Hefei, China

Hefei University of Technology is a major university in China, with particular strength in Engineering and Management Science. It is located in Hefei, the capital of the Anhui Province.Hefei University of Technology is a national key university administrated directly by the Ministry of Education. It has been listed in major national initiatives seeking to enhance the international competitiveness of the top-tier universities in China such as Project 211 and Project 985 Innovation Platform.Since its founding in 1945, it has been committed to cultivating talent with excellence, advancing science and technology, pushing social development, and promoting culture, with the spirit best manifested in the university motto "pursuing virtue and knowledge, seeking truth and innovation".HFUT has four campuses – Tunxilu, Lu'anlu, Feicuihu and Xuancheng – covering an area of about 3,417,390 m². The first three campuses are located in Hefei, the provincial capital of Anhui, and the fourth is in Xuancheng, a city about 194 kilometers away from Hefei.Campuses in Hefei have 19 schools covering a wide range of fields with a strong focus on engineering science. The schools offer 82 undergraduate programs, 32 first-level disciplines with authorization to confer master degrees, 12 first-level disciplines for doctoral programs as well as 12 post-doctoral programs. 4 disciplines are selected as national key disciplines and 28 are provincial key disciplines. The university has 1 state key lab, 1 national engineering lab, 4 national university-industry joint engineering research centers and 46 research centers at the ministerial or provincial level as well as 1 national A-level architectural design and research institute. The campus in Xuancheng has 5 departments.The university has a high-level faculty team consisting of 1,824 full-time teachers, among whom 33 enjoy special government allowances of the State Council in recognition of outstanding achievements in their fields. It also boasts 1 academician of the Chinese Academy of Engineering, 8 distinguished experts of the national Thousand Talents Program, 6 accredited professors and 7 chair professors of Yangtze Scholar Program, 5 granted with funds from the National Outstanding Youth Science Foundation, 1 member of Disciplinary Appraisal Panel of the State Council, 1 member of Academic Degrees Committee of the State Council, 10 winners of the national awards for top teachers, etc. The efforts of the dedicated faculty empower the advancement of the university. At present, HFUT enrolls 29,480 undergraduate students and 11,800 graduate students. It has made remarkable achievements in student education. Throughout the years, key disciplines, courses, textbooks, teaching and experiment centers, teaching staff of HFUT have won numerous awards at all levels, highly reputed in China. It is among the first batch of 61 pilot colleges and universities to conduct the Education and Development Plan for Outstanding Engineers initiated by the Ministry of Education. About 200 projects carried out by HFUT students have been funded by the National University Student Innovation Program. HFUT is dedicated to educating its graduates to become innovative engineering talents with professional proficiency, positive working attitude and entrepreneurship.HFUT sticks to innovation and the integration of teaching, research and production. It has a long-established, application-oriented research culture, and it is keen to support the academics in conducting research that has impact and practical value. It is committed to promoting the development of regional economy by catering to the strategic objectives and needs of the industries, the community and the nation. In 2013, the university has an annual research funding in science of over RMB 447 million. The applications for invention patents total 357, of which 204 are licensed; besides, 82 computer software patents are granted. In recent years, HFUT has won 5 national science-and-technology-related awards, and 19 first prizes at the ministerial or provincial level.HFUT is actively pursuing connections with leading institutions through academic partnerships with top universities worldwide. By supporting a wide range of collaborative activities including faculty and student exchange projects, joint supervision plan and international programs at all levels, HFUT has established academic links with more than 30 prestigious universities around the world, such as Ohio State University in U.S.A. Meanwhile, hundreds of international students from over 30 countries and regions are studying at HFUT.Hefei University of Technology, with its 70-year achievements in several key disciplines, is now striving for even greater success with the ultimate goal of becoming a top innovative university with international prestige and distinctive features. Wikipedia.

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Agency: Cordis | Branch: H2020 | Program: FCH2-RIA | Phase: FCH-04.3-2014 | Award Amount: 1.51M | Year: 2015

