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Paleogene mammalian fauna exchanges and the paleogeographic pattern in Asia

Science China Earth Sciences 2020年第2期63卷 202-211页

作者： Xijun ni Qiang li Chi ZHANG Khizar SAMIULLAH limin ZHANG Yangheshan YANG Wenxin CAO Key Laboratory of Vertebrate Evolution and Human Origins Chinese Academy of SciencesBeijing 100044China CAS Center for Excellence in life and Paleoenvironment Beijing 100044China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100104China University of Chinese Academy of Sciences Beijing 101408China Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of SciencesBeijing 100044China Government College University Faisalabad Faisalabad 38000Pakistan

Mammals are the most important elements in Cenozoic terrestrial ecosystem. The composition and the character of a mammalian fauna are controlled by evolution time and evolutionary rate. Here we took 50 Asian Paleogene mammalian faunas as representatives and applied Bayesian Tip-dating method to infer the relationships and divergence times among these *** on the results of Bayesian Tip-dating analyses, we discussed the correlation between the paleogeographic changes and the mammalian fauna turn-overs. Compared with the traditional fauna correlation and sorting, Bayesian Tip-dating analyses revealed more detailed similarities reflected via the divergence times among the 50 faunas. We discovered that the early Eocene mammalian fauna, which firstly appeared in India subcontinent, is similar to the faunas of the same age in other parts of Asia. It is likely that a passage for the mammalian dispersal was formed before early Eocene. Bayesian inferring suggests that the first appearance of the dispersal passage is during 64.8–61.3 Ma. This time window is close to the time estimation for the initial time of India-Asia collision. During 57.1–47.2 Ma, India subcontinent probably had a habitat different from the main part of Asia, as it was reflected from the composition of the mammalian faunas. It is probably correlated with the uplifted Gangdese Mountain and shallow seas and lowlands on both sides of the collision region. The very remote divergence time(64.8 Ma) estimated by Bayesian inferring reflects the mammalian fauna turnover during the Eocene-Oligocene transition, obviously affected by the global cooling. Till the end of Oligocene, the Arabic Peninsula and Asian mainland remained separated and the mammalian faunas did not show clear connection.

关键词： Paleogene Mammalian fauna Tibetan Plateau India subcontinent

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Microstructure and mechanical properties of 600 MPa grade ultra-high strength aluminum alloy fabricated by wire-arc additive manufacturing

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Journal of Materials Science & Technology 2023年第18期149卷 56-66页

作者： Xinpeng Guo Huijun li Peng Xue Zengxi Pan Rongzheng Xu Dingrui ni Zongyi Ma School of Mechanical Materialsand Mechatronics and Biomedical EngineeringUniversity of WollongongWollongongNSW 2522Australia Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Materials Science and Engineering Shenyang Aerospace UniversityShenyang 110136China

The utilization of wire-arc additive manufacturing(WAAM)technology for the preparation of Al-Zn-Mg-Cu aluminum alloy has made some progress in recent ***,the challenge still remains to achieve ultra-high strength(600 MPa)in *** this study,the crack-free Al-Zn-Mg-Cu-Sc thin-wall component with ultra-high strength was successfully fabricated by the cold metal transfer(CMT)pro-cess using a self-prepared 7B55-Sc filler *** microstructures of both as-deposited and T6 heat-treated samples were all composed of fine equiaxed grains with an average size of about 6.0μ*** primary Al_(3)(Sc,Zr)particles acted as heterogeneous nuclei to promote the formation of equiaxed grains and refine the microstructures during the solidification process.A large amount of continuous eutectic structures rich in Al,Zn,Mg,and Cu elements formed along the grain boundaries under the as-deposited condition,and the precipitated second phases within the grains mainly included the equilibriumηphase,metastableηphase and large-sized T *** T6 heat treatment,the majority of the second phases originally distributed within grains and along grain boundaries were dissolved into the Al matrix,and a large amount of fine GP zones,ηphase and secondary Al_(3)(Sc,Zr)particles were precipitated within the grains during the aging *** tensile strength reached a recorded level of 618 MPa in the hori-zontal direction after T6 heat treatment,which was considered a breakthrough for the manufacturing of 600 MPa grade aluminum alloy by WAAM.

