Results 21 to 30 of about 1,204,501 (150)

气态膜法回收垃圾渗滤液氨氮技术进展与机理探讨

Gongye shui chuli, 2023
目前传统生物脱氮工艺中需投加大量碳源用于提高垃圾渗滤液的C/N，且随着填埋龄增加，C/N严重失衡，将导致脱氮成本偏高。氨吹脱（汽提）法、鸟粪石法等脱氮技术已实际应用在垃圾渗滤液脱氮处理中，但总体应用效果均有待提高。气态膜法是一种新型低能耗、高效率的氨氮资源回收技术。综述了气态膜法在高氨氮垃圾渗滤液处理中的应用；并以双膜理论为基础，推导出适用于气态膜法的氨传质机理。气态膜法氨传质过程可归纳为串联阻力模型，即总传质阻力为料液侧传质阻力和气态膜内传质阻力之和，料液侧传质系数（Kf）与气态膜类型及其组件形式 ...
贺磊, 周涛, 赵由才
doaj   +2 more sources

Adaptive Chemical Strain Boundary in Freestanding BiSmFe2O6 Double‐Perovskite Membranes

Rare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Double‐perovskite multiferroic systems have attracted increasing attention due to their highly tunable structures and chemical adaptability. The uncontrollable performance changes caused by the release of boundary conditions are an important factor hindering the development of freestanding membranes.
Jie Tu, Hangren Li, Xudong Liu, Jiaqi Ding, Siyuan Du, Longyuan Shi, Menglin Li, Yonghui Wu, Pengfei Song, Guoqiang Xi, Yuzhe Yang, Dongxing Zheng, Xiaolong Li, Jianjun Tian, Linxing Zhang   +14 more
wiley   +1 more source

荧光法测定水中双酚A残留的研究

Gongye shui chuli, 2006
双酚A是一种环境内分泌干扰物质，是生产PC树脂及环氧树脂的主要原料，也可用作酚醛树脂、可塑性聚酯、抗氧剂及聚氯乙烯的稳定剂。基于在pH为1的酸性介质中，-β环糊精对双酚A荧光强度的增强作用，建立了荧光分光光度法测定水中双酚A残留的简单灵敏的方法。该法的线性范围为0.4～300.0μg/L，相对标准偏差为1.3%，检出限为0.020μg/L。用该法检测PC膜浸泡水样中双酚A残留量，结果令人满意。
唐舒雅, 庄惠生
doaj   +2 more sources

Adverse neonatal outcomes in small‐for‐gestational age twins identified using twin vs singleton growth charts: systematic review and meta‐analysis

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 706-715, December 2025.
ABSTRACT Objective To evaluate the use of twin vs singleton growth charts for detecting small‐for‐gestational‐age (SGA) twins at risk of adverse neonatal outcomes. Methods MEDLINE, EMBASE, CINAHL, Cochrane and Scopus databases were searched electronically from inception to May 2024.
S. Sorrenti, D. Di Mascio, A. Khalil, F. D'Antonio, F. Zullo, E. D'Alberti, V. D'Ambrosio, I. Mappa, A. Giancotti, G. Rizzo   +9 more
wiley   +1 more source

双位数乘法2

, 2014
《力学园地》编辑部：你们园地刊登的“双位数乘法”一文，感到很有意思，特别是有一些口诀来帮助记忆，便于在一些现场条件下做心速算。请问，还能介绍更多的双位数乘法速算方法吗？ 一名读者 双位数乘法2 应读者要求，这里再介绍两种双位数乘法的速算方法如下。 一、两个“头相同，尾互补（尾相加等于10）”的二位数乘法 ...
龙翔撰文
core   +2 more sources

Performance of non‐invasive prenatal testing in vanishing‐twin and multiple pregnancies: results of TRIDENT‐2 study

