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3rd International Conference on Advances in Materials Manufacturing (ICAMMP 2012)

作者： Qu, Junfeng Xu, Jun Hu, Qiang zhang, fuwen General Research Institute for Nonferrous Metals China Beijing COMPO Advanced Technology Co. Ltd China

ISBN: (纸本)9783037856208

This research investigates the microstructure and growth behavior of the intermetallic compound(IMC) of Sn-1.0Ag-0.5Cu, Sn-1.0Ag-0.5Cu-0.05Ni and Sn-1.0Ag-0.5Cu-0.05N-0.02B/Cu solder joint interface. The interfacial reactions between Cu and the solders at 250 +/- 1 degrees C were examined. Experimental results indicated that the IMCs of the above alloy systems on the soldering interface were Cu6Sn5 and (Cu-x, Ni1-x)(6)Sn-5, respectively. The grain size of primary Sn decreased observably with the micro addition of B and a large number of fine reinforcement particles were found in the solder. With the aging time increasing, the (Cu-x, Ni1-x)(6)Sn-5 micrograph of the Sn-1.0Ag-0.5Cu-0.05N-0.02B solder joint interface was changed from sawtooth-like to shape-layer, but the thickness of IMCs increased unobservably.

关键词： Leader-free solder Interfacial reaction B addition Intermetallic compound Sn-1.0Ag-0.5Cu-NiB

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医学生就业现状和结构分析——以皖南医学院临床医学、麻醉学、医学影像学专业为例

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医学教育研究与实践 2018年第3期26卷 466-469页

作者：霍绍虎付文学夏天祥王笑笑谢天成金玲娟张越陶香林皖南医学院安徽芜湖241002

目的分析皖南医学院医学生就业情况,提出意见和建议帮助改善医学生就业困境。方法对2015~2017届临床医学、麻醉学和医学影像学专业本科毕业生就业数据进行统计,分析其就业现状和结构。结果皖南医学院医学生就业情况呈现以下特点:就业率... 详细信息

目的分析皖南医学院医学生就业情况,提出意见和建议帮助改善医学生就业困境。方法对2015~2017届临床医学、麻醉学和医学影像学专业本科毕业生就业数据进行统计,分析其就业现状和结构。结果皖南医学院医学生就业情况呈现以下特点:就业率维持在98%以上;就业层次呈现下降趋势,前往公立三级医院工作的毕业生比例降低;就业地域集中在省内;升学率逐年升高。结论医学院校需要通过扩大学校知名度、促进实习就业一体化、加强考研指导、重视校园就业市场等方式提升医学生就业质量。

关键词：医学生就业现状就业结构思考

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基于WiFi的无线存储测试系统设计

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传感技术学报 2016年第5期29卷 758-763页

作者：轩春青轩志伟赖富文张国栋郑州成功财经学院信息工程系河南巩义451200 中北大学电子测试技术国防重点实验室太原030051 武汉高德红外股份有限公司武汉430070 中国白城兵器实验中心吉林白城137001

为了解决传统测试仪器在针对场信号测试时布线麻烦、干扰严重;现有的存储测试系统无法监控各测点状态、数据不能及时回传等问题。提出了一种基于WiFi的无线分布式测试系统,综合运用存储测试和无线通信技术,解决了存储测试中出现的问题... 详细信息

为了解决传统测试仪器在针对场信号测试时布线麻烦、干扰严重;现有的存储测试系统无法监控各测点状态、数据不能及时回传等问题。提出了一种基于WiFi的无线分布式测试系统,综合运用存储测试和无线通信技术,解决了存储测试中出现的问题。系统在FPGA控制下完成数据采集存储和无线传输等功能。增加了断线重连等无线功能,保证数据传输的可靠性,并对天线进行选择。试验结果表明,系统工作稳定、数据传输可靠,能够对各测试节点进行状态监控、参数设置和数据回读等操作,具有良好的应用前景。

关键词：存储测试无线传输状态监控断线重连

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黛力新治疗伴焦虑抑郁情绪的非糜烂性胃食管反流病的临床观察

