期刊文献+
共找到3,888篇文章
< 1 2 195 >
每页显示 20 50 100
Exploring the compatibility theory of traditional Chinese medicine formulae:the disassembled prescriptions study
1
作者 Xue Yang Xin-Yuan Luan 《Traditional Medicine Research》 2023年第5期38-43,共6页
Traditional Chinese medicine(TCM)has become very popular in the treatment of complex diseases worldwide in recent decades.Despite the promising performance of TCM,how herbs work synergistically in a formula and their ... Traditional Chinese medicine(TCM)has become very popular in the treatment of complex diseases worldwide in recent decades.Despite the promising performance of TCM,how herbs work synergistically in a formula and their therapeutic targets remain ambiguous.This largely limits the correct use and modernization of TCM formulas clinically.The study of disassembled prescriptions is important for investigating the compatibility theory of Chinese medicines.By dissecting the mechanisms of TCM formulae,the compatibility principles of some well-known formulae,such as Realgar-Indigo naturalis,have been elucidated to a certain extent.In this review,several common methods of disassembled prescription studies are summarized,including those of single herb or mineral,sub-prescription,active ingredients or effective parts,large formulae,and systems pharmacology studies,as well as the methods of grouping based on the properties or efficacy of Chinese medicines,in order to provide evidence for formulae study.Moreover,some challenges to be addressed in disassembled prescriptions studies have been identified in this review. 展开更多
关键词 compatibility theory of formulae traditional Chinese medicine disassembled prescriptions study systems pharmacology
下载PDF
Structural and functional connectivity of the whole brain and subnetworks in individuals with mild traumatic brain injury:predictors of patient prognosis
2
作者 Sihong Huang Jungong Han +4 位作者 Hairong Zheng Mengjun Li Chuxin Huang Xiaoyan Kui Jun Liu 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第7期1553-1558,共6页
Patients with mild traumatic brain injury have a diverse clinical presentation,and the underlying pathophysiology remains poorly understood.Magnetic resonance imaging is a non-invasive technique that has been widely u... Patients with mild traumatic brain injury have a diverse clinical presentation,and the underlying pathophysiology remains poorly understood.Magnetic resonance imaging is a non-invasive technique that has been widely utilized to investigate neuro biological markers after mild traumatic brain injury.This approach has emerged as a promising tool for investigating the pathogenesis of mild traumatic brain injury.G raph theory is a quantitative method of analyzing complex networks that has been widely used to study changes in brain structure and function.However,most previous mild traumatic brain injury studies using graph theory have focused on specific populations,with limited exploration of simultaneous abnormalities in structural and functional connectivity.Given that mild traumatic brain injury is the most common type of traumatic brain injury encounte red in clinical practice,further investigation of the patient characteristics and evolution of structural and functional connectivity is critical.In the present study,we explored whether abnormal structural and functional connectivity in the acute phase could serve as indicators of longitudinal changes in imaging data and cognitive function in patients with mild traumatic brain injury.In this longitudinal study,we enrolled 46 patients with mild traumatic brain injury who were assessed within 2 wee ks of injury,as well as 36 healthy controls.Resting-state functional magnetic resonance imaging and diffusion-weighted imaging data were acquired for graph theoretical network analysis.In the acute phase,patients with mild traumatic brain injury demonstrated reduced structural connectivity in the dorsal attention network.More than 3 months of followup data revealed signs of recovery in structural and functional connectivity,as well as cognitive function,in 22 out of the 46 patients.Furthermore,better cognitive function was associated with more efficient networks.Finally,our data indicated that small-worldness in the acute stage could serve as a predictor of longitudinal changes in connectivity in patients with mild traumatic brain injury.These findings highlight the importance of integrating structural and functional connectivity in unde rstanding the occurrence and evolution of mild traumatic brain injury.Additionally,exploratory analysis based on subnetworks could serve a predictive function in the prognosis of patients with mild traumatic brain injury. 展开更多
