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A pregnant patient with type II osteogenesis imperfecta pregnancy

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World Journal of Emergency Medicine 2024年第1期15卷 75-76页

作者： Chenyu Jiang chenyi Bao Shujuan Shu Department of Obstetrics Women’s HospitalSchool of MedicineZhejiang UniversityHangzhou 310006China

Osteogenesis imperfecta(OI)is a primary bone fragility disorder with an estimated prevalence of 1/15,000 births and is a hereditary syndrome characterized by one or more of the following:fractures,blue sclerae,impaired hearing,defective dentition,and hyperlaxibility throughout life.[1,2]We report a pregnant woman with type II OI and review her prenatal counseling,diagnosis,and pregnancy management to assist obstetricians in understanding the disease and managing it in emergency situations.

关键词： pregnancy impaired diagnosis

6DOF pose estimation of a 3D rigid object based on edge-enhanced point pair features

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Computational Visual Media 2024年第1期10卷 61-77页

作者： chenyi Liu Fei Chen Lu Deng Renjiao Yi Lintao Zheng Chenyang Zhu Jia Wang Kai Xu College of Computing National University of Defense TechnologyChangsha410073China Department of Spine Surgery the Second Xiangya HospitalCentral South UniversityChangsha410011China Clinical Nursing Teaching and Research Section the Second Xiangya HospitalChangsha410011China College of Meteorology and Oceanography National University of Defense TechnologyChangsha410073China Beijing Institute of Tracking and Communication Technology Beijing100094China

The point pair feature(PPF)is widely used for 6D pose *** this paper,we propose an efficient 6D pose estimation method based on the PPF *** introduce a well-targeted down-sampling strategy that focuses on edge areas for efficient feature extraction for complex geometry.A pose hypothesis validation approach is proposed to resolve ambiguity due to symmetry by calculating the edge matching *** perform evaluations on two challenging datasets and one real-world collected dataset,demonstrating the superiority of our method for pose estimation for geometrically complex,occluded,symmetrical *** further validate our method by applying it to simulated punctures.

关键词： point pair feature(PPF) pose estimation object recognition 3D point cloud

The Twin Bambili Maars (Bamenda Mountains, Cameroon Volcanic Line): Simulative Model of Formation

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Open Journal of Geology 2017年第4期7卷 443-456页

作者： Wotchoko Pierre Takojio Nguemo Rose Eugenie Kouankap Nono Gus Djibril Guedjeo Christian Suh Nkouathio David Guimollaire Bobga Stanley Babila chenyi marie-louise vohnyui Tchokona Seuwi dieudonne Suh Emmanuel Cheo Department of Geology Higher Teacher Training College University of Bamenda Bambili Cameroon Institut de Recherche Géologique et Minière Laboratoire de Traitement des Minerais Yaoundé Cameroon Department of Earth Sciences Faculty of Sciences University of Dschang Dschang Cameroon Department of Earth Sciences Faculty of Sciences University of Yaoundé 1 Yaoundé Cameroon Economic Geology Unit Department of Geology and Environmental Science University of Buea Buea Cameroon

The Bambili maars are twin contemporaneous maars embedded in trachytic rocks. The two maars are separated by a low lying inter-Maar dome whose inner walls dip towards the Southern Maar. The Bambili Northern Maar (BNM) contains water and its floor is found at an altitude lower than the Bambili Southern Maar (BSM) (50 m) which is swampy and drains into the BNM. Both maars have very steep vertical walls. Three different units are identified in the area. Unit 1 is 1 m thick sequence, characterize by the presence of matrix supported fine-grained fallouts (ash and lapilli size) with stratified diffused bedding planes. This unit is further subdivided into three different layers: L1, L2 and L3 from bottom to top with increasing sizes of particles respectively. This layer shows reverser grading and its grain sizes rarely exceed 2 cm and this unit shows no depositional structures. Unit 2 is an unstratified unit predominantly made up of tephra deposits. Within these deposits are found blocks of sizes ranging between 2 and 10 cm of different petrographic types. They include scoria, basalts, trachyte, and granite cognate. The last unit, Unit 3 is distinctly stratified characterized by well sorted, heterolithologic, graded bedding layers which are matrix supported. Base on the composition and grain sizes, this unit was subdivided into 7 horizons: h1 - h7. Within this unit, two sequences of deposits are distinguished: U1 and U2. Both sequences are characterized by alternation of lapilli and tuff beds. The clast comprises of juvenile materials, mudstone which are highly vesicular and altered rock fragments. Other products identified within the area are ferolithic volcanic bombs (5 - 20 cm), xenocrystals (2 - 4 cm) within finer deposits. They are elongated and show visible twinned planes. Explosion breccias are equally identified occurring as bolders. Along the inner walls of the maars are also found large basaltic and trachytic blocks which are remnants of pre-maar unit within maar

