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Friction 2024年第2期12卷 340-355页

作者： Valentin l.POPOV Qiang lI Emanuel WIllERt Institute of Mechanics Technische Universität BerlinBerlin 10623Germany

In two recent papers,approximate solutions for compact non-axisymmetric contact problems of homogeneous and power-law graded elastic bodies have been suggested,which provide explicit analytical relations for the force–approach relation,the size and the shape of the contact area,as well as for the pressure distribution *** solutions were derived for profiles,which only slightly deviate from the axisymmetric *** the present paper,they undergo an extensive testing and validation by comparison of solutions with a great variety of profile shapes with numerical solutions obtained by the fast Fourier transform(FFt)-assisted boundary element method(BEM).Examples are given with quite significant deviations from axial symmetry and show surprisingly good agreement with numerical solutions.

关键词： normal contact non-axisymmetric indenter extremal principle generalized method of dimensionality reduction(MDR) functional elastic grading

稠油油藏SAGD开发后腔体储氢潜力数值模拟

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天然气工业 2024年第8期44卷 178-190页

作者：于春生彭良儒蒋琪蒲万芬蒲军吴芳杰西南石油大学石油与天然气工程学院天府永兴实验室中国石化石油勘探开发研究院

氢气作为一种清洁能源有望替代化石燃料成为主要能源载体,地下储氢是实现氢气大容量长期存储的有效途径,是近年来新兴研究领域。为此,在目前盐穴、枯竭油气藏及含水层3种传统地下储氢地质体外,探索了一种新的储氢方法,即利用稠油油藏蒸... 详细信息

氢气作为一种清洁能源有望替代化石燃料成为主要能源载体,地下储氢是实现氢气大容量长期存储的有效途径,是近年来新兴研究领域。为此,在目前盐穴、枯竭油气藏及含水层3种传统地下储氢地质体外,探索了一种新的储氢方法,即利用稠油油藏蒸汽辅助重力泄油(SAGD)后形成的腔体进行储氢。首先对比了稠油油藏SAGD开发后储层储氢与常规地层储氢的优缺点,进而采用数值模拟方法对其建立地下储氢库的可能性进行论证,最后明确了不同注采方案的氢气储量及回收率,揭示了储层注采氢气阶段氢气与地层原有气体的流动特征。研究结果表明:①相较于常规枯竭油气藏储氢库,利用稠油油藏SAGD开发后的枯竭腔储氢具有储气量大、氢—油过渡带导致的氢损更低、无需注入或仅需注入少量的垫气、可降低氢脆风险、可提前监测闭圈盖层稳定性及气体密封性等优点;②典型单井组SAGD开发后的枯竭腔可储存约490 t氢气,回收率约为90%,且随着注采周期增多,采出的氢气纯度越高,第4个采氢周期后氢气采出纯度高达99%;③氢气存储方式的差异会导致甲烷在枯竭腔中的聚集位置发生变化,长期存储方式在氢气注入结束后,甲烷主要聚集在枯竭腔的底部,而短期存储方式下甲烷只会被氢气挤压到枯竭腔顶部的左右两侧,导致产氢过程中甲烷的产出规律不同。结论认为,利用稠油油藏SAGD开发后的储层进行高纯氢气的储存在储氢量、氢气回采纯度和建库成本方面都具有显著优势,是一种解决大规模储氢的高经济效益储氢技术,该研究成果能够为中国地下储氢技术的选址和建设运行提供指导和参考。

关键词：稠油油藏 SAGD 地下储氢库大规模储氢数值模拟甲烷产出氢气回收率多轮注采

Promoting Older Adults' Engagement in Disaster Recovery through Supportive Relationships, Partnerships, and Collaboration: Perspectives of Social Work Practitioners and Human Service Professionals

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International Journal of Disaster Risk Science 2024年第2期15卷 265-276页

作者： Julie l.Drolet Mahed Choudhury Faculty of Social Work University of CalgaryEdmontonAB T5J 4P6Canada

