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Effect of power supply parameters on discharge characteristics and sterilization efficiency of magnetically driven rotating gliding arc

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Plasma Science and Technology 2024年第9期26卷 61-68页

作者： Shaohua QIN Meizhi WANG Jun DU lanlan NIE jie PAN School of Physics and Electronics Shandong Normal UniversityJinan 250014People’s Republic of China School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

Plasma sterilization is a new generation of high-tech sterilization method that is fast,safe,and pollution *** is widely used in medical,food,and environmental protection *** air sterilization is an emerging field of plasma application,which puts higher requirements on the miniaturization,operational stability,and operating cost of plasma *** this study,a novel magnetically driven rotating gliding arc(MDRGA)discharge device was used to sterilize Lactobacillus *** with the traditional gas-driven gliding arc,this device has a simple structure and a more stable gliding *** using COMSOL Multiphysics showed that adding permanent magnets can form a stable magnetic field,which is conducive to the formation of gliding *** on the discharge performance,ozone concentration,and sterilization effect were conducted using different power supply *** results revealed that the MDRGA process can be divided into three stages:starting,gliding,and *** voltage was the key factor for stable arc gliding,and both high and low voltages were not conducive to stable arc gliding and ozone *** this experimental setup,the sterilization effect was the best at 6.6 kV.A high modulation duty ratio was beneficial for achieving stable arc ***,when the duty ratio exceeded a certain value,the improvement in the sterilization effect was ***,considering the sterilization effect and energy factors comprehensively,we chose 80%as the optimal modulation duty ratio for this experimental device.

关键词： plasma magnetically driven rotating gliding arc sterilization

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G^(1)连续组合曲线曲面的构造

计算机辅助设计与图形学学报 2024年第7期36卷 1034-1046页

作者：严兰兰付雨楠揭梦柔刘喆东华理工大学理学院南昌330013

为了在保留B样条方法自动光滑性的基础上突破其要求各部分曲线曲面的次数必须相等的限制,同时赋予曲线曲面独立于控制顶点的形状可调性,提出一种G^(1)连续组合曲线曲面的构造方法.首先构造一组含2个自由参数的n(n≥2)次基函数并分析其性... 详细信息

为了在保留B样条方法自动光滑性的基础上突破其要求各部分曲线曲面的次数必须相等的限制,同时赋予曲线曲面独立于控制顶点的形状可调性,提出一种G^(1)连续组合曲线曲面的构造方法.首先构造一组含2个自由参数的n(n≥2)次基函数并分析其性质,基于该基函数,定义了结构与n次Bézier曲线曲面相同的新曲线曲面,其包含n次Bézier曲线曲面为特例;然后分析新曲线曲面的G^(1)光滑拼接条件,根据拼接条件,采用与B样条方法相同的组合思想但是不同的组合方式,定义基于新曲线曲面的分段组合曲线与分片组合曲面,其包含2次均匀和2次准均匀B样条为特例.实例结果表明,定义方式自动保证了组合曲线曲面在连接处的G^(1)连续性,组合曲线曲面的端点与角点位置以及内部形状都可以通过改变自由参数的取值来进行调整,且调整方式既可以是全局的又可以是局部的;所提方法为复杂曲线曲面的造型设计提供了便利.

关键词：曲线曲面设计组合曲线曲面 Bézier方法 B样条方法几何连续性

拟合楼层反应谱的三向地震动时程生成方法研究

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应用力学学报 2024年第2期41卷 422-431页

作者：杨兰兰陈杰徐明悦付晨吉锋江南大学环境与土木工程学院无锡214122 中国地震局工程力学研究所地震工程与工程振动重点实验室哈尔滨150086 成都理工大学地质灾害防治与地质环境保护国家重点实验室成都610059

为获得满足规范要求的拟合楼层反应谱的三向地震动时程,采用六阶常微分方程的本征函数为基函数,分解并重构天然地震动时程;通过构建影响矩阵,迭代计算逐步调整本征函数的幅值系数,最终实现预设拟合精度;引入正交化方法保证三向地震动时... 详细信息

为获得满足规范要求的拟合楼层反应谱的三向地震动时程,采用六阶常微分方程的本征函数为基函数,分解并重构天然地震动时程;通过构建影响矩阵,迭代计算逐步调整本征函数的幅值系数,最终实现预设拟合精度;引入正交化方法保证三向地震动时程两两之间的统计独立性,并通过两组算例提供验证。研究结果表明,迭代所得时程反应谱与目标楼层反应谱的拟合精度较高,迭代过程中时程反应谱均匀一致地向目标谱逼近,迭代过程收敛,所得三向地震动时程均无零飘现象,满足规范要求。

