期刊文献+
共找到1,200篇文章
< 1 2 60 >
每页显示 20 50 100
New Approach to Find Initial Basic Feasible Solution (IBFS) for Optimal Solution in Transportation Problem
1
作者 Shubham Raval 《Open Journal of Applied Sciences》 CAS 2023年第2期207-211,共5页
Minimizing transportation time and getting optimal solutions are always considered as important factors while solving transportation problem. This paper shows a new approach for finding initial basic solution for tran... Minimizing transportation time and getting optimal solutions are always considered as important factors while solving transportation problem. This paper shows a new approach for finding initial basic solution for transportation problem which reduces cost of transportation more than any transportation method such as LCM, northwest, Vogel’s approximation and so on. This method has been illustrated by taking an example;afterwards, it compares basic initial feasible solution with other methods IBF and optimal dictate solutions such as MODI and Steppingstone method. 展开更多
关键词 Transportation Problem new approach for Transportation Problem Initial Basic Feasible Solution Minimizing Transportation Time
下载PDF
New approaches to gastric cancer staging:Beyond endoscopic ultrasound,computed tomography and positron emission tomography 被引量:17
2
作者 Hyuk Yoon Dong Ho Lee 《World Journal of Gastroenterology》 SCIE CAS 2014年第38期13783-13790,共8页
Currently, there is no single gold standard modality for staging of gastric cancer and several methods have been used complementarily in the each clinical situation. To make up for the shortcomings of conventional mod... Currently, there is no single gold standard modality for staging of gastric cancer and several methods have been used complementarily in the each clinical situation. To make up for the shortcomings of conventional modalities such as endoscopic ultrasound, computed tomography and <sup>18</sup>F-fluoro-2-deoxyglucose positron emission tomography, numerous attempts with new approaches have been made for gastric cancer staging. For T staging, magnifying endoscopy with narrow-band was evaluated to differentiate mucosal cancer from submucosal cancer. Single/double contrast-enhanced ultrasound and diffusion-weighted magnetic resonance imaging were also tried to improve diagnostic accuracy of gastric cancer. For intraoperative staging with sentinel node mapping, indocyanine green infrared and fluorescence imaging was introduced. In addition, to detect micrometastasis, real-time reverse transcription-polymerase chain reaction system with multiple markers was studied. Staging laparoscopy using 5-aminolevulinic acid-mediated photodynamic diagnosis and percutaneous diagnostic peritoneal lavage were also evaluated. However, most studies reporting new staging methods is preliminary and further studies for validation in clinical practice are needed. In this mini-review, we discuss new progress in gastric cancer staging. Especially, we focus on new diagnostic approach to gastric cancer staging beyond the conventional modalities and briefly review the remarkable clinical results of the studies published over the past three years. 展开更多
关键词 Gastric cancer Neoplasm staging Diagnostic accuracy new methods new approaches
下载PDF
New approach: removal of silicone oil and trocar assisted sutureless scleral fixated intraocular lens implantation at the same session 被引量:3
3
作者 Yuksel Totan Remzi Karadag 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2014年第4期734-736,共3页
Dear Sir,Iam Dr.Remzi Karadag,from the Department of Ophthalmology,Istanbul Medeniyet University School of Medicine,Istanbul,Turkey.I write to present two case reports of removal of silicone oil and trocar assisted su... Dear Sir,Iam Dr.Remzi Karadag,from the Department of Ophthalmology,Istanbul Medeniyet University School of Medicine,Istanbul,Turkey.I write to present two case reports of removal of silicone oil and trocar assisted sutureless scleral fixated intraocular lens implantation at the same session. 展开更多
关键词 IOL TSV new approach
下载PDF
New approaches for prevention and treatment of Alzheimer's disease:a fascinating challenge 被引量:4
4
作者 Luca Piemontese 《Neural Regeneration Research》 SCIE CAS CSCD 2017年第3期405-406,共2页
The prevention and treatment of neurodegenerative diseases is the new challenge for pharmaceutical industry,but also for public institutions,physicians,patients,and their families.The spread of these pathologies is,in... The prevention and treatment of neurodegenerative diseases is the new challenge for pharmaceutical industry,but also for public institutions,physicians,patients,and their families.The spread of these pathologies is,in fact,a real social problem,especially in the Western Countries where the population age is increasing and chronic diseases are more and more common. 展开更多
