Harbin Engineering University

Harbin, China

Harbin Engineering University , also referred to as HEU, was founded in 1953 in Harbin, China. It offers over 150 degree programs, 48 of which are conducted in English. Designated a Project 211 university, HEU is billed as a top institution for engineering and marine projects. Wikipedia.

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Gato C.,Harbin Engineering University
Applied Mathematical Modelling | Year: 2010

Detonation-driven fracture of thin structures is studied numerically by a 3D discrete crack meshfree method. These types of failure mechanisms play an important role in pipes and vessels. I therefore proposed a three-dimensional meshfree method and an efficient discrete crack model to describe crack propagation. The method is based on separation of particles similar to the visibility method but its implementation is more efficient. I assume here through-thickness cracks though the method can be extended to crack growth in arbitrary directions. The load is applied as travelling pressure wave obtained from pure fluid simulation in accordance with experimental measurements. Numerical results to experimental data show good agreement. © 2010 Elsevier Inc.

In Shu and Lin, 2011, exponential time (actually polynomial space) algorithms for determining the weak detectability and weak periodic detectability of nondeterministic discrete event systems (DESs) are designed. In this paper, we prove that the problems of determining the weak detectability and weak periodic detectability of deterministic DESs are both PSPACE-hard (hence PSPACE-complete). Then as corollaries, the problems of determining the weak detectability and weak periodic detectability of nondeterministic DESs are also PSPACE-hard (hence PSPACE-complete). © 2017 Elsevier Ltd

Agency: GTR | Branch: EPSRC | Program: | Phase: Research Grant | Award Amount: 78.85K | Year: 2014

This project aims to develop a framework that will integrate data collected and recorded through a Structural Health Monitoring (SHM) system for marine energy converters, in order to estimate reliability levels at component and system level in real time and evaluate its ability to further fulfil its intended function. Obtaining a more well-informed understanding of the actual state of the system, alternative operational strategies can be adopted, particularly taking into consideration its residual capacity after extreme environmental events, optimizing its inspection and maintenance scheduling and hence reducing the OPEX. Application of the developed framework on an existing prototype wave device, already developed by the Chinese partners, will allow its validation and extension to future applications. This reference case will be employed in order to classify its components and determine potential failure modes and limit states to assess failure. From the key failure mechanisms that will be identified, arrangements for Structural Health Monitoring will be proposed obtaining data from relevant measurements (ie strains and accelerations) that can then inform the reliability evaluation in real time, updating its operational strategy, particularly taking into consideration residual capacity after extreme environmental events. Outcome of the project will be a generic framework applicable to a range of marine energy devices.

Zhang C.,CAS Institute of Chemistry | Chen C.,Harbin Engineering University | Dong H.,Harbin Engineering University | Shen J.-R.,Okayama University | And 2 more authors.
Science | Year: 2015

Photosynthetic splitting of water into oxygen by plants, algae, and cyanobacteria is catalyzed by the oxygen-evolving center (OEC). Synthetic mimics of the OEC, which is composed of an asymmetric manganese-calcium-oxygen cluster bound to protein groups, may promote insight into the structural and chemical determinants of biological water oxidation and lead to development of superior catalysts for artificial photosynthesis. We synthesized a Mn4Ca-cluster similar to the native OEC in both the metal-oxygen core and the binding protein groups. Like the native OEC, the synthetic cluster can undergo four redox transitions and shows two magnetic resonance signals assignable to redox and structural isomerism. Comparison with previously synthesized Mn3CaO4-cubane clusters suggests that the fourth Mn ion determines redox potentials and magnetic properties of the native OEC.

Gai S.,CAS Changchun Institute of Applied Chemistry | Gai S.,Harbin Engineering University | Li C.,CAS Changchun Institute of Applied Chemistry | Yang P.,Harbin Engineering University | Lin J.,CAS Changchun Institute of Applied Chemistry
Chemical Reviews | Year: 2014

The recent progress on several soft chemical routes for the controlled synthesis of rare earth (RE) inorganic nano/microcrystals is reviewed. On the basis of the mechanism of luminescence, RE luminescence can be divided into down-conversion (DC) and up-conversion (UC) emission processes. In the light of DC and UC processes, two categories of RE phosphors can be obtained, DC phosphors and UC phosphors, which usually can be distinguished by the sorts of doped Ln3+ ions. Due to the various combinations of RE3+ ions for DC multicolor emissions, there are three doping systems for DC white light emissions, including monodoped, codoped, and tridoped materials. For these materials, the emission lines of each couple of doping ions will cover blue region and yellow region, respectively, and the emission intensities are comparable, resulting in white light emissions. A better understanding of the synthetic methodology will promote the systematic design of synthetic strategies and then direct us to produce nano/microcrystals with predesigned structures.

