检索结果-南通市图书馆

Theoretical & Applied Mechanics Letters 2023年第2期13卷 89-92页

作者： di liu Shen Xu Jinzhong Ma School of Mathematics Sciences Shanxi University030006TaiyuanShanxiChina

In this paper,the approximate Bayesian computation combines the particle swarm optimization and se-quential Monte Carlo methods,which identify the parameters of the Mathieu-van der Pol-Duffing chaotic energy harvester *** the proposed method is applied to estimate the coefficients of the chaotic model and the response output paths of the identified coefficients compared with the observed,which verifies the effectiveness of the proposed ***,a partial response sample of the regular and chaotic responses,determined by the maximum Lyapunov exponent,is applied to detect whether chaotic motion occurs in them by a 0-1 *** paper can provide a reference for data-based parameter iden-tification and chaotic prediction of chaotic vibration energy harvester systems.

关键词： Vibration energy harvester Approximate Bayesian computation 0–1 test Parameter identification Chaotic prediction

Fast secondary relaxation and plasticity initiation in metallic glasses

在线全文

学校读者我要写书评

暂无评论

National Science Review 2018年第5期5卷 616-618页

作者： Ji Chao Qiao Xiao di liu Qing Wang Chain Tsuan liu Jian Lu Yong Yang School of Mechanics and Civil & Architecture Northwestern Polytechnic University Centre for Advanced Structural Materials Department of Mechanical and Biomedical EngineeringCity University of Hong Kong Laboratory for Structures Institute of MaterialsShanghai University

Metallic glasses (MGs) are a promising engineering material with superb strength. However, their ‘Achilles’ heel’is their poor ductility in ambient conditions, particularly under tension. Unlike their crystalline c... 详细信息

关键词： MG Fast secondary relaxation and plasticity initiation in metallic glasses

Genome-wide DNA methylation and mRNA transcription analysis revealed aberrant gene regulation pathways in patients with dermatomyositis and polymyositis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中华医学杂志(英文版) 2025年第1期

作者： Luo Hui Zhu Honglin Bao ding Xiao Yizhi Zhou Bin Xiao Gong Zhang Lihua Gao Siming Li Liya liu Yangtengyu liu di Wu Junjiao Meng Qiming Meng Meng Chen Tao Zuo Xiaoxia Li Quanzhen Zhang Huali Department of Rheumatology and Immunology Xiangya Hospital Central South University Changsha Hunan China National Clinical Research Center for Geriatric disorders Xiangya Hospital Central South University Changsha Hunan China Provincial Clinical Research Center for Rheumatic and Immunologic diseases Xiangya Hospital Changsha Hunan China Microarray and Immune Phenotyping Core Facility University of Texas Southwestern Medical Center Dallas TX USA Department of Pathophysiology Xiangya School of Medicine Central South University Changsha Hunan China

Study on the relation between damage and permeability of sandstone at depth under cyclic loading

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2019年第4期6卷 479-492页

作者： Yang Zhao Hongwei Zhou Jiangcheng Zhong di liu School of Mechanics and Civil Engineering China University of Mining and TechnologyBeijing 100083People's Republic of China Mine Safety Technology Branch of China Coal Research Institute Beijing 100013People's Republic of China School of Energy and Mining Engineering China University of Mining and TechnologyBeijing 100083People's Republic of China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyBeijing 100083People's Republic of China School of Aerospace Engineering Tsinghua UniversityBeijing 100084People's Republic of China

The damage and permeability evolution of rock under stress is of great significance to engineering *** this paper,the evolution law of rock damage and permeability is studied by means of acoustic emission (AE) seepage experiment on deep roof sandstone with cyclic *** of damage uses the changes in acoustic emission fractal characteristics and compression parameter which based on elastic *** experimental results show that the AE events has fractal characteristic,in which the AE b-value and correlation dimension can represent the damage of *** the fractal characteristic value of AE increases,it indicates that the rock is in the compaction stage and the damage is not *** the fractal characteristic value of AE drops,it indicates that the rock was damaged,and the *** the cyclic load increasing step by step,the elastic modulus first increases and then *** compression parameter C to characterize the state of compaction and damage,it is obtained that the rock damage state and hydrostatic permeability show a power law function relationship with porosity and have the same *** compression parameter is less than zero,the evolution law of permeability and damage can be described by functional relationship between hydrostatic permeability K and compression parameter C.

