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| 1 | Structural characteristic and formation mechanism of hemihydrate calcium sulfate whiskers prepared using FGD gypsum显示文摘Hemihydrate calcium sulfate whiskers(HH-CSWs)were hydrothermally synthesized in a sulfuric acid solution at 120℃ for different holding times(20,40,and 60 min).The phase structures and morphologies were characterized by XRD and SEM,respectively.The XRD pattern of the sample under 60 min was refined via the Rietveld fitting method.The structure models of the HH-CSW sample under a 60-min holding time was established based on Rietveld fitting results.No difference in the positions of diffraction peaks was determined.The as-prepared holding time increased the intensity and aspect ratio of the diffraction peaks of both samples.In the prepared HH-CSW structure,Ca-O polyhedron is a 12-sided polyhedron similar to that in the gypsum structure;the Ca atom is located in two positions in the one-unit cell;the H_(2)O channel along the c-axis similar is O-shaped and bigger than that in hexagonal and monoclinic CaSO_(4)·0.5H_(2)O structures.Therefore,although the prepared HH-CSW crystals’structure are similar to that of the reported hexagonal and monoclinic CaSO_(4)·0.5H_(2)O structures,they are not the same.The formation mechanism of HH-CSW from flue gas desulfurization(FGD)gypsum is discussed based on the analysis of gypsum structure. | Xiaoting Zhang Lingwei Ran Xiao Wang Biao Jin Jianwu Zhang Shanying Li Liushuan Yang | 2022 | Particuology2022，20，3： | 7 |
| 2 | Outstanding Humidity Chemiresistors Based on Imine-Linked Covalent Organic Framework Films for Human Respiration Monitoring显示文摘Human metabolite moisture detection is important in health monitoring and non-invasive diagnosis.However,ultra-sensitive quantitative extraction of respiration information in real-time remains a great challenge.Herein,chemiresistors based on imine-linked covalent organic framework(COF)films with dual-active sites are fabricated to address this issue,which demonstrates an amplified humidity-sensing signal performance.By regulation of monomers and functional groups,these COF films can be pre-engineered to achieve high response,wide detection range,fast response,and recovery time.Under the condition of relative humidity ranging from 13 to 98%,the COFTAPB-DHTA film-based humidity sensor exhibits outstanding humidity sensing perfor-mance with an expanded response value of 390 times.Furthermore,the response values of the COF film-based sensor are highly linear to the relative humidity in the range below 60%,reflecting a quantitative sensing mechanism at the molecular level.Based on the dual-site adsorption of the(-C=N-)and(C-N)stretching vibrations,the revers-ible tautomerism induced by hydrogen bonding with water molecules is demonstrated to be the main intrinsic mechanism for this effective humidity detection.In addition,the synthesized COF films can be further exploited to effectively detect human nasal and oral breathing as well as fabric permeability,which will inspire novel designs for effective humidity-detection devices. | Xiyu Chen Lingwei Kong Jaafar Abdul-Aziz Mehrez Chao Fan Wenjing Quan Yongwei Zhang Min Zeng Jianhua Yang Nantao Hu Yanjie Su Hao Wei Zhi Yang | 2023 | Nano-Micro Letters2023，15，9： | 2 |
| 3 | CT radiomics can help screen the coronavirus disease2019(COVID-19): a preliminary study显示文摘The coronavirus disease 2019(COVID-19) is raging across the world.The radiomics,which explores huge amounts of features from medical image for disease diagnosis,may help the screen of the COVID-19.In this study,we aim to develop a radiomic signature to screen COVID-19 from CT images.We retrospectively collect 75 pneumonia patients from Beijing Youan Hospital,including 46 patients with COVID-19 and 29 other types of pneumonias.These patients are divided into training set(n = 50) and test set(n = 25) at random.We segment the lung lesions from the CT images,and extract 77 radiomic features from the lesions.Then unsupervised consensus clustering and multiple cross-validation are utilized to select the key features that are associated with the COVID-19.In the experiments,while twenty-three radiomic features are found to be highly associated with COVID-19,four key