Shifting demographics—that is, the growing number of older adults in Canada and internationally—and intersecting climatic risks create a complex landscape of aging in place in disaster contexts. Some older adults are vulnerable due to their underlying health conditions and limited physical mobility. Yet they also exhibit resilience in a distinct manner, owing to their wealth of knowledge, wisdom, and ability to navigate adversities. this article elucidates potential avenues for promoting the involvement of older adults in disaster recovery efforts. Our intention is to recognize and foster older adult resilience and mitigate vulnerability by drawing upon insights from the study titled “In the Aftermath of the 2016 Alberta Wildfires: the Role of Social Work Practitioners and Human Service Professionals in long-term Disaster Recovery.” Employing a qualitative research approach, that study recruited 51 participants for semistructured interviews and focus groups. A thematic analysis of the collected data unveiled the pivotal roles played by social workers and human service practitioners in facilitating recovery from the 2016 wildfires in the research. Notably, three overarching themes emerged concerning the promotion of older adults' involvement in disaster recovery: fostering supportive relationships, building partnerships and enhancing collaboration, and addressing ongoing challenges. these findings offer valuable insights into how social work practitioners and human service professionals can effectively facilitate the engagement of older adults in disaster recovery initiatives. this article emphasizes the significance of actively promoting the participation of older adults in disaster mitigation efforts, thereby fostering greater resilience within communities.

关键词： Alberta wildfires Canada Disaster recovery Older adults Partnerships and collaboration Social work

人ZRANB3蛋白在大肠埃希菌中的表达纯化和功能研究

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中国病原生物学杂志 2024年第9期19卷 1031-1035,1041页

作者：郑琳向嵩陈朴天津医科大学基础医学院生物化学与分子生物学系天津300070

目的人体细胞中,ZRANB3蛋白在DNA损伤应对通路中发挥重要功能。目前,对ZRANB3的结构及其发挥功能的机制还了解甚少。为开展对ZRANB3蛋白结构和功能的研究,急需一种大规模制备高纯度、折叠正确ZRANB3的方法。ZRANB3是大分子量、多结构域... 详细信息

目的人体细胞中,ZRANB3蛋白在DNA损伤应对通路中发挥重要功能。目前,对ZRANB3的结构及其发挥功能的机制还了解甚少。为开展对ZRANB3蛋白结构和功能的研究,急需一种大规模制备高纯度、折叠正确ZRANB3的方法。ZRANB3是大分子量、多结构域的人源蛋白,这类蛋白的表达和纯化一般较为困难。本研究的目的是建立一种高效的ZRANB3的表达和纯化方法。方法通过基因克隆技术将经过密码子优化的ZRANB3基因插入到pEt.28a载体中,构建重组质粒;将重组质粒转化至大肠埃希菌Rosetta菌株中,用IPtG诱导ZRANB3表达;采用亲和层析、离子交换层析和凝胶过滤层析等多种层析手段纯化ZRANB3并通过SDS-PAGE鉴定目的蛋白的纯度。通过核酸内切酶实验和复制叉退行实验对重组蛋白ZRANB3的功能进行验证。结果本研究建立了从大肠埃希菌中制备人源ZRANB3的方案,有效地纯化了ZRANB3蛋白,获得了较大量高纯度的ZRANB3蛋白,并且通过体外功能实验证明了制备的人源重组蛋白ZRANB3具有被报导的生化活性,包括AtP依赖的核酸内切酶活性和催化复制叉退行的活性。通过本研究建立的方法,可从9l的大肠埃希菌培养液中制备约0.5 mg纯度大于95%的、具有生化活性的ZRANB3蛋白。结论本研究提供了一种高效制备大量、高纯度且具有酶活性的人源ZRANB3蛋白的方法,为深入理解其促进复制叉重启的功能提供了线索,并为ZRANB3结构和功能的进一步研究奠定了基础。

关键词： ZRANB3 表达纯化 DNA损伤修复复制叉退行核酸内切酶

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托尼·雷恩与中国电影“新浪潮”的国际化

电影评介 2024年第6期 14-20页

作者：张华蒲琪凌西南大学新闻传媒学院

1983年,上海南京西路街头。一个戴着黑框眼镜、身着白色t恤的年轻人站在大光明电影院对面,饶有兴趣地观察着眼前的车水马龙。他的西方面孔在彼时的上海街头显得格格不入。这位年轻人架好随身携带的录像设备,朝向“大光明”拍摄起来。

关键词：录像设备南京西路大光明电影院新浪潮黑框眼镜国际化街头

Fruit Powder of tetrapleura tetraptera in local Feed on Some Zootechnical Performances of Juveniles of Clarias gariepinus in Concrete tank

