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Chinese Journal of Polymer Science 2014年第4期32卷 449-457页

作者： S.Rafiei B.Noroozi sh.Arbab A.k.Haghi Department of Textile Engineering University of Guilan

Polyacrylonitrile （pan） nanofibers with average diameter of 300 nm were produced by electro-spinning. The nanofibers were stabilized at different temperatures in the range of 180-270 ℃in several duration times and heating rates. Fourier transforms infrared （FTIR） spectroscopy, differential scanning calorimetry （DSC） and X-ray diffraction （XRD） analyzing techniques were employed to measure the extent of stabilization reaction. By all procedures, the ranges of temperature and duration time recommended were about 250-270 ℃ and 1-2 h, respectively. Increasing the activation temperature from 800 ℃ to 1200 ℃ caused porosity and pore volume development up to 60% and 0.532 cm3/g, respectively. Pore width of all samples was calculated to be about 0.7 nm confirming micro-pore structure of the produced pan based activated carbon nanofibers. Comparing dye adsorption for different adsorbents including chitin and granular activated carbon （GAC） showed the highest efficiency for the produced activated carbon nanofibers （ACNFs）.

关键词： Polyacrylonitrile Electro-spinning Stabilization Activated carbon nanofibers Adsorbent.

A CASE FOR SUSTAINABLE SECURITY SYSTEMS ENGINEERING:INTEGRATING NATIONAL,HUman,ENERGY AND ENVIRONMENTAL SECURITY

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Journal of Systems Science and Systems Engineering 2009年第4期18卷 385-402页

作者： Jason k. LEVY L. Douglas Wilder School of Government and Public Affairs Virginia Commonwealth University

In the wak. of the September 11,2001 terrorist attack., there is a growing sense of insecurity felt by many citizens around the world. Sustainable security, with roots in the sustainable development and human security literature, seek. positive transformations for the co-evolving and mutually dependent human-environmental condition by integrating （and subsuming） national, human, environmental, and energy security concems and capitalizing on opportunities provided by human creativity, diplomatic openings, modernization and environmental change. The field of Sustainable Security Systems Engineering is proposed for protecting, restoring, designing, and implementing a set of integrated natural and man-made processes that equitably and responsibly meet the biophysical needs of human communities, while maintaining long-term security, respecting financial constraints, meeting ecological limits, and improving institutional arrangements for transparent and effective governance. Scenario planning is shown to help promote sustainable security by identifying the preconditions of instability and helping to proactively address them in an increasingly complex and uncertain world. The six papers published in this featured collection cross policy domains, geographic, political, and sectoral boundaries and were discussed at forums sponsored by the Systems Engineering and Global Policy group. Collectively, they demonstrate the quality, breadth and depth of systems engineering methodologies that are used to promote sustainable security.

关键词： Sustainable security systems engineering national security human security environment and energy scenario planning

Relativistic atomic data for W XLVⅡ

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Chinese Physics B 2015年第5期24卷 305-312页

作者： Sunny Aggarwal A.k.S.Jha Indu k.atri Narendra Singh man Mohan Department of Physics and Astrophysics University of Delhi Department of Physics Shyamlal College University of Delhi

Energy levels, radiative rates, and lifetimes are calculated for all levels of 3s23p, 3s23d, 3s3p2, 3s3d2, 3s3p3d, 3p23d, 3s3d2, 3p3d2, 3p3, and 3d3 configurations of Al-lik. tungsten ion （W XLVII）. Multiconfigurational Dirac-Fock.（MCDF） method is adopted for calculating energy levels and radiative rates. Oscillator strengths, radiative rates, and line strengths are reported for some E1 transitions from the ground level. Comparisons are made with the available data in the literature and good agreement has been found which confirms the reliability of our results.