关键词： Wire-arc additive manufacturing Al-Zn-Mg-Cu alloy T6 heat treatment Microstructure Second phase Mechanical property

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Influence of lactic acid bacteria, cellulase, cellulase-producing Bacillus pumilus and their combinations on alfalfa silage quality

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Journal of Integrative Agriculture 2018年第12期17卷 2768-2782页

作者： li Dong-xia ni Kui-kui ZHANG Ying-chao liN Yan-li YANG Fu-yu College of Animal Science and Technology China Agricultural UniversityBeijing 100193P.R.China Beijing Sure Academy of Biosciences Beijing 100085P.R.China

This study assessed the effects of lactic acid bacteria(LAB), cellulase, cellulase-producing Bacillus pumilus and their combinations on the fermentation characteristics, chemical composition, bacterial community and in vitro digestibility of alfalfa silage. A completely randomized design involving a 8(silage additives)×3 or 2(silage days) factorial arrangement of treatments was adopted in the present study. The 8 silage additive treatments were: untreated alfalfa(control); two commercial additives(GFJ and Chikuso-1); an originally selected LAB(Lactobacillus plantarum a214) isolated from alfalfa silage; a cellulase-producing Bacillus(CB) isolated from fresh alfalfa; cellulase(C); and the combined additives(a214+C and a214+CB). Silage fermentation characteristics, chemical composition and microorganism populations were analysed after 30, 60 and 65 days(60 days followed by exposure to air for five additional days). In vitro digestibility was analysed for 30 and 60 days. Compared with the other treatments, selected LAB a214, a214 combined with either C or CB, and Chikuso-1 had the decreased(Pling process, and there were no differences(P>0.05) among them. Fiber degradation was not significant(P≥0.054) in any C or CB treatments. The a214 treatment showed the highest(P=0.009) in vitro digestibility of dry matter(595.0 g kg–1DM) after ensiling and the highest abundance of Lactobacillus(69.42 and 79.81%, respectively) on days 60 and 65, compared to all of other treatments. Overall, the silage quality of alfalfa was improved with the addition of a214, which indicates its potential as an alfalfa silage inoculant.

关键词： alfalfa silage cellulase fermentation quality invitro digestibility lactic acid bacteria

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Photosynthetic characteristics and nitrogen distribution of large-spike wheat in Northwest China

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Journal of Integrative Agriculture 2016年第3期15卷 545-552页

作者： WANG li-fang CHEN Juan SHANGGUAN Zhou-ping State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University

The leaf photosynthesis and nitrogen（N） translocation in three large-spike lines and control cultivar（Xi＇nong 979） of winter wheat（Triticum aestivum L.） were studied in 2010–2011 and 2011–2012. The objectives of this study were to investigate the differences in the physiological characteristics of large-spike lines and control cultivar and identify the limiting factors that play a role in improving the yield of breeding materials. The average yield, grain number per spike, kernel weight per spike, and 1 000-kernel weight of the large-spike lines were 16.0, 26.8, 42.6, and 15.4%, respectively, significantly higher than those of control. The average photosynthetic rates（Pn） were not significant between the large-spike lines and control cultivar during the active growth period. The average PSII maximum energy conversion efficiency（Fv/Fm）, PSII actual quantum efficiency（Ф（PSII））, photochemical quenching coefficient（qP）, PSII reaction center activity（Fv′/Fm′） and water-use efficiency（WUE） of the large-spike lines were 1.0, 5.1, 3.6, 0.8, and 43.4%, respectively, higher than those of the control during the active growth stages. The N distribution proportions in different tissues were ranked in the order of grains〉culms＋sheathes〉rachis＋glumes〉flag leaves〉penultimate leaves〉remain leaves. This study suggested that utilization of the large-spike wheat might be a promising approach to obtain higher grain yield in Northwest China.

关键词： wheat nitrogen distribution large-spike lines photosynthetic characteristics yield

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Flame-retardant Coating by Alternate Assembly of Poly(vinylphosphonic acid) and Polyethylenimine for Ramie Fabrics

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Chinese Journal of Polymer Science 2014年第3期32卷 305-314页

作者： li-li Wang Tao Zhang Hong-qiang Yan 彭懋 Zheng-ping fang Yan li Wang Hao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Institute of Polymer CompositesZhejiang University Laboratory of Polymer Materials and Engineering Ningbo Institute of TechnologyZhejiang University School of Aerospace Engineering and Applied Mechanics Tongji University Centre of Excellence in Engineered Fibre Composites University of Southern Queensland

