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Effect of cylinder wall parameters on the final packing density of mono-disperse spheres subject to three-dimensional vibrations Author links open overlay panel

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Particuology 2024年第8期91卷 211-225页

作者： jack R.Grogan Andrei L.Nicuşan Christopher R.K.Windows-Yule School of Chemical Engineering The University of BirminghamEdgbastonBirminghamB152TTUK

Achieving densely packed particles is desirable within the industries of ceramics,pharmaceuticals,defence and additive *** this work,we use the discrete element method(DEM)to determine the effect of wall parameters on the final packing density of mono-disperse spheres subject to 4 varying three-dimensional vibration and fill *** focus specifically on the impact of the container wall parameters on the particles'final packing *** on from the validation of the DEM simulation the particle-wall coefficient of restitution,the particle-wall coefficient of rolling friction and the particle-wall coefficient of sliding friction were varied individually and the effect on the final packing density *** relatively low particle-particle friction glass beads,the effect of these wall properties had no discernible effect on the final packing density *** on from these findings the particle-wall properties were varied at the extreme values of particle-particle coefficient of rolling friction and particle-particle coefficient of sliding *** a particle-particle coefficient of sliding friction=1,increases in particle-wall coefficient of restitution resulted in a minor increase in the final packing density of particles though this was not statistically *** a particle-particle coefficient of sliding friction=1,increases in particle-wall coefficient of rolling friction resulted in a minor decrease in the final packing density of the particles though again not to a degree where the trend can,with complete certainty,be distinguished from the random error across the ***,when the particle-particle coefficient of sliding friction=1,increases in particle-wall coefficient of sliding friction resulted in a significant decrease in the final packing density of *** decrease was attributed to the propagation of force chains throughout the *** significant decrease in final packing density with

关键词： Vibropacking Packing Densification Vibration Discrete element method Friction Wall friction Restitution

人类端粒酶逆转录酶hTERT Ki-67及p27kip1在嗜铬细胞瘤组织的表达及意义研究

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中国实用内科杂志 2006年第22期26卷 1788-1790页

作者：李健玲罗佐杰秦映芬韦敏怡梁杏欢冼晶卢德成沈昱何志恒 jack Y.yang Mary Qu yang 广西医科大学第一附属医院内分泌科 the Research Division Joslin Diabetes CenterHarvard Medical School Harvard University Massachusetts General HospitalHarvard Medical School U.S. Department of Health and Human Services National Human Genome Research Institute

目的研究人端粒酶逆转录酶(hTERT)、Ki-67及p27kip1的表达在嗜铬细胞瘤发生与发展中的作用和作为预测生物学行为标志物的价值。方法采用免疫组织化学方法检测hTERT、Ki-67及p27kip1在2000—2004年广西医科大学第一附属医院病理科的45例... 详细信息

目的研究人端粒酶逆转录酶(hTERT)、Ki-67及p27kip1的表达在嗜铬细胞瘤发生与发展中的作用和作为预测生物学行为标志物的价值。方法采用免疫组织化学方法检测hTERT、Ki-67及p27kip1在2000—2004年广西医科大学第一附属医院病理科的45例嗜铬细胞瘤和神经节细胞瘤及9例正常肾上腺组织中的表达。结果hTERT蛋白的表达在良性(3/31例)和可疑恶性(6/7例)以及良性与恶性肿瘤(5/7例)间的差异均有统计学意义(P<0.01)。31例良性肿瘤中26例未检测到Ki-67,而恶性肿瘤和可疑恶性肿瘤均为阳性;Ki-67与hTERT的表达呈正相关性(r=0.544,P<0.01)。恶性和可疑恶性肿瘤中未检测到p27kip1,5例良性肿瘤为阳性,所有正常肾上腺髓质标本均可检测到p27kip1的表达。p27kip1与hTERT的表达无相关性。结论端粒酶的激活在恶性嗜铬细胞瘤和神经节细胞瘤的发生发展中起着重要作用,在细胞周期调控中端粒酶可能存在不同的激活途径。hTERT和Ki-67的检测可作为鉴别良恶性嗜铬细胞瘤的手段。