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Open Journal of Animal Sciences 2024年第2期14卷 56-69页

作者： Ngouana tadjong Ruben Abdoulaye Abdoulaye Kana Jean Raphaël téguia Alexis laboratory of Aquaculture and Demography of Fisheries Resources Aquaculture Department Institute of Fisheries and Aquatic Science of Yabassi University of Douala Douala Cameroon laboratory of Animal Nutrition Department of Animal Science Faculty of Agronomy and Agricultural Sciences University of Dschang Dschang Cameroon

this study focused on the supplementation of four-sided spice fruit powder (tetrapleura tetraptera) on some zootechnical performances of juveniles of Clarias gariepinus and was carried out from February 14 to July 20 at the Massoma Fish Farm of Bojongo Mbeidi located in the littoral Region, Department of Wouri, Douala IV district. the farm benefits from a climate favorable to aquaculture activity. For this purpose, five (5) treatments were tested including t0+ (imported feed), t0-, t0.3, t0.4, and t0.5 respectively for the treatments with 0% supplemented food;0.3%;0.4% and 0.5% of tetrapleura tetraptera powder. A total of 450 Clarias gariepinus fry with an initial average weight of 7 ± 1.5 g, were distributed in happas of 0.49 m2 each placed in triplicate in a completely randomized device. Four isoprotein foods with 38% crude protein were formulated to feed these fry at 7% of their biomass per day for 15 days then to their fullness until the end of the experiment. Intermediate fishing was carried out every fortnight. 75 days later, the results recorded show that the highest average survival rate (96.44% ± 3.5%) was recorded with the subjects fed feed supplemented with 0.4% t. tetraptera powder. the average weight (120.93 ± 67.20), weight gain (113.93 ± 67.20), specific growth rate (3.64 ± 0.79% g/d) and total lengths and standard (26.43 ± 1.9 and 23.66 ± 1.76) the highest were recorded with the t0+ treatment (imported feed). the highest conditioning factor K (2.14 ± 0.15) was recorded with the treatment supplemented with 0.4% t. tetraptera. the lowest conversion ratio (1.28) was recorded with the treatment fed with imported blue crown food (t0+). Furthermore, the lowest production cost was recorded with the treatment supplemented with 0.4% t. tetraptera. It appears from this study that the juveniles of C. gariepinus better value the feed substituted with 0.4% of the powder of fou

关键词： tetrapleura tetraptera local Feed Zootechnical Performance Juvenile of Clarias gariepinus

强奇异积分算子与Campanato函数生成的交换子

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数学进展 2024年第2期53卷 310-320页

作者：朱晓矇张璞牡丹江师范学院数学科学学院黑龙江牡丹江157011

设t为强奇异积分算子.t与函数b生成的交换子由tbf=bt(f)-t(bf)给出.当b属于某些Campanato空间时,本文给出了交换子tb从Morrey空间到Campanato空间有界的充分条件.

关键词：强奇异积分算子交换子 Campanato空间 Morrey空间

Impact of device resistances in the performance of graphene‑based terahertz photodetectors

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Frontiers of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Castelló Sofía M.lópez Baptista K.Watanabe t.taniguchi E.Diez J.E.Velázquez-Pérez Y.M.Meziani J.M.Caridad J.A.Delgado-Notario Department of Applied Physics University of Salamanca37008 SalamancaSpain Unidad de Excelencia en luz y Materia Estructurada(lUMES) University of Salamanca37008 SalamancaSpain Research Center for Electronic and Optical Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Nanotechnology Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent years,graphene field-effect-transistors(GFEts)have demonstrated an outstanding potential for terahertz(tHz)photodetection due to their fast response and *** features are essential to enable emerging tHz applications,including 6G wireless communications,quantum information,bioimaging and ***,the overall performance of these photodetectors may be utterly compromised by the impact of internal resistances presented in the device,so-called access or parasitic *** this work,we provide a detailed study of the influence of internal device resistances in the photoresponse of high-mobility dual-gate GFEt *** dual-gate architectures allow us to fine tune(decrease)the internal resistance of the device by an order of magnitude and consequently demonstrate an improved responsivity and noise-equivalent-power values of the photodetector,*** results can be well understood by a series resistance model,as shown by the excellent agreement found between the experimental data and theoretical *** findings are therefore relevant to understand and improve the overall performance of existing high-mobility graphene photodetectors.

