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标准表法检定油流量计的适应性

油气田地面工程 2012年第10期31卷 65-66页

作者：于强任彬唐红伟青海油田采油三厂青海油田采油一厂青海油田采油二厂

油流量计的检定方法有标准表法、容积法和质量法。在实际工作中,用标准表法检定腰轮流量计无法满足检定规程的检定条件。为此,将标准装置改用标准体积管来检定腰轮流量计;在检定腰轮流量计中间流量点时,开启回流阀,至少以130 m3/h的流... 详细信息

油流量计的检定方法有标准表法、容积法和质量法。在实际工作中,用标准表法检定腰轮流量计无法满足检定规程的检定条件。为此,将标准装置改用标准体积管来检定腰轮流量计;在检定腰轮流量计中间流量点时,开启回流阀,至少以130 m3/h的流量将检定后的一部分外输液经回流阀返回到缓冲罐,用于补充缓冲罐内液量的不足。改造工艺流程能够满足3个检定点连续3次检定以及《液体容积式流量计(JJG 667—1997)》检定规程的检定条件,提高了腰轮流量计的计量精度。

关键词：腰轮流量计检定标准表法

Cooperative Target Fencing of multiple Vehicles for a General Target with Connectivity Preservation and Collision Avoidance

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Journal of Systems Science & Complexity 2024年第1期37卷 136-151页

作者： PAN Zini CHEN Ben m Department of mechanical and Automation Engineering The Chinese University of Hong KongHong KongChina

In this paper,the authors study the cooperative target-fencing problem for n-dimensional systems and a target with a general *** using the velocity of the vehicles,a position feedback control law is proposed to fence the general target into the convex hull formed by the ***,the dynamics of each vehicle is described by a double-integrator *** potential functions are designed to guarantee connectivity preservation of the communication network and collision avoidance among the *** proposed approach can deal with a target whose trajectory is any twice continuously differentiable function of *** effectiveness of the result is verified by a numerical example.

关键词： multi-agent systems networked systems target fencing

橡胶在季戊四醇酯基础油中溶胀规律的理论模型

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石油学报（石油加工） 2019年第5期35卷 899-910页

作者：周少鹏梁宇翔尹开吉唐红金中国石化石油化工科学研究院北京100083 中国石化润滑油有限公司北京研究院北京100085

采用季戊四醇分别和不同碳数脂肪酸合成一系列单酸季戊四醇酯,测定5种橡胶在不同单酸季戊四醇酯中的体积变化率,探索可解释和预测橡胶在季戊四醇酯中溶胀趋势的最佳理论模型。结果表明:季戊四醇酯的摩尔体积(V m)和非极性参数(NPI),以... 详细信息

采用季戊四醇分别和不同碳数脂肪酸合成一系列单酸季戊四醇酯,测定5种橡胶在不同单酸季戊四醇酯中的体积变化率,探索可解释和预测橡胶在季戊四醇酯中溶胀趋势的最佳理论模型。结果表明:季戊四醇酯的摩尔体积(V m)和非极性参数(NPI),以及季戊四醇酯与橡胶之间的Hildebrand一维溶解度参数差值(Δδ)和能量差(Ra)在解释和预测季戊四醇酯对橡胶的溶胀规律方面皆具有一定的局限性。提出了抗溶胀参数(ΔA S)可解释和预测季戊四醇酯对5种橡胶的溶胀趋势,以及同碳数正、异构酯对5种橡胶溶胀的差异,弥补和修正了V m、NPI、Δδ和Ra的不足。

关键词：季戊四醇酯橡胶溶胀抗溶胀参数

众脑之力:通过开放神经影像数据和大规模协作催化神经精神疾病的创新发现

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Science Bulletin 2024年第10期69卷 1536-1555页

