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Increased retinal venule diameter as a prognostic indicator for recurrent cerebrovascular events:a prospective observational study

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Neural Regeneration Research 2024年第5期19卷 1156-1160页

作者： Ying Zhao Dawei dong Ding Yan Bing Yang Weirong Gui Man Ke Anding Xu zefeng Tan Department of Neurology and Stroke Center the First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong ProvinceChina Clinical Neuroscience Institute the First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong ProvinceChina Department of Neurology the First People’s Hospital of FoshanFoshanGuangdong ProvinceChina

Microvasculature of the retina is considered an alternative marker of cerebral vascular risk in healthy ***,the ability of retinal vasculature changes,specifically focusing on retinal vessel diameter,to predict the recurrence of cerebrovascular events in patients with ischemic stroke has not been determined *** previous studies have shown a link between retinal vessel diameter and recurrent cerebrovascular events,they have not incorporated this information into a predictive ***,this study aimed to investigate the relationship between retinal vessel diameter and subsequent cerebrovascular events in patients with acute ischemic ***,we sought to establish a predictive model by combining retinal veessel diameter with traditional risk *** performed a prospective observational study of 141 patients with acute ischemic stroke who were admitted to the First Affiliated Hospital of Jinan *** of these patients underwent digital retinal imaging within 72 hours of admission and were followed up for 3 *** found that,after adjusting for related risk factors,patients with acute ischemic stroke with mean arteriolar diameter within 0.5-1.0 disc diameters of the disc margin(MAD_(0.5-1.0DD))of≥74.14μm and mean venular diameter within 0.5-1.0 disc diameters of the disc margin(MVD_(0.5-1.0DD))of≥83.91μm tended to experience recurrent cerebrovascular *** established three multivariate Cox proportional hazard regression models:model 1 included traditional risk factors,model 2 added MAD_(0.5-1.0DD)to model 1,and model 3 added MVD0.5-1.0DD to model *** 3 had the greatest potential to predict subsequent cerebrovascular events,followed by model 2,and finally model *** findings indicate that combining retinal venular or arteriolar diameter with traditional risk factors could improve the prediction of recurrent cerebrovascular events in patients with acute ischemic stroke,and that retinal imaging c

关键词： acute ischemic stroke arteriolar cerebrovascular events diameter digital retinal imaging microvasculature prediction recurrent retina venular

BIM技术在园林工程中的运用——以上海迪士尼1.5期为例

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中国园林 2019年第3期35卷 116-119页

作者：董则奉上海园林(集团)有限公司第一分公司

以上海迪士尼1.5期为例,阐述BIM(Building InformationModeling)技术在园林工程中的运用流程、建模策略、模型精度需求以及在实际施工中的运用优劣势。根据1.5期园林BIM模型的建模经验,总结出不同园林要素的BIM建模策略。以实际的园林... 详细信息

以上海迪士尼1.5期为例,阐述BIM(Building InformationModeling)技术在园林工程中的运用流程、建模策略、模型精度需求以及在实际施工中的运用优劣势。根据1.5期园林BIM模型的建模经验,总结出不同园林要素的BIM建模策略。以实际的园林施工需求为标准,对这些园林要素的BIM模型精度需求进行讨论。研究BIM技术的直观化特性和数据化特性为园林工程带来的构造性优势、综合性优势、避让性优势、快速查询优势和工程量核算优势,进而探讨这些BIM技术优势为园林工程带来的积极意义。

关键词：风景园林上海迪士尼 BIM技术园林工程

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一种基于空间累进预测的图像编码算法

华中科技大学学报（自然科学版） 2005年第4期33卷 20-22页

作者：卢正鼎许铁军董泽锋华中科技大学计算机科学与技术学院湖北武汉430074

提出一种结合空间层次累进的预测编码方法,在预测过程中能够利用被预测像素的四周像素对其进行预测.通过构建层次结构图来将图像中的像素划分等级,根据层次等级不同依次进行预测,预测过程中采用实时处理的思想,以减少对内存的需求.根据... 详细信息

提出一种结合空间层次累进的预测编码方法,在预测过程中能够利用被预测像素的四周像素对其进行预测.通过构建层次结构图来将图像中的像素划分等级,根据层次等级不同依次进行预测,预测过程中采用实时处理的思想,以减少对内存的需求.根据不同等级像素重要性不同的特性,采用改进的嵌入零树小波编码方法对预测结果进行多阈值量化.实验结果表明,方法计算简单,内存要求小,性能优于JPEG ,在实时和无线多媒体等计算能力较弱的环境中尤为适用.

