检索结果-南通市图书馆

Influence of laser parameters on the microstructures and surface properties in laser surface modification of biomedical magnesium alloys

引用

Journal of Magnesium and Alloys 2024年第1期12卷 72-97页

作者： Chee ying Tan Cuie wen Hua qian Ang School of Engineering RMIT UniversityMelbourneVictoria 3001Australia

Biodegradable implants from magnesium(Mg)alloys have emerged in the biomedical field especially in the orthopedic and cardiovascular stent applications owing to their low density,high specific strength,excellent machinability,good biocompatibility,and *** primary shortcoming of Mg-based implants is their low corrosion resistance in the physiological environment,which results in premature mechanical integrity loss before adequate healing and the production of excessive hydrogen gas,which is harmful to the body tissues and negatively affects the biocompatibility of the *** surface modification has recently received attention because it can improve the surface properties such as surface chemistry,roughness,topography,corrosion resistance,wear resistance,hydrophilicity,and thus cell response to the surface of the *** composition and microstructures including textures and phases of laser-treated surfaces depend largely on the laser processing parameters(input laser power,laser scan velocity,frequency,pulse duration,pressure,gas circulation,working time,spot size,beam focal position,and laser track overlap)and the thermophysical properties of the substrate(solubility,melting point,and boiling point).This review investigates the impacts of various laser surface modification techniques including laser surface melting,laser surface alloying,laser cladding,laser surface texturing,and laser shock peening,and highlights their significance in improving the surface properties of biodegradable Mg alloys for implant ***,we explore how different laser process parameters affect its composition,microstructure,and surface properties in each laser surface modification technique.

关键词： Biocompatibility Biodegradability Corrosion Implant applications Laser surface modification Magnesium alloys

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

机载定向能武器发展趋势及关键技术研究

引用

激光与红外 2024年第9期54卷 1346-1351页

作者：杜梓冰汤恒仁李泱张旭霞温颖倩潘翔宇刘昊天中国飞试验研究院陕西西安710089 西北工业大学陕西西安710029

为应对机载定向能武器对空战的影响,需科学研判其发展状态。首先研究了机载定向能武器的基本概念、作战应用场景、优缺点,分析了国外主要机载高能激光、高功率微波武器发展概况,然后对国外在定向能武器发展方面的主要做法进行研究。国... 详细信息

为应对机载定向能武器对空战的影响,需科学研判其发展状态。首先研究了机载定向能武器的基本概念、作战应用场景、优缺点,分析了国外主要机载高能激光、高功率微波武器发展概况,然后对国外在定向能武器发展方面的主要做法进行研究。国外通过前瞻布局、建立完善管理机构、持续投入、重视配套试验设施建设等方式快速推进机载定向能武器的发展,而机载高能激光武器将是最先实现装备的定向能武器,机载高功率微波武器在短期内的主要形式仍是作为导弹、炸弹的战斗部。机载定向能武器应尽早开展装机试验,持续攻克小型化、高功重比、高效环控、电磁兼容防护等难题,突破作战使用方式、总体设计集成、试验平台构建、试验评估等关键技术,并持续投入、长远布局协同发展、重视通用空中试验平台的建设,加大探索性飞行试验,通过不断的试验促进技术的逐步成熟。

关键词：机载定向能武器高能激光武器试验技术试验机平台飞行试验

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Development of a reversed dispersive based graphene functionalized with multiwalled carbon nanotubes for detection ofβ2-agonists in pork by high-performance liquid chromatography

引用

Food Science and Human Wellness 2018年第2期7卷 163-169页

作者： ying-wen qian Xia Hong Cai-Xia Yuan Xin-Kui Zhou Hai-Ning He Dong-Shuai Wang Quality and Safety Technological Innovation Service Platform on Circulation of Animal Origin Gansu Institute of Business and TechnologyLanzhouGansu 730010China Key Laboratory of Animal Products Safety Analysis and Detection Technology of Gansu Province LanzhouGansu 730010China

A reliable and inexpensive pretreatment procedure in the determination ofβ2-agonists in pork was *** procedure used a nanocomposite of multiwalled carbon nanotubes(CNTs)functionalized with graphene(rGO)as the reversed dispersive *** was analyzed after purification by highperformance liquid chromatography,the extraction time and the properties of the nanocomposite were *** optimized conditions,present method has linear response over concentration range of 0.5–50 ng/mL in pork samples with a satisfactory detection limit close to 0.1 ng/*** precisions of the current method(coefficient of variation)are lower than 5%,while recoveries are more than 98.3%.The nanocomposite exhibited high adsorptivity,long-term storage stability,satisfactory anti-interfering activity and high selectivity toward2-agonists compared with those of rGO and CNTs.

