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Structures and Characteristics of the Windy Atmospheric Boundary Layer in the South China Sea Region during Cold Surges

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Advances in Atmospheric Sciences 2015年第6期32卷 772-782页

作者： CHENG Xue-ling huang Jian WU lin ZENG qing-Cun State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Institute of Tropical and Marine Meteorology China Meteorological Administration Institute of Atmospheric Physics Chinese Academy of Sciences

An observational analysis of the structures and characteristics of a windy atmospheric boundary layer during a cold air outbreak in the South China Sea region is reported in this paper. It is found that the main structures and characteristics are the same as during strong wind episodes with cold air outbreaks on land. The high frequency turbulent fluctuations （period 〈 1 min） are nearly random and isotropic with weak coherency, but the gusty wind disturbances （1 rain〈period 〈 10 min） are anisotropic with rather strong coherency. However, in the windy atmospheric boundary layer at sea, compared with that over land, there are some pronounced differences：（1） the average horizontal speed is almost independent of height, and the vertical velocity is positive in the lower marine atmospheric boundary layer; （2） the vertical flux of horizontal momentum is nearly independent of height in the low layer indicating the existence of a constant flux layer, unlike during strong wind over the land surface; （3） the kinetic energy and friction velocity of turbulent fluctuations are larger than those of gusty disturbances; （4） due to the independence of horizontal speed to height, the horizontal speed itself （not its vertical gradient used over the land surface） can be used as the key parameter to parameterize the turbulent and gusty characteristics with high accuracy.

关键词： turbulence wind gust coherent structure cold surge windy marine atmospheric boundary layer

Monitoring of winter wheat distribution and phenological phases based on MODIS time-series： A case study in the Yellow River Delta, China

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Journal of Integrative Agriculture 2016年第10期15卷 2403-2416页

作者： CHU lin LIU qing-sheng huang Chong LIU Gao-huan State Key Laboratory of Resources and Environmental Information System/Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 P.R.China University of Chinese Academy of Sciences Beijing 100049 P.R. China

Accurate winter wheat identification and phenology extraction are essential for field management and agricultural policy making. Here, we present mechanisms of winter wheat discrimination and phenological detection in the Yellow River Delta（YRD） region using moderate resolution imaging spectroradiometer（MODIS） time-series data. The normalized difference vegetation index（NDVI） was obtained by calculating the surface reflectance in red and infrared. We used the Savitzky-Golay filter to smooth time series NDVI curves. We adopted a two-step classification to identify winter wheat. The first step was designed to mask out non-vegetation classes, and the second step aimed to identify winter wheat from other vegetation based on its phenological features. We used the double Gaussian model and the maximum curvature method to extract phenology. Due to the characteristics of the time-series profiles for winter wheat, a double Gaussian function method was selected to fit the temporal profile. A maximum curvature method was performed to extract phenological phases. Phenological phases such as the green-up, heading and harvesting phases were detected when the NDVI curvature exhibited local maximum values. The extracted phenological dates then were validated with records of the ground observations. The spatial patterns of phenological phases were investigated. This study concluded that, for winter wheat, the accuracy of classification is 87.07%, and the accuracy of planting acreage is 90.09%. The phenological result was comparable to the ground observation at the municipal level. The average green-up date for the whole region occurred on March 5, the average heading date occurred on May 9, and the average harvesting date occurred on June 5. The spatial distribution of the phenology for winter wheat showed a significant gradual delay from the southwest to the northeast. This study demonstrates the effectiveness of our proposed method for winter wheat classification and phenology det

关键词： remote sensing monitoring time-series winter wheat discrimination Yellow River Delta phenology detection

Extraction of gravitational wave signals with optimized convolutional neural network

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Frontiers of physics 2020年第1期15卷 135-140页

作者： Hua-Mei Luo Wenbin lin Zu-Cheng Chen qing-Guo huang School of Mathematics Southwest Jiaotong UniversityChengdu 610031China School of Physical Science and Technology Southwest Jiaotong UniversityChengdu 610031China School of Mathematics and Physics University of South ChinaHengyang 421001China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesNo.19A Yuquan RoadBeijing 100049China

Gabbard et *** demonstrated that convolutional neural networks can achieve the sensitivity of matched filtering in the recognization of the gravitational-wave signals with high efficiency[***.120,141103(2018)].In this work we show that their model can be optimized for better *** convolutional neural networks typically have alternating convolutional layers and max pooling layers,followed by a small number of fully connected *** increase the stride in the max pooling layer by 1,followed by a dropout layer to alleviate overfitting in the original *** find that these optimizations can effectively increase the area under the receiver operating characteristic curve for various tests on the same dataset.

