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温度传感器在燃气计量仪表中的应用研究

仪器仪表用户 2020年第11期27卷 16-19页

作者：杨国芬苏苗候郭杨严侯畔畔陈跃跃天信仪表集团有限公司浙江苍南325800

基于涡轮流量计,对温度传感器在涡轮流量计上的不同安装方式,其检测的温度是否存在差异;在正常安装方式下,温度传感器对环境温度是否敏感等方面进行试验研究。研究表明:试验检测出来的温度差异是在可允许范围内的;同样地,温度传感器对... 详细信息

基于涡轮流量计,对温度传感器在涡轮流量计上的不同安装方式,其检测的温度是否存在差异;在正常安装方式下,温度传感器对环境温度是否敏感等方面进行试验研究。研究表明:试验检测出来的温度差异是在可允许范围内的;同样地,温度传感器对环境温度变化的敏感度很低,满足燃气计量仪表的要求。

关键词：涡轮流量计温度传感器检测差异敏感度

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带GPRS通信的流量计诊断器的研制

仪器仪表用户 2018年第7期25卷 6-10页

作者：李丕想黄书成陈永生侯畔畔陈燕虹天信仪表集团有限公司浙江苍南325800

随着中国天然气行业进入高速发展期,气体流量计作为一种天然气贸易的计量仪表,它的性能直接影响到贸易双方的经济利益。本文简述了一种提供更好的诊断技术和多样性的诊断方法,从而降低流量计的运行成本并提高可靠性。其中,通过压损的大... 详细信息

随着中国天然气行业进入高速发展期,气体流量计作为一种天然气贸易的计量仪表,它的性能直接影响到贸易双方的经济利益。本文简述了一种提供更好的诊断技术和多样性的诊断方法,从而降低流量计的运行成本并提高可靠性。其中,通过压损的大小来判断流量计是否出现异常。对于气体涡轮流量计,通过检测高低频信号输出情况也可以判断涡轮叶片或减速机构的传动比是否已发生损坏。对于旋进旋涡流量计可检测流体振动信号受压力波动或机械振动干扰的程度,从而判断旋进流量计是否适合用于其所处的使用场合。并且采用GPRS无线通信技术,实现将测量的过程参数远传至数据中心,组成远程数据采集监控系统(SCADA)。

关键词： GPRS通信天然气计量流量计压损鉴相电压

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高压气体涡轮流量计研究

自动化仪表 2018年第8期39卷 84-88页

作者：杨国芬章宦辉叶友意苏苗候华威侯畔畔天信仪表集团有限公司浙江苍南325800

针对目前市场对计量高压气体流量计的大量需求,设计了一种新型高压气体涡轮流量计的结构方案。在常压气体涡轮流量计研究的基础上,对壳体的材料与结构、主轴承的供油系统及其轴向缓冲结构进行研究。采用理论分析、结构设计以及试验验证... 详细信息

针对目前市场对计量高压气体流量计的大量需求,设计了一种新型高压气体涡轮流量计的结构方案。在常压气体涡轮流量计研究的基础上,对壳体的材料与结构、主轴承的供油系统及其轴向缓冲结构进行研究。采用理论分析、结构设计以及试验验证,研制了适用于高压环境的气体涡轮流量计。通过耐压试验台装置模拟管道介质压力,对流量计供油系统及主承压壳体进行可靠性测试;根据测试试验数据,提出关于推力与活塞面积、介质接触面积以及介质压力之间所存在的经验公式;通过高压环道装置,在不同压力、不同流量下,对整机进行示值误差性能测试及分析,以优化轴向缓冲结构。测试结果表明,该新型高压气体涡轮流量计能安全、准确,可长期应用于高压介质计量领域。

关键词：高压气体涡轮流量计壳体供油西气东输轴承

Mitochondrial genome of Chthamalus challengeri(Crustacea:Sessilia): gene order comparison within Chthamalidae and phylogenetic consideration within Balanomorpha

