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Mechanical properties of AM Ti6Al4V porous scaffolds with various cell structures

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Rare Metals 2019年第6期38卷 561-570页

作者： Hua-De Zheng Li-Li Liu Chun-Lin Deng Zhi-Feng Shi cheng-Yun ning School of Materials Science and Engineering South China University of TechnologyGuangzhou International CampusGuangzhou 510006China National Engineering Research Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou 510006China Key Laboratory of Biomedical Engineering of Guangdong Province and Innovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou 510006China South China Institute of Collaborative Innovation Dongguan 523808China Medical Devices Research and Testing Center South China University of TechnologyGuangzhou 510006China

Porous scaffolds as succedaneum of natural bone were investigated and applied in medical *** this work, we carried out studies on mechanical properties of solid parts and porous scaffolds obtained by additive manufacturing(AM) *** is found that productions of AM process have a higher yield strength and higher microhardness compared to commercial *** surface was observed for layer-by-layer process of AM and sticking of powder *** machining accuracy is affected by both dimensions and ***, mechanical properties of porous scaffolds are influenced by machining accuracy and *** addition, the unit cell structures also impact the mechanical properties of porous scaffolds in terms of elastic modulus, yield strength and failure ***,considering the mechanical properties and biological properties, scaffolds with cube(CB) crystal cells are the best choice in our study.

关键词： Ti6Al4V Porous scaffolds AM Mechanical property

Enhanced removal of sulfonamide antibiotics from water by phosphogypsum modified biochar composite

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Journal of Environmental Sciences 2023年第8期130卷 174-186页

作者： Zonghong Jiang Miao Chen Xinqing Lee Qianwei Feng ning cheng Xueyang Zhang Shengsen Wang Bing Wang College of Resources and Environmental Engineering Guizhou UniversityGuiyang 50025China Key Laboratory of Karst Georesources and Environment Ministry of EducationGuiyang 550025China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China School of Environmental Engineering Xuzhou University of TechnologyXuzhou 221018China College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225127China

Antibiotic pollution has become a global eco-environmental *** reduce sulfonamide antibiotics in water and improve resource utilization of solid wastes,phosphogypsummodified biochar composite(PMBC)was prepared via facile one-step from distillers grains,wood chips,and *** physicochemical properties of PMBCwere characterized by scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FTIR),Zeta potential,X-ray diffraction(XRD),*** influencing factors,adsorption behaviors,and mechanisms of sulfadiazine(SD)and sulfamethazine(SMT)onto PMBC were studied by batch and fixed bed column adsorption *** results showed that the removal rates of SD and SMT increased with the increase of phosphogypsum proportion,while decreased with the increase of solution *** maximum adsorption capacities of modified distillers grain and wood chips biochars for SD were 2.98 and 4.18 mg/g,and for SMT were 4.40 and 8.91mg/g,respectively,which was 9.0–22.3 times that of pristine *** bed column results demonstrated that PMBC had good adsorption capacities for SD and *** the solution flow rate was 2.0 mL/min and the dosage of PMBC was 5.0 g,the removal rates of SD and SMT by modified wood chips biochar were both higher than 50%in 4 *** main mechanisms of SD and SMT removal by PMBC are hydrogen bonding,π-πdonor-acceptor,electrostatic interaction,and hydrophobic *** study provides an effective method for the removal of antibiotics in water and the resource utilization of phosphogypsum.

关键词： Modified biochar Solid waste Antibiotics Phosphogypsum Fixed-bed adsorption

Molecular and functional characterization of three odorant-binding proteins from the wheat blossom midge,Sitodiplosis mosellana

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Insect Science 2020年第4期27卷 721-734页

作者： Wei-ning cheng Yu-Dong Zhang Wei Liu Guang-Wei Li Keyan Zhu-Salzman Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau Ministry of AgricultureNorthwest A&F UniversityYang lingShaanxiChina Shaanxi Key Laboratory of Chinese Jujube Van'an UniversityVan'anShaanxiChina Department of Entomology Texas A&M UniversityCollege StationTXUSA

