Results 11 to 20 of about 8,176 (104)
Gongye shui chuli, 2022 在传统微电解反应器基础上增加离子膜并用于处理循环冷却水。由于离子膜的存在，反应器阴极室内能够快速富集OH-，有利于去除Ca2+和Mg2+，同时阳极室内电解产生的Cl2溶于水生成的次氯酸盐可作为杀菌剂使用。探究了离子膜类型、电流密度、水力停留时间、极板间距等参数对循环冷却水硬度去除率和比能耗的影响，并探究了阳极室NaCl浓度对除硬效果、比能耗和阳极副产物的影响。结果表明，使用阳离子膜的反应器，在进水硬度为500 mg/L（以CaCO3计）、电流密度为25 A/m2、水力停留时间为14 min ...
刘松涛 +5 more
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“Se tutto è mafia, niente è mafia”
Antropologia Pubblica, 2023 Starting from a description of the characteristics identified by the Italian legal system for the recognition of the crime of mafia-type association (force of intimidation, associative bond, subjugation and code of silence) as defined by the 416 bis c.p., the contribution aims to produce an ethnography of the documents (Riles 2006; Hull 2012) - such as
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XcorTM经导管主动脉瓣置换术系统治疗重度主动脉瓣狭窄患者近期临床疗效观察
浙江大学学报. 医学版目的分析XcorTM经导管主动脉瓣置换术（TAVR）系统治疗重度主动脉瓣狭窄的近期临床疗效。方法本研究是单臂、前瞻性临床试验。纳入2022年12月—2023年8月在广东省人民医院（广东省心血管病研究所）瓣膜及冠心病外科接受XcorTM TAVR系统治疗的重度主动脉瓣狭窄患者。对比围手术期及随访期间主动脉瓣狭窄的差异，统计研究期间全因死亡、主动脉瓣反流、瓣周漏、心脑血管事件、再次手术等不良事件的发生率。结果全组共纳入32例重度主动脉瓣狭窄患者，其中男性20例，女性12例，年龄（70.9±4.3）岁 ...
王 圣文 +9 more
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Gongye shui chuli, 2004 膜生物反应器在污水处理中的应用范围和规模虽然不断增加,然而,膜污染严重阻碍了膜生物反应器技术的推广应用。作者从膜的性质、料液性质以及膜分离的操作条件三个方面分析了膜污染的成因和膜污染过程,系统论述了膜污染在国内外的研究进展;另外还从改善膜本身的抗污染能力,变化混合液的特性,优化膜分离的操作条件和膜清洗四个方面介绍了膜污染的防治方法。
霍守亮, 黄显怀, 刘绍根, 程静
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È un uccello, è un aereo, è Superman! Visione e identificazione sortale
Rivista di estetica, 2008 1. Introduzione Immaginate di guardare in una certa direzione nel cielo. Vedete un oggetto avvicinarsi. A un certo punto, dopo un alcuni istanti di incertezza, pensate di aver capito di cosa si tratta e dite al vostro amico: «E un uccello!». L’oggetto continua ad avvicinarsi e le ali che prima vi sembravano in movimento ora vi appaiono decisamente ...
Marzia Soavi +2 more
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Gongye shui chuli, 1997 采用十种不同的膜清洗方法对超滤丝厂废水后被污染的中性聚砜中空纤维超滤膜进行了研究。结果表明：0.1%NaOH、0.5%NaClO、0.1%渗透剂等组成的碱性溶液(简称M溶液 ...
侯爱芹, 赵择卿
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Gongye shui chuli, 2021 通过交联改性法对PTFE平板进行膜亲水改性，测试了亲水改性后PTFE平板膜的耐化学腐蚀性。通过亲水改性平板膜裹缠中空纤维膜的方式制备了PTFE复合膜，研究以PTFE复合膜为膜组件的AO-MBR系统对实际化工废水的处理效果，观察处理过程中膜通量与膜压差的变化，并对膜污染与清洗进行了相应探究。结果表明：在处理高浓度难降解化工废水时，采用PTFE复合膜的MBR工艺表现出良好的处理效果，AO-MBR系统对COD和NH3-N的去除率能稳定达到92%和90%；PTFE复合膜抗膜污染性能优异，耐化学腐蚀性强 ...
王鹏, 肖凯升, 王震, 陈文清
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Taxonomic and functional diversity of urban bees of the world
Conservation Biology, EarlyView.Abstract Bees play a pivotal role in terrestrial environments. Urbanization can affect these organisms and the ecosystem services they provide. However, knowledge of the global diversity of urban bees is limited. Thus, we summarized data on urban bee species identities and occurrences; compared distributions of all bees with those found in urban ...
João C. F. Cardoso +10 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The regeneration of osteoporotic bone defects is severely hampered by compromised endogenous healing capacity, demanding advanced strategies that actively orchestrate pro‐osteogenic microenvironments. Here, we report an integrated, self‐powered osteo‐regenerative system that uniquely leverages a dual ultrasound‐responsive piezoelectric ...
Bing Tan +6 more
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Gongye shui chuli, 2006 介绍了膜分离技术及其优点，有机膜、无机膜和复合膜在油田含油污水处理中的应用研究进展；分析了膜处理含油污水过程中的破乳机理、影响含油污水处理效果的各种因素、产生膜污染的原因及其控制措施；探讨了膜分离技术的研究方向和发展前景。最后指出，深入研究分离膜的分离过程和机理，探索合适的清洗周期，研究合适的清洗剂和清洗工艺，明确分离膜的预处理指标要求，合理安排工艺流程，开发新型膜及膜组件是膜分离技术在油田含油污水处理中应重点解决的问题。
蔺爱国, 刘培勇, 刘刚, 张国忠
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