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Nuclear Science and Techniques 2019年第2期30卷 135-141页

作者： Hakan ?ztürk ?kke? Ege Department of Physics Faculty of Arts and SciencesOsmaniye Korkut Ata University

The critical size of a finite homogenous slab is investigated for one-speed neutrons using the alternative phase function(AG, Anli-Gungor) in place of the scattering function of the transport equation. First of all, the neutron angular flux expanded in terms of the Chebyshev polynomials of second kind(UN approximation) together with the AG phase function is applied to the transport equation to obtain a criticality condition for the ***, using various values of the scattering parameters, the numerical results for the critical half-thickness of the slab are calculated and they are tabulated in the tables together with the ones obtained from the conventional spherical harmonic(PN) method for comparison. They can be said to be in good accordance with each other.

关键词： Criticality problem UN method Neutron transport equation Alternative phase function

Evaluation of Operating Room Noise by Different Medical Specialists

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Journal of Environmental Protection 2023年第12期14卷 1016-1024页

作者： Ezgi Erkiliç Yasemin Akçaalan Ayça Dumanli Özcan Yusuf Furkan Güneş Levent Öztürk Tülin Gümüş Orhan Kanbak Anesthesiology and Reanimation Department Ataturk City Hospital Ankara T&uumlrkiye

Noise pollution is in an increasing trend in the operating rooms, as has been the case in various other domains in life. It has been shown in studies that the main cause of this noise pollution consist of the behavior related to the operating room personel and the surgical equipment. These higher than normal noise levels may increase stress and decrease communication and performance, apart from the negative health effects on the operating team. In this study, we aimed to explore the sources of noise pollution and the place of music on these effects on anesthesiology and surgical doctors. Questions formulated through a questionnaire have been asked to the anesthesiology and surgical department physicians on a voluntary basis, and their approach to the concept of noise has been assessed. The study was planned as a descriptive study. In total, highest impact from noise pollution was found to be the aspirator (74.3%), chatting (55.4%), noises from the monitors (54.8%), alarms (48.6%), surgical material (25.9%) and music (23.8%). Noise had the most impact on the concentration of the doctors with a rate of 61.9%. Anesthesiologists, when compared to other surgical department physicians, were found to be impacted most by music with 37.2%. It is not realistic to eliminate all the noise and distraction. On the other hand, it can be minimalized through sufficient measures. Yet, general measures to keep the silence isn’t too likely to keep the noise down during long operations. Whereas music stays as a matter of personal choice. Controlled studies on whether to keep or not the music in the operating rooms aren’t yet sufficient, due to which, general recommendations do not apply. As a result of this study, we have found that while music might have performance increasing effects, it still has a potential as a distraction and interfere with the communication in the operating room.

关键词： Operating Room Noise Music

Why do platinum catalysts show diverse electrocatalytic performance?

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Fundamental Research 2023年第5期3卷 804-808页

作者： Qiangmin Yu Zhiyuan Zhang Heming Liu Xin kang Shiyu Ge Shaohai Li Lin Gan Bilu Liu Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen Institute&Institute of Materials ResearchShenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

As one of the best electrocatalysts for the hydrogen evolution reaction,platinum catalysts are a benchmark for the performance evaluation of new ***,platinum catalysts reported in the literature show diverse electrocatalytic performances,resulting in the lack of a common reference *** this study,we investigated several factors that affect the performance of platinum catalysts by performing experimental measurements and data *** factors included the solution resistance,electrolyte temperature,loading quantity,catalyst microstructure,and normalization method of the current ***,we recommended criteria for the performance evaluation of electrocatalysts.

关键词： Platinum Electrocatalyst Overpotential Solution resistance Loading quantity Microstructure Catalyst area Evaluation criteria

Neutron diffraction for revealing the structures and ionic transport mechanisms of antiperovskite solid electrolytes

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Chinese Journal of Structural Chemistry 2023年第5期42卷 56-64页

作者： Lei Gao Jiangyang Pan Longbang Di Jinlong Zhu Liping Wang Song Gao Ruqiang Zou Le kang Songbai Han Yusheng Zhao School of Materials Science and Engineering Peking UniversityyBeijing100871China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen518055China Department of Physics Southern University of Science and TechnologyShenzhen518055China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing100049China Dongguan Neutron Science Center Dongguan523803China

Solid-state electrolytes(SSEs)play the most important role in the development of cutting-edge all-solid-state bat-teries(ASSBs).The lithium(sodium)-rich antiperovskite solid conductors have been considered as the promising SSEs due to the structural tolerance for lattice manipulation and the potential to improve ionic *** particular,lithium(sodium)-rich antiperovskite SSEs are mainly composed of light elements(e.g.,Li,O,H),which are suitable for studying the structure and ionic transport mechanism through neutron diffraction *** present review summarizes the progress of neutron diffraction in analyzing the structure and revealing the ionic transport mechanisms of antiperovskite *** structure-function relationships involved in ionic transport pathways,defect chemistry,anion disorder and lattice dynamics are introduced *** addition,the possible future directions for the application of neutron diffraction in antiperovskite SSEs are suggested.

