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不同矢状骨性错畸形牙弓及基骨宽度的比较研究

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成都医学院学报 2024年第1期19卷 28-33页

作者：徐舒豪彭薇黄诗言李小兵德阳市人民医院口腔科德阳618000 德阳市人民医院放射科德阳618000 北京大学口腔医学院·口腔医院第二门诊部北京100081 四川大学华西口腔医院儿童口腔科•口腔疾病研究国家重点实验室•国家口腔疾病临床医学中心成都610041

目的通过测量不同矢状骨性错畸形患者锥形束CT(CBCT)的牙弓及基骨宽度数据并作对比分析,从而揭示不同矢状骨性错畸形患者的牙弓及基骨宽度间的差异和相关性。方法选取2020年1月至2023年2月于德阳市人民医院口腔科/口腔正畸专科就诊... 详细信息

目的通过测量不同矢状骨性错畸形患者锥形束CT(CBCT)的牙弓及基骨宽度数据并作对比分析,从而揭示不同矢状骨性错畸形患者的牙弓及基骨宽度间的差异和相关性。方法选取2020年1月至2023年2月于德阳市人民医院口腔科/口腔正畸专科就诊的165例骨性Ⅰ类、150例骨性Ⅱ类及102例骨性Ⅲ类错畸形患者的CBCT,测量其牙弓及基骨宽度数据;以单因素方差分析及LSD法分析不同矢状骨性错畸形患者的牙弓及基骨宽度的差异,以Pearson检验分析牙弓与基骨宽度之间的相关性。结果与骨性Ⅰ类患者相比,骨性Ⅱ类患者的下颌牙弓宽度(-1.75±0.38)mm及基骨宽度(-3.23±0.43)mm均更小,差异有统计学意义(P<0.001);而骨性Ⅲ类患者的下颌牙弓宽度(1.57±0.42)mm及基骨宽度(3.85±0.48)mm均更大,差异有统计学意义(P<0.001);3种不同矢状骨性错畸形患者的上下颌牙弓与基骨宽度之间均存在一定相关性(P<0.001)。结论骨性Ⅱ类患者的下颌牙弓及基骨较骨性Ⅰ类患者更窄,而骨性Ⅲ类患者的下颌牙弓及基骨较骨性Ⅰ类患者更宽大,牙弓与基骨宽度相匹配。

关键词：错畸形牙弓基骨锥形束CT

Microstructure and Tribological Properties of Fe-Cr-B-Si-based Alloy Coating on the Surface of Scraper Conveyor Middle Trough NM450

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Journal of Wuhan University of Technology(Materials Science) 2020年第5期35卷 967-972页

作者： LI Junxia ZHANG Hongyu ZHANG Hongbin YANG xiaobing ZHANG wei LIU Libo College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Shandong Province Key Laboratory of Mine Mechanical Engineering Shandong University of Science and TechnologyQingdao 266590China JMC Heavy Duty Vehicle Co. LtdTaiyuan 030024China

This paper aims to develop a surface modification process to improve the surface properties of the middle *** coatings were prepared by plasma cladding with Fe-Cr-B-Si-based alloy powders (Ig 6 and Ig7).The organizational structure and micro-hardness of the coatings were analyzed by laboratory *** friction and wear tests were performed to investigate the friction-wear properties of middle *** coatings have higher hardness and good friction-wear properties than the *** hardness and friction wear properties of the coating with Ig7 powder are better than those with Ig6 *** experimental results show that the surface properties of the middle trough are improved by Fe-Cr-B-Si-based alloy coating,which can improve the middle trough service *** plasma cladding can be widely used in the surface-modification of middle trough to reduce the waste of resources.

关键词： plasma cladding coating NM450 substrate alloy powders friction/wear micro-structure

Unsupervised Graph-Based Tibetan Multi-Document Summarization

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Computers, Materials & Continua 2022年第10期73卷 1769-1781页

作者： Xiaodong Yan Yiqin Wang wei Song xiaobing Zhao A.Run Yang Yanxing School of Information and Engineering Minzu University of ChinaBeijing100081China National Language Resource Monitoring&Research Center Minority Languages BranchBeijing100081China University of California IrvineCalifornia92617USA Department of Physics New Jersey Institute of TechnologyNewarkNew Jersey07102-1982USA