Sitodiplosis mosellana,a periodic but devastating wheat pest,relies on wheat spike volatiles as a cue in sclecing hosts for *** odorant-binding proteins(OBPs)are thought to play essential roles in filtering,binding and transporting hydropho-bic odorant molecules to specific *** date,the molecular mechanisms underlying *** olfaction are poorly ***,three *** antenna-specific OBP genes,SmosOBPII,16 and 21,were cloned and bacterially *** properties of the recombinant proteins to 28 volatiles emitted from wheat spikes were in-vestigated using fluorescence competitive binding *** analysis suggested that these SmosOBPs belong to the Classic OBP ***-binding analysis showed that all three SmosOBPs preferentially bound alcohol,ester and ketone com-pounds,and SmosOBP11 and 16 also selectively bound terpenoid *** par-ticular,the three SmosOBPs had high binding affinities(Ki<20μmol/L)to 3-hexanol and cis-3-hexenylacetate that elicited strong electroantennogram(EAG)response fromfemale *** addition,SmosOBP11 displayed significantly higher binding(Ki<8μmo/L)than SmosOBP16 and 21 to l-octen-3-ol,D-panthenol,a-pinene and heptyl acetate which elicited significant EAG response,suggesting that SmosOBP11 plays a ma-jor role in recognition and transportation of these *** findings have provided important insight into the molecular mechanism by which *** specifically rec-ognizes plant volatiles for host selection,and have facilitated identification of effective volatile attractants that are potentially useful for pest monitoring and trapping.

关键词： binding assay electroantennogram response host selection odorant-binding protein Sitodiplosis mosellana wheat spike violates

Different treatments for different mechanisms in vasovagal syncope

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Journal of Geriatric Cardiology 2006年第1期3卷 61-64页

作者： Quan FANG Kangan cheng Hua DENG ning WU Department of Cardiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences Department of Cardiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences Department of Cardiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences Department of Cardiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences

The treatment of vasovagal syncope has been by far unsatisfactory. Beta-blockers may prevent vasovagal syncope, but they exacerbates heart asystole. Cardiac pacing prevents syncope but notpresyncope. The frequent, serious vasovagal syncope attacks of a 63- year-old woman patient were completely prevented by administration of 100 mg metoprolol (b.i.d) for 3 months until the patient experienced a complete heart block. A DDD pacemaker implantation abolished syncope but not the presyncope, which was eventually prevented in a follow-up period of 24 months by adding 75 mg atenalol twice a day. This case suggests a different mechanism involved in vasovagal syncope.

关键词： vasovagal syncope beta-blocker cardiac pacing tilt table test heart block

A Reliable Iteration Algorithm for One-Bit Compressive Sensing on the Unit Sphere

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Acta Mathematicae Applicatae Sinica 2024年第3期40卷 801-822页

作者： Yan-cheng LU ning BI An-hua WAN School of Mathematics Sun Yat-sen UniversityGuangzhou 510275China

The one-bit compressed sensing problem is of fundamental importance in many areas,such as wireless communication,statistics,and so ***,the optimization of one-bit problem coustrained on the unit sphere lacks an algorithm with rigorous mathematical proof of convergence and *** this paper,an iteration algorithm is established based on difference-of-convex algorithm for the one-bit compressed sensing problem constrained on the unit sphere,with iterating formula■,where C is the convex cone generated by the one-bit measurements andη_(1)>η_(2)>1/*** new algorithm is proved to converge as long as the initial point is on the unit sphere and accords with the measurements,and the convergence to the global minimum point of the l_(1)norm is discussed.

关键词： one-bit compressed sensing difference of convex algorithm iteration algorithm ■1-minimization

种公猪精液中CSFV、PCV2和PRRSV多重PCR检测方法的建立及应用

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动物医学进展 2024年第9期45卷 77-80页

作者：杨程李文军张雪峰程宁刘野王凯月邵笑李双玉孙英峰天津农学院动物科学与动物医学学院天津300384 天津农垦康嘉生态养殖有限公司天津300112 天津市蓟州区畜牧水产业发展服务中心天津301900

旨在建立可同时检测猪精液中猪瘟病毒(CSFV)、猪圆环病毒2型(PCV2)和猪繁殖与呼吸综合征病毒(PRRSV)的多重PCR方法。根据GenBank数据库中的CSFV E2基因、PCV2 ORF2基因及PRRSV ORF5基因,设计3对特异性引物,通过优化反应条件和特异性、... 详细信息

