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Maize(Zea mays L.)seedling detection based on the fusion of a modified deep learning model and a novel Lidar points projecting strategy

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International Journal of Agricultural and Biological Engineering 2022年第5期15卷 172-180页

作者： Gang Wang Dongyan Huang Deyi Zhou Huili Liu minghao qu Zhongyang Ma College of Biological and Agricultural Engineering Jilin UniversityChangchun 130022China Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China

Accurate crop detection is the prerequisite for the operation of intelligent agricultural *** recognition usually lacks accurate orientation information,and Lidar point clouds are not easy to distinguish different ***,the fusion of images and Lidar points can complement each *** research aimed to detect maize(Zea mays L.)seedlings by fusing Lidar data with *** applying coordinate transformation and time stamps,the images and Lidar points were realized homogeneous in spatial as well as temporal *** learning was used to develop a maize seedling recognition model,then the model recognized maize seedlings by labeling them with bounding ***,Lidar points were mapped to the bounding *** one-third of points that fell into the right middle of bounding boxes were selected for clustering operation,the calculated center of the cluster provided spatial information for target maize *** study modified the classical single shot multi-box detector(SSD)by merely linking the last feature map to the final output layer,owing to the higher feature maps having the unique advantages of detecting relatively larger *** images,maize seedlings were just the largest objects owing to be shot on *** modification enabled the recognition model to finish recognizing an image by only consuming around 60 ms,which saved about 10 ms/image compared with the classical SSD *** experiment was conducted in a maize field,and the maize was during the elongation *** results demonstrated that the standard deviations for maximum distance error and maximum angle error were 1.4 cm and 1.1°,respectively,which can be tolerated under current technical *** agricultural fields are subject to staple crop-orientated and changeable ambient environment,the fusion of images and Lidar points can derive more precision information,and make agricultural machinery *** study can act as an

关键词： maize seedling detection fusion deep learning Lidar

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Osteoarthritis:pathogenic signaling pathways and therapeutic targets

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Signal Transduction and Targeted Therapy 2023年第3期8卷 932-962页

作者： Qing Yao Xiaohao Wu Chu Tao Weiyuan Gong Mingjue Chen minghao qu Yiming Zhong Tailin He Sheng Chen Guozhi Xiao Department of Biochemistry School of MedicineShenzhen Key Laboratory of Cell MicroenvironmentGuangdong Provincial Key Laboratory of Cell Microenvironment and Disease ResearchSouthern University of Science and TechnologyShenzhen 518055China Department of Orthopaedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

Osteoarthritis(OA)is a chronic degenerative joint disorder that leads to disability and affects more than 500 million population *** was believed to be caused by the wearing and tearing of articular cartilage,but it is now more commonly referred to as a chronic whole-joint disorder that is initiated with biochemical and cellular alterations in the synovial joint tissues,which leads to the histological and structural changes of the joint and ends up with the whole tissue ***,there is no cure for OA,partly due to a lack of comprehensive understanding of the pathological mechanism of the initiation and progression of the ***,a better understanding of pathological signaling pathways and key molecules involved in OA pathogenesis is crucial for therapeutic target design and drug *** this review,we first summarize the epidemiology of OA,including its prevalence,incidence and burdens,and OA risk *** then focus on the roles and regulation of the pathological signaling pathways,such as Wnt/β-catenin,NF-κB,focal adhesion,HIFs,TGFβ/ΒΜP and FGF signaling pathways,and key regulators AMPK,mTOR,and RUNX2 in the onset and development of *** addition,the roles of factors associated with OA,including MMPs,ADAMTS/ADAMs,and PRG4,are discussed in ***,we provide updates on the current clinical therapies and clinical trials of biological treatments and drugs for *** advances in basic knowledge of articular cartilage biology and OA pathogenesis will have a significant impact and translational value in developing OA therapeutic strategies.

