检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

四面体超晶格中高温铁磁半导体的预测

Science China Materials 2024年第4期67卷 1225-1230页

作者：王亚奇孙华胜吴世海李盎万逸阚二军黄呈熙 mit Key Laboratory of Semiconductor Microstructure and Quantum Sensing Nanjing University of Science and TechnologyNanjing 10094China

铁磁(FM)半导体兼具半导体(如逻辑器件)和磁性材料(如记忆存储器)的优点,半个多世纪以来一直受到广泛关注.然而,铁磁半导体的发展受到候选材料稀缺以及居里温度低的阻碍.铁磁性通常在具有八面体配位的过渡金属化合物中被发现.而具有较... 详细信息

铁磁(FM)半导体兼具半导体(如逻辑器件)和磁性材料(如记忆存储器)的优点,半个多世纪以来一直受到广泛关注.然而,铁磁半导体的发展受到候选材料稀缺以及居里温度低的阻碍.铁磁性通常在具有八面体配位的过渡金属化合物中被发现.而具有较小晶体场分裂和较弱反铁磁(AFM)直接交换的四面体配位化合物可能是高温铁磁体的潜在候选者,但很少被探索.在这项工作中,我们提出了高温铁磁半导体可以在四面体配位超晶格(SL)中实现.在第一性原理计算的基础上,我们系统地研究了一系列MX/TMX (MX表示12-16,13-15或14-14族四面体半导体,TM表示3d过渡金属,X表示配体)超晶格.其中,SiC/CrC SL是一种稳定的铁磁半导体材料,具有0.363 eV的间接带隙和~935 K的高居里温度.此外,我们还探讨了Cr原子层的分布和层间磁耦合,预测了单轴应变引起了反铁磁到铁磁的相变.这些发现为实现四面体配位超晶格的高温铁磁半导体在未来自旋电子应用中开辟了新的机会.

关键词：过渡金属化合物高居里温度自旋电子晶体场分裂超晶格逻辑器件八面体配位候选者

Exploring the potential of olivine-containing copper-nickel slag for carbon dioxide mineralization in cementitious materials

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 562-573页

作者： Qianqian Wang Zequn Yao Lijie Guo Xiaodong Shen College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing 211816China BGRIMM Technology group Beijing 100160China

Water-quenched copper-nickel metallurgical slag enriched with olivine minerals exhibits promising potential for the production of CO_(2)-mineralized cementitious *** this work,copper-nickel slag-based cementitious material(CNCM)was synthesized by using different chemical activation methods to enhance its hydration reactivity and CO_(2) mineralization *** water curing ages and carbonation conditions were explored related to their carbonation and mechanical properties ***,thermogravimetry differential scanning calorimetry and X-ray diffraction methods were applied to evaluate the CO_(2) adsorption amount and carbonation products of *** development of carbonated CNCM blocks was examined by backscattered electron imaging(BSE)with energy-dispersive X-ray *** showed that among the studied samples,the CNCM sample that was subjected to water curing for 3 d exhibited the highest CO_(2) sequestration amount of 8.51wt%at 80℃and 72 h while presenting the compressive strength of 39.07 *** result indicated that 1 t of this CNCM can sequester 85.1 kg of CO_(2) and exhibit high compressive *** the addition of citric acid did not improve strength development,it was beneficial to increase the CO_(2) diffusion and adsorption amount under the same carbonation conditions from BSE *** work provides guidance for synthesizing CO_(2)-mineralized cementitious materials using large amounts of metallurgical slags containing olivine minerals.

关键词： copper-nickel slag fayalite CO_(2)sequestration cementitious material admixtures carbonation conditions

Identification and elucidation of anthropogenic source contribution in PM_(10) pollutant: Insight gain from dispersion and receptor models

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2016年第10期28卷 69-78页

作者： Debananda Roy Gurdeep Singh Pankaj Yadav Dept. of Environmental Science & Engineering Marwadi Education Foundation & Group of Institutions Centre of Mining Environment /Department of Environmental Science & Engineering Indian School of Mines Dept. of Physics Marwadi Education Foundation & Group of Institutions

Source apportionment study of PM10 （Particulate Matter） in a critically polluted area of Jhafia coalfield, India has been carried out using Dispersion model, Principle Component Analysis （PCA） and Chemical Mass Balance （CMB） techniques. Dispersion model Atmospheric Dispersion Model （AERMOD） was introduced to simplify the complexity of sources in Jharia coalfield. PCA and CMB analysis indicates that monitoring stations near the mining area were mainly affected by the emission from open coal mining and its associated activities such as coal transportation, loading and unloading of coal. Mine fire emission also contributed a considerable amount of particulate matters in monitoring stations. Locations in the city area were mostly affected by vehicular, Liquid Petroleum Gas （LPG）＆ Diesel Generator （DG） set emissions, residential, and commercial activities. The experimental data sampling and their analysis could aid understanding how dispersion based model technique along with receptor model based concept can be strategically used for quantitative analysis of Natural and Anthropogenic sources of PM10.

