检索结果-南通市图书馆

Improving Friend Recommendation for Online Learning with Fine-Grained Evolving Interest

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2022年第6期37卷 1444-1463页

作者： Ming-Min Shao Wen-Jun Jiang Jie Wu Yu-Qing shi tak.shing Yum Ji Zhang College of Computer Science and Electronic Engineering Hunan UniversityChangsha 410082China Department of Computer and Information Sciences Temple UniversityPhiladelphia 19122U.S.A. School of Computer Science and Engineering Northeastern UniversityShenyang 110819China Department of Information Engineering Chinese University of Hong KongHong Kong 999077China Department of Mathematics and Computing University of Southern QueenslandBrisbaneQLD 4350Australia

Friend recommendation plays a key role in promoting user experience in online social networks(OSNs).However,existing studies usually neglect users’fine-grained interest as well as the evolving feature of interest,which may cause unsuitable *** particular,some OSNs,such as the online learning community,even have little work on friend *** this end,we strive to improve friend recommendation with fine-grained evolving interest in this *** take the online learning community as an application scenario,which is a special type of OSNs for people to learn courses *** partners can help improve learners’learning effect and improve the attractiveness of *** propose a learning partner recommendation framework based on the evolution of fine-grained learning interest(LPRF-E for short).We extract a sequence of learning interest tags that changes over ***,we explore the time feature to predict evolving learning ***,we recommend learning partners by fine-grained interest *** also refine the learning partner recommendation framework with users’social influence(denoted as LPRF-F for differentiation).Extensive experiments on two real datasets crawled from Chinese University MOOC and Douban Book validate that the proposed LPRF-E and LPRF-F models achieve a high accuracy(i.e.,approximate 50%improvements on the precision and the recall)and can recommend learning partners with high quality(e.g.,more experienced and helpful).

关键词： online social network friend recommendation fine-grained interest evolving feature tag online learning community

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国共产党坚持胸怀天下基本经验研究

太原理工大学学报（社会科学版） 2024年第4期42卷 30-37页

作者：石宇山西农业大学马克思主义学院山西晋中030801 南京大学马克思主义学院江苏南京210023

坚持胸怀天下是中国共产党百年奋斗积累的历史经验,也是中国共产党人不断推进实践基础上的理论创新所坚持的重要方法论原则。在新时代新征程中继续坚持和践行胸怀天下,需要在坚持顺应时代潮流与把握历史主动的辩证统一、营造自身良好发... 详细信息

坚持胸怀天下是中国共产党百年奋斗积累的历史经验,也是中国共产党人不断推进实践基础上的理论创新所坚持的重要方法论原则。在新时代新征程中继续坚持和践行胸怀天下,需要在坚持顺应时代潮流与把握历史主动的辩证统一、营造自身良好发展环境与维护世界和平的辩证统一、赢得自身发展与为世界做出更大贡献的辩证统一、关注人类前途命运与塑造自身良好形象的辩证统一中实现中国与世界的良性互动,实现“立己”与“达人”的相统一,为实现中华民族伟大复兴和世界和平与发展不懈奋斗。

关键词：中国共产党胸怀天下和平发展世界贡献

SAR-LAM:面向小样本SAR目标识别的轻量化适应策略

在线全文

学校读者我要写书评

暂无评论

空军工程大学学报 2024年第3期25卷 103-111页

作者：史松昊王晓丹空军工程大学防空反导学院西安710051

针对小样本学习中跨域迁移导致模型性能下降的问题,提出一种面向小样本SAR目标识别的轻量化适应策略(SAR-LAM)。该方法通过知识蒸馏预训练一个具有泛化性能的通用编码器,向其中嵌入一个只在少量目标域样本上进行训练的适应模块,而后将... 详细信息

