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Thin-walled and large-sized magnesium alloy die castings for passenger car cockpit:Application,materials,and manufacture

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China Foundry 2024年第5期21卷 525-545页

作者： Lei Zhan yu-meng sun Yang Song Chun-hua Kong Kai Ma Bai-xin Dong Hong-yu Yang Shi-li Shu Feng Qiu School of Automotive Engineering Jilin Communication PolytechnicChangchun 130012China Key Laboratory of Automobile Materials of Ministry of Education School of Materials Science and EngineeringNanling CampusJilin UniversityChangchun 130025China

In order to effectively reduce energy consumption and increase range mile,new energy vehicles represented by Tesla have greatly aroused the application of integrated magnesium(Mg)alloy die casting technology in ***,the application of Mg alloys in automobiles,especially in automotive cockpit components,is quite extensive,while it has almost disappeared for a period of time due to its relatively high cost,causing a certain degree of information loss in the application technology of Mg alloy parts in *** rapid development of automotive technology has led to a higher requirement for the automotive components compared with those traditional ***,whatever the components themselves,or the Mg alloy materials and die casting process have to face an increasing challenge,needing to be *** addition,owing to its high integration characteristics,the application of Mg alloy die casting technology in large-sized and thin-walled automotive parts has inherent advantages and needs to be expanded ***,it necessitates exploring advance Mg alloys and new product structures and optimizing die casting *** article summarizes and analyzes the development status of thin-walled and large-sized die casting Mg alloy parts in passenger car cockpit and corresponding material selection methods,die casting processes as well as mold design ***,this work will aid researchers in establishing a comprehensive understanding of the manufacture of thin-walled and large-sized die casting Mg alloy parts in automobile *** will also assist them in developing new Mg alloys with improved comprehensive performance and new processes to meet the high requirements for die casting automotive components.

关键词： Mg alloys thin wall large size automotive part die casting

Evapotranspiration, Yield and Crop Coefficient of Irrigated Maize Under Straw Mulch

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Pedosphere 2005年第5期15卷 576-584页

作者： ZHANG Xi-Ying CHEN Su-Ying PEI Dong LIU meng-yu sun Hong-Yong Shijiazhuang Institute of Agricultural Modernization Chinese Academy of Sciences Shijiazhuang 050021 （China）

Maize (Zea mays L.), a staple crop grown from June to September during the rainy season on the North China Plain,is usually inter-planted in winter wheat (Triticum aestivum L.) fields about one week before harvesting of the winterwheat. In order to improve irrigation efficiency in this region of serious water shortage, field studies in 1999 and 2001, twodry seasons with less than average seasonal rainfall, were conducted with up to five irrigation applications to determineevapotranspiration, calculate the crop coefficient, and optimize the irrigation schedule with maize under mulch, as well asto establish the effects of irrigation timing and the number of applications on grain yield and water use efficiency (WUE)of maize. Results showed that with grain production at about 8 000 kg ha-1 the total evapotranspiration and WUE ofirrigated maize under mulch were about 380-400 mm and 2.0-2.2 kg m-3, respectively. Also in 2001 WUE of maizewith mulch for the treatment with three irrigations was 11.8% better than that without mulch. In the 1999 and 2001seasons, maize yield significantly improved (P = 0.05) with four irrigation applications, however, further increases werenot significant. At the same time there were no significant differences for WUE with two to four irrigation *** the 2001 season mulch lead to a decrease of 50 mm in the total soil evaporation, and the maize crop coefficient undermulch varied between 0.3-1.3 with a seasonal average of 1.0.

关键词： crop coefficient maize mulch water use efficiency

Improvement in corrosion resistance of Mg_(97)Zn_(1)Y_(2)alloy by Zr addition

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China Foundry 2024年第6期21卷 634-640页

作者： Di-qing Wan yu-meng sun Yan-dan Xue Shao-yun Dong Guo-liang Han yu Wang Fan Yang Hao Tang Yong-yong Wang School of Materials Science and Engineering East China Jiaotong UniversityNanchang 330013China

