检索结果-南通市图书馆

Surface modifications of biometallic commercially pure Ti and Ti–13Nb–13Zr alloy by picosecond Nd:YAG laser

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 Minerals,Metallurgy and Materials 2021年第2期28卷 285-295页

作者： Slađana Laketić Marko Rakin milošmomčilović Jovan Ciganović Đorđe Veljović Ivana Cvijović-Alagić Vinča Institute of Nuclear Sciences University of BelgradeP.O.Box 52211001 BelgradeSerbia Faculty of Technology and Metallurgy University of BelgradeKarnegijeva 411120 BelgradeSerbia

The effects of picosecond Nd:YAG laser irradiation on chemical and morphological surface characteristics of the commercially pure titanium and Ti–13Nb–13Zr alloy in air and argon atmospheres were studied under different laser output energy *** the interaction of laser irradiation with the investigated materials,a part of the energy was absorbed on the target surface,influencing surface *** beam interaction with the target surface resulted in various morphological alterations,resulting in crater formation and the presence of microcracks and hydrodynamic ***,different chemical changes were induced on the target materials’surfaces,resulting in the titanium oxide formation in the irradiation-affected area and consequently increasing the irradiation energy *** the high energy absorption at the site of interaction,the dimensions of the surface damaged area ***,surface roughness *** appearance of surface oxides also led to the increased material hardness in the surface-modified *** chemical and morphological changes were pronounced after laser irradiation of the Ti–13Nb–13Zr alloy surface.

关键词： commercially pure titanium Ti-13Nb-13Zr alloy surface modification Nd:YAG laser laser-induced damage hard oxidized surface

维普期刊数据库

Laser processing effects on Ti−45Nb alloy surface,corrosive and biocompatible properties

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2024年第8期34卷 2533-2551页

作者： I.CVIJOVIĆ-ALAGIĆ S.LAKETIĆ M.momČiloviĆ J.CIGANOVIĆ Đ.VELJOVIĆ J.BAJAT V.KOJIĆ M.RAKIN Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia University of BelgradeP.O.Box 52211001 BelgradeSerbia Faculty of Technology and Metallurgy University of BelgradeKarnegijeva 411120 BelgradeSerbia Oncology Institute of Vojvodina Faculty of MedicineUniversity of Novi SadPut Dr Goldmana 421204 Sremska KamenicaSerbia

The Ti−45Nb(wt.%)alloy properties were investigated in relation to its potential biomedical *** surface modification was utilized to improve its performance in biological *** a result of the laser treatment,(Ti,Nb)O scale was formed and various morphological features appeared on the alloy *** electrochemical behavior of Ti−45Nb alloy in simulated body conditions was evaluated and showed that the alloy was highly resistant to corrosion deterioration regardless of additional laser surface modification ***,the improved corrosion resistance after laser treatment was evident(the corrosion current density of the alloy before laser irradiation was 2.84×10^(−8)A/cm^(2),while that after laser treatment with 5 mJ was 0.65×10^(−8)A/cm^(2))and ascribed to the rapid formation of a complex and passivating bi-modal surface oxide *** cytotoxicity and effects of the Ti−45Nb alloy laser surface modification on the MRC-5 cell viability,morphology,and proliferation were also *** Ti−45Nb alloy showed no cytotoxic ***,cells showed improved viability and adherence to the alloy surface after the laser irradiation *** highest average cell viability of 115.37%was attained for the alloy laser-irradiated with 15 *** showed that the laser surface modification can be successfully utilized to significantly improve alloy performance in a biological environment.

关键词： Ti−45Nb alloy laser surface scanning electrochemical properties biocompatibility cell morphology

维普期刊数据库

同方期刊数据库

A Methodology for Vulnerability Assessment of Cultural Heritage in Extreme Climate Changes

在线全文

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2024年第3期15卷 404-420页

作者： Riccardo Cacciotti Alessandro Sardella milo? Drdácky Alessandra Bonazza Institute of Theoretical and Applied Mechanics Czech Academy of Sciences Institute of Atmospheric Sciences and Climate National Research Council of Italy Department of Environmental and Prevention Sciences University of Ferrara Istituto Superiore per la Protezione e la Ricerca Ambientale

Vulnerability evaluation plays a key role in risk assessment and reduction and is essential for defining strategies for climate change adaptation and mitigation. In dealing with the safeguarding of cultural heritage at risk, we are still far from adopting and applying an agreed methodology for vulnerability assessment. With the aim to support practitioners, heritage managers,and policy and decision makers to undertake actions that address the protection of cultural heritage at risk, the methodology set up in the framework of the Interreg Central Europe STRENCH is illustrated and discussed here. Based on three major requirements(susceptibility, exposure, and resilience) and a continuous consultation with local stakeholders, the proposed methodology is applicable for evaluating the vulnerability of built heritage and cultural landscape exposed to hydrometeorological hazards, such as heavy rains, floods, and droughts. The results obtained through its validation on 15 case studies from seven Central European regions are shown to underline the strengths and limitations of the methodological *** consultation with local stakeholders was fundamental for the definition of the criteria/subcriteria and related values for the assessment of the requirements. Application to further sites in other contexts would surely contribute to strengthening the reliability of the methodological approach.

