Results 31 to 40 of about 1,385,369 (163)
Infrastructure and Poverty Traps
Poverty &Public Policy, Volume 17, Issue 3, September 2025.ABSTRACT This paper investigates whether infrastructure development helps poor economies escape low‐income traps or transition to higher‐income levels. Infrastructure has always been central to development policies and is critical for achieving the SDGs.
A. Olatunji, L. Ado‐Kofie, B. Ouattara
wiley +1 more source
Gongye shui chuli, 2019 污泥脱水是实现污泥减量化和资源化利用的关键步骤。研究了自制聚丙烯酸絮凝剂PR在低温热处理条件下对印染污泥脱水性能的影响，探究其脱水机理。结果表明，PR能显著改善污泥的脱水性能。最佳工艺条件：PR用量15 mg/g，硫酸用量0.002 mL/g，75℃下热处理30 min。处理后污泥比阻降至2.80×1012 m/kg，降低了98.80%，泥饼含水率降至84.59%，结合水含量降至28.27%。
郭曼曼, 张宾, 马立标, 柳荣展
doaj
Uncovering Xi Jinping's Policy Agenda: Text As Data Approach
The Developing Economies, Volume 63, Issue 1, Page 9-46, March 2025.How many agendas has Xi Jinping put forth and promoted since taking office in 2012, and what are the types of agendas? How much of political attention has each agenda received, and how has the allocation of attention changed over time? We utilize a dataset of presidential statements, speeches, and reports from 2012 to 2022 and employed automated text ...
Jaehwan Lim, Asei Ito, Hongyong Zhang
wiley +1 more source
Gongye shui chuli, 2000 以天然高分子植物粉F691为原料，通过羧甲基化、接枝共聚和曼尼期(Mannich)三步反应合成出两性天然高分子改性絮凝剂(CGAAC)。CGAAC对污泥脱水性能的研究结果表明:在用量为2～20mg/L的范围内，CGAAC能明显改善污泥的沉降性能和过滤性能，其脱水性能优于阳离子絮凝剂PAM-C。
王杰, 肖锦, 詹怀宇
doaj
Cancer Innovation, Volume 3, Issue 6, December 2024.This study developed a NCC‐BC‐A scale with relatively high validity and reliability for breast cancer (BC) patients. NCC‐BC‐A scale fully considered the characteristics of systemic treatment status for BC and the realistic situation in China, which may help clinicians to pay more attention to QOL of BC patients and to optimize management system for BC.
Fei Ma +4 more
wiley +1 more source
Gongye shui chuli, 2015 研究了磁场调质对污水厂活性污泥脱水性能的影响,在不同磁场强度和磁化时间下,考察了活性污泥沉降性能、污泥比阻、分形维数、污泥粒径等参数的变化规律。结果表明:磁化时间为20 min、磁场强度为55 mT时,污泥的沉降性能最佳,污泥结构最为密实,污泥比阻可由原来的2.03×1013 m/kg下降到9.5×1012 m/kg,能有效改善污泥的脱水性能。
谢敏, 邓玉梅, 刘小波, 李好
doaj
People and Nature, Volume 6, Issue 6, Page 2431-2448, December 2024.Abstract How humans connect with nature impacts the well‐being of both people and ecosystems. Being disconnected from nature can lead to attitudes and behaviours that ultimately damage our physical and mental health and cause irreparable harm to the planet.
Xuanyi Wang, Shulin Chen
wiley +1 more source
, 2009 采用电导法、光镜观测、加热烘干法、茚三酮比色法、蒽酮比色法分别分析了变水过程中,刺叶赤藓(Syntrichia caninervis Mitt.)质膜透性、外部形态结构、相对含水量、游离脯氨酸、可溶性糖含量的变化,结果表明:(1)0—6,6—12,12—24和24—48h四个脱水时段之间、0—0.5,0.5—1,1—1.5和1.5—2h四个复水时段之间电导率的差异并不显著(p>0.01),说明在脱水、复水过程中,刺叶赤藓叶片质膜结构保持稳定;(2)脱水时叶片皱缩,紧贴于茎,有效避免了水分散失 ...
张元明, 吴楠, 魏美丽
core
Eyes on nature: Embedded vision cameras for terrestrial biodiversity monitoring
Methods in Ecology and Evolution, Volume 15, Issue 12, Page 2262-2275, December 2024.Abstract We need comprehensive information to manage and protect biodiversity in the face of global environmental challenges, and artificial intelligence is required to generate that information from vast amounts of biodiversity data. Currently, vision‐based monitoring methods are heterogenous; they poorly cover spatial and temporal dimensions, overly ...
Kevin F. A. Darras +11 more
wiley +1 more source