Results 81 to 90 of about 4,494 (274)
Irrigation and Drainage, EarlyView.ABSTRACT Climate change is making water availability more uncertain, with growing consequences for the productivity and long‐term sustainability of tropical and subtropical fruit orchards. Mangifera indica L. and Persea americana Mill. both require large amounts of water to sustain growth and productivity.
Eleonora Cataldo
wiley +1 more source
An Analytical–Numerical Model for Determining “Drill String–Wellbore” Frictional Interaction Forces
EnergiesCurrently, drilling of directional oil and gas wells under complex technical-technological and mining-geological conditions requires the use of drill pipes made of various materials.
Michał Bembenek +7 more
doaj +1 more source
Proportional-Derivative Control of Stick-Slip Oscillations in Drill-Strings
MATEC Web of Conferences, 2018 Stick-slip oscillation in drill-string is a universal phenomenon in oil and gas drilling. It could lead to the wear of drill bit, even cause catastrophic failure of drill-strings and measurement equipment.
Lin Wei, Liu Yang
doaj +1 more source
Acoustical properties of drill strings [PDF]
, 1988 The recovery of petrochemical and geothermal resources requires extensive drilling of wells to increasingly greater depths. Real-time collection and telemetry of data about the drilling process while it occurs thousands of feet below the surface is an effective way of improving the efficiency of drilling operations.
openaire +2 more sources
Research on a Model of Nonlinear Coupled-vibration of Directional Well Drill String
, 2015 Drill string vibrations are inevitable movement patterns during drilling process, the drill string vibrations form including longitudinal, lateral and torsional are recognized by most scholars.
YAN, Tie +5 more
core +2 more sources
Journal of Clinical Psychology, Volume 81, Issue 6, Page 526-537, June 2025.ABSTRACT Deliberate Practice (DP) is a model of behavioral skill acquisition structured by several key tasks. The past decade has shown a consistent growth in interest in this form of learning for psychotherapy skills, with promising research suggesting DP training is superior to traditional learning methods of psychotherapy. This paper presents a case
Dan Sacks
wiley +1 more source
Permian Large Igneous Provinces and Their Paleoenvironmental Effects
Geophysical Monograph Series, Page 417-434., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jun Chen, Yi‐Gang Xu
wiley +1 more source
Journal of Parenteral and Enteral Nutrition, EarlyView.Abstract Background and Aims Within the original GLIM procedure (2019), the step on nutritional screening was not further elaborated. A new GLIM Risk of Malnutrition Working Group has recently developed a consensus‐based conceptual definition of “risk of malnutrition.” The present study aimed to operationalize this definition.
Marian A. E. de van der Schueren +19 more
wiley +1 more source
Drill String Drag and Torque Test Device Design
Shiyou jixie, 2019 The existing drag and torque theoretical model has many assumptions, leading to a large difference between the calculated value and the true value, which seriously restricts the study of the mechanical behavior of the drill string and the optimization of
吴泽兵 +4 more
doaj
Electric drill-string telemetry
, 2020 We design a numerical algorithm for simulation of low-frequency electric-signal transmission through a drill string. This is represented by a transmission line with varying geometrical and electromagnetic properties versus depth, depending on the ...
M Carcione, Jos E, Flavio Poletto
core