关键词： Built and natural heritage Exposure Heritage vulnerability Resilience Risk management Susceptibility

The Islamic Religion in Course Curriculums of High School History Textbooks in the Republic of Macedonia

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Cultural and Religious Studies 2024年第4期12卷 210-223页

作者： Zećir Ramčilović Ss Cyril and Methodius University SkopjeRepublic of Macedonia

History textbooks can and primarily should contribute to the strengthening of students’awareness of universal human ***,history textbooks can also deepen the divisions,prejudices,and uncritical attitudes,contrary to the goals of *** youth population,which is still building and creating their point of view towards the world is the main group in the education *** learning period,in the elementary,as well as in the secondary education is of utmost importance for the development of every *** that end,history,through the contents of the past largely shapes our perceptions of every individual,ourselves,and the *** we are living in a multiethnic and multi-confessional society,I have decided to conduct an analysis of the teaching contents of high school textbooks related to *** reason for the analysis is the role of religion in the formation of Balkan nations,which have made it one of the key elements of their national *** is often given the role of raising and strengthening the national awareness,patriotism,as well as the country homogeneity,which most often leads to forming prejudices,divisions,and discrimination towards people of minority *** large volume of content related to the religion,and also the mere fact that Muslims are the second largest religion group in the population,I have decided to analyze the contents which are related only to the Islamic *** goal is to look for both the positive and negative sides of those contents in history textbooks in secondary schools,which are backed by state institutions that are supposed to take care of the development of competitive,creative,progressive,and ethically formed human *** critical review will give an additional impulse to the efforts of eliminating those parts of the teaching contents that create divisions and prejudices,especially in history textbooks,so that its studying can become the key factor in the building of trust

关键词： Islam religion students history textbooks education

Rock Mass Quality Rating Based on the Multi-Criteria Grey Metric Space

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第9期140卷 2635-2664页

作者： miloš Gligoric Zoran Gligoric Saša Jovanovic Suzana Lutovac Dragan Pamucar Ivan Jankovic Faculty of Mining and Geology University of BelgradeBelgrade11000Serbia Faculty of Technical Sciences University of PrištinaKosovska Mitrovica38220Serbia Department of Operations Research and Statistics Faculty of Organizational SciencesUniversity of BelgradeBelgrade11000Serbia College of Engineering Yuan Ze UniversityTaoyuan City320315TaiwanChina

Assessment of rock mass quality significantly impacts the design and construction of underground and open-pit mines from the point of stability and *** study develops the novel Gromov-Hausdorff distance for rock quality(GHDQR)methodology for rock mass quality rating based on multi-criteria grey metric *** usually presents the quality of surrounding rock by classes(metric spaces)with specified properties and adequate interval-grey *** the distance between surrounding rock sample characteristics and existing classes represents the core of this *** Gromov-Hausdorff distance is an especially useful discriminant function,i.e.,a classifier to calculate these distances,and assess the quality of the surrounding *** efficiency of the developed methodology is analyzed using the Mean Absolute Percentage Error(MAPE)*** existing methods,such as the Gaussian cloud method,Discriminant method,Mutation series method,Artificial neural network(ANN),Support vector machine(SVM),Grey wolf optimizer and Support vector classification method(GWO-SVC)and Rock mass rating method(RMR)are used for comparison with the proposed GHDQR *** share of the highly accurate category of 85.71%clearly indicates compliance with actual values obtained by the compared *** results of comparisons showed that the model enables objective,efficient,and reliable assessment of rock mass quality.

关键词： Rock mass rating multi-criteria class metric space interval-grey numbers

电化学促进的镍催化的α-氰基乙酸酯的α-芳基化反应

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电化学（中英文） 2024年第5期30卷 11-24页

作者：李子萌李章健 Anat milo 方萍梅天胜中国科学院上海有机化学研究所金属有机国家重点实验室中国科学院大学上海200032 四川师范大学化学与材料科学学院成都610068 本·古里安大学化学部贝尔谢巴841051

β-氨基酸在医药领域有着广泛的应用。本文利用镍催化的成对电解策略,发展了一种羰基α-芳基化反应,实现了α-芳基-α-氰基乙酸酯的合成。产物可通过简单还原制备α-芳基-β-氨基酸,具有极高的附加价值。在温和条件下,以缺电子芳基溴与... 详细信息