关键词 cognitive function CROSS-SECTION FOLLOW-UP functional connectivity graph theory longitudinal study mild traumatic brain injury prediction small-worldness structural connectivity subnetworks whole brain network
下载PDF
A comparative investigation of an AB- and AA-stacked bilayer graphene sheet under an applied electric field:A density functional theory study 被引量:1
3
作者 汪涛 郭清 +1 位作者 刘艳 盛况 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第6期451-455,共5页
An AB-and AA-stacked bilayer graphene sheet (BLG) under an electric field is investigated by ab initio calculation. The interlayer distance between the two layers, band structures, and atomic charges of the system a... An AB-and AA-stacked bilayer graphene sheet (BLG) under an electric field is investigated by ab initio calculation. The interlayer distance between the two layers, band structures, and atomic charges of the system are investigated in the presence of different electric fields normal to the BLG. The AB-stacked BLG is able to tune the bandgap into 0.234 eV with the increase of the external electronic field to 1 V/nm, however, the AA-stacked BLG is not sensitive to the external electric field. In both the cases, the spacing between the BLG slightly change in terms of the electric field. The charges in the AB-stacked BLG are increased with the increase of the electric field, which is considered to be the reason that causes the bandgap opening in the AB-stacked BLG. 展开更多
关键词 GRAPHENE bandgap density functional theory study
下载PDF
Study of Polymer Blends with Sub-cluster Theory PartⅠ Essential Concepts and Equations of Sub-cluster Theory 被引量:2
4
作者 Riguang JIN and Hangquan LI (Beijing Institute of Chemical Technology, Beijing, 100029, China)(To whom correspondence should be addressed) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1994年第2期111-116,共6页
Various viscosity-composition curves of polymer blends are summarized in eight groups. To represent these curves. 'sub-cluster equations' are derived on the basis of so called 'sub-cluster theoryThe essent... Various viscosity-composition curves of polymer blends are summarized in eight groups. To represent these curves. 'sub-cluster equations' are derived on the basis of so called 'sub-cluster theoryThe essential concepts of sub-cluster theory and the derivation of those 'Sub-cluster equations' are briefly introduced. 展开更多
关键词 Essential Concepts and Equations of Sub-cluster theory study of Polymer Blends with Sub-cluster theory Part
下载PDF
Using of Key Stratum Theory to Study the Structural Development of Roof Aquifer 被引量:2
5
作者 CHEN Li ZHANG Fawang +4 位作者 YAO Hongchao HAN Zhantao QIAN Long CHEN Liang JIANG Chengchao 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2015年第6期2091-2091,共1页
During the underground mining of coal resources,overlying rocks on the roof of excavated tunnels will be destroyed due to ground pressure,and as a result,part of them will break and fall into the tunnels.How to determ... During the underground mining of coal resources,overlying rocks on the roof of excavated tunnels will be destroyed due to ground pressure,and as a result,part of them will break and fall into the tunnels.How to determine the distribution of fractured areas and fissures presents a major problem for preserving the overlying aquifer. 展开更多
关键词 In Using of Key Stratum theory to study the Structural Development of Roof Aquifer
下载PDF
Oderly accumulation theory of shale system petroleum resource and its prospecting significance-A case study of Chang 7 Member of Yanchang Formation in Ordos Basin 被引量:5
6
作者 Cui Jingwei Zhu Rukai +1 位作者 Li Shixiang Zhang Zhongyi 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第S1期265-266,共2页
1 Introduction Shale formations bear abundant mineral resource and*unconventional petroleum resource,and the unconventional petroleum resource that contain in the shale formation should be integrated and researched.