The aim of the HySEA project is to conduct pre-normative research on vented deflagrations in enclosures and containers for hydrogen energy applications. The ambition is to facilitate the safe and successful introduction of hydrogen energy systems by introducing harmonized standard vent sizing requirements. The partners in the HySEA consortium have extensive experience from experimental and numerical investigations of hydrogen explosions. The experimental program features full-scale vented deflagration experiments in standard ISO containers, and includes the effect of obstacles simulating levels of congestion representative of industrial systems. The project also entails the development of a hierarchy of predictive models, ranging from empirical engineering models to sophisticated computational fluid dynamics (CFD) and finite element (FE) tools. The specific objectives of HySEA are: - To generate experimental data of high quality for vented deflagrations in real-life enclosures and containers with congestion levels representative of industrial practice; - To characterize different strategies for explosion venting, including hinged doors, natural vent openings, and commercial vent panels; - To invite the larger scientific and industrial safety community to submit blind-predictions for the reduced explosion pressure in selected well-defined explosion scenarios; - To develop, verify and validate engineering models and CFD-based tools for reliable predictions of pressure loads in vented explosions; - To develop and validate predictive tools for overpressure (P) and impulse (I), and produce P-I diagrams for typical structures with relevance for hydrogen energy applications; - To use validated CFD codes to explore explosion hazards and mitigating measures in larger enclosures, such as warehouses; and - To formulate recommendations for improvements to European (EN-14994), American (NFPA 68), and other relevant standards for vented explosions.

Zhao Y.,Xiamen University | Liang W.,Hefei University of Technology
Chemical Society Reviews | Year: 2012

This tutorial review primarily illustrates rate theories for charge transfer and separation in organic molecules for solar cells. Starting from the Fermi's golden rule for weak electronic coupling, we display the microcanonical and canonical rates, as well as the relationship with the Marcus formula. The fluctuation effect of bridges on the rate is further emphasized. Then, several rate approaches beyond the perturbation limit are revealed. Finally, we discuss the electronic structure theory for calculations of the electronic coupling and reorganization energy that are two key parameters in charge transfer, and show several applications. © 2012 The Royal Society of Chemistry.

Liu J.-W.,Hefei University of Technology | Liang H.-W.,Hefei University of Technology | Yu S.-H.,Hefei University of Technology
Chemical Reviews | Year: 2012

An overview of the developments in the field of emerging macroscopic-scale nanowire thin films that are composed of integrated nanowires or their random components, including assembly principles and strategies for design, fabrication, and applications, is presented. Zhang et al. have reported a facile approach to the fabrication of large-scale regular concentric arrays of aligned organic nanowires by simply allowing solvent evaporation in a confined geometry. Khondaker and co-workers have reported a single-walled carbon nanotube (SWNT) assembly process induced by DEP in a probe station under ambient conditions. Myoung et al. reported a programmable nanowire integration route for fabricating field-effect Si NW transistors that have uniform transfer characteristics on intentionally organized gate sites. Yu and co-workers reported a new type of electrocatalyst, a free-standing Pt nanowire (Pt NW) membrane, which was fabricated via a smart multistep templating process.

Liu R.,Hefei University of Technology
Monthly Notices of the Royal Astronomical Society | Year: 2013

We report in this paper a solar eruptive event, in which a vertical current sheet (VCS) is observed in the wake of an erupting flux rope in the Solar Dynamic Observatory (SDO)/Atmospheric Imaging Assembly (AIA) 131Å passband. The VCS is first detected following the impulsive acceleration of the erupting flux rope but prior to the onset of a non-thermal hard X-ray (HXR)/microwave burst, with plasma blobs moving upwards at speeds up to 1400 km s-1 along the sheet. The timing suggests that the VCS with plasma blobs might not be the primary accelerator for non-thermal electrons emitting HXRs/microwaves. The initial, slow acceleration of the erupting structure is associated with the slow elevation of a thermal looptop HXR source and the subsequent, impulsive acceleration is associated with the downward motion of the looptop source. We find that the plasma blobs moving downwards within the VCS into the cusp region and the flare loops retracting from the cusp region make a continuous process, with the former apparently initiating the latter, which provides a 3D perspective on reconnections at the VCS. We also identify a dark void moving within the VCS towards the flare arcade, which suggests that dark voids in supra-arcade downflows are of the same origin as plasma blobs within the VCS. ©2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.

Sun Y.,Hefei University of Technology | Gao S.,Hefei University of Technology | Xie Y.,Hefei University of Technology
Chemical Society Reviews | Year: 2014

Atomically-thick two-dimensional crystals can provide promising opportunities to satisfy people's requirement of next-generation flexible and transparent nanodevices. However, the characterization of these low-dimensional structures and the understanding of their clear structure-property relationship encounter many great difficulties, owing to the lack of long-range order in the third dimensionality. In this review, we survey the recent progress in fine structure characterization by X-ray absorption fine structure spectroscopy and also overview electronic structure modulation by density-functional calculations in the ultrathin two-dimensional crystals. In addition, we highlight their structure-property relationship, transparent and flexible device construction as well as wide applications in photoelectrochemical water splitting, photodetectors, thermoelectric conversion, touchless moisture sensing, supercapacitors and lithium ion batteries. Finally, we outline the major challenges and opportunities that face the atomically-thick two-dimensional crystals. It is anticipated that the present review will deepen people's understanding of this field and hence contribute to guide the future design of high-efficiency energy-related devices. © The Royal Society of Chemistry.

