期刊文献+
共找到157篇文章
< 1 2 8 >
每页显示 20 50 100
Mathematical rules for synergistic,additive,and antagonistic effects of multi-drug combinations and their application in research and development of combinatorial drugs and special medical food combinations 被引量:3
1
作者 Shoujun Yuan Haoyu Chen 《Food Science and Human Wellness》 SCIE 2019年第2期136-141,共6页
Multi-drug(or multi-element)combinations are often prescribed in the practice of clinical medicine and as foods for special medical purposes.The main motivations for these combinations are that most diseases contain m... Multi-drug(or multi-element)combinations are often prescribed in the practice of clinical medicine and as foods for special medical purposes.The main motivations for these combinations are that most diseases contain multiple related targets and an appropriate combination can maximize benefits while minimizing adverse reactions.As such,it is especially important to derive mathematical models for their quantitative calculation.In this paper,we introduce mathematical rules for the synergistic,additive,and antagonistic effects of multi-drug combinations developed in our laboratory.We have established a“onebelt,one-line”model and provide examples of the quantitative calculation of the synergistic,additive,and antagonistic effects of a combination of multiple components.We also explain how to scientifically and precisely determine the intensity of these synergies,additions and antagonisms,as well as their corresponding dose ranges,thereby laying a solid theoretical foundation for market listing combinatorial drugs and foods for special medical purposes. 展开更多
关键词 Multi-drug combination Dose-effect belt One-belt one-line model Foods for special medical purposes synergy Addition ANTAGONISM
下载PDF
Dark Energy Explained via the Hawking-Hartle Quantum Wave and the Topology of Cosmic Crystallography 被引量:1
2
作者 Mohamed S. El Naschie Atef Helal 《International Journal of Astronomy and Astrophysics》 2013年第3期318-343,共26页
The aim of the present paper is to explain and accurately calculate the missing dark energy density of the cosmos by scaling the Planck scale and using the methodology of the relatively novel discipline of cosmic crys... The aim of the present paper is to explain and accurately calculate the missing dark energy density of the cosmos by scaling the Planck scale and using the methodology of the relatively novel discipline of cosmic crystallography and Hawking-Hartle quantum wave solution of Wheeler-DeWitt equation. Following this road we arrive at a modified version of Einstein’s energy mass relation E = mc2 which predicts a cosmological energy density in astonishing accord with the WMAP and supernova measurements and analysis. We develop non-constructively what may be termed super