期刊文献+

二次检索

题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到5,248篇文章
< 1 2 250 >
每页显示 20 50 100
从C.P.E.巴赫的音乐中探寻情感的表现 被引量:3
1
作者 陈家贝 《当代音乐》 2015年第5期105-106,共2页
早在18世纪,作曲家C.P.E.巴赫就在他著名的文献《键盘乐器演奏艺术真谛》中阐述了用纯乐器音乐手法来表现情感,这样的音乐被认为是"感情的语言"。作为一名演奏者,我们从他的思想中进一步剖析和拓展,在演奏的同时力求对作品精... 早在18世纪,作曲家C.P.E.巴赫就在他著名的文献《键盘乐器演奏艺术真谛》中阐述了用纯乐器音乐手法来表现情感,这样的音乐被认为是"感情的语言"。作为一名演奏者,我们从他的思想中进一步剖析和拓展,在演奏的同时力求对作品精神、情感全面地展现。 展开更多
关键词 C.P.E.巴赫 键盘乐器演奏 情感风格
下载PDF
Introduction of Internet P.E News Reporter
2
作者 王丽娜 王麟 《科技视界》 2013年第15期18-18,共1页
Consistent with previous research, results showed men get more paragraphs and photography coverage. Interestingly, women's factual information is always associated with relevant men report, including P.E relevant ... Consistent with previous research, results showed men get more paragraphs and photography coverage. Interestingly, women's factual information is always associated with relevant men report, including P.E relevant with personal information. 展开更多
关键词 P E NEWS INTERNET P E INTRODUCTION
下载PDF
Development Characteristics of Private P.E Economy
3
作者 王丽娜 王麟 《科技视界》 2013年第13期30-30,共1页
The regional policy in the innovation development of private P.E economy plays better role in management according to law,guidance and escort;increase the macro quality of main body of private P.E entrepreneurs and th... The regional policy in the innovation development of private P.E economy plays better role in management according to law,guidance and escort;increase the macro quality of main body of private P.E entrepreneurs and the overall staff quality,develop P.E vocational P.E to provide P.E talents for private P.E economy. 展开更多
关键词 P E ECONOMY Leap DEVELOPMENT CHARACTERISTICS
下载PDF
P.E Science J ournals General Influence Factor
4
作者 王丽娜 王麟 《科技视界》 2013年第14期17-17,共1页
The portal is characterized with large amount of information, high stability and interaction, while "Online Journal of Physical P.E" is to publicize the academic pure value, spread the achievement influence ... The portal is characterized with large amount of information, high stability and interaction, while "Online Journal of Physical P.E" is to publicize the academic pure value, spread the achievement influence in daily life, and advocate an academic atmosphere of utilitarianism with a slogan of "article issued online can be published in journal with the recommendation of experts" and practical action. It is the first academic journal under network operation. 展开更多
关键词 P E SCIENCE JOURNALS InInfluence FACTOR
下载PDF
针刺联合核心稳定训练对颈椎病颈痛患者中医症候积分、颈痛程度、生活质量和炎症因子水平的影响
5
作者 许华峰 周伶 +1 位作者 付军杰 隆豫 《检验医学与临床》 2025年第2期242-246,共5页