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 738-746, December 2025.
ABSTRACT Objective To evaluate the performance of non‐invasive prenatal testing (NIPT) in vanishing‐twin and multiple pregnancies. Methods This study was conducted as part of the TRIDENT‐2 study, in which NIPT was offered as a first‐tier screening test to women with a multiple pregnancy or vanishing‐twin pregnancy between 1 June 2020 and 31 March 2023 ...
J. C. A. van Eekhout, C. J. Bax, L. van Prooyen Schuurman, E. C. Becking, A. J. E. M. van der Ven, D. Van Opstal, E. M. J. Boon, M. V. E. Macville, M. N. Bekker, R. J. H. Galjaard, on behalf of the Dutch NIPT Consortium, E.A. Sistermans, L. Henneman, A. Polstra, E. Voorhoeve, S.L. Zelderen‐Bhola, E.M.J. Boon, M.P.R. Lombardi, M.C. Bakker, E.J. Bradley, E.M.J. Boon, C. Louwerens‐Zintel, M. Smit, M.C. van Maarle, M.B. Tan‐Sindhunata, K. van der Meij, H. Meij, C.J. Bax, E. Pajkrt, I.H. Linskens, L. Martin, J.T. Gitsels‐van der Wal, R. J. H. Galjaard, D. van Opstal, M.I. Srebniak, F.M. Sarquis Jehee, I.H.I.M. Hollink, F. Sleutels, W. de Valk, W.H. Deelen, A.M.S. Joosten, K.E.M. Diderich, M.E. Redeker, A.T.J.I. Go, M.F.C.M. Knapen, S. Galjaard, A.K.E. Prinsen, A.P.G. Braat, M.J.V. Hoffer, N.S. den Hollander, E.J.T. Verweij, M.C. Haak, M.V.E. Macville, S.J.C. Stevens, A. van der Wijngaard, L.H. Houben, M.A.A. van Esch‐Lennarts, L. Hamers, A.G.P. Jetten, S.A.I. Ghesquiere, B. de Koning, M. Zamani Esteki, C.J. Heesterbeek, C.E.M. de Die‐Smulders, H. Brunner, M.J. Pieters, A.B.C. Coumans, D.F.C.M. Smeets, B.H.W. Faas, D. Westra, M.M. Weiss, I. Derks‐Prinsen, I. Feenstra, M. van Rij, E. Sikkel, R.F. Suijkerbuijk, B. Sikkema‐Raddatz, I.M. van Langen, K. Bouman, L.K. Duin, G.H. Schuring‐Blom, K.D. Lichtenbelt, M.N. Bekker, E. van Vliet‐Lachotzki, J. Pot, A. J. E. M. van der Ven, S van 't Padje   +86 more
wiley   +1 more source

Impact of endometrial thickness on reproductive outcome in fresh and frozen–thawed embryo transfer: systematic review and meta‐analysis

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 3, Page 271-281, September 2025.
ABSTRACT Objective To evaluate the impact of endometrial thickness on the reproductive outcomes of embryo transfer (ET) treatments using both cut‐off‐based meta‐analysis and meta‐analysis of proportions. Methods This was a systematic review and meta‐analysis of comparative studies (randomized controlled trials, cohort studies, case–control studies) and
F. Pérez‐Milán, M. Caballero‐Campo, M. Carrera‐Roig, J. A. Domínguez‐Arroyo, E. Moratalla‐Bartolomé, J. L. Alcázar‐Zambrano, L. Alonso‐Pacheco, J. A. Carugno, J. M. Puente‐Águeda, S. Haimovich, on behalf of the Spanish Fertility Society Special Interest Group on Benign Organic Reproductive Disorders   +10 more
wiley   +1 more source

Universal cervical‐length screening to prevent preterm birth in twin pregnancy: cost‐utility analysis

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 3, Page 290-297, September 2025.
ABSTRACT Objective The purpose of this cost‐utility analysis was to model the clinical and economic impact of three cervical‐length screening strategies among low‐risk twin pregnancies: two‐step universal screening (at 18–20 and 20–22 weeks), one‐step universal screening (at 18–20 weeks) and no screening.
Y. Khaikin, R. A. Gladstone, K. E. Murphy, N. Melamed, P. Pechlivanoglou   +4 more
wiley   +1 more source

具有耐污染性的SiO₂/聚砜共混膜的研究

Gongye shui chuli, 2006
我国的水资源日益短缺。为缓解供水不足的紧张局面，可进行污水的深度处理回用。膜分离是一种有效的回用方法，但膜易受污染，导致通量下降。作者采用溶胶-凝胶法制备了耐污染性强的SiO2/聚砜复合膜，并对其进行了性能表征。SEM图像显示该膜具有双皮层不对称结构，膜内均匀分散有SiO2粒子，该粒子既能增强膜的强度，又能提高膜的耐污染能力。以自来水对该膜进行了水通量测试，测试表明所制膜水通量较高，在0.10 MPa下可达250~300 L/（m2·h）。
曲云, 张裕卿
doaj   +2 more sources

Laser‐guided thin‐film self‐rolling for asymmetric small‐scale swimmers

Rare Metals, Volume 44, Issue 8, Page 5607-5620, August 2025.
Graphical abstract AbstractSmall‐scale robots are promising miniaturized devices in biomedicine. Thin‐film self‐assembly is a commonly used strategy to fabricate tubular small‐scale robots. However, the existing methods have limitations like complex manufacturing processes and limited control of self‐assembly behavior.
Yi Chen, Xu‐Peng Lu, Minseong Kim, Rong‐Liang Yang, Min Tan, Qiao‐Ya‐Xiao Yuan, Wing Yan Poon, Yee Him Timothy Chan, Connie Kong Wai Lee, Yang Xu, Yang Liu, Mitch Gui‐Jun Li   +11 more
wiley   +1 more source