关键词： Deep roof sandstone Cyclic loading Acoustic emission Permeability

Vitrectomy, lensectomy and silicone oil tamponade in the management of retinal detachment associated with choroidal detachment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2013年第3期6卷 337-341页

作者： Jun-Min Gui Li Jia Lei liu Jian-di liu Chongqing Aier-Mega Eye Hospital Chongqing Aier Eye Hospital

AIM: To report the results of combined vitrectomy, lensectomy and silicone oil (SO) tamponade in treating primary rhegmatogenous retinal detachment (RRD) associated with choroidal detachment (CD). · METHODS: A retrospective, consecutive and case series study of 21 subjects with concurrent RRD associated with CD was conducted. All subjects underwent a standard three -port 20G pars plana vitrectomy (PPV) with lensectomy and silicone oil tamponade. Mean follow -up time was 8 months (rang from 4 to 19 months). The primary and final anatomic success rate, visual acuity and final intraocular pressure (IOP) were recorded and analyzed. ·RESULTS: Of 21 subjects, 8 were women and 13 were men. Age at presentation ranged from 22 to 75 years (mean 57.4 years). The presenting vision ranged from light perception to 0.15. The initial IOP ranged from 3mmHg to 12mmHg (mean 6.2mmHg). All eyes were phakic except one pseudophakic. No intraocular lens was implanted during the primary surgical intervention. Fifteen of 21 (71.4%) eyes had retina reattached after one operation. Six eyes had recurrent inferior retinal detachment due to proliferation. Five of them were successfully reattached after one or more additional operations. Mean IOP at final follow -up was 15.2mmHg (range from 8mmHg to 20mmHg). One case declined for further operation. The final reattachment rate was 95.2%. Visual acuity improved in 19 (90.5%) eyes, was unchanged in 1 (4.8%) eye and decreased in 1 (4.8%) eye.·CONCLUSION: Combination of vitrectomy, lensectomy and silicone tamponade is an effective method in treating RRD associated with CD, reducing the incidence of postoperative hypotony.

关键词： choroidal detachment lensectomy rhegamatogenous retinal detachment vitrectomy silicone oil

A Mass Transfer-Enhanced Pyrolysis-Free Bifunctional Catalyst to Boost Ultralong Lifespan Zinc-Air Batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Material Advances 2023年第1期4卷 467-473页

作者： Tengge Chen di liu Xueli Li Mengqing Shi Zhonghua Xiang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029PR China

The development of efficient and low-cost bifunctional oxygen catalysts is essential yet a challenge for zinc-air batteries(ZABs).Here,we prepared a pyrolysis-free 3-dimensional hybrid catalyst(COP-Fe@3DLDH)with bifunctional oxygen-catalytic activity by integrating layered double hydroxides(3D-LDH)and a fully conjugated iron phthalocyanine-based covalent organic polymer(COP-Fe).More hierarchically porous and larger specific surface area(170.4 m^(2) g^(−1))can effectively enhance the mass transfer process and active site exposure of cathode,allowing COP-Fe@3D-LDH to exhibit an outstanding peak power density(148.5 mW cm^(-2))and an ultralong lifespan(over 400 h at 10 mA cm^(-2))in ***,this work provides a new perspective to enhance the performance of pyrolysis-free catalysts in ZABs.

关键词： pyrolysis hydroxide integrating

A New Oviraptorid dinosaur (Theropoda: Oviraptorosauria) from the Late Cretaceous of Jiangxi Province, Southern China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2013年第4期87卷 899-904页

作者： WEI Xuefang PU Hanyong XU Li liu di Lü Junchang Institute of Geology Chinese Academy of Geological Sciences Henan Geological Museum

A new oviraptorid dinosaur Jiangxisaurus ganzhouensis gen. et sp. nov., is erected based on a partial skeleton from the Upper Cretaceous Nanxiong Formation of Ganzhou City, Jiangxi Province. The new taxon differs from other oviraptorids in the weakly downturned rostrum of the lower jaw, much-elongated mandible with a height-to-length ratio being about 20% and the length ratio of radius to humerus of about 0.70. This species not only adds a new member to oviraptorid dinosaurs, but also provides more information about oviraptorid paleogeographical distribution in southern China.