目的评价针刺联合核心稳定训练对颈椎病颈痛患者中医症候积分、颈痛程度、生活质量和炎症因子水平的影响。方法将2023年1-12月丰都县人民医院收治的80例颈椎病颈痛患者分为对照组(40例)和观察组(40例),对照组予以针刺治疗,观察组予以针... 目的评价针刺联合核心稳定训练对颈椎病颈痛患者中医症候积分、颈痛程度、生活质量和炎症因子水平的影响。方法将2023年1-12月丰都县人民医院收治的80例颈椎病颈痛患者分为对照组(40例)和观察组(40例),对照组予以针刺治疗,观察组予以针刺联合核心稳定训练治疗。比较治疗前后两组中医症候积分(颈肩部疼痛、颈部压痛、头晕、颈部活动受限、肢端麻木疼痛)、颈痛程度、生活质量和炎症因子水平。结果治疗后,两组颈肩部疼痛、颈部压痛、头晕、颈部活动受限、肢端麻木疼痛症状评分均低于治疗前(P<0.05),且治疗后观察组颈肩部疼痛、颈部压痛、头晕、颈部活动受限、肢端麻木疼痛症状评分均低于对照组(P<0.05)。治疗后,两组Northwick Park颈痛量表(NPQ)评分均较治疗前降低(P<0.05),且治疗后观察组NPQ评分低于对照组(P<0.05)。治疗后,两组汉化版简明健康调查量表(SF-36)各维度评分均高于治疗前(P<0.05),且治疗后观察组SF-36各维度评分高于对照组(P<0.05)。治疗后,两组血清白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)、前列腺素E2(PGE2)、P物质(SP)水平均较治疗前降低(P<0.05),且治疗后观察组血清IL-6、TNF-α、PGE2、SP水平低于对照组(P<0.05)。结论针刺联合核心稳定训练治疗可有效改善颈椎病颈痛患者的各项中医症候积分,缓解颈痛程度,减轻炎症反应,提高其生活质量。 展开更多
关键词 颈椎病 颈痛 针刺 核心稳定训练 中医症候积分 白细胞介素 肿瘤坏死因子-α 前列腺素E2 P物质
下载PDF
蒙特威尔第“激动风格”和C.P.E.巴赫“激情风格”之比较
6
作者 吴琼 《艺术评鉴》 2019年第10期1-2,共2页
本文选取了文艺复兴晚期和前古典主义时期的两位代表作曲家的创作风格,以作曲家所处的时代背景为依托着重阐述两种不同时代音乐风格的异同,力从对比中着眼看待其对西方音乐发展的影响。
关键词 文艺复兴晚期 前古典主义时期 蒙特威尔第 “激动风格” C.P.E.巴赫 “激情风格”
下载PDF
一部永不休止的流动经典——C.P.E巴赫与他的《钢琴弹奏艺术》 被引量:1
7
作者 张强 《南京艺术学院学报(音乐与表演版)》 2002年第4期37-38,59,共3页
C.P.E.巴赫是“北德乐派”的代表作曲家。作为一个伟大的音乐家,他不仅继承和发展了其父约翰·塞巴斯蒂安·巴赫的音乐创作风格,而且教出了象贝多芬这样的一代钢琴大师。作为一个伟大的作曲家,音乐史上已有记载,而他在钢琴教学... C.P.E.巴赫是“北德乐派”的代表作曲家。作为一个伟大的音乐家,他不仅继承和发展了其父约翰·塞巴斯蒂安·巴赫的音乐创作风格,而且教出了象贝多芬这样的一代钢琴大师。作为一个伟大的作曲家,音乐史上已有记载,而他在钢琴教学上的伟大成就至今少有记述。本文着重研究他在钢琴教学上的贡献。 展开更多
关键词 C.P.E巴雷 《钢琴弹奏艺术》 音乐家
下载PDF
High Pressure Treatment Changes Spoilage Characteristics and Shelf Life of Pacific Oysters(Crassostrea gigas)During Refrigerated Storage 被引量:4
8
作者 CAO Rong ZHAO Ling LIU Qi 《Journal of Ocean University of China》 SCIE CAS CSCD 2017年第2期351-355,共5页
The effects of high pressure(HP) treatment on spoilage characteristic and shelf life extension of Pacific oysters(Crassostrea gigas) during refrigerated storage were studied.Results showed that HP treatment of 275 MPa... The effects of high pressure(HP) treatment on spoilage characteristic and shelf life extension of Pacific oysters(Crassostrea gigas) during refrigerated storage were studied.Results showed that HP treatment of 275 MPa for 3 min or 300 MPa for 2 min could achieve 100% full release of oyster adductor muscle,pressures higher than 350 MPa caused excessive release as the shells of oysters were broken,thus use of higher pressures should be cautious in oyster processing industry because of its adverse impact on the appearance of shells.HP treatment(300 MPa,2 min) was proper for the shucking of Pacific oyster(Crassostrea gigas) in China.This treatment caused no organoleptic disadvantage.Moreover,HP treatment resulted in obvious differences in biochemical spoilage indicators(p H,TVB-N and TBARS) changes and volatile compounds profile determined by electronic nose during storage.HP treatment(300 MPa,2 min) also led to a reduction of aerobic bacterial count(APC) by 1.27 log cycles.Furthermore,the APC values of oysters treated by HP were always lower than those of the control samples during storage.Based on the organoleptic,biochemical and microbiological indicators,shelf life of 6-8 d for control and 12 d for HP-treated oysters could be expected.HP treatment showed great potential in oyster processing and preservation. 展开更多
