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国土空间生态修复规划中土地利用冲突分析框架与应用路径

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规划师 2024年第3期40卷 53-59页

作者：王蓓岳邦瑞董清榕雷雅茹薛建锋西安建筑科技大学建筑学院咸阳市规划设计研究院

在国土空间生态修复规划中,忽视土地利用冲突分析可能导致生态修复关键区的识别失准,阻碍国土空间生态修复规划的有效推进。采用内涵分析、类型比较、模型解析等方法建构土地利用冲突分析框架,以水源涵养视角下的西安市长安区国土空间... 详细信息

在国土空间生态修复规划中,忽视土地利用冲突分析可能导致生态修复关键区的识别失准,阻碍国土空间生态修复规划的有效推进。采用内涵分析、类型比较、模型解析等方法建构土地利用冲突分析框架,以水源涵养视角下的西安市长安区国土空间生态修复关键区识别为例进行实证研究:首先,基于3类土地利用冲突经典模型和3类冲突识别方法的比较研究,结合“格局—过程—功能—服务”理论建构土地利用冲突研究的空间分析框架;其次,提出“场地认知—指标选取—生态修复关键区识别”的应用路径;最后,结合实践阐述框架的具体应用路径和操作方法。

关键词：土地利用冲突分析框架国土空间生态修复规划生态修复关键区

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经皮腹膜后胰腺坏死组织视频辅助与开腹清创引流术的疗效对比

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河南医学研究 2024年第10期33卷 1821-1825页

作者：宋盛平张旭宗可薛建锋郑州大学第一附属医院肝胆胰外科河南郑州450000

目的对比研究经皮腹膜后胰腺坏死组织视频辅助清创引流术与开腹胰腺坏死组织清创引流术的临床疗效。方法回顾性选取2020年4月至2022年4月收治的50例急性坏死性胰腺炎患者临床资料,依据治疗方式分为A组(28例)、B组(22例),前者行经皮腹... 详细信息

目的对比研究经皮腹膜后胰腺坏死组织视频辅助清创引流术与开腹胰腺坏死组织清创引流术的临床疗效。方法回顾性选取2020年4月至2022年4月收治的50例急性坏死性胰腺炎患者临床资料,依据治疗方式分为A组(28例)、B组(22例),前者行经皮腹膜后胰腺坏死组织视频辅助清创引流术,后者行开腹胰腺坏死组织清创引流术。比较两组手术指标、手术前后免疫功能[CD3^(+)、白细胞计数(WBC)、CD4^(+)]、生化指标[血钙、血清淀粉酶、血糖]、炎症应激指标[髓样分化蛋白-88(MyD88)、白细胞介素-4(IL-4)、5-羟色胺(5-HT)]、术后并发症。结果两组清创前ICU停留例数相比,差异无统计学意义(P>0.05);与B组相比,A组住院时间、术后排气时间、手术时间较短,进食时间较早,出血量较少(P0.05)。结论经皮腹膜后胰腺坏死组织视频辅助清创引流术能改善患者免疫功能,降低生化指标,减轻炎症应激反应,安全性较好。

关键词：急性坏死性胰腺炎清创引流术开腹术经皮腹膜后入路

三维打印导板辅助关节镜下微创踝关节融合术治疗晚期踝关节炎的临床效果

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中华外科杂志 2024年第6期62卷 572-580页

作者：李广翼王诚王嘉正吴承霖张解元邹剑薛剑锋苏琰梅国华施忠民马昕上海交通大学医学院附属第六人民医院骨科上海200233

目的比较三维打印导板辅助关节镜下微创踝关节融合术和传统开放式踝关节融合术治疗晚期踝关节炎的临床效果。方法本研究为回顾性队列研究。回顾性分析2018年5月至2023年2月上海交通大学医学院附属第六人民医院骨科收治的256例行踝关节... 详细信息