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Acta Oceanologica Sinica 2019年第6期38卷 25-31页

作者： panpan Chen Jun Song Xin Shen Yuefeng Cai Ka hou Chu Yongqi Li Mei Tian Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology Huaihai Institute of TechnologyLianyungang 222005China Co-Innovation Center of Jiangsu Marine Bio-industry Technology Lianyungang 222000China Simon F. S. Li Marine Science Laboratory School of Life SciencesThe Chinese University of Hong KongShatinN.T.Hong KongChina

Acorn barnacles are important model species in researches on intertidal ecology, larval development and biofouling. At present, with the development of mitochondrial genomics, it is helpful to understand the phylogenetic relationship from the mitogenomic level. The complete mitochondrial genome of Chthamalus challengeri was presented. The genome is a circular molecule of 15 358 bp. Compared with other species in Balanomorpha, the non-coding region is longer, while the length of the genes is similar to the other species. The overall A+T content of the mitochondrial genome of C. challengeri is 70.5%. There are variations of initiation and stop codons in the known Balanomorpha mitochondrial genomes. The C. challengeri and C. antennatus within the same genus share the identical gene arrangement. However, the gene arrangement of different genera in Chthamalidae is different, as there is a translocation between two tRNA genes and an inversion involving a large gene block. In particular, both srRNA and lrRNA of the two species in Chthamalus are encoded in the heavy strand, differing from the former Balanomorpha species. The topology and gene arrangement in Chthamalidae support each other. Phylogenetic analysis indicates that the Chthamalidae is monophyletic, while the Balanidae and Archaeobalanidae are polyphyletic.

关键词： Balanomorpha Chthamalus challengeri mitochondrial genome gene rearrangement phylogeny

Chlorofullerene C_(60)Cl_(6) Enables Efficient and Stable Tin-Based Perovskite Solar Cells

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Energy & Environmental Materials 2024年第1期7卷 176-183页

作者： Jingfu Chen Chengbo Tian Chao Sun panpan Yang Wenjing Feng Lingfang Zheng Liu Yang Enlong hou Jiefeng Luo Liqiang Xie Zhanhua Wei Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and EngineeringHuaqiao UniversityXiamen 361021China

Tin-based perovskite solar cells(TPSCs)have received great attention due to their eco-friendly properties and high theoretical ***,the fast crystallization feature of tin-based perovskites leads to poor film quality and limits the corresponding device ***,a chlorofullerene,C_(60)Cl_(6),with six chlorine attached to the C_(60)cage,is applied to modulate the crystallization process and passivate grain boundary defects of the perovskite *** chemical interactions between C_(60)Cl_(6)and perovskite components retard the transforming process of precursors to perovskite crystals and obtain a high-quality tin-based perovskite *** is also revealed that the C_(60)Cl_(6)located at the surfaces and grain boundaries can not only passivate the defects but also offer a role in suturing grain boundaries to suppress the detrimental effects of water and oxygen on perovskite films,especially the oxidation of Sn^(2+)to Sn^(4+).As a result,the C_(60)Cl_(6)-based device yields a remarkably improved device efficiency from 10.03%to 13.30%with enhanced *** work provides a new strategy to regulate the film quality and stability of TPSCs using functional fullerene materials.

关键词： crystallization regulation defect passivation fullerene derivative perovskites solar cell tin-based perovskite

The incidence rate and histological characteristics of intimal hyperplasia in elastase-induced experimental abdominal aortic aneurysms in mice

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Animal Models and Experimental Medicine 2024年第3期7卷 388-395页

作者： Meng Li panpan Wei Kexin Li Haole Liu Naqash Alam Haiwen hou Jie Deng Baohui Xu Enqi Liu Sihai Zhao Yankui Li Laboratory Animal Center Xi'an Jiaotong UniversityXi'anChina Department of Vascular Surgery The Second Hospital of Tianjin Medical UniversityTianjinChina Department of Cardiology The Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina Department of Vascular Surgery Stanford University School of MedicineStanfordCaliforniaUSA