Text summarization creates subset that represents the most important or relevant information in the original content,which effectively reduce information *** neural network method has achieved good results in the task of text summarization both in Chinese and English,but the research of text summarization in low-resource languages is still in the exploratory stage,especially in ***’s more,there is no large-scale annotated corpus for text *** lack of dataset severely limits the development of low-resource text *** this case,unsupervised learning approaches are more appealing in low-resource languages as they do not require labeled *** this paper,we propose an unsupervised graph-based Tibetan multi-document summarization method,which divides a large number of Tibetan news documents into topics and extracts the summarization of each *** obtained by using traditional graph-based methods have high redundancy and the division of documents topics are not detailed *** terms of topic division,we adopt two level clustering methods converting original document into document-level and sentence-level graph,next we take both linguistic and deep representation into account and integrate external corpus into graph to obtain the sentence semantic *** the shortcomings of the traditional K-Means clustering method and perform more detailed clustering of *** model sentence clusters into graphs,finally remeasure sentence nodes based on the topic semantic information and the impact of topic features on sentences,higher topic relevance summary is *** order to promote the development of Tibetan text summarization,and to meet the needs of relevant researchers for high-quality Tibetan text summarization datasets,this paper manually constructs a Tibetan summarization dataset and carries out relevant *** experiment results show that our method can effectively improve the

关键词： Multi-document summarization text clustering topic feature fusion graphic model

A draft sequence of the rice (Oryza sativa ssp. indica) genome

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Chinese Science Bulletin 2001年第23期46卷 1937-1942页

作者： YU Jun, HU Songnian, WANG Jun,LI Songgang WONG Ka-Shu Gane, LIU Bin,DENG Yajun, DAI Li, ZHOU Yan,ZHANG Xiuqing, CAO Mengliang, LIU Jing,SUN Jiandong , TANG Jiabin, CHEN Yanjiong,HUANG xiaobing, LIN wei, YE Chen, TONG wei,CONG Lijuan, GENG Jianing, HAN Yujun, LI Lin,LI wei, HU Guangqiang, HUANG Xiangang,LI Wenjie, LI Jian, LIU Zhanwei, LI Long,LIU Jianping, Ql Qiuhui, LIU Jinsong, LI Li,WANG Xuegang, LU Hong, WU Tingling,ZHU Miao, Nl Peixiang, HAN Hua, DONG wei,REN Xiaoyu, FENG Xiaoli, GUI Peng,LI Xianran, WANG Hao, XU Xin, ZHAI Wenxue,XU Zhao, ZHANG Jinsong, HE Sijie,ZHANG Jianguo, XU Jichen, ZHANG Kunlin,ZHENG Xianwu, DONG Jianhai, ZENG Wanyong,TAO Lin, CHEN Xuewei, HE Jun, LIU Daofeng,TIAN wei, TIAN Chaoguang, XIA Hongai,LI Gang, GAO Hui, LI Ping, CHEN wei ,WANG Xudong, ZHANG Yong, HU Jianfei,WANG Jing, LIU Song, YANG Jian,ZHANG Guangyu, XIONG Yuqing, LI Zhijie,MAO Long, ZHOU Chengshu, ZHU Zhen,CHEN Runsheng, HAO Bailin,ZHENG weimou, CHEN Shouyi, QUO wei,LI Guojie, LIU Siqi, HUANG Guyang,TAO Ming, WANG Jian, ZHU Lihuang,YUAN Longping& YANG HuanmingBeijing Genomics Institute/Center of Genomics & Bioinformatics, Chinese Academy of Sciences, Beijing 101300, China Hangzhou Genomics Institute/Institute of Bioinformatics of Zhejiang University/Key Laboratory of Bioinformatics of Zhejiang Province, Hangzhou 310007, China Institute of Genetics, Chinese Academy of Sciences, Beijing 100101, China National Hybrid Rice R & D Center, Changsha 410125, China Laboratory of Bioinformatics, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China College of Life Sciences, Peking University, Beijing 100871, China Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 1Q0080, China Digital China Ltd., Beijing 100080, China Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080, China Medical College, Xi’an Jiaotong University, Xi’an 710061, ChinaThese authors contributed equally to this work.Corresponding author.Corresponden Beijing Genomics Institute/Center of Genomics & Bioinformatics Chinese Academy of Sciences Beijing China Hangzhou Genomics Institute/Institute of Bioinformatics of Zhejiang University/Key Laboratory of Bioinformatics of Zhejiang Province Hangzhou China College of Life Sciences Peking University Beijing China Medical College Xi’an Jiaotong University Xi’an China Institute of Genetics Chinese Academy of Sciences Beijing China Laboratory of Bioinformatics Institute of Biophysics Chinese Academy of Sciences Beijing China National Hybrid Rice R & D Center Changsha China Institute of Theoretical Physics Chinese Academy of Sciences Beijing China Digital China Ltd. Beijing China Institute of Computing Technology Chinese Academy of Sciences Beijing China

The sequence of the rice genome holds fundamental information for its biology, including physiology, genetics, development, and evolution, as well as information on many beneficial phenotypes of economic significance. Using a "whole genome shotgun" approach, we have pro-duced a draft rice genome sequence of Oryza sativa ssp. in-dica, the major crop rice subspecies in China and many other regions of Asia. The draft genome sequence is constructed from over 4.3 million successful sequencing traces with an accumulative total length of 2214.9 Mb. The initial assembly of the non-redundant sequences reached 409.76 Mb in length, based on 3.30 million successful sequencing traces with a total length of 1797.4 Mb from an indica variant cultivar 93-11, giving an estimated coverage of 95.29% of the rice genome with an average base accuracy of higher than 99%. The coverage of the draft sequence, the randomness of the sequence distribution, and the consistency of BIG-ASSEM-BLER, a custom-designed software package

关键词： rice genome draft sequences.