features are screened and used as the inputs of support vector machine to build the radiomic signature.We use area under the receiver operating characteristic curve(AUC) and calibration curve to assess the performance of our model.It yields AUCs of 0.862 and 0.826 in the training set and the test set respectively.We also perform the stratified analysis and find that its predictive ability is not affected by gender,age,chronic disease and degree of severity.In conclusion,we investigate the value of radiomics in screening COVID-19,and the experimental results suggest the radiomic signature could be a potential tool for diagnosis of COVID-19. | Mengjie FANG Bingxi HE Li LI Di DONG Xin YANG Cong LI Lingwei MENG Lianzhen ZHONG Hailin LI Hongjun LI Jie TIAN | 2020 | Science China(Information Sciences)2020，63，7： | 2 |
| 4 | Comparison of ablative and compressive mechanical behavior of several PICA-like ablative materials显示文摘It is significant to compare the ablative and compressive mechanical behavior of different PICA-like materials in the engineering applications.The plasma wind tunnel ablation tests with high-entropy air and CO2 atmospheres,and compressive experiments in the ambient and 150℃,were conducted for three kinds of PICA-like materials(CF/PR-Si,CBCF/PR-SiOC and NQF/PR-Si composites).The traditional carbon/phenolic(C/PR)braided composites were also used for comparison.PICA-like materials have the better thermal insulation than traditional C/PR composite,especially for CBCF/PR-SiOC composite.The ablation behavior of CF/PR-Si and CBCF/PR-SiOC PICA-like materials in the CO2 atmosphere can produce a large amount of SiO2 in the form of coatings,oxide layers and skeletons on the ablated surface,which are greatly different from that in the air atmosphere.The compressive behavior of PICA-like material is greatly depended on the fiber fabrics,and exhibits the large discrete characteristics.The longer fiber in the PICA-like materials plays the role in maintaining the material integrity,while it may increase the thermal conductivity. | ZHANG Jun FANG GuoDong YANG LingWei LI Wei HONG ChangQing MENG SongHe | 2020 | Science China(Technological Sciences)2020，63，8： | 2 |
| 5 | Neuromorphic sensory computing显示文摘The number of sensory nodes in the Internet of everything continues to increase rapidly and generate massive data.The generated information from sensory nodes is much larger than the total collective human sensory throughput.It is quite challenging to send all of the data produced at sensory terminals to the“Cloud”computation center,especially for those time-delay sensitive applications.This situation demands a dramatic increase in the computation near or inside sensory networks.Inspired by biological sensory systems with a high data compression ratio,neuromorphic sensory computing provides a way to efficiently acquire and process a large volume of data from complex environments.Researchers have been investigating emerging materials,devices,circuits,and computing architectures to implement an artificial sensory system with high energy efficiency,speed,and density.Here we summarize the important features of biological systems and their hardware implementations.Electrons and photons are two representative information carriers,in which electron carrier allows high integration density for complex computing and photon carrier has high connectivity,high speed,wide bandwidth,and low power consumption.We overview the electronic and optical neuromorphic sensory computing and hybrid opto-electronic sensory computing,and present advances on multimodal sensory computing and their potential challenges. | Tianqing WAN Sijie MA Fuyou LIAO Lingwei FAN Yang CHAI | 2022 | Science China(Information Sciences)2022，65，4： | 2 |
| 6 | Vis-coelastic rheological property comparison on differenttypes of polymer solutions for enhanced oil recovery 显示文摘 | MENG Lingwei KANG Wanli ZHOU Yang | 2008 | J Cen South Univ Technol2008，，： | 1 |