关键词： Solid-state electrolytes Antiperovskite Neutron diffraction Structure

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理工大风流往事

职业技术教育 2003年第35期24卷 47-49页

作者： zt 子晓

大哥把我送到了学校，看到穿着红马甲的学长们把我安顿得好好的，就去逛南京了，留下我一个人在宿舍。当时屋里还有一个皮肤白哲的高个子，长得也算对得起观众，正在跟一个卖衣架小贩为了两毛钱讨价还价。稍后我知道了他叫高进，河南人... 详细信息

大哥把我送到了学校，看到穿着红马甲的学长们把我安顿得好好的，就去逛南京了，留下我一个人在宿舍。当时屋里还有一个皮肤白哲的高个子，长得也算对得起观众，正在跟一个卖衣架小贩为了两毛钱讨价还价。稍后我知道了他叫高进，河南人，他爸是河南一个县级市的城建局局长，他妈是医生，他说他家住一栋三层小楼，三楼睡觉，二楼吃饭，一楼养猪。

关键词：中国网络文学小说《理工大风流往事》大学生活

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理工大往事外传

作者： zt

来源：南通市图书馆图书评论

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连续管技术与装备在深层页岩气开发中的浅析

世界石油工业 2024年第1期31卷 61-69页

作者：柳庆仁张富强吕维平卢秀德郝军殷卓成康凯中石油江汉机械研究所有限公司湖北武汉430024 中国石油天然气集团川庆钻探工程有限公司井下作业公司四川成都610066

为了促进深层页岩气连续管技术进步,提高连续管装备在深层页岩气井的作业能力和安全水平,总结深层页岩气连续管作业技术与装备发展现状,调研深层页岩气连续管作业技术与装备面临的挑战;分析深层页岩气连续管作业技术与装备的发展需求,... 详细信息

为了促进深层页岩气连续管技术进步,提高连续管装备在深层页岩气井的作业能力和安全水平,总结深层页岩气连续管作业技术与装备发展现状,调研深层页岩气连续管作业技术与装备面临的挑战;分析深层页岩气连续管作业技术与装备的发展需求,总结深层页岩气连续管作业技术与装备研究难点。基于此,提出了深层页岩气连续管作业技术与装备发展方向和研究建议,即配备大管径、超长下深能力连续管作业装备,推进延长下深技术发展,持续提升作业安全性,加强数字化连油建设及发挥辅助配套的作用等。同时提出了大管径、超长下深能力连续管作业装备的结构形式和现场作业流程,大管径、大容量滚筒的结构和作业模式,延长下深新作法、提升连续管作业安全性的具体措施和辅助配套的用法和配套要求,对深层页岩气连续管作业具有很强的指导意义。未来连续管应用需适应深层超深层、超长水平段、套管变形井等复杂井作业需求,是深层页岩气连续管作业技术与装备发展及现场应用的主要方向。

关键词：深层页岩气连续管作业技术与装备大管径油气开发发展建议

工艺参数和轮子表面形态对熔融纺丝6060铝合金粉末及带材生产的影响

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Transactions of Nonferrous Metals Society of China 2020年第5期30卷 1169-1182页

作者： SultanÖztÜRK Sefa Emre SÜNBÜL KürşatİCİN Department of Metallurgical and Materials Engineering Karadeniz Technical UniversityTrabzonTurkey Department of Metallurgical and Materials Engineering Gaziantep UniversityGaziantepTurkey

研究不同熔融纺丝轮表面形态,即光滑表面和齿轮结构表面,对液态金属雾化成粉末的影响。研究熔融纺丝过程中轮子转速、气体喷射压力、熔融金属温度、喷嘴-轮子间距等工艺参数和轮子表面形态对6060铝合金粉末及带材的形貌和显微组织特征... 详细信息

