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Encoding syntactic representations with a neural network for sentiment collocation extraction

Science China(Information Sciences) 2017年第11期60卷 7-18页

作者： Yanyan ZHAO bing qin Ting LIU Department of Media Technology and Art Harbin Institute of Technology Department of Computer Science and Technology Harbin Institute of Technology

Sentiment collocation refers to the collocation of a target word and a polarity word. Sentiment collocation extraction aims to extract the targets and their modifying polarity words by analyzing the relationships between them. This can be regarded as a basic sentiment analysis task and is relevant in many practical applications. Previous studies relied mainly on the syntactic path, which is used to connect the target word and the polarity word. To deeply exploit the semantic information of the syntactic path, we propose two types of syntactic representation, namely, relation embedding and subtree embedding, to capture the latent semantic features. Relation embedding is used to represent the latent semantics between targets and their corresponding polarity words, and subtree embedding is used to explore the rich syntactic information for each word on the path. To combine the two types of syntactic representations, a neural network is constructed. We use a recursive neural network(RNN) to model the subtree embeddings, and then the subtree embedding and the word embedding are combined as the enhanced word representation for each word in the syntactic path. Finally,a convolutional neural network(CNN) is adopted to integrate the two types of syntactic representations to extract the sentiment collocations from reviews. Our experiments were conducted on six types of reviews, which included product domains(such as cameras and phones) and service domains(such as hotels and restaurants).The experimental results show that our proposed method can accurately capture the latent semantic features hidden behind the syntactic paths that neither the common feature-based methods nor the syntactic-path-based method can handle, and, further, that it significantly outperforms numerous baselines and previous methods.

关键词： sentiment collocation extraction sentiment analysis syntactic representation neural network re cursive neural network(RNN) convolutional neural network(CNN)

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Rational fabrication of ordered porous solid strong bases by utilizing the inherent reducibility of metal-organic frameworks

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Nano Research 2022年第4期15卷 2905-2912页

作者： song-song Peng Xiang-Bin Shao Yu-Xia Li Yao Jiang Chen Gu Manish Kumar Dinker Xiao-qin Liu(✉) Lin-bing Sun State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)College of Chemical EngineeringNanjing Tech University30 South Puzhu RoadNanjing 211816China

Ordered porous solid strong bases(OPSSBs)have attracted great research interest due to the excellent performance as heterogeneous catalysts in various *** main obstacle for fabricating OPSSBs is the requirement of high temperature to produce strong basicity on ordered porous *** example,the temperatures of 600-650℃ are required for the decomposition of base precursor NaNO_(3)to basic sites on mesoporous silica SBA-15 and zeolite *** high decomposition temperatures are energy-intensive and harmful to the structure of ***,we report the fabrication of OPSSBs by utilizing the redox interaction between base precursor and low-valence metal centers(e.g.,Cr^(3+))in metal-organic frameworks(MOFs).The base precursor NaNO_(3)on MIL-101(Cr)can be converted to basic sites entirely at 300℃,which is quite lower than those of the conventional thermal conversion on SBA-15 and zeolite Y(600-650℃).The exploration on decomposition mechanism reveals that the valence change of Cr^(3+)to Cr^(6+)takes place during the conversion of NaNO_(3)to basic *** this way,MOFs-derived base catalysts have been synthesized successfully by the host-guest redox strategy and exhibit high catalytic activity in typical base-catalyzed reactions.

关键词： metal-organic frameworks ordered porous solid strong bases host–guest redox interaction transesterification reaction Cr centers

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Enhancing photoresponsiveness of metal-organic polyhedra by modifying microenvironment

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Nano Research 2024年第6期17卷 5712-5717页

作者： Long Zheng Peng Tan Qian song Sheng-Tao Wang Min Li Xiao-qin Liu Lin-bing Sun State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

Photoresponsiveness of materials is critical to their tunability and efficiency in terminal *** metal-organic polyhedra(PMOPs)feature intrinsic pores and remote controllability,but aggregation of PMOPs in solid state hampers their photoresponsiveness ***,we report the construction of a new PMOP(Cu_(24)(C_(16)H_(12)N_(2)O_(4))_(12)(C_(18)H_(22)O_(5))12,denoted as MOP-PR-LA),where long alkyl(LA)chains act as the intermolecular poles,propping against adjacent PMOP molecules to create individual microenvironment benefiting the isomerization of photoresponsive(PR)*** ultraviolet(UV)-and visible-light irradiation,MOP-PR-LA is much easier to isomerize than the counterpart MOP-PR without *** propylene adsorption,MOP-PR has a low change of adsorption capacity(9.9%),while that of MOP-PR-LA reaches 58.6%.Density functional theory calculations revealed that PR in the cis state has a negative effect on adsorption,while the trans state of PR favors *** work might open an avenue for the construction of photoresponsive materials with high responsiveness and controllability.