Magnesium alloys,known for their exceptional lightweight properties,have presented challenges in various applications due to their limited corrosion *** this study,the corrosion resistance of Mg_(97)Zn_(1)Y_(2)magnesium alloys was enhanced by incorporating Zr elements into the Mg_(97)Zn_(1)Y_(2)matrix,which is distinguished by long periodic stacking ordered(LPSO)*** show that Mg_(97)Zn_(1)Y_(2)-xwt.%Zr(x=0,0.1,0.3,0.6)alloys containing Zr exhibit reduced hydrogen evolution rates and decreased corrosion levels compared with that without Zr,when immersed in a 3.5wt.%NaCl *** of 0.3wt.%Zr results in the most significant improvement,with a corrosion rate as low as 2.261 mL·cm^(-2),representing an 86%reduction from 16.438 mL·cm^(-2)of the base ***,alloys with Zr additions demonstrate a more positive corrosion potential and lower corrosion current density than does the matrix alloy(64.92μA·cm^(-2)).The lowest corrosion current density,21.61μA·cm^(-2),occurs with the addition of 0.3wt.%*** introduction of Zr induces a change in the microstructure of the LPSO phases,increasing the charge transfer resistance within the alloy and thus effectively improving its corrosion resistance.

关键词： magnesium alloys alloying corrosion resistance zirconium

Jiangtangjing ameliorates type 2 diabetes through effects on the gut microbiota and cAMP/PKA pathway

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Traditional Medicine Research 2022年第1期7卷 44-52页

作者： yu-meng sun Wei Qu Jia-Bao Liao Le Chen Yong-Jun Cao Hui-Lin Li Department of Diabetes and Endocrinology Nantong Affiliated Hospital of Nanjing University of Chinese MedicineNantong 226000China Department of Diabetes and Endocrinology Affiliated Traditional Chinese Medicine Hospital of Nantong UniversityNantong 226000China Department of Diabetes and Endocrinology Jiaxing Hospital of Traditional Chinese MedicineJiaxing 314000China Department of Diabetes and Endocrinology Shenzhen Affiliated Hospital of Nanjing University of Chinese MedicineShenzhen 518000China

Background:During the clinical use of Jiangtangjing granules,we have found that they improve glucose metabolism and relieve symptoms in patients with type 2 diabetes *** aimed to further investigate the hypoglycemic effects of Jiangtangjing granules and the mechanisms ***:Type 2 diabetes mellitus was induced in rats by high-fat diet feeding and streptozotocin *** rats were then orally administered Linagliptin(3 mg/kg)or Jiangtangjing granules(13 g crude preparation/kg)for 4 *** therapeutic effects of Jiangtangjing granules on glucose metabolism were then *** serum glucagon-like peptide-1,insulin and glycosylated hemoglobin concentrations were measured using enzyme linked immunosorbent *** and quantificational real-time polymerase chain reaction were performed to quantify glucagon-like peptide-1 protein expression and cAMP,protein kinase A,and Epac1 mRNA expression,*** addition,amplicon sequencing of bacterial 16s rDNA genes in rat feces was also performed to analyze the richness and diversity of the intestinal microbiota and to determine the relative abundances of the dominant bacterial phyla in the intestinal contents of the ***:Jiangtangjing reduced fasting blood glucose concentration(P<0.05)and blood glucose concentrations during oral glucose tolerance testing(P<0.01),increased serum glucagon-like peptide-1 concentration after glucose administration(P<0.05)and improved glucose tolerance(P<0.05).It also increased glucagon-like peptide-1 protein expression(P<0.05)and the mRNA expression of cAMP(P<0.05),PKA(P<0.05),and Epac1(P<0.05)in the *** also affected the composition of the intestinal microbiota in rats with type 2 diabetes ***,it increased the relative abundance of Bacteroides and reduced that of ***:Jiangtangjing granules have anti-diabetic effects,increasing circulating insulin concentration and glucose toler

关键词： Jiangtangjing granule blood glucose glucagon-like peptide-1 intestinal microbiota

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关于我国医学信息技术的发展

中国生物医学工程学报 2008年第2期27卷 161-163页

作者：俞梦孙空军航空医学研究所北京100036

本刊编委,浙江大学段会龙教授负责了本专题的策划、组稿和审阅工作,首先我们对段教授为此所付出的辛劳表示衷心的感谢!过去十年中,计算机在生物医学等领域的广泛应用,形成了大量的各类生物医学数据。如何有效地组织、分析、管理和利用... 详细信息