关键词： Source apportionment PM10 PCAReceptor modelDispersion modelJharia coalfield

Cross-Modal Consistency with Aesthetic Similarity for Multimodal False Information Detection

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第5期79卷 2723-2741页

作者： Weijian Fan Ziwei Shi State Key Laboratory of Media Convergence and Communication Communication University of ChinaBeijing100024China Software Research Institute China United Network Communication Group Co.Ltd.Beijing100024China

With the explosive growth of false information on social media platforms, the automatic detection of multimodalfalse information has received increasing attention. Recent research has significantly contributed to multimodalinformation exchange and fusion, with many methods attempting to integrate unimodal features to generatemultimodal news representations. However, they still need to fully explore the hierarchical and complex semanticcorrelations between different modal contents, severely limiting their performance detecting multimodal falseinformation. This work proposes a two-stage detection framework for multimodal false information detection,called ASMFD, which is based on image aesthetic similarity to segment and explores the consistency andinconsistency features of images and texts. Specifically, we first use the Contrastive Language-Image Pre-training(CLIP) model to learn the relationship between text and images through label awareness and train an imageaesthetic attribute scorer using an aesthetic attribute dataset. Then, we calculate the aesthetic similarity betweenthe image and related images and use this similarity as a threshold to divide the multimodal correlation matrixinto consistency and inconsistencymatrices. Finally, the fusionmodule is designed to identify essential features fordetectingmultimodal false information. In extensive experiments on four datasets, the performance of the ASMFDis superior to state-of-the-art baseline methods.

关键词： Social media false information detection image aesthetic assessment cross-modal consistency

Construction and Validity of Chinese Translation of the Universal Mental Health Literacy Scale for Adolescents

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

International Journal of Mental Health Promotion 2024年第8期26卷 671-677页

作者： Qi Wang Qi Wang Yuxuan Ji Kexu Chen Kaiyun Li Fanlu Jia Ting Peng School of Education and Psychology University of JinanJinan250022China Psychology Research group Jinan Quanjing Middle SchoolJinan250024China

Background:In this study,the Universal Mental Health Literacy Scale for Adolescents(UMHL-A)was revised and tested for its reliability and validity in Chinese middle school students,thus establishing a useful tool for assessing the mental health of individuals in this ***:Our sample comprised 1208 junior high school students(58.85%male),aged between 11 and 15 years *** Chinese version of the scale includes a mental health attitude subscale and mental health knowledge subscale,including attitudes towards seeking help,attitudes related to stigma,general mental health knowledge,and knowledge about specific mental illnesses,encapsulated in a total of 17 items.A series of psychometric analyses such as exploratory factor analysis(EFA),confirmatory factor analysis(CFA),and internal consistency reliability estimation were carried out in this ***:The results of the CFA indicated that the two-factor model had an acceptable model fit(Attitude(UMHL-A Likert):χ^(2)/df=4.107;RMSEA=0.072;SRMR=0.045;TLI=0.932;CFI=0.954;Knowledge(UMHL-A T/F):χ^(2)/df=3.647;RMSEA=0.066;SRMR=0.044;TLI=0.923;CFI=0.945).The Cronbach’s alpha coefficient of subscales of the Chinese version UMHL-A were 0.80 and 0.78,***:In general,the Chinese version of the Universal Mental Health Literacy Scale for adolescents has good reliability and validity and can be used as a tool to measure the mental health literacy of Chinese adolescents.

关键词： Mental health literacy Chinese adolescents validity

Decrypting a path based approach for identifying the interplay between PI3K and GSK3 signaling cascade from the perspective of cancer

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

Genes & Diseases 2022年第4期9卷 868-888页

作者： Abhijit Das Barshana Bhattacharya Souvik Roy Department of Pharmacology NSHM Knowledge CampusKolkata-Group of InstitutionsKolkata 700053India

Cancer is one of those leading diseases worldwide, which takes millions of lives every year. Researchers are continuously looking for specific approaches to eradicate the deadly disease, ensuring minimal adverse effects along with more therapeutic significance. Targeting of different aberrantly regulated signaling pathways, involved in cancer, is surely one of the revolutionary chemotherapeutic approach. In this instance, GSK3 and PI3K signaling cascades are considered as important role player for both the oncogenic activation and inactivation which further leads to cancer proliferation and metastasis. In this review, we have discussed the potential role of GSK3 and PI3K signaling in cancer, and we further established the crosstalk between PI3K and GSK3 signaling, through showcasing their cross activation, cross inhibition and convergence pathways in association with cancer. We also exhibited the effect of GSK3 on the efficacy of PI3K inhibitors to overcome the drug resistance and preventing the cell proliferation, metastasis in a combinatorial way with GSK3 inhibitors for a better treatment strategy in clinical settings.

