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2018年春霜冻对江西省北部茶叶生产影响的定量评估被引量：18
《气象与减灾研究》2019年第1期70-74,共5页陶瑶 杨爱萍 段里成 张坤 
2018年江西省气象局重点项目“特色农产品气候品质评价技术研究”
为探究江西省北部茶区春霜冻发生特点,深入开展茶叶春霜冻灾害定量评估工作,采用实地调查方式,获取江西省北部12个茶场2018年4月7—9日春霜冻的灾情资料和同期气象观测资料,采用加权求和法构建茶叶春霜冻灾害损失定量评估模型,对春霜冻...
关键词：春茶 春霜冻 损失 定量评估 
Synthesis and characterization of MoS2/Fe@Fe3O4 nanocomposites exhibiting enhanced microwave absorption performance at normal and oblique incidences被引量：2
《Journal of Materials Science & Technology》2019年第9期1931-1939,共9页Peng Wang Junming Zhang Guowu Wang Benfang Duan Donglin He Tao Wang Fashen Li 
financially supported by the National Natural Science Foundations of China (Nos. 11574122 and 51731001);the Fundamental Research Funds for the Central Universities (No. lzujbky-2017-k20)
Herein,we attempted to prepare MoS2/Fe@Fe3O4 nanocomposites capable of strongly absorbing broadband incident electromagnetic(EM)radiation and probed the effects of their composition on complex permittivity and permeab...
关键词：PERMITTIVITY PERMEABILITY Microwave absorption Electromagnetic loss Interface CANCELLATION 
High birefringence, low loss, and flattened dispersion photonic crystal fiber for terahertz application
《Chinese Physics B》2019年第11期394-398,共5页Dou-Dou Wang Chang-Long Mu De-Peng Kong Chen-Yu Guo 
Project supported by the National Natural Science Foundation of China(Grant No.11604260);the Outstanding Youth Science Fund of Xi’an University of Science and Technology,China(Grant No.2019YQ3-10)
A type of photonic crystal fiber based on Kagome lattice cladding and slot air holes in a rectangular core is investigated. Full vector finite element method is used to evaluate the modal and propagation properties of...
关键词：TERAHERTZ PHOTONIC crystal fiber BIREFRINGENCE LOSS DISPERSION 
Derivation of General Formula for Coupling Loss of Single-mode Fiber Collimators with Gradient-index Rod Lenses
《Semiconductor Photonics and Technology》2003年第4期215-220,共6页XIE Hu, LUO Feng guang, CAO Ming cui, YUAN Jing, WAN Zhu jun (State Key Lab.of Laser Technol.,Huazhong University of Sci.& Technol.,Wuhan 430074,CHN) 
NationalNaturalScienceFoundationofChina(6 0 1770 2 3)
Gradient-index rod lens (GRIN-lens) whose pitch is ordinary value with bevel ferrule coupling system is analyzed, an equivalent method which can be used to analyze this system is put forward, and a general formula for...
关键词：gradient―index rod lens single―mode fiber coupling loss COLLIMATOR 
Impact of <i>Cowpea mottle virus</i>on the Growth and Yield of Bambara Groundnut (<i>Vigna subterranean</i>(L.) Verdc.)
《American Journal of Plant Sciences》2018年第10期2053-2062,共10页Elisabeth Zongo Bouma James Néya Valentin Stanislas Edgar Traoré Essowé Palanga Jean Zabré Nicolas Barro Oumar Traoré 
Bambara groundnut [Vigna subterranean (L.) Verdc] is a food legume with high potential for food security in Sub-Saharan Africa. However, in addition to being a neglected crop, its production is limited by several cons...
关键词：Bambara Groundnut COWPEA MOTTLE VIRUS IMPACT Yield Loss 
The assessment of soil loss by water erosion in China被引量：25
《International Soil and Water Conservation Research》2020年第4期430-439,共10页Baoyuan Liu Yun Xie Zhiguang Li Yin Liang Wenbo Zhang Suhua Fu Shuiqing Yin Xin Wei Keli Zhang Zhiqiang Wang Yingna Liu Ying Zhao Qiankun Guo 
the National Key R&D Program 2018YFC0507000
Soil erosion is a major environmental problem in China.Planning for soil erosion control requires accurate soil erosion rate and spatial distribution information.The aim of this article is to present the methods and r...
关键词：National soil erosion survey CSLE Sample units Chinese soil loss map Soil erosion rate Ratio of soil erosion area 
海上反循环固井技术研究
《重庆科技学院学报（自然科学版）》2020年第6期51-56,共6页岳家平 刘兆年 幸雪松 武治强 
国家科技重大专项“海外重点油气田开发钻采关键技术”(2017ZX05032004);中海油研究总院自立课题“深水深层井钻井关键技术研究”(2019KJ-ZC02)。
针对海上低压易漏井、高温高压深井、深水井的固井作业中面临的漏失与水泥浆抗压强度发展缓慢等问题,从固井工艺、水力学、水泥浆设计等角度出发,通过固井压力分析、水泥浆性能分析及软件模拟等手段,分析反循环固井技术在海上油田固井...
关键词：反循环 固井 深水 水泥浆 漏失 高温高压 大温差 
课堂场景下学习者情感识别研究被引量：1
《智能计算机与应用》2020年第11期8-15,共8页苏超 王国中 
国家重点研发计划资助项目(2019YFB1802700);上海工程技术大学研究生创新计划资助项目(19KY0232)。
课堂上学生的面部表情和姿态是学习状态的一种自然流露,能够反映出学习者当前的学习状态。而传统的情感识别方法存在识别准确率低、特征提取困难以及实时性差等问题。针对上述问题,本文提出了一种基于表情和姿态的双模态情感识别模型。...
关键词：情感识别 Tiny_YOLOv3 SEnet GIoU loss K-MEANS 
基于PointNet的地铁盾构隧道点云典型要素分割被引量：3
《铁道建筑技术》2022年第12期159-163,共5页王兵海 
中国铁建股份有限公司科技重大专项(2019-A02)。
本文针对盾构隧道三维激光点云数据,利用PointNet点云识别算法,构建隧道要素分割的深度神经网络模型。基于各要素样本数据与隧道壁背景数据存在类别不平衡情况,首先通过InstanceHardnessThreshold算法对隧道壁数据进行采样,平衡类别比例...
关键词：盾构隧道 要素分割 PointNet focal loss InstanceHardnessThreshold采样 
In vivo imaging reveals a synchronized correlation among neurotransmitter dynamics during propofol and sevoflurane anesthesia被引量：2
《Zoological Research》2024年第3期679-690,共12页Gao-Lin Qiu Li-Jun Peng Peng Wang Zhi-Lai Yang Ji-Qian Zhang Hu Liu Xiao-Na Zhu Jin Rao Xue-Sheng Liu 
supported by the National Natural Science Foundation of China(81870841 and 82171192 to X.S.L.,82101349 to G.L.Q.)。
General anesthesia is widely applied in clinical practice.However,the precise mechanism of loss of consciousness induced by general anesthetics remains unknown.Here,we measured the dynamics of five neurotransmitters,i...
关键词：General anesthesia Loss of consciousness In vivo neurotransmitter imaging Medial prefrontal cortex Primary visual cortex 
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