Results 31 to 40 of about 2,725,424 (194)

Occurrence of asbestos in soils: state of the art

Episodes, 2020
In the last decades, it has been widely demonstrated the risk to human health related to asbestos fibres exposure. Many studies have mainly focused on the mineralogical and geochemical characterization of ophiolites (i.e., serpentinite and metabasite rocks) since they are the main lithotypes associated with Naturally Occurring Asbestos (NOA ...
Ricchiuti C., Bloise A., Punturo R.
openaire   +3 more sources

Occurrence and recoverability of tight oil in Paleogene Funing Formation, Subei Basin

Shiyou shiyan dizhi, 2020
The shale, interlayers and adjacent carbonate rocks and siltstones in the second and fourth members of the Paleogene Funing Formation in the Subei Basin were studied using multi-temperature pyrolysis and NMR.
Jinning PENG, Qi QIU, Dongyan WANG, Zhiming LI, Jianhui ZHU, Shiyou LIANG, Yingli WU   +6 more
doaj   +1 more source

Occurrence states and potential influencing factors of shale oil in the Permian Fengcheng Formation of Mahu Sag, Junggar Basin

Shiyou shiyan dizhi, 2021
Taking the Permian Fengcheng Formation of the Mahu Sag of the Junggar Basin as an example, a systematic study of shale oil was carried out for the occurrence states and potential influencing factors by integrating various data including cores, well ...
Zhifeng YANG, Yong TANG, Xuguang GUO, Liliang HUANG, Ziqiang WANG, Xinmei ZHAO   +5 more
doaj   +1 more source

Texture-based crowd detection and localisation [PDF]

, 2012
This paper presents a crowd detection system based on texture analysis. The state-of-the-art techniques based on co-occurrence matrix have been revisited and a novel set of features proposed.
A.C. Davies, L. Breiman, R.M. Haralick, S.J. McKenna, Y. Freund   +4 more
core   +1 more source

Occurrence of normally-pressured shale gas in China and the United States and their effects on mobility and production: A case study of southeast Sichuan Basin and Appalachia Basin

Youqicang pingjia yu kaifa, 2022
Normal pressure shale gas plays such as the Ohio Formation Shale and Marcellus Formation Shale in the Appalachian Basin in the U.S. have been developed commercially.
JIANG Shu, LI Chun, CHEN Guohui, GUO Tonglou, WU Yuyuan, HE Xipeng, GAO Yuqiao, ZHANG Peixian   +7 more
doaj  

Stepwise Extraction Study on the Occurrence of Uranium in Tongren Bahuang Phosphorite, Guizhou

Yankuang ceshi, 2018
BACKGROUND Previous studies have found that phosphorite deposits in Tongren Bahuang of Guizhou Province is rich in the radioactive element uranium.
WANG Zhi-gang, XIE Hong, YANG Xu, ZHOU Zhong-rong   +3 more
doaj   +1 more source

Hydrogen sulfide occurrence states in China's coal seams [PDF]

Energy Exploration & Exploitation, 2021
The occurrence states of hydrogen sulfide in coal seams are crucial in preventing and controlling hydrogen sulfide emission in coal mines and the safe development of coal bed methane. In this study, the research status of the occurrence states of free-state, adsorbed-state, and water-soluble hydrogen sulfide in coal seams was systematically analyzed ...
Shengbo Yang, Haichao Wang, Xuehai Fu, Jijun Tian, Fangyu Zhao, Ze Wang, Pichen Sun, Yuzhao Cao   +7 more
openaire   +2 more sources

Occurrence State of Lithium of a Greisen-Type Lithium Deposit in the Porphyry Sn-Ore Field, Southern Jiangxi Province

Yankuang ceshi
Greisen-type Li ore, a new type of lithium ore in recent years, is of great theoretical research and economic value. However, there is slightly insufficient in comprehensive evaluation of greisen-type Li ore in such a world-class Nanling W-Sn ...
Jinhua QIN, Shanbao LIU, Zhiqiang GUO, Chenghui WANG, Shude ZHANG, Xianyuan ZHONG   +5 more
doaj   +1 more source

Occurrence of hemophilia in the United States [PDF]

American Journal of Hematology, 1998
An active surveillance system was used to identify all residents with hemophilia in six U.S. states (Colorado, Georgia, Louisiana, Massachusetts, New York, and Oklahoma). A hemophilia case was defined as a person with physician-diagnosed hemophilia A or B and/or a measured baseline factor VIII or IX activity (FA) of 30% or less.
J. Michael Soucie, Bruce Evatt, Debra Jackson   +2 more
openaire   +1 more source

Determining a quantum state by means of a single apparatus [PDF]

, 2003
The unknown state $\hrho$ of a quantum system S is determined by letting it interact with an auxiliary system A, the initial state of which is known. A one-to-one mapping can thus be realized between the density matrix $\hrho$ and the probabilities of ...
A. E. Allahverdyan, C. M. Caves, C. W. Helstrom, E. C. Kemble, R. Balian, R. G. Newton, Th. M. Nieuwenhuizen, U. Leonhardt, W. Band, W. Pauli   +9 more
core   +3 more sources