Review of Nodule Mineral Image Segmentation Algorithms for Deep-Sea Mineral Resource Assessment

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Computers, Materials & Continua 2022年第10期73卷 1649-1669页

作者： wei Song Lihui Dong xiaobing Zhao Jianxin Xia Tongmu Liu Yuxi Shi School of Information and Engineering Minzu University of ChinaBeijing100081China Key Laboratory of Marine Environmental Survey Technology and Application Ministry of Natural ResourceGuangzhou510300China National Language Resource Monitoring&Research Center of Minority Languages Minzu University of ChinaBeijing100081China School of Ocean Science China University of GeosciencesBeijing100191China Department of Buoy Engineering South China Sea Marine Survey and Technology Center of State Oceanic AdministrationGuangzhou510310China Department of Electrical and Computer Engineering New Jersey Institute of TechnologyNewarkNJ07102USA

A large number of nodule minerals exist in the deep *** on the factors of difficulty in shooting,high economic cost and high accuracy of resource assessment,large-scale planned commercial mining has not yet been *** experimental mining has been carried out in areas with high mineral density and obvious benefits after mineral resource *** an efficient method for deep-sea mineral resource assessment,the deep towing system is equipped with a visual system for mineral resource analysis using collected images and videos,which has become a key component of resource ***,high accuracy in deep-sea mineral image segmentation is the primary goal of the segmentation *** this paper,the existing deep-sea nodule mineral image segmentation algorithms are studied in depth and divided into traditional and deep learning-based segmentation methods,and the advantages and disadvantages of each are compared and *** deep learning methods show great advantages in deep-sea mineral image segmentation,and there is a great improvement in segmentation accuracy and efficiency compared with the traditional ***,the mineral image dataset and segmentation evaluation metrics are ***,possible future research topics and improvement measures are discussed for the reference of other researchers.

关键词： Polymetallic nodule deep-sea mining image segmentation deep learning

IgA肾病患者肾小球系膜组织P21、P27、PCNA表达与肾病预后不良的关系分析

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中国免疫学杂志 2024年第3期40卷 610-614页

作者：廖敏宋勇波魏卓刘小兵程魁范哲奇双松涛祝存海孝感市中心医院泌尿外科武汉科技大学附属孝感医院孝感432100

目的:探讨免疫球蛋白A(IgA)肾病患者肾小球系膜组织P21、P27、增殖细胞核抗原(PCNA)表达与肾脏预后不良的关系。方法:选取2017年4月至2019年8月孝感市中心医院收治的145例IgA肾病患者作为研究对象,采用免疫组化法检测肾小球系膜组织P21... 详细信息

目的:探讨免疫球蛋白A(IgA)肾病患者肾小球系膜组织P21、P27、增殖细胞核抗原(PCNA)表达与肾脏预后不良的关系。方法:选取2017年4月至2019年8月孝感市中心医院收治的145例IgA肾病患者作为研究对象,采用免疫组化法检测肾小球系膜组织P21、P27、PCNA的表达。所有患者均接受跟踪随访24个月,统计预后情况,对比不同预后患者肾小球系膜组织P21、P27、PCNA的表达,并采用Logistic回归分析法分析IgA肾病患者预后不良的影响因素。结果:IgA肾病患者肾小球系膜组织P21、P27、PCNA阳性细胞表达率分别为(38.69±6.83)%、(55.94±8.08)%、(33.47±5.72)%;IgA肾病患者预后不良发生率为17.24%,预后不良患者肾小球系膜组织P21、PCNA阳性细胞表达率均高于预后良好组(P<0.05),P27阳性细胞表达率低于预后良好组(P<0.05);经Logistic多元回归分析显示,舒张压升高、24 h蛋白尿增多、系膜细胞增生、节段性肾小球硬化、肾小管萎缩/间质纤维化、新月体与P21、PCNA阳性表达率升高、P27阳性细胞表达率降低均是影响IgA肾病患者预后不良的危险因素(P<0.05)。结论:IgA肾病肾小球系膜组织存在P21、P27、PCNA阳性表达,IgA肾病预后不良患者肾小球系膜组织P21、PCNA阳性细胞表达率均高于预后良好者,P27蛋白阳性细胞表达率低于预后良好者,且均为IgA肾病患者预后不良的危险因素。