关键词：抗震设计与分析楼层反应谱地震动时程拟合互相关系数本征函数

AIGC视域下科学数据开放共享风险及对策——基于WSR理论分析框架

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档案管理 2024年第4期 18-21,26页

作者：朱兰兰高玉婷霍婕郑州航空工业管理学院

科学数据是国家战略性资源和重要生产力,基于AIGC技术将其开放共享顺应了开放科学和数字经济发展的趋势,有助于实现数据价值及增值,但同时也产生了不可避免的风险。本文基于WSR方法论,从“物理”“事理”“人理”三个维度构建了理论分... 详细信息

科学数据是国家战略性资源和重要生产力,基于AIGC技术将其开放共享顺应了开放科学和数字经济发展的趋势,有助于实现数据价值及增值,但同时也产生了不可避免的风险。本文基于WSR方法论,从“物理”“事理”“人理”三个维度构建了理论分析框架,在此基础上,分析了AIGC视域下科学数据开放共享的风险因素,并从技术治理、主体协同、伦理遵循三个方面提出了解决路径,以期为AIGC视域下科学数据的开放共享工作提供有益参考。

关键词：人工智能科学数据 WSR方法论物理事理人理开放共享风险共治

基于谱效关系筛选广西甜茶调节脂代谢活性质量标志物

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食品工业科技 2024年第13期45卷 17-29页

作者：樊兰兰巫秋连黄万方姜蔓菁潘东进凌洁广西中医药大学药学院广西南宁530200 广西高校中药提取纯化与质量分析重点实验室广西南宁530200 广西中医药大学海洋药物研究院广西南宁530200

目的:基于谱效关系筛选广西甜茶调节脂代谢活性部位中的质量标志物。方法:采用95%乙醇提取广西甜茶,依次用石油醚、氯仿、乙酸乙酯、正丁醇进行萃取得到不同萃取部位,将不同萃取部位溶液作用于诱导分化后的3T3-L1前脂肪细胞,以油红O染... 详细信息

目的:基于谱效关系筛选广西甜茶调节脂代谢活性部位中的质量标志物。方法:采用95%乙醇提取广西甜茶,依次用石油醚、氯仿、乙酸乙酯、正丁醇进行萃取得到不同萃取部位,将不同萃取部位溶液作用于诱导分化后的3T3-L1前脂肪细胞,以油红O染色法和细胞甘油三酯释放量为指标,筛选活性部位。采用超高效液相色谱-四极杆飞行时间质谱(UPLC-Q-TOF-MS/MS)对活性部位进行成分分析和解析,基于灰色关联度法和偏最小二乘回归法分析活性部位共有峰与其调节脂代谢药效之间的谱效关系,筛选质量标志物。结果:乙酸乙酯及正丁醇萃取部位为调节脂代谢的活性部位,鞣花酸、矢车菊素-3-O-芸香糖苷、甜茶素和对映-贝壳杉-16-烯-19-羧酸-13-O-β-D-葡萄糖苷4个成分与调节脂代谢活性作用高度相关,可作为甜茶调节脂代谢活性的质量标志物。结论:基于谱效关系的广西甜茶质量标志物的研究,对阐明药效物质基础、筛选与药效相关的核心质量标志物、保证药材质量的可控性和合理应用有重要意义。

关键词：广西甜茶 3T3-L1细胞脂代谢谱效关系质量标志物

Enthalpy induced phase partition toward hierarchical,nanostructured high-entropy alloys

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Nano Research 2022年第6期15卷 4893-4901页

作者： Rong Guo lanlan Yu Zhenyu Liu jie Pan Yonggang Yao Lin Liu State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Heterogeneous nanostructured metals are emerging strategies for achieving both high strength and ductility,which are particularly attractive for high entropy alloys(HEAs)to combine the synergistic enhancements from multielement composition,grain boundaries,and heterogeneity ***,the construction of heterogeneous nanostructured HEAs remains elusive and can involve delicate processes that are not practically *** we report using composition design(i.e.,enthalpy engineering)to create hierarchical,nanostructured HEAs as demonstrated by adding Ni into FeCrCoAlTi_(0.5)*** strong enthalpic interaction between(Ni,Co)and(Al,Ti)pairs in FeCrCoAlTi_(0.5)Nix(x=0.5–1.5)induced phase partitions into B2(ordered phase,hard)matrix and A2(disordered phase,soft)precipitates,resulting in a hierarchical structure of B2 grains and sub-grains of near-coherent A2 nanodomains(~12.5 nm)divided by A2 interdendritic *** a result,the FeCrCoAlTi_(0.5)Ni_(0.5)HEA with this unique hierarchical nanostructure exhibits the best combination of strength and plasticity,i.e.,a 2-fold increase in compressive strength(2.60 GPa)and significant enhancement of plastic strain(15.8%)as compared with the original FeCrCoAlTi_(0.5)*** analysis and simulation study reveal the phase partition process during cooling induced by an enthalpy-driven order-disorder transition while the order parameters illustrate the strong ordering in(Ni,Co)(Al,Ti)-rich B2 phase and high entropy mixing in less interactive FeCrCo-rich A2 *** work therefore provides a strategy for hierarchical nanostructured HEA formation by composition design considering enthalpy and entropy interplay.

