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Relay camera videometrics based conversion method for unstable platform to static reference

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Science China(Technological Sciences) 2011年第4期54卷 1017-1023页

作者： YU QiFeng SUN XiangYi jiang GuangWen LIU XiaoLin ZHANG XiaoHu zhou Jian SHANG Yang College of Aerospace and Materials Engineering National University of Defense TechnologyChangsha 410073China 2 College of Optoelectronic Science and Engineering National University of Defense TechnologyChangsha 410073China College of Mechatronic Engineering and Automation National University of Defense TechnologyChangsha 410073China Hunan Key Laboratory for Image Measurement and Vision Navigation Changsha 410073China

This article proposes a relay camera videometrics based method to convert an unstable measuring platform to a static reference to solve the problems of large error or invalidation caused by measuring platform instability in photogrammetric and videometric *** method installs a relay camera on the unstable platform and captures images of a reference marker fixed on a static reference or vice versa to resolve the 3D movement of the unstable platform relative to the static reference,based on which it corrects the error of the measured results and thus eliminating the influence of the platform *** finds new and important applications for videometrics by making high-precision dynamic measurement possible on unstable *** experiments and numerical simulations have proven its validity and practicability.

关键词： optical measurement videometrics unstable platform static reference conversion

基于PACS系统的CBL教学法在超声医学科住院医师规范化培训中的初步应用

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中国高等医学教育 2024年第3期 98-99,102页

作者：周林玉朱晓丹王菁蒋天安浙江大学医学院附属第一医院浙江杭州310003

目的:在初步构建的基于图像存储和传输系统(PACS)的临床超声病例库的基础上,探讨应用案例教学法(CBL)在超声医学住院医师规范化培训教学中的应用价值。方法:将2020年于我院进行超声医学科住院医师规范化培训的40名学员分为对照组和试验... 详细信息

目的:在初步构建的基于图像存储和传输系统(PACS)的临床超声病例库的基础上,探讨应用案例教学法(CBL)在超声医学住院医师规范化培训教学中的应用价值。方法:将2020年于我院进行超声医学科住院医师规范化培训的40名学员分为对照组和试验组,分别应用传统的带教方法和基于PACS系统的CBL教学法进行教学。通过超声理论知识考核、临床思维与决策考核及问卷调查的形式,评价试验组和对照组学员的教学效果和带教老师的教学满意度。结果:试验组在超声理论知识成绩、超声临床思维与决策能力考试的成绩均显著高于对照组(P<0.05),试验组在超声理论学习和学员之间交流和自我语言表达能力等方面的评分均显著高于对照组(P<0.05)。结论:基于PACS系统的CBL教学法不仅可以有效提高学员的临床思维决策能力、语言表达能力,还可以提高老师的带教水平及学员的满意度。

关键词：超声医学住院医师规范化培训图像存储和传输系统案例教学法

Evidence of Evolution in the Dense Cores in Massive Star Forming Regions

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Chinese Journal of Astronomy and Astrophysics 2005年第4期5卷 363-370页

作者： Jian-Jun zhou Jarken Esimbek Ji-Xian Sun Bing-Gang Ju Jing-jiang Sun National Astronomical Observatories/Urumqi observatory Chinese Academy of SciencesUrumqi 830011 Graduate School of the Chinese Academy of Science Beijing 100080 Qinghai Station of Purple mountain Observatory Chinese Academy of Science DelinghaQinghai 817000

The excitation of H2O masers usually needs very high density gas,hence it can serve as a marker of dense gas in HⅡ region. We selected a sample of H2O maser sources from Plume et al. （four with, and four without detected CS（J = 7 - 6） emission）, and observed them in ^13CO（J=1-0） and C^18O （J=1-0）. C^18O （J=1-0） emission was detected only in three of the sources with detected CS（J=7-6） emission. An analysis combined with some data in the literature suggests that these dense cores may be located at different evolutionary stages. Multi-line observation study may provide us clues on the evolution of massive star forming regions and the massive stars themselves.

关键词： ISM: molecules - masers - radio lines: ISM-stars: formation

How the Shishapangma Was Dwarfed 40 Years Ago?