| 7 | Effect of furan π-bridge on the photovoltaic performance of D-A copolymers based on bi(alkylthio-thienyl)benzodithiophene and fluorobenzotriazole显示文摘The medium band gap donor-acceptor(D-A) copolymer J61 based on bi(alkylthio-thienyl)benzodithiophene as donor unit and fluorobenzotriazole as acceptor unit and thiophene as π-bridge has demonstrated excellent photovoltaic performance as donor material in nonfullerene polymer solar cells(PSCs) with narrow bandgap n-type organic semiconductor ITIC as acceptor.For studying the effect of π-bridges on the photovoltaic performance of the D-A copolymers,here we synthesized a new D-A copolymer J61-F based on the same donor and acceptor units as J61 but with furan π-bridges instead of thiophene.J61-F possesses a deeper the highest occupied molecular orbital(HOMO) level at-5.45 eV in comparison with that(-5.32 eV) of J61.The non-fullerene PSCs based on J61-F:ITIC exhibited a maximum power conversion efficiency(PCE) of 8.24%with a higher open-circuit voltage(V_(oc)) of 0.95 V,which is benefitted from the lower-lying HOMO energy level of J61-F donor material.The results indicate that main chain engineering by changing π-bridges is another effective way to tune the electronic energy levels of the conjugated D-A copolymers for the application as donor materials in non-fullerene PSCs. | Tinghai Yan Haijun Bin Yankang Yang Lingwei Xue Zhi-Guo Zhang Yongfang Li | 2017 | Science China Chemistry2017，60，4： | 1 |
| 8 | Dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas显示文摘This work employed an inductively coupled plasma wind tunnel to study the dynamic oxidation mechanisms of carbon fiber reinforced SiC matrix composite(C_(f)/SiC)in high-enthalpy and high-speed plasmas.The results highlighted a transition of passive/active oxidations of SiC at 800–1600℃and 1–5 kPa.Specially,the active oxidation led to the corrosion of the SiC coating and interruption of the SiO_(2) growth.The transition borders of active/passive oxidations were thus defined with respect to oxidation temperature and partial pressure of atomic O in the high-enthalpy and high-speed plasmas.In the transition and passive domains,the SiC dissipation was negligible.By multiple dynamic oxidations of C_(f)/SiC in the domains,the SiO_(2) thickness was not monotonously increased due to the competing mechanisms of passive oxidation of SiC and dissipation of SiO_(2).In addition,the mechanical properties of the SiC coating/matrix and the C_(f)/SiC were maintained after long-term dynamic oxidations,which suggested an excellent thermal stability of C_(f)/SiC serving in thermal protection systems(TPSs)of reusable hypersonic vehicles. | Lingwei YANG Xueren XIAO Liping LIU Jie LUO Kai JIANG Xinxing HAN Changhao ZHAO Jun ZHANG Guolin WANG | 2022 | Journal of Advanced Ceramics2022，11，2： | 1 |
| 9 | Alkoxy substituted benzodithiophene-alt-fluorobenzotriazole copolymer as donor in non-fullerene polymer solar cells显示文摘A new benzodithiophene(BDT)-alt-fluorobenzotriazole(FBTA) D-A copolymer J40 was designed and synthesized by introducing 2-octyldodecyloxy side chains on its BDT units, for expanding the family of the BDT- alt-FBTA-based copolymers and investigating the side chain effect on the photovoltaic performance of the polymer in non-fullerene polymer solar cells(PSCs).J40 exhibits complementary absorption spectra and matched electronic energy levels with the n-type organic semiconductor(n-OS)(3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-sindaceno[1,2-b:5,6-b′]dithiophene)(ITIC) acceptor, and was used as polymer donor in the non-fullerene PSCs with ITIC as acceptor. The power conversion efficiency(PCE) of the PSCs based on J40:ITIC(1:1, w/w) with thermal annealing at 120 °C for 10 min reached 6.48% with a higher open-circuit voltage(Voc) of 0.89 V. The high Voc of the PSCs is benefitted from the lower-lying highest occupied molecular orbital(HOMO) energy level of J40. Although the photovoltaic performance of the polymer J40 with alkoxy side chain is lower than that of J60 and J61 with alkylthio-thienyl conjugated side chains, the PCE of6.48% for the J40-based device is still a relatively higher photovoltaic efficiency in the non-fullerene PSCs reported so far. The results indicate that the family of the BDT-alt-FBTA-based D-A copolymers are high performance polymer donor materials for non-fullerene PSCs and the side chain engineering plays an important role in the design of high performance polymer donors in the non-fullerene PSCs. | Haijun Bin Lian Zhong Zhi-Guo Zhang Liang Gao Yankang Yang Lingwei Xue Jing Zhang Zhanjun Zhang Yongfang Li | 2016 | Science China Chemistry2016，59，10： | 1 |