关键词： nanocrystalline high-entropy alloys enthalpy hierarchical structures coherent precipitates

Many-body dissipative particle dynamics with energy conservation:temperature-dependent long-term attractive interaction

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Applied Mathematics and Mechanics(English Edition) 2022年第4期43卷 497-506页

作者： jie LI Kaixuan ZHANG Chensen LIN lanlan XIAO Yang LIU Shuo CHEN School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai 200092China Institute of Biomechanics and Medical Engineering AMLDepartment of Engineering MechanicsTsinghua UniversityBeijing 100084China School of Mechanical and Automotive Engineering Shanghai University of Engineering ScienceShanghai 201620China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Heat and mass transfer during the process of liquid droplet dynamic behaviors has attracted much attention in *** mesoscopic scale,numerical simulations of liquid droplets motion,such as impacting,sliding,and coalescence,have been widely studied by using the particle-based method named many-body dissipative particle dynamics(MDPD).However,the detailed information on heat transfer needs further *** paper develops a modified MDPD with energy conservation(MDPDE)by introducing a temperature-dependent long-term attractive *** fitting or deriving the expressions of the strength of the attractive force,the exponent of the weight function in the dissipative force,and the mesoscopic heat friction coefficient about temperature,we calculate the viscosity,self-diffusivity,thermal conductivity,and surface tension,and obtain the Schmidt number Sc,the Prandtl number P r,and the Ohnesorge number Oh for 273 K to 373 *** simulation data of MDPDE coincide well with the experimental data of water,indicating that our model can be used to simulate the dynamic behaviors of liquid ***,we compare the equilibrium contact angle of droplets wetting on solid surfaces with that calculated from three interfacial tensions by MDPDE *** coincident results not only stand for the validation of Young’s equation at mesoscale,but manifest the reliability of our MDPDE model and applicability to the cases with free *** model can be extended to study the multiphase flow withcomplex heat and mass transfer.

关键词： surface tension Young’s equation equilibrium contact angle many-body dissipative particle dynamics with energy conservation(MDPDE)

Theil Utility Based Multi-Device Cooperation Mechanism for Service Quality Equilibrium in Ubiquitous Stub Environments

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China Communications 2014年第6期11卷 140-150页

作者： RUI lanlan MU Nan GUO Shaoyong QIU Xuesong ZHANG jie State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications AsiaInfo-Linkage Inc.

An approach to make heterogeneous devices cooperate with each other to provide ubiquitous service remains a longstanding challenge in ubiquitous environments. In addition, when multi-user request ubiquitous services simultaneously, the arbitrariness in resource allocation process easily leads to non-equilibrium of qualities of multiuser's services. Thus, How to design an effective heterogeneous devices cooperation mechanism that meet the QoS requirements and also equilibrate QoS among multi-user's services becomes a very tough problem. In the paper, Equilibrium Index and Theil Utility function are imported to establish a multidevice equilibrium cooperation model, which is benefit for resource allocation in ubiquitous environments. Then a Theil-Equilibrium based Cooperation Mechanism for multi-service is proposed. Firstly, in order to simplify calculating, a dimensionless processing is introduced. After that, a cooperation approach with Theil-Utility Heuristic algorithm is designed to choose the best solution for the simplified model. At last, the mechanism is simulated in a smart home scenario. The simulation results show that this mechanism outperforms non-equilibrium method by improving almost 40% in internal equilibrium with just reducing 0-2% in the total utility ofall the requested ubiquitous services. These data show that the proposed mechanism performs well in equilibrating qualities of multi-user's ubiquitous services.

关键词： ubiquitousstub environments cooperation among multi-device QoS equilibrium equilibrium index theil utility

以脑梗死为首发症状的卵巢癌患者围手术期护理

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中华急危重症护理杂志 2024年第3期5卷 241-243页

作者：张莉李颖陈洁扬长捷宋新颖任岚岚中国医学科学院北京协和医院妇产科北京市100730

总结1例以脑梗死为首发症状的卵巢癌患者围手术期护理体会。针对患者病情危重复杂,围手术期易诱发血栓和出血,术后并发症风险增加,患者心理康复、肢体康复等问题,组建多学科合作团队全程管理;术前充分评估病情,制订护理计划;做好桥接抗... 详细信息

总结1例以脑梗死为首发症状的卵巢癌患者围手术期护理体会。针对患者病情危重复杂,围手术期易诱发血栓和出血,术后并发症风险增加,患者心理康复、肢体康复等问题,组建多学科合作团队全程管理;术前充分评估病情,制订护理计划;做好桥接抗凝期间用药护理;积极预防肺栓塞及新发脑梗死;采用中药灌肠法预防术后肠梗阻;鼓励家属参与患者心理护理,促进康复。通过积极治疗和护理,患者于术后第9天顺利出院。术后随访6个月,恢复良好。

关键词：卵巢肿瘤脑梗死围手术期护理危重病护理