关键词： Oviraptoridae Jiangxisaurus Nanxiong Formation Upper Cretaceous Ganzhou Basin,Jiangxi Province

Modification of Titanium Surfaces via Surface-initiated Atom Transfer Radical Polymerization to Graft PEG-RGD Polymer Brushes to Inhibit Bacterial Adhesion and Promote Osteoblast Cell Attachment

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2017年第5期32卷 1225-1231页

作者：陈琦 liu di GONG Yuejiao XIAO Qun 李志安 Key Laboratory for Oral Biomedical Engineering of the Ministry of Education School of Stomatology Wuhan University Wuhan 430079 China

Implant-related infection is one of the key concerns in clinical medicine, so the modification of titanium to inhibit bacterial adhesion and support osteoblast cell attachment is important. In this article, two strategies were used to examine the above effects. First, modification of titanium via surface-initiated atom transfer radical polymerization（ATRP） was performed. The surface of the titanium was activated initially by a silane coupling agent. Well-defined polymer brushes of poly（ethylene glycol） methacrylate were successfully tethered on the silane-coupled titanium surface to form hydration shell to examine the anti-fouling effect. Second, functionalization of the Ti-PEG surface with RGD was performed to examine the anti-bacterial adhesion and osteoblast cell attachment ability. The chemical composition of modified titanium surfaces was characterized by X-ray photoelectron spectroscopy（XPS）. Changes in surface hydrophilicity and hydrophobicity were characterized by static water contact angle measurements. Results indicated that PEG-RGD brushes were successfully tethered on the titanium surface. And anti-bacterial adhesion ability and osteoblast cell attachment ability were confirmed by fluorescence microscopy and scanning electron microscopy. Results indicated that PEG can inhibit both bacterial adhesion and osteoblast cell attachment, while PEG-RGD brushes can not only inhibit bacterial adhesion but also promote osteoblast cell attachment.

关键词： modification of titanium ATRP anti-bacterial adhesion osteoblast cell attachment PEG RGD brushes

经胸锁乳突肌肌间入路与经颈白线入路手术治疗单侧甲状腺结节的对比研究

在线全文

学校读者我要写书评

暂无评论

临床医学 2025年第1期45卷 5-8页

作者：侯永强王新征柳笛河南科技大学第一附属医院甲状腺外科河南洛阳471000

目的比较经胸锁乳突肌肌间入路(SMIA)与经颈白线入路(LACA)手术治疗单侧甲状腺结节的应用效果。方法选择2019年1月至2021年12月河南科技大学第一附属医院收治的102例单侧甲状腺结节患者为研究对象。依照随机数字表法划分成SMIA组与LACA... 详细信息

目的比较经胸锁乳突肌肌间入路(SMIA)与经颈白线入路(LACA)手术治疗单侧甲状腺结节的应用效果。方法选择2019年1月至2021年12月河南科技大学第一附属医院收治的102例单侧甲状腺结节患者为研究对象。依照随机数字表法划分成SMIA组与LACA组,每组51例。LACA组采用LACA手术治疗,SMIA组采用SMIA手术治疗。对比两组围术期指标、疼痛程度[视觉模拟评分法(VAS)]、颈前区不适感及并发症发生率。结果与LACA组相比,SMIA组术中出血量、引流量少,且住院天数短,手术切口长度小(P<0.05)。术后6、12、24、72 h与LACA组相比,SMIA组VAS评分较低(P<0.05);术后1 d、1周、1个月与LACA组相比,SMIA组颈前区不适感评分较低(P<0.05)。SMIA组并发症发生率[3.92%(2/51)]较LACA组[19.61%(10/51)]低(P<0.05)。结论与LACA手术治疗相比,SMIA手术治疗单侧甲状腺结节能减轻手术创伤,降低疼痛感及颈前部不适感,且其能减少并发症的发生。

关键词：单侧甲状腺结节经胸锁乳突肌肌间入路经颈白线入路

Rapid Recovery in COVID-19 Patients with Chronic Hepatitis B Virus Infection Treated with Tenofovir disoproxil Fumarate

在线全文

学校读者我要写书评

暂无评论

Journal of Clinical and Translational Hepatology 2021年第2期9卷 269-273页

作者： Xiliu Chen di liu Dongliang Yang Xin Zheng Department of Infectious diseases Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubeiChina Joint International Laboratory of Infection and Immunity Huazhong University of Science and TechnologyWuhanHubeiChina Pritzker School of Medicine University of ChicagoChicagoILUSA

The coronavirus disease 2019(COVID-19)pandemic continues *** report here two cases of chronic hepatitis B patients with acute respiratory syndrome coronavirus 2 infection treated with tenofovir disoproxil fumarate who demonstrated a favorable *** report adds some evidence that concurrent HBV infection may not worsen COVID-19 infection and tenofovir disoproxil fumarate treatment may have partial positive effect on COVID-19 rapid recovery.

关键词： COVID-19 SARS-CoV-2 Chronic hepatitis B Tenofovir disoproxil fumarate