关键词 high pressure processing OYSTER SPOILAGE E-NOSE SHELF life
下载PDF
NAND flash service lifetime estimate with recovery effect and retention time relaxation 被引量:1
9
作者 步凯 陈怡然 +2 位作者 徐晖 易伟 谢启友 《Journal of Central South University》 SCIE EI CAS 2014年第8期3205-3213,共9页
A service life model of NAND flash and threshold voltage shift process is proposed to calculate the service life and endurance.The relationships among achievable program/erase(P/E) cycles,recovery time,bad block rate ... A service life model of NAND flash and threshold voltage shift process is proposed to calculate the service life and endurance.The relationships among achievable program/erase(P/E) cycles,recovery time,bad block rate and storage time are analyzed.The achievable endurance and service life of a NAND flash are evaluated based on a flash cell degradation and recovery model by varying recovery time,badblock rate,and storage time.It is proposed to improve the service lifetime of solid state disk by both relaxing the bad block rate limitation and retention time while extending the recovery time.The results indicate that endurance can be improved by 17 times if the storage time guarantee is reduced from 10 a to 1 a with 105 s recovery time inserted between cycles. 展开更多
关键词 NAND flash ENDURANCE RETENTION recovery effect program/erase (P/E) cycle
下载PDF
TGF-β2-induced NEAT1 regulates lens epithelial cell proliferation,migration and EMT by the miR-26a-5p/FANCE axis 被引量:2
10
作者 Xiao-Hui Yu Shao-Yi Liu Cheng-Fang Li 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2021年第11期1674-1682,共9页
AIM:To explore the regulatory mechanism of nuclear paraspeckle assembly transcript 1(NEAT1)in the pathogenesis of posterior capsule opacification(PCO).METHODS:Quantitative reverse transcription polymerase chain reacti... AIM:To explore the regulatory mechanism of nuclear paraspeckle assembly transcript 1(NEAT1)in the pathogenesis of posterior capsule opacification(PCO).METHODS:Quantitative reverse transcription polymerase chain reaction(RT-q PCR)was executed to analyze NEAT1 and micro RNA(miR)-26a-5p expression in transforming growth factor-beta 2(TGF-β2)-disposed lens epithelial cells(LECs).The proliferation,cell cycle progression,apoptosis,and migration of TGF-β2-disposed LECs were evaluated.The relationship between NEAT1 or fanconi anemia(FA)complementation group E(FANCE)and miR-26a-5p was verified by dual-luciferase reporter assay.RESULTS:TGF-β2 induced NEAT1 expression in LECs.NEAT1 inhibition accelerated apoptosis,cell cycle arrest,decreased proliferation,epithelial-mesenchymal transition(EMT),and migration of TGF-β2-disposed LECs.NEAT1 sponged miR-26a-5p to further regulate FANCE expression.Rescue experiments presented that miR-26a-5p downregulation overturned NEAT1 silencing-mediated impacts on TGF-β2-disposed LEC biological behaviors.Additionally,FANCE overexpression reversed miR-26a-5p mimic-mediated impacts on TGF-β2-disposed LEC biological behaviors.CONCLUSION:TGF-β2-induced NEAT1 facilitates LEC proliferation,migration,and EMT by upregulating FANCE via sequestering miR-26a-5p. 展开更多