关键词：图像编码算法预测编码层次累进嵌入零树小波编码多阈值量化

Thrombus migration in patients with acute ischaemic stroke undergoing endovascular thrombectomy

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Stroke & Vascular Neurology 2024年第2期9卷 126-133,I0006-I0395页

作者： zefeng Tan Lei Zhang Li'an Huang Hongyu Qiao Min Guan Bing Yang Pengfei Yang Yongwei Zhang Hongjian Shen Yu Zhou Bo Hong Huaizhang Shi Hongxing Han Xinyi Leng Yi dong Changlin Lian Wenhuo Chen Anding Xu Jianmin Liu Neurology First People's Hospital of FoshanFoshanGuangdongChina Department of Neurology Jinan University First Affiliated HospitalGuangzhouGuangdongChina Neurovascular Center Changhai HospitalNaval Medical UniversityShanghaiChina Department of Neurosurgery First Affiliated Hospital of Harbin Medical UniversityHarbinChina Department of Neurology Linyi People's HospitalLinyiShandongChina Medicine&Therapeutics The Chinese University of Hong KongHong KongChina Neurology Huashan Hospital Fudan UniversityShanghaiChina Neurology Zhangzhou Municipal Hospital of Fujian Province and Zhangzhou Affiliated Hospital of Fujian Medical UniversityZhangzhouFujianChina Stroke Center Jinan University First Affiliated HospitalGuangzhouGuangdongChina

Objective The impact of thrombus migration(TM)prior to endovascular thrombectomy(EVT)on clinical outcomes and revascularisation rates remains *** aimed to examine whether preinterventional TM modifies the treatment effects of direct EVT versus bridging EVT in acute large vessel occlusion *** All patients undergoing catheter angiography in the Direct Intra-arterial thrombectomy in order to Revascularise acute ischaemic stroke patients with large vessel occlusion Efficiently in Chinese Tertiary hospitals:A Multicentre randomised clinical Trial were *** was determined by radiologists unaware of the study by analysing discrepancies between computed tomographic angiography at baseline and first-run digital subtraction angiography before *** primary outcome was the score on the modified Rankin scale(mRS)assessed at 90 *** Of 627 included patients,the TM rate was 11.3%(71/627).In the multivariable logistic regression model,baseline National Institutes of Health Stroke Scale score(adjusted OR 0.956,95%CI 0.916 to 0.999;p=0.043)and intravenous thrombolysis(adjusted OR 2.614,95%CI 1.514 to 4.514;p<0.001)were independently associated with *** patients with TM were less likely to be completely recanalised than those without TM(21.27%vs 36.23%,p=0.040).The interaction of TM and the EVT treatment effect did not significantly affect mRS shift analysis(p=0.687)or mRS scores of 0 to 1(p=0.436).Conclusion Preinterventional TM does not modify the treatment effects of direct versus bridging EVT on functional outcomes in patients with acute ischaemic stroke with anterior large vessel *** leads to a lower complete recanalisation rate.

关键词： patients throm acute

Resonance mechanism of flapping wing based on fluid structure interaction simulation

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Chinese Journal of Aeronautics 2024年第5期37卷 243-262页

作者： Yueyang GUO Wenqing YANG Yuanbo dong dong XUE National Key Laboratory of Science and Technology on Aerodynamic Design and Research School of AeronauticsNorthwestern Polytechnical UniversityXi'an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063China Yangtze River Delta Research Institute of Northwestern Polytechnical University Taicang 215400China

Certain insect species have been observed to exploit the resonance mechanism of their *** order to achieve resonance and optimize aerodynamic performance,the conventional approach is to set the flapping frequency of flexible wings based on the Traditional Structural Modal(TSM)***,there exists controversy among researchers regarding the relationship between frequency and aerodynamic *** that the structural response of wings can be influenced by the surrounding air vibrations,an analysis known as Acoustic Structure Interaction Modal(ASIM)is introduced to calculate the resonant *** this study,Fluid Structure Interaction(FSI)simulations are employed to investigate the aerodynamic performance of flapping wings at modal frequencies derived from both TSM and ASIM *** performance is evaluated for various mass ratios and frequency ratios,and the findings indicate that the deformation and changes in vortex structure exhibit similarities at mass ratios that yield the highest aerodynamic ***,the flapping frequency associated with the maximum time-averaged vertical force coefficient at each mass ratio closely aligns with the ASIM frequency,as does the frequency corresponding to maximum ***,the ASIM analysis can provide an effective means for predicting the optimal flapping frequency for flexible ***,it enables the prediction that flexible wings with varying mass ratios will exhibit similar deformation and vortex structure *** paper offers a fresh perspective on the ongoing debate concerning the resonance mechanism of Flexible Flapping Wings(FFWs)and proposes an effective methodology for predicting their aerodynamic performance.

