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Vocal repertoire of the critically endangered whiteheaded langur(Trachypithecus leucocephalus): Call types, acoustic structures, and related social-ecological contexts

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Zoological Research 2022年第5期43卷 875-879页

作者： peng-Lai fan Jia-Xing Li Li-Ting Yang Tao Sun Shi-Jun Wu Cyril CGrueter Cheng-Ming Huang Qi-Hai Zhou Ming Li CAS Key Lab Animal Ecology&Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Guangxi Normal University) Ministry of EducationGuilinGuangxi 541006China Guangxi Key Laboratory of Rare and Endangered Animal Ecology College of Life SciencesGuangxi Normal UniversityGuilinGuangxi 541006China Guangxi Chongzuo White-headed Langur National Nature Reserve ChongzuoGuangxi 532200China Department of Anatomy Physiologyand Human BiologySchool of Human SciencesUniversity of Western AustraliaPerth WA 6009Australia Centre for Evolutionary Biology School of Biological SciencesUniversity of Western AustraliaPerth WA 6009Australia International Center of Biodiversity and Primate Conservation Dali UniversityDaliYunnan 671003China Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunmingYunnan 650223China

DEAR EDITOR,We examined the vocal repertoire of the critically endangered white-headed langur(Trachypithecus leucocephalus)inhabiting karst limestone forests in *** identified 17 call types across all age/sex classes based on human auditory perception,spectrogram assessment,and quantitative analysis of 25 acoustic parameters extracted from 409 high-quality *** total,11 types of calls produced by adults corresponded to the simple one-male multi-female social groups of white-headed langurs.

关键词： white critically karst

World’s first spaceflight on-orbit demonstration of a flexible solar array system based on shape memory polymer composites

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Science China(Technological Sciences) 2020年第8期63卷 1436-1451页

作者： LAN Xin LIU LiWu ZHANG FengHua LIU ZhengXian WANG LinLin LI QiFeng peng fan HAO SiDa DAI WenXu WAN Xue TANG Yong WANG Mian HAO YanYan YANG Yang YANG Cheng LIU YanJu LENG JinSong Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150080China Department of Aerospace Science and Mechanics Harbin Institute of TechnologyHarbin 150001China Institute of Telecommunication Satellite China Academy of Space TechnologyBeijing 100094China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China

With a 10%reversible compressive strain in more than 10 deformation cycles,the shape memory polymer composites(SMPCs)could be used for deployable structure and releasing *** this paper,without traditional electro-explosive devices or motors/controllers,the deployable SMPC flexible solar array system(SMPC-FSAS)is studied,developed,ground-based tested,and finally on-orbit *** epoxy-based SMPC is used for the rolling-out variable-stiffness beams as a structural frame as well as an actuator for the flexible blanket solar *** releasing mechanism is primarily made of the cyanate-based SMPC,which has a high locking stiffness to withstand 50 g gravitational acceleration and a large unlocking displacement of 10 *** systematical mechanical and thermal qualification tests of the SMPC-FSAS flight hardware were performed,including sinusoidal sweeping vibration,shocking,acceleration,thermal equilibrium,thermal vacuum cycling,and thermal cycling *** locking function of the SMPC releasing mechanisms was in normal when launching aboard the SJ20 Geostationary Satellite on 27 Dec.,*** SMPC-FSAS flight hardware successfully unlocked and deployed on 5 Jan.,2020 on geostationary *** triggering signal of limit switches returned to ground at the 139 s upon heating,which indicated the successful unlocking function of SMPC releasing mechanisms.A pair of epoxy-based SMPC rolled variable-stiffness tubes,which clapped the flexible blanket solar array,slowly deployed and finally approached an approximate 100%shape recovery ratio within 60 s upon *** study and on-orbit successful validation of the SMPC-FSAS flight hardware could accelerate the related study and associated productions to be used for the next-generation releasing mechanisms as well as space deployable structures,such as new releasing mechanisms with low-shocking,testability and reusability,and ultra-large space deployable solar arrays.

