Results 61 to 70 of about 16,608,990 (193)

Critical reflexivity in financial markets: a Hawkes process analysis

, 2013
We model the arrival of mid-price changes in the E-Mini S&P futures contract as a self-exciting Hawkes process. Using several estimation methods, we find that the Hawkes kernel is power-law with a decay exponent close to -1.15 at short times, less than ...
Bercot, Nicolas, Bouchaud, Jean-Philippe, Hardiman, Stephen J.   +2 more
core   +1 more source

Evaluation of Rice–Crayfish Field Fragmentation Based on Landscape Indices: A Case Study of Qianjiang City, China

Land
Since the 21st century, rice–crayfish fields have been widely distributed in the Yangtze River Basin in China. However, the spontaneous construction of these fields by farmers has given rise to the issue of rice–crayfish field fragmentation (RCFF) in ...
Lei Shi, Xu He, Bo Hu, Jiuwei Li, Lei Yu
doaj   +1 more source

Reconstructing Rural Settlements from a Living Space Perspective: Evidence from the Karst Mountainous Areas of Southwest China

Land
Rural settlements serve as the core spatial carriers of rural living space, and their spatial evolution and functional transformation reflect the dynamic restructuring of human–land relationships.
Qiuyu Zou, Xuesong Zhang, Jianwei Sun, Xiaowen Zhou, Hongjie Peng   +4 more
doaj   +1 more source

Drivers of Ocean Iron Stress Variability in High-Nutrient, Low-Chlorophyll Regions from Ocean Color

Ocean-Land-Atmosphere Research
Determining the seasonal, interannual, and decadal trends of Fe stress in oceanic regions helps quantify the variability in marine nutrient limitations.
James S. Lin, Robert T. Letscher
doaj   +1 more source

Straw and Green Manure Return Can Improve Soil Fertility and Rice Yield in Long-Term Cultivation Paddy Fields with High Initial Organic Matter Content

Plants
Returning straw and green manure to the field is a vital agronomic practice for improving crop yields and ensuring food security. However, the existing research primarily focuses on drylands and low-fertility paddy fields.
Hailin Zhang, Long Chen, Yongsheng Wang, Mengyi Xu, Weiwen Qiu, Wei Liu, Tingyu Wang, Shenglong Li, Yuanhang Fei, Muxing Liu, Hanjiang Nie, Qi Li, Xin Ni, Jun Yi   +13 more
doaj   +1 more source

Finite element analysis of tube drawing process with diameter expansion [PDF]

, 2019
This paper presents a tube drawing process with diameter expansion for producing a thin-walled tube effectively. In this proposed process, the tube was flared by a plug pushing into the tube, and then the tube was expanded by drawing the plug in the tube
Akasaka, Isamu, Akiyama, Masayoshi, Kajikawa, Shohei, Kawaguchi, Hikaru, Kuboki, Takashi, Terashita, Yuzo   +5 more
core  

The evolution of animal-based dietary structure has contributed to the increase of healthcare expenditures in China

Humanities & Social Sciences Communications
The trends of diversified diets in China have generated a growing number of nutritional health problems, and healthcare investment is bearing a large burden from the diets, hindering the economic progress of the country and its residents toward affluence.
Yuanyuan Zhu, Yan Zhang, Xiaohua Zhu, Yuan Luo, ZhenFa Tu   +4 more
doaj   +1 more source

Pigmentation of White, Brown, and Green Chicken Eggshells Analyzed by Reflectance, Transmittance, and Fluorescence Spectroscopy

ChemistryOpen, 2019
We report on the reflectance, transmittance and fluorescence spectra (λ=200–1200 nm) of four types of chicken eggshells (white, brown, light green, dark green) measured in situ without pretreatment and after ablation of 20–100 μm of the outer shell ...
Dr. Edwin Ostertag, Miriam Scholz, Julia Klein, Prof. Dr. Karsten Rebner, Prof. Dr. Dieter Oelkrug   +4 more
doaj   +1 more source

Micro-Ring Resonator Assisted Photothermal Spectroscopy of Water Vapor

Sensors
We demonstrated, for the first time, micro-ring resonator assisted photothermal spectroscopy measurement of a gas phase sample. The experiment used a telecoms wavelength probe laser that was coupled to a silicon nitride photonic integrated circuit using ...
Maria V. Kotlyar, Jenitta Johnson Mapranathukaran, Gabriele Biagi, Anton Walsh, Bernhard Lendl, Liam O’Faolain   +5 more
doaj   +1 more source

Cancer Discrimination Using Fourier Transform Near-Infrared Spectroscopy with Chemometric Models

Journal of Chemistry, 2015
Near-infrared (NIR) spectroscopy technique offers many potential advantages as tool for biomedical analysis since it enables the subtle biochemical signatures related to pathology to be detected and extracted.
Hui Chen, Zan Lin, Chao Tan
doaj   +1 more source