关键词： therapeutic Osteoarthritis epidemiology

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OsWR2 recruits HDA704 to regulate the deacetylation of H4K8ac in the promoter of OsABI5 in response to drought stress

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Journal of Integrative Plant Biology 2023年第7期65卷 1651-1669页

作者： Yalu Guo Yiqing Tan minghao qu Kai Hong Longjun Zeng Lei Wang Chuxiong Zhuang Qian Qian Jiang Hu Guosheng Xiong Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural SciencesShenzhen 518120China Guangdong Laboratory for Lingnan Modern Agriculture State Key Laboratory for Conservation and Utilization of Subtropical Agro‐bioresourcesCollege of Life SciencesSouth China Agricultural UniversityGuangzhou 510642China Plant Phenomics Research Center Academy of Advanced Interdisciplinary StudiesNanjing Agricultural UniversityNanjing 210095China College of Animal Science and Technology Southwest UniversityChongqing 402460China Yichun Academy of Sciences Yinchun 336000China Center for Agricultural Resources Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuang 050022China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310000China

Drought stress is a major environmental factor that limits the growth, development, and yield of rice(Oryza sativa L.). Histone deacetylases(HDACs) are involved in the regulation of drought stress responses. HDA704 is an RPD3/HDA1 class HDAC that mediates the deacetylation of H4K8(lysine 8of histone H4) for drought tolerance in rice. In this study, we show that plants overexpressing HDA704(HDA704-OE) are resistant to drought stress and sensitive to abscisic acid(ABA), whereas HDA704 knockout mutant(hda704) plants displayed decreased drought tolerance and ABA *** analysis revealed that HDA704 regulates the expression of ABA-related genes in response to drought stress. Moreover, HDA704 was recruited by a drought-resistant transcription factor,WAX SYNTHESIS REGULATORY 2(Os WR2), and co-regulated the expression of the ABA biosynthesis genes NINE-CIS-EPOXYCAROTENOID DIOXYGENASE 3(NCED3), NCED4, and NCED5 under drought stress. HDA704 also repressed the expression of ABA-INSENSITIVE 5(Os ABI5) and DWARF AND SMALL SEED 1(Os DSS1) by regulating H4K8ac levels in the promoter regions in response to polyethylene glycol 6000 treatment. In agreement, the loss of Os ABI5 function increased resistance to dehydration stress in rice. Our results demonstrate that HDA704 is a positive regulator of the drought stress response and offers avenues for improving drought resistance in rice.

关键词： drought stress HDA704 histone acetylation OsABI5 OsWR2 rice

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Kindlin-2 loss in condylar chondrocytes causes spontaneous osteoarthritic lesions in the temporomandibular joint in mice

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International Journal of Oral Science 2022年第3期14卷 371-380页

作者： Yumei Lai Wei Zheng minghao qu Christopher C.Xiao Sheng Chen Qing Yao Weiyuan Gong Chu Tao Qinnan Yan Peijun Zhang Xiaohao Wu Guozhi Xiao Department of Orthopedic Surgery Rush University Medical CenterChicagoILUSA Department of Orthopaedic Center Xinjiang Production and Construction Corps HospitalUrumqiChina Department of Biochemistry School of MedicineSouthern University of Science and TechnologyGuangdong Provincial Key Laboratory of Cell Microenvironment and Disease ResearchShenzhen Key Laboratory of Cell MicroenvironmentShenzhenChina Department of Orthopedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina

The progressive destruction of condylar cartilage is a hallmark of the temporomandibular joint(TMJ) osteoarthritis(OA);however, its mechanism is incompletely understood. Here, we show that Kindlin-2, a key focal adhesion protein, is strongly detected in cells of mandibular condylar cartilage in mice. We find that genetic ablation of Kindlin-2 in aggrecan-expressing condylar chondrocytes induces multiple spontaneous osteoarthritic lesions, including progressive cartilage loss and deformation, surface fissures, and ectopic cartilage and bone formation in TMJ. Kindlin-2 loss significantly downregulates the expression of aggrecan, Col2a1 and Proteoglycan 4(Prg4), all anabolic extracellular matrix proteins, and promotes catabolic metabolism in TMJ cartilage by inducing expression of Runx2and Mmp13 in condylar chondrocytes. Kindlin-2 loss decreases TMJ chondrocyte proliferation in condylar cartilages. Furthermore,Kindlin-2 loss promotes the release of cytochrome c as well as caspase 3 activation, and accelerates chondrocyte apoptosis in vitro and TMJ. Collectively, these findings reveal a crucial role of Kindlin-2 in condylar chondrocytes to maintain TMJ homeostasis.