symmetric Penrose fractal tiling and find that the isomorphic length of this tiling is equal to the self affinity radius of a universe which resembles an 11 dimensional Hilbert cube or a fractal M-theory with a Hausdorff dimension where. It then turns out that the correct maximal quantum relativity energy-mass equation for intergalactic scales is a simple relativistic scaling, in the sense of Weyl-Nottale, of Einstein’s classical equation, namely EQR = (1/2)(1/) moc2 = 0.0450849 mc2 and that this energy is the ordinary measurable energy density of the quantum particle. This means that almost 95.5% of the energy of the cosmos is dark energy which by quantum particle-wave duality is the absolute value of the energy of the quantum wave and is proportional to the square of the curvature of the curled dimension of spacetime namely where and is Hardy’s probability of quantum entanglement. Because of the quantum wave collapse on measurement this energy cannot be measured using our current technologies. The same result is obtained by involving all the 17 Stein spaces corresponding to 17 types of the wallpaper groups as well as the 230-11=219 three dimensional crystallographic group which gives the number of the first level of massless particle-like states in Heterotic string theory. All these diverse subjects find here a unified view point leading to the same result regarding the missing dark energy of the universe, which turned out to by synonymous with the absolute value of the energy of the Hawking-Hartle quantum wave solution of Wheeler-DeWitt equation while ordinary energy is the energy of the quantum particle into which the Hawking-Hartle wave collapse at cosmic energy measurement. In other words it is in the very act of measurement which causes our inability to measure the “Dark energy of the quantum wave” in any direct way. The only hope if any to detect dark energy and utilize it in nuclear reactors is future development of sophisticated quantum wave non-demolition measurement instruments. 展开更多
关键词 Doubly special RELATIVITY Week’s Manifold Experimental Test of Einstein’s RELATIVITY Witten’s M-theORY ordinary Energy of the QUANTUM Particle Hawking-Hartle WAVE of Cosmos Crystallographic Symmetry Groups REVISING special RELATIVITY
下载PDF
Determining the Neutrino Mass Eigenstates and the Effective Majorana Mass 被引量:1
3
作者 Zoran B. Todorovic 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2022年第3期593-622,共30页