关键词 In Oderly accumulation theory of shale system petroleum resource and its prospecting significance-A case study of Chang 7 Member of Yanchang Formation in Ordos Basin
下载PDF
The Theory Study of the Influence of the Topography on the Cold Frontal Motion 被引量:1
7
作者 顾伟 伍荣生 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 1992年第2期167-172,共6页
In order to study the characteristics of cold frontal motion over the arbitrary topography, the velocity of cold frontal movement is derived by using the one layer shallow-water model. The results show that there exis... In order to study the characteristics of cold frontal motion over the arbitrary topography, the velocity of cold frontal movement is derived by using the one layer shallow-water model. The results show that there exist the retardation in upwind side and rapid descent in the lee slope when the cold front crosses the topography. 展开更多
关键词 In the theory study of the Influence of the Topography on the Cold Frontal Motion
下载PDF
A Contrastive Study on the Two Chinese Versions of Anne of Green Gables Based on Skopos Theory
8
作者 高志香 《海外英语》 2014年第20期244-245,252,共3页
On the basis of the three major rules of Skopos theory,the author of this thesis makes great efforts to make a contrastive study on the two Chinese versions of the famous novel Anne of Green Gables,illustrating mainly... On the basis of the three major rules of Skopos theory,the author of this thesis makes great efforts to make a contrastive study on the two Chinese versions of the famous novel Anne of Green Gables,illustrating mainly from the perspectives of paragraph,syntax,diction and rhetoric as well as notes and omission. 展开更多
关键词 Skopos theory CONTRASTIVE study DICTION
下载PDF
An Analysis Into Ba Sentences Under Image Schema Theory——A Case Study of Words of Fire——Poems by Jidi Majia
9
作者 WU Jie-ying FENG Yu-juan 《Journal of Literature and Art Studies》 2019年第4期369-375,共7页
The Ba sentence is unique existence in Chinese. There is no corresponding sentence pattern in English. Thus, the translation of Ba sentences is a challenge for translators. Even with the myriad analyses on the transla... The Ba sentence is unique existence in Chinese. There is no corresponding sentence pattern in English. Thus, the translation of Ba sentences is a challenge for translators. Even with the myriad analyses on the translation of Ba sentences, small quantity of them demonstrates the correctness and the reading effect of the translation by using a specific theory. And the image schema theory reflects the projects between the source domain and the target domain, while in the translation analysis there are schemata in the source language and the target language. So the paper does comparisons of schemata between the source text and the target text of Ba sentences, which are chosen from the English translation of Words of Fire—Poems by Jidi Majia translated by Denis Mair. After the demonstration, the following conclusions are found: First, the schema of the sentence is decided by verbs of the Ba sentences, rather than by the sentence structures;second, the image schema is a feasible tool to check correctness of Ba sentences translation. 展开更多
关键词 image SCHEMA theory BA SENTENCES case study
下载PDF
Relevance Theory-based Cognitive Study on the Communication Effect of “China's Stories”
10
作者 Yang Xiaohong Wu Lingwei 《Contemporary Social Sciences》 2017年第6期23-32,共10页
Telling the story of China and transmitting the voice of China has become a strategy to promote the national image and cultural soft power of China. Since its implementation in 2013, China has ushered in a significant... Telling the story of China and transmitting the voice of China has become a strategy to promote the national image and cultural soft power of China. Since its implementation in 2013, China has ushered in a significant change in communication ideas and approaches. This strategy also enriches the communication genres of "China's stories" and more importantly enhances its communication effect. In this context, it is necessary to understand and study the significance of this strategic practice, assess the value realization of "China's stories" during the communication process, and thereby establish a basis for future communication of more "China's stories." Based on the factors of relevance theory, this paper analyzes the ideas of and approaches to effective communication of "China's stories" and proposes corresponding strategies. 展开更多
关键词 relevance theory China’s stories communication effect cognitive study
下载PDF
Study of Polymer Blends with Sub-cluster Theory Part 2 Comparison of PVC/ABS, PVC/SBS Blends
11
作者 Riguarng JIN and Hangquan LI(Bejing Institute of Chemical Technology, Beijing, 100029, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1994年第3期181-187,共7页
Series of PVC/ABS and PVC/SBS blends of composition 20/ 80. 40/ 60, 60 / 40 and 80 / 20were prepared in a screw extruder. The phase morphology, miscibility and rheological behaviour of two systems were investigated. T... Series of PVC/ABS and PVC/SBS blends of composition 20/ 80. 40/ 60, 60 / 40 and 80 / 20were prepared in a screw extruder. The phase morphology, miscibility and rheological behaviour of two systems were investigated. The viscosity-composition plots were represented by sub-cluster equation, the various differences between two systems are interpreted with the equation parameters 展开更多
关键词 PVC/SBS Blends SBS study of Polymer Blends with Sub-cluster theory Part 2 Comparison of PVC/ABS
下载PDF
A PRELIMINARY STUDY ON THE THEORY OF THE SECOND AND THIRD ORDER DERIVATIVE ADSORPTION CHRONOPOTENTIOMETRY FOR A REVERSIBLE REACTION
12
作者 Hong Guang ZHANG Wen Rui JIN Department of Chemistry,Shandong University,Jinan,250100,ShandongFu Song HUANG Department of Computer Science,Shandong University,Jinan,250100,Shandong 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第3期257-258,共2页
The equations of the second and third order derivative curves of time with respect to potential for a reversible process in adsorption chronopotentiometry are derived and experimentally verified.