关键词： gravitational wave convolutional neural networks deep learning

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通过使用频率统计进行主题词表管理初探

情报学报 1984年第4期3卷 345-348页

作者：林平青黄桂育陆榕影中医研究院图书情报中心

作者们使用《汉语主题词表》的中医药主题词对五千余篇中医药文献进行了标引。文章对主题词的使用频率和分布进行了统计分析。并对其中使用频率过高及过低者作了分析,从而提出对词表的修改意见。笔者认为,这是词表管理的一种重要的方法... 详细信息

作者们使用《汉语主题词表》的中医药主题词对五千余篇中医药文献进行了标引。文章对主题词的使用频率和分布进行了统计分析。并对其中使用频率过高及过低者作了分析,从而提出对词表的修改意见。笔者认为,这是词表管理的一种重要的方法和途径。

关键词：主题词表使用频率频率统计电针疗法

Significantly Enhanced Energy Storage Performances of PEI-based Composites Utilizing Surface Functionalized ZrO_(2) Nanoparticles for High-Temperature Application

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Chinese Journal of Polymer Science 2024年第3期42卷 322-332,I0006页

作者： qing-qing Liu Qiu-Hao lin Xiao-Dong Qi Nan Zhang Ting huang Jing-Hui Yang Yong Wang School of Chemistry Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of Advanced Technologies of Materials Ministry of Education of ChinaSouthwest Jiaotong UniversityChengdu 610031China

Polymer dielectrics with a high energy density and an available energy storage capacity have been playing an important role in advanced electronics and power systems. Nevertheless, the use of polymer dielectrics in harsh environments is limited by their low energy density at high temperatures. Herein, zirconium dioxide(ZrO_(2)) nanoparticles were decorated with amino group utilizing 4,4-methylenebis(phenyl isocyanate)(AMEO) and successfully incorporated into polyetherimide(PEI) matrix. The dielectric properties, breakdown strength, and energy storage performances of PEI/ZrO_(2)-AMEO nanocomposites were investigated from 25 ℃ to 150 ℃. It is found that the combination of moderate bandgap ZrO_(2) with modest dielectric constant and polar groups at interface with deep trap can offer an available strategy to simultaneously increase the dielectric constant and breakdown strength of polymer dielectrics. As a result, the composites containing ZrO_(2)-AMEO exhibit excellent energy storage performance at elevated temperatures. Specially, the PEI-based composites with 3 vol% ZrO_(2)-AMEO display a maximum discharged energy density(U_(d)) of 3.1 J/cm^(3) at 150 ℃, presenting 90% higher than that of neat PEI. This study may help to better develop the polymer-based dielectric composite applied at elevated temperatures.

关键词： Polyetherimide High temperature dielectric ZrO_(2) Interface

Bioinspired Self-assembly Nanochaperone Inhibits Tau-Derived PHF6 Peptide Aggregation in Alzheimer’s Disease

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Chinese Journal of Polymer Science 2022年第9期40卷 1062-1070页

作者： lin Zhu Ming-qing Zhang Hao-Ren Jing Xi-Peng Zhang lin-lin Xu Ru-Jiang Ma Fan huang lin-Qi Shi State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer Materials of Ministry of EducationCollege of ChemistryNankai UniversityTianjin 300071China Key Laboratory of Radiopharmacokinetics for Innovative Drugs Chinese Academy of Medical Sciencesand Institute of Radiation MedicineChinese Academy of Medical Sciences&Peking Union Medical CollegeTianjin300192China Nankai University School ofMedicine Nankai UniversityTianjinChina Department of Colorectal SurgeryTianjin Union Medical CenterTianjin 300074 China Department of Colorectal Surgery Tianjin Union Medical CenterTianjin 300121China