目的比较三维打印导板辅助关节镜下微创踝关节融合术和传统开放式踝关节融合术治疗晚期踝关节炎的临床效果。方法本研究为回顾性队列研究。回顾性分析2018年5月至2023年2月上海交通大学医学院附属第六人民医院骨科收治的256例行踝关节融合术的晚期创伤性踝关节炎患者资料。男性119例,女性137例,年龄(59.6±9.5)岁(范围:37~83岁)。其中行接骨板螺钉内固定(外侧+内侧双入路58例,单纯外侧入路117例)175例;行传统开放式前路螺钉内固定48例(传统开放组);行三维打印导板辅助关节镜下微创踝关节融合术33例(三维打印导板组)。采用倾向性评分匹配对三维打印导板组和传统开放组患者的基本资料进行1∶1匹配,卡钳值为0.02。采用独立样本t检验、Mann-Whitney U检验、Wilcoxon符号秩检验、χ^(2)检验或矫正χ^(2)检验对患者围手术期数据及随访资料进行比较。结果三维打印导板组和传统开放组各20例匹配成功,术前基本资料的差异均无统计学意义(P值均>0.05)。与传统开放组相比,三维打印导板组的手术时间更长[(88.9±5.6)min比(77.9±11.7)min;t=-2.392,P=0.022],但术中透视次数更少[(1.7±0.8)次比(5.2±1.2)次;t=10.604,P<0.01],住院时间更短[(5.5±0.9)d比(6.4±1.5)d;t=2.480,P=0.018],差异均有统计学意义。三维打印导板组的融合率为95.0%(19/20),传统开放组为85.0%(17/20),组间差异无统计学意义(χ^(2)=0.278,P=0.598);传统开放组的融合时间为(12.1±2.0)周,三维打印导板组为(11.1±1.7)周,组间差异无统计学意义(t=1.607,P=0.116)。末次随访时,三维打印导板组的美国足踝外科学会踝与后足评分为(72.6±5.5)分,传统开放组为(70.5±5.8)分,差异无统计学意义(t=-1.003,P=0.322);三维打印导板组的疼痛视觉模拟评分为[M(IQR)]1.50(1.00)分,低于传统开放组的3.00(1.00)分,差异有统计学意义(Z=-3.937,P<0.01)。传统开放组与三维打印导板组并发症发生率的差异无统计学意义[25.0%(5/20)比5.0%(1/20),χ^(2)=1.765,P=0.184]。结论三维打印导板辅助关节镜进行踝关节融合术与传统开放手术相比,手术时间略长,但在减少术中透视次数、减轻术后疼痛和缩短住院天数方面有一定优势。

关键词：骨关节炎踝关节踝关节炎踝关节融合术关节镜导板三维打印

Prescribed-Time Nash Equilibrium Seeking for Pursuit-Evasion Game

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1518-1520页

作者： Lei xue jianfeng Ye Yongbao Wu Jian Liu D.C.Wunsch Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationNanjing 210096 School of Automation Southeast UniversityNanjing 210096China Department of Electrical and Computer Engineering Missouri University of Science and TechnologyRollaMO 65409 USA IEEE

Dear Editor,This letter is concerned with prescribed-time Nash equilibrium(PTNE)seeking problem in a pursuit-evasion game(PEG)involving agents with second-order *** order to achieve the prior-given and user-defined convergence time for the PEG,a PTNE seeking algorithm has been developed to facilitate collaboration among multiple pursuers for capturing the evader without the need for any global ***,it is theoretically proved that the prescribedtime convergence of the designed algorithm for achieving Nash equilibrium of ***,the effectiveness of the PTNE method was validated by numerical simulation results.A PEG consists of two groups of agents:evaders and *** pursuers aim to capture the evaders through cooperative efforts,while the evaders strive to evade *** is a classic noncooperative *** has attracted plenty of attention due to its wide application scenarios,such as smart grids[1],formation control[2],[3],and spacecraft rendezvous[4].It is noteworthy that most previous research on seeking the Nash equilibrium of the game,where no agent has an incentive to change its actions,has focused on asymptotic and exponential convergence[5]-[7].