关键词 PPARS new approaches for prevention and treatment of Alzheimer’s disease:a fascinating challenge
下载PDF
A NEW APPROACH TO THE EQUATIONS FOR THE STEADY STATE CURRENTS AT MICROELECTRODES:EC'PROCESSES(SECOND ORDER REACTION) 被引量:1
5
作者 Qian Kun ZHUANG Hong Yuan CHEN Department of Chemistry,Nanjing University,210008,Nanjing 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第9期723-726,共4页
With a new approach,the general current expressions of two typical second order catalytic reactions at microelectrodes are obtained.This allows the study of fast chemical reactions and systems where the reactants are ... With a new approach,the general current expressions of two typical second order catalytic reactions at microelectrodes are obtained.This allows the study of fast chemical reactions and systems where the reactants are present in similar concentrations. 展开更多
关键词 EC A new approach TO THE EQUATIONS FOR THE STEADY STATE CURRENTS AT MICROELECTRODES SECOND ORDER REACTION AT
下载PDF
High Performance Hydrophobic Interaction Chromatography-A New Approach to Separate Intermediates of Protein Folding──Ⅰ.Separation of Intermediates of Urea-unfolded α-Amylase 被引量:1
6
作者 Quan BAI Yin Mao WEI +1 位作者 Ming Hui GENG Xin Du GENG(Institute of Modern Separation Science Northwest University Xi’an, 710069) 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第1期67-70,共4页
Based on the different hydrophobicities of the intermediates of proteins the various conformational intermediates of the refolding of a-amylase originally denatured with 8.0 mol/L urea solution were separated with hi... Based on the different hydrophobicities of the intermediates of proteins the various conformational intermediates of the refolding of a-amylase originally denatured with 8.0 mol/L urea solution were separated with high performance hydrophobic interaction chromatography(HPHIC). Compared to the separation of the same intermediates with weak anion exchange chromatography and size-exclusion chromatography the result obtained with HPHIC is the best It would be expected that HPHIC may be a strongly potential tool to separate intermediates of some proteins which cannot be, or cannot completely be refolded by HPHIC. 展开更多
关键词 Separation of Intermediates of Urea-unfolded OC High Performance Hydrophobic Interaction Chromatography-A new approach to Separate Intermediates of Protein Folding Amylase
下载PDF
The Reaction of ∝, β-epoxyketones with methoxymethylenetriphenylphosphorane, A New Approach to ∝-alkylsubstituted-γ-hydroxy-d, β-unsaturated aldehydes
7
作者 Li Bing YU Zhi Qin WANG Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Lu, Shanghai 200032 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第7期573-576,共4页
The reaction of α, β-epoxyketones with methoxymethylenetriphenyl- phosphorane provides a method for the preparation of α-alkylsubstituted γ-hydroxy-α, β-unsaturated aldehydes with one carbon homologation and ret... The reaction of α, β-epoxyketones with methoxymethylenetriphenyl- phosphorane provides a method for the preparation of α-alkylsubstituted γ-hydroxy-α, β-unsaturated aldehydes with one carbon homologation and retention of configuration. 展开更多
关键词 The Reaction of hydroxy-d unsaturated aldehydes epoxyketones with methoxymethylenetriphenylphosphorane A new approach to alkylsubstituted
下载PDF
A NEW APPROACH TO ESTIMATE KINETIC DECOMPOSITION FROM TG-DTG OR DSC CURVE
8
作者 Yu Ting ZHAO Jian Hua ZHANG Tong Shan SUN Department of Chemistry,Shandong University,Jinan,250100Zhao He YANG Institute of Crystal Materials,Shandong University,Jinan,250100 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第6期521-522,共2页
This paper reports a new approach to estimate kinetic parameters for the thermal decomposition of the solid state from TG-DTG or DSC curve.Reduced equations are derived for the first tlme.The validity of these equatio... This paper reports a new approach to estimate kinetic parameters for the thermal decomposition of the solid state from TG-DTG or DSC curve.Reduced equations are derived for the first tlme.The validity of these equations was demonstrated employing data obtained from the dehydration process of calcium oxalate monohydrate. 展开更多
关键词 DTG AI RT rate DSC A new approach TO ESTIMATE KINETIC DECOMPOSITION FROM TG-DTG OR DSC CURVE
下载PDF
A NEW APPROACH TO THE SYNTHESES OF THE PHEROMONES OF JAPANESE BEETLE AND BONTEBOK WITH(Z)-VINYL CUPRATES
9
作者 Zhang Huang XU YI Jun PAN +1 位作者 Jian Hong ZHAO Yan LI 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第5期395-398,共4页
