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Image Storage and Real-Time Distorted Image Correction by Using Photorefractivity in a Stable Photorefractive Polymer Composite

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Chinese Physics Letters 1999年第6期16卷 420-422页

作者： WANG Feng CHEN Zhi-jian gong qi-huang CHEN Yi-wang CHEN Hui-ying Department of Physics Mesoscopic Physics LaboratoryPeking UniversityBeijing 100871 Department of Chemistry Peking UniversityBeijing 100871

Using a highly stable and excellently performed three-component photorefractive(PR)polymer composite,poly(N-vinylcarbazole):1-n-butoxyl-2,5-dimethyl-4-(4-nitrophenylazo)benzene:2,4,7-tnnitro-9-fluorenone,optical image storage was *** dark storage time was *** PR response time was measured to be about 200 ms at an intensity of 1 W/cm^(2) with an applied electric Held of 84 V/μm.A proof-of-principle experiment on real-time correction of distorted images based on phase conjugation of four-wave mixing geometry was also carried out.

关键词： composite Image correction

Modified-PVK-based Photorefractive Three-Component Low-T_(g) Composites

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Chinese Physics Letters 1999年第5期16卷 353-355页

Two modified poly(N-carbazole),poly(2-carbazolylethyl methacrylate)(PCEMA)and poly(3-carbazolylpropyl methacrylate)(PCPMA),were *** with electro-optic(EO)chromophore 1-n-butoxyl-2,5-dimethyl-4-(4'-nitrophenylazo)benzene and the photosensitizer 2,4,7-trinitro-9-fluorenone,the EO response and photore-fractive(PR)effect were studied *** to the shorter spacer between the carbazolyl and the main-chain and thus a higher glass-transition-temperature T_(g),PCEMA-based composite exhibited an effective EO coefficient as only a quarter as that in PCPMA-based ***,a slight higher two-beam coupling coefficient and much faster PR response were observed in the *** was suggested that both the spacer length and the polymerization degree changed the T_(g) and the number density of traps,which decided the EO and PR responses.

关键词： coefficient faster shorter

Anomalous changes of temperature and ozone QBOs in 2015−2017 from radiosonde observation and MERRA-2 reanalysis

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Earth and Planetary Physics 2021年第3期5卷 280-289页

作者： XiaoYan Bai KaiMing huang ShaoDong Zhang ChunMing huang Yun gong School of Electronic Information Wuhan UniversityWuhan 430072China Key Laboratory of Geospace Environment and Geodesy Ministry of EducationWuhan 430072China State Observatory for Atmospheric Remote Sensing Wuhan 430072China

Anomalous changes of zonal wind quasi-biennial oscillation(QBO)in winter 2015−2016 have received close *** radiosonde and satellite observations and reanalysis data,we investigate anomalous changes in temperature and ozone QBOs from the lower to middle *** wind shear direction is reversed due to unexpected changes of zonal wind QBO at about 24−30 km,the shortest cold phase at 21−27 km appears in temperature *** is different from the completely interrupted westward phase in zonal wind QBO,while the longest cold phase above almost 27 km lasts for 2−3 years from 2015 to 2017,owing to the absence of corresponding warm *** scale reduction of temperature QBO causes a small temperature anomaly,thus the thermal wind relationship looks seemingly different from that in the other regular QBO *** in the ozone mixing ratio anomaly shows a double-peak with inverse phase,and its phase below(above)30 km is in agreement with(opposite to)the phase of temperature QBO because of different control mechanisms of *** temperature QBO variation,QBO in the ozone mixing ratio anomaly exhibits a less positive phase at 20−30 km in 2016−2017,and a very long positive phase above 30 km from 2015 to *** in total column ozone shows a small peak in winter 2016−2017 since ozone is mainly concentrated at 20 to 30 *** changes of temperature and ozone QBOs due to unexpected QBO zonal wind variation can be well-explained according to thermal wind balance and thermodynamic balance.

关键词： QBO temperature anomaly ozone anomaly thermal wind balance

Understanding Abiotic Stresses and the Solution

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Journal of Integrative Plant Biology 2008年第10期50卷 1185-1186页

作者： qi Xie Professor Zhizhong gong Professor Institute of Genetics and Developmental Biology the Chinese Academy of Science Beijing China China Agricultural University Beijing China

The abilities to perceive internal and external signals and to adapt to different environmental conditions are hallmarks of all living organisms. Understanding this information flow between organisms and their environment remains a hot topic in life sciences. Plants are an integral part of our ecosystem. A major challenge in plant biology is the uncovering of the developmental process from a single cell into a mature plant. Some aspects of plant development are entirely genetically programmed, but most are influenced by the environment, allowing plants to adapt to prevailing conditions. The molecular mechanisms of signal transduction pathways in higher plant are essential to vital processes such as hormone and light perception, plant and environment recognition and interaction.