Yang P.,CAS Changchun Institute of Applied Chemistry | Yang P.,Harbin Engineering University | Gai S.,Harbin Engineering University | Lin J.,CAS Changchun Institute of Applied Chemistry
Chemical Society Reviews | Year: 2012

In the past decade, non-invasive and biocompatible mesoporous silica materials as efficient drug delivery systems have attracted special attention. Great progress in structure control and functionalization (magnetism and luminescence) design has been achieved for biotechnological and biomedical applications. This review highlights the most recent research progress on silica-based controlled drug delivery systems, including: (i) pure mesoporous silica sustained-release systems, (ii) magnetism and/or luminescence functionalized mesoporous silica systems which integrate targeting and tracking abilities of drug molecules, and (iii) stimuli-responsive controlled release systems which are able to respond to environmental changes, such as pH, redox potential, temperature, photoirradiation, and biomolecules. Although encouraging and potential developments have been achieved, design and mass production of novel multifunctional carriers, some practical biological application, such as biodistribution, the acute and chronic toxicities, long-term stability, circulation properties and targeting efficacy in vivo are still challenging. © The Royal Society of Chemistry 2012.

Jiang L.,Harbin Engineering University | Fan Z.,Harbin Engineering University
Nanoscale | Year: 2014

In order to make full utilization of the high intrinsic surface area of graphene, recently, porous graphene materials including graphene nanomesh, crumpled graphene and graphene foam, have attracted tremendous attention and research interest, owing to their exceptional porous structure (high surface area, and high pore volume) in combination with the inherent properties of graphene, such as high electronic conductivity, good thermal stability, and excellent mechanical strength. Interestingly, porous graphene materials and their derivatives have been explored in a wide range of applications in the fields of electronic and photonic devices, energy storage, gas separation/storage, oil absorption and sensors. This article reviews recent progress in the synthesis, characterization, properties, and applications of porous graphene materials. We aim to highlight the importance of designing different porous structures of graphene to meet future challenges, and the trend on future design of porous graphene materials is analyzed. © 2014 The Royal Society of Chemistry.

Zhou B.,Harbin Engineering University
Mechanics of Materials | Year: 2012

This paper presents a macroscopic constitutive model which is able to reproduce the thermo-mechanical behaviors of the super-elastic SMA undergoing plastic strain. A mechanical constitutive equation, which predicts the stress-strain response of the SMA undergoing plastic strain, is developed based on the expression of Gibbs free energy with plastic strain. A linear plastic constraint equation is supposed to describe the effect of plasticity on the phase transformation behaviors of SMA. A sine-type phase transformation equation is established to describe the phase transformation behaviors of the SMA undergoing plastic strain. The mechanical constitutive equation, plastic constraint equation, and phase transformation equation together compose the presented macroscopic constitutive model which reproduces the thermo-mechanical behaviors of the SMA undergoing plastic strain. Especially all material constants related to the presented macroscopic constitutive model can be determined through macroscopic experiments. Therefore it is easy to use this presented model for the practical applications of SMA. The mechanical behaviors of the supper-elastic SMA undergoing plastic strain and the effect of plasticity are numerically simulated by the presented macroscopic constitutive model. Results show that the presented macroscopic constitutive model can effectively reproduce the thermo-mechanical behaviors of the super-elastic SMA and express the effect of plasticity. © 2012 Elsevier Ltd. All rights reserved.

Yan J.,Harbin Engineering University | Wang Q.,Harbin Engineering University | Wei T.,Harbin Engineering University | Fan Z.,Harbin Engineering University
Advanced Energy Materials | Year: 2014

In recent years, tremendous research effort has been aimed at increasing the energy density of supercapacitors without sacrificing high power capability so that they reach the levels achieved in batteries and at lowering fabrication costs. For this purpose, two important problems have to be solved: first, it is critical to develop ways to design high performance electrode materials for supercapacitors; second, it is necessary to achieve controllably assembled supercapacitor types (such as symmetric capacitors including double-layer and pseudo-capacitors, asymmetric capacitors, and Li-ion capacitors). The explosive growth of research in this field makes this review timely. Recent progress in the research and development of high performance electrode materials and high-energy supercapacitors is summarized. Several key issues for improving the energy densities of supercapacitors and some mutual relationships among various effecting parameters are reviewed, and challenges and perspectives in this exciting field are also discussed. This provides fundamental insight into supercapacitors and offers an important guideline for future design of advanced next-generation supercapacitors for industrial and consumer applications. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Harbin Engineering University | Date: 2016-03-09

A multiple optical channel autocorrelator based on an optical fiber circulator includes a broad-band light source, at least an optical-fiber sensor array, an adjustable multiple light beams generator, at least an optical fiber circulator and at least a photoelectric detector. The optical-fiber sensor array is composed of the sensing fibers connected end to end. The in line mirrors are formed by the connecting end faces of the adjacent fibers. The adjustable multiple light beams generator includes a fixed arm and an adjustable arm. The optical path difference between the fixed arm and the adjustable arm is adjustable in order to match the optical path of each sensor in the sensor array. The optical fiber circulator couples the signals generated by the multiple light beams generator to the sensor array, and couples the signals returned by the sensor array to the photoelectric detector. The photoelectric detector is connected to the optical fiber circulator. The multiple optical channel autocorrelator based on the optical fiber circulator can implement the real-time in line measurement of the physical quantity of multipoint strain or deformation, and has advantages of low light source power loss, high efficiency and good stability.

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