关键词： shape memory polymer composite releasing mechanism shape memory polymer composite tubes flexible solar array

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粘弹性复合材料层合板壳的动力稳定性分析

振动工程学报 2006年第4期19卷 459-464页

作者：彭凡向红傅衣铭湖南大学工程力学系湖南长沙410082

分析面内周期激励下粘弹性层合平板以及轴向周期荷载作用下粘弹性层合圆柱壳的动力稳定性。设粘弹性复合材料服从Boltzmann积分型本构关系,其松弛模量由Prony-Dirichlet级数表示,基于薄板与薄壳理论,分别得到对称正交铺设层合板与层合... 详细信息

分析面内周期激励下粘弹性层合平板以及轴向周期荷载作用下粘弹性层合圆柱壳的动力稳定性。设粘弹性复合材料服从Boltzmann积分型本构关系,其松弛模量由Prony-Dirichlet级数表示,基于薄板与薄壳理论,分别得到对称正交铺设层合板与层合圆柱壳的微分-积分型动力学方程,并应用谐波平衡法直接求解,忽略积分运算所产生的衰减项,导出确定动力不稳定区域边界的特征方程。分析结果表明,主要动力不稳定区域的缩小与材料的粘性参数以及结构横向振动的基频密切相关。

关键词：粘弹性层合板层合圆柱壳动力稳定谐波平衡

同步加速器X射线层析显微技术在化石胚胎Markuelia研究中的应用

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北京大学学报（自然科学版） 2008年第3期44卷 447-451页

作者：彭凡董熙平北京大学地球与空间科学学院地质学系北京100871

运用同步加速器X射线层析显微技术,对化石胚胎Markuelia的内部构造进行了虚拟切片及三维重建,揭示出化石胚胎Markuelia同时存在左型和右型盘绕方式,身体分节数为64-70之间,初步证明了尾刺发育早于吻刺的观点,观察到的消化道比以前所描... 详细信息

运用同步加速器X射线层析显微技术,对化石胚胎Markuelia的内部构造进行了虚拟切片及三维重建,揭示出化石胚胎Markuelia同时存在左型和右型盘绕方式,身体分节数为64-70之间,初步证明了尾刺发育早于吻刺的观点,观察到的消化道比以前所描述的要长,并推断有可能保存有司翻吻运动的肌肉组织或脑部神经结。

关键词：化石胚胎 Markuelia 三维重建分节

看起来像个国家——对美国政治脆弱性的历史文化分析

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文化纵横 2024年第6期 100-111,M0004页

作者：樊鹏中国社科院政治学研究所

对于美国近年来愈演愈烈的社会撕裂,许多人会从经济社会的视角进行解释。然而,美国社会的各自为政、分裂对抗并非出自当代的新现象,而是深植于这个国家的基因之中。在本期“重新认识西方”栏目中,樊鹏的文章试图从历史文化层面为美国极... 详细信息

对于美国近年来愈演愈烈的社会撕裂,许多人会从经济社会的视角进行解释。然而,美国社会的各自为政、分裂对抗并非出自当代的新现象,而是深植于这个国家的基因之中。在本期“重新认识西方”栏目中,樊鹏的文章试图从历史文化层面为美国极端现实主义的政治风格寻找解释,认为其源于美国的流民社会特性。

关键词：美国国际政治流民社会

维普期刊数据库博看期刊评论

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质量时变系统的动载荷识别

湖南大学学报（自然科学版） 2016年第8期43卷 52-56页

作者：彭凡王樑肖健湖南大学机械与运载工程学院湖南长沙410082 北京强度与环境研究所北京100076

研究质量时变系统的动态载荷识别技术,引入广义模态概念,在初瞬时的模态空间中利用模态叠加法得到部分解耦的动力学方程,结合考虑质量变化效应的虚拟变形法和Duhamel积分,构建反演动态力的2种分析途径.一种是基于加速度反演的连锁递推格... 详细信息

研究质量时变系统的动态载荷识别技术,引入广义模态概念,在初瞬时的模态空间中利用模态叠加法得到部分解耦的动力学方程,结合考虑质量变化效应的虚拟变形法和Duhamel积分,构建反演动态力的2种分析途径.一种是基于加速度反演的连锁递推格式,另一种是基于位移和加速度反演的正则化求解格式.分析2个动载荷作用下的变质量多自由度系统,利用Euler中点辛差分方法求得系统的响应,将其叠加随机噪声以模拟测点响应,然后,应用2种模态力反求格式反演动载荷.研究结果表明,连锁递推格式计算效率高,但对加速度测量噪声敏感;正则化求解格式的稳健性较高.

关键词：变质量动态载荷反问题递归计算正则化

Dyeing Machine Monitoring System Based on PLC

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科技视界 2016年第8期 195-195,219页

作者：王惠 fan peng-fei WANG Yan WEI Ping College of Automation Engineering Qingdao University

Contents of this paper is a cold pad batch dyeing equipment PLC control system on the redesign. The transformation of the old machine control systems into the popular split control. There are two aspects, one PLC reconstruction, the second is a touch screen *** terms with a new model, with a Siemens S7-300 series PLC to replace discontinued C7-626 series. Touch screen aspect rewrite configuration interface program. After transformation, cold pad batch dyeing machine monitoring system greatly enhanced reliability, improved system stability and reduce the cost of spare parts, easy to buy, improve the performance of the entire automation and control equipment.