关键词： Maar Bambili Dynamisms Model

A virtual thermometer for ultrahigh-temperature-pressure experiments in a large-volume press

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Matter and Radiation at Extremes 2024年第4期9卷 98-110页

作者： Bingtao Feng Longjian Xie Xuyuan Hou Shucheng Liu Luyao Chen Xinyu Zhao chenyi Li Qiang Zhou Kuo Hu Zhaodong Liu Bingbing Liu State Key Laboratory of Superhard Materials Synergetic Extreme Condition User FacilityCollege of PhysicsJilin UniversityChangchun 130012China Department of Earth Sciences University College LondonLondon WC1E 6BSUnited Kingdom Earth and Planetary Laboratory Carnegie Institute for ScienceWashingtonDistrict of Columbia 20015USA College of Earth Sciences Jilin UniversityChangchun 130012China

Ultrahigh-temperature-pressure experiments are crucial for understanding the physical and chemical properties of *** recent development of boron-doped diamond(BDD)heaters has made such melting experiments possible in large-volume ***,estimates of temperatures above 2600 K and of the temperature distributions inside BDD heaters are not well constrained,owing to the lack of a suitable ***,we establish a three-dimensional finite element model as a virtual thermometer to estimate the temperature and temperature field above 2600 *** advantage of this virtual thermometer over those proposed in previous studies is that it considers both alternating and direct current heating modes,the actual sizes of cell assemblies after compression,the effects of the electrode,thermocouple and anvil,and the heat dissipation by the pressure-transmitting *** virtual thermometer reproduces the power-temperature relationships of ultrahigh-temperature-pressure experiments below 2600 K at press loads of 2.8-7.9 MN(~19 to 28 GPa)within experimental *** temperatures above 2600 K predicted by our virtual thermometer are within the uncertainty of those extrapolated from power-temperature relationships below 2600 ***,our model shows that the temperature distribution inside a BDD heater(19-26 K/mm along the radial direction and<83 K/mm along the longitudinal direction)is more homogeneous than those inside conventional heaters such as graphite or LaCrO_(3) heaters(100-200 K/mm).Our study thus provides a reliable virtual thermometer for ultrahigh-temperature experiments using BDD heaters in Earth and material sciences.

关键词： virtual ultrahigh sizes

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Extreme Sports

ChinAfrica 2024年第8期16卷 58-59页

作者： KANG chenyi ATHIEI AJUONG 不详

The Double Take column looks at a single topic from an African and Chinese *** month we discuss whether it is worthwhile to engage in extreme sports.

关键词： extreme Extreme sports

Olfm4^(+)小肠干细胞清除小鼠模型的构建及其效果评估

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复旦学报（自然科学版） 2024年第2期63卷 268-275页

作者：施晨怡赵冰复旦大学生命科学学院遗传工程国家重点实验室上海200433

小肠是人体中负责消化吸收的主要器官,其具有强大的自我更新能力,主要得益于小肠隐窝基底部的小肠干细胞,平均3~7天就会完全更新一次。LGR5是小肠干细胞最典型的标志物,而嗅素4(Olfactomedin 4,Olfm4)是新的小肠干细胞标志物,在出生后... 详细信息

小肠是人体中负责消化吸收的主要器官,其具有强大的自我更新能力,主要得益于小肠隐窝基底部的小肠干细胞,平均3~7天就会完全更新一次。LGR5是小肠干细胞最典型的标志物,而嗅素4(Olfactomedin 4,Olfm4)是新的小肠干细胞标志物,在出生后阶段其与LGR5的表达会有差异。成体中,当LGR5^(+)小肠干细胞受到损伤时,^(+)4储备干细胞、肠分泌细胞等可以转变为LGR5^(+)小肠干细胞来补充LGR5^(+)小肠干细胞的损失。为了探究在出生后发育阶段LGR5^(+)小肠干细胞并未成熟时,是否会有某种细胞类群补充小肠干细胞对功能,借助转基因小鼠,在出生后9天开始杀死Olfm4^(+)小肠干细胞,并通过HE染色、QPCR和免疫组化等方法鉴定小肠功能。结果显示,在出生后阶段杀伤Olfm4^(+)小肠干细胞,并不会影响小肠结构和小鼠的存活,并猜测可能是Sox9阳性的小肠祖细胞补偿了Olfm4^(+)小肠干细胞的功能。