本刊编委,浙江大学段会龙教授负责了本专题的策划、组稿和审阅工作,首先我们对段教授为此所付出的辛劳表示衷心的感谢!过去十年中,计算机在生物医学等领域的广泛应用,形成了大量的各类生物医学数据。如何有效地组织、分析、管理和利用这些数据成为新时期生物医学工程的挑战,并推动了生物医学信息学(Biomedical Informatics)的飞速发展。生物医学信息学可理解为医学信息学(Medical Informatics)和生物信息学(Bioinformatics)的结合。医学信息学是一个利用计算机和信息技术进行医学信息交换、理解和管理的领域,其最终目的是在合适的时机和场所为医学临床决策提供支持,涵盖了所有与医学数据和知识应用相关的数据结构、算法及系统研究,包括基于生物医学信号处理、医学成像及图像处理等方法提供临床诊疗支持,面向各类医疗仪器和设备的数据采集、传输、管理和应用,以及以患者为中心的各类医疗信息系统等。当前该领域的研究重点是电子健康档案(或称电子病历),通过解决个体综合医疗健康数据的生成、融合、存储、传输、管理和利用,实现医疗卫生健康的高质量和低成本。目前很多国家和地区均已制定了长期的国家计划进行全民电子健康档案的建设。生物信息学伴随基因组学的研究而产生,主要研究分子级别的生物医学信息的储存、检索和利用。进入后基因组时代后,对基因型和表型关系的阐述成为其研究重点,近年来各类研究成果逐渐走入临床应用(如生物芯片等)。生物信息学和医学信息学的边界趋于模糊,互相渗透和结合的趋势明显。广义上,生物医学信息学可定义为与医疗服务、生物医学、公共卫生等领域中信息和知识的集成、管理和利用相关的,理论与实践研究相结合的交叉性学科领域。生物医学信息学的研究内容非常广泛,覆盖了从生物医学基础理论到医疗卫生应用的各个层次,包括新型的信息获取技术、数据标准化、广域数据交换、信息安全、高性能大规模计算、新设备和硬件技术应用、管理信息系统、电子病历、临床决策支持、工作流优化、远程医疗、自我看护、公共卫生预警、教育研究和管理、蛋白质组学、基因芯片、生物系统仿真等,很难对其进行清晰而完整的描述。本专题所邀请的该领域的几位专家从不同的侧面对生物医学信息学的一些研究工作进行介绍,以期为广大科研工作者提供一个关于生物医学信息学领域发展的概览。最后,我们要特别感谢俞梦孙院士对本专题的支持,并特为本专题撰写了关于我国医学信息技术发展的评述。

关键词：医学信息技术生物医学信息学管理信息系统生物医学工程医疗信息系统电子健康档案生物信息学后基因组时代

Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong sun Wenwen Guan Cailing Chen Chao Wu Xiaoling Liu Biao meng Tao Chen yu Han Jun Wang Shibo Xi yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Activation energy

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系统·生命·疾病·路线

医学与哲学（A） 2013年第3期34卷 1-5页

作者：俞梦孙中国人民解放军空军航空医学研究所北京100142

从系统论角度叙述了生命是功能强大的自组织系统,具有自发地走向有序结构目标,即达到健康身心状态的功能,以及适应环境的自组织性;当发生疾病时,这种以走向有序结构为目标的自组织性,体现为对病痛的自修复性。详述了呈井喷态势的慢性病... 详细信息

从系统论角度叙述了生命是功能强大的自组织系统,具有自发地走向有序结构目标,即达到健康身心状态的功能,以及适应环境的自组织性;当发生疾病时,这种以走向有序结构为目标的自组织性,体现为对病痛的自修复性。详述了呈井喷态势的慢性病是机体长期超负荷应激反应导致的整体内稳态失调、失稳所致,因而提出了以恢复整体健康为目标的健康医学模式。

关键词：自组织系统自修复性慢性非传染性疾病整体健康健康医学模式

Low‑Temperature Fabrication of Stable Black‑Phase CsPbI_(3)Perovskite Flexible Photodetectors Toward Wearable Health Monitoring

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Nano-Micro Letters 2025年第3期17卷 232-245页

作者： Yingjie Zhao Yicheng sun Chaoxin Pei Xing Yin Xinyi Li Yi Hao mengru Zhang meng yuan Jinglin Zhou yu Chen Yanlin Song College of Chemistry and Pingyuan Laboratory Zhengzhou UniversityZhengzhou 450001People’s Republic of China Key Laboratory of Green Printing Institute of ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China Key Laboratory of Bio‑Inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049People’s Republic of China

