Results 31 to 40 of about 14,310 (214)
Research and Application on Key Technologies of LED Lighting for Large Henhouse [PDF]
, 2016 摘要 人工照明技术可促进肉鸡生长以提高产量，使鸡舍照明技术在近年来发展迅速。具有环保、节能、高效和寿命长等优点的LED照明技术广泛应用于各个领域。本文基于某企业鸡舍照明设备改造项目，结合LED照明技术，为企业设计了一套稳定可靠的大型鸡舍LED照明系统。 本文介绍了鸡舍LED照明系统总体方案，阐述了系统布局及要求，利用距高比概念确定鸡舍光照分布和单盏灯光通量，确定照度控制方式，确立系统控制方法，确定各分区供电的开关电源设计标准。在总体方案基础上进行控制系统设计，为解决远距离信息传输设计通信信道 ...
王新峰
core
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Silica nanosheets (SiO2 NSs) hold great promise for advanced thermal protection applications because of their exceptional thermal and chemical stability. However, their development has been hindered by challenges in scalable synthesis and structural integration for specialized applications.
Qun‐Yao Yuan +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为探究坝上高原不同退化程度杨树人工林对枯落物及土壤水源涵养功能退化的影响，于2016年7-9月在张北县进行样地调查，对不同退化程度杨树人工林地枯落物及土壤水源涵养功能进行定量分析。结果表明：（1）林下枯落物储量表现为轻度退化（24.68 t/hm2） > 中度退化（13.43 t/hm2） > 重度退化（3.66 t/hm2），枯落物有效拦蓄量表现为轻度退化（29.28 t/hm2） > 中度退化（23.18 t/hm2） > 重度退化（3.30 t/hm2），最大持水量为轻度退化（34.90 t ...
孙立博 +5 more
doaj
, 2013 轻量化已成为包括工程机械行业在内的制造业的一种发展趋势,开发节能环保的绿色工程机械已经被越来越多的国内工程机械企业作为核心的发展战略之一。“节能环保“日益成为全社会关注的焦点,用更小的消耗,产生更多的效用成为制造业追求的目标,轻量化技术因此也逐渐受到国内外制造业的重视。工程机械行业也不例外,特别是近年来,随着工程机械行业的迅速发展 ...
侯亮, 郭涛
core
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 79-88, January 2026.ABSTRACT Objective To evaluate the proportion of optimal assessments of endometrial thickness (ET) achieved by transvaginal ultrasound (TVS) compared with a multimodal (MM) sonographic approach in women with abnormal uterine bleeding (AUB). Methods This prospective observational study was a subset of the EPI‐SURE study conducted between June and ...
S. Nijjar +5 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2004 近年来 ,国内一些起重机厂家开发了性能优化的轻量系列吊车产品 ,其轮压值及小车重量较旧有系列吊车显著减轻 ,当钢结构厂房应用此类吊车时 ,可较大幅度的降低吊车梁与刚架的用钢量。本文介绍了按新旧系列不同参数计算吊车梁及门式刚架用钢量的结果比较及量化的规律分析 ...
柴昶, 武人岱, 刘迎春
doaj
Shuitu Baochi Xuebao, 2020 围绕设施菜田土壤盐渍化问题，以解磷、钾功能微生物胶质芽孢杆菌和巨大芽孢杆菌为研究对象，探究了盐分胁迫对功能菌活性、解磷钾能力的影响，并阐明了含2种功能菌微生物菌剂在轻度盐渍化设施菜田的作用效应。结果表明，混合功能菌最大耐受盐浓度为10.5% NaCl，最适宜生长盐分浓度为0.5% NaCl，且解磷、钾能力最强，有效磷、钾增幅分别为52.06%，75.41%；此外，轻度盐渍化设施菜田的小区试验结果显示含2种功能菌的菌剂可提高番茄、甜瓜、西瓜果实VC和可溶性糖含量，分别增产104.81%，23.72%，28.
耿丽平 +5 more
doaj
Design and Implementation of Wireless Video Capture Car System Based on ARM11 [PDF]
, 2015 近年来随着嵌入式系统技术、无线通信技术的快速发展，嵌入式无线视频监控系统的相关应用受到了极大的关注，体积小、功耗低、性能稳定、移动方便、适应性强是视频监控与应用的发展趋势。在此背景下，设计一套基于嵌入式系统的移动式无线视频监控系统将会有广阔的应用前景。 本文针对嵌入式无线视频采集、视频压缩、视频传输等问题，基于ARM+Linux系统、H264视频压缩、RTP传输协议等技术，设计并实现了以遥控小车为载体的基于嵌入式Linux系统的无线视频采集系统，其主要研究内容如下： 1 ...
谢祥徐
core
Lightweight neural network techniques: evolution and prospect from static compression to dynamic computation [PDF]
The conflict between neural network's growing scale and edge device's limited resources has accelerated lightweight neural network techniques. Their evolution was examined through three stages: static compression (quantization, pruning, knowledge ...
DA Mingtian +3 more
core +1 more source
Finding floral and faunal species richness optima among active fire regimes
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical‐centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity.
Zachary L. Steel +8 more
wiley +1 more source