关键词： Kindlin-2 loss in condylar chondrocytes causes spontaneous osteoarthritic lesions in the temporomandibular joint in mice TMJ

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A Strigolactone Biosynthesis Gene Contributed to the Green Revolution in Rice

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Molecular Plant 2020年第6期13卷 923-932页

作者： Yuexing Wang Lianguang Shang Hong Yu Longjun Zeng Jiang Hu Shen Ni Yuchun Rao Sanfeng Li Jinfang Chu Xiangbing Meng Lei Wang Ping Hu Jijun Yan Shujing Kang minghao qu Hai Lin Tao Wang quan Wang Xingming Hu Hongqi Chen Bing Wang Zhenyu Gao Longbiao Guo Dali Zeng Xudong Zhu Guosheng Xiong Jiayang Li Qian Qian State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China State Key Laboratory of Plant Genomics and National Center for Plant Gene Research(Beijing)Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Plant Phenomics Research Center Nanjing Agricultural UniversityNanjing 210095China College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua 321004China

Plant architecture is a complex agronomic trait and a major factor of crop yield,which is affected by several important ***(SLs)are identified as a new class hormoneinhibiting branching in many plant species and have been shown to be involved in various developmental *** and chemical modulation of the SL pathway is recognized as a promising approach to modify plant ***,whether and how the genes involved in the SL pathway could be utilized in breeding still remain ***,we demonstrate that a partial loss-of-function allele of the SL biosynthesis gene,HIGH TILLERING AND DWARF 1/DWARF17(HTD1/D17),which encodes CAROTENOID CLEAVAGE DIOXYGENASE 7(CCD7),increases tiller number and improves grain yield in *** found that the HTD1 gene had been widely utilized and co-selected with Semidwarf 1(SD1),both contributing to the improvement of plant architecture in modern rice varieties since the Green Revolution in the *** how phytohormone pathway genes regulate plant architecture and how they have been utilized and selected in breeding will lay the foundation for developing the rational approaches toward improving crop yield.

关键词： rice strigolactones tiller number Green Revolution

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氢等离子体处理钝化层对高效晶硅异质结太阳电池性能的影响

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太阳能学报 2022年第7期43卷 140-144页

作者：刘欢由甲川赵雷王文静曲铭浩徐希翔中国科学院太阳能热利用及光伏系统重点实验室中国科学院电工研究所北京100190 中国科学院大学北京100049 洁净能源国家实验室大连116023 汉能薄膜发电集团成都研发中心成都610200

研究不同时间氢等离子体处理(HPT)氢化非晶硅a-Si:H(i)钝化层对高效晶硅异质结太阳电池(效率>23%)性能的影响。发现适当时间的HPT可改善钝化效果提升电池性能,但过长时间的HPT可导致薄膜钝化效果变差,有效少数载流子寿命降低。分析认为... 详细信息

研究不同时间氢等离子体处理(HPT)氢化非晶硅a-Si:H(i)钝化层对高效晶硅异质结太阳电池(效率>23%)性能的影响。发现适当时间的HPT可改善钝化效果提升电池性能,但过长时间的HPT可导致薄膜钝化效果变差,有效少数载流子寿命降低。分析认为HPT时间过长,H原子进入到a-Si:H(i)薄膜层中,导致薄膜内部SiH2增多,微结构因子(R)增大,薄膜质量变差。并且,适当时间的HPT改善太阳电池性能的幅度有限,而过长时间的HPT导致电池性能下降却很明显。因此,针对高效率的晶硅异质结太阳电池,应对钝化层沉积之后的HPT工艺进行谨慎控制。

关键词：晶硅异质结太阳电池 PECVD 氢等离子体处理钝化

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高校培育产业创客的行动方略

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现代教育科学 2021年第1期 97-100,107页

作者：曲洺皞陈飞宇白城师范学院体育学院吉林白城137000 白城市特殊教育学校吉林白城137000

高校培育产业创客的创客教育是伴随创新创业教育的实施而开展的。实施创客教育,培育产业创客,主要源于漫灌式的创新创业教育、点缀式的创新创业课程、运动式的创新创业大赛、碎片式的创新创业活动。短缺的创业导师及虚化的创新创业组织... 详细信息

高校培育产业创客的创客教育是伴随创新创业教育的实施而开展的。实施创客教育,培育产业创客,主要源于漫灌式的创新创业教育、点缀式的创新创业课程、运动式的创新创业大赛、碎片式的创新创业活动。短缺的创业导师及虚化的创新创业组织没有提升高校毕业生的创新创业素质,创业带动就业的倍增效应没有显现出来。培育产业创客就是要构建“理论学习、创意激发、技能培训、项目实践、融资对接到孵化落地”的全链条、全方位的产业创客培育体系,使创新创业及创客教育能走出理论说教阶段及封闭的教室、创客空间,达到理实结合、虚实一体、想做融合,让学生在“学习、思考、行动、致用、创造”中实现发展,从而发挥创业带动就业的倍增效应。