关键词 In RT A PRELIMINARY study ON the theory of the SECOND AND THIRD ORDER DERIVATIVE ADSORPTION CHRONOPOTENTIOMETRY FOR A REVERSIBLE REACTION
下载PDF
A Cognitive Semantic Study on English Preposition“ON”—from the Per spective of“Schema Theory”
13
作者 兰天 《海外英语》 2020年第4期67-68,共2页
In terms of“schema theory”and“metaphor theory”,the semantics of English preposition“on”are divided into three main parts in this article,including core meaning,metaphorical meaning and special uses of it.Further... In terms of“schema theory”and“metaphor theory”,the semantics of English preposition“on”are divided into three main parts in this article,including core meaning,metaphorical meaning and special uses of it.Furthermore,it organizes and elabo rates on the semantics of each part,in order to better analyze the polysemy of English preposition“on” 展开更多
关键词 ENGLISH preposition“on” SEMANTIC study SCHEMA theory
下载PDF
Comparative Study on Lin Yutang’s Translation Principle and Skopos Theory’s Three Rules of Translation
14
作者 史雨嘉 《海外英语》 2019年第19期120-121,124,共3页
An review of the similarities and disparities on the ideas of translation between Lin Yutang’s translation principle and German Functional School’s Skopos Theory finds that,for the three rules in both theories,two r... An review of the similarities and disparities on the ideas of translation between Lin Yutang’s translation principle and German Functional School’s Skopos Theory finds that,for the three rules in both theories,two rules which involve fidelity and smoothness/coherence share some similarities.Though both Lin and Skopos Theory argue that fidelity and smoothness/coher?ence are significant indicators for translation,their focus and priority are not identical.Lin stresses the importance of beauty while Skopos Theory focuses on the skopos of the translation.Lin’s translation rules are more suitable for literature translation,while Skopos Theory is more popular among those who conduct instrumental translation and documentary translation. 展开更多
关键词 COMPARATIVE study LIN Yutang Skopos theory TRANSLATION RULES
下载PDF
An Empirical Study on Problems of English Phonetic Teaching in Primary Schools and Countermeasures Based on Constructivism Theory-A Case Study of
15
作者 WANGJia-wen 《Sino-US English Teaching》 2017年第1期8-15,共8页
下载PDF
On Cognitive Study of Synaesthesia
16
作者 纪昌娥 雷佳 《海外英语》 2011年第12X期374-375,共2页
This paper concentrates on two theories of synaesthesia—Conceptual Metaphor Theory and Conceptual Blending Theory from cognitive angle.