关键词： IgA肾病 P21 P27 增殖细胞核抗原肾小球硬化

农田耕整载荷六维力传感器结构优化与解耦研究

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农业机械学报 2024年第2期55卷 28-35,89页

作者：陈伟张晓袁栋朱继平陈小兵曹光乔农业农村部南京农业机械化研究所南京210014

针对农田耕整载荷大、测量精度低等问题,在经典十字梁结构基础上,设计了一种辐梁式六维力传感器,可同时测量力和力矩,通过仿真方法对传感器结构进行了优化,确定了应变梁长、宽、高分别为9、10、6 mm;分析了传感器结构在载荷下的应变能力... 详细信息

针对农田耕整载荷大、测量精度低等问题,在经典十字梁结构基础上,设计了一种辐梁式六维力传感器,可同时测量力和力矩,通过仿真方法对传感器结构进行了优化,确定了应变梁长、宽、高分别为9、10、6 mm;分析了传感器结构在载荷下的应变能力,确定了应变片贴片位置。对传感器开展了静态标定试验,基于标定数据采用改进型XGBoost(Extreme gradient boosting)机器学习网络对力信号进行解耦,并与常规网络进行比对。试验结果表明,改进型XGBoost模型在X、Y、Z方向力和力矩6种加载方式的测试集决定系数R^(2)_(P)分别达到0.9804、0.9418、0.9434、0.9868、0.9969、0.9822,预测效果较好,避免了陷入局部最优解。改进型XGBoost模型在六维加载力、力矩的R^(2)_(P)、测试集平均绝对误差(MAEP)均明显优于随机森林模型、传统多元线性回归,相较于传统多元线性回归方式,六维加载力、力矩的R^(2)_(P)分别提升22.57%、20.99%、23.32%、26.27%、26.05%、18.72%。基于机器学习的解耦算法可明显减少耦合误差的影响,提高传感器的测量精度,为农机优化提供了技术支撑。

关键词：农田耕整载荷辐梁式传感器结构优化解耦算法机器学习

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Degradation of organic matterin the sediments of Hongfeng Reservoir

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Chinese Science Bulletin 2005年第20期50卷 2377-2380页

作者： wei Zhongqing LIU Congqiang LIANG xiaobing WANG Fushun WANG Shaofeng State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

In this work, the distribution of organic carbon, DNA and lipids in the sediments of Hongfeng Reservoir were described in addition to SO42? profile in pore water. The con- tents of organic carbon in the sediments range from 23.3 to 76.8 mg·g?1, with the peak value appearing at the depth of 8 cm bellow the sediments water interface (SWI), and tend to decrease gradually with sedimentation depth. The concentra- tions of SO42? decreased from 40.50 mg·L?1 to 12.00 mg·L?1 at SWI in top 4 cm sediment, and was kept at 12.0 mg·L?1 bel- low that depth. Newly produced organic carbon can be con- served as long as 14 years in the sediments. The contents of DNA were relatively high in top 9 cm surface sediments, as revealed by agarose gel images, close to those of organic car- bon and sulphate reduction index (SRI). This study shows that bacteria played an important role in organic matter degradation; SO42? is the primary electron acceptor under anaerobic condition in this reservoir; DNA in the lake sedi- ments can provide important information for the study of cycling of nutrient elements in the lake.

关键词：湖泊有机物沉积物电泳现象硫酸盐

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测井仪被动式热管理系统室温冷却研究

石油钻探技术 2024年第1期52卷 146-154页

作者：田志宾彭嘉乐鄢星宇魏赞庆杨庚佳罗小兵中海油田服务股份有限公司油田技术研究院河北三河065201 华中科技大学能源与动力工程学院湖北武汉430074

被动式热管理系统能使测井仪内部电子器件的温度在工作时间内不超过耐温指标,然而热管理系统优异的隔热性能导致测井仪需要较长时间冷却,才能投入下一次工作。为此,提出了一种针对测井仪的室温冷却方案。通过将电路骨架从保温瓶内抽出... 详细信息

被动式热管理系统能使测井仪内部电子器件的温度在工作时间内不超过耐温指标,然而热管理系统优异的隔热性能导致测井仪需要较长时间冷却,才能投入下一次工作。为此,提出了一种针对测井仪的室温冷却方案。通过将电路骨架从保温瓶内抽出置于空气中实现快速冷却,同时设置芯片保护壳避免内部电子器件与空气直接接触,能够避免较高温差所产生的热应力及水蒸气液化对内部电子器件的损坏,实现快速冷却。模拟和试验验证了该方案的可行性,同时模拟探究了不同因素对冷却方案效果的影响,确定了最佳的冷却方案。研究结果表明,所提出的室温冷却方案可以解决测井仪被动式热管理系统冷却散热的问题,提高测井工作的效率。

关键词：测井仪室温被动式热管理保护壳冷却速率