Flexible wearable optoelectronic devices fabricated fromorganic–inorganic hybrid perovskites significantly accelerate the developmentof portable energy,biomedicine,and sensing fields,but their poor thermal stabilityhinders further ***,all-inorganic perovskites possessexcellent thermal stability,but black-phase all-inorganic perovskite filmusually requires high-temperature annealing steps,which increases energy consumptionand is not conducive to the fabrication of flexible wearable *** this work,an unprecedented low-temperature fabrication of stable blackphaseCsPbI3perovskite films is demonstrated by the in situ hydrolysis reactionof diphenylphosphinic chloride *** released diphenyl phosphateand chloride ions during the hydrolysis reaction significantly lower the phasetransition temperature and effectively passivate the defects in the perovskitefilms,yielding high-performance photodetectors with a responsivity of 42.1 AW−1 and a detectivity of 1.3×10^(14)***,high-fidelity imageand photoplethysmography sensors are demonstrated based on the fabricated flexible wearable *** work provides a newperspective for the low-temperature fabrication of large-area all-inorganic perovskite flexible optoelectronic devices.

关键词： In situ hydrolyzation Low-temperature processing All-inorganic perovskite Flexible photodetectors Health monitoring

生物电放大电路的50 Hz干扰分析与电路设计(英文)

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中国组织工程研究与临床康复 2008年第9期12卷 1782-1786页

作者：姬军俞梦孙解放军第三0五医院北京市100017 解放军空军航空医学研究所北京市100036

背景:在某些临床应用场合或特殊工作环境中,存在特别强烈的50Hz干扰,放大器的输出已经达到或接近饱和状态,一般的抗干扰电路和软件算法难以有效抑制。因此必须通过改进硬件电路抑制干扰以得到满意的信号。目的:介绍一种生物电放大器可... 详细信息

背景:在某些临床应用场合或特殊工作环境中,存在特别强烈的50Hz干扰,放大器的输出已经达到或接近饱和状态,一般的抗干扰电路和软件算法难以有效抑制。因此必须通过改进硬件电路抑制干扰以得到满意的信号。目的:介绍一种生物电放大器可以有效抑制50 Hz交流电干扰对微弱电生理信号检测的影响。设计:采用先进行理论分析,建立电路模型,再以软件仿真,最后设计实现实际应用电路。单位:解放军第三○五医院,空军航空医学研究所。材料:设计50 Hz交流电干扰的等效模型电路及电路仿真软件TINA RPO6.0均由空军航空医学研究所提供,高压电场实验环境由解放军第三○五医院提供的高压电场治疗仪制造。方法:首先在空军航空医学研究所进行理论分析,建立50 Hz干扰模型。提出下列三点抗干扰的措施,并应用在电路模型中:①提高整体电路共模输入阻抗以消除皮肤接触阻抗匹配失衡。②共模电压源控制恒流源降低仪表放大器等效共模输入阻抗。③右腿驱动电路减小共模电压。并且通过应用电路仿真软件TINA PRO对上述电路模型进行仿真分析。通过不断改进电路模型,获得正确的仿真结果。根据电路模型,设计实现了能够在强烈干扰环境下有效抑制50 Hz干扰的心电放大器。并在解放军第三○五医院高压电场治疗仪制造的强烈干扰环境下进行了实际使用,有效抑制了50 Hz干扰,获得高质量的心电信号。主要观察指标:通过电路共模抑制比和在强烈干扰环境下获得信号的频谱来评价抗50Hz交流干扰的能力。结果:为输入回路串接一个100 Ω和200 kΩ电阻以建立皮肤接触阻抗匹配失衡的状态。皮肤接触阻抗匹配失衡为100Ω时放大器在共模电压源的作用下,输出幅度为1.69mV峰峰值。根据计算,共模抑制比为125.8dB。皮肤接触阻抗匹配失衡为200 k Ω时放大器在共模电压源的作用下,输出幅度为1.78mV峰峰值。根据计算,共模抑制比为125.3dB。由频率为20Hz,幅度为50μV峰峰值,相位相反的两个电压源构成差模信号。1000倍的放大倍数。在电路的输入回路中,串接一个200 kΩ电阻以建立皮肤接触阻抗匹配失衡的状态。放大器的输出结果为50mV峰峰值;输出波形的快速傅立叶变换频谱中没有50 Hz谱线。结论:仿真实验和实际应用都表明该放大器在强烈50Hz交流电干扰和皮肤接触阻抗匹配严重失衡的条件下具有良好的干扰抑制能力和微弱信号放大能力。

关键词： 50Hz交流电干扰生物电放大器共模抑制比生物医学工程