| 10 | Quantitative reorientation behaviors of macro-twin interfaces in shape-memory alloy under compression stimulus in situ TEM显示文摘Twinning stress is known to be a critical factor for the actuating performance of magnetic shape memory alloys because of the harmful deterioration of their magnetic field-induced strain effect.However,the intrinsic origin of the high twinning stress is still in debate.In this work,we firstly fill this gap by precisely probing the reorientation behaviors of A-C and A-B two common macro-twin interfaces under the stimulus of uniaxial compression in-situ transmission electron microscope.The grain boundary is proved to be the main reason for large twinning stress.The twinning stress of the A-C and A-B type interfaces quantitatively are~0.69 and 1.27 MPa within the plate respectively.The A-C type interface evidently has smaller twinning stress and larger deformation variable than the A-B interface.Under the action of compression,not only the orientations of the crystals have changed,but also the roles of the major and minor lamellae have changed for both interfaces due to the movements of twinning dislocations.Combining insitu and quasi in-situ electron diffraction data,the reorientation process is clearly and intuitively shown by the stereographic projection.Atomic models and the theory of dislocation motion are proposed to phenomenologically clarify the intrinsic mechanism.This work is believed to not only provide a deeper understanding of the deformation mechanism of magnetic shape memory alloys under uniaxial compression testing,but also discover that compression training is not the mechanical training way to decrease the twinning stress of non-modulated martensite in single crystal shape memory alloys. | Bin Chen Chaoshuai Guan Yong Li Chong Yang Junwei Zhang Gang Liu Lingwei Li Yong Peng | 2022 | Journal of Materials Science & Technology2022，，12： | 0 |
| 11 | Underwater minirobots actuated by hybrid driving method显示文摘Underwater minirobots have attracted significant interest due to their value in complex application scenarios.Typical underwater minirobots are driven mainly by a soft or rigid actuator.However,soft actuation is currently facing challenges,including inadequate motional control accuracy and the lack of a continuous and steady driving force,while conventional rigid actuation has limited actuation efficiency,environmental adaptability,and motional flexibility,which severely limits the accomplishment of complicated underwater tasks.In this study,we developed underwater minirobots actuated by a hybrid driving method(HDM)that combines combustion-based actuators and propeller thrusters to achieve accurate,fast,and flexible underwater locomotion performance.Underwater experiments were conducted to investigate the kinematic performance of the minirobots with respect to the motion modes of rising,drifting,and hovering.Numerical models were used to investigate the kinematic characteristics of the minirobots,and theoretical models developed to unveil the mechanical principle that governs the driving process.Satisfactory agreement was obtained from comarisons of the experimental,numerical,and theoretical results.Finally,the HDM was compared with selected hybrid driving technologies in terms of acceleration and response time.The comparison showed that the minirobots based on HDM were generally superior in transient actuation ability and reliability. | Xinghong YE Yang YANG Pengcheng JIAO Zhiguo HE Lingwei LI | 2023 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2023，24，7： | 0 |