针对小样本学习中跨域迁移导致模型性能下降的问题,提出一种面向小样本SAR目标识别的轻量化适应策略(SAR-LAM)。该方法通过知识蒸馏预训练一个具有泛化性能的通用编码器,向其中嵌入一个只在少量目标域样本上进行训练的适应模块,而后将提取的特征映射到一个分辨性更高的空间内,最终以原型网络为基线对查询集样本进行分类。该适应策略以增加少量学习参数为代价,克服了数据分布差异导致模型迁移受限的困难,增强了模型在目标域提取特征的能力,在小样本条件下将SAR目标识别的准确率提升了至少1.93个百分点,较其他方法展现出一定的优越性。

关键词： SAR目标识别跨域小样本学习轻量化

The Nano Research Young Innovators Awards in bio-inspired nanomaterials

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第2期17卷 417-425页

作者： Jun Chen Shuotao Wang Department of Bioengineering University of CaliforniaLos AngelesLos AngelesCA 90095USA Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Nano Research Young Innovators(NR45)Awards are designed to acknowledge and celebrate the achievements of young researchers under 45 years of *** individuals have made significant contributions to the field of nanoscience and *** the inaugural NR45 Awards in 2018,the journal's editorial board has recognized over a hundred innovators specializing in nanobiotechnology,nano energy,two-dimensional materials,and *** focus of the 2023 NR45 Awards is on bioinspired nanomaterials,acknowledging thirty-three outstanding young innovators for their extraordinary contributions in developing these materials with applications spanning clean energy,human healthcare,monitoring,and disease treatments,as shown in *** extend our heartfelt congratulations to all the 33 NR45 Awardees in 2023!

关键词： journal materials contributions

Three-Dimensional Lattice Boltzmann Simulation of Two-Phase Flow Containing a Deformable Body with a Viscoelastic Membrane

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Computational Physics 2011年第5期9卷 1397-1413页

作者： Toshiro Murayama Masato Yoshino Tetsuo hirata Department of Mathematics and System Development Engineering Interdisciplinary Graduate School of Science and TechnologyShinshu University4-17-1 WakasatoNagano-shiNagano 380-8553Japan Satellite Venture Business Laboratory(SVBL) Shinshu University3-15-1 TokidaUeda-shiNagano 386-8567Japan Department of Mechanical Systems Engineering Faculty of EngineeringShinshu University4-17-1 WakasatoNagano-shiNagano 380-8553Japan CREST Japan Science and Technology Agency4-1-8 HonchoKawaguchi-shiSaitama 332-0012Japan

The lattice Boltzmann method(LBM)with an elastic model is applied to the simulation of two-phase flows containing a deformable body with a viscoelastic *** numerical method is based on the LBM for incompressible two-phase fluid flows with the same *** body has an internal fluid covered by a viscoelastic membrane of a finite *** elastic model is introduced to the LBM in order to determine the elastic forces acting on the viscoelastic membrane of the *** the present method,we take account of changes in surface area of the membrane and in total volume of the body as well as shear deformation of the *** using this method,we calculate two problems,the behavior of an initially spherical body under shear flow and the motion of a body with initially spherical or biconcave discoidal shape in square pipe *** deformations of the body(the Taylor shape parameter)for various shear rates are in good agreement with other numerical ***,tank-treading motion,which is a characteristic motion of viscoelastic bodies in shear flows,is simulated by the present method.

关键词： Lattice Boltzmann method(LBM) two-phase flow viscoelastic membrane shear flow tank-treading motion

Lattice Boltzmann Simulation of Nucleate Pool Boiling in Saturated Liquid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Computational Physics 2011年第5期9卷 1347-1361页

作者： Yoshito Tanaka Masato Yoshino Tetsuo hirata Department of Mathematics and System Development Engineering Interdisciplinary Graduate School of Science and TechnologyShinshu University4-17-1WakasatoNagano-shiNagano 380-8553Japan Department of Mechanical Systems Engineering Faculty of EngineeringShinshu UniversityNagano-shiNagano 380-8553Japan CREST Japan Science and Technology Agency4-1-8HonchoKawaguchi-shiSaitama 332-0012Japan