关键词： Flexible Flapping Wing(FFW) Acoustic Structure Interaction Modal(ASIM) Fluid Structure Interaction(FSI) Resonance mechanism Aerodynamic performance

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无人机航拍测绘技术在园林工程中的运用

建筑施工 2019年第6期41卷 1109-1112页

作者：董则奉上海园林(集团)有限公司第一分公司

结合施工案例,介绍了无人机航拍测绘技术在园林工程现场踏勘、放样复核和竣工测绘阶段的运用流程。针对无人机测绘技术的拍摄距离远、定位精度高、操作效率快、运营成本低等特点的研究,讨论了该技术为园林工程建设所带来的积极意义。

关键词：园林工程无人航拍测绘技术现场踏勘放样复核竣工测绘

Finite-time Prescribed Performance Time-Varying Formation Control for Second-Order Multi-Agent Systems With Non-Strict Feedback Based on a Neural Network Observer

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 1039-1050页

作者： Chi Ma Dianbiao dong the School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China

This paper studies the problem of time-varying formation control with finite-time prescribed performance for nonstrict feedback second-order multi-agent systems with unmeasured states and unknown *** eliminate nonlinearities,neural networks are applied to approximate the inherent dynamics of the *** addition,due to the limitations of the actual working conditions,each follower agent can only obtain the locally measurable partial state information of the leader *** address this problem,a neural network state observer based on the leader state information is ***,a finite-time prescribed performance adaptive output feedback control strategy is proposed by restricting the sliding mode surface to a prescribed region,which ensures that the closed-loop system has practical finite-time stability and that formation errors of the multi-agent systems converge to the prescribed performance bound in finite ***,a numerical simulation is provided to demonstrate the practicality and effectiveness of the developed algorithm.

关键词： Finite-time control multi-agent systems neural network prescribed performance control time-varying formation control

Copper slag assisted coke reduction of phosphogypsum for sulphur dioxide preparation

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Chinese Journal of Chemical Engineering 2024年第1期65卷 43-53页

作者： dong Ma Qinhui Wang State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027China

The reduction of phosphogypsum(PG)to lime slag and SO_(2)using coke can effectively alleviate the environmental problems caused by ***,the PG decomposition temperature remains high and the product yield remains *** adding additives,the decomposition temperature can be further reduced and PG decomposition rate and product yield can be ***,the use of current additives such as Fe_(2)O_(3)and SiO_(2)brings the problem of increasing economic ***,it is proposed to use solid waste copper slag(CS)as a new additive to reduce PG to prepare SO2,which can reduce the cost and meet the environmental benefits at the same *** effects of proportion,temperature and thermostatic time on PG decomposition are investigated by experimental and kinetic analysis combined with FactSage thermodynamic calculations to optimize the roasting ***,the reaction mechanism is *** is found that adding CS to the coke and PG system can increase the rate of PG decomposition and SO_(2)yield while lowering the PG decomposition *** example,when the CS/PG mass ratio increases from 0 to 1,PG decomposition rate increases from 83.38%to 99.35%,SO_(2)yield increases from 78.62%to 96.81%,and PG decomposition temperature decreases from 992.4℃to 949.6℃.The optimal reaction parameters are CS/PG mass ratio of 1,Coke/PG mass ratio of 0.06 at 1100℃for 20 min with 99.35%PG decomposition rate and 96.81%SO_(2) *** process proceeds according to the following reactions:2CaSO_(4)+ 0.7C + 0.8Fe_(2)SiO_(4)→0.8Ca_(2)SiO_(4)+ 0.2Ca_(2)Fe_(2)O_(5)+ 0.4Fe_(3)O_(4)+2SO_(2)+ 0.7CO_(2)Finally,a process for decomposing PG with coke and CS is proposed.

关键词： Phosphogypsum Sulfur dioxide Copper slag Fluidized-bed Reduction Waste treatment

Decision and Coordination in a Closed-Loop Supply Chain with Product Recycling Under Different Low-Carbon Regulations

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Journal of the Operations Research Society of China 2024年第3期12卷 695-728页

作者： Qian-dong dong Hai-Wen Xu School of Management and Engineering Nanjing UniversityNanjing210093JiangsuChina School of Science Civil Aviation Flight University of ChinaGuanghan618307SichuanChina

The implementation of recycling activity is of great significance to closed-loop supply chain ***’environmental awareness and governmental subsidy are considered in the two-echelon closed-loop supply *** types of decision-making structures are proposed under different carbon emission *** subsidy sharing mechanism is designed to resolve the channel members’conflict caused by double *** paper provides insight into the effect of environmental awareness and government subsidy under different low-carbon regulations on the supply chain benefit and social welfare via the game *** analysis results display that the government subsidy and subsidy sharing mechanism are profitably beneficial to the whole supply chain and social ***,a noteworthy result reveals that social welfare is not always directly proportional to consumers’environmental *** welfare decreases slightly with the increase in consumers’environmental awareness when consumers’environmental awareness is ***,social welfare will be significantly improved when consumers’environmental awareness increases beyond a certain threshold.

关键词： Closed-loop supply chain Recycling Coordination Social welfare Game theory Carbon emissions