β-氨基酸在医药领域有着广泛的应用。本文利用镍催化的成对电解策略,发展了一种羰基α-芳基化反应,实现了α-芳基-α-氰基乙酸酯的合成。产物可通过简单还原制备α-芳基-β-氨基酸,具有极高的附加价值。在温和条件下,以缺电子芳基溴与α-氰基乙酸酯为底物,可以良好的收率获得目标产物,且具有较好的官能团兼容性。当芳基溴过于富电子时,目标产物发生自偶联。使用DFT计算了产物负离子的还原电势,表明了富电子芳基取代使产物还原电势降低,更易于在阳极发生氧化。通过电化学分析和机理实验,推测为烯醇负离子配体交换型机理而非自由基加成型机理。

关键词：有机电合成镍催化成对电解 α-芳基化 DFT计算

Outcomes of long-acting injectable antipsychotics use in pregnancy:A literature review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2024年第4期14卷 582-599页

作者： Ana V Pejčić Srdjan M Stefanović milošN milosavljević Vladimir S Janjić Marko M Folić Nevena D Folić Jovana Z milosavljević Department of Pharmacology and Toxicology Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Department of Pharmacy Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Department of Clinical Pharmacology University Clinical Center KragujevacKragujevac 34000Serbia Department of Psychiatry Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Clinic for Psychiatry University Clinical Center KragujevacKragujevac 34000Serbia Center for Pharmaceutical and Pharmacological Research Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Department of Pediatrics Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Pediatric Clinic University Clinical Center KragujevacKragujevac 34000Serbia Department of Anatomy Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia

BACKGROUND Women with a history of serious psychotic disorders are at increased risk of disease relapse during ***-acting injectable(LAI)antipsychotics have been widely used to improve adherence and prevent relapse in patients with various severe psychotic disorders,but there is a lack of high-quality data from previous research on the safety of LAI antipsychotics during *** To summarize relevant data on maternal,pregnancy,neonatal,and developmental outcomes from published cases of LAI antipsychotic use in *** A literature search was performed through November 11,2023,using three online databases:PubMed/MEDLINE,Scopus,and Web of *** reports or case series that reported information about the outcomes of pregnancy in women who used LAI antipsychotics at any point in pregnancy,with available full texts,were *** statistics,narrative summation,and tabulation of the extracted data were *** A total of 19 publications satisfied the inclusion criteria:3 case series,15 case reports,and 1 conference *** reported the outcomes of LAI antipsychotic use in 74 women and 77 *** use of secondgeneration LAI antipsychotics was reported in the majority(n=47;61.0%)of ***-generation LAI antipsychotics were administered during 30 pregnancies(39.0%).Most of the women(approximately 64%)had either satisfactory control of symptoms or no information about relapse,while approximately 12%of them had developed gestational diabetes mellitus.A minority of cases reported adverse outcomes such as stillbirth,spontaneous abortion,preterm birth,low birth weight,congenital anomalies,and neurological manifestations in ***,there were no reports of negative long-term developmental *** Currently available data seem reassuring,but further well-designed studies are required to properly evaluate the risks and benefits of LAI antipsychotic use during pregnancy.

关键词： Antipsychotic agents Long-acting injectable Pregnancy Outcome Review

Structural Integrity Assessment of Welded Pressure Vessel Produced of HSLA Steel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第S1期18卷 888-892页

作者： Milovi Ljubica Vuherer Tomaz Zrili milorad momilovi Dejan Jakovi Dragan Faculty of Technology and Metallurgy University of BelgradeKarnegijeva 411120 BelgradeSerbia Welding Laboratory University of MariborFaculty of Mechanical EngineeringSmetanova 17Maribor 2000Slovenia Institute for Testing of Materials IMS Blvd.vojvode Mi i a 4311000 BelgradeSerbia

Welded joint is a critical region of a welded *** operational safety of welded pressure equipment mostly depends on the behaviour of loaded *** of welded structure is dependent on the properties of welded joint as whole and of its constituents (parent metal,heat affected zone and weld metal).In this paper the behaviour of welded joint cracked constituents is *** integrity assessment procedure is applied to welded pressure vessel produced of high-strength low-alloyed steel,operating at-40°C,comparing crack driving force and material crack resistance,using path-independent contour J-integral as fracture mechanics *** comparison of crack driving force,expressed by J-integral and material resistant curve,J-R curve,provide the possibility to determine the extent of the stable crack as well as the critical crack size for its final fast propagation and also to assess the structural integrity of a cracked pressure vessel.

关键词： pressure vessel residual strength J integral crack driving force

维普期刊数据库

电化学促进的镍催化的α-氰基乙酸酯的α-芳基化反应（英文）

在线全文

学校读者我要写书评

暂无评论

电化学(中英文) 2024年第5期 14-27页

作者：李子萌李章健 Anat milo 方萍梅天胜中国科学院上海有机化学研究所金属有机国家重点实验室中国科学院大学四川师范大学化学与材料科学学院本·古里安大学化学部

关键词：有机电合成镍催化成对电解 α-芳基化 DFT计算