检索结果-南通市图书馆

A Numerical Study of Quantum Decoherence

Communications in Computational Physics 2012年第6期12卷 85-108页

作者： Riccardo Adami claudia negulescu Dipartimento di Matematica e Applicazioni Universita di Milano Bicoccavia R.Cozzi5320125 MilanoItaly CMI/LATP(UMR 6632) Universit´e de Provence39rue Joliot Curie13453 Marseille Cedex 13France

The present paper provides a numerical investigation of the decoherence effect induced on a quantum heavy particle by the scattering with a light *** time dependent two-particle Schr¨odinger equation is solved by means of a time-splitting *** damping undergone by the non-diagonal terms of the heavy particle density matrix is estimated numerically,as well as the error in the Joos-Zeh approximation formula.

关键词： Quantum mechanics Schr¨odinger equation heavy-light particle scattering interference decoherence numerical discretization numerical analysis splitting scheme

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Model of a Quantum Particle in a Quantum Environment: A Numerical Study

引用

Communications in Computational Physics 2015年第6期18卷 247-262页

作者： Raffaele Carlone Rodolfo Figari claudia negulescu Universita Federico II di Napoli Dipartimento di Matematica e Applicazioni“R.Caccioppoli”MSA I-80126 NapoliItaly Universita Federico II di Napoli Dipartimento di Fisica e INFN Sezione di NapoliMSA I-80126 NapoliItaly Universite de Toulouse&CNRS UPSInstitut de Mathematiques de Toulouse UMR 5219F-31062 ToulouseFrance

We define and investigate,via numerical analysis,a one dimensional toymodel of a cloud *** energetic quantum particle,whose initial state is a superposition of two identical wave packets with opposite average momentum,interacts during its evolution and exchanges(small amounts of)energy with an array of localized *** by the interaction with the environment,the initial superposition state turns into an incoherent sum of two states describing the following situation:or the particle is going to the left and a large number of spins on the left side changed their states,or the same is happening on the right *** evolution is reminiscent of what happens in a cloud chamber where a quantum particle,emitted as a spherical wave by a radioactive source,marks its passage inside a supersaturated vapour-chamber in the form of a sequence of small liquid bubbles arranging themselves around a pssible classical trajectory of the particle.

关键词： Schrodinger equation quantum particle+environment model multi-channel point interactions Wilson cloud chamber trace formation decoherence numerical discretization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

OPTIMIZATION DESIGN OF WASTEWATER TREATMENT

OPTIMIZATION DESIGN OF WASTEWATER TREATMENT

引用

International Conference on Water & Wastewater

作者： negulescu,Gh.,Mircea Prof.Dr.Ing. Academy of the Socialist Republic of Romania

＜正＞The rapid development of industry simultaneous with the urbanization,led to a stronger pollution of water ***,in the same time,new processes of wastewater treatment of different types have been developed which resulted in a more and more difficult evaluation of various treatment solutions.（1）,（2）,（4）.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Seismic Vulnerability Assessment from Earthquake Damages Historical Data Using Constrained Optimization Technique

引用

Journal of Geoscience and Environment Protection 2018年第2期6卷 89-111页

作者： Abed Benaichouche Caterina negulescu Olivier Sedan Zohra Boutaraa BRGM(French Geological Survey) OrléansFrance Materials Sciences and Environment Laboratory Hassiba Ben Bouali University of ChlefChlefAlgeria

This present work falls within the context of efforts that have been made over the past many years, aimed in improving the seismic vulnerability modelling of structures when using historical data. The historical data describe the intensity and the damages, but do not give information about the vulnerability, since only in the ’90 the concept of vulnerability classes was introduced through the EMS92 and EMS98 scales. Considering EMS98 definitions, RISK-UE project derived a method for physical damage estimation. It introduced an analytical equation as a function of an only one parameter (Vulnerability Index), which correlates the seismic input, in term of Macroseismic Intensity, with the physical damage. In this study, we propose a methodology that uses optimization algorithms allowing a combination of theoretical-based with expert opinion-based assessment data. The objective of this combination is to estimate the optimal Vulnerability Index that fits the historical data, and hence, to give the minimum error in a seismic risk scenario. We apply the proposed methodology to the El Asnam earthquake (1980), but this approach remains general and can be extrapolated to any other region, and more, it can be applied to predictive studies (before each earthquake scenarios). The mathematical formulation gives choice for regarding, to the optic of minimizing the error, either for the: 1) very little damaged building (D0-D2 degree) or 2) highly damaged building (D4-D5 degree). These two different kinds of optics are adapted for the people who make organizational decisions as for mitigation measures and urban planning in the first case and civil protection and urgent action after a seismic event in the second case. The insight is used in the framework of seismic scenarios and offers advancing of damage estimation for the area in which no recent data, or either no data regarding vulnerability, are available.

关键词： Seismic Damage Scenario Damage Database Vulnerability Assessment Inverse Optimization Model Calibration El Asnam Earthquake RISK-UE

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：