关键词： atomic data multiconfigurational Dirac-Fock.method transition probability

Formation of TiN Grid on NiTi by Laser Gas Nitriding for Improving Wear Resistance in Hank.' Solution

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Journal of Materials Science & Technology 2016年第5期32卷 459-464页

作者： C.H.Ng O.k.Chan H.C.man Department of Industrial and Systems Engineering The Hong Kong Polytechnic University

Laser gas nitriding （LGN） is a common surface modification method to enhance the wear resistance of titanium （Ti） alloys, which are k.own to have poor tribological properties. In the present study, a titanium nitride （TIN） grid network.was fabricated on the surface of nick.l titanium （NiTi） by LGN. The laser processing parameters were selected to achieve nitriding without surface melting and hence to＇maintain a smooth surface finish. The characteristics of the grid-nitrided samples were investigated by scanningelectron microscopy, X-ray diffractometry, optical microscopy, 2-D profilometry, contact angle measurements and nanoindentation. The wear resistance of the nitrided samples was evaluated using reciprocating wear test against ultra-high-molecular-weight polyethylene （UHMWPE） in Hank.＇ solution. The results indicate that the wear rates of the grid-nitrided samples and the UHMWPE counter-body in the wear pair are both significantly reduced. The decrease in wear rates can be attributed to the combination of a hard TiN grid and a soft NiTi substrate. In Hank.＇ solution, the higher hydrophilicity of the nitrided samples also contributes to the better performance in wear test against hydrophobic UHMWPE.

关键词： Laser Nitriding Surface patterning Titanium alloys Wear

Synchronous Synthesis of Polymeric Vesicles with Controllable Size and Low-Polydispersity by Polymerization-Induced Self-Assembly

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Chinese Journal of Chemistry 2022年第4期40卷 453-459页

作者： Ren-man Zhu Cheng-Lin Yang Zi-Xuan Chang Cai-Yuan pan Wen-Jian Zhang Chun-Yan Hong CAS k.y Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui 230026China Institute of Physical Science and Information Technology Anhui UniversityHefeiAnhui 230601China

Comprehensive Summary The size and size distribution of polymeric nanoparticles have great impact on their physicochemical and biological ***-induced self-assembly(PISA)has been demonstrated to be an efficient method to fabricate various polymeric nanoparticles,among which polymeric vesicles have attracted great interest due to their unique hollow structure.

关键词： Polymerization-induced self-assembly RAFT dispersion polymerization Vesicles Block.copolymers Nanoparticles

Hydrogen isotopic replacement and microstructure evolution in zirconium deuteride implanted by 150 k.V protons

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Chinese Physics B 2021年第10期30卷 85-91页

作者： man Zhao Mingxu Zhang Tao Wang Jiangtao Zhao pan Dong Zhen Yang Tieshan Wang School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China Institute of Fluid Physics CAEPMianyang 621900China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China

Zirconium tritiated(ZrTx)is an alternative target material for deuteron-triton(D-T)reaction neutron *** isotopic replacement and microstructure evolution induced by hydrogen isotope implantation could significantly affect the performance of the target *** this work.the zirconium deuteride film deposited on Mo/Si substrate was implanted by 150 k.V protons with fluence from 1×10^(16 ) to 1×10^(18 )protons/cm^(2).After implantation,the depth profiles of retained hydrogen(H)and deuterium(D)in these target films were analyzed by elastic recoil detection analysis(ERDA),and time of flight-secondary ion mass spectrometry(ToF-SIMS).Additionally,the microstructure evolution was also observed by x-ray diffraction(XRD)and scanning electron microscope(SEM).The D concentration in the ZrDx film decreased versus the proton implantation *** analytical model was proposed to describe the hydrogen isotopic trapping and exchange as functions of incident protons ***,the XRD analysis revealed that no new phase was formed after proton ***,circular flak.ngs were observed on the ZrDx surface from SEM images at fluence up to 1×10^(18) protons/cm^(2),and this surface morphology was considered to associate with the hydrogen atoms congregation in Mo/Si boundary.