关键词 posterior capsule opacification transforming growth factor-beta 2 nuclear paraspeckle assembly transcript 1 miRNA-26a-5p fanconi anemia complementation group E
下载PDF
LIFE CYCLE AND PRODUCTION OF CHIRONOMIDAE(DIPTERA) IN BIANDANTANG, A TYPICAL MACROPHYTIC LAKE (HUBEI, CHINA)
11
作者 阎云君 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2000年第3期221-226,共6页
The life cycle and annual production of four dominant species of Chironomids ( Chironomus plumosus, Chironomus sp., Clinotanypus sp., Tokunagayusurika akamusi) were studied with samples taken monthly in Biandantang La... The life cycle and annual production of four dominant species of Chironomids ( Chironomus plumosus, Chironomus sp., Clinotanypus sp., Tokunagayusurika akamusi) were studied with samples taken monthly in Biandantang Lake at eight stations from April, 1996 to March, 1997. Instar frequency data showed C. plumosus was univoltine, while the other three were bivoltine. Production in wet weight (g/(m 2·a)) calculated by the size frequency method for each species were: C. plumosus, 2.663 ; Chironomus sp.,1.161 ;Clinotanypus sp., 0.270; T. akamusi , 1.476. Based on the mean standing stock, their P/B ratios were 3.2, 4.0, 6.2 and 4.4, respectively. 展开更多
关键词 DIPTERA CHIRONOMIDAE life cycle PRODUCTION P/B ratio size frequency method Biandantang LAKE
下载PDF
论C.P.E巴赫的三部歌曲集创作 被引量:1
12
作者 陈海 《歌海》 2019年第5期41-51,共11页
C.P.E巴赫(Carl Philipp Emanuel Bach,1714~1788)上承巴洛克时代下启古典主义风格,无论在古钢琴奏鸣曲还是交响曲等体裁的创作上,都无疑是位举足轻重的人物。他作为柏林歌曲乐派的代表人物,一生创作了近300首德文歌曲,奠定了18世纪德... C.P.E巴赫(Carl Philipp Emanuel Bach,1714~1788)上承巴洛克时代下启古典主义风格,无论在古钢琴奏鸣曲还是交响曲等体裁的创作上,都无疑是位举足轻重的人物。他作为柏林歌曲乐派的代表人物,一生创作了近300首德文歌曲,奠定了18世纪德文歌曲写作手法,并推动了19世纪艺术歌曲的发展。以其一生的三部大型歌曲集为叙述重点,论述其德文歌曲创作的几个阶段,分析其歌曲特点,进而阐释与探析18世纪德文歌曲的写作风格。 展开更多
关键词 C.P.E巴赫 德文歌曲 风格特征 柏林歌曲乐派
下载PDF
Decision-making of biomass ethanol fuel policy based on life cycle 3E assessment
13
作者 冷如波 戴杜 +1 位作者 陈晓军 王成焘 《Journal of Central South University》 SCIE EI CAS 2005年第S2期59-64,共6页
To evaluate the environmental, economic, energy performance of biomass ethanol fuel in China and to support the decision-making of biomass ethanol energy policy, an assessment method of life cycle 3E (economy, environ... To evaluate the environmental, economic, energy performance of biomass ethanol fuel in China and to support the decision-making of biomass ethanol energy policy, an assessment method of life cycle 3E (economy, environment, energy) was applied to the