Results 61 to 70 of about 38,634 (210)

The Ultrasonic Liquid Level Instrument Based on STC89C52 Single Chip Microcomputer [PDF]

open access: yes, 2016
在工业上,液位的测量被广泛应用于工业控制领域。对于某些比较恶劣的测量环境,不适宜由人直接测量液位的高低,这种情况下可采用水位仪来测量液位。超声波水位计是非接触型液位计,超声波水位计具有精度高、安装维护方便、适用范围广、价格便宜等优点而被广泛应用,提高了工业生产的智能化和安全性。 目前超声波水位仪的功能和价格,不同的厂家和不同的型号之间,相差较大。国内的产品相对比较便宜,但功能简单,精度不高。国外进口产品功能相对完善,精度较高,但价格不菲。对于一些中小型用户和企业来说,较难承受其价格,且维修不方便。因此 ...
庄鑫斌
core  

Emerging applications of large language models in ecology and conservation science

open access: yesConservation Biology, EarlyView.
Abstract Large language models (LLMs) mark a major development in artificial intelligence, with potentially transformative implications for ecology and conservation science. Built on advanced deep‐learning architectures, these models can support a wide range of tasks. We reviewed emerging applications of LLMs, drawing on the wider scientific literature
Christos Mammides   +5 more
wiley   +1 more source

Performance Analysis and Synchronization Algorithm of CS-DCSK [PDF]

open access: yes, 2016
混沌通信是以混沌信号为载波的一种通信技术,是近些年发展起来并受到较多关注的一种通信技术。由于混沌信号具有宽频带、伪噪声和良好的自相关与互相关等特性,因此,被广泛应用于扩频通信和保密通信等领域。码复用差分混沌键控(Code-ShiftedDifferentialChaosShiftKeying,CS-DCSK)是一种在码域实现参考信号和信息承载信号正交的非相干混沌调制技术,该调制技术消除了传统差分混沌键控(DifferentialChaosShiftKeying,DCSK)接收机中的延时电路,简化了接收机,
张琳
core  

Insights for conservation from the Ecological Knowledge Games project

open access: yesConservation Biology, EarlyView.
Abstract Environmental conservation research requires robust methods for collecting large‐scale behavioral data and engaging diverse stakeholders in decision‐making processes. We (Y.P., A.B.D., and N.B.) created EcoKnowGames (Ecological Knowledge Games), a transdisciplinary project that develops knowledge games for conservation science and data ...
Yuan Pan   +4 more
wiley   +1 more source

Artificial Intelligence for Language Learning: A Systematic Review of its Design, Theoretical Foundations, Implementation, and Impact

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao   +2 more
wiley   +1 more source

均流特性对避雷器组整体吸能特性影响的研究

open access: yesDianci bileiqi, 2020
为了分析多柱并联避雷器组均流特性对整体吸能特性的影响,笔者简要介绍了多柱并联避雷器组运行过程中电流分布特性。结合南网"两渡"直流输电工程,对换流站单回中性母线避雷器分流特性进行了理论计算,从理论上分析了多柱并联避雷器组单柱电流分布差异时其整体吸能特性。最后根据现场参数搭建了仿真平台,仿真结果表明多台避雷器并联情况下均流系数对整体吸能影响很大,性能恶化的避雷器吸收更多的能量,且使得整支避雷器总吸能严重下降。
刘波   +6 more
doaj  

基于动态可重构电池网络的大规模退役动力电池梯次利用储能系统运行性能评估 [PDF]

open access: yes全球能源互联网
退役动力电池因其一致性差、安全性薄弱等缺陷在梯次利用时面临巨大挑战。动态可重构电池网络(dynamic reconfigurable battery network,DRBN)能够有效提高退役动力电池梯次利用储能系统的一致性和安全性。目前DRBN储能系统已经进入工程应用阶段,然而现有的研究缺少对大规模DRBN储能系统的运行性能评估。为此,以实际运行的大规模退役动力电池梯次利用储能系统作为分析对象,选取储能系统中80个DRBN的1个月运行数据进行分析。从运行工况、均衡效果 ...
慈松   +4 more
doaj   +1 more source

Linguistic Analyses of Written Corrective Feedback for Chinese as a Second Language: ChatGPT Versus Human Teachers

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT This study conducted linguistic analyses of the written corrective feedback (WCF) for Chinese as a second language (CSL) provided by chat generative pre‐trained transformer (ChatGPT) and human teachers (including preservice teachers and senior teachers).
Ling Zhang   +2 more
wiley   +1 more source

填充节能复合墙板钢框架结构的抗震性能

open access: yesJianzhu Gangjiegou Jinzhan, 2015
为了获悉节能复合墙板与H形钢框架在地震作用下的受力性能与破坏机理,进行了8榀足尺填充节能复合墙板钢框架结构的低周反复荷载试验。详细分析了破坏模式、滞回曲线、骨架曲线、延性、耗能能力等。利用ABAQUS程序建立了填充节能复合墙板钢框架结构的有限元分析模型,进行了结构非线性全过程受力分析;该模型考虑了材料本构关系模型和复杂接触模型。试验结果验证了有限元分析的准确性。研究表明,填充节能复合墙板钢框架结构有良好的抗震性能和延性;墙板连接方式和墙板厚度是影响结构承载力和刚度的主要因素 ...
王静峰   +3 more
doaj  

老年脑梗死患者吞咽功能与呼吸肌肌力及吸入性肺炎的发生关系研究

open access: yesZhongguo shiyan zhenduanxue, 2023
目的 研究老年脑梗死患者吞咽功能与呼吸肌力及吸入性肺炎发生的相关性。方法 选取华中科技大学同济医学院附属同济医院2019年4月—2021年4月收治的142例老年脑梗死患者为研究对象(研究组),另选取95例同时期来本院进行体检的健康志愿者为对照组。采用视频吞咽造影功能障碍量表(VDS)和标准吞咽功能评价量表(SSA)评估受试者吞咽功能,检测受试者患者呼吸肌肌力,并比较对照组与研究组吞咽功能与呼吸肌肌力情况。研究组患者根据住院期间是否发生吸入性肺炎分为发生组和未发生组,比较发生组与未发生组吞咽功能 ...
彭希   +4 more
doaj  

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