The dl-form of the sex pheromone of Japanese b(?)tle and the trail pheromone of Bontebok were synthesised in high purity of (Z)-olefinic configuration. The key step of the syntheses of compounds (1) and (2) involved s... The dl-form of the sex pheromone of Japanese b(?)tle and the trail pheromone of Bontebok were synthesised in high purity of (Z)-olefinic configuration. The key step of the syntheses of compounds (1) and (2) involved stereospecific addition of n-alkyl cuprates to acetylene followed by addition of vinyl cuprates to aldehyde (7) and 3-buten--2-one. 展开更多
关键词 HMPA A new approach TO THE SYNTHESES OF THE PHEROMONES OF JAPANESE BEETLE AND BONTEBOK WITH VINYL CUPRATES
下载PDF
The Mixed Spin-1/2 and Spin-1 Ising–Heisenberg Model in the Mean-Field Approximation: a New Approach
10
作者 Erhan Albayrak 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第3期84-88,共5页
Thermodynamic properties of the mixed spin-1 and spin-1/2 Ising-Heisenberg model are studied on a honeycomb lattice using a new approach in the mean-field approximation to analyze the effects of longitudinal Dz and tr... Thermodynamic properties of the mixed spin-1 and spin-1/2 Ising-Heisenberg model are studied on a honeycomb lattice using a new approach in the mean-field approximation to analyze the effects of longitudinal Dz and transverse Dx crystal fields. The phase diagrams are calculated in detail by studying the thermal variations of the order parameters, i.e., magnetizations and quadrupole moments, and compared with the literature to assess the reliability of the new approach. It is found that the model yields both second- and first-order phase transitions, and tricritical points. The compensation behavior of the model is also investigated for the sublattice magnetizations, and longitudinal and transverse quadrupolar moments. The latter type of compensation is observed in the literature but its possible importance is overlooked. 展开更多
关键词 Heisenberg Model in the Mean-Field Approximation The Mixed Spin-1/2 and Spin-1 Ising a new approach
下载PDF
New Approaches Needed for Poverty Alleviation Efforts in 21^(st) Century
11
《China Population Today》 2000年第Z2期19-20,共2页
关键词 In new approaches Needed for Poverty Alleviation Efforts in 21 CENTURY
下载PDF
New Approach to Study the Evolution of Rossby Wave Packet
12
作者 任舒展 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 1991年第1期79-86,共8页
The average variational principle was employed in this paper to study the evolution of large-scale and slowly varying Rossby wave packet with basic flow both in barotropic and baroclinic atmospheres. The evolution of ... The average variational principle was employed in this paper to study the evolution of large-scale and slowly varying Rossby wave packet with basic flow both in barotropic and baroclinic atmospheres. The evolution of the structure of Rossby wave packet with both time and space was studied. The results obtained in this paper are similar to the results of by WKBJ method. In addition, the dispersive process of the wave packet was analysed by taking Gaussian type wave packet as an initial disturbance. The valid time scale for application of wave packet theory in the atmosphere was obtained. 展开更多
关键词 new approach to Study the Evolution of Rossby Wave Packet
下载PDF
New Stage、New Problems and New Approach: to the Celebration of the 50th Anniversary of AI
13
作者 Y. X. Zhong 《南昌工程学院学报》 CAS 2006年第2期43-45,共3页
关键词 new Stage new Problems and new approach to the Celebration of the 50th Anniversary of AI
下载PDF
New Approach to Solve Cubic Objective Function Programming Problem
14
作者 Media A. Omer Nejmaddin A. Sulaiman 《American Journal of Operations Research》 2022年第3期83-93,共11页
In this paper, a cubic objective programming problem (COPP) is defined. Introduced a new modification to solve a cubic objective programming problem. Suggested an algorithm for its solution. Also reported the algorith... In this paper, a cubic objective programming problem (COPP) is defined. Introduced a new modification to solve a cubic objective programming problem. Suggested an algorithm for its solution. Also reported the algorithm of the usual simplex method. Application talks about how the developed algorithm can be used to unravel non-linear. The proposed technique, modification simplex technique, can be used with the constructed numerical examples an illustrative numerical problems are given to demonstrate the algorithms. 展开更多
关键词 new approach Cubic Objective Programming Problem Simplex Method
下载PDF
Taking a New Approach
15
作者 Ni Yanshuo 《ChinAfrica》 2012年第2期20-21,共2页