Interactions at plate boundaries induce stresses that constitute critical controls on the structural evolution of intraplate regions. However, the traditional tectonic model for the East Asian margin during the Mesozoic, invoking successive episodes of paleo-Pacific oceanic subduction, does not provide an adequate context for important Late Cretaceous dynamics across East Asia, including: continental-scale orogenic processes, significant sinistral strike-slip faulting, and several others. The integration of numerous documented field relations requires a new tectonic model, as proposed here. The Okhotomorsk continental block, currently residing below the Okhotsk Sea in Northeast Asia, was located in the interior of the Izanagi Plate before the Late Cretaceous. It moved northwestward with the Izanagi Plate and collided with the South China Block at about 100. Ma. The indentation of the Okhotomorsk Block within East Asia resulted in the formation of a sinistral strike-slip fault system in South China, formation of a dextral strike-slip fault system in North China, and regional northwest-southeast shortening and orogenic uplift in East Asia. Northeast-striking mountain belts over 500. km wide extended from Southeast China to Southwest Japan and South Korea. The peak metamorphism at about 89. Ma of the Sanbagawa high-pressure metamorphic belt in Southwest Japan was probably related to the continental subduction of the Okhotomorsk Block beneath the East Asian margin. Subsequently, the north-northwestward change of motion direction of the Izanagi Plate led to the northward movement of the Okhotomorsk Block along the East Asian margin, forming a significant sinistral continental transform boundary similar to the San Andreas fault system in California. Sanbagawa metamorphic rocks in Southwest Japan were rapidly exhumed through the several-kilometer wide ductile shear zone at the lower crust and upper mantle level. Accretionary complexes successively accumulated along the East Asian margin during the Jurassic-Early Cretaceous were subdivided into narrow and subparallel belts by the upper crustal strike-slip fault system. The departure of the Okhotomorsk Block from the northeast-striking Asian margin resulted in the occurrence of an extensional setting and formation of a wide magmatic belt to the west of the margin. In the Campanian, the block collided with the Siberian margin, in Northeast Asia. At about 77. Ma, a new oceanic subduction occurred to the south of the Okhotomorsk Block, ending its long-distance northward motion. Based on the new tectonic model, the abundant Late Archean to Early Proterozoic detrital zircons in the Cretaceous sandstones in Kamchatka, Southwest Japan, and Taiwan are interpreted to have been sourced from the Okhotomorsk Block basement which possibly formed during the Late Archean and Early Proterozoic. The new model suggests a rapidly northward-moving Okhotomorsk Block at an average speed of 22.5. cm/yr during 89-77. Ma. It is hypothesized that the Okhotomorsk-East Asia collision during 100-89. Ma slowed down the northwestward motion of the Izanagi Plate, while slab pull forces produced from the subducting Izanagi Plate beneath the Siberian margin redirected the plate from northwestward to north-northwestward motion at about 90-89. Ma. © 2013 Elsevier B.V.

Popov A.A.,Leibniz Institute for Solid State and Materials Research | Yang S.,Hefei University of Technology | Dunsch L.,Leibniz Institute for Solid State and Materials Research
Chemical Reviews | Year: 2013

One of the attractive properties of the hollow carbon clusters, known as fullerenes, is the possibility to use them as robust containers for other species. The field of chemical derivatization of EMFs has flourished in the past decade. Many cyclo- as well as radical addition reactions of EMFs are described forming a basis for the targeted synthesis of EMF-based functional materials. The a plications for EMFs as MRI contrasting agents and as electron-accepting blocks in photovoltaic devices are now considered as the most promising. Importantly, the reactivity and addition patterns of EMFs are significantly different from those of empty fullerenes. Advanced synthetic approaches and the progress in separation techniques dramatically improved the situation with availability of the EMF samples, which resulted in more dedicated and detailed studies of their structural, electronic, physical, and chemical properties. In the 1990s the field of the EMFs remained in the shadow of the empty fullerenes, which often resulted in the blind transfer of the guidelines, structural and chemical properties revealed for the empty fullerenes onto EMFs.

