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High Technology Letters 2008年第2期14卷 199-204页

作者：王禹 Zheng Wenbo wu zhifei Tsinghua Space Center Tsinghua University 100084 Beijing P.R. Chinal Institute of Nuclear and New Energy Technology Tsinghua University 100084 Beijing P.R. ChinaI

A novel thennoelectric generating and performance measuring system （TGPMS） was designed and fabricated. TGPMS can not only achieve the function of thennoelectric generation, but also measure the thennoelectric performance parameters of the bismuth-telluride-based thennoelectric device accurately. These thennoelectric performance parameters mainly include the dependence of the Seebeck coefficient of the thennoelectric device on the device＇s temperature in the low temperature range （about 40 ~ 190~C ）, and the dependence of the power output and thermoelectric conversion efficiency on the temperature dif- ference or output load. With the optimum load, the optimal value of the power output is 3.39W when the temperature difference reaches 231.2~C, and the optimal value of the conversion efficiency is 3.22% when the temperature difference reaches 208.9~C. TGPMS provides an experimental foundation for the application of the thennoelectric generators in the space field.

关键词： thermoelectric generation performance measuring power output thermoelectric conversion efficiency

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燃料油加注船旁靠系泊方案的升级改造

船舶工程 2024年第8期46卷 24-28,67页

作者：尹悦戴志远吴智飞干兆辉王伟赵丹丹浙江海洋大学船舶与海运学院浙江舟山316022 浙江省海洋开发研究院浙江舟山316021 浙江欣海船舶设计研究院股份有限公司浙江舟山316021 舟山长宏国际船舶修造有限公司浙江舟山312000

浙江省自贸区外锚地进行海上加注服务时常受到环境条件影响,导致加注船与受注船旁靠加注时安全性低,加注效率不高。采用水动力及系泊分析软件AQWA,针对两船旁靠加注过程,基于缆绳、碰垫规格参数和旁靠系泊形式,开展船船旁靠加注时域下... 详细信息

浙江省自贸区外锚地进行海上加注服务时常受到环境条件影响,导致加注船与受注船旁靠加注时安全性低,加注效率不高。采用水动力及系泊分析软件AQWA,针对两船旁靠加注过程,基于缆绳、碰垫规格参数和旁靠系泊形式,开展船船旁靠加注时域下的运动分析。结果表明:在同样船船间距下,即碰垫规格不变时,增加缆绳数量对系泊安全有所改善,但改善空间有限;提高船船间距,即增大碰垫规格,提高碰垫刚度,对于船船旁靠系泊改善较为明显。研究结果可为今后舟山外锚地海上加注服务提供参考依据。

关键词：加注船旁靠系泊时域分析系泊优化

The preparation,characterization, and catalytic performance of porous fibrous LaFeO3 perovskite made from a sunflower seed shell template

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Frontiers of Chemical Science and Engineering 2020年第6期14卷 967-975页

作者： zhifei wu Li Wang Yixiao Hu Hui Han Xing Li Ying Wang School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China College of Science&Technology Ningbo UniversityCixi 315000China

LaFe03 perovskite with a porous fibrous structure was successfully synthesized using a sunflower seed shell as a *** investigate the effects of this template,a sample was prepared without a template via the same *** various characterization techniques,such as X-ray diffraction,scanning electron microscopy,Fourier transform infrared spectroscopy,N2 adsorption-desorption analysis,X-ray photoelectron spectroscopy,oxygen temperature programed desorption,and hydrogen temperature programed reduction,the physiochemical properties of the samples were *** results showed that the sample made with a template had a larger surface area and a larger amount of adsorbed oxygen,which further illustrated that the sunflower seed shell template had a significant impact on the physiochemical properties of the ***,we explored the catalytic activity for nitric oxide(NO)oxidation,and studied the factors affecting it,which highlighted its potential application in automobile exhausts.

关键词： NO oxidation porous fibrous LaFeO3 sunflower seed shell

Gingipain from Porphyromonas gingivalis causes insulin resistance by degrading insulin receptors through direct proteolytic effects

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International Journal of Oral Science 2024年第3期16卷 539-552页