关键词： seeking prescribed convergence

Management of Lisfranc injury with anterolateral calcaneal compression fracture

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Chinese Medical Journal 2022年第6期135卷 727-729页

作者： Wenqi Gu Rui Zhang Wanjun Liu Zhongmin Shi Guohua Mei jianfeng xue Jian Zou Xiaokang Wang Jiantao Jiang Department of Orthopedics Shanghai Jiaotong University Affiliated Sixth People's HospitalShanghai 200233China Department of Orthopedics The People's Hospital of Ludian CountyLudianYunnan 657100China

To the Editor:The mechanism of Lisfranc injury is complex and may cause different patterns of fractures or dislocation of the midfoot *** force injury is a special injury pattern,which may cause the fracture or(and)dislocation of the lateral column of the Lisfranc joint,especially the cuboid.[1,2,3]However,the anterolateral calcaneus is less commonly *** the fragment of the calcaneocuboid(CC)joint facet is too uncon-spicuous to manifest on a plain X-ray,and surgeons always pay more attention to the Lisfranc joint,anterolateral calcaneal compression fracture and even Chopart joint injuries are often overlooked,which may lead to a delayed surgical management,chronic foot deformities,and functional disability.

关键词： fracture dislocation injuries

DEM Modeling of Particle Breakage in Silica Sands under One-Dimensional Compression

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Acta Mechanica Solida Sinica 2016年第1期29卷 78-94页

作者： Danda Shi Lin Zheng jianfeng xue Jing Sun School of Ocean Science and Engineering Shanghai Maritime University School of Engineering and Information Technology Federation University Australia

A Discrete Element Method （DEM） model is developed to study the particle break- age effect on the one-dimensional compression behavior of silica sands. The ＇maximum tensile stress＇ breakage criterion considering multiple contacts is adopted to simulate the crushing of circular particles in the DEM. The model is compared with published experimental results. Com- parison between the compression curves obtained from the numerical and experimental results shows that the proposed method is very effective in studying the compression behavior of silica sands considering particle breakage. The evolution of compression curves at different stress levels is extensively studied using contact force distribution, variation of contact number and particle size distribution curve with loading. It is found that particle breakage has great impact on com- pression behavior of sand, particularly after the yield stress is reached and particle breakage starts. The crushing probability of particles is found to be macroscopically affected by stress level and particle size distribution curve, and microscopically related to the evolutions of contact force and coordination number. Once the soil becomes well-graded and the average coordination number is greater than 4 in two-dimension, the crushing probability of parent particles can reduce by up to 5/6. It is found that the average contact force does not always increase with loading, but increases to a peak value then decreases once the soil becomes more well-graded. It is found through the loading rate sensitivity analysis that the compression behavior of sand samples in the DEM is also affected by the loading rate. Higher yield stresses are obtained at higher loading rates.

关键词： particle breakage silica sand particle breakage criterion one-dimensional com-pression Discrete Element Method (DEM)

Tightrope弹性固定与Lisfranc螺钉固定治疗韧带损伤型Myerson B2型跖跗关节损伤的中期随访比较研究

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中华骨与关节外科杂志 2024年第4期17卷 307-313页

作者：薛剑锋顾文奇王诚宋国勋傅绍菱王嘉正吴承霖张解元梅国华苏琰邹剑施忠民上海交通大学医学院附属第六人民医院骨科上海200233

目的:比较Tightrope弹性固定与Lisfranc螺钉固定治疗韧带损伤型Myerson B2型跖跗关节损伤的临床疗效。方法:回顾性分析2015年2月至2019年6月收治的28例韧带损伤型MyersonB2型跖跗关节损伤患者的临床资料,根据固定方式的不同分为Lisfran... 详细信息

