Autor: Wu, W. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Non-Markovian Dynamic of Gaussian Quantum Discord in Continuous-Variable Systems
Autorzy:: Liu, X.
Wu, W.
Tematy:: 03.65.Yz
03.65.Ta
03.65.Ud
03.67.Mn; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1203878.pdf Link otwiera się w nowym oknie
Opis:: We show the special dynamic characteristic of Gaussian quantum discord, exhibited by two-mode Gaussian symmetric squeezed thermal states (STS) in continuous-variable (CV) systems with a common non-Markovian environment, is definitely different from Markov processes. We demonstrate that Gaussian quantum discord can be created whenever the information flow from environment back to the system. We also show that the rate of decrease for Gaussian quantum discord is related to the coupling constant. We discover that the initial value of Gaussian quantum discord is determined by the average number of thermal photons of the system.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Prace IPPT IFTR Reports ; 2/2008
FE-Calculations of Stress Distribution under Prismatic and Conical Sandpiles within Hypoplasticity
Autorzy:: Wu, W.
Tejchman, J.
Współwytwórcy:: Kowalczyk, Piotr Marian. Red.
Kotulski, Zbigniew (1955– ). Red.
Sosnowski, Włodzimierz. Red.
Wydawca:: Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk
Powiązania:: Prace IPPT IFTR REPORTS
Opis:: Proceedings of the 36th Solid Mechanics Conference, Gdańsk, Poland, September 9-12, 2008
198-199 s.
Rozszerzone streszczenia wykładów konferencyjnych
Extended Abstracts of Conference Lectures
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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Skocz do pozycji: 3.

Tytuł:: Towards the building information modeling-based capital project lifecycle management in the luxury yacht industry
Autorzy:: Liu, F.
Chen, C.
Wu, W.
Tematy:: building information modelling
luxury yacht
communication
interoperability
capital
project lifecycle management
framework; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/259822.pdf Link otwiera się w nowym oknie
Opis:: It will be a new approach that BIM’s capital project lifecycle management (CPLM) applied to the yacht industry. This paper explored the feasibility of applying the principles and rationales of BIM for capital project lifecycle management in luxury yacht design, engineering, fabrication, construction and operation. The paper examined the premises and backbone technology of BIM. It then evaluated leading naval engineering and shipbuilding software applications and their development trends from the functional lens of BIM. To systematically investigate a BIM-based approach for capital project lifecycle management (CPLM) in the luxury yacht industry, the paper proposed and outlined an implementation framework. A case study and a student competition use case were discussed to delineate the core constituents and processes of the proposed framework. The case of BIM was reviewed. Through the domestic custom luxury yacht design and prototyping student competition, the application of this framework in educational research is demonstrated and the initial quantitative assessment of the framework is carried out. Conclusions: a BIM-based CPLM implementation framework can help the luxury yacht industry capitalize on the global transformation to an information-centric and data-driven new business paradigm in shipbuilding with integrated design, manufacturing and production.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Efficiency comparison between the LLCL and LCL-filters based single-phase grid-tied inverters
Autorzy:: Wu, W.
Huang, M.
Blaabjerg, F.
Tematy:: LCL filter
LLCL-filter
efficiency power loss
modulation
single-phase grid-tied inverter; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/140537.pdf Link otwiera się w nowym oknie
Opis:: An LLCL-filter is becoming more attractive than an LCL-filter as the interface between the grid-tied inverter and the grid due to possibility of reducing the copper and the magnetic materials. The efficiency of the LLCL-filter based single-phase grid-tied inverter also excites interests for many applications. The operation of the switches of the VSI is various with different modulation methods, which lead to different efficiencies for such a single-phase grid-tied inverter system, and therefore important research has been carried out on the effect of the choice of PWM schemes. Then power losses and efficiencies of the LLCL-filter and the LCL-filter based single-phase grid-tied inverters are analyzed and compared under the discontinuous unipolar, the dual-buck and the bipolar modulations. Results show that the efficiency of LLCL-filter based inverter system is higher than the LCL- filter based independent on the modulation method adopted. Experiments on a 2 kW prototype are in good agreement with results of the theoretical analysis.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Development of “4E” levelriver-sea-going ship
Autorzy:: Pei, Z.
Yuan, Q.
Wu, W.
Tematy:: energy-saving
environment-friendly
high performance ship
“4E” level ship
flat-type river-sea-going ship; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/259069.pdf Link otwiera się w nowym oknie
Opis:: In order to effectively promote the construction of the Yangtze River economic belt, it has become China’s national strategy to vigorously develop the river-sea-going transportation. In the present paper, theoretical analysis, numerical simulation and model test are combined together to develop flat-type river-sea-going ship which is characterized with larger loading capacity, lower fuel consumption, better performance on energy-saving and environmental-friendly, excellent economy and higher transportation efficiency. Key technologies on hydrodynamic performance, structural safety, energy-saving technology and green ship technology are investigated to develop the river-sea-going ship. The developed “4E” level ship has great significance to the implementation of national strategic deployment.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Progressive collapse test of ship structures in waves
Autorzy:: Pei, Z.
Xu, T.
Wu, W.
Tematy:: ship hull girder
progressive collapse behavior
ultimate strength
external force
collapse test; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/260139.pdf Link otwiera się w nowym oknie
Opis:: The external loads and structural ultimate strength are two important aspects for the safety of ship hull girder. It may collapse in case the structural capacity is less than the external forces in extreme seas. In the present research, progressive collapse test is performed to investigate the collapse mechanism of ship structure in waves. External load with time history and corresponding structural collapse behavior are measured and discussed to demonstrate the interaction of fluid and structures.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Comparison of five depth-averaged 2-d turbulence models for river flows
Autorzy:: Wu, W.
Wang, P.
Chiba, N.
Tematy:: turbulence model
depth-averaged two-dimensional model
river flow
zero-equation turbulence model
k-e turbulence model; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Powiązania:: https://bibliotekanauki.pl/articles/241492.pdf Link otwiera się w nowym oknie
Opis:: In this study, five depth-averaged 2-D turbulence models for river flows, including the depth-averaged parabolic eddy viscosity model, modified mixing length model, standard k-e turbulence model, non-equilibrium k-e turbulence model and re-normalized group (RNG) k-e turbulence model, are compared in the simulation of flows around a spur-dyke, in a sudden-expanded flume and in two natural rivers. It is shown that in the two field cases where the channel geometries are simple, all five models can give generally good predictions for the main flow features. However, in the two laboratory cases where the channel geometries are complex, differences have been found among these models. The depth-averaged parabolic eddy viscosity model over-predicts the recirculation flows behind the spur-dyke and the flume expansion. The modified mixing length model gives better prediction than the depth-averaged parabolic model. The standard k-e turbulence model predicts well for the recirculation flow in the sudden-expended flume, but under-predicts the length of recirculation zone behind the spur-dyke, while the non-equilibrium and RNG k-e turbulence models provide good results for both laboratory cases.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Prace IPPT IFTR Reports ; 2/2008
Update a Simple Hypoplastic Constitutive Model
Autorzy:: Wu, W.
Wang, X. T.
Tejchman, J.
Współwytwórcy:: Kowalczyk, Piotr Marian. Red.
Kotulski, Zbigniew (1955– ). Red.
Sosnowski, Włodzimierz. Red.
Wydawca:: Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk
Powiązania:: Prace IPPT IFTR REPORTS
Opis:: Proceedings of the 36th Solid Mechanics Conference, Gdańsk, Poland, September 9-12, 2008
Rozszerzone streszczenia wykładów konferencyjnych
206-207 s.
Extended Abstracts of Conference Lectures
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