This paper aims at solving several open questions in current neutrino physics: the neutrino mass hierarchy, the Dirac CP violating phase, the absolute mass of neutrinos, the nature of neutrinos (Dirac or Majorana), th... This paper aims at solving several open questions in current neutrino physics: the neutrino mass hierarchy, the Dirac CP violating phase, the absolute mass of neutrinos, the nature of neutrinos (Dirac or Majorana), the Majorana matrix and the absolute value of the effective Majorana neutrino mass. In the research presented in this paper, we have shown that the precise definition of the mass splittings between neutrino mass eigenstates, done in the latest analysis of experimental data, can be of crucial importance for defining the nature of neutrino mass hierarchy. The Standard Model has three generations of fundamental matter particles. Three generations of the charged lepton mass show a hierarchical structure: m<sub>τ</sub> > m<sub>μ</sub> > m<sub>e</sub>. Owing to that, there is a belief and it is considered that neutrinos may follow such hierarchical structure. In our calculations, we have also included the latest data obtained, based on the processing of measurement results, which showed that even with such data, obtained results favor the normal neutrino mass hierarchy. As for the individual neutrino mass calculated in this paper, in today’s neutrino physics it is only known that neutrino mass scale is bounded only from above, and both the Dirac and the Majorana character of neutrinos are compatible with all observations. Among some of the questions resolved in this paper, which are related to the properties of neutrinos, a positive answer was also given to the question of whether light neutrinos are self-conjugate particles or not. 展开更多
关键词 special Relativity LEPTONS ordinary Neutrino Neutrino Mass and Mixing PMNS Matrix Jarlskog Invariant Majorana Mass
下载PDF
On the Unit of Translation
4
作者 张曼 《海外英语》 2013年第11X期176-177,182,共3页
The unit of translation has been the focus of debate through the history of translation. Barkhudarov suggests six levels of UT, each level could serve as unit of different levels of translation. Many Chinese translato... The unit of translation has been the focus of debate through the history of translation. Barkhudarov suggests six levels of UT, each level could serve as unit of different levels of translation. Many Chinese translators also expressed their opinions on this issue, but there is no settled answer yet. This paper tends to make a distinction between different texts: ordinary and special. Ordinary ones can adopt the UT of paragraph, while special ones should adopt special UTs according to their own characteristics. 展开更多
关键词 UNIT of TRANSLATION (UT) ordinary TYPES of TEXTS s
下载PDF
From Nikolay Umov E=kmc^(2) via Albert Einstein’s E=γmc^(2) to the Dark Energy Density of the Cosmos E=(21 22)mc^(2)
5
作者 Mohamed S.El Naschie 《World Journal of Mechanics》 2018年第4期73-81,共9页
