Results 131 to 140 of about 511,868 (299)

多行星排齿轮变速机构构型及效率研究

open access: yesJixie chuandong, 2014
Planetary gear train is the core of the automatic transmission(AT)and is the key part to decide the performance of the AT.Its efficiency varies with different structure types.Based on the planetary gear train of CX31,the structure characteristic is ...
许爱芬   +4 more
doaj  

SPS phase control system performance via analytical simulation [PDF]

open access: yes
A solar power satellite transmission system which incorporates automatic beam forming, steering, and phase control is discussed. The phase control concept centers around the notation of an active retrodirective phased array as a means of pointing the ...
Booth, R. W. D.   +3 more
core   +1 more source

Recomposable Layered Metasurfaces for Wavelength‐Multiplexed Optical Encryption via Modular Diffractive Deep Neural Networks

open access: yesAdvanced Functional Materials, EarlyView.
Modular diffractive deep neural network metasurfaces encode and reconstruct holograms across layer combinations and wavelengths, enabling secure, multifunctional operation. Each layer acts independently yet composes jointly, yielding up to m(2N −1) channels for m wavelengths and N layers.
Cherry Park   +4 more
wiley   +1 more source

Coupled vibration characteristics of a drive system during automatic transmission power shifting

open access: yesMeasurement + Control
To elucidate the vibration principle and effectively mitigate noise during power shifting in an automatic transmission, this study investigates a power split automatic transmission.
Chengyun Su   +4 more
doaj   +1 more source

Switchable Supramolecular Adhesive by Tuning Interfacial Bonding and Modulus

open access: yesAdvanced Functional Materials, EarlyView.
The supramolecular adhesive (HyDiP) shows reversible adhesion and recyclability. In the dehydrated state, it is dense, stiff (E ≈445 MPa), transparent, and provides strong bonding with adhesion strengths up to 4.65 MPa. In the hydrated state, it becomes porous, soft (E ≈0.11 MPa), and detaches easily, enabling sustainable high‐strength applications ...
Rumin Fu   +10 more
wiley   +1 more source

Surface Diffusion in SnTe‐PbTe Monolayer Lateral Heterostructures

open access: yesAdvanced Functional Materials, EarlyView.
The lateral heterostructures between 2D materials often suffer from the interdiffusion at the interfaces. Here, a surface diffusion mechanism is found to be dominating at the interfaces between semiconducting SnTe and PbTe monolayers. Atomically sharp interfaces can be achieved by suppressing this diffusion process. ABSTRACT The construction of complex
Jing‐Rong Ji   +9 more
wiley   +1 more source

Structural Porosity and Low Mineral Density in Enamel Rods Drive Molar Incisor Hypomineralisation

open access: yesAdvanced Functional Materials, EarlyView.
This study uses advanced imaging modalities on multiple length scales to show that molar‐incisor hypomineralization does not present as a locally homogeneous pathology. Instead, microstructural defects, characterized through non‐mineralized, protein‐rich sheaths and an altered mineral structure in between prism rods, resulting in local differences in ...
Katharina Jähn‐Rickert   +14 more
wiley   +1 more source

汽车自动变速技术的发展现状与展望

open access: yesJixie chuandong, 2010
The state-of-the-art of hydraulically automatic transmission is analyzed from the aspects of improving performance,transmission efficiency,and shift quality.And the research progress of shift quality enhancement by shortening the time of power ...
阴晓峰, 李磊, 廖志明, 王文平
doaj  

Modulating Interfacial Potential Gradients in Metal−Carbon Catalysts via Phase‐Engineering for Lithium–Sulfur Batteries

open access: yesAdvanced Functional Materials, EarlyView.
It is elucidated that phase engineering of cobalt modulates the interfacial potential gradients of cobalt–carbon electrocatalysts, enhancing the intrinsic electrocatalytic performance. Modulating the dominant crystalline phase of cobalt from a hexagonal close‐packed to a face‐centered cubic enriches the electron density of carbon shells, thereby ...
Ji‐Oh Kim   +13 more
wiley   +1 more source

自动变速器换档品质及其控制

open access: yesJixie chuandong, 2004
This paper gives a detailed analysis on the quality of automatic transmission shifting transient and finds out different factors influencing the quality of the shifting transient. Thus, it provides theoretic basis for controlling the arrangement of joint
李兴华   +3 more
doaj  

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