研究不同熔融纺丝轮表面形态,即光滑表面和齿轮结构表面,对液态金属雾化成粉末的影响。研究熔融纺丝过程中轮子转速、气体喷射压力、熔融金属温度、喷嘴-轮子间距等工艺参数和轮子表面形态对6060铝合金粉末及带材的形貌和显微组织特征的影响。结果表明,用光滑轮可得到带状材料,用齿轮可得到粉体。随着工艺参数的变化,用光滑齿轮生产的带材厚度为30~170μm,宽度为4~8 mm;用齿轮生产的粉末平均粒径为161~274μm。提高轮子转速和熔体温度、降低气体喷射压力和喷嘴与砂轮间距导致带材厚度和粉末粒径减小。粉末和带材的显微组织为等轴晶,且平均晶粒尺寸随着带材厚度和粉末粒径的减小而减小。在最大冷却速率为2.00×10^5和1.26×10^4 K/s条件下可分别得到厚度为30μm的带材和粒径为87μm的粉末。

关键词：熔融纺丝 6060铝合金工艺参数齿轮

Carbonatites and Alkaline Igneous Rocks in Post-Collisional Settings:Storehouses of Rare Earth Elements

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Journal of Earth Science 2021年第6期32卷 1332-1358页

作者： Kathryn M.Goodenough Eimear A.Deady Charles D.Beard Sam Broom-Fendley Holly ALElliott Frederick van den Berg HüseyinÖztürk British Geological Survey the Lyell CentreEdinburgh EH144APUK Institut des Sciences de la Terre UniversitéGrenoble Alpes38610 GièresFrance Camborne School of Mines University of ExeterPenryn CampusPenryn TR109FEUK School of Environmental Sciences University of DerbyDerbyUK Department of Geological Engineering Istanbul University-CerrahpaşaAvcılar Campus34320 Avcılar IstanbulTurkey

The rare earth elements(REE)are critical raw materials for much of modern technology,particularly renewable energy infrastructure and electric vehicles that are vital for the energy *** of the world's largest REE deposits occur in alkaline rocks and carbonatites,which are found in intracontinental,rift-related settings,and also in syn-to post-collisional ***-collisional settings host significant REE deposits,such as those of the Mianning-Dechang belt in *** paper reviews REE mineralization in syn-to post-collisional alkaline-carbonatite complexes worldwide,in order to demonstrate some of the key physical and chemical features of these *** use three examples,in Scotland,Namibia,and Turkey,to illustrate the structure of these *** review published geochemical data and use these to build up a broad model for the REE mineral system in post-collisional alkaline-carbonatite *** is evident that immiscibility of carbonate-rich magmas and fluids plays an important part in generating mineralization in these settings,with REE,Ba and F partitioning into the carbonate-rich *** most significant REE mineralization in post-collisional alkaline-carbonatite complexes occurs in shallow-level,carbothermal or carbonatite intrusions,but deeper carbonatite bodies and associated alteration zones may also have REE enrichment.

关键词： post-collisional alkaline carbonatite rare earth elements tectonics carbon cycle

Unraveling the stabilization mechanism of solid electrolyte interface on ZnSe by rGO in sodium ion battery

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Journal of Energy Chemistry 2021年第3期30卷 124-130页

作者： Shuang Men Hui Zheng Dejun Ma Xiaolian Huang Xiongwu kang School of Environment and Energy South China University of TechnologyGuangzhou 510006GuangdongChina Department of Chemical Engineering Northwest UniversityXi'an 710069ShaanxiChina School ofPhamacy Guangdong Pharmaceutical UniversityGuangzhou 510006GuangdongChina College of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006GuangdongChina

Transition metal selenides have been widely studied as anode materials of sodium ion batteries(SIBs),however,the investigation of solid-electrolyte-interface(SEI)on these materials,which is critical to the electrochemical performance of SIBs,remains at its *** in this paper,ZnSe@C nanoparticles were prepared from ZIF-8 and the SEI layers on these electrodes with and without reduced graphene oxide(rGO)layers were examined in details by X-ray photoelectron spectroscopies at varied charged/discharged *** is observed that fast and complicated electrolyte decomposition reactions on ZnSe@C leads to quite thick SEI film and intercalation of solvated sodium ions through such thick SEI film results in slow ion diffusion kinetics and unstable electrode ***,the presence of rGO could efficiently suppress the decomposition of electrolyte,thus thin and stable SEI film was ***@C electrodes wrapped by rGO demonstrates enhanced interfacial charge transfer kinetics and high electrochemical performance,a capacity retention of 96.4%,after 1000 cycles at 5 A/*** study might offer a simple avenue for the designing high performance anode materials through manipulation of SEI film.

关键词： ZIF-8 Zinc selenide Transition metal selenide Reduced graphene oxide XPS Solid electrolyte interface Sodium ion batteries