The paper starts from the remarkable classical equation of the great nineteenth century Russian physicist Nikolay Umov E=kmc2 where 1/2&le;k&le;1, m is the mass, c is the speed of light and E is the equivalent... The paper starts from the remarkable classical equation of the great nineteenth century Russian physicist Nikolay Umov E=kmc2 where 1/2&le;k&le;1, m is the mass, c is the speed of light and E is the equivalent energy of m. After a short but deep discussion of the derivation of Umov we move to Einstein’s formula E=&gamma;mc2?where &gamma;is the Lorentz factor of special relativity and point out the interesting difference and similarity between Umov’s k and Lorentz-Einstein &gamma;. This is particularly considered in depth for the special case which leads to the famous equation?E=mc2?that is interpreted here to be the maximal cosmic energy density possible. Subsequently we discuss the dissection of E=mc2 into two components, namely the cosmic dark energy density E(D)=(21/22)MC2 and the ordinary energy density E(O)=MC2/22? where?E(D)+E(O)=MC2. Finally we move from this to the three-part dissection where we show that E is simply the sum of pure dark energy E(PD) plus dark matter energy E(DM) as well as ordinary energy E(O). 展开更多
关键词 N.Umov Energy A.Einstein Energy El Naschie Energy ordinary Cosmic Energy Cosmic Dark Energy F.Hasenohrl’s Electromagnetic Energy H.Poincaré History of special Relativity
下载PDF
On the Real Einstein Beauty E = Kmc2 被引量:1
6
作者 A. J. Babchin M. S. El Naschie 《World Journal of Condensed Matter Physics》 CAS 2016年第1期1-6,共6页
The paper suggests that E = mc<sup>2</sup> may be open to misinterpretation and that in this form it is not what Einstein advanced first. It is further suggested to return to the slightly less compact form... The paper suggests that E = mc<sup>2</sup> may be open to misinterpretation and that in this form it is not what Einstein advanced first. It is further suggested to return to the slightly less compact formula E = Kmc<sup>2</sup> where a < K < 1 which has the merit of accounting for the measured ordinary energy density of the cosmos (K = 1/22) and the conjectured missing dark energy density of the universe (K = 21/22) from the view point of economical notation. 展开更多
关键词 special Relativity Nuclear Physics Quantum Relativity Quantum Entanglement E = Kmc2 Dark Energy ordinary Energy Pair Annihilation Pair Creation Dvoretzky’s theorem Bohm Guiding Wave
下载PDF
DIFFERENTIATOR SERIES SOLUTION OF LINEAR DIFFERENTIAL ORDINARY EQUATION
7
作者 柯红路 谢和熙 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1999年第8期59-66,共8页
