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Suitability evaluation of underground space development in Dalian [PDF]

open access: yesE3S Web of Conferences, 2021
Rational development and utilization of urban underground space has become an important measure to alleviate the contradiction between supply and demand of land resources, improve urban capacity and optimize urban layout.
Mengmeng Gao   +6 more
doaj   +1 more source

Evaluation of water resources carrying capacity based on cultivated land and urban construction scale -- a case study of Jinzhou City [PDF]

open access: yesE3S Web of Conferences, 2021
Water resources play an important role in the natural environment, which is an irreplaceable resource for the survival and development of human society.
Mengmeng Gao   +5 more
doaj   +1 more source

Debris flow gully zoning and risk assessment based on numerical simulation [PDF]

open access: yesE3S Web of Conferences, 2023
In order to evaluate the zoning and risk of debris flow gully based on numerical simulation, a set of theoretical system and technical process of debris flow quantitative risk analysis suitable for mountainous towns in southwest China was constructed ...
Feng Zhen   +4 more
doaj   +1 more source

Study on The Test Methods of Heavy Metal in Exhaust Gas for a Copper Melting Factory [PDF]

open access: yesE3S Web of Conferences, 2022
The raw materials, auxiliary materials and production process of a typical copper smelting factory were investigated, the emission characteristics of exhaust gas pollutants produced by the production process were studied.
Wang Jing, Wang Jilu, Liu Zhenyu
doaj   +1 more source

Source Apportionment of Elemental Carbon in Different Seasons in Hebei, China

open access: yesFrontiers in Environmental Science, 2022
Black carbon (BC), also termed elemental carbon (EC), is a strong light-absorbing substance. It can disturb the radiation balance between the earth and atmosphere resulting in changing regional and global climate conditions.
Dongli Hou   +11 more
doaj   +1 more source

The thinking and practice of Marine Ecological Conservation Red Line Delineation in China [PDF]

open access: yesE3S Web of Conferences, 2021
China has established and implemented marine ecological conservation red line (MECRL) system to strengthen the bottom line constraints and ensure ecological security.
Zhao Bei   +4 more
doaj   +1 more source

Formulation of an evaluation index system of geological hazard data quality in China

open access: yesZhongguo dizhi zaihai yu fangzhi xuebao, 2021
This paper provides an exploratory study about data quality evaluation index system of geological hazard. To serve geological hazard research and national geological hazard prevention, select five dimensions of completeness, timeliness, accuracy ...
Chunrong YIN   +6 more
doaj   +1 more source

Simultaneous Determination of 51 Odorous Substances in Water by Headspace-Solid Phase Microextraction-Gas Chromatography/Triple Quadrupole Mass Spectrometry [PDF]

open access: yesZhipu Xuebao, 2023
A method of headspace-solid-phase microextraction-gas chromatography/triple quadrupole mass spectrometry was established for simultaneous determination of 10 types of 51 odorous substances in water. The effects of extraction head, extraction temperature,
LIU Jian-zhuo1   +4 more
doaj   +1 more source

Determination of Silver in Soil and Stream Sediments by ICP-MS/MS with Four Collision/Reaction Modes

open access: yesYankuang ceshi, 2022
BACKGROUND It is difficult to accurately determine the content of Ag in soil and sediment due to the mass spectrum interference of niobium, zirconium oxide and hydroxide during inductively coupled plasma-mass spectrometry (ICP-MS) analysis. OBJECTIVES To
LIU Yue   +4 more
doaj   +1 more source

Determination of Ammonium Nitrogen and Nitrate Nitrogen in Soil by Gas Phase Molecular Absorption Spectrometry

open access: yesYankuang ceshi, 2021
BACKGROUND Determination of ammonium nitrogen and nitrate nitrogen in soil makes great sense for indication of the nutrient status and environment evaluation of soil.
WU Hao   +4 more
doaj   +1 more source

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