Results 41 to 50 of about 561,838 (163)

Gadolinium‐Induced Activation of CoNiO2 for Efficient Oxygen Evolution: A Structural and Electronic Modulation Approach

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Multicomponent transition metal oxides (TMOs) incorporating rare‐earth (RE) elements have emerged as promising materials for the oxygen evolution reaction (OER). However, knowledge of how to regulate the structure of TMO‐based nanomaterials through RE incorporation to enhance catalytic performance remains limited.
Bolin Zhao   +6 more
wiley   +1 more source

优化锅炉连续排污控制方式

open access: yesGongye shui chuli, 2003
以在线炉水电导率表的输出信号控制连排阀门开度实现连排自动控制,在特定条件下,能取得一定的实际效果。但其会与汽包加药造成冲突,二者难以协调工作。因此提出,根据炉水中硅酸的蒸汽溶解携带性最强的特性,以在线炉水硅表控制连排会取得更好的控制水汽质量的效果。
梁茂
doaj  

A Dual Co‐Reactant Accelerator Based On Nanoreactor‐Encapsulated CeO2 Nanozymes to Drive Potentiated Luminol Cathodic Electrochemiluminescence for Ultrasensitive Immunoassay

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT The precise quantification of cytokines is crucial for monitoring disease onset and progression. Herein, we developed a synergistic signal amplification approach by utilizing nanoreactor‐encapsulated CeO2 nanozymes, which were in situ electrodeposited within the mesoporous silica nanochannel film (SNF) grown on indium tin oxide (ITO ...
Yu Cui   +4 more
wiley   +1 more source

基于OSPF的ASON路由的一种加密方案

open access: yesGuangtongxin yanjiu, 2007
自动交换光网络(ASON)控制协议采用通用多协议标签交换(GMPLS)控制协议族,其路由部分主要为开放式最短路径优先(OSPF)协议。文章分析了OSPF协议加密措施存在的安全隐患,并对现有的加密方案进行了改进。针对OSPF协议的安全模式,提出了一种可以应用于ASON中路由技术的新的安全性方案。基于数论算法,实现S盒动态调整,通过动态产生的子密钥,在迭代过程中对分组进行加密。
李彬   +5 more
doaj  

Superior Abrasibility of YSZ(ESP)/BN@ZrO2‐Polyester Composite Sealing Coating Reinforcing With Hybrid Micron/Nanometer Multiscaled Pore Structure

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Composite materials hold significant potential for abrasive sealing, yet composite materials used for abrasive sealing fall short in service durability under extreme environments. Here, a controllable strategy for adjusting pore structure is proposed, aiming to design a YSZ(ESP)/BN@ZrO2‐polyester coating with hybrid micron/nanometer ...
Shuang Yu   +8 more
wiley   +1 more source

多机器人协调操作控制系统的设计

open access: yes, 1987
在柔性制造系统和装配自动线上多个机器人的协调操作是一个新的研究领域。本文主要涉及多机器人协调操作控制系统的设计。多机器人系统不仅需要考虑分级结构,而且需要考虑包括机器人动力学在内的各种因素。本文介绍了一种应用于多机器人系统的分机控制器,其中包括机器人动力学,耦合效应和非线性控制,以及输入增益块 ...
郭明
core  

Complexion‐Mediated Dislocation Transfer Enables Exceptional Strength‐Toughness Synergy in Multicomponent‐Alloy Bonded Hardmetal

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT The inherent brittleness of hardmetals stems from the rigid covalent bond in the ceramic matrix and the sharp ceramic/metal interface, which restricts the nucleation and motion of dislocations. In this study, a novel strategy is proposed to activate significant dislocation behaviors in the WC matrix by employing a non‐equiatomic CoNiFeCr ...
Cheng Qian   +9 more
wiley   +1 more source

递阶控制结构下CIMS控制器的调度规划法

open access: yes, 1992
本文给出了一种CIMS递阶控制结构中单元与车间协调决策过程的单元决策方法
薛劲松, 彭威
core  

油井自动加药系统的设计开发

open access: yesShiyou jixie, 2015
针对油井人工加药存在对加药量无法准确控制、劳动强度大、小产量油井成本相对偏高及无法实现多点协调监控的问题,设计开发了油井自动加药系统。该系统采用西门子S7-200的PLC控制模块,根据加药流量的反馈值来控制阀门开合度,自动进行PID调节,控制加药量,达到自动控制目的;自动加药系统运行后,可在SCADA系统中对其各项参数进行实时监视和控制,了解设备的运行状况及数据变化情况,在上位机中实现对工作现场的数据采集、设备控制、参数调节以及信号报警;由PLC模块组成的下位机与上位机进行通信 ...
徐学武, 吴文秀, 刘, 琛
doaj  

基于JAIN SIP的多媒体会议系统中发言权控制

open access: yesGuangtongxin yanjiu, 2008
发言权控制(Floor Control)是多媒体会议中会议控制的一部分,用来协调参与者对底层共享资源的使用,它直接关系到会议的服务质量。文章利用会话初始协议(SIP)的可扩展性,在SUN公司为实现SIP应用而提供的一套Java接口(JAINSIP)架构下设计并实现了SIP多媒体会议系统的发言权控制系统,该系统具有控制方式多样化,适用于分布式系统等特点。测试结果表明系统设计合理,并具有延迟较小的特点,满足分布式系统的要求。
包玲, 朱翠涛
doaj  

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