After repeated frustrations with amyloid beta(Aβ)-targeted clinical trials for Alzheimer’s disease(AD)in recent years,the therapeutic focus of AD has gradually shifted from Aβto tau *** misfolding and aggregation of tau protein into neurofibrillary tangles(NFTs)cause neuron death and synaptic dysfunction,and the deposition of NFTs is more closely related to the severity of AD than Aβ***,it has great potential to target tau protein aggregation for AD *** hexapeptide VQIVYK(known as PHF6)in tau protein has been found to play a dominant role for tau aggregation and was widely used as a model to design tau protein aggregation ***,inspired by natural heat shock protein(HSPs),we fabricated a self-assembly nanochaperone based on mixed-shell polymeric micelle(MSPM)as a novel tau-targeted AD *** tunable phase-separated microdomains on the surface,the nanochaperone could effectively bind with PHF6 aggregates,inhibit PHF6 aggregation,block neuronal internalization of PHF6 species,thus significantly alleviating PHF6 mediated ***,the as-prepared nanochaperone could work with proteinase to facilitate the degradation of PHF6 *** bioinspired nanochaperone demonstrated a new way to target tau protein and provided a promising strategy for AD treatment.

关键词： Alzheimer’s disease Tau protein PHF6 Nanochaperone Inhibition

Overexpression of DsbC and DsbG markedly improves soluble and functional expression of single-chain Fv antibodies in Escherichia coli

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Overexpression of DsbC and DsbG markedly improves soluble an...

Research on light dark matter particle from evaporating primordial black hole in CDEX-10 experiment

第十七届国际生物物理大会;第十二届中国生物物理大会

作者： Zhong Zhang~(1,2),Zhi-Hua Li~1,Fei Wang~1,Min Fang~1,Chang-Cheng Yin~1,Zhi-Yong Zhou~1,qing lin~1, huang-Liang huang~1 1.Group 102,Institute of Genetics and Developmental Biology,CAS,Beijing,P.R.China 2.Beijing ABT Genetic Engineering Technology Co.,Ltd.Beijing,P.R.China 3.Institute of Biophysics,CAS,Beijing,P.R.China

Single-chain Fv antibodies(scFv),a group of reconstructed molecules with several disulfide bonds,are prone to aggregate as inclusion bodies,the insoluble species of natural proteins,when expressed in Escherichia coli, especially at high *** of functionally active products from inclusion bodies is onerous and *** have increased the soluble and functional scFv yields by fusing either DsbC or DsbG,two E. coli disulfide isomerases with general chaperone function,to *** to the totally insoluble inclusion bodies of scFvs expressed separately,more than half of each fusion protein DsbC-scFv or DsbG-scFv

关键词： Single-chain antibody Folding Disulfide bond Soluble expression DsbC DsbG

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 168-169页

作者： qing-Guo huang School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

Dark matter is an essential component of the universe,accounting for approximately 85%of all ***,what the nature of dark matter actually is remains a huge *** far,all evidence for the existence of dark matter has come from gravitational *** gravitational interactions are universal,it is challenging to reveal the nature of dark matter through gravitational *** unravel the mystery of dark matter,it is essential to directly detect dark matter.

关键词： approximate particle gravitational

Laser lift-off technique and the re-utilization of GaN-based LED films grown on sapphire substrate

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Optoelectronics Letters 2008年第5期4卷 354-357页

作者： huang Jin ZHENG qing-hong LIU Bao-lin Department of Physics Xiamen University Xiamen 361005 China.

A thin GaN LED film, grown on 2-inch-diameter sapphire substrates, is separated by laser lift-off. Atom force microscopy （AFM） and the double-crystal X-ray diffraction （XRD） have been employed to characterize the performance of Gan before and after the lift-off process. It is demonstrated that the separation and transfer processes do not alter the crystal quality of the GaN films obviously. InGaN/GaN multi-quantum-wells （MQW＇s） structure is grown on the separated sapphire substrate later and is compared with that grown on the conventional substmte under the same condition by using PL and XRD spectrum.

关键词：激光器离地升空技术 GaN LED薄膜晶体质量