Results 121 to 130 of about 2,020,061 (284)
Pollution and Haunted Eco‐Histories: Silent Hill and Silent Horrors in Centralia, Pennsylvania
ABSTRACT Centralia is a former mining town and borough in Northeastern Pennsylvania, whose population has been steadily declining since the Mine Fire of 1962—a fire that still burns today. The “horrors” of living in Centralia are reflected in horror media set in postindustrial mining towns like Silent Hill.
Maz Jardon
wiley +1 more source
以热活化粉煤灰为原料水合法合成4A沸石分子筛。通过实验确定出合成4A沸石分子筛的最佳条件, 在最佳条件下合成的4A沸石分子筛的钙离子交换能力为308 mg/g。用合成的4A沸石分子筛处理垃圾渗滤液, 结果表明, 在pH为8的60 mL垃圾渗滤液中加入9 g 4A沸石分子筛吸附40 min后, 垃圾渗滤液中的NH3-N、COD去除率分别为88%和74.2%。用粉煤灰合成4A沸石分子筛, 并将其用于垃圾渗滤液的处理具有一定的应用前景。
任根宽, 纪利春, 相亚军
doaj +2 more sources
ABSTRACT The heterostructured 1T‐MoS2‐based bimetallic sulfides are promising bifunctional electrocatalysts for alkaline overall water splitting. However, the controllable synthesis of these catalysts is hindered by the ready conversion of Mo species to 2H‐MoS2 and the tedious heterostructure engineering during sulfidation.
Zijian Zhao +8 more
wiley +1 more source
目前已有的航迹关联方法虽然能很好地解决二传感器二目标或者二传感器多目标航迹融合问题,但处理多传感器多目标航迹关联问题时效果较差.因航迹关联问题实际上是判决融合问题,作者提出用Dempster合成规则的思想来解决之,但必须要对合成规则有新的推广.推广后的方法不仅能解决二传感器航迹关联问题,而且还能解决多传感器航迹关联问题.当传感器证据相互冲突或不够准确的时候,经典的Dempster合成规则无法应用,而推广的Dempster合成规则可解决该问题.最后作者给出了一个四传感器二航迹关联的例子 ...
马艳霞, 屈小媚
doaj
ABSTRACT Achieving concurrent high‐performance electromagnetic absorption and electromagnetic interference (EMI) shielding within a single material system at a fixed filler loading remains a significant challenge. Here, a heterodimensional structural strategy for CuCo2O4@C is proposed to reconcile dielectric and magnetic responses.
Min Zhang +5 more
wiley +1 more source
酶促立体有择合成(1R,3S,5S)-1-乙炔基3-二苯叔丁硅氧基双环[3.1.0]己烷
(1R,3S,5S) 1 乙炔基 3 二苯叔丁硅氧基双环[3.1.0]己烷(3)是合成19 失碳 1α,25 二羟基维生素D3(2)的重要合成子.为了寻找更有效的可用于工业化生产的合成(3)的方法,作者以(±)外向 1 溴双环[3.1.0] 3 己醇(±4)为原料,经酶促立体有择反应得到光学活性的(1S,3S,5S) 1 溴 双环 [3.1.0] 3 己醇(4),再经羟基保护等3步反应得到目标物(3).实验结果表明,该合成方法实验操作简单、收率较高,所合成的(3)的光学纯度可达99 ...
郭丽, 伍晓春, 李佩杰, 吴勇
doaj
本发明涉及燃料电池关键材料的合成技术,具体地说是一种燃料电池用复合质子交换膜的合成方法,步骤如下:多孔聚四氟乙烯膜经过表面改性以减小水接触角,增强润湿性,在与其润湿性良好的中沸点溶剂或低沸点溶剂中浸渍备用;将高分子固体电解质用高沸点溶剂密闭加热溶解后再加入中沸点、低沸点溶剂制成溶液;在多孔聚四氟乙烯膜上浇铸,加热挥发溶剂后进行结晶热处理即合成了复合质子交换膜。膜厚度可控在5~150μm之间。本发明合成了高性能燃料电池用复合质子交换膜,具有高分子固体电解质与聚四氟乙烯相容性良好、机械强度高、致密性良好 ...
张 宇 +4 more
core
ABSTRACT Arranging functional units into a specific organization is a practical structural strategy for achieving fabulous performance, known as the functional unit and organization (FUO) paradigm. This paradigm offers a concise shortcut to establishing structure–performance relationships.
Zhongtao Lu +5 more
wiley +1 more source
研究了纳米分子筛与硅藻土组成的复合材料与聚合物交联形成的复合动态膜层,测试了不同絮凝剂用量和不同流速下动态膜层的形成状况以及对废水中PO43-的去除效果。实验结果表明,复合材料在一定的条件下,能够形成稳定的膜层并能很好的去除废水中的PO43-。为该复合材料在实际生产中应用提供了参考。
王银叶, 付春明, 韩非, 张楠
doaj
Mixed‐Scale Powder Enables 3D Printing of Tungsten Alloy
ABSTRACT Laser powder bed fusion (LPBF) offers a promising route for manufacturing tungsten alloy components with complex geometries, whereas W–Ni–Fe alloys remain the most widely used tungsten alloys because of their excellent overall performance.
Jingjia Sun +3 more
wiley +1 more source