作者：鲁彬陈骁 Francisco Xavier Castellanos Paul m.Thompson 左西年臧玉峰严超赣 CAS Key Laboratory of Behavioral Science Institute of PsychologyBeijing 100101China Department of Psychology University of Chinese Academy of SciencesBeijing 100101China Department of Child and Adolescent Psychiatry NYU Grossman School of MedicineNew York 10016USA d Nathan Kline Institute for Psychiatric Research Orangeburg 10962USA Imaging Genetics Center Mark&Mary Stevens Institute for Neuroimaging&InformaticsKeck School of MedicineUniversity of Southern CaliforniaLos Angeles 90033USA Developmental Population Neuroscience Research Center IDG/McGovern Institute for Brain ResearchBeijing Normal UniversityBeijing 100875China National Basic Science Data Center Beijing 100190China Centre for Cognition and Brain Disorders The Affiliated Hospital of Hangzhou Normal UniversityHangzhou 310004China Institute of Psychological Science Hangzhou Normal UniversityHangzhou 310030China Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairment Hangzhou 311121China International Big-Data Center for Depression Research Institute of PsychologyChinese Academy of SciencesBeijing 100101China magnetic Resonance Imaging Research Center Institute of PsychologyChinese Academy of SciencesBeijing 100101China

Recent advances in open neuroimaging data are enhancing our comprehension of neuropsychiatric *** pooling images from various cohorts,statistical power has increased,enabling the detection of subtle abnormalities and robust associations,and fostering new research *** collaborations in imaging have furthered our knowledge of the neurobiological foundations of brain disorders and aided in imaging-based prediction for more targeted ***-scale magnetic resonance imaging initiatives are driving innovation in analytics and supporting generalizable psychiatric *** also emphasize the significant role of big data in understanding neural mechanisms and in the early identification and precise treatment of neuropsychiatric ***,challenges such as data harmonization across different sites,privacy protection,and effective data sharing must be *** proper governance and open science practices,we conclude with a projection of how large-scale imaging resources and collaborations could revolutionize diagnosis,treatment selection,and outcome prediction,contributing to optimal brain health.

关键词： magnetic resonance imaging Neuropsychiatric disorders Big data Open science Artificial intelligence

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论中国古籍钤印的分类

文献 2024年第5期 80-109页

作者：莫俊暨南大学图书馆

目前古籍钤印分类研究中存在对钤印概念的内涵和外延理解不准确,对钤印类型的多样化和复杂性认识不充分,对钤印分类依据、方法的规范性和科学性把握不恰当等不足。解决上述不足,可以“古籍钤印”作为顶层概念,在借鉴既有分类成果并占有... 详细信息

目前古籍钤印分类研究中存在对钤印概念的内涵和外延理解不准确,对钤印类型的多样化和复杂性认识不充分,对钤印分类依据、方法的规范性和科学性把握不恰当等不足。解决上述不足,可以“古籍钤印”作为顶层概念,在借鉴既有分类成果并占有更多材料的基础上,以功能为分类依据,将古籍钤印分为出版印、流传印两大类目,分别包含若干下位分类,从语义、语法、语用等角度就类目的概念、印文内容及印文组织形式进行综合剖析,重新构建种类涵盖广泛、类目设计合理、层级关系分明的古籍钤印分类体系,推动新时期古籍钤印整理研究工作的深入。

关键词：古籍钤印分类出版藏书

龙羊峡水库流量变化的地下原因和预测方法探讨

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高原气象 2004年第4期23卷 472-475页

作者：唐红玉汤懋苍赵燕宁青海省气象台青海西宁810001 中国科学院寒区旱区环境与工程研究所甘肃兰州730000

利用3.2m地温资料,从地热涡和地冷涡的演变来分析黄河上游唐乃亥入库流量变化的地下原因,并初步总结了其预测方法。

关键词：流量地热涡预测方法龙羊峡水库

Development of T cell antigen-based human coronavirus vaccinesagainst nAb-escaping SARS-CoV-2 variants

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Science Bulletin 2024年第15期69卷 2456-2470页

作者： Hao Zhou Ping Leng Yang Wang Kaiwen Yang Chen Li David m.Ojcius Pengfei Wang Shibo Jiang College of medical Technology Chengdu University of Traditional Chinese MedicineChengdu 611137China Chongqing Key Laboratory of Sichuan-Chongqing Co-construction for Diagnosis and Treatment of Infectious Diseases Integrated Traditional Chinese and Western medicine Chongqing Traditional Chinese Medicine HospitalChongqing 400016China Shanghai Pudong Hospital Fudan University Pudong Medical CenterShanghai Institute of Infectious Disease and BiosecuritySchool of Life SciencesFudan UniversityShanghai 200438China Department of Biomedical Sciences University of the PaciﬁcArthur Dugoni School of DentistrySan FranciscoCA 94115USA Key Laboratory of medical molecular Virology of ministry of Education/ministry of Health/Chinese Academy of medical Sciences Shanghai Institute of Infectious Disease and BiosecuritySchool of Basic Medical SciencesFudan UniversityShanghai 200032China

