Results 81 to 90 of about 10,593 (242)

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

NASA Lewis Research Center low-gravity fluid management technology program [PDF]

, 1985
A history of the Lewis Research Center in space fluid management technology program is presented. Current programs which include numerical modeling of fluid systems, heat exchanger/radiator concept studies, and the design of the Cryogenic Fluid ...
Aydelott, J. C., Carney, M. J., Hochstein, J. I.   +2 more
core   +1 more source

Research on the Mechanism of Sand Bridge Stuck Drill in Deep Coal and Rock Gas Horizontal Wells

Energy Science &Engineering, EarlyView.
Accounting for wellbore collapse debris and the bulldozer effect, this study develops models for permeable and impermeable sand bridge sticking in deep CBM horizontal wells, deriving resistance and volume formulations. Validated in Changqing, results show impermeable bridges dominate; controls (fluid optimization, staged drilling, circulation, speed ...
Cheng Hui, Yong Ouyang, Zhifeng Duan, Xiaoyue Xu, Yuxiang Teng, Mingyang Liu, Hui Zhang, Long Chen   +7 more
wiley   +1 more source

A prototype submersible sheathless flow cytometer designed for autonomous platforms

Limnology and Oceanography: Methods, EarlyView.
Abstract Development of submersible flow cytometers has allowed for continuous, in situ measurements of natural assemblages of phytoplankton cells. Here we introduce DeepCyte, a sensitive prototype submersible flow cytometer developed for deployment on autonomous platforms.
J. E. Swalwell, K. Cain, E. V. Armbrust
wiley   +1 more source

Lubrication, Friction and Wear Characteristics of Textured Surface Slipper Pairs in Axial Piston Pumps

Lubricants
The study investigates the impact of textured surface parameters and pump operating parameters on the friction performance of slipper pairs in axial piston pumps.
Bin Bian, Zhiqiang Zhang, Lin Li, Qun Chao, Hao Yuan, Zhiqi Liu   +5 more
doaj   +1 more source

Convergence of Organ‐on‐a‐Chip and Freeform Printing of Sacrificial Poly(2‐cyclopropyl‐2‐oxazoline) Enables the Generation of Perfusable Endothelialized Channels in Hydrogels

Macromolecular Rapid Communications, EarlyView.
We employ freeform printing of thermo‐responsive poly(2‐oxazoline) to directly fabricate suspended sacrificial vascular templates within Organ‐on‐a‐chip devices. This enables circular, perfusable channels down to 200 µm without post‐processing.
Giulia Maria Di Gravina, Patrick Kuntschke, Zeno Guttenberg, Philipp Linke, Katja P. Schumann, Meike N. Leiske, Thomas Scheibel, Matthias Ryma   +7 more
wiley   +1 more source

Testing Intra-Industry Trade Between Portugal and Spain [1990-1996] [PDF]

This paper shows how, in the period 1990-1996, economic integration between the two Iberian economies has deepened through intra-industry trade. The enquiry was led at the level of the main forty traded products.
Horácio C. Faustino, J. R. Silva, Rita V. Carvalho   +2 more
core  

Resource reallocation across successive systemic innovations: How Rolls‐Royce shaped the evolution of the turbojet, turboprop, and turbofan

Strategic Management Journal, EarlyView.
Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani, Mariano Mastrogiorgio, Giuseppe Carignani   +2 more
wiley   +1 more source

Hydraulic In Vitro Characterization of MR‐Conditional Blood Pumps

Artificial Organs, EarlyView.
Cardiac surgery in neonates requires close placement of cardiopulmonary bypass machines due to limited blood volume, complicating MR compatibility. This study introduces three MR‐conditional blood pump prototypes. None interfered with MRI imaging, though RF‐related sensor effects remain untested.
Dominik T. Schulte, Marcel Renggli, Henning Richter, Francesca Del Chicca, Michael Hofmann, Martin O. Schmiady, Marianne Schmid Daners   +6 more
wiley   +1 more source

Research on Control Methods for the Pressure Continuous Regulation Electrohydraulic Proportional Axial Piston Pump of an Aircraft Hydraulic System

Applied Sciences, 2019
The objective of this paper is to design a pump that can match its delivery pressure to the aircraft load. Axial piston pumps used in airborne hydraulic systems are required to work in a constant pressure mode setting based on the highest pressure ...
Peng Zhang, Yunhua Li
doaj   +1 more source