A thermal lattice Boltzmann method(LBM)for two-phase fluid flows in nucleate pool boiling process is *** the present method,a new function for heat transfer is introduced to the isothermal LBM for two-phase immiscible fluids with large density *** calculated temperature is substituted into the pressure tensor,which is used for the calculation of an order parameter representing two phases so that bubbles can be formed by nucleate *** using this method,twodimensional simulations of nucleate pool boiling by a heat source on a solid wall are carried out with the boundary condition for a constant heat *** flow characteristics and temperature distribution in the nucleate pool boiling process are *** is seen that a bubble nucleation is formed at first and then the bubble grows and leaves the wall,finally going up with deformation by the buoyant *** addition,the effects of the gravity and the surface wettability on the bubble diameter at departure are numerically *** calculated results are in qualitative agreement with other theoretical predictions with available experimental data.

关键词： Lattice Boltzmann method(LBM) two-phase fluid flows heat transfer nucleate pool boiling wettability

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

1例肺隐球菌病患者抗感染治疗的药学分析

抗感染药学 2024年第5期21卷 451-456页

作者：杨少林熊世娟普定县中医医院药剂科贵州安顺562100 贵州省人民医院药剂科贵阳550002

目的:分析1例隐球菌感染患者的诊疗过程,为隐球菌病患者的救治提供参考。方法与结果:患者因“肺炎”被收入医院呼吸与危重症医学科治疗,在急诊时予祛痰、抗感染等治疗;入院第5天,根据患者血清隐球菌荚膜抗原检查、肺部CT影像学结果和炎... 详细信息

目的:分析1例隐球菌感染患者的诊疗过程,为隐球菌病患者的救治提供参考。方法与结果:患者因“肺炎”被收入医院呼吸与危重症医学科治疗,在急诊时予祛痰、抗感染等治疗;入院第5天,根据患者血清隐球菌荚膜抗原检查、肺部CT影像学结果和炎症指标结果,支持诊断为肺隐球菌病,予加用氟康唑氯化钠注射液抗感染治疗,临床药师通过对肺隐球菌病患者抗感染治疗的分析,结合患者临床症状、用药调整、病情转归情况与查阅相关文献,考虑患者身体质量指数为28为肥胖,为保证体内达到有效血药浓度,负荷氟康唑剂量可给到0.84 g,建议予患者经静脉滴注氟康唑氯化钠注射液(400 mg,q12h);入院第7天,患者临床症状较前改善,减少给药频率予氟康唑氯化钠注射液(0.4 g,q24h)抗感染治疗;入院第13天,患者肺部CT提示炎症较前进展,继续予抗感染;入院第17天,患者整体状况尚可,准予出院。结论:临床药师在参与隐球菌抗感染用药治疗过程中,通过积极开展药学监护和用药教育,结合患者实际情况,充分考虑其基础疾病(糖尿病)对感染和自身抵抗力影响和患者自身体质情况,兼顾药物不良反应与相互作用,制定个体化用药方案,获得了制定肺隐球菌病治疗方案的宝贵经验。

关键词：新型隐球菌肺隐球菌病氟康唑药学监护临床药师

在线全文

学校读者我要写书评

暂无评论

低变质煤CO来源及防控技术研究

煤矿安全 2024年第1期55卷 132-138页

作者：王永敬王坤陈洋师吉林秦乐静煤炭科学研究总院北京100013 中煤科工集团沈阳研究院有限公司辽宁抚顺113122 煤矿安全技术国家重点实验室辽宁抚顺113122 中国矿业大学(北京) 北京100083

为了研究低变质煤CO来源,降低煤层自然发火风险;以大南湖一矿3#煤层为研究对象,通过程序升温实验、实验模拟及现场观测等手段,研究3#煤层CO赋存、开采及割煤中CO产生规律及回风隅角CO来源占比等规律。结果表明:煤在无氧下粉碎,煤分子共... 详细信息

