A5084153859- Gear and Bearing Dynamics Analysis
- Hydrology and Sediment Transport Processes
- Advanced machining processes and optimization
- Hydraulic flow and structures
- Heavy metals in environment
- Soil Carbon and Nitrogen Dynamics
- Coastal and Marine Dynamics
- Mechanical Engineering and Vibrations Research
- Peatlands and Wetlands Ecology
- Plant Water Relations and Carbon Dynamics
- Wind and Air Flow Studies
- Hydrology and Watershed Management Studies
- Fish Ecology and Management Studies
- Air Quality Monitoring and Forecasting
- Earthquake and Tsunami Effects
- Engineering Structural Analysis Methods
- Tunneling and Rock Mechanics
- Geochemistry and Geologic Mapping
- Air Quality and Health Impacts
- Geotechnical and Geomechanical Engineering
- Fluid Dynamics Simulations and Interactions
- Mycorrhizal Fungi and Plant Interactions
- Environmental Quality and Pollution
- Advanced Measurement and Metrology Techniques
- Soil erosion and sediment transport
Northwest A&F University
2024-2025
Hohai University
2006-2024
Institute of Soil and Water Conservation
2024
Changsha University of Science and Technology
2021-2022
Kunming University of Science and Technology
2013-2014
China National Petroleum Corporation (China)
2010
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering
2006-2007
Introduction It is unclear whether plants and microorganisms achieve niche complementarity by taking up different inorganic nitrogen (N) forms to alleviate N competition, particularly in N–limited regions. Methods This paper conducted a 15-day 15 tracer study ( NH 4 NO 3 or ) situ quantitatively calculate the uptake rates of four stands (pure Hippophae rhamnoides L, pure Pinus tabuliformis Carrière, mixed H. – P. , Artemisia gmelinii Weber ex Stechm grassland) forest–grassland transition...
This article introduced neural network, discusses the networks model and its learning process. Using MATLAB environment research analysis involute gear undercutting relationship, which under different pressure angles. In number of teeth or modulus has been scheduled apply nonlinear mapping characteristics to do a more accurate simulation. provides theoretical basis for angle in transmission design.
Establishing the corresponding relationship between radius at tooth tip and root fillet by curvature of conjugate flank based on generating method to manufacture for gears. According Visual Basic, a 2-D mathematical model undercutting phenomena modulus, teeth modification coefficient involute gear was built, then simulated influence level caused coefficient. The dynamic processes, profile drawing obtained simulation will directly reflect influences that with gears meshing processions,...
This paper analysis a steel chimney outer wall with spiral guide plate. Through calculation the structure modal, self-vibration and wind vibration frequency verify this can reduce load impact on flange connection. Achieve method of improved strength structure. The under resonant band is reduced effectively obtained more stable exterior structure, offered basis for transform in problem.
Study on minimum teeth without undercutting for considering the rack cutter’s addendum c*m of a kind gear with 14.5 degree pressure angle, and standard No is B436-1940 used in UK. Based generating method, reasons undercut phenomena analyzed, numbers involute spur gear, helical cylindrical bevel are theoretically analyzed figured out. The correct number angle given, also illustrated validity theoretical derivation.
Contrast analysis of the stub tooth involute gear with 22.5 degree pressure angle, and existing standard angle has been given in this study. Based on combination generating method, numerical calculations simulations, reasons undercut phenomena for are researched analyzed deeply. Minimum teeth without undercutting considering rack cutter’s addendum c*m is based traditional theory, which also illustrated validity theoretical derivation.
Study on a steel chimney outer wall with three spiral guide plates in this paper. Research the structure stability and static force analysis under wind loads by using ANSYS Workbench CFX fluid mechanics modular. To prove is more safe stable than old chimney. Provides new transformation basis of as ratio height to diameter large low flexural strength.
The principle of gear engagement and the relevant knowledge geometry were used to introduce dual meshing points involute-circular arc tooth in detail. At same time, use derived equation contact line profile describe process. Derive this formula coincidence degree calculate, order improve transmission theory gear. Combine equation, analysis, studies performance serve as a theoretical basis for design application.
This paper is based on the neural network nonlinear mapping characteristics. The involute gear tooth number, modulus and their relationship model of cutting amount effect are established respectively. Through MATLAB simulation gets relation curve between number teeth modulus. These curves can intuitive reflect effects change, which provides valuable theoretical reference for design gear.
Expandable cased-hole liners is to solve the sealing problem of level six multilateral wells. It a trigeminal expandable tube which usually prefabricated on ground and re-expanded when placed in proper position. In this paper, tubular compression molding process pre-forming stage mainly studied. process, both sides branch pipe should be compressed certain shape order successfully enter main borehole; meanwhile, we want make sure that failures such as rupture do not occur subsequent expansion...