检索结果-南通市图书馆

Eccrine Spiradenoma with a Zosteriform Pattern: A Case Report

在线全文

学校读者我要写书评

暂无评论

International Journal of Dermatology and Venereology 2019年第2期2卷 125-126页

作者： ling-zhuo kong Xin-Feng Wu Department of Dermatology Xiang'an Hospital Affiliated of Xiamen University Xiamen Fujian 361000 China Department of Plastic and Aesthetic Surgery Hospital for Dermatology(Institute of Dermatology) Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing Jiangsu 210042 China

IntroductionEccrine spiradenoma (ES) is an uncommon adnexal tumor that is thought to originate from eccrine sweat *** usually manifests as a blue-violet or florid solitary painful nodule with pain on *** may affect any part of the body,but mostly affects the extremities without age and sex *** ES lesions are rarely *** typical pathological features,namely,small cells with hyperchromatic nuclei and large cells with dark nuclei,help with diagnosis and differentiation of ES from other painful skin *** transformation is rarely *** excision is the most recommended treatment and provides a good *** we report a rare multiple ES case with zosteriform presentation,and the patient had nothing crucial were out of normal limits including dermatological examination and routine investigations.

关键词： Eccrine Spiradenoma Case Report investigations

研究型大学赋能区域创新发展的理论审思与策略——以粤港澳大湾区为例

在线全文

学校读者我要写书评

暂无评论

华东师范大学学报（教育科学版） 2025年第1期43卷 67-80页

作者：卓泽林华南师范大学国际与比较教育研究所/东南亚文化教育研究中心广州510631

作为粤港澳大湾区区域创新系统的重要组成部分,研究型大学在推动区域创新中应发挥关键支撑作用。但现状是该地区创新系统主导力量仍是企业和政府,研究型大学在当中的作用有待进一步提升。基于三螺旋和区域创新系统理论以及对访谈材料的... 详细信息

作为粤港澳大湾区区域创新系统的重要组成部分,研究型大学在推动区域创新中应发挥关键支撑作用。但现状是该地区创新系统主导力量仍是企业和政府,研究型大学在当中的作用有待进一步提升。基于三螺旋和区域创新系统理论以及对访谈材料的质性分析,本文剖析了粤港澳大湾区创新体系的主要构成要素,探讨了研究型大学在其中的定位和作用,并从知识生产、科研成果的转化扩散和人力资本培养等方面分析了阻碍研究型大学在大湾区创新体系发挥作用的因素。最后提出通过完善人才评价激励制度、打通大学企业旋转门机制、创新人才培养模式等举措来强化研究型大学在大湾区创新区域发展中的重要作用。

关键词：粤港澳大湾区区域创新生态系统三螺旋研究型大学

维普期刊数据库博看期刊

Subtropical urban turfs： Carbon and nitrogen pools and the role of enzyme activity

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2018年第3期30卷 18-28页

作者： ling kong LM Chu School of Life Sciences The Chinese University of Hong Kong Shatin NT Hong Kong SAR China department of orthopaedics & traumatology faculty of medicine the chinese university of hong kong

Urban grasslands not only provide a recreational venue for urban residents, but also sequester organic carbon in vegetation and soils through photosynthesis, and release carbon dioxide through respiration, which largely contribute to carbon storage and fluxes at regional and global scales. We investigated organic carbon and nitrogen pools in subtropical turfs and found that dissolved organic carbon（DOC） and dissolved organic nitrogen（DON）were regulated by several factors including microbial activity which is indicated by soil enzymatic activity. We observed a vertical variation and different temporal patterns in both soil DOC, DON and enzyme activities, which decreased significantly with increasing soil depths. We further found that concentration of soil DON was linked with turf age. There were correlations between grass biomass and soil properties, and soil enzyme activities. In particular, soil bulk density was significantly correlated with soil moisture and soil organic carbon（SOC）. In addition, DOC correlated significantly with DON. Significant negative correlations were also observed between soil total dissolved nitrogen（TDN） and grass biomass of Axonopus compressus and Zoysia matrella. Specifically, grass biomass was significantly correlated with the soil activity of urease and β-glucosidase. Soil NO3-N concentration also showed negative correlations with the activity of both β-glucosidase and protease but there were no significant correlations between cellulase and soil properties or grass biomass. Our study demonstrated a relationship between soil C and N dynamics and soil enzymes that could be modulated to enhance SOC pools through management and maintenance practices.

关键词： Dissolved organic carbon (DOC)lDissolved organic nitrogen (DON)lSoil enzymelTurfgrass

On the Integrality of Characteristic Elements in Nonabelian Iwasawa Theory

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2008年第1期24卷 43-58页

作者： ling Quan kong School of Mathematical Sciences Beijing Normal University Beijing 100875 P. R. China

This paper is concerned with a conjecture formulated by Coates et al in [4] which describes the relation between the integrality of the characteristic elements and their evaluations in the noncommutative Iwasawa theor... 详细信息

关键词： p-adic Lie group K group characteristic element Iwasawa theory

Molecular diagnosis and direct quantification of cereal cyst nematode(Heterodera filipjevi) from field soil using TaqMan real-time PCR

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2023年第8期22卷 2591-2601页

作者： JIAN Jin-zhuo HUANG Wen-kun kong ling-an JIAN Heng Sulaiman ABDULSALAM PENG De-liang PENG Huan State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China Key Laboratory of Plant Pathology of Ministry of Agriculture and Rural Affairs College of Plant ProtectionChina Agricultural UniversityBeijing100193P.R.China Division of Agricultural Colleges/Department of Crop Protection Ahmadu Bello UniversityZaria 810107Nigeria