关键词： Cancer Chemotherapy Drug resistance GSK3 PI3K

Vapor-phase postsynthetic amination of hypercrosslinked polymers for efficient iodine capture

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

Chinese Chemical Letters 2024年第9期35卷 320-325页

作者： Pengcheng Su Shizheng Chen Zhihong Yang Ningning Zhong Chenzi Jiang Wanbin Li School of Materials and Chemical Engineering Anhui Jianzhu UniversityHefei 230026China School of Environment Jinan UniversityGuangzhou 511443China Jiangsu Environmental Protection group Nantong Co. Ltd.Nantong 226010China

Hypercrosslinked polymers(HCPs)with large surface areas,high intrinsic porosities and low production costs may be available platforms for iodine ***,the lack of iodine-philicity binding sites limits their adsorption *** we use vapor-phase postsynthetic amination strategy to introduce electron-donating amino groups into the prefabricated HCPs for enhancing their iodine capture *** simple vapor-phase exposure,the halogen-containing HCPs can be grafted by amines through nucleophilic substitution toward chloro *** with the abundant amino groups and high porosities,the amino-functionalized porous polymers show substantially increased iodine adsorption capacity,about 221%as that of original one,accompanied by excellent *** investigations reveal the key roles of the electron-donor amino groups andπ-conjugated benzene rings along with structure characteristics of porous polymer frameworks in iodine ***,this vapor-phase amination strategy shows good generality and can be extended to various amines,e.g.,ethylenediamine,1,3-diaminopropane and *** work proves that this simple vapor-phase postsynthetic functionalization strategy may be applied in other porous polymers with wide application prospects in adsorption,separation and storage.

关键词： Porous polymers Postsynthetic amination Hypercrosslinked polymers Vapor-phase grafting Iodine capture

在线全文

学校读者我要写书评

暂无评论

高原红细胞增多症藏族医诊疗专家共识

中国中药杂志 2024年第17期49卷 4805-4811页

作者：高原红细胞增多症藏族医诊疗专家共识小组仲格嘉 Expert Consensus group of Tibetan Medicine Diagnosis and Treatment for High Altitude Polycythemia China

高原红细胞增多症是最常见的慢性高原病之一,是我国青藏高原地区突出的公共健康问题。藏族医(以下简称“藏医”)为高原红细胞增多症提供了安全有效的治疗方法,但目前尚无相应的藏医诊疗专家共识。该共识基于循证医学原则,参考中华中医... 详细信息

高原红细胞增多症是最常见的慢性高原病之一,是我国青藏高原地区突出的公共健康问题。藏族医(以下简称“藏医”)为高原红细胞增多症提供了安全有效的治疗方法,但目前尚无相应的藏医诊疗专家共识。该共识基于循证医学原则,参考中华中医药学会《中医药临床实践指南专家共识形成的技术规范》推荐的专家共识制定流程与方法,通过文献检索、专家访谈、临床调研和会议共识法确定5个临床问题,采用PICO原则[P(研究人群)、I(干预措施)、C(对照措施)、O(结局指标)]进行证据检索、筛选与综合,广泛征求国内各主要藏医医疗机构高原病和心脑血管疾病专家,以及部分中医、西医和循证医学专家的意见,通过1次专家共识会议和2轮德尔菲法专家问卷调查形成推荐意见及共识建议。共识包括疾病诊断、病因病机、辨证分型、临床治疗、结局评价、预防调护等内容。临床治疗方案包括藏医辨证论治、单方单药和外治疗法。各疗法均有相应的证据等级和推荐意见。该共识以临床问题为导向,辨病与辨证相结合,突出藏医的特色和优势,以期促进高原红细胞增多症藏医诊疗和研究的规范化,提高防治水平。

关键词：高原红细胞增多症藏族医诊断治疗专家共识

A Plane-Symmetric Inhomogeneous Cosmological Model of Perfect Fluid Distribution with Electromagnetic Field Ⅰ

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2010年第7期54卷 191-196页

作者： Anirudh Pradhan Prashant KumarSingh Anil Kumar Yadav Department of Mathematics Hindu Post-Graduate College Department of Physics Anand Engineering College(Sharada Group of Institutions)

A plane-symmetric inhomogeneous cosmological model of perfect fluid distribution with electro-magnetic field is obtained. F12 is the non-vanishing component of electromagnetic field tensor. To get a deterministic solution, we assume the free gravitational field is Petrov type-Ⅱ non-degenerate. Some physical and geometric properties of the model are also discussed.

关键词： cosmology electromagnetic field inhomogeneous solution