| 12 | Functionalized carbon dots for corrosion protection:Recent advances and future perspectives显示文摘Metal corrosion causes significant economic losses,safety issues,and environmental pollution.Hence,its prevention is of immense research interest.Carbon dots(CDs)are a new class of zero-dimensional carbon nanomaterials,which have been considered for corrosion protection applications in recent years due to their corrosion inhibition effect,fluorescence,low toxicity,facile chemical modification,and cost-effectiveness.This study provides a comprehensive overview of the synthesis,physical and chemical properties,and anticorrosion mechanisms of functionalized CDs.First,the corrosion inhibition performance of different types of CDs is introduced,followed by discussion on their application in the development of smart protective coatings with self-healing and/or self-reporting properties.The effective barrier formed by CDs in the coatings can inhibit the spread of local damage and achieve self-healing behavior.In addition,diverse functional groups on CDs can interact with Fe^(3+)and H^(+)ions generated during the corrosion process;this interaction changes their fluorescence,thereby demonstrating self-reporting behavior.Moreover,challenges and prospects for the development of CD-based corrosion protection systems are also presented. | Li Zhao Jinke Wang Kai Chen Jingzhi Yang Xin Guo Hongchang Qian Lingwei Ma Dawei Zhang | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，11： | 0 |
| 13 | Relevance Theory-based Cognitive Study on the Communication Effect of “China's Stories”显示文摘Telling the story of China and transmitting the voice of China has become a strategy to promote the national image and cultural soft power of China. Since its implementation in 2013, China has ushered in a significant change in communication ideas and approaches. This strategy also enriches the communication genres of 'China's stories' and more importantly enhances its communication effect. In this context, it is necessary to understand and study the significance of this strategic practice, assess the value realization of 'China's stories' during the communication process, and thereby establish a basis for future communication of more 'China's stories.' Based on the factors of relevance theory, this paper analyzes the ideas of and approaches to effective communication of 'China's stories' and proposes corresponding strategies. | Yang Xiaohong Wu Lingwei | 2017 | Contemporary Social Sciences2017，2，6： | 0 |
| 14 | The Half-industrial and Half-agricultural Working Structure in Rural China显示文摘The half-industrial and half-agricultural working structure in rural China is a key phenomenon supporting China's industrialization and urbanization. Based on inter-generational division of labor, the current half-industrial and half-agricultural working structure has given birth to the elderly agriculture and mainstay agriculture, the latter of which has gone out of agricultural involution and to some extent changed the management philosophy of traditional agriculture, becoming a key direction of China's agricultural development. Such a structure has also shaped the 'new three-generation family' and facilitated the expansion of middle-income rural groups. While supporting long-term farmers in rural China, it also paves the way for China's urbanization. This structure plays a significant role in the economic, political and social development of rural China. Therefore, this structure is a rural economic structure which concerns farmers' income structure and livelihood patterns. Meanwhile, it is also a rural political structure, village structure and family structure. Through development and refinement, the half-industrial and halfagricultural working structure in rural China has far extended the scope of a descriptive concept. As a dominant variable, the structure, along with its derivatives, through permutation and combination, can establish logical relationships and an interpretation chain among a variety of major economic, political and social phenomena in rural China. Therefore, it can expect to be constructed into an analyticity-oriented mid-level concept. | Yang Hua Wu Lingwei | 2017 | Contemporary Social Sciences2017，2，3： | 0 |
| 15 | Dislocated Character Affirmation——A Case Study of Young Female Gamers' Identity in Online Games显示文摘What are the real intentions of young women to play online games? Can they benefit more than just entertainment? Based on a 2-year followup survey of a young female online gamer, this paper explores the inner experiences of a young female gamers. Findings indicate that young female Chinese gamers attach importance to the choice of characters in the world of online games and that they establish a sense of identity in virtual space through character affirmation and interactions with other gamers. For young female gamers, who are eager to temporarily escape from reality, playing online games is a positive psychological compensation and a process for building self-confidence. | Yang Xiaohong Wu Lingwei | 2017 | Contemporary Social Sciences2017，2，3： | 0 |
