Xiaoan Tang

Xiaoan Tang
National University of Defense Technology | NUDT · Department of Electronic Science and Technology

About

50
Publications
1,030
Reads
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251
Citations
Citations since 2017
1 Research Item
99 Citations
201720182019202020212022202305101520
201720182019202020212022202305101520
201720182019202020212022202305101520
201720182019202020212022202305101520
Introduction
Skills and Expertise

Publications

Publications (50)
Article
We report on investigations of transport properties of BaAg2SnSe4 and the effect of Ga and In doping in the structure. The experimental work is supported by calculations of the electronic band structure and phonon dispersion relations. The thermal conductivity of BaAg2SnSe4 is exceptionally low with a value of 0.50 Wm⁻¹K⁻¹ at 300 K and decreasing t...
Article
Although AgSbTe2 compound has been intensively studied as a promising medium-temperature p-type thermoelectric (TE) material, its thermodynamic stability is still a controversial issue. We have prepared selenium-doped and pristine AgSbTe2 compounds from high-purity elements by a melt-quench-spark plasma sintering (Melt-SPS) or a melt spinning-SPS t...
Article
We have prepared Ce-doped polycrystalline AgSbTe2.01 compounds from high-purity elements by a melt-quench technique followed by spark plasma sintering, and their thermoelectric transport properties have been investigated in the temperature range of 300 K to 625 K. The actual concentration of Ce was much less than the initial composition, but roughl...
Article
Full-text available
The crystal structure and powder X-ray diffraction (XRD) patterns for three skutterudite samples, Fe(Sb2+xTe1−x), x = 0.05, 0.10, 0.20, have been determined. These compounds crystallize in the cubic space group . Te was found to randomly substitute in the Sb site. Because of the fact the covalent radius of Sb is greater than that of Te, a trend of...
Article
Fear conditioning alters sleep, with the most consistent effect being significant reductions in rapid eye movement sleep (REM). DBA/2 (D2) mice show behavioral signs of anxiety, respond greater to shock training, and potentially behave differently in cued and contextual fear, raising the question of how fear conditioning would affect their sleep. D...
Article
Purpose: As an emerging imaging method for preclinical and eventually clinical applications, the grating-based x-ray differential phase contrast (DPC) CT has drawn increasing interest. It has been hoped that the potential detectability index d' in the DPC-CT can be significantly larger than its counterpart in the conventional attenuation-based CT....
Conference Paper
The differential phase contrast CT implemented with x-ray Talbot interferometry is a new CT imaging technology with the potential of significantly improving contrast sensitivity of the conventional attenuation-based x-ray CT. The research and development along this scientific/technological path have seen increasing activities recently. Via theoreti...
Conference Paper
PURPOSE The differential phase contrast (DPC) CT is emerging as new technology to improve the contrast sensitivity of the conventional CT substantially. Via computer simulation and system analysis, we study the noise power spectrum (NPS) – an imaging performance indicator – of the DPC-CT and compare it with that of the conventional CT. METHOD AND...
Article
Terrain visibility analysis is widely used in many areas, but the existing methods still have some unsolved problems, such as complexity in computation and bad applicability. In this paper, a depth mapping based method is given to solve the problem. First, the terrain was rendered with perspective projection from the observation point, and the dept...
Article
Rapid eye movement sleep (REM) is increased after controllable stress (modeled by escapable footshock, ES) and decreased after uncontrollable stress (modeled by inescapable footshock, IS). Decreases in REM after IS are exacerbated by corticotropin releasing factor (CRF) and attenuated by a CRF antagonist. In this study, we trained mice with ES foll...
Article
A series of ternary (Ag2Te)x (Sb2Te3)100−x (x = 44 to 54) bulk materials with in situ generated Ag2Te nanoparticles were prepared from high-purity elements by combining the melt-quench technique with the spark plasma sintering technique. The influence of the Ag2Te nanoparticles on the thermoelectric transport properties, and the mechanism of nanopa...
Article
This paper presents a texture-based algorithm for vector data display that is able to precisely and efficiently overlay traditional 2D vector data on a 3D multi-resolution terrain model. By the algorithm, depending on the view to the scene first, a perspective projection is created, to match the currently visible range of the terrain. Then the proj...
Article
High performance, dynamic customization, and automatization had become new requirements for the battlefield environment support system in the high-tech local wars, so task-oriented service platform for battlefield environment information(TSPBEI) need to be realized. Firstly, A task-oriented integration framework was established, which supporting mu...
