Results 71 to 80 of about 14,048 (222)

New Bit with Rolling PDC Cutter

Shiyou jixie, 2016
The new rolling PDC cutter drill bit technology could effectively address the fixed cutter eccentric wear issue,prolong durability,improve ROP,resulting in improved drilling efficiency and reduced drilling costs,which is a great step of drill bit ...
Shi Jiangang, Wu Xingyong, Dang Wenhui, Deng Ping, Liu Gang   +4 more
doaj  

Numerical Simulation of the Flow Field of the PDC Bit Supporting the Pulse Jet Based ROP Improvement Tool

Shiyou jixie, 2020
In order to give full play to the performance of the ROP improvement tool based on pulsed downhole alternating flow field, this paper studied its support PDC bit by means of numerical simulation.
Fan Jiqiang, Wang Guanjun, Wang Shengliang, Shi Huaizhong, Hou Xinxu, Li Shuowen   +5 more
doaj  

Photon counting for quantum key distribution with Peltier cooled InGaAs/InP APD's

, 2001
The performance of three types of InGaAs/InP avalanche photodiodes is investigated for photon counting at 1550 nm in the temperature range of thermoelectric cooling.
AndrÉ Stefanov, Damien Stucki, Gisin N., GrÉGoire Ribordy, Hughes R., Hugo Zbinden, John G. Rarity, Ribordy G., Tom Wall   +8 more
core   +2 more sources

Irradiated Tumor Cell‐Derived Microparticles Activate Systemic Anti‐Tumor Immunity via the STING/NLRP3/GSDMD Axis in Neutrophils

Advanced Science, Volume 13, Issue 16, 18 March 2026.
Radiotherapy induces tumor cells to release microparticles (RT‐MPs) into the circulation. The mitochondrial DNA carried by these RT‐MPs activates the STING/NLRP3/GSDMD axis in splenic neutrophils, triggering IL‐1β secretion. This, in turn, enhances dendritic cell function and facilitates the formation of cytotoxic T lymphocytes, thereby promoting ...
Yan Hu, Jiacheng Wang, Mengjie Che, Zheng Yang, Jingshu Meng, Xiao Yang, Yue Deng, Zhiyuan Zhou, Yijun Wang, Wenwen Wei, Zhanjie Zhang, Bian Wu, You Qin, Kunyu Yang, Honglin Jin, Fang Huang, Yajie Sun, Lu Wen, Chao Wan   +18 more
wiley   +1 more source

Experimental observation of the X-shaped near field spatio-temporal correlation of ultra-broadband twin beams

, 2012
In this work we present the experimental observation of the non factorable near field spatio-temporal correlation of ultra-broadband twin beams generated by parametric down conversion (PDC), in an interferometric-type experiment using sum frequency ...
Brambilla, E., Di Trapani, P., Gatti, A., Jedrkiewicz, O.   +3 more
core   +1 more source

Simulation Study on the Drilling of PDC Bit at Compound Drilling Condition

Shiyou jixie, 2016
The forces on the PDC bit at the bottomhole could impact the PDC bit drilling efficiency and cutter wear.The cutter-rock interactions could be more complex in compound drilling mode.A new PDC bit drilling simulation method for compound drilling based on ...
Zheng Jiawei, Kuang Yuchun, Wang Xia, Zou Ziyou, Chen Yuzhong, Yang Yingxin   +5 more
doaj  

Improving breaking efficiency of hard rock: Research on the mechanism of impact-shear rock breaking technology

Energy Exploration & Exploitation
To expedite drilling operations in hard rock of coal mines, a new type of impact-shear drill bit was developed, and its mechanism of speed-up and efficiency increase was studied.
Pei Ju, Dongzhuang Tian
doaj   +1 more source

Efficient polarization entanglement purification based on parametric down-conversion sources with cross-Kerr nonlinearity

, 2008
We present a way for entanglement purification based on two parametric down-conversion (PDC) sources with cross-Kerr nonlinearities. It is comprised of two processes.
Fu-Guo Deng, Hong-Yu Zhou, K. Chen, Yu-Bo Sheng   +3 more
core   +1 more source

Cutting Test Device for PDC Bit with Mixed Cutter Arrangement

Shiyou jixie, 2019
The existing PDC bit single-cutter test device is very inconvenient to adjust the parameters such as single-cutter rake angle. It is necessary to carry out frequent replacement of multiple sets of tools, which is not suitable for the mixed cutting ...
Liu Zhong, Hu Wei, Miao Mingcai, Hou Huihui   +3 more
doaj  

Experimental multi-location remote state preparation

, 2013
Transmission of quantum states is a central task in quantum information science. Remote state preparation (RSP) has the same goal as teleportation, i.e.
Bourennane, Mohamed, Radmark, Magnus, Wiesniak, Marcin, Zukowski, Marek   +3 more
core   +1 more source