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Effects of interstitial cluster mobility on dislocation loops evolution under irradiation of austenitic steel

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Nuclear Science and Techniques 2024年第8期35卷 69-78页

作者： Xin‑Hua Yan Lu Sun Du Zhou Teng Xie Chang Peng Ye‑Xin Yang Li Chen zhen‑Feng tong North China Electric Power University Beijing 102206China China Nuclear Power Operations Co. LtdShenzhen 518000China

The evolution of dislocation loops in austenitic steels irradiated with Fe~+is investigated using cluster dynamics(CD)simulations by developing a CD *** CD predictions are compared with experimental results in the *** number density and average diameter of the dislocation loops obtained from the CD simulations are in good agreement with the experimental data obtained from transmission electron microscopy(TEM)observations of Fe~+-irradiated Solution Annealed 304,Cold Worked 316,and HR3 austenitic steels in the *** CD simulation results demonstrate that the diffusion of in-cascade interstitial clusters plays a major role in the dislocation loop density and dislocation loop growth;in particular,for the HR3 austenitic steel,the CD model has verified the effect of temperature on the density and size of the dislocation loops.

关键词： Cluster dynamics Dislocation loops In-cascade interstitial clusters Austenitic steels

Systematic Cloud-Based Optimization: Twin-Fold Moth Flame Algorithm for VM Deployment and Load-Balancing

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Intelligent Automation & Soft Computing 2024年第3期39卷 477-510页

作者： Umer Nauman Yuhong Zhang Zhihui Li tong zhen Information Science and Engineering College Henan University of TechnologyZhengzhou450001China School of Artificial Intelligence and Big Data Henan University of TechnologyZhengzhou450001China Key Laboratory of Grain Information Processing and Control Ministry of EducationHenan University of TechnologyZhengzhou450001China

Cloud computing has gained significant recognition due to its ability to provide a broad range of online services and ***,existing commercial cloud computing models demonstrate an appropriate design by concentrating computational assets,such as preservation and server infrastructure,in a limited number of large-scale worldwide data *** the deployment of virtual machines(VMs)is crucial in this scenario to ensure system dependability,performance,and minimal latency.A significant barrier in the present scenario is the load distribution,particularly when striving for improved energy consumption in a hypothetical grid computing *** design employs load-balancing techniques to allocate different user workloads across several virtual *** address this challenge,we propose using the twin-fold moth flame technique,which serves as a very effective optimization *** intentionally designed the twin-fold moth flame method to consider various restrictions,including energy efficiency,lifespan analysis,and resource *** provides a thorough approach to evaluating total costs in the cloud computing *** assessing the efficacy of our suggested strategy,the study will analyze significant metrics such as energy efficiency,lifespan analysis,and resource *** investigation aims to enhance cloud computing techniques by developing a new optimization algorithm that considers multiple factors for effective virtual machine placement and load *** proposed work demonstrates notable improvements of 12.15%,10.68%,8.70%,13.29%,18.46%,and 33.39%for 40 count data of nodes using the artificial bee colony-bat algorithm,ant colony optimization,crow search algorithm,krill herd,whale optimization genetic algorithm,and improved Lévy-based whale optimization algorithm,respectively.

关键词： Optimizing cloud computing deployment of virtual machines load-balancing twin-fold moth flame algorithm grid computing computational resource distribution data virtualization

论米兰·昆德拉小说中“存在密码”的诗性形式——以《不能承受的生命之轻》为例

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湘潭大学学报（哲学社会科学版） 2024年第4期48卷 148-152页

作者：童真徐佳宁湘潭大学文学与新闻学院湖南湘潭411105

“存在密码”诗性形式的背后是米兰·昆德拉为“哲理诗化”开创的一套隐含了其价值观和方法论的小说诗学体系。其中包含对小说运思原则的强调:一是小说中的哲学思考应当具有不确定性,呈现为思索过程的价值;二是小说中的哲学思考应当具... 详细信息

“存在密码”诗性形式的背后是米兰·昆德拉为“哲理诗化”开创的一套隐含了其价值观和方法论的小说诗学体系。其中包含对小说运思原则的强调:一是小说中的哲学思考应当具有不确定性,呈现为思索过程的价值;二是小说中的哲学思考应当具有情境性,表现为“具体的形而上学”;三是小说中的哲学思考在小说史上应当具有实现“发现的延续”的价值。此外,这套体系还包含了昆德拉将上述运思原则运用至小说创作实践的方法即“存在密码”的种种诗性形式,包括从“存在密码”的雏形、命名再到修正的整个过程。