关键词： zirconium deuterides isotopic replacement proton implantation microstructure evolution

Study of thermoelectric enhanced SERS and photocatalysis with ZnO-metal nanorod arrays

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Nano Research 2023年第4期16卷 5427-5435页

作者： Baoqiang Du Jibing Tan Chang Ji Mingrui shao Xiaofei Zhao Jing Yu Chao Zhang Chuansong Chen Hui pan Baoyuan man Zhen Li School of Physics and Electronics Collaborative Innovation Center of Light Manipulations and ApplicationsShandong Normal UniversityJinan 250014China Institute of Applied Physics and Materials Engineering University of MacaoMacao 999078China

Herein,a thermoelectric induced surface-enhanced Raman scattering(SERS)substrate consisting of ZnO nanorod arrays and metal nanoparticles is *** intensities of SERS signals are further enhanced by an order of magnitude and the limit of detection(LOD)for the molecules is reduced by at least one order of magnitude after the application of a thermoelectric *** enhancement mechanism is analyzed carefully and thoroughly based on the experimental and theoretical results,thus proving that the thermoelectric-induced enhancement of the SERS signals should be classified as a chemical ***,it is proved that the electric regulation mechanism is universally applicable,and the fabricated substrate realizes enormous enhancements for various types of molecules,such as rhodamine 6G,methyl orange,crystal violet,amaranth,and biological ***,the proposed electric-induced SERS(E-SERS)substrate is also realized to monitor and manipulate the plasmon-activated redox *** believe that this study can promote the course of the research on ESERS and plasmon-enhanced photocatalysts.

关键词： ZnO electric-induced surface-enhanced Raman scattering(E-SERS) temperature gradient photocatalysis local surface plasmon resonance(LSPR)

A review on MBE-grown HgCdSe infrared materials on GaSb(211)B substrates

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Chinese Physics B 2019年第1期28卷 116-125页

作者： Z k.Zhang W W pan J L Liu W Lei Department of Electrical Electronic and Computer EngineeringThe University of Western Australia35 Stirling HighwayCrawley 6009Australia

We review our recent efforts on developing HgCdSe infrared materials on Ga Sb substrates via molecular beam epitaxy(MBE) for fabricating next generation infrared detectors with features of lower production cost and larger focal plane array format size. In order to achieve high-quality HgCdSe epilayers, ZnTe buffer layers are grown before growing HgCdSe, and the study of misfit strain in ZnTe buffer layers shows that the thick.ess of ZnTe buffer layer needs to be below 300 nm in order to minimize the generation of misfit dislocations. The cut-off wavelength/alloy composition of HgCdSe materials can be varied in a wide range by varying the ratio of Se/Cd beam equivalent pressure during the HgCdSe *** temperature presents significant impact on the material quality of HgCdSe, and lower growth temperature leads to higher material quality for HgCdSe. Typically, long-wave infrared HgCdSe(x = 0.18, cut-off wavelength of 10.4 μm at 80 k. presents an electron mobility as high as 1.3×10~5cm^2·V^(-1)·s^(-1), a back.round electron concentration as low as 1.6×10^(16)cm^(-3), and a minority carrier lifetime as long as 2.2 μs. These values of electron mobility and minority carrier lifetime represent a significant improvement on previous studies of MBE-grown HgCdSe reported in the open literatures,and are comparable to those of counterpart HgCdTe materials grown on lattice-matched CdZnTe substrates. These results indicate that HgCdSe grown at the University of Western Australia, especially long-wave infrared can meet the basic material quality requirements for mak.ng high performance infrared detectors although further effort is required to control the back.round electron concentration to below 10^(15)cm^(-3). More importantly, even higher quality HgCdSe materials on GaSb are expected by further optimizing the growth conditions, using higher purity Se source material, and implementing postgrowth thermal annealing and defect/impurity gettering/filtering. Our results demonst

关键词： infrared detector HgCdSe GaSb molecular beam epitaxy

Automated diagnosis and staging of Fuchs’endothelial cell corneal dystrophy using deep learning

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eye and Vision 2020年第2期7卷 423-433页

作者： Taher Eleiwa Amr Elsawy eyüpÖzcan Mohamed Abou shousha Bascom Palmer eye Institute Miller School of MedicineUniversity of MiamiMiamiFlorida 33136USA Department of Ophthalmology Faculty of MedicineBenha UniversityBenhaEgypt Electrical and Computer Engineering University of MiamiCoral GablesFloridaUSA Net eye Medical Center GaziantepTurkey Biomedical Engineering University of MiamiCoral GablesFloridaUSA