Książka

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Skocz do pozycji: 9.

Tytuł:: Study on striking ship with loading impact on the performance of the double hull oil tanker collision
Autorzy:: Wu, W.
Yang, Y.
Zhang, J.
Lu, J.
Tematy:: ship collision
fluid-structure interaction
impact parameters
numerical simulation; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/258890.pdf Link otwiera się w nowym oknie
Opis:: Due to the great danger of the collision of oil tankers, lots of research on the collision of oil tankers has been carried out. But, at present, the research on the collision of oil tankers mainly focuses on the loading condition of the struck ship, ignores the impact on the loading condition of the striking ship. However, during the actual oil tanker collision, the striking ship is generally in the state of loading. Therefore, it is necessary to carry out the analysis of the impact of the loading condition of the striking ship on the collision damage of the oil tanker. In this paper, the effect of striking ship with loading on the impact performance of the side structure during the collision of the cargo double hull oil tanker has been investigated. The ship collision model was established by using the finite element software ANSYS/ LS-DYNA which is based on 7000 tons of double hull oil tankers. Based on the analysis of the collision force, impact of striking speed changes, impact of striking deep changes and structural energy absorption during the collision process, the influence of the striking ship with loading on the damage mechanism and the impact performance of the double shell oil ship side structure was expounded. The results show that the influence of the striking ship with loading can be great to the damage to side hull during the research of the collision performance of the oil tanker.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Leading edge skewed-swept diagonal compressor rotor and numerical analysis on its internal flow mechanism
Autorzy:: Zhou, B.
You, B.
Wu, W.
Wu, K-Q.
Tematy:: skewed-swept diagonal compressor
vaneless diffuser
performance test; Pokaż więcej
Wydawca:: Politechnika Gdańska
Powiązania:: https://bibliotekanauki.pl/articles/1943229.pdf Link otwiera się w nowym oknie
Opis:: The structure of each part of a diagonal compressor directly affects its overall performance and internal flow. We introduce the Reynolds-averaged Navier-Stokes flow simulation for unit calculation on the whole system including a diagonal impeller, a vaneless diffuser and a volute. By analyzing different flow chromatograms of specific sections, we can compare the configuration of three types of diffusers and volutes and the meridian flow status of the corresponding diagonal compressors which serves as a basis for the impeller flow path as well as for its matching designs. Considering the interference between the rotor and the upstream and downstream stillness body, this thesis analyzes how the vaneless diffuser meridian flow path, the volute flow path and its section secondary flow affect the upstream rotor flow. Both the calculation and experimental data on the rotor outlet are compared, as well as the calculated numerical value of the meridian plane streamline distribution and the diffuser velocity distribution, upstream and downstream, coincides with the designed numerical value. Without changing the conventional quasi-three-dimensional design system, the thesis applies the annulus wall boundary layer theory and the velocity distribution diagram to sweep and skew the leading edge of the airfoil. A performance test shows that the leading edge skewed-swept diagonal rotor can better improve the stall characteristic in a low flow rate area and expand the surge margin, compared with conventional diagonal rotor. It can also efficiently restrain the low-momentum fluid conglomeration near the wall region and reduce the secondary flow loss by sweeping and skewing the blade properly. The purpose of the thesis is to make a contribution to optimizing the overall structure design of diagonal compressors and to study further the complex internal flow between the leading edge skewed-swept diagonal rotor and the cover.
Dostawca treści:: Biblioteka Nauki

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