关键词：小肠干细胞出生后发育 Olfm4 Sox9

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科学教育中的“跨学科”与跨学科概念

物理教学 2024年第2期46卷 2-4页

作者：汤晨毅华东师范大学第二附属中学上海201203

随着《义务教育课程方案(2022年版)》以及各学科课程标准的发布,加强学科关联和综合性、实践性成为课程改革的重要趋势。“跨学科”中包括了综合性内涵和关联性内涵,其综合性内涵能体现学习的完整性,其关联性内涵--跨学科概念可以从知... 详细信息

随着《义务教育课程方案(2022年版)》以及各学科课程标准的发布,加强学科关联和综合性、实践性成为课程改革的重要趋势。“跨学科”中包括了综合性内涵和关联性内涵,其综合性内涵能体现学习的完整性,其关联性内涵--跨学科概念可以从知识本质、思维范式中去寻找。跨学科概念作为一系列大概念,在学生的学习过程中能够发挥框架性、基础性、高效性的作用。在课堂教学中,教师可以在教材基础上引导学生对问题进行跨学科的综合性思考,并点明和拓展其中的跨学科概念。

关键词：跨学科概念跨学科实践

UAV SfM技术在活动构造研究中的应用——以青藏高原西北部龙木错断裂为例

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地质力学学报 2024年第2期30卷 332-347页

作者：江晨轶潘家伟张丽军李海兵孙知明 marie-Luce Chevalier 刘富财苏强中国地质科学院地质研究所北京100037 自然资源部大陆动力学重点实验室北京100037 江苏东海大陆深孔地壳活动国家野外科学观测研究站江苏连云港222300 自然资源部深地科学与探测技术实验室北京100094 河北水利电力学院水利工程系河北沧州061001 中国地质科学院地质力学研究所北京100081

为探讨搭载与未搭载实时动态差分技术/动态后处理技术(RTK/PPK)模块的无人机平台通过运动恢复结构(SfM)方法处理获得的数字高程模型(DEM)数据质量差异,以及建立不同无人机平台野外数据采集和室内数据处理过程的快速流程,利用大疆经纬M 3... 详细信息

为探讨搭载与未搭载实时动态差分技术/动态后处理技术(RTK/PPK)模块的无人机平台通过运动恢复结构(SfM)方法处理获得的数字高程模型(DEM)数据质量差异,以及建立不同无人机平台野外数据采集和室内数据处理过程的快速流程,利用大疆经纬M 300 RTK无人机(搭载禅思L1激光雷达(LiDAR)和测绘相机)与大疆精灵4 Pro无人机(搭载可见光相机)分别对青藏高原西北部龙木错断裂上1处位错阶地进行了数据采集,获得了该处高分辨率、高精度DEM数据和数字正射影像图(DOM)数据。对比结果显示,M 300 RTK无人机平台L1负载系统获得的LiDAR和SfM地形数据精度接近,两者在约100 m的飞行高度获得的DEM数据在水平和垂直方向的均方差分别为0.135 m、0.111 m和0.201 m、0.180 m;无RTK模块的精灵4 Pro无人机获取的DEM数据虽然绝对精度较差(水平和垂直方向均方差分别为1.707 m和249.280 m),但其反映的相对地形与实际地形接近,经过地面控制点校正后精度可以达到分米级。研究表明,RTK SfM技术克服了使用地面控制点的局限性,为活动构造研究领域微地貌测量提供了更高精度、更高效率的解决方案。当对测区的绝对三维坐标要求不高,仅需相对的地形起伏时,未搭载RTK模块的无人机也能够在无地面控制点约束的情况下满足地貌位错测量基本需求。

关键词：无人机运动恢复结构摄影测量活动构造精度评估龙木错断裂

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服装品牌策展人角色建构

服装学报 2024年第1期9卷 81-86页

作者：任力叶晨怡浙江理工大学国际教育学院浙江杭州310018 浙江理工大学服装学院浙江杭州310018

在饱和的服装消费市场现状下,为了满足差异化、多样化和复杂化的时装消费需求,基于服装品牌自身定位,以实现可持续商业落地为目标,采用文献研究法、比较分析法、个案研究法,梳理分析服装品牌策展人角色建构策略。分析得出,策展过程中存... 详细信息

在饱和的服装消费市场现状下,为了满足差异化、多样化和复杂化的时装消费需求,基于服装品牌自身定位,以实现可持续商业落地为目标,采用文献研究法、比较分析法、个案研究法,梳理分析服装品牌策展人角色建构策略。分析得出,策展过程中存在品牌概念、编辑策划、整合展示、关联推动4个要素的联动规律。同时结合案例提出不同定位的策展设计,为服装品牌拓宽文化中介路径提供可能性。

关键词：服装品牌策展人文化体验社群角色建构