Zheng Y.-F.,Hefei University of Technology
Chemical Geology | Year: 2012

Chemical geodynamics is an integrated discipline that studies the geochemical structure and tectonic evolution of geospheres with the aim of linking tectonic processes to geochemical products in the Earth system. It was primarily focused on mantle geochemistry, with an emphasis on geochemical recycling in oceanic subduction zones. It has been extended to geochemical reworking and recycling under high-pressure (HP) to ultrahigh-pressure (UHP) conditions in all convergent plate margins. In particular, UHP terranes, along with UHP metamorphic minerals and rocks in continental subduction zones, represent natural laboratories for investigating geochemical transport and fluid action during subduction and exhumation of continental crust. As a result of this extension, the study of UHP terranes has significantly advanced our understanding of tectonic processes in collisional orogens. This understanding has principally benefited from the deciphering of petrological and geochemical records in deeply subducted crustal rocks that occur in different petrotectonic settings. This review focuses on the following issues in continental subduction zones: the time and duration of UHP metamorphism, the origin and action of metamorphic fluid/melt inside UHP slices, the element and isotope mobilities under HP to UHP conditions during continental collision, the origin of premetamorphic protoliths and its bearing on continental collision types, and the crustal detachment and crust-mantle interaction in subduction channels. The synthesis presented herein suggests that the nature of premetamorphic protoliths is a key to the type of collisional orogens and the size of UHP terranes. The source mixing in subduction channels is a basic mechanism responsible for the geochemical diversity of continental and oceanic basaltic rocks. Therefore, the geochemical study of HP to UHP metamorphic rocks and their derivatives has greatly facilitated our understanding of the geodynamic processes that drive the tectonic evolution of convergent plate margins from oceanic subduction to continental collision. Consequently, the study of chemical geodynamics has been developed from oceanic subduction zones to continental collision zones, and it has enabled important contributions to development of plate tectonic theory. © 2012 Elsevier B.V.

Xu J.S.,Hefei University of Technology
Nature communications | Year: 2010

It is well known that many operations in quantum information processing depend largely on a special kind of quantum correlation, that is, entanglement. However, there are also quantum tasks that display the quantum advantage without entanglement. Distinguishing classical and quantum correlations in quantum systems is therefore of both fundamental and practical importance. In consideration of the unavoidable interaction between correlated systems and the environment, understanding the dynamics of correlations would stimulate great interest. In this study, we investigate the dynamics of different kinds of bipartite correlations in an all-optical experimental setup. The sudden change in behaviour in the decay rates of correlations and their immunity against certain decoherences are shown. Moreover, quantum correlation is observed to be larger than classical correlation, which disproves the early conjecture that classical correlation is always greater than quantum correlation. Our observations may be important for quantum information processing.

Cui C.-H.,Hefei University of Technology | Yu S.-H.,Hefei University of Technology
Accounts of Chemical Research | Year: 2013

In order for fuel cells to have commercial viability as alternative fuel sources, researchers need to develop highly active and robust fuel cell electrocatalysts. In recent years, the focus has been on the design and synthesis of novel catalytic materials with controlled interface and surface structures. Another goal is to uncover potential catalytic activity and selectivity, as well as understand their fundamental catalytic mechanisms. Scientists have achieved great progress in the experimental and theoretical investigation due to the urgent demand for broad commercialization of fuel cells in automotive applications. However, there are still three main problems: cost, performance, and stability. To meet these targets, the catalyst needs to have multisynergic functions. In addition, the composition and structure changes of the catalysts during the reactions still need to be explored.Activity in catalytic nanomaterials is generally controlled by the size, shape, composition, and interface and surface engineering. As such, one-dimensional nanostructures such as nanowires and nanotubes are of special interest. However, these structures tend to lose the nanoparticle morphology and inhibit the use of catalysts in both fuel cell anodes and cathodes. In 2003, Rubinstein and co-workers proposed the idea of nanoparticle nanotubes (NNs), which combine the geometry of nanotubes and the morphology of nanoparticles. This concept gives both the high surface-to-volume ratio and the size effect, which are both appealing in electrocatalyst design.In this Account, we describe our developments in the construction of highly active NNs with unique surface and heterogeneous interface structures. We try to clarify enhanced activity and stability in catalytic systems by taking into account the activity impact factors. We briefly introduce material structural effects on the electrocatalytic reactivity including metal oxide/metal and metal/metal interfaces, dealloyed pure Pt, and mixed Pt/Pd surfaces. In addition, we discuss the geometric structure and surface composition changes and evolutions on the activity, selectivity, and stability under fuel cell operation conditions. We expect that these nanostructured materials with particular nanostructured characteristics, physical and chemical properties, and remarkable structure changes will offer new opportunities for wide scientific communities. © 2013 American Chemical Society.

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