A novel intumescent flame retardant coating, consisting of poly（vinylphosphonic acid）（PVPA） as the acid source and branched polyethylenimine （BPEI） as the blowing agent, was constructed on the surface of ramie fabrics by alternate assembly to remarkably improve the flame retardancy of ramie. The PVPA/BPEI coating on the surface of individual fibers of ramie fabric pyrolyzes to form protective char layer upon heating/burning and improves the flame retardancy of ramie. Thermogravimetric analysis reveals that the PVPA/BPEI-coated ramie fabrics left as much as 25.8 wt% residue at 600 ~C, while the control （uncoated） fabric left less than 1.4 wt% residue. Vertical flame test shows that all PVPA/BPEI-coated fabrics have shorter after-flame time, and the residues well preserved the original weave structure and fiber morphology, whereas, the uncoated fabric left only ashes. Microscale combustion calorimetry shows that the PVPA/BPEI coatings greatly reduce the total heat release by as much as 66% and the heat release capacity by 76%, relative to those of the uncoated fabric.

关键词： Alternative assembly Poly(vinylphosphonic acid) Flame retardant Ramie fabric.

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陶瓷领域人工智能图像处理的研究进展

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陶瓷学报 2024年第4期45卷 670-688页

作者：聂宇查琪乐李成文章义来李超彭永康李娟许艳娜符锐张宽骥倪成林景德镇陶瓷大学江西省陶瓷企业信息化工程技术研究中心江西景德镇333403 广东松发陶瓷股份有限公司江西景德镇333403 景德镇陶瓷大学信息工程学院江西景德镇333403 景德镇陶瓷大学科学技术处江西景德镇333403 景德镇陶瓷大学管理与经济学院广东潮州515600

大数据与人工智能技术持续的深化发展及其在陶瓷领域的广泛应用,推动了产业的创新进程和效率的显著提升。本文综述了近年来陶瓷图像智能处理方面的重要研究进展,涵盖了图像修复、质量检测、图像识别、图像检索等多方面关键技术的应用,... 详细信息

大数据与人工智能技术持续的深化发展及其在陶瓷领域的广泛应用,推动了产业的创新进程和效率的显著提升。本文综述了近年来陶瓷图像智能处理方面的重要研究进展,涵盖了图像修复、质量检测、图像识别、图像检索等多方面关键技术的应用,揭示了人工智能技术如何提升陶瓷设计创新和生产过程的质量。此外,细致分析了智能图像处理技术在优化制造工艺、提高生产效率以及促进陶瓷艺术与文化遗产保护等方面的应用。最后,展望了未来大语言模型如何在陶瓷领域中开拓前沿的创新路径,成为推动行业进步的关键力量。

关键词：陶瓷图像处理机器视觉人工智能陶瓷生产

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Nonthermal Emission of Tycho's Supernova Remnant

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Chinese Physics Letters 2011年第10期28卷 292-295页

作者： TANG Yun-Yong fang Jun ZHANG li Department of Physics Yunnan UniversityKunming 650091

The time-dependent non-thermal particle and photon spectra are reproduced for a Type Ia SNR Tycho with radio,x-ray,GeV and TeV emission within the framework of the diffusive shock acceleration of the non-thermal *** photons can come from the inverse Compton scattering of relativistic electrons and from theπ0−decay process in proton-proton *** results show that(1)the hadronic case can model the observed multiwavelength spectrum well and,peculiarly,theπ0-decay process appears to be necessary to explain the GeV emission;and(2)magnetic field amplification is vital in the SNR.

关键词： interaction particles thermal

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灸法用于癌症治疗的选穴规律分析

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World Journal of Acupuncture-Moxibustion 2024年第1期34卷 54-62页

作者：潘茹芳马舒雅高田宇张飞程李天玉贾春生潘丽佳河北中医学院针灸推拿学院石家庄050200

Objective:To summarize the rules of acupoint selection in treatment of cancer with moxibustion by analyzing the articles of relevant clinical trials in recent years in China,so as to provide the references for acupoint selection of moxibustion for ***:The articles of clinical trials for treatment of cancer with moxibustion were retrieved from China National knowledge Infrastructure(CNKI),VIP Chinese Journal Service Platform(VIP)and Wanfang Data Knowledge Service Platform(Wanfang)from 1st January 2015 to 30th June *** EpiData software,the data were extracted and exported in *** analysis was performed with IBM SPSS Statistics 23 ***:A total of 516 articles were collected,including 533 prescriptions with 164 acupoints *** high-frequency acupoints were similar among 7 types of cancers and these acupoints mostly acted on supporting the antipathogenic qi,replenishing qi and regulating the spleen and *** meridian tropism,the acupoints from the conception vessel,the governor vessel and bladder meridian were dominant in treatment of cancer with *** terms of location distribution,the selected acupoints were generally distributed on the chest,abdomen,lumbar region and the upper back of the *** on cancer related symtomes in different systems,the use frequency of Zusanli(ST36)was the highest for the symptoms of the immune,digestive,circulatory and motor systems;that of Feishu(BL13)was the highest for the respiratory system symptoms and that of Guanyuan(CV4)was the highest for the urinary system *** cluster analysis of high-frequency acupoints showed that the acupoints of moxibustion for cancer generally work on cultivating yang,supporting the antipathogenic qi,strengthening the spleen and harmonizing the stomach,and were selected in association with the clinical symptoms of different cancers.

