Results 61 to 70 of about 10,240 (187)
Shuitu Baochi Xuebao, 2021 通过野外采样与室内分析试验，探究桂西北喀斯特区土地利用方式对石灰土土壤结构与肥力的影响。基于长期定位观测小区，分析比较刈割草地（CD）、乡土树种（XT）、落叶果园（GY）、种植牧草（MC）、种植玉米（YM）5种常见土地利用方式在石灰土表层（0—10 cm）和亚表层（10—20 cm）土壤的团聚体稳定性及其有机碳赋存特征。结果表明：5种土地利用方式下土壤机械稳定性团聚体含量均随粒级减小而减小，水稳性团聚体含量随粒级减小表现为先减小后增大，并且干湿筛团聚体粒级配比均以>1 mm粒径为主，其范围分别为67 ...
邓志豪 +4 more
doaj
Multi-computer control based on CAN bus for air compressors [PDF]
, 2008 分析传统空压机多机联控系统的不足之处和CAN总线的特点,提出一种各空压机在没有总调度机的情况下,通过动态分配算法,实现多机联控的方法.该方法使系统在部分空压机出故障时能做到"无缝连接",从而保障系统的正常运行.在该空压机系统中,通过CAN总线实现空压机的分散控制、多机联控,使空压机系统运行在最佳工况,实现各空压机的等疲劳运行.The disadvantages of traditional multi-computer control system used on air compressor ...
彭侠夫, 洪春苗
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Research Progress on the Effect of Heat Treatment on Soy Protein Structure and Emulsions [PDF]
In recent years, soybean protein is widely used in industries such as food, medicine, and cosmetics due to its unique nutritional value and excellent emulsifying properties. However, the application of soybean protein as an emulsifier is somewhat limited.
Tianlu HAN +6 more
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Risk, Hazards &Crisis in Public Policy, Volume 16, Issue 1, March 2025.ABSTRACT In an era of escalating global crises, understanding how political regimes shape disaster resilience is increasingly critical. This study examines the relationship of democratic, hybrid, and authoritarian governance on their influence on disaster management and long‐term recovery.
Arielle Kaim, Ina Kubbe
wiley +1 more source
Shuitu Baochi Xuebao, 2022 冻融循环作用下的土壤结构变化被认为是融雪期黑土坡面土壤侵蚀加剧的主要原因之一, 土壤团聚体稳定性与团聚体微结构是影响土壤可蚀性的关键因子。基于控制条件土壤冻融模拟试验, 采用湿筛法、扫描电子显微技术(SEM)和Image-Pro Plus(IPP)图像分析处理相结合的方法, 分析了冻融循环过程中黑土团聚体微结构的动态变化特征, 阐明了土壤团聚体水稳定性与团聚体微结构特征的内在联系。结果表明: (1)冻融循环对黑土团聚体水稳定性整体呈破坏作用。该作用在微观层面上表现为冻融循环驱动土壤孔隙趋于长条状发育 ...
王文刚 +4 more
doaj
, 2019 近年来,我国大量建筑物出现安全性降低或进入功能退化期,其中存在一些古老建筑的特殊加固改造需求。本文以厦门某具有重要历史意义的古老石墙建筑加固改造项目为例,在建筑内部结构破损严重的情况下,对石墙结构内部采用钢筋网水泥砂浆加固,新增构造柱及扶壁柱,并对内部框架结构梁柱板进行拆除重建,基础加宽加固等方法对建筑结构进行加固改造 ...
洪阳洲
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Stability evaluation of karst roof of pile foundation based on variable weight fuzzy comprehensive theory [PDF]
Regarding the lower accuracy of the Analytic Hierarchy Process (AHP) in assessing the stability of karst cave roof under pile foundations, an improved structural model of evaluation indicators based on variable weight theory was developed to establish an
Xuewen HU, Yun’an LI, Zhigao FAN
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Structural Analysis of Macroscale Wire-Driven Parallel Manipulator Gantry Crane Robot [PDF]
, 2008 造船门式起重机是船舶工业必不可少的重要设备之一。随着造船事业发展，为了缩短建造周期，普遍提高分段的重量，这使得造船门式起重机朝着大型化发展，同时对船体分段安装的灵活性提出了更高的要求。本文基于此对现有的造船门式起重机提出了一种新的结构——造船门式绳牵引并联起重机器人，以达到更好的灵活性和更大的起重量，并对此新型的造船门式起重机器人的主体进行了结构可行性的研究。本论文采用有限元方法对改造后的新型造船门式起重机器人结构进行了力学分析计算，从而考察其结构强度方面的可行性 ...
李葳
core
Niches and community stability of dominant herbaceous species in the forest and creek ecotone of Dehang Geopark [PDF]
[Objective] The study aims to explore the characteristics of ecological niche, interspecific connectivity, and community stability of dominant species in the herbaceous community of the forest and creek ecotone in Dehang Geopark, with the expectation ...
CHEN Gongxi +4 more
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