783 research outputs found
The Energy-Efficient Dynamic Route Planning for Electric Vehicles
Aiming to provide an approach for finding energy-efficient routes in dynamic and stochastic transportation networks for electric vehicles, this paper addresses the route planning problem in dynamic transportation network where the link travel times are assumed to be random variables to minimize total energy consumption and travel time. The changeable signals are introduced to establish state-space-time network to describe the realistic dynamic traffic network and also used to adjust the travel time according to the signal information (signal cycle, green time, and red time). By adjusting the travel time, the electric vehicle can achieve a nonstop driving mode during the traveling. Further, the nonstop driving mode could avoid frequent acceleration and deceleration at the signal intersections so as to reduce the energy consumption. Therefore, the dynamically adjusted travel time can save the energy and eliminate the waiting time. A multiobjective 0-1 integer programming model is formulated to find the optimal routes. Two methods are presented to transform the multiobjective optimization problem into a single objective problem. To verify the validity of the model, a specific simulation is conducted on a test network. The results indicate that the shortest travel time and the energy consumption of the planning route can be significantly reduced, demonstrating the effectiveness of the proposed approaches.
Document type: Articl
Forward study of the structural materials for the supporting system of the clic two-beam module
The supporting system for the CLIC Two-Beam Module plays a fundamental role for the support and alignment of the RF-components. Thus, the structural materials of the girder and V-shaped supports, along with their corresponding joining methods, need to follow a dedicated study. So far, one baseline and one so-called alternative material have been studied and the very first supporting system prototypes have been produced out of both materials, and undergo validation testing. The stiffness properties in combination with issues faced regarding the precise assembly of the V-shaped supports and the girders require an additional study. The aim of this thesis is to investigate and study potential candidate materials which present similar mechanical properties compared to the materials used for the prototype fabrications so far.
The thesis is divided by the theoretical part, followed by the experimental part. In the theoretical part, the mechanical properties of selected materials are studied and compared. The factors limiting the material selection for the supporting system and their corresponding joining methods for the different materials are studied. In addition, the thesis focuses on determining an innovative testing methodology for the studied materials. Furthermore, the relevant optical inspection is foreseen to validate and to provide additional information regarding the surface quality and shape of the fractured area on the candidate materials which will be tested. The goal of the testing part is to obtain and process the experimental data through a series of mechanical and possibly radiation tests on material specimens, in order to validate and confirm or reject the potential use of the tested materials for CLIC fabrications, such as the supporting system of the Module or other. Moreover, the scientific approach of the thesis can result to a useful extension on the material mapping that takes place for the CLIC structural materials
Preparation and solution properties of a novel cationic hydrophobically modified polyacrylamide for enhanced oil recovery
Financial support from National Natural Science Foundation of China (51504050, 51774062), Scientific and Technological Research Program of Chongqing Municipal Education Commission (KJ1601305) and Research Foundation of Chongqing University of Science & Technology (CK2016B07, CK2016Z20).Peer reviewedPostprin
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Psychometric Properties of the Chinese version of UPPS-P Impulsive Behavior Scale.
OBJECTIVE: The present study aimed to assess the psychometric properties of a Chinese version of the UPPS-P Impulsive Behavior Scale. The associations between the UPPS-P scale and impulsivity choice, gender, smoking, and drinking status were also assessed. METHODS: A total of 127 adults ranging from 21 to 65 years old participated in the study. Participants were administered with the Chinese version of the UPPS-P Impulsive Behavior Scale, Beck Depression Inventory II (BDI-II), and State-Trait Anxiety Inventory (STAI). Impulsivity choice tasks were also tested including the Delay Discounting Task (DDT), Balloon Analogue Risk Task (BART), and Beads Task (Beads). RESULTS: A new version of the UPPS-P Impulsive Behavior Scale was formed that includes 40 items. The scores of the UPPS-P Impulsive Behavior Scale demonstrated adequate internal consistency on five subscales but less sufficient structure validity in the present sample. In addition, positive urgency was negatively related to the Beads task; negative urgency and positive urgency were positively related to the DDT and BART. Moreover, positive and negative urgency were positively correlated with depression; all five subscales were positively correlated with anxiety; sensation seeking was higher in males than females and in alcohol drinkers than non-drinkers; and lack of premeditation and lack of perseverance were higher in nonsmokers than smokers. CONCLUSIONS: The present study supports the reliability but not the structure validity of the UPPS-P Impulsive Behavior Scale. The impulsivity personality trait assessed by the UPPS-P scale was associated with impulsivity choice, depression, anxiety, gender, and drinking and smoking status. Further studies should be conducted to explore the structure of impulsivity in the Chinese population
Unshifted Metastable He I* Mini-Broad Absorption Line System in the Narrow Line Type 1 Quasar SDSS J080248.18551328.9
We report the identification of an unusual absorption line system in the
quasar SDSS J080248.18551328.9 and present a detailed study of the system,
incorporating follow-up optical and NIR spectroscopy. A few tens of absorption
lines are detected, including He I*, Fe II* and Ni II* that arise from
metastable or excited levels, as well as resonant lines in Mg I, Mg II, Fe II,
Mn II, and Ca II. All of the isolated absorption lines show the same profile of
width km s centered at a common redshift as that of
the quasar emission lines, such as [O II], [S II], and hydrogen Paschen and
Balmer series. With narrow Balmer lines, strong optical Fe II multiplets, and
weak [O III] doublets, its emission line spectrum is typical for that of a
narrow-line Seyfert 1 galaxy (NLS1). We have derived reliable measurements of
the gas-phase column densities of the absorbing ions/levels. Photoionization
modeling indicates that the absorber has a density of and a column density of , and is located at
pc from the central super-massive black hole. The location of the absorber, the
symmetric profile of the absorption lines, and the coincidence of the
absorption and emission line centroid jointly suggest that the absorption gas
is originated from the host galaxy and is plausibly accelerated by stellar
processes, such as stellar winds \zhy{and/or} supernova explosions. The
implications for the detection of such a peculiar absorption line system in an
NLS1 are discussed in the context of co-evolution between super-massive black
hole growth and host galaxy build-up.Comment: 28 pages, 16 figures; accepted for publication in Astrophysical
Journa
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Submission of Evidence on Online Violence Against Women to the UN Special Rapporteur on Violence Against Women, its Causes and Consequences, Dr Dubravka Šimonović
Figure S1. B3GALNT2 levels determined by W.B. and ROC curve. aâc Relative mRNA expression of B3GALNT2 in HCC tumor tissues and normal liver tissues obtained from GSE76427, GSE36376, and TCGA-LIHC datasets. d Western blot analysis of B3GALNT2 levels in 24 pairs of HCC tissues. T HCC tumor tissue, N adjacent non-tumor tissue. e ROC curve analysis of the sensitivity and specificity for the predictive value of TNM model, B3GALNT2 expression, and the combination model. (TIFF 546Â kb
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