关键词：嗜铬细胞瘤神经节细胞瘤 hTERT Ki-67 p27kip1

等效均匀剂量优化法在肺癌调强放疗计划优化中的应用

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肿瘤预防与治疗 2012年第6期25卷 337-340页

作者：廖雄飞 jack yang Yie Chen 黎杰王培四川省肿瘤医院放疗科成都610041 Monmouth Medical Center放疗中心美国新泽西07740

目的:评估等效均匀剂量(EUD)优化法在肺癌调强放疗计划优化中的作用。方法:随机抽取10例治疗计划基于剂量-体积优化法得到,且已完成调强放射治疗的肺癌病例,将治疗计划中的危及器官全肺、心脏以及脊髓的约束条件改为EUD约束,保持其它优... 详细信息

目的:评估等效均匀剂量(EUD)优化法在肺癌调强放疗计划优化中的作用。方法:随机抽取10例治疗计划基于剂量-体积优化法得到,且已完成调强放射治疗的肺癌病例,将治疗计划中的危及器官全肺、心脏以及脊髓的约束条件改为EUD约束,保持其它优化条件不变,设计出新的治疗计划,比较新旧治疗计划的剂量学差异。结果:在靶区剂量分布没有差别甚至更好的情况下,基于EUD优化能够使全肺的V_(20)和D_(mean)分别降低2.1%、1.0Gy,心脏的D_(33)和D_(mean)分别降低2.2Gy、1.9Gy,脊髓的D_(1cc)降低6Gy,经配对t检验,差异均有统计学意义(P<0.05)。结论:EUD优化能够有效降低全肺、心脏以及脊髓的受照剂量,这对于降低肺癌患者放射治疗并发症具有重大意义,同时也为进一步提高肿瘤靶区剂量,提高肿瘤局部控制率提供了可能。

关键词：等效均匀剂量肺癌调强放射治疗优化

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Glia-to-neuron reprogramming to the rescue?

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Neural Regeneration Research 2025年第5期20卷 1395-1396页

作者： jack W.Hickmott Cindi M.Morshead Department of Surgery University of TorontoTorontoONCanada Donnelly Centre for Cellular and Biomolecular Research TorontoONCanada Institute of Biomedical Engineering University of TorontoTorontoONCanada The KITE Research Institute Toronto Rehabilitation InstituteUniversity Health NetworkTorontoONCanada

Over the last two decades,the dogma that cell fate is immutable has been increasingly challenged,with important implications for regenerative *** brea kth rough discovery that induced pluripotent stem cells could be generated from adult mouse fibroblasts is powerful proof that cell fate can be *** exciting extension of the discovery of cell fate impermanence is the direct cellular reprogram ming hypothesis-that terminally differentiated cells can be reprogrammed into other adult cell fates without first passing through a stem cell state.

关键词： programming passing proof

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Methodological considerations of priming repetitive transcranial magnetic stimulation protocols in clinical populations

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General Psychiatry 2024年第1期37卷 173-176页

作者： jack Jiaqi Zhang Zhongfei Bai Kenneth N K Fong Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong KongChina Shanghai yangZhi Rehabilitation Hospital(Shanghai Sunshine Rehabilitation Centre) School of MedicineTongji UniversityShanghaiChina

INTRODUCTION Repetitive transcranial magnetic stimulation(rTMS)is a neuroplasticity-enhancing technique that modifies brain responsiveness to various therapeutic modalities in clinical psychiatric and neurological applications. Furthermore,its effect can be attributed to long-term potentiation(LTP)or longterm depression(LTD)-like ***,responsiveness to rTMS is largely variable in healthy and pathological brains and is mediated by complex biological *** refers to a higher-order plasticity mechanism in which the direction and magnitude of synaptic plasticity are modified by prior neuronal activity and is believed to be a significant factor leading to the response variability of rTMs.

