Results 21 to 30 of about 11,729 (169)
Novel Non‐Equimolar High‐Entropy Zirconates With Superior Thermophysical Properties
ABSTRACT Rare‐earth zirconates (RE2Zr2O7) are promising candidates for topcoat materials in thermal barrier coatings (TBCs). However, their practical application in TBCs is limited by poor fracture toughness and low thermal expansion coefficient (TEC).
Taoyi Lu +7 more
wiley +1 more source
Remanufacturing Strategies under the Carbon Tax Policy [PDF]
随着人们对环境问题关注的提升,尤其是开始普遍关注碳排放对大气影响的问题,各个国家出台了一系列控制碳排放的法规。面对政策环境的变化,许多类似于再制造策略的绿色环保策略已经被越来越多前瞻性的企业所重视,并逐渐将之作为企业生产运营过程中可选择的市场策略。因此,本文受此启发并选择侧重研究碳税背景下企业的再制造问题。 首先,本文探究企业如何在统一碳税政策背景下合理选择再制造策略并最优化其生产定价决策。基于此,本文在考虑企业新产品和再制造品碳排量的不同特点后,引入一种创新性的碳税形式,即基于产品碳税政策 ...
王玉
core
Location fingerprint optimization based access point deployment in indoor WLAN localization [PDF]
A novel access point (AP) deployment approach by optimizing the location fingerprints in indoor WLAN localization was proposed.Firstly,constructing the water-filling optimization model based on the maximum of the Euclidean distance of RSS between every ...
Mu ZHOU, Qiao-lin PU, Zeng-shan TIAN
core +1 more source
ABSTRACT Reliable operation of high‐performance magnetostrictive devices, composed of the giant magnetostrictive material (GMM), that is, the TbDyFe alloy, critically depends on an optimally tailored bias magnetic field. Sufficient intensity and uniformity are essential to induce the ideal initial strain in the GMM, enabling peak reciprocating output ...
Jinan Yu +12 more
wiley +1 more source
Design and Implementation of Adaptive Optimization System for Web Server Resources [PDF]
经研究发现目前Web服务器面临的数据处理在不断的叠加,但是自身的资源优化存在较大的问题和漏洞,本文提出了Web服务器资源自适应优化机制,该机制首先对影响Web服务器性能的相关因素进行分析。在此基础上确定性能评价指标,对这些指标进行实时监控,并根据监控数据对Web服务器性能做出评价。最后依据评价结果对系统资源做自适应调整,从而实现在各种工作负载条件下,Web服务器资源自适应优化功能,保证Web服务器高性能运行。 基于前面的工作,建立了Web服务器资源优化模型,该模型实现了三大功能:一是运行状态监控管理功能;
胡奎
core
Optimizing CuO on 3D Ordered Macroporous CeO2 for CO Oxidation in Rich Hydrogen
ABSTRACT CO preferential oxidation (CO‐PROX) in rich H2 is considered a feasible strategy to solve CO poisoning for fuel cells, but obtaining good activity at low temperatures is still a challenge. Herein, three‐dimensional ordered macroporous (3DOM) CuO/CeO2 catalysts were fabricated by a templating approach, with the metal–support interaction (MSI ...
Xiaohua Chen +7 more
wiley +1 more source
Research on Grinding and Using Parameters Optimization of Cemented Carbide Cutting Tool [PDF]
在航空航天制造领域,航空铝合金零部件是数量最多、制造任务最重的加工对象,其高效加工使用的高端硬质合金刀具多数需要进口。由于我国航空铝合金加工专用硬质合金刀具的研究起步较晚、发展滞后,材料研发、刀具设计以及制造装备技术整体水平不高,尤其缺乏针对不同航空铝合金零件加工用硬质合金刀具从切削机理分析、几何结构设计、磨制技术、加工参数优化整个过程的全链条式研究。本文针对航空铝合金7075加工用硬质合金刀具的磨制机理、刀具铣削性能、刀具几何结构与加工参数优化等方面进行贯通性应用基础研究尝试 ...
张祥雷
core
Laser‐Driven Halide Exchange and High‐Resolution Multicolor Patterning of Perovskite Films
ABSTRACT Translating the excellent properties of metal halide perovskites (MHPs) into practical flexible optoelectronic devices requires high‐resolution multicolor patterning techniques that are compatible with post‐fabrication processing. However, such a capability has remained elusive.
Shu Yang +6 more
wiley +1 more source
传统的土地利用优化配置模型无法灵活应对现实场景中多变的优化目标要求,也无法实现土地利用在空间布局上的优化.根据常见的优化目标进行抽象建模,建立了可扩展的多目标体系,并与蚁群算法有机结合,构建了基于可扩展多目标蚁群算法的土地利用优化配置模型,使土地利用配置在不同目标的指导下能够灵活优化,同时实现了土地利用配置在数量结构和空间布局优化上的统一,为土地利用规划提供了更具现实意义的参考方案.最后对该模型,以杭州市萧山区2015年土地利用格局为基础数据进行实例验证.结果表明:模型能够在多目标体系的指导下 ...
MOZhiliang(莫致良) +3 more
doaj +1 more source
A Study on Sequencing Problem of Mixed-model Assembly Lines in Company Y Based on Genetic Algorithm [PDF]
混流装配线通过对装配生产线的合理组织与排产优化,实现多品种共线装配,以较快的响应速度向客户提供定制的产品和服务。客车需求的多样化和客车市场的细分化,使得混流装配线成为Y公司普遍采用的一种生产方式。由于混流装配线复杂的装配过程会涉及不同的产品以及品种繁多的物料,因此,Y公司在努力改善其生产物流系统,以使混流总装线的运行更加平稳和高效。 本文在此背景下,以Y公司承装车间的Z总装线为研究对象,对其建立排序优化模型并利用遗传算法进行求解。首先,从装配流程和生产规划两方面分析Y公司总装线的管理现状 ...
谢平
core