关键词： Graphene tHz Photodetector Field-effect transistor Plasmonic

Extracellular Disintegration of Viral Proteins as an Innovative Strategy for Developing Broad-Spectrum Antivirals Against Coronavirus

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CCS Chemistry 2024年第2期6卷 487-496页

作者： Ke Sun Zhe Ding Xiaoying Jia Haonan Cheng Yingwen li Yan Wu Zhuoyu li Xiaohua Huang Fangxu pu Entao li Guiyou Wang Wei Wang Yun Ding Gary Wong Sandra Chiu Jiaming lan Aiguo Hu Shanghai Key laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237 CAS Key laboratory of Molecular Virology&Immunology Chinese Academy of SciencesShanghai 200031 University of the Chinese Academy of Sciences Beijing 100049 State Key laboratory of Virology Center for Biosafety Mega-ScienceWuhan Institute of VirologyChinese Academy of SciencesWuhan 430071 Division of life Sciences and Medicine University of Science and Technology of ChinaHefeiAnhui 230027 Department of Clinical laboratory The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui 230001

the coronavirus disease 2019(COVID-19)pandemic,caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),has claimedmillions of lives and caused innumerable economic losses ***,state-of-the-art treatments still lag behind the continual emergence of new *** to resolving this issue is developing antivirals to deactivate coronaviruses regardless of their structural ***,we report an innovative antiviral strategy involving extracellular disintegration of viral proteins with hyperanion-grafted enediyne(EDY)*** core EDY generates reactive radical species and causes significant damage to the spike protein of coronavirus,while the hyperanion groups ensure negligible cytotoxicity of the *** EDYs exhibit antiviral activity down to nanomolar concentrations,and the selectivity index of up to 20,000 against four kinds of human coronavirus,including the SARS-CoV-2 Omicron variant,suggesting the high potential of this new strategy in combating the COVID-19 pandemic and a future“disease X.”

关键词： enediyne broad spectrum antiviral protein disintegration coronavirus polyanions

基于粒子群算法的复杂山区铁路土方调配与取弃土场选址协同优化

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铁道科学与工程学报 2024年第3期21卷 1202-1212页

作者：吕春妍蒲浩宋陶然李伟彭利辉钟晶徐占军中南大学土木工程学院湖南长沙410075 高速铁路建造技术国家工程研究中心湖南长沙410075 中国中铁股份有限公司北京100039 中铁第四勘察设计院集团有限公司湖北武汉430063 湖南中大设计院有限公司湖南长沙410018

复杂山区铁路线路土方调配及取弃土场选址对铁路项目的成本、工期、安全性、环境影响程度等产生长久深远影响,二者之间存在着复杂关联耦合关系。然而,既有方法忽略了上述联系,难以实现铁路线路土方调配与取弃土场选址协同优化。对于复... 详细信息

复杂山区铁路线路土方调配及取弃土场选址对铁路项目的成本、工期、安全性、环境影响程度等产生长久深远影响,二者之间存在着复杂关联耦合关系。然而,既有方法忽略了上述联系,难以实现铁路线路土方调配与取弃土场选址协同优化。对于复杂山区铁路线路,构建了融合调配段落划分点、土方调配量、取弃土场的统一自变量集合,考虑了土方调配、取弃土场选址复杂约束,以土方调配成本、取弃土场建设成本及便道建设成本的综合费用为目标函数,集成综合基础信息子系统、土方调配优化子系统与取弃土场选址优化子系统,建立了土方调配与取弃土场选址的协同优化模型。为求解此协同优化模型,提出一种基于粒子群算法的累进求解策略。首先根据线路划分土方调配段落,进入土方调配优化子系统求得土方调配解,借助移动窗口法构建取弃土场备选池,进入取弃土场选址优化子系统求得取弃土场址解;其次,基于粒子群算法通过更新线路土方调配段落划分来累进迭代寻求最优解。以某复杂山区铁路为例,对铁路线路土方调配及取弃土场选址协同优化模型进行案例验证,与人工方案相比,最终机选最优方案可节省13.77%的综合费用。测试结果表明本方法的有效性,可提高铁路土方调配与取弃土场选址求解效率,为设计人员提供参考。

关键词：铁路线路土方调配取弃土场选址协同优化累进求解算法