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中国医师杂志 2015年第3期17卷 369-371页

作者：李柏张福文李树王凤磊贺永强杨静杨新立王爱成北京中医药大学东直门医院东区脾胃病科北京101100 北京市通州区潞河医院北京中医药大学第三附属医院

目的：观察黛力新治疗伴焦虑抑郁的非糜烂性胃食管反流病的效果。方法经内镜及综合医院焦虑抑郁量表自测确定的伴焦虑抑郁的非糜烂性胃食管反流病（ NERD）76例，按随机数字表法分为对照组和黛力新治疗组，观察两组治疗1、4、8周后的临... 详细信息

目的：观察黛力新治疗伴焦虑抑郁的非糜烂性胃食管反流病的效果。方法经内镜及综合医院焦虑抑郁量表自测确定的伴焦虑抑郁的非糜烂性胃食管反流病（ NERD）76例，按随机数字表法分为对照组和黛力新治疗组，观察两组治疗1、4、8周后的临床疗效、症状和焦虑抑郁评分变化。结果黛力新能明显改善1周的总有效率（ P ＜0．01），提高1、4、8周的缓解率（1周：P ＜0．05；4周和8周：P ＜0．01）；改善1、4、8周的反流症状和焦虑抑郁评分（ P ＜0．01）。结论黛力新治疗伴焦虑抑郁的NERD，效果显著，起效快，缓解率高，能改善反流症状和焦虑抑郁。

关键词：氟哌噻吨/治疗应用胃食管反流/并发症/药物疗法焦虑抑郁

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Effects of Ni-B addition on microstructure and properties of Sn-1.0Ag-0.5Cu lead -free solder

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2nd International Conference on Advanced Materials Design and Mechanics (ICAMDM 2013)

作者： Qu, Junfeng Xu, Jun Hu, Qiang zhang, fuwen Beijing COMPO Adv Technol Co Ltd Beijing Peoples R China

ISBN: (纸本)9783037857977

The solder/substrate reactions, for Sn-1.0Ag-0.5Cu, Sn-1.0Ag-0.5Cu-0.05Ni and Sn-1.0Ag-0.5Cu-0.05Ni-0.02B, were evaluated in what concerns the melting temperature, microhardness, morphology of the solder and chemical composition of the interface layer. The phases formed at the interface between the Cu Substrate and a molten lead-free solder were studied with different stage times. The evaluation of their chemical compositions were performed by Scanning Electron Microscopy(SEM) and Energy Dispersive Spectrometer(EDS).

关键词： Lead-free solder Interfacial reaction B addition Intermetallic compound

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Giant Pandas Are Not an Evolutionary cul-de-sac: Evidence from Multidisciplinary Research

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MOLECULAR BIOLOGY AND EVOLUTION 2015年第1期32卷 4-12页

作者： Wei, fuwen Hu, Yibo Yan, Li Nie, Yonggang Wu, Qi zhang, Zejun Chinese Acad Sci Inst Zool Key Lab Anim Ecol & Conservat Biol Beijing Peoples R China

The giant panda (Ailuropoda melanoleuca) is one of the world's most endangered mammals and remains threatened by environmental and anthropogenic pressure. It is commonly argued that giant pandas are an evolutionary cul-de-sac because of their specialized bamboo diet, phylogenetic changes in body size, small population, low genetic diversity, and low reproductive rate. This notion is incorrect, arose from a poor understanding or appreciation of giant panda biology, and is in need of correction. In this review, we summarize research across morphology, ecology, and genetics to dispel the idea, once and for all, that giant pandas are evolutionary dead-end. The latest and most advanced research shows that giant pandas are successful animals highly adapted to a specialized bamboo diet via morphological, ecological, and genetic adaptations and coadaptation of gut microbiota. We also debunk misconceptions around population size, population growth rate, and genetic variation. During their evolutionary history spanning 8 My, giant pandas have survived diet specialization, massive bamboo flowering and die off, and rapid climate oscillations. Now, they are suffering from enormous human interference. Fortunately, continued conservation effort is greatly reducing impacts from anthropogenic interference and allowing giant panda populations and habitat to recover. Previous ideas of a giant panda evolutionary cul-de-sac resulted from an unsystematic and unsophisticated understanding of their biology and it is time to shed this baggage and focus on the survival and maintenance of this high-profile species.