关键词： photoresponsive adsorption metal-organic polyhedra azobenzene long alkyl chains propylene capture

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Exploration of IRES Elements within the ORF of the Coxsackievirus B3 Genome

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Biomedical and Environmental Sciences 2022年第4期35卷 322-333页

作者： song qin qin LUO Xiao Nuan SHI bing Tian LIU Mi song Juan XIA Dong XIA Zhi Qiang WANG Wen Jun YAO Hai Lan HAN Jun State Key Laboratory of Infectious Disease Prevention and Control National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China Molecular Immunology Laboratory Capital Institute of PediatricsBeijing 100020China

Objective This study aimed to identify internal ribosome entry sites(IRESs)in the open reading frame(ORF)of the Coxsackievirus B3(CVB3)*** The sequences of P1,P2,or P3 of the CVB3 genome or the truncated sequences from each antithymocyte globulin(ATG)to the end of the P1,P2,or P3 gene were inserted into the *** transfection,possible IRES-dependent green fluorescent protein(GFP)-fused proteins were detected by anti-GFP western *** sequences of possible IRESs were inserted into specific Fluc/Rluc bicistronic vectors,in which the potential IRESs were determined according to the Fluc/Rluc activity *** of Fluc and Rluc mRNA of the bicistronic vector was detected by *** After transfection of full length or truncated sequences of the P1,P2,or P3 plasmids,six GFPfused protein bands in P1,six bands in P2 and nine bands in P3 were detected through western *** IRESs in VP2(1461–1646 nt)and VP1(2784–2983 nt)of P1;one IRES in 2C(4119–4564 nt)of P2;and two IRESs in 3C(5634–5834 nt)and 3D(6870–7087 nt)of P3 were identified according to Fluc/Rluc activity *** cryptic promoter was also excluded by *** Five IRESs are present in the CVB3 coding region.

关键词： CVB3 ORF P1 P2 P3 IRESs

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A survey of discourse parsing

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Frontiers of Computer Science 2022年第5期16卷 85-96页

作者： Jiaqi LI Ming LIU bing qin Ting LIU School of Computer Science and Technology Harbin Institute of TechnologyHarbin 150001China Peng Cheng Laboratory Shenzhen 518052China

Discourse parsing is an important research area in natural language processing(NLP),which aims to parse the discourse structure of coherent *** this survey,we introduce several different kinds of discourse parsing tasks,mainly including RST-style discourse parsing,PDTB-style discourse parsing,and discourse parsing for multiparty *** these tasks,we introduce the classical and recent existing methods,especially neural network *** that,we describe the applications of discourse parsing for other NLP tasks,such as machine reading comprehension and sentiment ***,we discuss the future trends of the task.

关键词： discourse parsing discourse structure RST PDTB STAC

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A moment-based stochastic edge-based smoothed finite element method for electromagnetic forming process

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Science China(Technological Sciences) 2020年第9期63卷 1739-1750页

作者： YANG qin WANG bing LI She CUI XiangYang State Key Laboratory of Advanced Design and Maufacturing for Vehicle Body Hunan UniversityChangsha 410082China

In this paper, a novel stochastic method named as the moment-based stochastic edge-based finite element method(MSES-FEM)is proposed to deal with the uncertain electromagnetic problems. First, electromagnetic and mechanical field are formulated by smoothed Galerkin Weak Form under edge-based smoothed finite element method(ES-FEM) scheme. The moment analysis is then applied to obtain the first four moments of the responses and to observe the effects of each random variable on electromagnetic field responses. The maximum entropy theory is employed to calculate the probability density functions(PDFs) of the responses. A quasi-static electromagnetic problem and a practical electromagnetic forming problem(EMF) are performed. The proposed method successfully solves stochastic electromagnetic forming analysis under the uncertain parameters. Numerical results obtained by the proposed MSES-FEM are quite satisfactory with the ones by the Monte Carlo simulation(MCS).

关键词： MSES-FEM electromagnetic forming problem the moment analysis the maximum entropy theory probability density function

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Numerical evaluation of acoustic characteristics of a thrust chamber with quarter-wave resonators

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Science China(Technological Sciences) 2021年第2期64卷 375-386页

作者： qin JianXiu ZHOU LiXin ZHANG HuiQiang WANG bing China Academy of Aerospace Aerodynamics Beijing 100074China Xi’an Aerospace Propulsion Institute Xi’an 710100China School of Aerospace Engineering Tsinghua UniversityBeijing 100084China

Acoustic characteristics of a thrust chamber with quarter-wave resonators are numerically studied based on the unsteady Reynolds-averaged Navier-Stokes(URANS) method. Organized pressure disturbance model and constant-volume bomb model are applied as artificial disturbances to excite pressure oscillations in the chamber. Eigenfrequencies and amplitudes of acoustic modes of the chamber are obtained by fast fourier transform(FFT) analysis, while damping characteristics are evaluated by the half-power bandwidth method. Predicted damping capacities of the chamber with and without quarter-wave resonators agree well with experimental results. Pressure oscillations can be controlled by a quarter-wave resonator mainly through reducing the amplitude of target acoustic mode, rather than increasing damping capacity of the chamber. Major damping mechanism of the resonator is cutting down pressure peak of target acoustic mode and raising up its pressure trough(CPRT);therefore the amplitude of target acoustic mode is reduced significantly. Moreover, acoustic energy can be dissipated by vortex at the orifice and by viscosity on the surface of a resonator, which increase damping capacity of the chamber slightly. Under the condition with multi-modes pressure oscillations, a resonator can still suppress pressure oscillations of target acoustic mode through ***, it may enhance pressure oscillations of other modes due to redistribution of oscillation energy among all acoustic modes.

