Results 1 to 10 of about 16,898 (109)
Gongye shui chuli, 2022 油田采出水中细小分散相油滴的去除是含油污水有效处理的关键，而分散相油滴的去除效果又有赖于油滴聚结技术的发展。从目前国内外研究和应用的情况来看，聚结技术主要分为材料聚结技术和水力聚结技术，其中材料聚结又可分为润湿聚结和碰撞聚结。首先对材料聚结和水力聚结的机理进行了总结，并从原理角度分析了影响聚结除油效果的主要因素——聚结材料性质和聚结反应器结构。然后从提高除油效果和改善出水水质的角度分析综述了基于2种机理发展的技术与设备的研究与应用。从应用情况来看 ...
张敏霞, 刘涛, 安明明, 尤启明
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全球能源互联网针对传统高斯混合模型（Gaussian mixture model，GMM）聚类算法中计算复杂、收敛速度慢和人为确定聚类数目时存在盲目性和主观性等不足，提出了一种基于改进GMM的变电站负荷聚类算法。以传统GMM聚类算法为基础，采用k均值（k-means）算法确定初始聚类中心。减少了GMM聚类算法迭代步骤，提高了输出结果的稳定性。输出不同聚类数下聚类结果的Davies-Bouldin（DB）指标、Calinski-Harabasz（CH）指标和轮廓系数（silhouette coefficient，SC），
余浩 +5 more
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Gongye shui chuli, 2016 独到地分析了含油污水中油滴的材料聚结机理与水力聚结机理的区别和联系，综述了油滴的微观聚结行为。从聚结材料的选择与研制、表面改性与适当处理、聚结停留时间、材料聚结中的水力聚结作用4个方面，重点介绍了材料聚结技术的研究和应用。总结了材料聚结除油技术的不足，指出实现材料聚结和水力聚结的有机融合是材料聚结除油技术未来研究和发展的趋势。
桑义敏, 云昊, 韩严和, 梁存珍
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Journal of Analytical Psychology, EarlyView.Abstract Written as a letter to my 28‐year‐old self, this paper explores the development of my engagement with cultural complexes. On August 18, 2009, I finished a chapter applying cultural complexes to a history of China, complete with elaborate charts that seemed to confirm a process by which cultural complexes are formed, and how China’s then recent
Kevin Lu
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Institutional lessons from the Nordic management model
Conservation Biology, EarlyView.Abstract To improve wildlife management outcomes, in terms of reaching management goals and increasing legitimacy, Nordic countries have developed institutional systems involving stakeholders that aim for a more inclusive and participatory model.
Jens Nilsson +2 more
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Using the capabilities approach to achieve people‐centered conservation
Conservation Biology, EarlyView.Abstract Top‐down interventions carried out by state and nonstate institutions to conserve biodiversity and improve the lives of forest‐proximate people (FPP) in the Global South tend to reflect economistic understandings of human well‐being. More progressive and people‐centered conservation projects are guided by normative visions of how the world ...
Arthur Rodrigues +4 more
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Gongye shui chuli, 2019 针对油田高含聚污水悬浮固体含量测定时存在过滤速度慢，测定结果明显偏高，基于聚合物对含聚污水悬浮固体测定结果的影响机理，通过正交实验探讨了聚合物有效降解参数。结果表明：当聚合物质量浓度不大于500 mg/L时，对含聚污水的聚合物先进行预处理降解，再按照相关标准进行测定。该方法减少了抽滤时间和被截留在滤膜上聚合物的质量，消除了滤膜烘干过程中卷曲、破损现象，测量结果重现性好，更为接近真实值。
周少雄 +6 more
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Pest‐preservation paradox among insects
Conservation Biology, EarlyView.The pest‐preservation paradox is a non‐binary perspective that insects range from those that are harmful and requiring management on the one side, to those requiring conservation intervention on the opposite end of the spectrum. Importantly, the vast majority of insects occur somewhere in the center of the two extremes, and their position along the ...
Michael J. Samways +3 more
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Shuitu Baochi Xuebao, 2023 微团聚体是土壤团粒结构的基本组成单元,较大团聚体具有更强的稳定性,其形成与稳定对于土壤有机碳的长期吸存起着决定性作用。目前关于微团聚体形成与稳定性的研究多专注于农业土壤,红壤侵蚀地植被恢复后土壤团聚体稳定性、有机碳分布及微生物群落特征研究也主要集中在大团聚体上,而土壤微团聚体的动态变化及其主要影响因素尚不明确,对于其内在机制更缺乏了解。通过总结土壤微团聚体的形成过程及稳定性,综述了凋落物、根系和菌根对土壤微团聚体形成与稳定的影响,阐述了土壤微团聚体内微生物群落 ...
黄荣珍 +8 more
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Surface morphologies of gold films on melting glass surfaces(熔融玻璃基底上金薄膜的表面形貌)
Zhejiang Daxue xuebao. Lixue ban, 2002 研究了沉积在熔融玻璃表面金原子的扩散和凝聚行为.实验结果表明，金原子的凝聚过程具有明显的3个阶段：沉积在熔融玻璃表面的金原子先形成具有特征结构的网状薄膜；然后网孔破裂，凝聚成准圆形团簇；经无规扩散和凝聚，准圆形团簇最终组成大的分枝状凝聚体.准圆形团簇的扩散系数为10-7～10-8 cm2·s-1数量级.实验结果表明：熔融玻璃基底表面的金膜形貌随凝聚时间的变化而变化.
JINJin-sheng(金进生)
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