Protecting Two-Qubit Quantum States by π\pi-Phase Pulses

We study the state decay of two qubits interacted with a common harmonic oscillator reservoir. There are both decoherence error and the error caused by the amplitude change of the superradiant state. We show that frequent $\pi$-phase pulses can eliminate both typpes of errors therefore protect a two-qubit odd-parity state more effectively than the frequent measurement method. This shows that the the methods using dynamical decoupling and the quantum Zeno effects actually can give rather {\em different} results when the operation frequency is finite

Entanglement distribution maximization over one-side Gaussian noisy channel

The optimization of entanglement evolution for two-mode Gaussian pure states under one-side Gaussian map is studied. Even there isn't complete information about the one-side Gaussian noisy channel, one can still maximize the entanglement distribution by testing the channel with only two specific states

Использование интернет-технологий для активизации процесса развития въездного туризма в РФ (на примере Томской области)

РЕФЕРАТ Объем работы – 102., рисунков – 7 , таблиц – 2, источников –61 . ИСПОЛЬЗОВАНИЕ ИНТЕРНЕТ ТЕХНОЛОГИЙ ДЛЯ АКТИВИЗАЦИИ ПРОЦЕССА РАЗВИТИЯ ВЪЕЗДНОГО ТУРИЗМА В РФ (НА ПРИМЕРЕ ТОМСКОЙ ОБЛАСТИ) Ключевые слова: интернет – технологии, туризм, въездной туризм, порталы. Актуальность Предмет исследования – исследования является интернет-технологии для повышения привлекательности региона для туристов. Объект исследования – интернет технологии. Проблему исследования Цель данной работы – исследования заключается в разработке предложений по совершенствованию туристского портала томской области. Для достижения поставленной цели определены следующие задачи: • Дать понятие и рассмотреть интернет технологии; • Рассмотреть состояние въездного туризма в зарубежных странах; • ПESSAY Volume of work - 102, figures - 7, tables - 2, sources -61. USING INTERNET TECHNOLOGY TO ENHANCE THE PROCESS OF DEVELOPMENT OF TOURISM IN THE RUSSIAN FEDERATION (THE EXAMPLE OF THE TOMSK REGION) Keywords: Internet - technology, tourism, inbound tourism portals. Relevance Subject of research - the study is an Internet-based technologies to enhance the attractiveness of the region for tourists. The object of study - Internet technology. research problem The purpose of this work - the research is to develop proposals for improving the tourist portal of the Tomsk region. To achieve this goal the following tasks: • Writing the concept and consider the Internet technology; • Consider the state of tourism in foreign countries; • Analyze the impact of Internet technology on the inbound t

Изучение сорбционных свойств активированного угля и оксигидрооксида алюминия для удаления гуминовых веществ из природных вод

It is found that the time of adsorption process of organic substances on activated carbon (PAC) Norit SA UF is about 3 hours. The maximum adsorption capacity of activated carbon to organic substances equals to 0.25 mg/mg. The maximum adsorption capacity of aluminum oxyhydroxide to organic substances equals to 2.3 mg/mg. Consequently, the aluminum oxyhydroxide has better adsorption characteristics in comparison with the activated carbon for removal of humic substances. It is shown that the destruction of the iron colloid substances occurs as a result of the removal of humic organic substances from the solution

DesignTracking: Track and Replay BIM-based Design Process

Among different phases of the life cycle of a building or facility, design is of the utmost importance to ensure safety, efficiency and sustainability of the building or facility. How to control and improve design quality and efficiency has been explored for years, and more studies emerged with the popularization of Building Information Modelling (BIM). However, most of them focused on the extraction of design behaviors, while paying less attention to how a design is formed. Therefore, this study proposes an approach to tracking and replaying the BIM-based design process by integrating data logging and 4D visualization techniques. First of all, potential design behaviors and procedures are analyzed and extracted by observing how a designer designs a BIM model. Meanwhile, the required data for logging design process is defined and a relevant method to collect these data is developed based on the APIs of BIM software. Then, strategies on how to visualize different design procedures are designed and implemented via 4D visualization. Finally, a prototype system is developed based on Autodesk Revit and validated through a case study. Result shows that the proposed approach enables intuitively and interactively review of the design process, and makes it easier to understand design behaviors and even identify potential pitfalls, thus improving the design efficiency and quality

Electronic structure of Fe1.04(Te0.66Se0.34)

We report the electronic structure of the iron-chalcogenide superconductor, Fe1.04(Te0.66Se0.34), obtained with high resolution angle-resolved photoemission spectroscopy and density functional calculations. In photoemission measurements, various photon energies and polarizations are exploited to study the Fermi surface topology and symmetry properties of the bands. The measured band structure and their symmetry characters qualitatively agree with our density function theory calculations of Fe(Te0.66Se0.34), although the band structure is renormalized by about a factor of three. We find that the electronic structures of this iron-chalcogenides and the iron-pnictides have many aspects in common, however, significant differences exist near the Gamma-point. For Fe1.04(Te0.66Se0.34), there are clearly separated three bands with distinct even or odd symmetry that cross the Fermi energy (EF) near the zone center, which contribute to three hole-like Fermi surfaces. Especially, both experiments and calculations show a hole-like elliptical Fermi surface at the zone center. Moreover, no sign of spin density wave was observed in the electronic structure and susceptibility measurements of this compound.Comment: 7 pages, 9 figures. submitted to PRB on November 15, 2009, and accepted on January 6, 201

Efficiency of electrochemical chloride removal from concrete at different environmental temperatures

Electrochemical chloride removal (ECR) is an effective and curative method to treat existed reinforced concrete structures about to suffer or already suffering from chloride attack, however, its application is still limited due to its side effect and efficiency, including the velocity and maximum capacity of chloride removal. This paper presents a temperature related numerical transport model to study the effect of temperature on efficiency of electrochemical chloride removal from concrete. Based on Fick’s law and Nernst-Planck equation with Gauss’ Law, temperature effect, chloride binding, multi-species coupling, electrochemical reactions were taken into account in this model. Temperature effect was considered on diffusion coefficient, chloride binding, ions migration capacity as well as electrolyte concentration. The model was validated by the comparison between the calculated results and experimental data. The results indicate that temperature dose have a considerable influence on electrochemical chloride removal and controlling temperature during treatment is a practical method to improve the electrochemical chloride removal when applied current density is not amplified