In this paper, the principle techinique of the differentiator method, and some examples using the method to obtain the general solution and special solution of the differential equation are introduced. The essential d... In this paper, the principle techinique of the differentiator method, and some examples using the method to obtain the general solution and special solution of the differential equation are introduced. The essential difference between this method and the others is that by this method special and general solutions can be obtained directly with the operations of the differentor in the differential equation and without the enlightenment of other scientific knowledge. 展开更多
关键词 linear ordinary differential equation differentiator series method special solution general solution
下载PDF
高职汽车专业群“产教联动、链群对接、岗课融通、专创结合”人才培养体系研究
8
作者 张国豪 沈先飞 王群 《襄阳职业技术学院学报》 2024年第5期57-61,共5页
汽车产业是我国的支柱产业,汽车产业的发展壮大离不开创新型技术技能人才的强大支撑。作为地方高职院校,技术技能人才培养需要解决以下问题:人才培养规格不能满足汽车产业转型升级的需求;学生实践能力不能满足汽车生产岗位的需求;学生... 汽车产业是我国的支柱产业,汽车产业的发展壮大离不开创新型技术技能人才的强大支撑。作为地方高职院校,技术技能人才培养需要解决以下问题:人才培养规格不能满足汽车产业转型升级的需求;学生实践能力不能满足汽车生产岗位的需求;学生创新水平跟不上企业创新的脚步。针对以上问题,襄阳职业技术学院立足服务湖北省51020现代产业体系和襄阳144产业集群的汽车产业,通过链群对接,组建汽车专业群,提出了“产教联动、链群对接、岗课融通、专创结合”的人才培养体系。近十年来,学校坚持产教融合的办学理念,专业群与产业链对接,教学内容与岗位典型工作任务融通,专业教育与创新创业教育结合,为地方汽车产业培养了大量岗位适应性强、实践能力强、创新水平高的汽车工匠,支撑了襄阳乃至湖北汽车产业的高质量发展。 展开更多
关键词 产教联动 链群对接 岗课融通 专创结合 人才培养体系
下载PDF
Struggling:Living Conditions of Ordinary Civil Servants of Tianjin Special Municipality during the Period of the Japanese Occupation
9
作者 Li Jinzheng Ren Liping Fang Yu 《Frontiers of History in China》 2020年第3期435-481,共47页
During the period of the Japanese occupation,ordinary civil servants were the main force keeping the puppet municipal government of Tianjin functioning.In the first years of the occupation,the puppet municipal governm... During the period of the Japanese occupation,ordinary civil servants were the main force keeping the puppet municipal government of Tianjin functioning.In the first years of the occupation,the puppet municipal government mainly hired former civil servants who had served under the Nanjing National Government.After the situation was stable,the puppet municipal government also recruited civil servants by civil service examinations.The ranks of civil servants and the rules and regulations they observed were basically the same as those of the former National Government.Most ordinary civil servants came from the Beijing-Tianjin-Hebei region,and were relatively young and well educated.They mainly relied on their salaries for their livelihood.For the first three years of the Japanese occupation they lived comfortably,because of their relatively high and stable incomes and the slow rate of inflation.After that,inflation soared,but their salaries did not increase correspondingly,therefore the living conditions of civil servants declined constantly.The Japanese puppet government exercised strict control over civil servants,physically and psychologically,and forced them to receive enslaving education.In short,they were in a distorted and struggling state both in their material life and their spiritual world. 展开更多