Heterodera filipjevi continues to be a major threat to wheat production *** detection and quantification of cyst nematodes are essential for more effective control against this nematode *** the present study,a TaqManminor groove binder(TaqMan-MGB)probe-based fluorescence quantitative real-time PCR(qPCR)was successfully developed and used for quantifying *** from DNA extracts of *** primers and probe designed from the obtained RAPD-SCAR marker fragments of *** showed high specificity to *** using DNA from isolatesconfirmed species of 23 Heterodera spp.,1 Globodera *** 3 Pratylenchus *** qPCR assay is highly sensitive and provides improved *** detection sensitivity of as low as 4^(-3) single second-stage juvenile(J2)DNAs,10^(-3) female DNAs,and 0.01μgμL^(-1) genomic DNAs.A standard curve relating to the threshold cycle and log values of nematode numbers was generated and validated from artificially infested soils and was used to quantify *** in naturally infested field *** was a high correlation between the *** numbers estimated from 32 naturally infested field soils by both conventional methods and the numbers quantified using the qPCR *** potentially provides a useful platform for the efficient detection and quantification of *** directly from field soils and to quantify this species directly from DNA extracts of field soils.

关键词： cereal cyst nematode Heterodera filipjevi molecular diagnosis quantification TaqMan real-time PCR

Precision measurement and compensation of kinematic errors for industrial robots using artifact and machine learning

在线全文

学校读者我要写书评

暂无评论

Advances in Manufacturing 2022年第3期10卷 397-410页

作者： ling-Bao kong Yi Yu Shanghai Engineering Research Center of Ultra-precision Optical Manufacturing Department of Optical Science and EngineeringFudan UniversityShanghai 200438People's Republic of China

Industrial robots are widely used in various areas owing to their greater degrees of freedom(DOFs)and larger operation space compared with traditional frame movement systems involving sliding and rotational ***,the geometrical transfer of joint kinematic errors and the relatively weak rigidity of industrial robots compared with frame movement systems decrease their absolute kinematic accuracy,thereby limiting their further application in ultraprecision *** imposes a stringent requirement for improving the absolute kinematic accuracy of industrial robots in terms of the position and orientation of the robot arm *** measurement and compensation methods for industrial robots either require expensive measuring systems,producing positioning or orientation errors,or offer low measurement ***,a kinematic calibration method for an industrial robot using an artifact with a hybrid spherical and ellipsoid surface is proposed.A system with submicrometric precision for measuring the position and orientation of the robot arm end is developed using laser displacement ***,a novel kinematic error compensating method involving both a residual learning algorithm and a neural network is proposed to compensate for nonlinear errors.A six-layer recurrent neural network(RNN)is designed to compensate for the kinematic nonlinear errors of a six-DOF industrial *** results validate the feasibility of the proposed method for measuring the kinematic errors of industrial robots,and the compensation method based on the RNN improves the accuracy via parameter *** studies show that the measuring system and compensation method can reduce motion errors by more than 30%.The present study provides a feasible and economic approach for measuring and improving the motion accuracy of an industrial robot at the submicrometric measurement level.

关键词： Industrial robot Kinematic error Calibration Machine learning Recurrent neural network(RNN)

Labdane Diterpenoids from Coleus forskohlii （Willd.） Briq.

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2006年第4期48卷 478-481页

作者： ling-ling Xu ling-Yi kong Department of Natural Medicinal Chemistry China Pharmaceutical University Nanjing 210009 China

in order to investigate the active substances of Coleus forskohlii（Wiiid.） Brlq., a new labdane dlterpenold, 12- hydroxy-8,*** acid, together with two 8,13-epoxylabd-14-ene-11-one dlterpenolds, 6-acetyl-1- deoxyforskolln and 6-acetyl-1,9-dldeoxyforskolln, was Isolated on the basis of various chromatographic technlques and spectroscopic methods.

关键词： 6-acetyl-1-deoxyforskolin 6-acetyl-1 ,9-dideoxyforskolin Coleus forskohlii 12-hydroxy-8,13E-labdadien-15-oic acid labdane diterpenoid.

Improved thermal conductivity and breakdown strength of PVDF-based composites by improving the dispersion of BN

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High Voltage 2022年第3期7卷 595-605页

作者： Yanxin Li zhuo Wang Menglei kong Zhihui Yi School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi'anChina

In order to adapt to the development of electronic devices,it is necessary to improve the thermal conductivity and breakdown strength of *** nitride(BN)is an ideal candidate material with high breakdown strength and thermal ***-fore,the introduction of BN nanosheets into the polyvinylidene fluoride(PVDF)matrix can improve the thermal conductivity and breakdown strength of the composites at the same ***,BN nanosheets can easily agglomerate in the matrix,which limits the improvement of the properties of the *** overcome this difficulty,appropriate water-bath heating was used to improve the fluidity of ***,the dispersion of the filler is *** the volume fraction of BN nanosheets is 3%and the preparation temperature is 45℃,the energy storage density of the compos-ites reached 18.5 J/cm^(3) at 540 kV/*** this point,the thermal conductivity was 0.49 W/(m⋅K),3.5 times that of the pure PVDF film.

关键词： composites conductivity strength

Effect of strain-gradients of surface micro-beams on frequency-shift of a quartz crystal resonator under thickness-shear vibrations

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2015年第5期31卷 647-652页

作者： ling-Cheng kong Yuan-Tai Hu Department of Mechanics Huazhong University of Science and Technology

With introduction of the first-order strain-gradient of surface micro-beams into the energy density function,we developed a two-dimensional dynamic model for a compound quartz crystal resonator（QCR） system,consisting of a QCR and surface micro-beam *** frequency shift that was induced by micro-beams with consideration of strain-gradients is discussed in detail and some useful results are obtained,which have important significance in resonator design and applications.

关键词： Micro-beams Strain-gradient Quartz crystal resonator Frequency shift