Results 101 to 110 of about 2,421 (246)

Test on Bending Fatigue Damage of Full-size Drill String

Shiyou jixie, 2017
In the past, the study on the fatigue damage of drill string was mostly modeling or small-scale test, which could not accurately represent the fatigue damage of full-bore drill string.Based on the four-point bending fatigue test, taking the full-size ...
Cheng Caixia, Fan Jianchun, Hu Zhibin, Gao Weijun, Wu Jiafeng, Liu Shujie, He Yingming   +6 more
doaj  

Numerical Investigation of the Nonlinear Drill String Dynamics Under Stick–Slip Vibration

Vibration
This paper presents a comprehensive analysis of the influence of rotary table velocity, weight-on-bit, and viscous damping on the drill string stick–slip vibration.
Mohammad Javad Moharrami, Hodjat Shiri, Clóvis de Arruda Martins   +2 more
doaj   +1 more source

The effectiveness of implementation intentions in children: A systematic review and meta‐analysis

British Journal of Psychology, EarlyView.
Abstract Self‐regulation abilities in childhood are important for long‐term academic achievement and healthy development. As self‐regulatory abilities are still developing, ‘simple’ interventions are needed to foster self‐regulation. Implementation intentions are simple plans that could promote goal achievement in children.
Jasmin Breitwieser, Tilman Reinelt
wiley   +1 more source

Influence of Physical Parameters on Acoustic Transmission Characteristics of Drill String Channel

Shiyou jixie, 2019
The in-depth study of the transmission characteristics of sound waves in the drill string is of great significance for the development of sound transmission systems. The drill string is considered as pipeline composed of different uniform circular tubes.
Huang Mingquan, Zhao Guoshan, Tan Zhe
doaj  

Dynamic Characteristics of Horizontal Drilling with Flexible Drill String Based on ABAQUS Explicit Dynamics

Shiyou jixie
During the drilling of ultrashort-radius radial horizontal well with flexible drill string， the vertical shift of wellbore trajectory affects the encountering rate of target points.
Liu Xin Huang Zhongwei Wu Xiaoguang Li Gensheng Shi Huaizhong Wang Jiarui Wang Minghao, Huang Zhongwei, Wu Xiaoguang, Li Gensheng, Shi Huaizhong, Wang Jiarui, Wang Minghao   +6 more
doaj   +1 more source

ReTrace: Interactive Visualizations for Reasoning Traces of Large Reasoning Models

Computer Graphics Forum, EarlyView.
Abstract Recent advances in Large Language Models have led to Large Reasoning Models, which produce step‐by‐step reasoning traces. Such traces may offer insight into how models think, improving explainability and clarifying the underlying process. These traces, however, are often verbose and complex, making them cognitively demanding to comprehend ...
L. Felder, J. Miller, M. Wallinger, S. G. Kobourov, C. Chen   +4 more
wiley   +1 more source

Effects of restoration practices on biodiversity in temperate and boreal forests

Conservation Biology, EarlyView.
Abstract Several restoration practices are used to mitigate and compensate for the negative effects of large‐scale forestry on biodiversity in temperate and boreal forests. A comprehensive synthesis of the benefits of these practices across taxa is missing. We conducted a systematic review and meta‐analysis on this topic.
Malin Tälle, Thomas Ranius, Julia Koricheva   +2 more
wiley   +1 more source

Unexpected Promotion of Bone Regeneration by Inhibition of BMPR1A‐Mediated BMP Signalling

Cell Proliferation, EarlyView.
BMPR1A downregulation reduces ID1, releases TCF3 to activate GNG4‐PI3K‐AKT signalling, thereby promoting OPC proliferation and bone regeneration. ABSTRACT Bone morphogenetic protein (BMP) signalling plays a pivotal role in bone regeneration by regulating osteoprogenitor cell (OPC) function, and BMPs have been widely used in clinical treatment. However,
Zihao Zhou, Yun Zhai, Xiaochen Liu, Jiaojiao Shao, Jiani Zhou, Zhaoyang Li, Jiale He, Shuxian Lin, Qi Zhang   +8 more
wiley   +1 more source

Collagen Type VI Alpha 1 as a Regulator of Redox Homeostasis in Antioxidant‐Enhanced Osteogenesis of Dental Stem Cells

Cell Proliferation, EarlyView.
Under physiological conditions, NAC activates the PI3K‐AKT‐COL6A1 axis to sustain redox balance and enhance osteogenesis. COL6A1 deficiency, however, compromises this axis, inducing oxidative stress and impairing NAC's osteogenic efficacy. ABSTRACT Alveolar bone injury represents a prevalent clinical challenge in dentistry, for which stem cell‐based ...
Zhaosong Meng, Jiacheng Liu, Yue Zhang, Ruimeng Yang, Jingyi Zhang, Haosun Yang, Zheng Wang, Ran Wei, Zhe Li, Shuling Guo, Lizhi Hu, Lei Sui   +11 more
wiley   +1 more source

Effect of Bit Type on Reactive Torque and Consequent Tool-face-control Anomalies

Shiyou jixie, 2017
In sliding drilling with bend house mud motor, given the same WOB, the reactive torque is greater and the directional drilling is more difficult if the drill bit is more aggressive.
Xu Lihui
doaj