关键词： High-performance liquid chromatography Graphene Multiwalled carbon nanotube Ractopamine Salbutamol

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of dry eye disease symptomatology and mental health status among patients with different COVID-19 statuses

引用

International Journal of Ophthalmology(English edition) 2024年第5期17卷 822-830页

作者： Fang Ruan wen-Jun Kong qian Fan Hong-Wei Dong Wei Zhang wen-Bin Wei ying Jie Department of Ophthalmology Beijing You’an HospitalCapital Medical UniversityBeijing Infectious Eye Disease Diagnosis and Treatment CenterBeijing 100069China Beijing Tongren Eye Center Beijing Tongren HospitalCapital Medical UniversityBeijing Institute of OphthalmologyBeijing Ophthalmology and Visual Sciences Key LabBeijing 100730China Tianjin Eye Hospital Tianjin Key Lab of Ophthalmology and Visual ScienceTianjin Eye InstituteNankai University Affiliated Eye HospitalNankai University Eye InstituteNankai UniversityClinical College of OphthalmologyTianjin Medical UniversityTianjin 300020China

AIM:To evaluate dry eye disease(DED)symptomatology and mental health status in different COVID-19 ***:A cross-sectional observational design was *** 123 eligible adults(46.34%of men,age range,18-59y)with COVID-19 included in the study from August to November,*** Surface Disease Index(OSDI),Five-item Dry Eye Questionnaire(DEQ-5),Hospital Anxiety and Depression Scale(HADS),and Pittsburgh Sleep Quality Index(PSQI)were used in this ***:OSDI scores were 6.82(1.25,15.91)in asymptomatic carriers,7.35(2.50,18.38)in mild cases,and 16.67(4.43,28.04)in recurrent cases,with 30.00%,35.56%,and 57.89%,respectively evaluated as having DED symptoms(χ2=7.049,P=0.029).DEQ-5 score varied from 2.00(0,6.00)in asymptomatic carriers,3.00(0,8.00)in mild cases,and 8.00(5.00,10.00)in recurrent cases,with 27.50%,33.33%,and 55.26%,respectively assessed as having DED symptoms(χ2=8.532,P=0.014).The prevalence of clinical anxiety(50.00%)and depression(47.37%)symptoms were also significantly higher in patients with recurrent infection(χ2=24.541,P<0.001;χ2=30.871,P<0.001).Recurrent infection was a risk factor for high OSDI scores[odds ratio,2.562;95%confidence interval(CI),1.631-7.979;P=0.033]and DEQ-5 scores(odds ratio,3.353;95%CI,1.038-8.834;P=0.043),whereas having a fixed occupation was a protective factor for OSDI scores(odds ratio,0.088;95%CI,0.022-0.360;P=0.001)and DEQ-5 scores(odds ratio,0.126;95%CI,0.039-0.405;P=0.001).CONCLUSION:Patients with recurrent COVID-19 have more severe symptoms of DED,anxiety,and depression.

关键词： COVID-19 dry eye disease recurrent infection mental health

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Metabolic disorders in prediabetes:From mechanisms to therapeutic management

引用

World Journal of Diabetes 2024年第3期15卷 361-377页

作者： wen-Xin Ping Shan Hu Jing-qian Su Song-ying Ouyang Biomedical Research Center of South China College of Life SciencesFujian Normal UniversityFuzhou 350117Fujian ProvinceChina

Diabetes,one of the world's top ten diseases,is known for its high mortality and complication rates and low cure *** precedes the onset of diabetes,during which effective treatment can reduce diabetes *** risk factors include high-calorie and high-fat diets,sedentary lifestyles,and *** may include considerable damage to vital organs,including the retina,liver,and *** for treating prediabetes include a healthy lifestyle diet and pharmacological ***,while these options are effective in the short term,they may fail due to the difficulty of long-term *** may also be used to treat *** review examines prediabetic treatments,particularly metformin,glucagon-like peptide-1 receptor agonists,sodium glucose cotransporter 2 inhibitors,vitamin D,and herbal *** the remarkable impact of prediabetes on the progression of diabetes mellitus,it is crucial to intervene promptly and effectively to regulate ***,the current body of research on prediabetes is limited,and there is considerable confusion surrounding clinically relevant *** paper aims to provide a comprehensive summary of the pathogenesis of prediabetes mellitus and its associated therapeutic *** ultimate goal is to facilitate the clinical utilization of medications and achieve efficient and timely control of diabetes mellitus.