旨在建立可同时检测猪精液中猪瘟病毒(CSFV)、猪圆环病毒2型(PCV2)和猪繁殖与呼吸综合征病毒(PRRSV)的多重PCR方法。根据GenBank数据库中的CSFV E2基因、PCV2 ORF2基因及PRRSV ORF5基因,设计3对特异性引物,通过优化反应条件和特异性、敏感性检验,建立可同时检测上述3种病原的多重PCR方法,用该方法对30份精液样品进行检测。结果表明,所建立的方法可同时扩增出734 bp(CSFV)、476 bp(PCV2)、305 bp(PRRSV)的目的条带,且对猪的其他病毒(PRV、PEDV、TEGV)扩增结果呈阴性,多重PCR最低检出限1×10^(7) copies/μL,具有良好的特异性和较高的灵敏度。用单一PCR与多重PCR方法对临床样品进行检测,两种方法的检测结果一致,表明该方法可同时对种公猪精液中CSFV、PCV2和PRRSV的检测。

关键词：种公猪精液猪瘟病毒猪繁殖与呼吸综合征病毒猪圆环病毒2型多重PCR

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情感语音合成综述

大数据 2024年第5期10卷 56-73页

作者：施昊翔张旭龙王健宗程宁肖京平安科技(深圳)有限公司广东深圳518063 中国科学技术大学安徽合肥230026

作为语音领域一个重要的研究方向,语音合成致力于将文本转化为语音。随着深度学习技术的快速发展,语音合成的目的早已不仅仅是合成一段“能听懂”的音频这么简单,情感的加入往往能使语音变得更加具有表现力。基于此,情感语音合成在语音... 详细信息

作为语音领域一个重要的研究方向,语音合成致力于将文本转化为语音。随着深度学习技术的快速发展,语音合成的目的早已不仅仅是合成一段“能听懂”的音频这么简单,情感的加入往往能使语音变得更加具有表现力。基于此,情感语音合成在语音中加入不同的情感并对情感进行调控,以生成灵活且准确的情感语音。从情感语音合成中的几个关键科学问题出发,分别对近几年来基于情感迁移、情感强度控制和情绪混合的发展进行了总结分析,并介绍了情感语音合成的相关数据集和评价指标,最后对情感语音合成进行了展望。

关键词：情感语音合成情感迁移情感强度深度学习

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数字说话人脸生成技术综述

大数据 2024年第5期10卷 74-95页

作者：张冰源张旭龙王健宗程宁肖京平安科技(深圳)有限公司广东深圳518000 中国科学技术大学先进技术研究院安徽合肥230000

在现代计算机视觉和自然语言处理的交叉领域,数字说话人脸生成技术已经成为一个越来越重要的研究主题。数字说话人脸生成技术专注于依据预定的文本或音频序列生成逼真的人脸图像。近年来,深度学习方法,如卷积神经网络、生成对抗性网络... 详细信息

在现代计算机视觉和自然语言处理的交叉领域,数字说话人脸生成技术已经成为一个越来越重要的研究主题。数字说话人脸生成技术专注于依据预定的文本或音频序列生成逼真的人脸图像。近年来,深度学习方法,如卷积神经网络、生成对抗性网络以及神经渲染场在此领域已经表现出了显著的应用价值。这些方法不仅引起了学术界的广泛关注,而且在工业界得以实际应用,用于解决图像处理和计算机视觉方面的具体问题。尽管已经取得了一定的进展,实际应用这些方法仍然面临诸多挑战。综合分析和评估深度学习方法在数字说话人脸生成方面的具体实现,以识别现存方法的优缺点,探讨尚待解决的普遍问题,并突出仍需进一步研究的开放性问题。此外,从统计学角度列出了目前可用的数据集,并对其进行评估和比较,以便研究人员能更容易地选择满足他们需求的数据集。

关键词：数字说话人脸生成虚拟人语音驱动

Selective mono-arylation in palladium-catalyzed cross-coupling reaction of dichlorotriazines with phenylboronate ester derivatives

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Chinese Chemical Letters 2013年第1期24卷 41-44页

作者： Jin-Fu Dong Xin Yu cheng-Qing ning Liang Hu Nie-Fang Yu School of Pharmaceutical Sciences Central South University School of Pharmaceutical Sciences Sun Yat-sen University

Palladium-catalyzed cross-coupling reaction between dichlorotriazines and phenylboronate esters produced the mono-awlated triazines selectively and thus, the corresponding phenyltriazine derivatives could be assembled... 详细信息

关键词： Suzuki cross-coupling reactionDichlorotriazinesAryl boronic estersPd(PPh3)4