搜索结果: 1-15 共查到“compaction”相关记录53条 . 查询时间(0.079 秒)
Prediction of the effectiveness of rolling dynamic compaction using artificial neural networks and cone penetration test data
soil mechanics rolling dynamic compaction artificial neural networks cone penetration test ground improvement
2018/12/25
Rolling Dynamic Compaction (RDC)，which is a ground improvement technique involving non-circular modules drawn behind a tractor，has provided the construction industry with an improved ground compaction...
Growth and development of pistachio seedling root at different levels of soil moisture and compaction in greenhouse conditions
aeration stress bulk density pistachio rooting depth water deficit
2017/4/6
Soil moisture and compaction are important factors for growth and development of plant root. This study was conducted as a nested design with two factors and three replications to investigate the beha...
Conditions for instabilities in collapsible solids including volume implosion and compaction banding
Compaction band Deformation band Material instability Volume implosion
2015/7/1
We review conditions for material instabilities in porous solids induced by a bifurcation of solution into non-unique strain rate fields. Bifurcation modes considered include jumps in the strain rate ...
Considering the soil compaction status on logging areas in a Hyrcanian forest
cutting area slope timber harvesting tree volume
2015/5/18
This paper deals with the issue of soil compaction during timber harvesting operations on cutting areas.
Soil compaction was assessed following the logging operation in Darabkola forest area by meas...
Results of dynamic penetration test – an indicator of the compaction of surface soil horizons by forestry machinery
dynamic penetration test soil compaction soil mechanics lightweight dynamic penetrometer
2015/3/27
The objective of research was, on the basis of the exactly predefined input parameters of upper soil horizons of selected forest soils, to perform accurate measurements of the impact of soil loading b...
Possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils
deflection E-module PFWD soil bearing capacity soil compaction soil reaction
2015/3/20
The paper discusses possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils. Within the study, measurements were made using manu...
Soil compaction caused by 450C Timber Jack wheeled skidder (Shefarood forest, northern Iran)
soil compaction forest soil wheeled skidder
2015/3/6
In forest harvesting operations usually after using skidding machinery (skidders), traces of soil damage in the form of soil compaction and wheel and logs ruts can be seen in the forest soil. Soil bul...
Soil compaction as the possible cause of wilting and premature ripening of sunflower – Short Communication
sunflower roots premature ripening soil compression soil aeration
2015/2/6
Brown patches of the size from several square metres to hectares or individual dying plants appeared in otherwise green stands. Affected plants wilt and ripen sooner than healthy ones, causing them to...
The effect of the soil compaction on the contents of alfalfa root reserve nutrients in relation to the stand density and the amount of root biomass
alfalfa soil density root reserve nutriet
2015/1/30
The reserve root nutrients influence the overwintering, regrowth, yield, and persistence of alfalfa plants. The total amount of the root reserves is considered more important than their concentration....
Equation-free dynamic renormalization in a glassy compaction model
In combination with dynamic renormalization evolutionary dynamics accelerated simulator glass dynamic phenomenon
2014/12/25
Combining dynamic renormalization with equation-free computational tools, we study the apparently asymptotically self-similar evolution of void distribution dynamics in the diffusion-deposition proble...
Porosity and Lithology Prediction in Eve Field, Niger Delta Using Compaction Curves and Rock Physics Models
Compaction Trend Lithology Porosity Reservoir Characteristic
2013/3/7
The primary objective of this study is to investigate the porosity-depth trends of shales and sands and how they affect lithologies. Compaction curves from well logs of five wells were determined usin...
Long-term rice-based cropping system effects on near-surface soil compaction
Bulk Density Crop Rotation Soil Organic Matter Tillage
2013/3/4
Irrigated rice (Oryza sativa L.) production is as-sociated with frequent cycling between anaero-bic and aerobic conditions, which can lead to a greater rate of soil organic matter (SOM) de-composition...
农田土壤含水率和坚实度采集仪设计与试验（Design and Test on the Field Soil Moisture and Compaction Acquisition Instrument）
土壤 含水率 坚实度
2010/12/28
设计了可以定位、快速、同步测量农田土壤含水率和坚实度的采集仪。在探讨该仪器测量原理和软硬件设计的基础上,对其测量的准确性进行了试验分析。某苗圃地,选定5m×5m的30个采样点,用农田信息采集仪和烘干法分别测量各点的土壤含水率,并对测量值进行简单相关分析，其相关系数为0.9179,达到极显著性相关。以同样的方式,采用农田信息采集仪和SC900型数字土壤坚实度仪,分别测量30个采样点10cm和...
Effects of Soil Compaction by Tractor Traffic on reclaimed soil in Isahaya Bay
reclaimed field of Isahaya Bay soil compaction
2010/12/3
At a reclaimed field of Isahaya Bay, a vehicle running test was conducted using tractors, and the penetration resistance (cone index) of soil before and after the running was compared. From this resul...
Left Ventricular Non-compaction with Associated Anomalies:A Rare Congenital Cardiomyopathy
Left Ventricular Non-compaction Congenital Cardiomyopathy
2015/9/21
A 22-year-old man was admitted with chief complaint of dyspnea on exertion. The patient had a history of operation 10 years ago for coarctation of the aorta. Transthoracic echocardiography showed bicu...