关键词：昆德拉存在密码诗性形式

绝热段阻力对CO_(2)、R134a和R410A分离式热管传热性能的影响

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制冷学报 2024年第4期45卷 28-35页

作者：佟振文欣然韩泽坤房春雪宋玉龙青岛理工大学环境与市政工程学院青岛266033

通过实验研究了上升管和下降管阻力对CO_(2)、R134a和R410A分离式热管传热性能的影响,分析了热管传热极限和传热热阻的变化规律。研究发现阻力变化对不同工质热管的影响不同,对于CO_(2)热管,上升管阻力和下降管阻力对其传热性能的影响... 详细信息

通过实验研究了上升管和下降管阻力对CO_(2)、R134a和R410A分离式热管传热性能的影响,分析了热管传热极限和传热热阻的变化规律。研究发现阻力变化对不同工质热管的影响不同,对于CO_(2)热管,上升管阻力和下降管阻力对其传热性能的影响程度接近,当上升管或下降管阀门开度从90°降至30°时,CO_(2)热管的传热极限均由1200 W降为700 W。对于R134a和R410A热管而言,上升管阻力对其传热性能的影响更大,当上升管阀门开度从90°降至30°时,R410A热管的传热极限由1300 W降为700 W,R134a热管则未出现正常运行状态,管内始终存在较大的过热过冷度,两种热管的传热热阻也显著增大。而下降管阻力增大对R134a和R410A热管的传热性能几乎无影响。因此,在实际工程设计中,CO_(2)热管应采用上升管和下降管管径相同或相近的结构,而R134a和R410A热管适合采用上升管管径明显大于下降管管径的结构,以达到节省管材的目的。

关键词：分离式热管制冷剂流动阻力传热极限传热热阻

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沙粒粒径分布对高尔夫球在沙坑中球位的影响

草原与草坪 2024年第3期44卷 209-216页

作者：甄桐胡延凯西北师范大学附属中学高二一班甘肃兰州730070 成都牧笛高尔夫球场管理有限公司四川成都610041

【目的】探索沙坑沙粒粒径特征对沙坑中高尔夫球位的影响。【方法】选取兰州市高尔夫球场常用的3种沙坑沙进行粒径分布分析,确定粒径大小、级配指数、不均匀系数、曲率系数、静止角和沙面硬度;采用模拟高尔夫球坠入沙坑的方法,以不同沙... 详细信息

【目的】探索沙坑沙粒粒径特征对沙坑中高尔夫球位的影响。【方法】选取兰州市高尔夫球场常用的3种沙坑沙进行粒径分布分析,确定粒径大小、级配指数、不均匀系数、曲率系数、静止角和沙面硬度;采用模拟高尔夫球坠入沙坑的方法,以不同沙与粒径组分组合为处理,研究沙坑中球坑的大小和深度,推导不同沙粒组成对高尔夫球球位的影响以及可获得较为理想球位的沙坑沙应具备的粒径特征。【结果】选取的3种沙坑沙中,河沙质地较粗、粒径分布连续广泛且均匀、级配好、硬度大、稳定性强。从1 m高度模拟坠球,河沙球坑内径和深度显著小于土沙和山沙(P<0.05),不易产生“荷包蛋”球位。另外,通过对中粗粒径(0.25~20)mm组分和不同单一粒径组分进行1 m高度模拟坠球发现,0.25~2 mm粒径的河沙不容易产生埋嵌的“荷包蛋”球位。【结论】质地较粗、粒径分布广且均匀、级配好、细小沙粒少且粒径最佳在0.25~2 mm范围的沙能更好地形成较为理想的球位;粒径分布窄、级配差、中位粒径<0.5 mm的沙极容易形成“荷包蛋”球位。

关键词：沙坑沙球位粒径分布

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Advances in the design and manufacturing of novel freeform optics

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International Journal of Extreme Manufacturing 2022年第3期4卷 65-97页

作者： Sumit Kumar zhen tong Xiangqian Jiang EPSRC Future Metrology Hub Centre for Precision TechnologiesUniversity of HuddersfieldHuddersfield HD13DHUnited Kingdom

Freeform optics has become the most prominent element of the optics industry. Advanced freeform optical designs supplementary to ultra-precision manufacturing and metrology techniques have upgraded the lifestyle, thinking, and observing power of existing *** related to space explorations, portability, accessibility have also witnessed sensible in today’s time with freeform optics. Present-day design methods and fabrications techniques applicable in the development of freeform optics and the market requirements are focussed and explained with the help of traditional and non-traditional optical applications. Over the years,significant research is performed in the emerging field of freeform optics, but no standards are established yet in terms of tolerances and definitions. We critically review the optical design methods for freeform optics considering the image forming and non-image forming applications. Numerous subtractive manufacturing technologies including figure correction methods and metrology have been developed to fabricate extreme modern freeform optics to satisfy the demands of various applications such as space, astronomy, earth science, defence,biomedical, material processing, surveillance, and many more. We described a variety of advanced technologies in manufacturing and metrology for novel freeform optics. Next, we also covered the manufacturing-oriented design scheme for advanced optics. We conclude this review with an outlook on the future of freeform optics design, manufacturing and metrology.