关键词 Japanese-occupied areas Tianjin special Municipality ordinary civil servants
原文传递
SOADDOF训练法对提高网球比赛预判力的作用
10
作者 何文盛 徐莲 +2 位作者 许益芳 张君梅 董蕊 《浙江师范大学学报(自然科学版)》 CAS 2015年第2期226-231,共6页
在深入分析网球运动技战术特点的基础上,从运动员预判力的影响因素(搜寻、观察、分析、讨论、设计、操作和反馈等)方面制定出网球预判力专项训练法,检验了不同训练模式对提高预判力的效果.通过比较专项训练组和非专项训练组的训练效果,... 在深入分析网球运动技战术特点的基础上,从运动员预判力的影响因素(搜寻、观察、分析、讨论、设计、操作和反馈等)方面制定出网球预判力专项训练法,检验了不同训练模式对提高预判力的效果.通过比较专项训练组和非专项训练组的训练效果,得出如下结论:1)训练可以提高预判能力,在正确率、漏失率、预判时间和稳定性这4个指标上的训练效果显著.2)所有训练方法都能提高运动员的预判能力,但不同训练方法在提高预判力的作用机制上有所不同.预判力专项训练是通过提高正确率,减少预判时间,降低错误率,同时减少漏失率实现预判力的提高.3)通过对男女运动员的比较,发现在预判的正确率、漏失率、稳定性上差异显著.结论:在有限的时间资源里,提高预判正确性,降低犯错的概率,减少预判反应时间,同时减少无法作出判断的次数,是训练与提高预判力的重要途径.SOADDOF训练法比非专项预判力训练对提高网球运动员预判力有更好的训练效果. 展开更多
关键词 网球运动员 预判力 专项训练 非专项训练 训练效果
下载PDF
“一校两点,普特协同”的乡村残疾儿童融合安置模式探究
11
作者 赵斌 陈鸿宇 +2 位作者 刘静静 杨晖 周贤银 《现代特殊教育》 2024年第18期45-51,共7页
乡村融合教育是融合教育的重点和难点。为妥善安置乡村地区适龄残疾儿童青少年接受教育,A县于2018年因地制宜地提出并实践以特殊教育学校、地方教育委员会、普通学校及家长为实施主体的“一校两点”乡村融合教育安置模式,取得了一定成... 乡村融合教育是融合教育的重点和难点。为妥善安置乡村地区适龄残疾儿童青少年接受教育,A县于2018年因地制宜地提出并实践以特殊教育学校、地方教育委员会、普通学校及家长为实施主体的“一校两点”乡村融合教育安置模式,取得了一定成效。未来“一校两点”融合教育安置模式仍需进一步优化,形成以普特协同机制为内核的乡村融合教育发展新路径。 展开更多
关键词 乡村残疾儿童 融合教育 一校两点 普特协同
下载PDF
学校反兴奋剂教育的实践检视与制度协同—基于2024年部分高考应届生的实证研究
12
作者 李茵晖 黎浩田 章晓菲 《上海体育大学学报》 北大核心 2024年第10期73-82,共10页
随着《反兴奋剂条例(修订草案)》的发布,反兴奋剂教育与部门协同的重要性愈发凸显。通过行为理论构建分析框架,探讨学生在反兴奋剂教育行为动机上的差异,并以部分2024年高考应届生为样本进行问卷调查,实证分析学生反兴奋剂知识水平的影... 随着《反兴奋剂条例(修订草案)》的发布,反兴奋剂教育与部门协同的重要性愈发凸显。通过行为理论构建分析框架,探讨学生在反兴奋剂教育行为动机上的差异,并以部分2024年高考应届生为样本进行问卷调查,实证分析学生反兴奋剂知识水平的影响因素。发现,学生对兴奋剂检查的认知与其知识水平呈正相关,且体育专项考试学生虽在知识水平上优于普通考生,但整体差距不大且未达到及格线,这揭示出学校反兴奋剂教育在制度协同方面仍面临困境。对此,急需通过以下3个方面的制度协同完善反兴奋剂教育的规范体系:①与配套制度的协同,确保教育活动与兴奋剂检查、调查等制度形成有效衔接,以增强教育的实践性和执行力;②与考试制度的协同,将反兴奋剂知识的考核纳入体育专项考试内容,以提升学生对反兴奋剂重要性的认识和知识的掌握;③与教学制度的协同,将反兴奋剂教育融入教学大纲和课程设置,通过课堂教学、讲座和拓展活动等形式提高教育的系统性和实效性。 展开更多
关键词 反兴奋剂教育 体育专项考试 制度协同 高考应届生
下载PDF
芯片制造用含氟电子特气的研究进展
13
作者 张呈平 权恒道 《精细化工》 EI CAS CSCD 北大核心 2024年第2期330-340,390,共12页
含氟电子特气主要用于芯片制造过程中的刻蚀和清洁工段,是不可或缺的关键性化工材料。该文比较了传统含氟电子特气和新型含氟电子特气,重点总结了新型含氟电子特气的主要合成路线,并指出最佳的产业化路线;介绍了芯片制造用含氟电子特气... 含氟电子特气主要用于芯片制造过程中的刻蚀和清洁工段,是不可或缺的关键性化工材料。该文比较了传统含氟电子特气和新型含氟电子特气,重点总结了新型含氟电子特气的主要合成路线,并指出最佳的产业化路线;介绍了芯片制造用含氟电子特气的发展现状;最后,针对当前含氟电子特气的主要知识产权被国外发达国家所垄断,且刻蚀和清洁工序的分步操作导致工序繁复且效率低下,难以满足高端芯片集成度和良品率等更高的精度需求问题,提出今后研究应开发满足国家重大战略需求的新一代含氟电子特气,具备刻蚀/清洁协同双功能,具有简化工序、提高效率、提升芯片制造良品率的优点,实现对当前刻蚀和清洁仅能分步操作的含氟电子特气的理想替代。 展开更多
关键词 电子特气 刻蚀 清洁 芯片制造 高端芯片 先进制程 刻蚀/清洁协同
下载PDF
普通幼儿园特殊幼儿的在园生存现状──基于A市39所普通幼儿园的调查数据分析
14
作者 张银花 吴晓蕾 宁亚飞 《宁波教育学院学报》 2024年第1期20-24,共5页
以A市39所普通幼儿园的106名主班教师为研究对象,研究者采用问卷调查的方法考察普通幼儿园中特殊幼儿的在园生存现状。研究显示:特殊幼儿在普通幼儿园中接受教育的比例相对较低;特殊幼儿对各类活动的参与度不高,教师和普通幼儿间的互动... 以A市39所普通幼儿园的106名主班教师为研究对象,研究者采用问卷调查的方法考察普通幼儿园中特殊幼儿的在园生存现状。研究显示:特殊幼儿在普通幼儿园中接受教育的比例相对较低;特殊幼儿对各类活动的参与度不高,教师和普通幼儿间的互动有限;教师对学前融合教育的认识和实施能力有待持续提升。改善特殊幼儿在普通幼儿园的生存现状,需要建立从出生至入学的完备的筛查诊断体系,提高特殊幼儿的入园率,促进特殊幼儿的早发现、早干预;加强学前教育专业师范生的职前培训和幼儿园教师的职后培训;依托特殊教育资源中心建设和资源教室建设,为特殊幼儿提供专业的教育训练,为其家庭提供专业的咨询服务。 展开更多