关键词 SYNAEStheSIA COGNITIVE study CONCEPTUAL METAPHOR theory CONCEPTUAL Blending theory
下载PDF
Gender Emergency:Fear of the Forsaken
17
作者 Simonetta Milli Konewko 《Journal of Literature and Art Studies》 2023年第4期215-224,共10页
Considered a great example of investigative fiction,Mia per sempre[Mine Forever]which denounces violence against women,encourages them to speak out,seek assistance,and refuse to flee in terror,has been hailed as outst... Considered a great example of investigative fiction,Mia per sempre[Mine Forever]which denounces violence against women,encourages them to speak out,seek assistance,and refuse to flee in terror,has been hailed as outstanding work to denounce violence against women.The book is a study of women’s unusual relationships,which are marked by intense love,envious friendships,and unbreakable ties that result in mental instability,irrational behavior,or uncontrollable behavior.Tani’s work has also received recognition for including the knowledgeable perspectives of various specialists who offer a deeper and priceless understanding of these catastrophes occurring individuals’home.This study examines those instances of fear-sharing in relation to women’s independence and ability to move on or start new lives.The main question is how and why Tani’s employs fear.Who are the women or circumstances that cause fear?This paper considers the theoretical discourse on fear developed by scholars of the emotions such as,among others,Jaimal Yogis and Olsson and Phelps in order to examine the circumstances and outcomes of fear fashioned by Tani in her representation of Italian men’s criminal reaction to women’s autonomy. 展开更多
关键词 femicide women studies theories of emotions theories of fear Italian literature investigative journalism investigative fiction
下载PDF
Comparative study of different theories on active earth pressure 被引量:1
18
作者 S.P.Yap F.A.Salman S.M.Shirazi 《Journal of Central South University》 SCIE EI CAS 2012年第10期2933-2939,共7页
Determination of distribution and magnitude of active earth pressure is crucial in retaining wall designs.A number of analytical theories on active earth pressure were presented.Yet,there are limited studies on compar... Determination of distribution and magnitude of active earth pressure is crucial in retaining wall designs.A number of analytical theories on active earth pressure were presented.Yet,there are limited studies on comparison between the theories.In this work,comparison between the theories with finite element analysis is done using the PLAXIS software.The comparative results show that in terms of distribution and magnitude of active earth pressure,RANKINE's theory possesses the highest match to the PLAXIS analysis.Parametric studies were also done to study the responses of active earth pressure distribution to varying parameters.Increasing soil friction angle and wall friction causes decrease in active earth pressure.In contrast,active earth pressure increases with increasing soil unit weight and height of wall.RANKINE's theory has the highest compatibility to finite element analysis among all theories,and utilization of this theory leads to proficient retaining wall design. 展开更多
关键词 主动土压力 挡土墙设计 有限元分析 内摩擦角 土压力分布 分析理论 朗肯理论 RANK
下载PDF
Theoretical Study on the Structure and Stability of Si_5X (X = Li, Be, B, C, N, O, F, Na, Mg, Al, Si, P, S, Cl) Clusters
19
作者 张宏 孙仁安 +1 位作者 李纳 阎杰 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第3期279-284,共6页
Density functional theory B3LYP/6-311 G* method was used in the geometry optimization and frequency calculation on Si5X (X = Li, Be, B, C, N, O, E Na, Mg, Al, Si, P, S, Cl) clusters. The influence of the doped seco... Density functional theory B3LYP/6-311 G* method was used in the geometry optimization and frequency calculation on Si5X (X = Li, Be, B, C, N, O, E Na, Mg, Al, Si, P, S, Cl) clusters. The influence of the doped second and third period element impurities on the structure and stability of Si5X clusters with C2p symmetry has been investigated, and the thermal stability and dynamic activity have also been discussed. 展开更多
关键词 Si clusters theoretical study DFT theory
下载PDF
Theoretical Study on the Structure and Stability of Si_4X (X = Li, Be, B, C, N, O, F) Clusters
20
作者 孙仁安 李钠 张旭 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2004年第12期1383-1387,共5页
The density functional theory B3LYP/6-311g* method is used in the geometry optimization and frequency calculation on Si4X (X = Li, Be, B, C, N, O, F) clusters. The equi- librium structures of these clusters are quas... The density functional theory B3LYP/6-311g* method is used in the geometry optimization and frequency calculation on Si4X (X = Li, Be, B, C, N, O, F) clusters. The equi- librium structures of these clusters are quasi-trigonal bipyramidal structures with C2v symmetry. The periodicity of their thermal stabilities and vibration spectra has been discussed. The influence of the inserted second period element impurities for the structures and stabilities of the Si5 clusters have also been investigated. 展开更多
关键词 Si clusters theoretical study density functional theory
下载PDF
上一页 1 2 195 下一页 到第
使用帮助 返回顶部