Results 21 to 30 of about 812,292 (163)
Using incentive payments to promote human–carnivore coexistence
Abstract For many large carnivores, minimizing the financial burden they impose on local people is critical to their conservation. Incentive‐based programs that provide people with financial benefits for taking pro‐conservation actions or achieving conservation goals are a promising tool for promoting human–carnivore coexistence. Although the number of
Adam Pekor +9 more
wiley +1 more source
A more‐than‐human political ecology of Indonesian songbird trade
Abstract Since its inception, conservation science has considered wildlife trade a problem. In focusing on conservation outcomes, conservationists almost completely ignore the welfare of traded animals and plants and the harms they endure. We developed a political ecology approach that incorporates the interconnectedness of people with animals and ...
Sicily Fiennes +9 more
wiley +1 more source
刘慎谔先生是中国著名的植物学家、生态学家和林学家,他在20世纪60年代初提出了动态地植物学理论。本文作者利用动态地植物学理论,研究了中国东北地区植被的几个焦点问题:(1)地带性顶极是动态地植物学核心问题,在一个地区只有一个地带性顶极,受大气候控制,其余的都是由局部环境条件影响下形成的非地性顶极。东北地区从东南向西北随着水分条件的变化出现湿润区、半湿润区和半干旱区,地带性顶极相应出现森林、森林草原和典型草原等地带性顶极植被类型。从南向北随着热量变化出现暖温性赤松(Pinus densiflora)-栎树 ...
邹春静, 徐文铎, 郑元润
core +1 more source
利用1980年、1995年、2000年三期遥感影像,在RS与GIS支持下,解译提取吉林省西部20年草地空间信息,分析该区草地时空动态及其景观格局变化。结果表明:①20年来,草地面积减少40.70%。草地退化严重,主要转化为耕地和盐碱地,转移面积分别达到475799.43hm^2和303182.06hm^2;②20年来.草地总动态度为负,1980~1995年,高覆盖度草地对整体草地变化影响较大;1995-2000年.高、中覆益度草地对草地整体变化影响较大;③20年来,各类草地质心向东北方向偏移 ...
李建平, 赵江洪, 张柏, 张树清
doaj +2 more sources
ABSTRACT Additive manufacturing, commonly referred to as three‐dimensional (3D) printing, provides the geometric freedom and multi‐material integration needed to build soft medical robots for minimally invasive interventions, prosthetics, and rehabilitation.
Yao Wang +5 more
wiley +1 more source
ABSTRACT Why did Australia go from the White Australia Policy, which excluded non‐whites, to institutionalizing multiculturalism policy in the 1970s? This question defies traditional political ideologies of the major political parties, which had long supported the White Australia Policy. This article is a rare empirical demonstration of the Five‐Thread
Julius C. S. Mok
wiley +1 more source
为解决工程上变电站接地网故障诊断中建模耗时长、现场工作量大等实际问题,基于特勒根定理及最小二乘法编写可视化接地网故障诊断软件,实现接地网拓扑结构自动生成,并通过串行通讯接口RS-232将现场测量接地引下线端口电阻值自动传输至诊断软件,在输出界面中依据各支路导体电阻增量判断接地网状态。该诊断平台大大提高了接地网故障诊断效率,具有较好工程实用性。
刘渝根 +5 more
doaj
Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra +3 more
wiley +1 more source
配电网小电阻接地系统的供电可靠性较低,且存在高阻保护拒动的问题,而消弧线圈接地系统又难以选线。针对上述两种接地系统的缺陷,在结合二者各自优势的基础上提出一种中性点动态接地系统。利用中性点电压阈值比较及延时处理对单相接地故障性质进行区分,根据不同类型的故障采用不同的中性点接地方式,从而实现对故障的差异化处理。尤其是在解决高阻接地故障时,通过动作可切换电阻支路的开关来实现零序电流的二次增量,为故障选线提供基础信号。利用Simulink仿真验证该接地系统的可行性,仿真结果表明 ...
黄亚峰 +4 more
doaj +2 more sources
为了解决配电网中性点接地方式具有的人身安全、接地选线及供电可靠性问题,开发了基于故障相智能接地处理方式的配电网多功能安全接地处理装置,该装置采用了铁磁谐振动态预警判断技术、分区式故障相选相技术、故障性质的智能判断与处理技术和自适应接地选线技术解决了配电网铁磁谐振动态预警、判断与处理,解决了过渡电阻接地时的精准选相,解决了故障性质的智能判断与处理,能使瞬时性故障快速恢复,使永久性故障选线精确率提高到百分百,能处理0-2 000 A的故障电流。装置经在电网的试验及运行效果证明 ...
李政洋 +4 more
doaj