Intimal hyperplasia(IH)is a negative vascular remodeling after arterial *** occasionally occurs in elastase-induced abdominal aortic aneurysm(AAA)mouse *** study aims to clarify the incidence and histological characteristics of IH in aneurysmal mice.A retrospective study was conducted by including 42 male elastaseinduced mouse AAA *** IH incidence,aortic diameters with or without IH,and hyperplasia lesional features of mice were *** 42 elastase-induced AAA mouse models,10 mice developed mild IH(24%)and severe IH was found in only 2 mice(5%).The outer diameters of the AAA segments in mice with and without IH did not show significant *** mild and severe IH lesions show strong smooth muscle cell positive staining,but endothelial cells were occasionally observed in severe IH *** was obvious macrophage infiltration in the IH lesions of the AAA mouse models,especially in mice with severe ***,only a lower numbers of T cells and B cells were found in the IH *** cell-secreted matrix metalloproteinases(MMP)2 was highly expressed in all IH lesions,but MMP9 was only overexpressed in severe *** conclusion,this study is the first to demonstrate the occurrence of aneurysmal IH and its histological characteristics in an elastaseinduced mouse AAA *** will help researchers better understand this model,and optimize it for use in AAA-related research.

关键词： abdominal aortic aneurysms animal model histology intimal hyperplasia

J-shaped association between dietary zinc intake and new-onset hypertension:a nationwide cohort study in China

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Frontiers of Medicine 2023年第1期17卷 156-164页

作者： panpan He Huan Li Mengyi Liu Zhuxian Zhang Yuanyuan Zhang Chun Zhou Ziliang Ye Qimeng Wu Min Liang Jianping Jiang Guobao Wang Jing Nie Fan Fan hou Chengzhang Liu Xianhui Qin Division of Nephrology Nanfang HospitalSouthern Medical UniversityNational Clinical Research Center for Kidney DiseaseState Key Laboratory of Organ Failure ResearchGuangdong Provincial Institute of NephrologyGuangdong Provincial Key Laboratory of Renal Failure ResearchGuangdong Provincial Clinical Research Center for Kidney DiseaseGuangzhou Regenerative Medicine and Health Guangdong LaboratoryGuangzhou 510515China Department of Epidemiology and Biostatistics School of Public HealthAnhui Medical UniversityHefei 230032China Institute of Biomedicine Anhui Medical UniversityHefei 230032China

We aimed to investigate the relationship of dietary zinc intake with new-onset hypertension among Chinese adults.A total of 12,177 participants who were free of hypertension at baseline from the China Health and Nutrition Survey were *** intake was assessed by three consecutive 24-h dietary recalls combined with a household food *** with systolic blood pressure≥140 mmHg or diastolic blood pressure≥90 mmHg or diagnosed by a physician or under antihypertensive treatment during the follow-up were defined as having new-onset *** a median follow-up duration of 6.1 years,4269 participants developed new-onset ***,the association between dietary zinc intake and new-onset hypertension followed a J-shape(P for non-linearity<0.001).The risk of new-onset hypertension significantly decreased with the increment of dietary zinc intake(per mg/day:hazard ratio(HR)0.93;95%confidence interval(CI)0.88–0.98)in participants with zinc intake<10.9 mg/day,and increased with the increment of zinc intake(per mg/day:HR 1.14;95%CI 1.11–1.16)in participants with zinc intake≥10.9 mg/*** conclusion,there was a J-shaped association between dietary zinc intake and new-onset hypertension in general Chinese adults,with an inflection point at about 10.9 mg/day.

