Results 31 to 40 of about 1,805 (143)

An Adaptive Control Method for the Distribution Valve of a Digital Pump

Machines, 2023
Perfect flow distribution is extremely important and essential for digital pumps. However, the fluctuation of motor speed and the change of valve dynamic characteristics cause the flow distribution flaw, which generates the backflow of the oil in the ...
Daling Yue, Xiukun Zuo, Zengguang Liu, Yinshui Liu, Liejiang Wei, Yuyang Zhao   +5 more
doaj   +1 more source

Astrocytic Phenotypic Switching in Posterior Piriform Cortex Orchestrates Bone Cancer Pain–Depression Comorbidity via Purinergic–Noradrenergic Signaling

Advanced Science, EarlyView.
Bone cancer pain and depression share a common origin: astrocytic A2‐to‐A1 transition in the posterior piriform cortex. This phenotypic shift disrupts the ATP–adenosine–A2AR–norepinephrine axis, simultaneously driving nociceptive and affective dysfunction.
Jiang‐Ping Liu, Jun‐Han Zhang, Zhi‐Xuan Tan, Wei‐Bing Yan, Ya‐Ru Yuan, Yao Liu, Bing‐Di Wei, Meng‐Qi Ding, Zhuo‐Min Fu, Ying Liu, An‐Qi Wang, Lin Ma, Yong‐Hong Li, Er‐Qing Chai, Chao‐Jun Wei   +14 more
wiley   +1 more source

Liquid‐Assisted Single‐Layer Janus Membrane for Efficient Unidirectional Liquid Penetration

Advanced Science, 2022
Unidirectional liquid penetration plays an important role in many fields, such as microfluidic devices, biological medical, liquid printing, and oil/water separation.
Zhihong Zhao, Yuzhen Ning, Shuang Ben, Xudong Zhang, Qiang Li, Cunming Yu, Xu Jin, Kesong Liu, Lei Jiang   +8 more
doaj   +1 more source

A Smart Fluid‐Hydraulic System Based on MRF Valve Control and Its Application in Flexible Grasping

Advanced Science, EarlyView.
This study introduces a smart fluid hydraulic system using MRF valve control for flexible gripping. An MRF‐MSV with an integrated excitation coil and micro‐textured damping channels is designed and validated; micro‐texturing increases hydraulic resistance. Coupled with a soft actuator, the MRF‐MSV enables dynamic bending and grasping.
Linfeng Huo, Hui Ji, Ruidong Hong, Songlin Nie, Fanglong Yin, Zhonghai Ma   +5 more
wiley   +1 more source

Research on the Volumetric Efficiency of 2D Piston Pumps with a Balanced Force

Energies, 2020
Axial piston pumps with high rotational speeds are required in many fields to increase the power-to-weight ratio. However, three main sliding friction pairs in the pump restrict the increase in rotational speed.
Yu Huang, Jian Ruan, Yong Chen, Chuan Ding, Sheng Li   +4 more
doaj   +1 more source

Drop‐Location‐Insensitive Droplet‐Based Electricity Generator Using Polydimethylsiloxane Slippery Covalently Attached Liquid Coatings

Advanced Science, EarlyView.
Drop‐location sensitivity remains a key barrier to practical droplet‐based electricity generators (DEGs). Here, a polydimethylsiloxane slippery covalently attached liquid (PDMS‐SCAL)‐coated interface promotes droplet sliding instead of splitting or bouncing, allowing stable electricity generation from randomly falling raindrops. The resulting PDMS‐SCAL‐
Jung Bin Yang, Donghyeon Yoo, Hideaki Teshima, Donghan Lee, Dongwhi Choi, Dong Rip Kim, Nenad Miljkovic   +6 more
wiley   +1 more source

Fabrication of a Composite Groove Array Surface with Gradient Wettability Which Delivers Enhanced Lubrication Performance

Lubricants
A novel composite groove array surface was fabricated using femtosecond laser ablation technology to enhance self-replenishment capability. Initially, the driving efficiency of droplets on the composite groove array surface was tested using a high-speed ...
Tianrui Zhang, Chenglong Liu, Xinming Li, Feng Guo, Kongmin Zhu   +4 more
doaj   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source

Reuse treatment technology of fracturing backflow fluid and its application in Wuqi Oilfield

Gongye shui chuli
The fracturing backflow fluid in Wuqi(WQ) Oilfield has problems such as large quantity, high viscosity, and difficult treatment, and the environmental situation is extremely severe.
CHEN Gang, WANG Weilong, YANG Shuisheng, LI Chen, ZHU Jinyan, SHEN Taizhi, HONG Xi   +6 more
doaj   +1 more source

An evaluation method of volume fracturing effects for vertical wells in low permeability reservoirs

Petroleum Exploration and Development, 2020
To evaluate the fracturing effect and dynamic change process after volume fracturing with vertical wells in low permeability oil reservoirs, an oil-water two-phase flow model and a well model are built.
Anshun ZHANG, Zhengming YANG, Xiaoshan LI, Debin XIA, Yapu ZHANG, Yutian LUO, Ying HE, Ting CHEN, Xinli ZHAO   +8 more
doaj   +1 more source