关键词 普通幼儿园 特殊幼儿 学前融合教育
下载PDF
普通高校特殊体育“走课制”教育模式的探索与实践研究
15
作者 傅亮 翁兴和 黄惠玲 《体育科技文献通报》 2024年第9期166-168,103,共4页
普通高校特殊体育教育群体数量的日益增多成为高校体育工作不可忽视的问题。本文采用文献资料法、访谈法、实地调研法、逻辑分析法等研究方法,基于普通高校特殊体育教育概念及对当前普通高校特殊体育教育的开课形式、教学内容和存在问... 普通高校特殊体育教育群体数量的日益增多成为高校体育工作不可忽视的问题。本文采用文献资料法、访谈法、实地调研法、逻辑分析法等研究方法,基于普通高校特殊体育教育概念及对当前普通高校特殊体育教育的开课形式、教学内容和存在问题进行梳理,从体育在特殊教育中的价值、高校特殊群体的体育需求及高校特殊群体参与体育的影响因素3个方面分析了普通高校特殊体育教育“走课制”教育模式的设计背景,提出了特殊体育教育“走课制”教育模式,并从兴趣、简化、科学及弹性4个维度探讨了特殊体育教育“走课制”教育模式的设计,最后提出了从普通高校特殊体育教育“走课制”教学项目及内容的模块化、线上平台的搭建和考核办法的创新等方面的实施路径建议。 展开更多
关键词 特殊体育教育 走课制 普通高校 探索 实践
下载PDF
江西安远客家方言后附缀研究——以“来”“个”“时”等为例
16
作者 叶源辉 《红河学院学报》 2024年第4期88-93,共6页
文章通过考察江西安远客家方言中的各类后附缀,发现特殊附缀与语音宿主的结合较之普通附缀更为紧密,集中表现为:其声调随前字声调的变化而变化,且变调模式具有高度一致性。基于此,文章提出了“实义词>语法词/普通附缀/特殊附缀>... 文章通过考察江西安远客家方言中的各类后附缀,发现特殊附缀与语音宿主的结合较之普通附缀更为紧密,集中表现为:其声调随前字声调的变化而变化,且变调模式具有高度一致性。基于此,文章提出了“实义词>语法词/普通附缀/特殊附缀>词内成分/零形式”的语法化路径,以期为汉语附缀的发展演变提供一个新视角。 展开更多
关键词 安远客家方言 后附缀 特殊附缀 普通附缀 语法化路径
下载PDF
我国普通高校病残弱等特殊体质学生体育教育研究
17
作者 秦泽浩 《当代体育科技》 2024年第16期69-72,共4页
在普通高校体育教育领域中,有较少一部分学生属于体育弱势群体,这一群体又被称为特殊体质学生。该文采用文献资料法、逻辑分析法、访谈法等方法,分析了我国普通高校病残弱等特殊体质学生与接受特殊教育学生的区别,探讨了前者体育课程的... 在普通高校体育教育领域中,有较少一部分学生属于体育弱势群体,这一群体又被称为特殊体质学生。该文采用文献资料法、逻辑分析法、访谈法等方法,分析了我国普通高校病残弱等特殊体质学生与接受特殊教育学生的区别,探讨了前者体育课程的发展历程、开展现状、发展阻力及解决途径。 展开更多
关键词 普通高校 病残弱等 特殊体质学生 体育教育
下载PDF
Q235和Q345材料的异型管弯曲成型质量的仿真研究
18
作者 王翠竹 潘发兴 《模具技术》 2024年第1期71-79,共9页
由于管坯不同材料的力学特性的差异、热硬化指数、厚向异性系数以及延伸率都不同,使得不同强度钢材在弯曲成型过程中出现各种质量问题。为判断不同材料下不同截面大小的异型管弯曲不同角度成型时对管坯质量的影响,建立了Q235和Q345两种... 由于管坯不同材料的力学特性的差异、热硬化指数、厚向异性系数以及延伸率都不同,使得不同强度钢材在弯曲成型过程中出现各种质量问题。为判断不同材料下不同截面大小的异型管弯曲不同角度成型时对管坯质量的影响,建立了Q235和Q345两种材料弯曲30°~90°的12种工况下的有限元模型。研究结果表明:同一截面尺寸的不同材料,对管坯中面高度缩减率和壁厚减薄率影响规律一致;不同截面尺寸大小的同一材料,其最大中面高度缩减率和最大壁厚减薄率数据相差甚大;临界弯曲角度为60°,超出临界弯曲角度,管坯截面尺寸小且大角度弯曲时,其最大壁厚减薄率呈急速加大趋势,此时严重影响管坯成型质量。 展开更多
关键词 普通碳素结构钢 低合金高强钢 绕弯成型 异型管 有限元模拟
下载PDF
常数变易法教学研究
19
作者 旷雨阳 李兴华 王太荣 《杨凌职业技术学院学报》 2023年第2期15-19,共5页
常数变易法是解常微分方程行之有效的一种方法,它是拉格朗日十一年的研究成果,是一种特殊的变量代换法。本文对常数变易法在求解一阶线性微分方程、高阶线性微分方程及其线性微分方程组进行相关研究,探讨出常数变易法在求解各类微分方... 常数变易法是解常微分方程行之有效的一种方法,它是拉格朗日十一年的研究成果,是一种特殊的变量代换法。本文对常数变易法在求解一阶线性微分方程、高阶线性微分方程及其线性微分方程组进行相关研究,探讨出常数变易法在求解各类微分方程过程中的共同特点,从而揭示了常数变易法解题实质内涵,得出了常数变易法教学总结,概括了常数变易法解题的一般结论。 展开更多
关键词 常微分方程 常数变易法 通解 特解 基解矩阵 教学研究
下载PDF
普通高校跆拳道竞技队体能训练现状分析--以三峡大学为例 被引量:2
20
作者 唐庆彪 吴琼 《当代体育科技》 2023年第28期47-50,共4页
随着跆拳道竞赛规则的不断修改,对抗越来越激烈,这对跆拳道运动员的体能储备要求也越来越高。因此,针对基础较为薄弱的普通高校跆拳道运动员,加强体能训练,提高训练效率有着重要意义。该文利用文献资料分析法、访问法、问卷调查法和数... 随着跆拳道竞赛规则的不断修改,对抗越来越激烈,这对跆拳道运动员的体能储备要求也越来越高。因此,针对基础较为薄弱的普通高校跆拳道运动员,加强体能训练,提高训练效率有着重要意义。该文利用文献资料分析法、访问法、问卷调查法和数理统计法等研究方法,对三峡大学跆拳道队体能训练的现状和问题进行分析研究。研究发现,跆拳道运动员常因对体能训练的认知不全、训练方法及手段单一等问题而出现训练效果不佳、训练恢复慢易受伤等现象。该文针对以上问题进行总结,并提出了相对应的解决措施,期望为今后普通高校跆拳道竞技队开展体能训练提供一定的参考。 展开更多
关键词 普通高校 跆拳道竞技队 体能训练 专项体能
下载PDF
上一页 1 2 8 下一页 到第
使用帮助 返回顶部