关键词：英语学习学习方法阅读知识阅读材料

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北京大学地质馆建筑考

地质论评 2024年第6期70卷 2449-2458页

作者：彭繁中国科学院大学北京100049 中国科学院自然科学史研究所北京100190

北京大学地质馆是20世纪30年代北大“中兴”时期建成的三大标志性建筑之一,也是其中唯一一座独属于一个学系(北大地质学系)的建筑。地质馆的落成有赖于三方面条件:30年代初,北大购得其“第一院”与“第二院”之间的松公府大片区域,为校... 详细信息

北京大学地质馆是20世纪30年代北大“中兴”时期建成的三大标志性建筑之一,也是其中唯一一座独属于一个学系(北大地质学系)的建筑。地质馆的落成有赖于三方面条件:30年代初,北大购得其“第一院”与“第二院”之间的松公府大片区域,为校园扩建提供了基础;北大与中华教育文化基金董事会商定的合作研究特款办法解决了大部分建筑经费问题;双方合聘的研究教授丁文江和李四光则成为地质馆建设的直接推动者。1935年由梁思成、林徽因设计的地质馆建成,以现代风格为主兼具中国传统特色,为北大地质学系师生提供了良好的教学和科研条件,可视为北大地质学系在20世纪上半叶全盛时期的标志。全面抗战爆发后地质馆落入日伪之手,先后被(伪)“东亚文化协议会”和(伪)“北大理学院”地质学系占用。1946年北大复员,地质学系迁回地质馆,图书、仪器均有增添。1952年全国高校院系调整,地质馆由新组建的北京地质学院使用,北大地质学系的辉煌也暂时告一段落。

关键词：北京大学地质馆松公府中华教育文化基金董事会丁文江李四光

Total neoadjuvant treatment for MRI-stratified high-risk rectal cancer:a single-center,single-arm,prospective Phase II trial(PKUCH-R02)

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Gastroenterology Report 2023年第1期11卷 282-290页

作者： peng-Ju Chen Lin Wang Ting-Ting Sun Yun-Feng Yao Yi-fan peng Jun Zhao Tian-Cheng Zhan Jia–Hua Leng Yong Cai Yong-Heng Li Xiao-Yan Zhang Ying-Shi Sun Zhong-Wu Li Wei-Hu Wang Ai-Wen Wu Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of Gastrointestinal Cancer Unit IIIPeking University Cancer Hospital&InstituteBeijingP.R.China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of Radiation OncologyPeking University Cancer Hospital&InstituteBeijingP.R.China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of RadiologyPeking University Cancer Hospital&InstituteBeijingP.R.China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of PathologyPeking University Cancer Hospital&InstituteBeijingP.R.China

Background:Induction chemotherapy combined with neoadjuvant chemoradiotherapy has been recommended for patients with high-risk,locally advanced rectal ***,the benefit of more intensive total neoadjuvant treatment(TNT)is *** study aimed to assess the safety and efficacy of induction chemotherapy combined with chemoradiotherapy and consolidation chemotherapy for magnetic resonance imaging-stratified high-risk rectal ***:This was a single-center,single-arm,prospective Phase II trial in Peking University Cancer Hospital(Beijing,China).Patients received three cycles of induction oxaliplatin and capecitabine(CapeOX)followed by chemoradiotherapy and two cycles of consolidation *** primary end point was adverse event rate and the second primary end points were 3-year disease-free survival rate,completion of TNT,and pathological downstaging ***:Between August 2017 and August 2018,68 rectal cancer patients with at least one high risk factor(cT3c/3d/T4a/T4b,cN2,mesorectal fascia involvement,or extramural venous invasion involvement)were *** overall compliance of receiving the entire treatment was 88.2%(60/68).All 68 patients received induction chemotherapy,65 received chemoradiotherapy,and 61 received consolidation *** Grade 3–4 adverse event rate was 30.8%(21/68).Nine patients achieved clinical complete response and then watch and *** patients(7.4%)developed distant metastasis during TNT and received palliative *** patients underwent surgical *** complete response rate was 27.9%.After a median follow-up of 49.2 months,the overall 3-year disease-free survival rate was 69.7%.Conclusions:For patients with high-risk rectal cancer,this TNT regimen can achieve favorable survival and complete response rates but with high ***,it is necessary to pay attention to the possibility of distant metastasis during the long treatment period.

关键词： rectal cancer neoadjuvant chemoradiotherapy MRI prognosis pathological complete response