关键词： stimulation clinical transcranial

The Impact of Sea Level Rise on Roadway Design and Evacuation Routes in Delaware

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American Journal of Climate Change 2024年第1期13卷 69-82页

作者： jack Palevich Ardeshir Faghri Ahmet Karakurt Department of Civil & Environmental Engineering University of Delaware Newark DE USA

As the global temperature continues to increase, the sea level continues to rise at a rapid rate that has never been seen before. This becomes an issue for many facets of life but one of the most impacted is the transportation infrastructure. Many people living in low elevation coastal areas can become trapped by flooding with no way in or out. With Delaware being a coastal state, this would affect a large portion of the population and will have detrimental effects over time if nothing is done to combat sea level rise. The issue with sea level rise in transportation is that once the roads become flooded, they become virtually unusable and detour routes would be needed. If all the roads in a coastal area were to be affected by sea level rise, the options for detours would become limited. This article looks at direct solutions to combat sea level rise and indirect solutions that would specifically help transportation infrastructure and evacuation routes in Delaware. There is not one solution that can fix every problem, so many solutions are laid out to see what is applicable to each affected area. Some solutions include defense structures that would be put close to the coast, raising the elevation of vulnerable roads throughout the state and including pumping stations to drain the water on the surface of the road. With an understanding of all these solutions around the world, the ultimate conclusion came in the form of a six-step plan that Delaware should take in order to best design against sea level rise in these coastal areas.

关键词： Sea Level Rise Roadway Design Evacuation Routes

“机械灌注+”应用于扩大标准供肝移植--肝尽其用

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Engineering 2024年第1期32卷 29-40页

作者： Zhoucheng Wang jack Martin Jiongjie Yu Kai Wang Kourosh Saeb-Parsy Xiao Xu Zhejiang University School of Medicine Hangzhou 310058China Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province Hangzhou 310006China Department of Surgery Cambridge University Hospitals&NHS Foundation TrustCambridge CB22QQ UK Department of Surgery University of Cambridge&NIHR Cambridge Biomedical Research CentreCambridge CB22QQUK Institute of Organ Transplantation Zhejiang UniversityHangzhou 310003China

Transplantation represents the most effective treatment for end-stage liver diseases but is limited by the shortage of healthy donor *** criteria donor(ECD)liver grafts are increasingly utilized in clinical practice to mitigate this ***,impaired ischemic tolerance of these grafts jeopardizes organ viability during cold *** perfusion(MP)was designed to improve organ preservation and reduce posttransplant ***,it is increasingly evident that MP alone may not preserve ECD grafts *** emphasis has thus been placed on modified MP strategies,including the use of different perfusates,modified perfusion modalities,and different therapeutic ***,we introduce a novel term,"MP Plus,"denoting these additional strategies that are designed to restore organ function and potentially enable regeneration of ECD *** this review,we summarize the existing and potential modified MP strategies and discuss their advantages in reconditioning different ECD grafts in clinical settings.

关键词： Liver transplantation Extended criteria donor Machine perfusion plus Organ shortage

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木材的交响乐赋予家具一种特殊的和谐

新世纪智能 2024年第Z8期 8-11页

作者： jack

Classical Chinese furniture is viewed by enthusiasts as a symbol of the harmonious integration of the simple and the complicated, engineering and *** first glimpse of a chair, desk, cabinet, cosmetic box, bed or any other fine piece of furniture made in the classical Chinese style—often out of precious wood—impresses with its minimalist silhouette(简约的轮廓).

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中国的世界观植根于其古老的文明

新世纪智能 2024年第ZG期 4-7页

作者： jack

Chinese civilization, characterized by its vast scope and profound depth, stands as a treasure trove of inspiration for the contemporary Chinese *** back over 5,000 years without interruption, the Chinese civilization boasts the prominent features of consistency, originality,uniformity, inclusivity and a peaceful nature.

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