作者： Fen Liu Bofeng Zhu Ying An zhifei Zhou Peiying Xiong Xuan Li Yang Mi Tongqiang He Faming Chen Buling wu Shenzhen Stomatology Hospital(Pingshan) Southern Medical UniversityShenzhenChina Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research Laboratory Center of StomatologyDepartment of Paediatric DentistryCollege of StomatologyXi’an Jiaotong UniversityXi’anChina State Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration National Clinical Research Center for Oral DiseasesShaanxi International Joint Research Center for Oral DiseasesDepartment of PeriodontologySchool of StomatologyThe Fourth Military Medical UniversityXi’anChina Guangzhou Key Laboratory of Forensic Multi-Omics for Precision Identification School of Forensic MedicineSouthern Medical UniversityGuangzhouChina Microbiome Medicine Center Department of Laboratory MedicineZhujiang HospitalSouthern Medical UniversityGuangzhouChina Department of Stomatology General Hospital of Tibetan Military CommandLhasaChina Department of Stomatology Center Shenzhen HospitalSouthern Medical UniversityShenzhenChina Department of Obstetrics Northwest Women’s and Children’s HospitalXi’anChina

Periodontitis is a critical risk factor for the occurrence and development of *** gingivalis may participate in insulin resistance(IR)caused by periodontal inflammation,but the functional role and specific mechanisms of *** in IR remain *** the present study,clinical samples were analysed to determine the statistical correlation between *** and IR *** culturing of hepatocytes,myocytes,and adipocytes,and feeding mice *** orally,the functional correlation between *** and IR occurrence was further studied both in vitro and in *** data suggested that the amount of *** isolated was correlated with the Homeostatic Model Assessment for IR *** vitro studies suggested that coculture with *** decreased glucose uptake and insulin receptor(INSR)protein expression in hepatocytes,myocytes,and *** fed *** tended to undergo *** was detectable in the liver,skeletal muscle,and adipose tissue of experimental *** distribution sites of gingipain coincided with the downregulation of *** proteolysed the functional insulin-binding region of *** with *** significantly decreased the INSR–insulin binding *** out gingipain from *** alleviated the negative effects of *** on IR in *** together,these findings indicate that distantly migrated *** may directly proteolytically degrade INSR through gingipain,thereby leading to *** results provide a new strategy for preventing diabetes by targeting periodontal pathogens and provide new ideas for exploring novel mechanisms by which periodontal inflammation affects the systemic metabolic state.

关键词： gingivalis inflammation resistance

Study of External Characteristics of Hydraulic Electromagnetic Regenerative Shock Absorber

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World Journal of Engineering and Technology 2019年第3期7卷 520-535页

作者： Muhammad Yousaf Iqbal zhifei wu Guangzhao Xu Syed Arslan Bukhari School of Mechanical Engineering Taiyuan University of Technology Taiyuan China

According to the composition and the principle of the liquid-electric energy-sensing damper, the corresponding hydraulic regenerative model is designed. In this paper, an advanced type of shock absorber combined with the mechanical and electromagnetic hydraulic structure has been proposed that recycles the energy dissipated by shock absorber in the driving process. In addition, the damping characteristics of the conventional mechanical vehicle and the advanced hydraulic regenerative mechanical vehicle have?been analyzed by using AMESim simulation. The regenerative suspension is reformed from the traditional hydraulic and pneumatic suspension. The suspension absorbs kinetic energy converts it into hydraulic potential and pneumatic power to be stored in the accumulator. The kinetic energy is then converted into electricity instead of heat by using the hydraulic suspension and Power-Generating Shock Absorber (PGSA). The AMESim simulation results have efficiently verified the displacement characteristics curves and flow rate of hydraulic fluid in the body. Finally the conversion of energy produced by advanced hydraulic regenerative mechanical vehicle transferred into electrical energy. The designed hydraulic shock absorber allows a significant fuel saving of 1.5% to 4% depending on the vehicle and driving conditions.

关键词： AMESim Producing Electricity Ride Comfort Hydraulic Shock Accumulator Characteristics Curves

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基于实例分割的车道线检测算法

汽车工程 2023年第2期45卷 263-272页

作者：武志斐李守彪太原理工大学机械与运载工程学院太原030024

为实现在自动驾驶复杂场景下检测数量变化的车道线,提出一种基于实例分割的车道线检测算法。首先以ResNet18网络作为主干网络提取图像特征,采用特征金字塔网络进行特征融合。同时设计一种扩张卷积残差模块来提高检测的精度;然后基于车... 详细信息

为实现在自动驾驶复杂场景下检测数量变化的车道线,提出一种基于实例分割的车道线检测算法。首先以ResNet18网络作为主干网络提取图像特征,采用特征金字塔网络进行特征融合。同时设计一种扩张卷积残差模块来提高检测的精度;然后基于车道线的位置进行实例分割,利用语义分割出的车道线点位置预测对应的聚类点位置,通过对聚类点采用DBSCAN聚类算法实现车道线实例区分。结果表明,该算法能够在复杂的自动驾驶场景下有效地进行多车道线检测,在CULane数据集和TuSimple数据集上的调和平均值分别达到75.2%和97.0%。

