Results 51 to 60 of about 1,206,493 (389)

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

Design of a Load-Adaptive Transmitter Module for Micro-Resistivity Scanning Imaging Logging Tool

Cejing jishu
To address the insufficient adaptability of the transmitter module of the micro-resistivity scanning imaging logging tool under different well conditions, especially the insufficient emission current in high-resistivity drilling fluid environments which ...
LI Yuqi, SHI Juncheng, SHI Chao, YANG Jupeng, GUO Yingcai, XIAO Hong, MA Xueqing, BAI Tao   +7 more
doaj   +1 more source

Design and Application of Type 20 Quick Assembly Setting Tool

Cejing jishu, 2023
Plug setting tool is one of the key tools for plug and perforating operation in unconventional oil and gas reservoirs such as shale gas and tight sand gas. With the development of multistage fracturing volume stimulation techniques for unconventional oil
LU Yinghui, TANG Kai, LI Benchi, REN Guohui, NIE Jingwen, NIE Huafu   +5 more
doaj   +1 more source

occumb: An R package for site occupancy modeling of eDNA metabarcoding data

Population Ecology, EarlyView.
This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley   +1 more source

Effect Evaluation and Research of Bidirectional Shock Absorber Based on Measured Frequency of Downhole Perforation Detonation Wave

Cejing jishu, 2023
In the combined operation of tubing conveyed perforation (TCP) and drill stem test (DST), the perforator generates strong shock and vibration waves during perforation, which propagate around the explosion point through the connection link of the pipe ...
LI Benchi, TANG Kai, LU Yinghui, LUO Miaozhuang, CHEN Huabin, HUANG Renguo   +5 more
doaj   +1 more source

On log surfaces

Proceedings of the Japan Academy, Series A, Mathematical Sciences, 2012
This paper is an announcement of the minimal model theory for log surfaces in all characteristics and contains some related results including a simplified proof of the Artin-Keel contraction theorem in the surface case.
Fujino, Osamu, Tanaka, Hiromu
openaire   +4 more sources

Moving in the Dark: Enlightening the Spatial Population Ecology of European Cave Salamanders

Population Ecology, EarlyView.
We assessed individual interactions, movement ecology and activity patterns of a subterranean population of Speleomantes strinatii, applying spatial capture–recapture modeling to a photographic dataset of 104 individuals. ABSTRACT Space use and movement are fundamental aspects of organisms' ecology, mirroring individual fitness, behavior, and life ...
Giacomo Rosa, Andrea Costa, Sebastiano Salvidio   +2 more
wiley   +1 more source

Real-Time Estimation Method of P-Wave Slowness Based on Kalman Filtering and STC

Cejing jishu
The real-time extraction of acoustic interval time is of significant importance for rapidly evaluating reservoir quality and timely optimizing exploration and development decisions.
SUN Hao, CHEN Wenhui, SUN Xuekai, YU Weidong, LI Siyi, ZHAO Peng   +5 more
doaj   +1 more source

Research on synthetic rope and its future in timber harvesting [PDF]

, 2006
Steel wire rope is used for many logging applications. It has served the industry well in terms of strength, durability, and longevity. However, steel wire rope is difficult to use because it is stiff, heavy, and unyielding.
Garland, John, Hartter, Joel N., Leonard, Jared, Pilkerton, Steve   +3 more
core   +1 more source

Nut production in Bertholletia excelsa across a logged forest mosaic: implications for multiple forest use [PDF]

, 2015
Although many examples of multiple-use forest management may be found in tropical smallholder systems, few studies provide empirical support for the integration of selective timber harvesting with non-timber forest product (NTFP) extraction.
A Chávez, A Lawrence, A Lawrence, A Malmer, AD Johns, AE Duchelle, AE Duchelle, AE Duchelle, AE Duchelle, AJ Plumptre, B Hérault, Betxy Tabita Villarroel Panduro, BW Griscom, BW Griscom, C Baraloto, C Baraloto, C Benneker, C Cerdan Rojas, C García-Fernández, C Herrero-Jáuregui, C Padoch, C Sabogal, CA Klimas, CA Peres, CA Peres, CA Rockwell, Cara A. Rockwell, CL Staudhammer, CP Van Schaik, D Pearce, D Sheil, DP Dykstra, E Lima, E Ortiz, E Vidal, Edwin Eduardo Jurado Rojas, Eleanor Warren-Thomas, Eriks Arroyo Quispe, FE Putz, GH Shepard Jr, GS Amacher, GS Hartshorn, Harol Fernandez Silva, J Ghazoul, J Ghazoul, J Nabe-Nielsen, J Quaedvlieg, J Terborgh, JC Licona, JJ Scullion, JM Pires, JMT Haugaasen, Jonatan Frank Valera Tito, José Andrés Hideki Kohagura Arrunátegui, JQ Chambers, JS Denslow, JS Johns, Juan José Yucra Salas, Julia Quaedvlieg, JW Clay, KA Kainer, KA Kainer, KA Kainer, Kamal Bawa, L Rist, LB Fortini, LHO Wadt, LHO Wadt, Luis Alberto Meza Vega, M Menton, M Pinard, M Pinedo-Vasquez, M Schulze, M Schulze, M Soriano, M Tobler, M Zenteno, M Zenteno, M Zenteno, MA Pinard, MAF Ros-Tonen, Manuel R. Guariguata, Mary Menton, MC Cavalcante, MG Fonseca, MR Guariguata, MR Guariguata, MR Guariguata, MR Trivedi, MW Tobler, OL Phillips, Olivia Revilla Vera, P Barreto, P Cronkleton, P Shanley, P Shearman, P Sist, PA Zuidema, PB Camargo, PM Fearnside, PS Sujii, R Giudice, RE Cossío-Solano, RJW Brienen, Roger Quenta Hancco, RP Salomão, RR Sears, S Humphries, S Shackleton, S Vieira, SA Mori, SA Mori, SG Perz, SK Pattanayak, SV Coslovsky, T Haugaasen, T Panayotou, TJ Synnott, TP Holmes, TS Fredericksen, V Garrish, VM Viana, WC Cano   +122 more
core   +3 more sources