关键词：产业创客培育体系创业带动就业倍增效应

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高介电氧化钽薄膜制备与介电性能分析

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陶瓷学报 2009年第2期30卷 182-185页

作者：曲铭浩胡跃辉冯景华谢耀江王立富景德镇陶瓷学院景德镇333001

在较低衬底温度下,通过磁控溅射得到的非晶态Ta2O5薄膜,在氧气氛750℃条件下进行化学热退火,得到晶化的Ta2O5薄膜,其相对介电常数为34.3,漏电流密度小于10-7A/cm2。电容量测试时,为了较好地消除高温退火时产生的SiO2的介质层对电容测试... 详细信息

在较低衬底温度下,通过磁控溅射得到的非晶态Ta2O5薄膜,在氧气氛750℃条件下进行化学热退火,得到晶化的Ta2O5薄膜,其相对介电常数为34.3,漏电流密度小于10-7A/cm2。电容量测试时,为了较好地消除高温退火时产生的SiO2的介质层对电容测试值的影响,用不同厚度氧化钽薄膜为介质层做成金属-绝缘体-金属(MIM)结构的电容器,对这些电容器的电容测试数据,进行Sigmoidal拟合,得到极限电容,从而计算出Ta2O5薄膜的介电常数。

关键词：氧化钽薄膜介电常数漏电流密度

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A New Random Sampling Method and Its Application in Improving Progressive BKZ Algorithm

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Journal of Systems Science & Complexity 2024年第5期37卷 2262-2292页

作者： SUN minghao WANG Shixiong CHEN Hao qu Longjiang College of Sciences National University of Defense TechnologyChangsha 410073China Academy of Military Sciences Beijing 100091China College of Information Science and Technology/Cyber Security Jinan UniversityGuangzhou 510632China

Random sampling algorithm was proposed firstly by Schnorr in 2003 to find short lattice vectors,as an alternative to *** follow-up developments in random sampling were mainly proposed by Fukase and Kashiwabara in 2015 and Aono and Nguyen in *** they extended the sampling space compared to Schnorr's work through the natural number representation,they did not show how to sample specifically in practice and what vectors should be sampled,in order to find short enough lattice *** this paper,the authors firstly introduce a practical random sampling algorithm under some reasonable assumptions which can find short enough lattice vectors ***,as an application of this new random sampling algorithm,the authors show that it can improve the performance of progressive BKZ algorithm in ***,the authors solve the Darmstadt's Lattice Challenge and get a series of new records in the dimension from 500 to 825,using the improved progressive BKZ algorithm.

关键词： Darmstadt’s lattice challenge lattice lattice reduction algorithm post-quantum cryptography random sampling

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Different Types of Bone Fractures Observed by Terahertz Time-Domain Spectroscopy

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Acta Mechanica Solida Sinica 2024年第3期37卷 468-477页

作者： minghao Zhang Xianjia Meng Zhiyong Wang Chuanyong qu Chuan qu Donghui Fu Department of Mechanics Tianjin UniversityTianjin300072China Tianjin Key Laboratory of Modern Engineering Mechanics Tianjin300072China

Microcracks are common in compact bone,but their continued propagation can lead to macroscopic *** microcracks cannot be visualized radiographically,necessitating alternative noninvasive methods to identify excessive microcracking and prevent *** this study,terahertz time-domain spectroscopy(THz-TDS)was used to examine bone interiors near cracks resulting from loading in bovine tibia *** loading configurations,such as impact,quasi-static loading,and fatigue loading,known to induce different types of micro-scale damage,were *** values of refractive index and absorption coefficient of the bone samples were then determined from the THz-TDS spectra acquired before loading and after *** study revealed that different loading configurations led to varying terahertz optical coefficients associated with various types of bone ***,the refractive index notably increased under fatigue loading but remained relatively stable during quasi-static *** absorption coefficient of bone decreased only under fatigue ***,samples were subjected to axial and radial impacts without sustaining *** indicated that in the undamaged state,the change in refractive index was smaller compared to after impact failure,while the change in absorption coefficient remained consistent after *** radial impact loading,changes in refractive index and absorption coefficient were significantly more pronounced than under axial *** to loading,the measured value of refractive index was 2.72±0.11,and the absorption coefficient was 6.33±0.09 mm^(−1)at 0.5 THz.

关键词： Terahertz time-domain spectroscopy Bone Microdamage Noninvasive method

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