THE tiny Chinese village of Wukan in Guangdong Province has gone from obscurity to public prominence in three months. More than 10,000 villagers who call Wukan home embarked on a three-month long confrontation with th... THE tiny Chinese village of Wukan in Guangdong Province has gone from obscurity to public prominence in three months. More than 10,000 villagers who call Wukan home embarked on a three-month long confrontation with the local government in September 2011, an event watched closely by the entire country. In the process, much public debate was stirred up, providing food for thought about how the country should be governed, most notably in rural areas. 展开更多
关键词 Taking a new approach PRO CPC
下载PDF
Center Offers New Approach to Street Children
16
作者 GONG YIDONG 《The Journal of Human Rights》 2005年第5期15-17,共3页
关键词 MSF Center Offers new approach to Street Children
下载PDF
A new approach for correlating rain fall and water level data
17
《Global Geology》 1998年第1期57-58,共2页
关键词 A new approach for correlating rain fall and water level data
下载PDF
Advantage of NMR and FTIR Spectroscopy to Determine Structure Role of CeO<sub>2</sub>in Complicated Borosilicate Glasses: New Approach 被引量:1
18
作者 Gomaa El-Damrawi Abdelmeguid K. Hassan +1 位作者 Salma Ehmead Amal El Shahawy 《New Journal of Glass and Ceramics》 2017年第2期22-33,共12页
Microstructure of complicated glasses in the system 30Na2O-2Al2O3-25 SiO2-xCeO2 (43-x) B2O3, x changes from 0.5 to 20 mol% have been extensively studied. Structural determination of glasses containing high cerium oxid... Microstructure of complicated glasses in the system 30Na2O-2Al2O3-25 SiO2-xCeO2 (43-x) B2O3, x changes from 0.5 to 20 mol% have been extensively studied. Structural determination of glasses containing high cerium oxide content (≥8 mol% CeO2) was carried out by 11B NMR and FTIR spectroscopy. On the other hand, 29Si MAS NMR experiment is hardly to be applied to glasses of CeO2 > 8 mol%. This is due to the paramagnetic action which is raised by cerium cations causing dilution or delaying in the resonance phenomenon. It is evidenced from NMR data that sodium oxide is high enough to modify the glass forming units which constitute the skeleton of the glass. Ceria is as well as silica and B2O3 all are acting as glass forming species. Decreasing of both fraction of boron tetrahedral units (N4) and chemical shift of silicon nuclei (δ) confirm the role of CeO2 as a glass former. On the other hand, fast decrease in N4 and chemical shift of Si nuclei with further increasing CeO2 contents (≥8 mol%) gives a clear evidence that the ability of cerium oxide to participate as a network former increases with increasing its content. New approach is applied to determine the fraction of CeO4 as a glass forming units. In this approach, we use the common advantage of 11B NMR and FTIR spectroscopy to obtain Ce4 fraction. The latter species cannot be determined from NMR spectroscopy, since very high relaxation time and magnetization of ceria cause intensive spectral broadening which prevent resonance spectra to be appeared. 展开更多
关键词 NMR Spectroscpy Cerium Oxide new approach Glasses
下载PDF
New Approach for Noninvasive Determination of Tissue Optical Properties
19
作者 Bingquan Chen, Shangming Yang, Ruiping Chen, Fujun Zhang, Dongcao Song, Shengzhi ZhaoInstitute of Biomedical Optics, Yantai University, Shandong 264005, China, Tel: +86-535-6901993, Fax: +86-535-6903201, chen_bingquan@163.com. Department of Physics and Engineering Physics, Stevens Institute ofTechnology, Hoboken, NJ 07030, USA, Tel: +1-201-216-5587, Fax: +1-201-216-5638, bchenl@stevens-tech.edu.school of Informatics and Engineering, Shandong University, Shandong 250100, China. 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期807-808,共2页
A state-of-the-art radiative transfer model for the coupled air/tissue system is introduced. We then present a feasibility study of a new method for determining the tissue optical properties.
关键词 for in on AS of new approach for Noninvasive Determination of Tissue Optical Properties
原文传递
A New Approach to Database Auto-Design by Logic
20
作者 徐洁盘 王磊 《Journal of Computer Science & Technology》 SCIE EI CSCD 1991年第2期201-204,共4页
The database auto-design is an important problem in database research.In this paper we propose some new ideas and an approach called“logic approach”to implement the database auto-design.Given a relational scheme and... The database auto-design is an important problem in database research.In this paper we propose some new ideas and an approach called“logic approach”to implement the database auto-design.Given a relational scheme and a set of the functional dependencies for the relation we can obtain all of the functional dependencies and key for the relation and determine the normal form the relation satisfies. 展开更多
关键词 AUTO A new approach to Database Auto-Design by Logic DESIGN
原文传递
上一页 1 2 60 下一页 到第
使用帮助 返回顶部