three biomass ethanol fuel cycle alternatives, which includes cassava-based, corn-based and wheat-based ethanol fuel. The assessments provide a comparison of the economical performance, energy efficiency and environmental impacts of the three alternatives. And the development potential of the three alternatives in China was examined. The results are very useful for the Chinese government to make decisions on the biomass ethanol energy policy, and some advises for the decision-making of Chinese government were given. 展开更多
关键词 life CYCLE 3E ASSESSMENT DECISION-MAKING BIOMASS fuel ETHANOL
下载PDF
Into the life and death: RecA a WISE factor working to integrate survival and evolution in <i>Escherichia coli</i>
14
作者 José María Gómez Gómez 《Advances in Bioscience and Biotechnology》 2013年第3期442-449,共8页
Escherichia coli RecA has been considered traditionally a cellular protein with multiple vital functions working to ensure the maintenance of integrity of genome in each individual bacterial cell as well as promoting ... Escherichia coli RecA has been considered traditionally a cellular protein with multiple vital functions working to ensure the maintenance of integrity of genome in each individual bacterial cell as well as promoting swarming migration in collectivity. On the contrary, recently it has been described that RecA promotes cellular apoptotic-like death (ALD), a pathway of programmed cellular death (PCD). In fact, RecA has been dubbed as the major apoptotic executor in E. coli. From these studies, RecA emerges as a prototypical Gin/Gan protein that despite of their intrinsic vital and lethal anfi-funcionality becomes in a WISE factor: a Worker to Integrate Survival and Evolution in E. coli evolving populations living in community. Here, I provide a review of recent experimental and conceptual advances trying to understand these RecA’s antagonistic roles in appearance contradictory under a unified biological vision. 展开更多
关键词 Life & DEATH E. coli RECA RECA Nucleofilament RECA RECA Anfi-Funcionality SOS Response Apoptosis-Like DEATH Swarming Motility MULTICELLULARITY Sociability Cheaters Cooperation WISE FACTOR
下载PDF
P. fluorescens and B. megaterium Effect on the Lifespan of Mutant-Type dpy-11 and Wild-Type of C. elegans
15
作者 Rachel Ross 《CellBio》 2022年第1期1-9,共9页
The research question being studied in this paper is how do different types of bacteria as food (Pseudomonas fluorescens and Bacillus megaterium) affect the lifespan of Caenorhabditis elegans in dpy-11 mutant-type and... The research question being studied in this paper is how do different types of bacteria as food (Pseudomonas fluorescens and Bacillus megaterium) affect the lifespan of Caenorhabditis elegans in dpy-11 mutant-type and wild-type? P. fluorescens and B. megaterium will be the two pathogens that will be tested on two