Results 61 to 70 of about 4,394,413 (242)

Cross‐Scale Hierarchical Targeted Delivery System Based on Small‐Scale Magnetic Robots

Advanced Robotics Research, EarlyView.
This article reviews a cross‐scale hierarchical targeted delivery system that integrates magnetic continuum robots and magnetic microrobots. By combining rapid long‐range navigation with precise microscale targeting, the system overcomes key limitations of single‐scale approaches.
Junjian Zhou, Zhiqiang Chen, Yuanbiao Ma, Zhiqiang Tang, Qianqian Wang   +4 more
wiley   +1 more source

An Experimental and Numerical Simulation Study on Rock Cutting Based on Pre-Breaking

Shiyou jixie, 2019
The design of the mixed-cutter placement can only rely on the engineering experience. The combination of experiment and numerical simulation is used to study the rock breaking force and rock breaking efficiency of the PDC cutter under different pre ...
Liu Zhong, Hou Huihui, Hu Wei
doaj  

Mechanisms underlying lateral force applied to a PDC cutter on a PDC drill bit during rotary rock breaking

Meitian dizhi yu kantan
ObjectiveTo improve the rock-breaking efficiency and durability of drill bits in the theoretical research on the optimal design of drill bits, the key is to systematically reveal both the rock-breaking mechanisms of polycrystalline diamond compact (PDC ...
Jiusen WEI, Xin HAN, Wei LIU, Deli GAO
doaj   +1 more source

National Action Plan for Energy Efficiency, Chapter 6: Energy Efficiency Program Best Practices

, 2006
Chapter from the National Action Plan for Energy Efficiency documenting key findings from energy efficiency programs that have been successfully operating for many ...
National Action Plan for Energy Efficiency (U.S.)
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Technical Feasibility Study of Autonomous Field Robot‐Based on‐the‐go Assessment of Soil Nutrients Using Ion‐Sensitive Field‐Effect Transistors

Advanced Robotics Research, EarlyView.
Autonomous field robots equipped with ISFET‐based sensors enable rapid, spatially resolved soil nutrient analysis directly in the field. An automated system based on the BoniRob platform is presented for standardized on‐site extraction and measurement of key macronutrients and soil pH.
Vadim Riedel, Stefan Hinck, Edgar Peiter, Arno Ruckelshausen   +3 more
wiley   +1 more source

Dynamic Etching‐Induced Cl‐Terminated Ti3C2Clx/Ti3ZnC2 Heterostructure for Ammonia Electrosynthesis and Zinc‐Nitrogen Batteries

Advanced Science, EarlyView.
A stable Ti3C2Clx/Ti3ZnC2 heterostructure, fabricated by dynamic etching, exhibits outstanding electrocatalytic NRR activity (NH3 yield: 20.1 µg h−1 mg−1, FE: 38.1%) in alkaline media. The corresponding Zn‐N2 battery achieves a peak power density of 36.5 µW cm−2 and an NH3 yield of 13.1 µg h−1 mg−1, providing an advanced strategy for NH3 and ...
Yu Wang, Ying Sun, Liqun Ye, Jichi Liu, Hui Li, Yang Fu, Fengzhan Sun, Jieshan Qiu, Chang Yu, Tianyi Ma   +9 more
wiley   +1 more source

Magnetoelectric Nanoparticle‐Based Wireless Brain–Computer Interface: Underlying Physics and Projected Technology Pathway

Advanced Science, EarlyView.
Magnetoelectric nanoparticles (MENPs) enable fully wireless, minutely invasive neuromodulation, and potentially neural recording, by converting magnetic into electric and, conversely, electric into magnetic fields, respectively, at high spatiotemporal resolution.
Elric Zhang, Max Shotbolt, Mostafa Abdel‐Mottaleb, Shawnus Chen, Victoria Andre, Jieyuan Tian, Jonathan Shulgach, Max Murphy, Brian Noga, Ping Liang, Darcy Griffin, Douglas Weber, Marta Pardo, Salvador Pane, Sakhrat Khizroev   +14 more
wiley   +1 more source

Research on disc cutter excavation characteristics for different blade width based on numerical simulations and experiments

工程科学学报
This study addresses the abnormal failures, such as blade fractures and wear, encountered by disc cutters when excavating hard rock with high uniaxial compressive strength.
Yong SHANG, Jingdong SUN, Haifeng JIANG, Shunhai XU, Honglei DUAN, Chaoyang SUN   +5 more
doaj   +1 more source

Research on working principle and cross-track cutting characteristic of the axis-tilted rock-breaking tool

Advances in Mechanical Engineering, 2019
Concentric-track cutting method of a conventional polycrystalline diamond compact bit makes the bit suffer from inadequate rock-penetrating capacity and severely hinders the improvement of rock-breaking efficiency.
Haitao Ren, Yingxin Yang, Chunxiao Zhou, Shiwei Niu, Chunliang Zhang, Kuilin Huang   +5 more
doaj   +1 more source

UA Little Rock Seminar in Public History (HIST 7391) files on the Greater Little Rock Chamber of Commerce, 1999

, 1999
This collection contains the project report, interview transcripts, and audiocassette tapes from the University of Arkansas at Little Rock's Seminar in Public History's 1999 project, "Accomplishing Things Most People Think Just Happen: A History of the ...
University of Arkansas at Little Rock. Department of History.
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