Results 1 to 10 of about 3,103 (156)
Water-holding Capacity of Reclaimed Grassland with Different Ages in Karst Regions [PDF]
, 2023 [Objective] The water-holding capacity of reclaimed grassland of different ages was studied in order to provide a scientific basis for water retention and soil and water conservation of reclaimed grassland in karst regions.
Li Xuemei +3 more
core +1 more source
Ecological Protection Effects Provided by Sand Barriers in a Grassland Mining Area [PDF]
, 2023 [Objective] The wind protection effectiveness of different sand barriers and their effects on surface soil particle size composition, soil nutrients and vegetation growth werer studied in order to provide a theoretical basis for the optimal selection of ...
Cong Longyu +5 more
core +1 more source
Rare Metals, Volume 42, Issue 11, Page 3718-3728, November 2023., 2023 Graphical abstract Abstract A flexible carbon fiber‐confined yolk‐shelled silicon‐based composite is reported as an anode material for lithium storage applications. Silicon nanoparticles (Si NPs) are confined by the N‐doped hollow carbon cages (Si‐NHC) and these uniform dispersed yolk‐shell‐structured Si‐NHC units were encapsulated by the carbon fibers
Dong‐Chen Jia +8 more
wiley +1 more source
Effects of Artificial Cyanobacterial Crust on Soil Wind Erosion Control in Arid Regions [PDF]
, 2023 [Objective] The influence factors of artificial cyanobacterial crust on soil threshold wind velocity and wind erosion rate, and the effects of wind erosion prevention and control were analyzed, and the feasibility of using artificial cyanobacterial crust
Gao Liqian, Huang Minghui, Zhao Yunge
core +1 more source
Transverse mixing of binary solid materials in a rotating kiln [PDF]
, 2016 In order to investigate the effect of particle size difference and density difference on the mixing mechanism of binary granular materials within a rotating kiln, a kinematic model of particles was established using the discrete element method, and the ...
CHEN Hui +4 more
core +1 more source
, 2018 本文以工业硅粉（600目）为原料,通过高能球磨和热解包碳方法制备了碳包覆纳米硅,在此基础上采用简单的机械球磨方法制备了碳包覆/石墨复合材料,并系统研究了碳包覆量及硅/石墨比例对碳包覆硅/石墨复合材料电化学性能的影响.与商业纳米硅粉/石墨复合材料相比,工业硅粉/石墨复合材料的循环性能及倍率性能均得到改善.通过高能球磨和热处理法得到的碳包覆材料为无定形碳和晶态硅材料的复合,所获碳包覆硅材料一次颗粒的粒径在100～200 nm左右.碳包覆量对材料的电化学性能有着重要影响,Si/C-2 ...
高天一, 龚正良
core +1 more source
Shuitu Baochi Xuebao, 2021 为探明浑水不同泥沙颗粒级配对入渗规律及致密层形成特性的影响，通过室内土柱垂直入渗试验，选取4种不同物理性黏粒含量的泥沙（5.59%，9.87%，18.43%，39.43%），研究落淤层厚度、湿润锋运移距离、累积入渗量随入渗时间变化特征，并测定落淤层和入渗结束后不同深度（0—1，1—2 cm土层）土壤的颗粒级配。结果表明：浑水泥沙中物理性黏粒含量越大，落淤层厚度越大；同一入渗时刻湿润锋运移距离和单位面积累积入渗量随物理性黏粒含量的增大而减小。落淤层厚度随时间变化符合幂函数关系（R2 > 0.9 ...
康守旋 +4 more
doaj
Shuitu Baochi Xuebao, 2006 利用地统计学方法，在两个尺度下对蘩顶山茶园土壤颗粒组成的空间变异性进行了研究。结果表明：（1）小尺度下土壤颗粒组成各粒级均具有强烈的空间相关性．其中粘粒的空间相关距最大．粗粉粒的空间相关距最小；土壤颗粒组成各粒级主要在东、东南和东北3个方向上具有较强的空间变异，除砂粒外的其它颗粒均在东南方向空间变异明显；各粒级的空间分布没有明显的规律可寻。（2）微尺度下只有粘粒具有强烈的空间相关性，砂粒具有中等空间相关性，其余粒级空间相关性很弱，粘粒空间相关距最小；除砂粒外的其它粒级在东南方向具有明显的空间变异 ...
冯娜娜 +4 more
doaj +2 more sources
Prenatal Exposure to Airborne Particulate Matter on the Development of Heart in Rat Fetus [PDF]
, 2015 大气颗粒物（ParticulateMatter，PM）是指悬浮在大气中的固体、液体颗粒物的总称。不同来源的颗粒物形成条件不同，其粒径分布、化学组成也不同。目前国际公认的对人类健康危害较大且研究较多的大气颗粒污染物是PM2.5（FineParticulateMatter）和PM10（InhalableParticulateMatter）[1]。越来越多的证据表明，PM严重威胁着人体的健康，更对孕妇及胎儿的发育产生不良影响，导致出生缺陷儿增多，使出生人口质量下降，增加死亡率。因此 ...
龙燕
core
Response Characteristics of Soil Saturated Hydraulic Conductivity after Returning Orchard to Farmland on the Loess Plateau [PDF]
[Objective] To explore the change rule and influencing factors of soil saturated hydraulic conductivity (Ks) after returning orchard to farmland. [Methods] Aging apple orchards (AO) and orchards with different tillage years (2 a, 4 a, 6 a, 10 a) on the ...
JIA Xiaoxu +6 more
core +1 more source