为了研究低变质煤CO来源,降低煤层自然发火风险;以大南湖一矿3#煤层为研究对象,通过程序升温实验、实验模拟及现场观测等手段,研究3#煤层CO赋存、开采及割煤中CO产生规律及回风隅角CO来源占比等规律。结果表明:煤在无氧下粉碎,煤分子共价键断裂生成的大量官能团、自由基相互作用产生极少量CO;煤在有氧下粉碎,产生大量CO,随煤样比表面积增大,CO体积分数随之增加并最终趋于稳定;采煤机割煤中产生高温使煤体发生氧化产生CO体积分数为(30~50)×10^(-6);回风隅角CO来源于采空区的CO体积分数占回风隅角CO总体积分数的28%,70%以上的CO来源于生产时期后溜破碎煤体氧化。根据低变质煤CO来源,采取了有针对性的架后喷洒CO复合抑制剂、采空区压注冷氮及漏风封堵等综合防控措施,使回风隅角及回风流CO体积分数大幅降低。

关键词：低变质煤自然发火程序升温 CO赋存复合抑制剂

Structural, densitometric and biomechanical evaluations of Chinese patients with long-term bisphosphonate treatment

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2013年第1期126卷 27-33页

作者： LEUNG Kwok-sui TANG Ning James Griffith CHOY tak-Kee HUNG Vivian Wing-Yin MOK Hoi-Wa shi Lin LEUNG Ping-Chung CHEUNG Wing-Hoi Department of Orthopaedics and Traumatology and Bone Quality and Health Center The Chinese University of Hong Kong Shatin Hong Kong SAR China Department of Imaging and Interventional Radiology The Chinese University of Hong Kong Shatin Hong Kong SAR China The Jockey Club Center for Osteoporosis Care and Control The Chinese University of Hong Kong Shatin Hong Kong SAR China Orthopaedic Research Laboratory of Translational MedicineResearch and Development Center Institute of Biomedical andHealth Engineering Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences China

Background The association of long-term bisphosphonate treatment for osteoporosis and related safety problems such as atypical fractures were not clearly defined. This study was to evaluate the structural, densitometric and biomechanical properties of the prolonged bisphosphonate-loaded bones. Methods Bone mineral density （BMD） at hip and femoral midshaft, bone cross-sectional area, moment of inertia of both femurs, bone formation and resorption biochemical markers were compared between 28 elderly with at least 4 years of bisphosphonate treatment from 2002 through 2006 and age-matched group of 37 elderly. Results The total hip BMD and t-score were found not different between two groups. However, bisphosphonate treated patients were found to have significantly lower bone mineral content in the femoral shaft （P 〈0.05）; morphological study showed lower cross-sectional area in subtrochanteric and mid-diaphyseal region and thus significantly lower moment of inertia （P 〈0.01）. High resolution-peripheral quantitative computed tomography showed significantly decreased trabeculardensity, bone volume ratio, trabecular number but increased trabecular spacing in tibia and distal radius. Finite element analysis further confirmed significantly lower stiffness and failure load in tibia. Biochemical studies also showed lower bone resorption and severely suppressed bone formation activity （P 〈0.001）. Conclusions The unchanged total hip BMD between two groups confirmed the beneficial effects of bisphosphonate on trabecular bone, thus preventing osteoporotic fractures at large in previous studies. However, the inferior structural, densitometric and biomechanical properties at cortical bones, especially femur midshaft, need a special attention to look into the association between long-term bisphosphonate intake and the occurrence of stress fractures. When patients taking bisphosphonate complain of proximal thigh pain or discomfort, plain X-ray film can be the first line screening. All

关键词： bisphosphonate bone mineral density moment of inertia HR-pQCT cortical bone