关键词： Prediabetes Glucagon-like peptide agonists Sodium–glucose cotransporter 2 inhibitors Vitamin D Chinese herbal medicines

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Amlodipine inhibits the proliferation and migration of esophageal carcinoma cells through the induction of endoplasmic reticulum stress

引用

World Journal of Gastroenterology 2024年第4期30卷 367-380页

作者： Yan-Min Chen wen-qian Yang Cheng-Wei Gu ying-ying Fan Yu-Zhen Liu Bao-Sheng Zhao Department of Thoracic Surgery The First Affiliated Hospital of Xinxiang Medical UniversityWeihui 453100Henan ProvinceChina Department of Oncology The Affiliated HospitalHenan Polytechnic UniversityJiaozuo 454000Henan ProvinceChina Life Science Research Center The First Affiliated Hospital of Xinxiang Medical UniversityWeihui 453100Henan ProvinceChina Department of Gastroenterology The First Affiliated Hospital of Xinxiang Medical UniversityWeihui 453100Henan ProvinceChina

BACKGROUND L-type calcium channels are the only protein channels sensitive to calcium channel blockers,and are expressed in various cancer *** Cancer Genome Atlas database shows that the mRNA levels of multiple L-type calcium channel subunits in esophageal squamous cell carcinoma tumor tissue are significantly higher than those in normal esophageal epithelial ***,we hypothesized that amlodipine,a long-acting dihydropyridine L-type calcium channel blocker,may inhibit the occurrence and development of esophageal cancer(EC).AIM To investigate the inhibitory effects of amlodipine on EC through endoplasmic reticulum(ER)*** Cav1.3 protein expression levels in 50 pairs of EC tissues and corresponding paracancerous tissues were ***,the inhibitory effects of amlodipine on proliferation and migration of EC cells in vitro were detected using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide and Transwell *** vivo experiments were performed using murine xenograft *** elucidate the underlying mechanisms,in vitro cell studies were performed to confirm that ER stress plays a role in inhibition proliferation and migration of EC cells treated with *** The expression level of Cav1.3 in esophageal carcinoma was 1.6 times higher than that in paracancerous *** treatment decreased the viability of esophageal carcinoma cells in a dose-and time-dependent *** vivo animal experiments also clearly indicated that amlodipine inhibited the growth of EC tumors in ***,amlodipine reduces the migration of tumor cells by inhibiting epithelial-mesenchymal transition(EMT).Mechanistic studies have demonstrated that amlodipine induces ER stress-mediated apoptosis and suppresses ***,amlodipine-induced autophagy was characterized by an increase in autophagy lysosomes and the accumulation of light chain 3B *** combination of amlodipine with the ER stress inhibitor 4-p

关键词： L-type calcium channel Amlodipine Esophageal cancer Autophagy Endoplasmic reticulum stress

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Weakly Approximate Diagonalization of Homomorphisms into Finite von Neumann Algebras

引用

Acta Mathematica Sinica,English Series 2024年第9期40卷 2187-2194页

作者： wen Hua qian Jun Hao SHEN wen Ming WU School of Mathematical Sciences Chongqing Normal UniversityChongqing 401331P.R.China Department of Mathematics and Statistics University of New HampshireDurhamNH 03824USA

Let A be a unital C^(∗)-algebra and B a unital C^(∗)-algebra with a faithful traceτ.Let n be a positive *** give the definition of weakly approximate diagonalization(with respect toτ)of a unital homomorphismφ:A→Mn(B).We give an equivalent characterization of McDuff Ⅱ_(1) *** show that,if A is a unital nuclear C^(∗)-algebra and B is a type Ⅱ_(1) factor with faithful traceτ,then every unital^(∗)-homomorphism φ:A→M_(n)(B)is weakly approximately *** B is a unital simple infinite dimensional separable nuclear C^(∗)-algebra,then any finitely many elements in Mn(B)can be simultaneously weakly approximately diagonalized while the elements in the diagonals can be required to be the same.