different types of C. elegans: mutant-type dpy-11 and wild-type. From the analysis of primary articles studying these pathogens, it can be concluded that P. fluorescens and B. megaterium are decent contenders for allowing C. elegans to grow and possibly extend the lifespan of it. P. fluorescens will allow the lifespan of the two types of nematodes to be longer. Additionally, the mu-tant-type dpy-11 of C. elegans will have a much longer lifespan, even double, compared to that of the wild-type. The results showed P. fluorescens had a longer lifespan than B. megaterium but not as long as C. elegans’ main food source, E. coli. C. elegans mutant dpy-11 had a longer lifespan than the wild-type. Furthermore, there were no C. elegans present in the B. megaterium wild-type plates. 展开更多
关键词 C. elegans P. fluorescens B. megaterium E. coli
下载PDF
清肾颗粒对大鼠NRK-52E细胞转分化模型miR-23b和PINK1/Parkin通路的影响 被引量:2
16
作者 金华 张叶青 +4 位作者 呼琴 张磊 陈诺 韩燕全 王亿平 《中国药理学通报》 CAS CSCD 北大核心 2024年第1期162-170,共9页
目的 探讨TGF-β1诱导大鼠NRK-52E细胞转分化模型中miR-23b对PINK1/Parkin通路的靶向调节机制,并阐明清肾颗粒含药血清对NRK-52E细胞转分化的干预机理。方法 采用超高效液相色谱(UPLC)指纹图谱法对清肾颗粒进行全指纹图谱分析。构建TGF-... 目的 探讨TGF-β1诱导大鼠NRK-52E细胞转分化模型中miR-23b对PINK1/Parkin通路的靶向调节机制,并阐明清肾颗粒含药血清对NRK-52E细胞转分化的干预机理。方法 采用超高效液相色谱(UPLC)指纹图谱法对清肾颗粒进行全指纹图谱分析。构建TGF-β1诱导大鼠NRK-52E细胞转分化模型,转染siRNA后分为模拟物空载对照组、miR-23b-5p模拟物组、抑制剂空载对照组、miR-23b-5p抑制剂组,观察miR-23b-5p对PINK1表达量的影响。再将NRK-52E细胞分组为正常组、TGF-β1组、清肾颗粒组、miR-23b-mimic-NC组、miR-23b-mimic组、miR-23b-mimic+清肾颗粒组,Western blot法检测NRK-52E细胞中Pink1、Parkin、LC3Ⅱ、Beclin-1、P62、α-SMA蛋白表达,RT-qPCR法检测NRK-52E细胞中miR-23b-5p、Pink1、Parkin、Beclin-1、α-SMA mRNA的表达,双荧光素酶报告基因实验检测miR-23b-5p与PINK1的靶向关系。结果 UPLC指纹图谱法鉴定出清肾颗粒中11个活性成分。miR-23b-5p过表达后,PINK1 mRNA表达量也显著增加(P<0.05);而miR-23b-5p表达沉默后,PINK1 mRNA表达量也显著减少(P<0.05)。双荧光素酶报告显示,Rno-miR-23b-5p能显著下调Rno-PINK1-WT荧光素酶活性(P<0.05),但未能下调突变Rno-PINK1-mut荧光素酶活性(P>0.05)。清肾颗粒含药血清干预实验发现,TGF-β1组的miR-23b-5p、Pink1、Parkin、Beclin-1、LC3Ⅱ表达及LC3Ⅱ/Ⅰ比值均明显低于正常组,P62和α-SMA表达明显高于正常组(P<0.05)。清肾颗粒组和miR-23b-mimic组的miR-23b-5p、Pink1、Parkin、Beclin-1、LC3Ⅱ表达及LC3Ⅱ/Ⅰ比值均明显高于TGF-β1组,P62和α-SMA表达明显低于TGF-β1组(P<0.05)。miR-23b-mimic+清肾颗粒组的表现更优于miR-23b-mimic组(P<0.05)。结论 清肾颗粒能够上调NRK-52E细胞内miR-23b-5p表达,并通过增强PINK1/Parkin通路介导的线粒体自噬活性,抑制NRK-52E细胞转分化进程。 展开更多
关键词 miR-23b-5p PINK1/Parkin信号通路 线粒体自噬 NRK-52E细胞 清肾颗粒 上皮细胞转分化
下载PDF
Research and Practice of the P.E. Information Teaching Design System
17
作者 Xi Jianping 《International English Education Research》 2014年第2期93-96,共4页
In this paper, the physical education information teaching design system is researched and developed based on VB6.0 optimization platform. According to the national physical education and health course standards and t... In this paper, the physical education information teaching design system is researched and developed based on VB6.0 optimization platform. According to the national physical education and health course standards and the fundamental theories of