关键词： Cancer Moxibustion Data mining Rules of acupoint selection

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Improvement of microstructure and fatigue performance of wire-arc additive manufacture d 4043 aluminum alloy assiste d by interlayer friction stir processing

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Journal of Materials Science & Technology 2023年第2期133卷 183-194页

作者： Changshu He Jingxun Wei Ying li Zhiqiang Zhang ni Tian Gaowu Qin liang Zuo School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Key Laboratory for Anisotropy and Texture of Materials Northeastern UniversityShenyang 110819China Research Center for Metallic Wires Northeastern UniversityShenyang 110819China

To expand the application of wire-arc additive manufacturing(WAAM)in aluminum alloy forming com-ponents,it is vitally important to reduce the porosity,refine microstructure,and thereby improve the mechanical properties of the *** this study,the interlayer friction stir processing(FSP)tech-nique was employed to assist the WAAM of 4043 Al-Si alloy,and the related effects on the microstruc-ture evolutions and mechanical properties of the fabricated builds were systematacially *** compared to the conventional WAAM processing of Al-Si alloy,it was found that the introduction of in-terlayer FSP can effectively eliminate the pores,and both theα-Al dendrites and Si-rich eutectic network were severely broken up,leading to a remarkable enhancement in ductility and fatigue *** average yield strength(YS)and ultimate tensile strength(UTS)of the Al-based components produced by the combination of WAAM and interlayer FSP methods were 88 and 148 MPa,***,the elongation(EL)of 37.5%and 28.8%can be achieved in the horizontal and vertical directions,*** anisotropy of EL was attributed to the inhomogeneous microstructure in the stir zone(SZ).Notably,the stress concentration can be effectively reduced by the elimination of porosity and Si-rich eu-tectic network fragmentation by the interlayer FSP,and thus the fatigue behavior was improved with the fatigue strength and elongation increased by∼28%and∼108.7%,*** is anticipated that this study will provide a powerful strategy and theoretical guidance for the WAAM fabrication of Al-based alloy components with high ductility and fatigue performance.

关键词： Wire-arc additive manufacturing(WAAM) Friction stir processing(FSP) Aluminum alloy Microstructure evolution Fatigue performance

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定痛汤联合中药烫熨治疗气滞血瘀型慢性盆腔炎的临床疗效研究

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中外医疗 2024年第22期43卷 182-185,189页

作者：李吉英倪娇芳陈月玲泉州市中医院妇科福建泉州362000

目的探讨定痛汤联合中药烫熨治疗气滞血瘀型慢性盆腔炎的临床效果。方法随机选取2022年1月—2024年1月泉州市中医院收治的100例慢性盆腔炎患者(气滞血瘀型)为研究对象,依据不同治疗方法分为对照组和观察组,各50例。对照组采用定痛汤治疗... 详细信息

目的探讨定痛汤联合中药烫熨治疗气滞血瘀型慢性盆腔炎的临床效果。方法随机选取2022年1月—2024年1月泉州市中医院收治的100例慢性盆腔炎患者(气滞血瘀型)为研究对象,依据不同治疗方法分为对照组和观察组,各50例。对照组采用定痛汤治疗,观察组采用定痛汤联合中药烫熨。比较两组患者体征症状、中医证候积分、血液流变学指标、治疗疗效、不良反应、复发率。结果治疗后,观察组症状体征缓解情况优于对照组,差异有统计学意义(P0.05);治疗后,观察组中医证候评分低于对照组,差异有统计学意义(P0.05)。观察组复发率为4.08%(2/49),低于对照组的21.43%(9/42),差异有统计学意义(P<0.05)。结论定痛汤联合中药烫熨治疗慢性盆腔炎效果理想,可有效缓解患者症状体征,促进血流变指标改善,并且具有较低的复发率。

关键词：慢性盆腔炎定痛汤气滞血瘀型中药烫熨妇科疾病

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