关键词： Understanding Abiotic Stresses Solution

Ultrafast Solvation Dynamics of Subtilisin-Polyethylene Glycol Interaction for Protein Crystallization

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Chinese Physics Letters 2011年第6期28卷 298-301页

作者： DING qing MENG Geng WANG Shu-Feng ZHENG Xiao-Feng YANG Hong gong qi-huang State Key Laboratory for Mesoscopic Physics Department of PhysicsPeking UniversityBeijing 100871 School of Life Sciences Peking UniversityBeijing 100871

We study the ultrafast solvation dynamics of protein-precipitant *** subtilisin carlsberg(SC)was mixed with several polyethylene glycol(PEG)precipitants for protein ***-resolved emission spectra from single intrinsic tryptophan residue(Trp-113)are recorded to construct solvation correlation *** precipitant concentrations with various crystallization effects,we observe drastically different solvation relaxation *** differences in solvation dynamics are correlated with the local protein structural integrity and water-network stability upon interaction with the *** solvation dynamics at the protein surface is proposed as a new perspective to study precipitant-protein interactions.

关键词： crystallization functions processes

Electro-optic and Photorefractive Properties of Doped Poly (N-Vinylcarbazole)

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Chinese Physics Letters 1997年第6期14卷 474-477页

作者： WANG Shu-feng huang Zhi-wen CHEN Zhi-jian gong qi-huang ZHANG Zhi-jie CHEN Hui-ying Department of Physics Mesoscopic Physics LaboratoryPeking UniversityBeijing 100871 Department of Chemistry Peking UniversityBeijing 100871

In this work,100μm-thick doped poly(N-vinylcarbazole)films with different contents of the electro-optic(EO)chromophore 2,5-dimethyl-4-(p-nitrophenylazo)anisole and plasticizer N-ethylcarbazole were prepared and sandwiched between two indium-tin oxide-covered glass *** EO measurements and two-beam-coupling experiments were performed by using a single mode(TEM00)He-Ne *** the EO coefficient and the gain for two-beam-coupling were found to be strongly depending on the content of plasticizer.

关键词： Photorefractive coupling beam

The Production of Pseudo Goldstone Boson in Top Quark Rare Decay

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Communications in Theoretical Physics 2002年第5期38卷 566-570页

作者： huang Jin-Shu LU gong-Ru Department of Physics Henan Nanyang Normal College Nanyang 473061 China Department of Physics Henan Normal University Xinxiang 453002 China

We calculate the flavor changing t → cπ0 decay in the framework of the topcolor assisted multiscaletechnicolor model. We find that (a) the branching ratio of t → cπ0 is insensitive to mπ, mπs and mπt, while it increasesquickly as ε increases; (b) for reasonable ranges of the parameters, the maximum of the branching ratio in this modelmay reach 7 × 10-6, seven orders larger compared to the one t → cH0 calculated in the standard model. This mightprovide an opportunity to detect the rare decay of the top quark in experiments.

关键词： branching ratio, rare decay of the top quark, pseudo Goldstone boson, technicolor

The additive effects of bioactive glasses and photobiomodulation on enhancing bone regeneration

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Regenerative Biomaterials 2023年第1期10卷 702-712页

作者： Lidong huang Weiyu gong Guibin huang Jingyi Li Jilin Wu Yanmei Dong Department of Cariology and Endodontology Peking University School and Hospital of Stomatology&National Center for Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Research Center of OralBiomaterials and Digital Medical DevicesBeijing 100081China

Bioactive glasses(BG)have been generally used in bone defects repair for its good osteoinductivity and ***,the early angiogenesis of BG in the repair of large-sized bone defects may not be sufficient enough to support new bone formation,resulting in the failure of bone ***(PBM)therapy,which is superior on promoting early angiogenesis,may contribute to the angiogenesis of BG and further enhance the repair of bone ***,we applied BG and PBM in combination and preliminarily investigated their additive effects on bone regeneration both in vitro and in *** in vitro results revealed that BG combined with PBM remarkably enhanced human bone marrow mesenchymal stem cells proliferation,osteogenic-related genes expression and mineralization,which was better than applying BG or PBM *** in vivo studies,the histological staining results showed that BG induced new bone formation in the interior of defects and promoted new bone reconstruction at 6 weeks *** micro-computed tomography results further confirmed that BG combined with PBM accelerated bone formation and maturation,improved the speed and quality of bone regeneration,and promoted bone *** conclusion,with the optimum BG and PBM parameters,BG combined with PBM generated additive effects on promoting bone regeneration.

关键词： bioactive glasses photobiomodulation osteogenesis angiogenesis tissue engineering

Big Data-Based Transformer Substation Fault Prediction Method

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Journal of Electronic Science and Technology 2021年第2期19卷 173-185页

作者： Xin Wu Jian Li qi huang School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu 610054

Transformer substations play a major role in power *** fault of a transformer substation will jeopardize the safety and effective operation of the power *** fault signal of a transformer substation includes the fault status and fault occurrence *** this paper,we propose a transformer substation fault prediction method based on big data ***,a new transformer substation fault prediction method is developed by combining the advantages of decision tree algorithms and grey system theory to predict the fault status and occurrence time with high *** a case study,the transformer substation fault signals obtained from a region in the southwest of China are analyzed using the proposed method based on big *** experimental results confirm that the proposed method achieves high-accuracy fault prediction.

关键词： Big data decision tree grey system theory power system prediction