关键词： adaptation diet specialization evolutionary dead-end genetics giant panda

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Obligate herbivory in an ancestrally carnivorous lineage: the giant panda and bamboo from the perspective of nutritional geometry

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FUNCTIONAL ECOLOGY 2015年第1期29卷 26-34页

作者： Nie, Yonggang zhang, Zejun Raubenheimer, David Elser, James J. Wei, Wei Wei, fuwen Chinese Acad Sci Inst Zool Key Lab Anim Ecol & Conservat Biol Beijing 100101 Peoples R China Univ Sydney Charles Perkins Ctr Sydney NSW 2006 Australia Univ Sydney Fac Vet Sci Sydney NSW 2006 Australia Univ Sydney Sch Biol Sci Sydney NSW 2006 Australia Arizona State Univ Sch Life Sci Tempe AZ 85287 USA

1. Herbivores face various nutritional challenges in their life cycles, challenges that may become increasingly acute under ongoing environmental changes. Here, focusing on calcium, phosphorus and nitrogen, we used nutritional geometry to analyse individual-based data on foraging and extraction efficiencies, and combined these with data on reproduction and migratory behaviour to understand how a large herbivorous carnivore can complete its life cycle on a narrow and seemingly low quality bamboo diet. Behavioural results showed that pandas during the year switched between four main food categories involving the leaves and shoots of two bamboo species available. Nutritional analysis suggests that these diet shifts are related to the concentrations and balances of calcium, phosphorus and nitrogen. Notably, successive shifts in range use and food type corresponded with a transition to higher concentrations and/or a more balanced intake of these multiple key constituents. Our study suggests that pandas obligatorily synchronize their seasonal migration and reproduction with the disjunct nutritional phenologies of two bamboo species. This finding has potentially important implications for habitat conservation for this species and, more generally, draws attention to the need for understanding the nutritional basis of food selection in devising management plans for endangered species.

关键词： feeding strategy giant panda life cycle nutritional geometry reproductive timing right-angled mixture triangles seasonal migration

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内嵌CFRP筋与木材的粘结锚固性能试验研究

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结构工程师 2014年第5期30卷 146-153页

作者：张富文许清风李向民陈建飞贡春成上海市工程结构新技术重点实验室上海200032 上海市建筑科学研究院(集团)有限公司上海200032 贝尔法斯特女王大学

为研究内嵌CFRP筋与木材的粘结性能,本文共制作了8个试件,试验参数包括木材种类(旧花旗松和新花旗松)和粘结长度(80 mm、120 mm和160 mm)。试验获取了木材与CFRP筋粘结破坏的两种典型模式:CFRP筋与胶层粘结失效破坏、沿粘结面的周边木... 详细信息

为研究内嵌CFRP筋与木材的粘结性能,本文共制作了8个试件,试验参数包括木材种类(旧花旗松和新花旗松)和粘结长度(80 mm、120 mm和160 mm)。试验获取了木材与CFRP筋粘结破坏的两种典型模式:CFRP筋与胶层粘结失效破坏、沿粘结面的周边木材失效破坏。胶层与CFRP筋的粘结滑移过程可分为微滑移段、滑移段、下降段和残余段。在试验基础上对改进BPE模型粘结滑移曲线进行了拟合,拟合曲线与试验曲线吻合较好,说明改进的BPE模型能较好地描述木槽中胶层与CFRP筋的局部粘结滑移曲线,具体的参数取值还需后续试验进行补充深化研究。

关键词：木材粘结锚固性能 CFRP筋内嵌滑移粘结长度

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Progress in the ecology and conservation of giant pandas

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CONSERVATION BIOLOGY 2015年第6期29卷 1497-1507页