目的:比较Tightrope弹性固定与Lisfranc螺钉固定治疗韧带损伤型Myerson B2型跖跗关节损伤的临床疗效。方法:回顾性分析2015年2月至2019年6月收治的28例韧带损伤型MyersonB2型跖跗关节损伤患者的临床资料,根据固定方式的不同分为Lisfranc螺钉固定的螺钉固定组15例,Tightrope弹性固定的弹性固定组13例。采用影像学检查评估关节复位保持情况及有无关节退行性变,使用美国足踝外科协会(AOFAS)中足评分、足部功能指数(FFI)及疼痛视觉模拟评分(VAS)评估临床疗效,记录并发症发生情况。结果:28例患者获得36~75个月随访,平均随访(57.9±11.1)个月,弹性固定组患者术后6个月的AOFAS中足评分、FFI、VAS评分均优于螺钉固定组(P均0.05)。螺钉固定组中12例(80.0%)患者于术后7~12个月行二次手术取出内固定,平均取出时间为术后(9.8±1.3)个月;弹性固定组中1例患者因锁扣板软组织刺激疼痛于术后12个月行二次手术取出内固定。两组无一例患者发生创伤性关节炎。结论:Tightrope弹性固定治疗韧带损伤型Myerson B2型跖跗关节损伤可获得与Lisfranc螺钉固定相当的临床疗效,术后早期恢复更快,可避免二次手术取出内固定。

关键词： Lisfranc损伤螺钉固定弹性固定

Real-time observation of dynamic heterogeneity of gold nanorods on plasma membrane with darkfield microscopy

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Science China Chemistry 2019年第8期62卷 1072-1081页

作者： Feng Ge jianfeng xue Zonghua Wang Bin Xiong Yan He Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China Department of Chemistry Tsinghua UniversityBeijing 100084China State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringCollege of Biology Hunan UniversityChangsha 410082China

The plasma membrane possesses a complicated structure, on which the protein clusters are randomly but orderly distributed to maintain the regular morphology and function of cells. Investigating the detailed dynamic behaviors of nanoparticles(NPs) on cytomembrane is of great importance to understand cellular mechanisms and advance the bio-nano technologies for drug delivery, photothermal therapy, immunotherapy, etc. In this work, to study the dynamic heterogeneous interactions between NPs and cell membrane with high resolution, we established a simple method to efficiently track the translational and rotational diffusion of individual gold nanorods(AuNRs) on cell membranes. This method is based on that an anisotropic AuNR appears as a colored spot under a darkfield microscope(DFM) equipped with a color camera. While obtaining its lateral position, the polar angle of the AuNR can be calculated simultaneously from intensity difference between the R and G channels. Careful analysis shows that the lateral motion of single AuNRs do not follow normal Brownian diffusion, which could be attributed to their hop diffusion in the dynamically varying picket-fence structure of the live cell membrane. Furthermore, 4 different rotationtranslation patterns of the AuNR are observed due to spatiotemporal heterogeneity of the cytomembrane. This simple but robust method for simultaneously obtaining the location and orientation of anisotropic plasmonic nanoparticles could be further applied to the analysis of complicated biological and biomedical processes.

关键词： single particle tracking gold nanorods nanoparticle cell interaction darkfield microscopy

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“六减六增”优化金融营商环境

中国金融 2022年第18期 91-92页

作者：薛建峰中国人民银行西宁中心支行

近年来,人民银行西宁中心支行(以下简称“西宁中支”)根据党中央、国务院关于优化营商环境的决策部署,对标新时期高质量发展新要求和建设“六个现代化新青海”的奋斗目标,围绕“六减六增”狠抓金融营商环境建设,持续改善辖内长期存在的... 详细信息

近年来,人民银行西宁中心支行(以下简称“西宁中支”)根据党中央、国务院关于优化营商环境的决策部署,对标新时期高质量发展新要求和建设“六个现代化新青海”的奋斗目标,围绕“六减六增”狠抓金融营商环境建设,持续改善辖内长期存在的融资“慢、贵、难”问题,全力支持青海经济高质量发展。

关键词：营商环境青海经济持续改善高质量发展融资决策部署金融新青海