关键词： freeform optics optical design optical fabrication ultra-precision machining surface metrology

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基于姿态估计的粮仓作业人员摔倒检测研究

计算机仿真 2024年第5期41卷 236-241页

作者：孙福艳桂崇文吕宗旺甄彤河南工业大学信息科学与工程学院河南郑州450001

近些年时常发生粮仓作业人员因意外跌入粮堆无法自救、熏蒸作业中毒晕倒等安全问题。为了及时获取有效信息,减少对工人的伤害,提出一种自下而上的人体姿态估计方法,建立对粮仓工作人员状态检测模型。首先制作不同角度的粮仓作业视频和... 详细信息

近些年时常发生粮仓作业人员因意外跌入粮堆无法自救、熏蒸作业中毒晕倒等安全问题。为了及时获取有效信息,减少对工人的伤害,提出一种自下而上的人体姿态估计方法,建立对粮仓工作人员状态检测模型。首先制作不同角度的粮仓作业视频和摔倒状态公共数据集;接着改进轻量级OpenPose算法,数据集引入算法生成骨骼图像;最后设计摔倒检测算法,得到一种基于姿态估计的粮仓作业人员摔倒检测模型。实验结果表明,检测摔倒状态准确率有所提高,轻量级OpenPose算法计算量较少,内存占用小,可以实时地检测粮仓作业人员摔倒状态。

关键词：人体姿态估计摔倒检测轻量级算法

Regulation of aging by NELF-A and RNA polymerase Ⅱ elongation

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Neural Regeneration Research 2024年第7期19卷 1415-1416页

作者： Chin-tong Ong zhen-Kai Ngian Temasek Life Sciences Laboratory and Department of Biological Sciences National University of SingaporeSingaporeSingapore Department of Genetics Harvard Medical SchoolBostonMAUSA Institute of Molecular and Cell Biology Agency for ScienceTechnology and ResearchSingaporeSingapore

Epigenetic regulation of aging:Aging is defined as the gradual decline of physiological function and cellular integrity,causing o rganismal vulnerability to age-onset diseases and *** in different animal models have l... 详细信息

关键词： aging twelve integrity

股骨远端90°锁定钢板与克氏针治疗大龄儿童股骨髁上骨折的疗效比较

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临床骨科杂志 2024年第3期27卷 424-428页

作者：张远鉴王意菊尹同珍刘阳河北省沧州中西医结合医院小儿骨科、骨肿瘤科河北沧州061013 沧州市中心医院骨科河北沧州061017

目的比较股骨远端90°锁定钢板与克氏针治疗大龄儿童股骨髁上骨折的疗效。方法采用随机数字表法将61例大龄儿童股骨髁上不稳定型骨折患儿分为观察组(31例,采用股骨远端90°锁定钢板治疗)和对照组(30例,采用闭合或切开复位克氏针治疗)。... 详细信息

目的比较股骨远端90°锁定钢板与克氏针治疗大龄儿童股骨髁上骨折的疗效。方法采用随机数字表法将61例大龄儿童股骨髁上不稳定型骨折患儿分为观察组(31例,采用股骨远端90°锁定钢板治疗)和对照组(30例,采用闭合或切开复位克氏针治疗)。记录两组手术情况、疼痛VAS评分、骨折愈合情况以及骨折再移位率,采用Johner-Wruhs标准评价疗效。结果患儿均获得随访,时间6~24个月。手术时间、术中透视次数观察组短(少)于对照组(P<0.05)。术后1个月疼痛VAS评分观察组低于对照组(P<0.05)。两组骨折均愈合,时间3~5个月。末次随访时采用Johner-Wruhs标准评价的疗效优良率观察组高于对照组(P<0.05)。随访期间观察组1例(3.2%)骨折再移位,对照组8例(26.7%)骨折再移位,骨折再移位率观察组小于对照组(P<0.05)。结论股骨远端90°锁定钢板治疗大龄儿童股骨髁上骨折,无需塑形、固定牢固、符合生物力学特点,效果良好;与克氏针治疗相比,手术时间更短,术中透视次数更少,患儿可以更早功能锻炼,骨折再移位率更低。

关键词：股骨髁上骨折股骨远端90°锁定钢板克氏针儿童