Article
As an important characteristic of geo-spatial elements, scale has become an important aspect in GIS study. However, the existing algorithms mainly solve scale generalization problems of some specific types of data in 2D, which are not suitable for multi-elements integration of general GIS environment, especially in 3D GIS. With the help of ideas an...
Conference Paper
In order to make a military system more practicable, dynamic and scalable, task-oriented geospatial information service for battlefield (BGIS) need to be established. Information Integration is important means and essential precondition of BGIS construction, so BGIS was researched on from three aspects: service mode integration, service data integr...
Conference Paper
With the development of GIS, it is in great need of integration of multi-source heterogeneous spatial data at different scales. Most of the existing scale generalization algorithms aim at particular types of geo-spatial objects, which are short of versatility. Based on the functional classification and the definition of multi-scale generalization o...
Article
Single-phase nanostructured bulk Yb0.2Co4Sb12 skutterudites have been prepared by combining a melt spinning technique with spark plasma sintering. The effects of a pre-annealing process on the microstructure and phase composition of ribbon samples and bulk materials are investigated. After the pre-annealing process, average grain size increases fro...
Article
Type I clathrate bulk materials Ba8Sb2Ga14Ge30 were prepared by the melt spinning (MS) technique combined with the spark plasma sintering (SPS) method. The microstructure and thermoelectric transport properties of the compounds were investigated. The results show that the grain size decreases greatly compared with materials obtained by the traditio...
Article
A series of compounds with composition Ag0.5In0.5−x Pb5Sn4Te10 (x = 0.05 to 0.20) were prepared by slowly cooling the melts of the corresponding elements, and the effect of In content on the thermoelectric transport properties of these compounds has been investigated. Results indicate that the compounds’ electronic structure is sensitive to In cont...
Article
Controllability is an important determinant of the effects of stress on behavior. We trained mice with escapable (ES) and inescapable (IS) shock and examined behavioral freezing and Fos expression in brain regions involved in stress to determine whether stressor controllability produced differential activation of these regions. Mice (C57BL/6J) were...
Chapter
Stress-induced alterations in sleep have been linked to the development of post-traumatic stress disorder (PTSD), and sleep complaints and disturbances in arousal are continuing symptoms in patients. PTSD-related changes in sleep have not been fully characterized but appear to involve persistent disturbances in both rapid eye movement (REM) and non...
Conference Paper
This paper presents a kind of visualization model for electromagnetic signals according to battle actualities and tactics needs. In modern battles, complex electromagnetic environment is difficult to control as its invisibility and variety. According with the requirement of tactics application, the proposed model provides a new way to simulate elec...
Conference Paper
A dynamic analysis tools integration model based on geo-workflow is presented, through the analysis of the sea battlefield environmental analysis process. Geo-workflow is a new technology to manage spatial processes, but its methodology, especially scheduling of data flow, is till weak. In the paper, the traditional workflow model is extended and a...
Article
Sleep mechanisms and synaptic plasticity are thought to interact to regulate homeostasis and memory formation. However, the influences of molecules that mediate synaptic plasticity on sleep are not well understood. In this study we demonstrate that mice lacking Rab3 interacting molecule 1 alpha (RIM1 alpha) (Rim1 alpha KO), a protein of the synapti...
Article
Corticotropin releasing hormone (CRH) plays a major role in central nervous system responses to stressors and has been implicated in stress-induced alterations in sleep. In the absence of stressors, CRH contributes to the regulation of spontaneous waking. We examined the effects of CRH and astressin (AST), a non-specific CRH antagonist, on wakefuln...
Article
The amygdala has emerged as an important forebrain modulator of arousal. Acetylcholine plays a role in the regulation of sleep and wakefulness, particularly rapid eye movement sleep (REM). The major cholinergic input to the amygdala comes from the basal forebrain, a region primarily linked to wakefulness. We examined sleep and the encephalogram for...
Article
Pontine tegmental lesions can eliminate the atonia of rapid eye movement sleep (REM) and allow animals to exhibit overt behavior at the same time that other electrophysiological signs of REM are intact. We produced electrolytic lesions in the reticularis pontis oralis (RPO) and reticularis pontis caudalis (RPC) in rats and observed them for behavio...

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