| 16 | Unlocking the charge doping effect in softly intercalated ultrathin ferromagnetic superlattice显示文摘The electrolyte-assisted exfoliation strategy is widely employed to synthesize ultrathin two-dimensional(2D)materials.Yet,spins in 2D magnets are susceptible to the electrolyte due to the underlying charge doping effect.Hence,it is crucial to understand and trace the doping process during the delamination of 2D magnets.Taking the prototype Fe_(3)GeTe_(2),we utilized soft organic cations to exfoliate the bulk and obtain a freestanding organ-ic–inorganic hybrid superlattice with a giant electron doping effect as high as 6.9×10^(14)/cm^(2)(~1.15 electrons per formula unit).A remarkable ferromagnetic transition exceeding 385 K was revealed in these superlattices,together with unique anisotropic saturation magnetization.The doping enhanced the in-plane electron–phonon coupling and thus optimized originally poor indirect double-exchange scenario for spin electrons.The emerging vertical magnetization shift phenomenon served to evaluate the uniformity of charge doping.The above findings provide a new perspective for understanding the role of parasitic charge in 2D magnetism. | Liang Hu Bingzhang Yang Zhipeng Hou Yangfan Lu Weitao Su Lingwei Li | 2023 | eScience2023，3，3： | 0 |
| 17 | Introduction of nanotwins into nanoprecipitations strengthened CoCrNiMo_(0.2) alloy to achieve strength and ductility trade-off:A comparative research显示文摘Normal strengthening methods through precipitations and deformation obviously enhance the strength of metallic materials while resulting in the sacrifice of ductility,and synergistic improvement of strength and ductility is currently an urgent requirement.Herein we developed a cryogenic deformation combined with an annealing method to fabricate CoCrNiMo_(0.2) medium entropy alloy,which achieved an ultrahigh strength of 1.8 GPa with synergistic improvement in strength and ductility.Microstructure,mechanical performance,and strengthening mechanisms of the developed alloys were investigated compared with that prepared by the regular room temperature deformation method.It was found that high-density nanotwins were produced in CoCrNiMo_(0.2) MEA via cryogenic deformation.Fine grains,hard precipitations,and high volume fraction of nanotwins greatly strengthened the alloy,obtaining a yield and ultimate tensile strength of 1400 MPa and 1800 MPa.Ductility improvement of the developed alloy was mainly attributed to the production of deformation nanotwins due to the lower stacking fault energy,which greatly increases the dislocation storage ability,and thus,the ductility of the alloy was enhanced. | Hao Zhang Ziyi Ren Yonggang Tong Yongle Hu Xixi Ji Lingwei Yang Kaiming Wang Jingzhong Fang Hui Chen Xiubing Liang | 2023 | Journal of Materials Science & Technology2023，，25： | 0 |
| 18 | Perylene-diimide derived organic photovoltaic materials显示文摘In organic solar cells(OSCs), the material design on photovoltaic layers and interlayers has significantly contributed to the rapid progress of the device performance. Perylene-diimides(PDIs), owing to their distinct advantages of high electron affinity, high electron mobility and facial chemical modification, are being widely studied in OSCs, especially designed as photovoltaic acceptors and cathode interlayers. In this review, recent progress on those PDI derived photovoltaic materials is systematically summarized. Due to the different working mechanism in devices, the design strategies on modification of the parent PDI units towards their application as acceptors and cathode interlayers are explained. After disclosing the fundamental structure-property relationships, we disclose some common features in the design of those tailor-made PDI-based photovoltaic materials, and we also highlight the challenges and opportunities in improving their device performance in the future. | Ming Zhang Yang Bai Chenkai Sun Lingwei Xue Haiqiao Wang Zhi-Guo Zhang | 2022 | Science China Chemistry2022，65，3： | 0 |
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