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China's Tibet 2004年第3期15卷 6-13页

作者： zhou zhen

On May 2, 1964, 10 excellent Chinese mountaineers, including Soinam Dorje, Myima Zhaxi,Yundain, Dorje, Cheng Tian-liang, Wang Fu-zhou, Zhang Jun-yan, Chen San, Xu Jing and Wu Zongyue, reached the summit of Shishapangma, the previously unconquered 14th highest peak in the world with an altitude of 8012 meters. Behind this success, there is an unforgettable story.

关键词：登山运动苏联登山队气候条件恐龙化石

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一种智能变电站风险评估模型研究与分析

微型电脑应用 2024年第1期40卷 84-87页

作者：闫佳文周磊蒋春悦陈长金刘哲国网河北省电力有限公司培训中心河北石家庄050031 北京科东电力控制系统有限责任公司北京100192

针对当前智能变电站具备信息物理系统的特点,考虑到传统变电站风险评估缺乏信息系统风险分析,提出一种CPS下的变电站风险评估模型。通过分析变电站可能存在的故障因素,设计基于CPS的变电站风险转移概率模型。根据概率转移模型建立变电... 详细信息

针对当前智能变电站具备信息物理系统的特点,考虑到传统变电站风险评估缺乏信息系统风险分析,提出一种CPS下的变电站风险评估模型。通过分析变电站可能存在的故障因素,设计基于CPS的变电站风险转移概率模型。根据概率转移模型建立变电站风险评估模型,并用改进的缎蓝园丁鸟优化算法(SBO)算法求解评估模型,从而量化变电站风险指数。在实验中,以典型IEEE智能CPS变电站进行仿真,仿真结果验证了所提模型的有效性及实用性。

关键词：智能变电站信息物理系统风险评估缎蓝园丁鸟优化算法

Flexible Dry Hydrogel with Lamella-Like Structure Engineered via Dehydration in Poor Solvent

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CCS Chemistry 2020年第1期2卷 533-543页

作者： Feilong Zhang Jiajia zhou zhen Gu Man Yang Siheng Li Yongyang Song Jun-Bing Fan Jingxin Meng Peiyi Wu Lei jiang Shutao Wang CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science CAS Center for Excellence in NanoscienceTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190(China) University of Chinese Academy of Sciences Beijing 100049(China) Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191(China) State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Laboratory for Advanced MaterialsFudan UniversityShanghai 200433(China)

Hydrogels are among the most promising biologic materials in recent technology with numerous desired applications,including serving as biosensors,drug delivery vehicles,and tissue-engineered products for cell ***,they often dehydrate,and become stiff and brittle in air,causing loss of flexibility and *** layered structures have been proven to increase the strength,toughness,and even flexibility of these materials,which might provide a new clue for the sustenance of the flexibility of drying ***,we report a novel solvent-dehydrated hydrogel engineering approach,aimed to change the inner structure and keep the flexibility of a dehydrated hydrogel in the air via solvent-induced dehydration,for example,acetonedehydrated polyacrylic acid *** flexible dry gel could be folded,twisted,and stretched without any damage due to the assumed lamella-like structures,contrary to dry gels without these microstructures or those with porous structures,which retain brittle *** flexible dry gel also exhibited excellent self-healing capability with the assistance of ***,this flexible gel film displayed strain-visualizing paper writing/erasing performance properties,with water acting as invisible ***,this fabricated flexible hydrogel film might function as confidential information storage *** current approach is versatile,hence applicable to other hydrogels,and provides insight into the engineering of other functional gels for extended future applications.

关键词： dry hydrogel lamella-like structure flexible solvent-induced dehydration strain visualizing

浅析我国婴幼儿配方液态奶政策法规和监管要求

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中国乳业 2024年第9期 61-67页

作者：郑跃耿健强姜洁郭蕊周密史娜北京市食品检验研究院(北京市食品安全监控和风险评估中心) 国家市场监管重点实验室(食品安全重大综合保障关键技术)北京100094

婴幼儿配方液态奶在我国刚兴起,相比婴幼儿配方乳粉尚处在萌芽阶段,婴幼儿配方液态奶市场总体发展基本空白。《中华人民共和国食品安全法(修正草案征求意见稿)》和《婴幼儿配方液态奶生产许可审查细则(征求意见稿)》使婴幼儿配方液态奶... 详细信息