Currently approved vaccines have been successful in preventing the severity of COVID-19 and hospitalization. These vaccines primarily induce humoral immune responses;however, highly transmissible and mutated variants, such as the Omicron variant, weaken the neutralization potential of the vaccines, thus,raising serious concerns about their efficacy. Additionally, while neutralizing antibodies(nAbs) tend to wane more rapidly than cell-mediated immunity, long-lasting T cells typically prevent severe viral illness by directly killing infected cells or aiding other immune cells. Importantly, T cells are more cross-reactive than antibodies, thus, highly mutated variants are less likely to escape lasting broadly cross-reactive T cell immunity. Therefore, T cell antigen-based human coronavirus(HCoV) vaccines with the potential to serve as a supplementary weapon to combat emerging SARS-CoV-2 variants with resistance to n Abs are urgently needed. Alternatively, T cell antigens could also be included in B cell antigen-based vaccines to strengthen vaccine efficacy. This review summarizes recent advancements in research and development of vaccines containing T cell antigens or both T and B cell antigens derived from proteins of SARS-CoV-2 variants and/or other HCo Vs based on different vaccine platforms.

关键词： COVID-19 Immune escape Omicron variant SARS-CoV-2 T cell antigen-based vaccine

粉末冶金Al-5.6Zn-2mg合金在热压缩过程中加工硬化特性及本构模型的比较

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Journal of Central South University 2024年第2期31卷 346-368页

作者： KATIKA Harikrishna DAmODA R.K. DAVIDSON m.J. SEETHARAm R. KASAGANI Veera Venkata Nagaraju Department of mechanical Engineering National Institute of TechnologyWarangal 506004India Department of mechanical Engineering The Indian Institute of Information Technology Design and ManufacturingKurnool 518007India

在300~5000℃、应变速率为0.1~0.0001 s−1的条件下,在万能试验机上对Al-5.6Zn-2mg铝合金进行热压缩试验,以确定动态再结晶开始时的加工硬化速率曲线σ_(c)(ε_(c))l以及关键特征σ_(c)(ε_(c))l、σ_(p)(ε_(p))和σ_(ss)与Z系数之间的... 详细信息

在300~5000℃、应变速率为0.1~0.0001 s−1的条件下,在万能试验机上对Al-5.6Zn-2mg铝合金进行热压缩试验,以确定动态再结晶开始时的加工硬化速率曲线σ_(c)(ε_(c))l以及关键特征σ_(c)(ε_(c))l、σ_(p)(ε_(p))和σ_(ss)与Z系数之间的相关性。使用了四个本构模型,Arrhenius模型、改进的Johnson-Cook模型(mJC)、改进的Zerilli-Armstrong模型(mZA)和开发的人工神经网络(ANN)。结果表明,ANN型模型和Arrhenius模型的相对误差的绝对平均值最低,分别为0.486%和3.36%,mZA型模型和mJC型模型的相对误差的绝对平均值较高,分别为8.84%和3.93%。由于Arrhenius模型能够处理各种因素之间的非线性关系,因此它被认为是最合适的预测模型,但在材料性质未知或实验数据有限的情况下,mJC模型可能是一种更简单的替代方法。mZA模型不适合估计热压缩时的流变应力。此外,训练最好的神经网络模型的预测性能最好,相对误差的绝对平均值为0.486%,R值为0.99。

关键词：加工硬化速率曲线本构建模热压缩 EBSD分析流变曲线

multivariate form of Hermite sampling series

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Applied mathematics(A Journal of Chinese Universities) 2024年第2期39卷 253-265页

作者： Rashad m.Asharabi Department of mathematics College of Arts and SciencesNajran UniversityNajranSaudi Arabia

In this paper,we establish a new multivariate Hermite sampling series involving samples from the function itself and its mixed and non-mixed partial derivatives of arbitrary *** multivariate form of Hermite sampling will be valid for some classes of multivariate entire functions,satisfying certain growth *** will show that many known results included in Commun Korean math Soc,2002,17:731-740,Turk J math,2017,41:387-403 and Filomat,2020,34:3339-3347 are special cases of our ***,we estimate the truncation error of this sampling based on localized sampling without decay *** examples are also presented.

关键词： multidimensional sampling series sampling with partial derivatives contour integral truncation error