Advances in Physics Theories and Applications最新文献_第8页

Thermodynamics Properties of Copper Halide Alloy (CuBr0.5Cl0.5) 卤化铜合金(CuBr0.5Cl0.5)的热力学性质

Advances in Physics Theories and Applications Pub Date : 2014-01-01 DOI: 10.18488/journal.75/2014.1.2/75.2.42.47

E. Parham, A. Mokhtari

引用次数: 0

DESIGN, CONSTRUCTION AND CALIBRATION OF A SOLAR RADIATION MEASURING METER 太阳辐射测量仪的设计、制造及校正

Advances in Physics Theories and Applications Pub Date : 2014-01-01 DOI: 10.18488/JOURNAL.75/2014.1.1/75.1.1.8

A. Asiegbu, E. Echeweozo

引用次数: 5

Landau-Pekar Bipolaron in Singlet and Triplet States 单重态和三重态的朗多-佩卡双极化子

Advances in Physics Theories and Applications Pub Date : 2014-01-01 DOI: 10.18488/JOURNAL.75/2014.1.1/75.1.9.33

V. Mukhomorov

{"title":"Landau-Pekar Bipolaron in Singlet and Triplet States","authors":"V. Mukhomorov","doi":"10.18488/JOURNAL.75/2014.1.1/75.1.9.33","DOIUrl":"https://doi.org/10.18488/JOURNAL.75/2014.1.1/75.1.9.33","url":null,"abstract":"We give an overview of studies a bipolaron stability by variational method. For bipolaron formations, a relation is established between the variational principle and the virial theorem optimizing the electronic wave functions. We present a large number of qualitative and quantitative arguments, which indicate that the Landau-Pekar bipolaron is an axially-symmetrical formation. Much attention is paid to the analysis of the influence of the Coulomb electron-electron correlations on the stability of a large bipolaron. In detail we analyzed the criteria for determining the optimal wave functions. It is established that a step-by-step increase in the flexibility of the electronic wave function due to the electron correlations does not stabilize a one-center bipolaron. We show after into account of electron-electron correlations a singlet bipolaron retains spatial axially-symmetrical. At the same time, the electron-excited triplet states of Landau-Pekar bipolaron have spherical symmetry. The results of Kasirina and Lakhno are based on the one-center bipolaron model are incorrect. Presented evidence that the correct application of the variational method and correct account of electron-electron correlations only increase the binding energy of the bipolaron but symmetry of Hartree-Fock approximation can not change. We adduce proofs which point to methodological errors of one-center bipolaron model as well as arising from their calculations incorrect physical consequences. As illustrated in this review the axially symmetric Landau-Pekar bipolaron can correctly interpret the experimentally detected spectroscopic data.","PeriodicalId":7386,"journal":{"name":"Advances in Physics Theories and Applications","volume":"63 1","pages":"9-33"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73963980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Energy Spectra and Wave Function Analysis of q-Deformed Modified Poschl-Teller and Hyperbolic Scarf II Potentials Using NU Method and a Mapping Method 用NU法和映射法分析q-变形修正Poschl-Teller势和双曲Scarf势的能谱和波函数

Advances in Physics Theories and Applications Pub Date : 2013-04-01 DOI: 10.7176/APTA-16-8

A. Suparmi, C. Cari, H. Yuliani

引用次数: 11

Statistical Analysis of Reliability Indices of Ikeja and Port-Harcourt Distribution Systems Ikeja和Port-Harcourt配电系统可靠性指标的统计分析

Advances in Physics Theories and Applications Pub Date : 1900-01-01 DOI: 10.7176/apta/77-06

G. Ajenikoko, V. Nwagbara

{"title":"Statistical Analysis of Reliability Indices of Ikeja and Port-Harcourt Distribution Systems","authors":"G. Ajenikoko, V. Nwagbara","doi":"10.7176/apta/77-06","DOIUrl":"https://doi.org/10.7176/apta/77-06","url":null,"abstract":"In the evaluation of the reliability levels of electrical power systems, reliability indices play a vital role. These indicators are System Average Interruption Duration Index (SAIDI), System Average Interruption Frequency Index (SAIFI) and Customer Average Interruption Duration Index (CAIDI). Statistical analysis of reliability indices of Ikeja and Port-Harcourt distribution system was carried out in this research paper.. Ten years of outage data information from ten selected distribution feeders of Ikeja and Port-Harcourt distribution systems were used in this work. The mean and standard deviation of the basic reliability indices were computed using appropriate mathematical relations as input parameters. Olowu feeder of Ikeja distribution system recorded the highest mean SAIDI of 01040 compared to all other feeders in the selected distribution system. Customers on this feeder were interrupted for a prolonged time while fewer of the customers were adequately served. 7-UP feeder of Ikeja distribution system had the least mean SAIDI of 0.0693 because customers’ interruption was for a short period of time even though; more customers were being served by the feeder. Airport of Port-Harcourt distribution system recorded the highest mean SAIDI of 0.1050. More customers were interrupted compared to all other feeders on the distribution system while fewer of them were adequately served. Airport feeder of Port Harcourt distribution system had a least mean SAIFI of 0.1392 because fewer of the customers attached to this feeder were interrupted while many of them were adequately served. The result of the work will provide a background information for distribution system engineers for adequate planning and effective maintenance of Ikeja and Portharcourt distribution systems. Keywords: Statistical analysis, Mean SAIDI, Mean SAIFI, Mean CAIDI, SAIDI standard deviation, SAIFI standard deviation, CAIDI standard deviation . DOI : 10.7176/APTA/77-06 Publication date :May 31 st 2019","PeriodicalId":7386,"journal":{"name":"Advances in Physics Theories and Applications","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81338778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0