the constructivisrn, the author adopts the modular-design development method to design two functional areas which are the displaying of the teaching design contents and the online information database (nine modules in total) on the basis of the P.E. teaching design flow. Importantly, this system features the compatibility, scalability and practical applicability, and can effectively improve the ability of P.E. teachers to design their teaching, and hence provides a guarantee for the improvement of teaching quality and efficiency. 展开更多
关键词 Information Teaching Design SYSTEM P.E. Constmctivism
下载PDF
C.P.E.巴赫与贝多芬:歌曲《Bitten》“抄袭”的互文性解读
18
作者 陈海 《北方音乐》 2022年第3期55-68,共14页
德国诗人盖勒特于1757年创作了诗集《宗教颂歌与利德》。C.P.E.巴赫根据全部诗集谱写了歌曲集(H.686),贝多芬也根据其中的6首诗谱写了歌曲集(OP.48)。20世纪80年代以来,西方学者对两位作曲家的作品进行大量的比较研究,其观点认为“两部... 德国诗人盖勒特于1757年创作了诗集《宗教颂歌与利德》。C.P.E.巴赫根据全部诗集谱写了歌曲集(H.686),贝多芬也根据其中的6首诗谱写了歌曲集(OP.48)。20世纪80年代以来,西方学者对两位作曲家的作品进行大量的比较研究,其观点认为“两部作品存在极度相似性(尤其是歌曲《Bitten》),贝多芬或多或少地借鉴了前辈的作品”,这导致较多人对贝多芬“抄袭”巴赫作品观点的认同。文章在此问题上以“互文性”观点来解读两个文本存在着历时性的互文关系:贝多芬的“后文本”对“前文本”的借鉴、模仿抑或引用;“后文本”在此基础上做出较大的改变与拓展。从文化层面上阐述了贝多芬对C.P.E.巴赫作品的继承与发展。 展开更多
关键词 C.P.E.巴赫 贝多芬 歌曲 Bitten “抄袭” 互文性
下载PDF
Analysis on the Optimization of the P.E. Course Teaching Plan in Colleges and Universities
19
作者 Dongsheng WANG Zhijun WANG Jian ZUO 《International Journal of Technology Management》 2013年第5期111-113,共3页
In the new period, the physical education in colleges and universities is of greater and greater significance for the enhancement of students' learning efficiency. In this paper, the current situation of the current ... In the new period, the physical education in colleges and universities is of greater and greater significance for the enhancement of students' learning efficiency. In this paper, the current situation of the current physical education is analyzed, and also related suggestions on the optimization of the P.E. course teaching plan are proposed. 展开更多
关键词 Colleges and Universities P.E. Courses Teaching Plan Suggestions on the Optimization
下载PDF
修正磁化模型的多组分铁磁性颗粒运动研究 被引量:1
20
作者 陈巨辉 安然 +7 位作者 舒崚峰 李丹 刘晓刚 毛颖 陈纪元 高浩铭 吕文生 孟凡奇 《力学学报》 EI CAS CSCD 北大核心 2024年第3期740-750,共11页
铁磁性颗粒因具有铁磁性被广泛应用于化工环保、生化工程和能源等各个领域,磁场具有的穿透性质,对于采用铁磁性颗粒的系统,可通过改变磁场控制系统内颗粒的运动状态.文章基于传统的磁化模型,采用相对参考系转换方法,提出了适用范围更广... 铁磁性颗粒因具有铁磁性被广泛应用于化工环保、生化工程和能源等各个领域,磁场具有的穿透性质,对于采用铁磁性颗粒的系统,可通过改变磁场控制系统内颗粒的运动状态.文章基于传统的磁化模型,采用相对参考系转换方法,提出了适用范围更广的修正P-E磁化模型,可以计算铁磁性颗粒在任意方向磁场作用下所受磁化力.通过有限体积法(FVM)与离散单元法(DEM)耦合进行数值模拟,验证了修正P-E磁化模型的精确性,并模拟多组分颗粒在磁场中的运动,对比了铁磁性颗粒与惰性颗粒在不同配比及不同磁场条件下的运动特性,对颗粒分布、颗粒速度矢量和颗粒总能量变化3个方面进行分析.结果表明:在多组分颗粒系统中,铁磁性颗粒依旧保持成链特性,但成链速度与长度降低;随着铁磁性颗粒占比提高,铁磁性颗粒初始能量增大,聚链数量与成链长度将有所增加,约束惰性颗粒能力增强;此外,施加水平与竖直方向磁场时,多组分颗粒系统达到稳定速度最快,可以通过增大铁磁性颗粒占比有效提升稳定速度,使系统更快趋于稳定;而施加含有倾角的磁场时,随着铁磁性颗粒占比升高,铁磁性颗粒达到稳定状态需要的时间逐渐降低,较难通过改变铁磁性颗粒占比缩短稳定所需时间. 展开更多
关键词 多组分颗粒 铁磁性颗粒 FVM-DEM 修正P-E磁化模型 聚链
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部