关键词： Weakly approximately diagonalizable McDuff factors nuclear hyperfinite

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hierarchical vectorization for facial images

引用

Computational Visual Media 2024年第1期10卷 97-118页

作者： qian Fu Linlin Liu Fei Hou ying He School of Computer Science and Engineering Nanyang Technological University639798SingaporeSingapore Data61 Commonwealth Scientific and Industrial Research OrganisationSydney2015Australia Interdisciplinary Graduate School Nanyang Technological University and Alibaba Group639798SingaporeSingapore State Key Laboratory of Computer Science Institute of SoftwareChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

The explosive growth of social media means portrait editing and retouching are in high *** portraits are commonly captured and stored as raster images,editing raster images is non-trivial and requires the user to be highly *** at developing intuitive and easy-to-use portrait editing tools,we propose a novel vectorization method that can automatically convert raster images into a 3-tier hierarchical *** base layer consists of a set of sparse diffusion curves(DCs)which characterize salient geometric features and low-frequency colors,providing a means for semantic color transfer and facial expression *** middle level encodes specular highlights and shadows as large,editable Poisson regions(PRs)and allows the user to directly adjust illumination by tuning the strength and changing the shapes of *** top level contains two types of pixel-sized PRs for high-frequency residuals and fine details such as pimples and *** train a deep generative model that can produce high-frequency residuals *** to the inherent meaning in vector primitives,editing portraits becomes easy and *** particular,our method supports color transfer,facial expression editing,highlight and shadow editing,and automatic *** quantitatively evaluate the results,we extend the commonly used FLIP metric(which measures color and feature differences between two images)to consider *** new metric,illumination-sensitive FLIP,can effectively capture salient changes in color transfer results,and is more consistent with human perception than FLIP and other quality measures for portrait *** evaluate our method on the FFHQR dataset and show it to be effective for common portrait editing tasks,such as retouching,light editing,color transfer,and expression editing.

关键词： face editing vectorization Poisson editing color transfer illumination editing expression editing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

DDI-Transform:A neural network for predicting drug-drug interaction events

引用

Quantitative Biology 2024年第2期12卷 155-163页

作者： Jiaming Su ying qian School of Computer Science and Technology Shanghai Frontiers Science Center of Molecule Intelligent SynthesesEast China Normal UniversityShanghaiChina

Drug-drug interaction(DDI)event prediction is a challenging problem,and accurate prediction of DDI events is critical to patient health and new drug ***,many machine learning-based techniques have been proposed for predicting DDI ***,most of the existing methods do not effectively integrate the multidimensional features of drugs and provide poor mitigation of noise to get effective feature *** address these limitations,we propose a DDI-Transform neural network framework for DDI event *** DDI-Transform,we design a drug structure information feature extraction module and a drug bind-protein feature extraction module to obtain multidimensional feature information.A stack of DDI-Transform layers in the DDI-Transform network module are then used for adaptive learning,thus adaptively selecting the effective feature information for *** results show that DDI-Transform can accurately predict DDI events and outperform the state-of-the-art *** on different scale datasets confirm the robustness of the method.

关键词： adaptive learning graph convolutional networks interaction prediction meta-path

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Heterostructure:application of absorption-catalytic center in lithium-sulfur batteries

引用

Rare Metals 2024年第4期43卷 1461-1487页

作者： Fei Wang Chun-Man Yang Yong-Qi Wang Dan You wen-Hao Yang Rong-Wei Huang Ji-Yue Hou qian Wang ying-Jie Zhang ying Wang Yue-Jing Zeng Yi-Yong Zhang Xue Li National Local Joint Engineering Research Center for Lithium-Ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Batteries Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming650093China College of Electrical Information Engineering Panzhihua UniversityPanzhihua617000China State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Centre of Chemistry for Energy MaterialsState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China

Due to the high theoretical specific capacity(1675 mAh·g^(-1)),low cost,and high safety of the sulfur cathodes,they are expected to be one of the most promising rivals for a new generation of energy storage ***,the shuttle effect,low conductivity of sulfur and its discharge products,volume expansion,and other factors hinder the commercialization of lithium-sulfur batteries(LSBs).The development of sulfur-fixing materials and the design of multifunctional materials to enhance the electrochemical performance of LSBs have been the main research priorities in recent *** of the advantages of high conductivity,built-in electric field,and good synergism,more and more researchers have employed heterostructure into sulfur-fixing materials to enhance the catalytic and absorption ability for *** this review,the principle of heterostructure and the mechanism of enhancing the performance of lithium-sulfur batteries are *** applications of heterostructure in cathode and interlayer of LSBs in the latest years are ***,the cutting-edge troubles and possibilities of heterostructures in LSBs are briefly presented.

关键词： Lithium-sulfur batteries(LSBs) Heterostructure Built-in electric field Catalytic Absorption

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：