婴幼儿配方液态奶在我国刚兴起,相比婴幼儿配方乳粉尚处在萌芽阶段,婴幼儿配方液态奶市场总体发展基本空白。《中华人民共和国食品安全法(修正草案征求意见稿)》和《婴幼儿配方液态奶生产许可审查细则(征求意见稿)》使婴幼儿配方液态奶迎来新进展,推动婴幼儿配方液态奶开发并逐渐成为高端产品,同时婴幼儿配方液态奶也为国内奶粉领域发展迎来利好。本文梳理了婴幼儿配方液态奶现阶段的监管要求和标准,分析拟加强婴幼儿配方液态奶注册及生产许可监管,为监管部门对婴幼儿配方液态奶开展监督管理提供借鉴。

关键词：婴幼儿配方液态奶注册管理生产许可政策法规标准要求

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内镜经黏膜下隧道肿瘤切除术治疗食管及贲门固有肌层来源大型症状性黏膜下肿瘤的可行性和安全性分析

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中国临床医学 2024年第4期31卷 586-592页

作者：林佳佳王珏姜琦胡皓周平红复旦大学附属中山医院内镜中心上海200032 上海市老年医学中心(复旦大学附属中山医院闵行梅陇院区) 上海201104 复旦大学附属中山医院厦门医院内镜中心厦门361015

目的探讨内镜经黏膜下隧道肿瘤切除术(submucosal tunneling endoscopic resection,STER)治疗食管和贲门固有肌层来源的大型(长径≥3.5 cm)症状性黏膜下肿瘤(submucosal tumor,SMT)的可行性及安全性。方法回顾性分析2017年1月至2020年1... 详细信息

目的探讨内镜经黏膜下隧道肿瘤切除术(submucosal tunneling endoscopic resection,STER)治疗食管和贲门固有肌层来源的大型(长径≥3.5 cm)症状性黏膜下肿瘤(submucosal tumor,SMT)的可行性及安全性。方法回顾性分析2017年1月至2020年1月复旦大学附属中山医院内镜中心收治的接受STER治疗的食管和贲门大型症状性SMT患者的临床特征和随访资料。采用完全切除率、复发率和残留率评估STER的疗效,分析手术相关并发症发生情况以评价STER的安全性。结果共纳入111例SMT患者,其中男性65例、女性46例,平均年龄(43.2±11.6)岁,11例(9.9%)患者有典型症状。切除肿瘤中,平滑肌瘤105例、胃肠道间质瘤2例、神经鞘瘤4例,瘤体中位长径5 cm、中位短径3 cm,中位手术时间70 min,中位住院时间3 d。STER手术成功率100%,肿瘤完全切除率73.9%。术中黏膜破损18例(16.2%);发生术后并发症16例(14.4%),其中严重气胸/胸腔积液(需要引流)10例(9.0%),迟发性出血1例(0.9%),中度以上发热4例(3.6%),隧道内感染1例(0.9%)。随访1~18个月,未发现肿瘤残留、复发,无食管狭窄及憩室等远期并发症。结论STER治疗食管和贲门大型症状性SMT安全有效。

关键词：内镜经黏膜下隧道肿瘤切除术黏膜下肿瘤食管贲门并发症

Optimization of Quenching Process for ZTAP/ High Chromium Cast Iron Composites

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Journal of Wuhan University of Technology(Materials Science) 2022年第6期37卷 1137-1142页

作者： WEI Hongming jiang Yehua ZHANG Xiaozu JIA Yuanwei zhou Mojin XUE Da Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

In order to solve the problem of cracking of ZTAP(Zirconia toughened alumina ceramic particles)reinforced HCCI(high chromium cast iron)matrix composites,the quenching process was *** reinforced HCCI matrix composites were prepared by infiltration method with gravity sand *** thermal expansion curves of HCCI and the composites were measured at different cooling rates by *** microstructure of the HCCI matrix and the composites were characterized by X-ray diffraction,light microscopy,SEM,ESD,and *** tested mechanical properties include Rockwell hardness and impact *** deformation differences of HCCI and the composite at different cooling rates were obtained according to the test results of thermal expansion coefficient curve and changes in microstructure and mechanical properties,and air cooling was the most favorable for the composites to have good hardness and not easy to *** cooling rate during air cooling is approximately equal to 21℃/s in this *** the quenching process was air cooling,the impact toughness and hardness of the composites are 3.7 J/cm^(2) and 61.8 HRC,respectively,and the deformation difference between the composites and HCCI was 20μm at 300℃.

关键词： composites ZTAP quenching cooling rate microstructure thermal expansion