Results 81 to 90 of about 4,489,694 (277)

Effect of tool geometry parameters on nano-cutting performance of polycrystalline zirconium

四川大学学报. 自然科学版
In this paper， the molecular dynamics method was used to simulate the diamond-tool cutting process of polycrystalline zirconium. The effects of tool geometric parameters， and the cutting force， temperature and surface quality of the workpiece were ...
ZHANG Xiao-Yu, PU Chao, HE Qi-Rong, SHI Yi-Chao, ZHANG Yu, KE Xi-Jing, TANG Jun, YANG Xing-Long   +7 more
doaj  

Built it, but did they come? Monitoring winter feeding station use by endangered long‐tailed gorals

The Journal of Wildlife Management, EarlyView.
Emergency feeding stations successfully supported endangered long‐tailed gorals during severe winter weather, with high utilization driven by snow depth. Because localized feed depletion triggered intraspecific conflict, managers should implement spatially dispersed feeding networks to optimize survival interventions for vulnerable populations ...
Jinhwi Kim, Donggul Woo
wiley   +1 more source

Stratospheric influence on tropical cyclone evolution

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We developed a metric based on moist static energy to detect and quantify the intrusion of stratospheric air into the inner core of tropical cyclones. High‐resolution numerical simulations show that this stratospheric interaction forms warm anomalies (high‐level warm cores) in the upper troposphere.
Andrea Davin, Giousef Alexandros Charinti, Caroline Muller, Andrea Polesello, Claudia Pasquero   +4 more
wiley   +1 more source

Multiscale controls on diurnal convection in the Maritime Continent: Insights from high‐resolution observations in Timika

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Across the Maritime Continent, diurnal rainfall variability is governed by interactions between regional‐scale atmospheric drivers and local land–sea breeze circulations. Afternoon convection is initiated over land by surface heating and propagates offshore, whereas morning rainfall develops over adjacent seas and moves inland under low‐level northerly
Dony Christianto, Robert S. Plant, Thorwald H. M. Stein, Steve J. Woolnough   +3 more
wiley   +1 more source

Aerodynamic Forces Acting on a Race Car for Various Ground Clearances and Rake Angles

Journal of Applied Fluid Mechanics, 2019
Computational model was developed to investigate aerodynamic forces acting on a closed-wheel race car. A particular focus was on the effects of ground clearance and rake angle on aerodynamic drag and lift forces.
I. Džijan, A. Pašić, A. Buljac, H. Kozmar   +3 more
doaj   +2 more sources

Simulation of single grain grinding in rail grinding based on SPH method

Jin'gangshi yu moliao moju gongcheng, 2016
In order to study the material removal mechanism of rail grinding,smoothed particle hydrodynamics(SPH)method is used to simulate the single grain cutting process of rail grinding.In this work,single grains with different geometries,cutting depths and ...
SHANG Wei, WANG Wenjian, GUO Jun, LIU Qiyue   +3 more
doaj  

A Study on the Propulsion Performance of Hybrid-Driven Underwater Glider Equipped with a Kappel Tip Rake Propeller

Applied Sciences
In order to solve the problem of the lack of maneuverability of the conventional underwater glider, this paper proposes a hybrid-driven underwater glider equipped with a Kappel tip rake propeller, analyzes the propulsion performance of different types of
Chen-Wei Chen, Jia-Lin Lu, Xu-Peng Chen, Dong-Jie Wang   +3 more
doaj   +1 more source

Dumpsite Seabed Characterization of the San Pedro Basin, CA, From Autonomous Vehicle Observations

Journal of Field Robotics, EarlyView.
ABSTRACT A wide‐area seabed survey was conducted using autonomous underwater vehicles (AUVs) in a known dumpsite off the coast of Southern California that has been found to have widespread sediment contamination from the chemical dichlorodiphenyltrichloroethane (DDT).
Ryan A. McCarthy, Dylan Kriegman, Sophia T. Merrifield, Heidi Batchelor, Eric J. Terrill   +4 more
wiley   +1 more source

Ultrasonically Assisted Single Point Diamond Turning of Optical Mold of Tungsten Carbide

Micromachines, 2018
To realize high efficiency, low/no damage and high precision machining of tungsten carbide used for lens mold, a high frequency ultrasonic vibration cutting system was developed at first.
Zhanjie Li, Gang Jin, Fengzhou Fang, Hu Gong, Haili Jia   +4 more
doaj   +1 more source

Directive Antenna Clutter Loss in Slant Paths

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT This paper investigates the development of a clutter loss model specifically for slant paths involving directive antennas. Conventionally, clutter loss is characterized by using isotropic antennas to facilitate standard link budget calculations via single antenna gain values.
Fernando Pérez Fontán, Vicente Pastoriza‐Santos, Fernando Machado Domı́nguez, Thomas Prechtl, Pavel Pechac   +4 more
wiley   +1 more source