Results 11 to 20 of about 1,639,929 (252)

Development and application of hobbing-cone hybrid PDC bit

Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023
In order to solve the problems of low ROP and short service life of the bit drilling in deep and hard formation, a new technology of hobbing-cone hybrid PDC bit which has combined the advantages of conventional PDC bit and the hobbing-cone is proposed in
Lian Chen, Qiang Cao, Qingliang Qi, Shiwei Niu, Yingxin Yang, Xu Chen, Zhijie Zhao, Bin Wu   +7 more
doaj   +2 more sources

Experimental research on torque characteristic and weight distribution of the polycrystalline diamond compact–roller hybrid bit

Advances in Mechanical Engineering, 2019
On the basis of structural features and working principle of polycrystalline diamond compact–roller hybrid drill bit, a detachable experiment device with adjustable structural parameters are designed and manufactured for the hybrid bit, and accordingly ...
Shi-wei Niu, Hua-lin Zheng, Ying-xin Yang, Xu Tong, Lian Chen, Yong Liu, Ze-jun Bao   +6 more
doaj   +2 more sources

Working characteristics research on the impacting–cutting hybrid bit

Advances in Mechanical Engineering, 2019
In order to improve the drilling efficiency of bit drilling in poor-drillability formation, the authors of this article put forward a cutting–percussion hybrid bit, the fixed-cutting units and impact-crushing units of which are mutually independent and ...
Kuilin Huang, Zhijiu Ai, Yingxin Yang
doaj   +2 more sources

Optimal Bit Allocation-Based Hybrid Precoder-Combiner Design Techniques for mmWave MIMO-OFDM Systems

IEEE Access, 2021
This work conceives techniques for the design of hybrid precoders/combiners for optimal bit allocation in frequency selective millimeter wave (mmWave) multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems, toward
Manjeer Majumder, Harshit Saxena, Suraj Srivastava, Aditya K. Jagannatham   +3 more
doaj   +3 more sources

Novel 1-bit hybrid reconfigurable intelligent surface [PDF]

Scientific Reports
Reconfigurable intelligent surfaces (RISs) are anticipated to play a key role in future smart wireless networks by enabling control over the propagation environment and improving communication performance.
Sajedeh Keshmiri, Suren Jayasuriya, Mohammadreza F. Imani   +2 more
doaj   +2 more sources

Enhancing privacy preservation and integrity in IoT-enabled wireless sensor networks through novel advanced cryptographic techniques [PDF]

Scientific Reports
This study presents a novel hybrid cryptographic model designed to enhance privacy preservation and data integrity in IoT-enabled Wireless Sensor Networks (WSNs).
Halima Sadia, Taj Rahman, Asif Rahim, Inayat Khan, Najeeb Ullah, Shabbab Ali Algamdi   +5 more
doaj   +2 more sources

Symbol and Bit Error Rates Analysis of Hybrid PIM-CDMA [PDF]

EURASIP Journal on Wireless Communications and Networking, 2005
A hybrid pulse interval modulation code-division multiple-access (hPIM-CDMA) scheme employing the strict optical orthogonal code (SOCC) with unity and auto- and cross-correlation constraints for indoor optical wireless communications is proposed. In this
Ghassemlooy Z., See C. K.
doaj   +3 more sources

FPGA Accelerator Design for Hybrid Precision Frequency Domain Convolutional Neural Network [PDF]

Jisuanji gongcheng, 2023
Deep Convolutional Neural Network(CNN) have large models and high computational complexity, making their deployment in Programmable Gate Array(FPGA) with limited hardware resources difficult.
Yi CHEN, Bosheng LIU, Yongqi XU, Jigang WU
doaj   +1 more source

Luby Transform Coding Aided Bit-Interleaved Coded Modulation for the Wireless Internet [PDF]

, 2007
Bit-Interleaved Coded Modulation using Iterative Decoding (BICM-ID) is amalgamated with Luby Transform (LT) coding. The resultant joint design of the physical and data link layer substantially improves the attainable Bit Error Rate (BER) performance.
T. D. Nguyen, Nguyen Dang, T, S. X. Ng, L.-L. Yang, R. Y. S. Tee, L. Hanzo, Ng, S, Tee, R, Yang, L-L, Hanzo, L   +9 more
core   +2 more sources

Self-adjusting force/bit blending control based on quantitative factor-scale factor fuzzy-PID bit control

Alexandria Engineering Journal, 2022
In order to improve the operation performance and environmental adaptability of the manipulator, it is essential to control the position and force of the manipulator simultaneously. This paper proposed a hybrid control method of auto-dynamic bit based on
Juntong Yun, Ying Sun, Cuiqiao Li, Du Jiang, Bo Tao, Gongfa Li, Ying Liu, Baojia Chen, Xiliang Tong, Manman Xu   +9 more
doaj   +1 more source