关键词： quarter-wave resonator eigenfrequency acoustic mode pressure oscillation damping capacity

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Intravitreal conbercept injection for neovascular agerelated macular degeneration

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International Journal of Ophthalmology(English edition) 2019年第2期12卷 252-257页

作者： bing-Hui Wu bing Wang Hui-qin Wu qin Chang Hui-qin Lu Department of Ophthalmology Xi’an No.1 Hospital

AIM: To evaluate the efficacy and safety of intravitreal injection of conbercept in patients with neovascular agerelated macular degeneration(AMD). METHODS: Retrospective review of 66 eyes of 63 patients with neovascular AMD. All patients received 0.5 mg intravitreal injections of conbercept monthly for 3 consecutive months, and then pro re nata treatment was performed. The changes of best-corrected visual acuity(BCVA) and central macular thickness(CMT) were observed before and after treatments. Minimum follow-up time was 12 mo. SPSS 22.0 statistical software was used for statistical analysis. RESULTS: The mean BCVA and CMT of 66 eyes(63 patients) were 1.11±0.60, 533.20±219.95 μm at baseline, and were 0.68±0.38, 310.28±125.60 μm at 3 mo. No subjects were lost during the first three months, the improvements were all significantly(P<0.05). During the whole follow-up time of 12 mo, 15 subjects(18 eyes) were lost. The mean BCVA and CMT of the rest 48 eyes with the follow-up time at least 1 y were 0.83±0.46 and 547.59±196.77 μm at baseline, after 3 mo and 12 mo of conbercept injections became 0.55±0.41, 318.24±141.29 μm and 0.55±0.51, 333.87±173.25 μm. The differences were significant(P<0.05). No serious complications were observed. CONCLUSION: Intravitreal injection of conbercept appears to significantly improve visual acuity and anatomical outcomes in patients with neovascular AMD, no serious adverse reactions and complications are observed.

关键词： age-related macular degeneration intravitreal injection conbercept

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Night-time radiative warming using the atmosphere

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Light(Science & Applications) 2023年第12期12卷 2589-2596页

作者： Yining Zhu Yiwei Zhou bing qin Rui qin Min Qiu Qiang Li State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024China

Night-time warming is vital for human production and daily *** methods like active heaters are energy-intensive,while passive insulating films possess restrictions regarding space consumption and the lack of heat *** this work,a nanophotonic-based night-time warming strategy that passively inhibits thermal radiation of objects while actively harnessing that of atmosphere is *** using a photonic-engineered thin film that exhibits high reflectivity(~0.91)in the atmospheric transparent band(8-14μm)and high absorptivity(~0.7)in the atmospheric radiative band(5-8 and 14-16μm),temperature rise of 2.1℃/4.4℃compared to typical low-e film and broadband absorber is ***,net heat loss as low as 9Wm-2 is experimentally observed,compared to 16 and 39Wm-2 for low-e film and broadband absorber,*** strategy suggests an innovative way for sustainable warming,thus contributes to addressing the challenges of climate change and promoting global carbon neutrality.

关键词： passive radiative absorber

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Novel Highly Selective Fluorescent Chemosensors for Hg（Ⅱ）

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Chemical Research in Chinese Universities 2013年第4期29卷 657-662页

作者： SU Wen-qi YANG bing-qin Key Laboratory of Synthetic and Natural Functional Molecule Chemistry Ministry of Education Department of Chemistry Northwest University Xi'an 710069 P. R. China

Based on Rhodamine,two novel fluorescent Hg2＋ chemosensors（R1,R2） were synthesized from inexpensive starting *** were designed and synthesized with o-aminophenol and o-phenylenediamine derivatives as the Hg2＋ chelator,the comparison between the photophysical properties of two chemosensor molecules was *** chemosensors were designed with a photoinduced electron transfer（PET） *** binding to Hg2＋ which blocks the PET process,the fluorescence intensity of the chemosensors was enhanced by up to *** exhibit very strong fluorescence responses to Hg2＋ and have remarkably higher selectivity for Hg2＋ than for other metal ions including K＋,Na＋,Ca2＋,Mg2＋,Cd2＋,Mn2＋,Ni2＋,Co2＋,Zn2＋,Cu2＋,Cr3＋,Fe3＋,pb2＋,Ag＋,Al3＋,Fe2＋ and Sn2＋ in Tris-HC1/sodium phosphate *** fluorescence enhancement of R2 towards Hg2＋ maintains stable in wide pH span（6.4-8.8） aqueous solutions.

关键词： Fluorescent chemosensor Mercury ion Sensor Rhodamine fluorophore Fluorescence intensity

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