作者： Wei, fuwen Swaisgood, Ronald Hu, Yibo Nie, Yonggang Yan, Li zhang, Zejun Qi, Dunwu Zhu, Lifeng Chinese Acad Sci Inst Zool Key Lab Anim Ecol & Conservat Biol Beijing 100101 Peoples R China San Diego Zoo Inst Conservat Res Appl Anim Ecol Escondido CA 92027 USA

Giant panda (Ailuropoda melanoleuca) conservation is a possible success story in the making. If extinction of this iconic endangered species can be avoided, the species will become a showcase program for the Chinese government and its collaborators. We reviewed the major advancements in ecological science for the giant panda, examining how these advancements have contributed to panda conservation. Pandas' morphological and behavioral adaptations to a diet of bamboo, which bear strong influence on movement ecology, have been well studied, providing knowledge to guide management actions ranging from reserve design to climate change mitigation. Foraging ecology has also provided essential information used in the creation of landscape models of panda habitat. Because habitat loss and fragmentation are major drivers of the panda population decline, efforts have been made to help identify core habitat areas, establish where habitat corridors are needed, and prioritize areas for protection and restoration. Thus, habitat models have provided guidance for the Chinese governments' creation of 67 protected areas. Behavioral research has revealed a complex and efficient communication system and documented the need for protection of habitat that serves as a communication platform for bringing the sexes together for mating. Further research shows that den sites in old-growth forests may be a limiting resource, indicating potential value in providing alternative den sites for rearing offspring. Advancements in molecular ecology have been revolutionary and have been applied to population census, determining population structure and genetic diversity, evaluating connectivity following habitat fragmentation, and understanding dispersal patterns. These advancements form a foundation for increasing the application of adaptive management approaches to move panda conservation forward more rapidly. Although the Chinese government has made great progress in setting aside protected areas, f

关键词： adaptive management behavioral ecology climate change foraging ecology landscape ecology molecular ecology

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Human impact and climate cooling caused range contraction of large mammals in China over the past two millennia

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ECOGRAPHY 2015年第1期38卷 74-82页

作者： Li, Xinhai Jiang, Guangshun Tian, Huidong Xu, Lei Yan, Chuan Wang, Zuwang Wei, fuwen zhang, Zhibin Chinese Acad Sci Inst Zool Key Lab Zool Systemat & Evolut Beijing 100101 Peoples R China Northeast Forestry Univ Coll Wildlife Resources Harbin 150040 Peoples R China Chinese Acad Sci Inst Zool State Key Lab Integrated Management Pest Insects Beijing 100101 Peoples R China

Many species have experienced dramatic declines over the past millennia due to the accelerated impact of human activity and climate change, but compelling evidence over such long-term time scales is rare. China has a unique system archiving historical records of important social, meteorological, agricultural and biological events over the last three millennia. We derived historical species occurrences (0-2000 AD) based on a comprehensive review of literature. To detect the driving forces of range contraction, we used correlation and multiple regression to quantify the linear association between species range indices and climate variables (five temperature series and three precipitation series), as well as a human population size series. We also used a machine learning technique, random forest, to quantify the nonlinear effects of the climate variables and human population size. The southward retreat of the Asian elephant Elephas maximus and the rhinoceroses (Dicerorhinus sumatrensis, Rhinoceros unicornis, R. sondaicus) was closely associated with climate cooling and intensified human impact (represented by high population size), and the westward retreat of the giant panda Ailuropoda melanoleuca was associated with intensified human impact. One temperature series and human population size showed interactive effect on range shift of the Asian elephant and the rhinoceroses;the effect of temperature was positive at low population size, but negative at high population size. Our results imply that a higher temperature caused the northward or eastward range shift of the Asian elephant, the rhinoceroses and the giant panda, and currently this trend is impeded by human activities. We also illustrate how human activity and climate act synergistically to cause range contraction.

关键词： CLIMATIC changes -- Physiological effect RESEARCH SPECIES distribution ANIMAL dispersal HOME range (Animal geography) RHINOCEROSES ASIATIC elephant

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