Back.round:To describe the diagnostic performance of a deep learning algorithm in discriminating early-stage Fuchs’endothelial corneal dystrophy(FECD)without clinically evident corneal edema from healthy and late-stage FECD eyes using high-definition optical coherence tomography(HD-OCT).Methods:In this observational case-control study,104 eyes(53 FECD eyes and 51 healthy controls)received HDOCT imaging(Envisu R2210,Bioptigen,Buffalo Grove,IL,USA)using a 6 mm radial scan pattern centered on the corneal *** was clinically categorized into early(without corneal edema)and late-stage(with corneal edema).A total of 18,720 anterior segment optical coherence tomography(AS-OCT)images(9180 healthy;5400 early-stage FECD;4140 late-stage FECD)of 104 eyes(81 patients)were used to develop and validate a deep learning classification network.to differentiate early-stage FECD eyes from healthy eyes and those with clinical *** 5-fold cross-validation on the dataset containing 11,340 OCT images(63 eyes),the network.was trained with 80%of these images(3420 healthy;3060 early-stage FECD;2700 late-stage FECD),then tested with 20%(720 healthy;720 early-stage FECD;720 late-stage FECD).Thereafter,a final model was trained with the entire dataset consisting the 11,340 images and validated with a remaining 7380 images of unseen AS-OCT scans of 41 eyes(5040 healthy;1620 early-stage FECD 720 late-stage FECD).Visualization of learned features was done,and area under curve(AUC),specificity,and sensitivity of the prediction outputs for healthy,early and late-stage FECD were ***:The final model achieved an AUC of 0.997±0.005 with 91%sensitivity and 97%specificity in detecting early-FECD;an AUC of 0.974±0.005 with a specificity of 92%and a sensitivity up to 100%in detecting late-stage FECD;and an AUC of 0.998±0.001 with a specificity 98%and a sensitivity of 99%in discriminating healthy corneas from all ***:Deep learning algorithm is an accurate autonomous nove

关键词： Optical coherence tomography Descemet’s membrane Corneal endothelium Fuchs endothelial dystrophy

Real-time monitoring flexible hydrogels based on dual physically cross-link.d network.for promoting wound healing

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Chinese Chemical Letters 2023年第10期34卷 229-235页

作者： Le Hu Yuxin Wang Qing Liu man Liu Faming Yang Chunxiao Wang panpan pan Lin Wang Li Chen Jingdi Chen Marine College Shandong UniversityWeihai 264209China shandong Laboratory of Advanced Materials and Green manufacturing Yantai 265599China College of Biological Science and Technology Fuzhou UniversityFuzhou 350108China

To achieve smart and personalized medicine, the development of hydrogel dressings with sensing properties and biotherapeutic properties that can act as a sensor to monitor of human health in real-time while speeding up wound healing face great challenge. In the present study, a biocompatible dual-network.composite hydrogel(DNCGel) sensor was obtained via a simple process. The dual network.hydrogel is constructed by the interpenetration of a flexible network.formed of poly(vinyl alcohol)(PVA) physical cross-link.d by repeated freeze-thawing and a rigid network.of iron-chelated xanthan gum(XG) impregnated with Fe^(3+) interpenetration. The pure PVA/XG hydrogels were chelated with ferric ions by immersion to improve the gel strength(compressive modulus and tensile modulus can reach up to 0.62 MPa and0.079 MPa, respectively), conductivity(conductivity values ranging from 9 × 10^(-4) S/cm to 1 × 10^(-3)S/cm)and bacterial inhibition properties(up to 98.56%). Subsequently, the effects of the ratio of PVA and XG and the immersion time of Fe^(3+) on the hydrogels were investigated, and DNGel3 was given the most priority on a comprehensive consideration. It was demonstrated that the DNCGel exhibit good biocompatibility in vitro, effectively facilitate wound healing in vivo(up to 97.8% healing rate) under electrical stimulation, and monitors human movement in real time. This work.provides a novel avenue to explore multifunctional intelligent hydrogels that hold great promise in biomedical fields such as smart wound dressings and flexible wearable sensors.

关键词： Conductive hydrogel Dual cross-link.d network Antimicrobial activity Real-time monitorin Wound healing