关键词：汽车主动安全车道线检测实例分割聚类

基于扎根理论的国家安全学学科核心素养构成研究--以美国国土安全学科为参考

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情报杂志 2022年第6期41卷 80-85页

作者：李锋吴知非西北政法大学国家安全学院西安710063

[研究目的]学科核心素养是学科发展的基础要素,是连接学生个人发展与学科教学实践的桥梁。明确国家安全学学科核心素养,对国家安全学未来发展具有重要指导作用。[研究方法]以美国国土安全学科为参考对象,利用扎根理论对其学科组成进行... 详细信息

[研究目的]学科核心素养是学科发展的基础要素,是连接学生个人发展与学科教学实践的桥梁。明确国家安全学学科核心素养,对国家安全学未来发展具有重要指导作用。[研究方法]以美国国土安全学科为参考对象,利用扎根理论对其学科组成进行定性分析,归纳学科核心素养。[研究结论]新时代背景下的国家安全学学科在回答“培养什么样的人”这一问题时,应坚持以安全战略意识、系统分析思维、预防处置导向、实务工作能力、总体安全立场、家国情怀信仰等作为学科核心素养,引领学科未来发展方向,稳步提升人才培养质量。

关键词：国家安全学核心素养学科建设国土安全扎根理论

酱香型白酒轮次酒的醛类物质与对应出窖糟醅的理化指标相关性研究

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中国酿造 2024年第6期43卷 151-155页

作者：郭世鑫李细芬卢延想侬杨勇陆安谋吴知非石禾云张金林曾露燕秦培军梁慧珍张长霞贵州国台酒业股份有限公司贵州遵义564501 贵州国台酒业集团研究院天津300410

乙醛、乙缩醛和糠醛含量对酱香型白酒的风味有一定影响。该研究通过主成分分析(PCA)、偏最小二乘判别分析(PLS-DA)和皮尔逊(Pearson)相关性分析对1~7轮次酱香型白酒样的醛类物质含量和对应出窖糟醅的理化指标进行了分析。结果表明,乙醛... 详细信息

乙醛、乙缩醛和糠醛含量对酱香型白酒的风味有一定影响。该研究通过主成分分析(PCA)、偏最小二乘判别分析(PLS-DA)和皮尔逊(Pearson)相关性分析对1~7轮次酱香型白酒样的醛类物质含量和对应出窖糟醅的理化指标进行了分析。结果表明,乙醛和乙缩醛含量1~4轮次酒增加,5轮次酒降低,5~7轮次酒增加,7轮次酒达到最高,分别为487.12 mg/L、360.94 mg/L;糠醛含量随着轮次增加而增加,7轮次酒达到最高,为623.63 mg/L。出窖糟醅的水分、糖分含量和酸度随着轮次增加均为先升高后降低,淀粉含量随着轮次增加而降低。1~3轮次酒的醛类物质及出窖糟醅理化指标与4~7轮次存在较大差异。乙醛、乙缩醛和糠醛与淀粉含量呈极显著负相关(P<0.01),与糖分、酸度、水分呈极显著正相关(P<0.01)。在生产过程中需要严格控制这些指标,以确保基酒的质量和稳定性。

关键词：酱香型白酒乙醛乙缩醛糠醛糟醅理化指标

Surgical techniques for improving hemostasis during Bentall procedure

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Journal of Medical Colleges of PLA(China) 2009年第2期24卷 99-104页

作者： Peng Hao Xu zhifei Zhao Xuewei wu Lihui Xue Lei Chen Xiaofang Department of Thoracic and Cardiovascular Surgery Changzheng Hospital Second Military Medical University Shanghai 200003 China

Objective:To evaluate the effect of modified surgical techniques on hemostasis used in aortic root replacement with a composite graft(Bentall procedure).Methods:Data on 15 patients who underwent Bentall procedure during 2005 to 2007 were *** first 5 patients(Group 1) received the standard *** next 10 patients(Group 2) received the modified *** including "tandem suture line","endo-button buttress","sandwich anastomosis" and "left ventricle filling" were added to the standard *** bleeding and the volume of blood transfusion required were compared to estimate hemostasis in different ***:Between groups 1 and 2,a significant difference was found in postoperative bleeding [(2193±383) ml vs(1012±258) ml,respectively;P<0.05] and in volume of blood transfusion required [(7242±1416) ml vs(2520±708) ml,respectively;P<0.05].Conclusion:The modified surgical techniques used in our study are effective in the improvement of the hemostasis in Bentall procedure.

关键词： Ascending aortic aneurysm Bentall procedure Hemostasis