关键词： dietary zinc intake new-onset hypertension general population CHNS

Functional gastrointestinal disorders,mental health,genetic susceptibility,and incident chronic kidney disease

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Chinese Medical Journal 2024年第9期137卷 1088-1094页

作者： Mengyi Liu panpan He Ziliang Ye Sisi Yang Yanjun Zhang Qimeng Wu Chun Zhou Yuanyuan Zhang Fan Fan hou Xianhui Qin Division of Nephrology Nanfang HospitalSouthern Medical UniversityNational Clinical Research Center for Kidney DiseaseState Key Laboratory of Organ Failure ResearchGuangdong Provincial Institute of NephrologyGuangdong Provincial Key Laboratory of Renal Failure ResearchGuangzhouGuangdong 510515China

Background:Whether functional gastrointestinal disorders(FGIDs)are associated with the long-term risk of chronic kidney disease(CKD)remains *** aimed to investigate the prospective association of FGIDs with CKD and examine whether mental health mediated the ***:About 416,258 participants without a prior CKD diagnosis enrolled in the UK Biobank between 2006 and 2010 were *** with FGIDs(including irritable bowel syndrome[IBS],dyspepsia,and other functional intestinal disorders[FIDs;mainly composed of constipation])were the exposure group,and non-FGID participants were the non-exposure *** primary outcome was incident CKD,ascertained from hospital admission and death registry records.A Cox proportional hazard regression model was used to investigate the association between FGIDs and CKD,and the mediation analysis was performed to investigate the mediation proportions of mental ***:At baseline,33,156(8.0%)participants were diagnosed with FGIDs,including 21,060(5.1%),8262(2.0%),and 6437(1.6%)cases of IBS,dyspepsia,and other FIDs,*** a mean follow-up period of 12.1 years,11,001(2.6%)participants developed *** were significantly associated with a higher risk of incident CKD compared to the absence of FGIDs(hazard ratio[HR],1.36;95%confidence interval[CI],1.28-1.44).Similar results were observed for IBS(HR,1.27;95%CI,1.17-1.38),dyspepsia(HR,1.30;95%CI,1.17-1.44),and other FIDs(HR,1.60;95%CI,1.43-1.79).Mediation analyses suggested that the mental health score significantly mediated 9.05%of the association of FGIDs with incident CKD and 5.63-13.97%of the associations of FGID subtypes with ***,the positive associations of FGIDs and FGID subtypes with CKD were more pronounced in participants with a high genetic risk of ***:Participants with FGIDs had a higher risk of incident CKD,which was partly explained by mental health scores and was more pronounced in those with high gen

关键词： Functional gastrointestinal disorders Chronic kidney diseases Genetic susceptibility Mental health

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气体介质绝缘强度的化学键组合理论

高等学校化学学报 2024年第1期45卷 53-60页

作者：衡盼盼张咪侯华王宝山武汉大学化学与分子科学学院武汉430072

寻找能够替代SF6的新型绝缘气体介质非常具有挑战性,采用构效关系模型进行虚拟筛选是发现目标替代气体的有效手段.受计算资源限制,亟需发展准确快速计算气体绝缘强度的理论方法.本文建立了基于化学键理论的气体绝缘强度计算方法,根据分... 详细信息

寻找能够替代SF6的新型绝缘气体介质非常具有挑战性,采用构效关系模型进行虚拟筛选是发现目标替代气体的有效手段.受计算资源限制,亟需发展准确快速计算气体绝缘强度的理论方法.本文建立了基于化学键理论的气体绝缘强度计算方法,根据分子的价键结构确定化学键类型和数目,优化各化学键的特征绝缘强度,累加获得任意气体的绝缘强度.与63种气体的实验结果相比,理论值与实验值的相关系数和均方根误差分别为0.970和0.16,能够满足高通量虚拟筛选的计算需求.揭示了气体绝缘强度与化学键的内在关联,提出了若干具有应用潜力的新型绝缘气体分子结构.

关键词：六氟化硫替代气体绝缘强度化学键构效关系虚拟筛选