。
基金supported by project TMOP-4.2.2.A-11/1/KONV-2012-0051,Shota Rustaveli National Science Foundation grant no.13/06(Geometry of function spaces,interpolation and embedding theorems)
文摘The main aim of this article is to prove that the maximal operator σ^k＊ of the Marcinkiewicz-Fejer means of the two-dimensional Fourier series with respect to Walsh- Kaczmarz system is bounded from the Hardy space H2/3 to the space weak-L2/3.
文摘In this paper, we discuss the boundedness of Marcinkiewicz integral μΩ with homogeneous kernel on the weighted Herz-type Hardy spaces, and prove that μΩ is bounded from HKq^a、P（ω1;ω2） into Kq^a、p （ω1; ω2）.
文摘用自燃烧法低温合成了单相 (Sr,Pb) Ti O3陶瓷粉末 ,研究和确定了自燃烧反应的 p H值条件 ,分析了自燃烧反应历程。测量了 (Sr,Pb) Ti O3的居里温度及 Y掺杂陶瓷阻 -温特性。结果表明 ,(Sr,Pb) Ti O3的居里温度较理论计算值稍有偏移。典型陶瓷样品的电阻升阻比为 4.2 ,V型特性明显。Y掺杂陶瓷样品的电阻率与 Y掺杂量之间关系符合一般稀土掺杂规律。
