Results 11 to 20 of about 355,354 (267)

An advanced hydraulic fracturing technique: Pressure propagation and attenuation mechanism of step rectangular pulse hydraulic fracturing

Energy Science & Engineering, 2023
Hydraulic fracturing technology has played a pivotal role as a key technology in shale gas development, but the geological environmental problems caused have been worrying the public.
Pei He, Zhaohui Lu, Zhi Deng, Yongkui Huang, Dawei Qin, Liming Ouyang, Menglai Li   +6 more
doaj   +1 more source

Elevated pulse pressure and its associations with demographic and clinical parameters in a clinically representative sample of outpatients with psychotic disorders

BJPsych Open, 2022
Elevated pulse pressure is associated with metabolic and neurocognitive diseases. Preliminary small-scale studies among patients with psychotic disorders have indicated that these patients had an increased pulse pressure compared with controls.
Christopher Holmberg, Jarl Torgerson, Andreas Gremyr   +2 more
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Impaired Central Pulsatile Hemodynamics in Children and Adolescents With Marfan Syndrome

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2017
BackgroundMarfan syndrome is characterized by aortic root dilation, beginning in childhood. Data about aortic pulsatile hemodynamics and stiffness in pediatric age are currently lacking.
Andrea Grillo, Paolo Salvi, Susan Marelli, Lan Gao, Lucia Salvi, Andrea Faini, Giuliana Trifirò, Renzo Carretta, Alessandro Pini, Gianfranco Parati   +9 more
doaj   +1 more source

Association of Pulse Pressure Difference and Diabetes Mellitus in Chinese People: A Cohort Study

International Journal of General Medicine, 2021
Chunlei Wu, Denhua Ma, Yu Chen Department of Cardiac Surgery, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, 317000, People’s Republic of ChinaCorrespondence: Yu Chen People’s Republic of ChinaEmail chenyu5835@126.
Wu C, Ma D, Chen Y
doaj  

Formation Principle and Characteristics of Self-Supercharging Pulsed Water Jet

Chinese Journal of Mechanical Engineering, 2022
High-pressure pulsed water jet technology has considerable development potential in the field of rock fragmentation. To overcome the shortcomings of existing pulsed jets, a self-supercharging pulsed water jet (SSPWJ) generation method is proposed, which ...
Zhaolong Ge, Yuanfei Ling, Jiren Tang, Yiyu Lu, Yangkai Zhang, Lei Wang, Qi Yao   +6 more
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Effect of pulse pressure on borehole stability during shear swirling flow vibration cementing. [PDF]

PLoS ONE, 2017
The shear swirling flow vibration cementing (SSFVC) technique rotates the downhole eccentric cascade by circulating cementing fluid. It makes the casing eccentrically revolve at high speed around the borehole axis.
Zhihua Cui, Chi Ai, Lei Lv, Fangxian Yin
doaj   +1 more source

Extraction and Evaluation of Discriminative Indexes of the Wearing Condition for High-Precision Blood Pressure Pulse Wave Measurement

Micromachines, 2022
In this paper, we report a new discriminant index for evaluating the wearing condition of a blood pressure pulse wave measurement device with small variability.
Yosuke Osawa, Tetsuji Dohi
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Wearable Multi-Channel Pulse Signal Acquisition System Based on Flexible MEMS Sensor Arrays with TSV Structure

Biomimetics, 2023
Micro-electro-mechanical system (MEMS) pressure sensors play a significant role in pulse wave acquisition. However, existing MEMS pulse pressure sensors bound with a flexible substrate by gold wire are vulnerable to crush fractures, leading to sensor ...
Xiaoxiao Kang, Lin Huang, Yitao Zhang, Shichang Yun, Binbin Jiao, Xin Liu, Jun Zhang, Zhiqiang Li, Haiying Zhang   +8 more
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Development of a Simulator Capable of Generating Age-Specific Pulse Pressure Waveforms for Medical Palpation Training

Applied Sciences, 2022
With the emergence of the metaverse and other human–computer interaction technologies, promising applications such as medical palpation training are growing for training and education purposes.
Dong-Jun Kim, Gwanghyun Jo, Jeong-Hoi Koo, Tae-Heon Yang, Young-Min Kim   +4 more
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Blood Pressure Estimation by Photoplethysmogram Decomposition into Hyperbolic Secant Waves

Applied Sciences, 2022
Photoplethysmographic (PPG) pulses contain information about cardiovascular parameters. In particular, blood pressure can be estimated using PPG pulse decomposition analysis, which assumes that a PPG pulse is composed of the original heart ejection blood
Takumi Nagasawa, Kaito Iuchi, Ryo Takahashi, Mari Tsunomura, Raquel Pantojo de Souza, Keiko Ogawa-Ochiai, Norimichi Tsumura, George C. Cardoso   +7 more
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