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| 1 | Characterization of the aerosol chemical composition during the COVID-19 lockdown period in Suzhou in the Yangtze River Delta,China显示文摘To control the spread of COVID-19,rigorous restrictions have been implemented in China,resulting in a great reduction in pollutant emissions.In this study,we evaluated the air quality in the Yangtze River Delta during the COVID-19 lockdown period using satellite and ground-based data,including particle matter(PM),trace gases,water-soluble ions(WSIs) and black carbon(BC).We found that the impacts of lockdown policy on air quality cannot be accurately assessed using MODIS aerosol optical depth(AOD) data,whereas the tropospheric nitrogen dioxide(NO_(2)) vertical column density can well reflect the influences of these restrictions on human activities.Compared to the pre-COVID period,the PM_(2.5),PM_(10),NO_(2),carbon monoxide(CO),BC and WSIs during the lockdown in Suzhou were observed to decrease by 37.2%,38.3%,64.5%,26.1%,53.3% and 58.6%,respectively,while the sulfur dioxide(SO_(2)) and ozone(O_(3)) increased by 1.5% and 104.7%.The WSIs ranked in the order of NO_(3)~->NH_(4)^(+)>SO_(4)^(2-)>Cl~->Ca^(2+)>K^(+)>Mg^(2+)>Na + during the lockdown period.By comparisons with the ion concentrations during the pre-COVID period,we found that the ions NO 3-,NH 4 +,SO_(4)^(2-),Cl~-,Ca^(2+),K^(+) and Na^(+) decreased by 66.3%,48.8%,52.9%,56.9%,57.9% and 76.3%,respectively,during the lockdown,in contrast to Mg^(2+),which increased by 30.2%.The lockdown policy was found to have great impacts on the diurnal variations of Cl~-,SO_(4)^(2-),Na^(+) and Ca^(2+). | Honglei Wang Qing Miao Lijuan Shen Qian Yang Yezheng Wu Heng Wei Yan Yin Tianliang Zhao Bin Zhu Wen Lu | 2021 | Journal of Environmental Sciences2021，33，4： | 8 |
| 2 | Terahertz-dependent evaluation of water content in high-water-cut crude oil using additive-manufactured samplers显示文摘The evaluation of water content in crude oil is of significance to petroleum exploration and transportation.Terahertz(THz) waves are sensitive to fluctuations in the dipole moment of water.However,due to the strong absorption of water in the THz range,it is difficult for the THz spectrum to determine high water content with the common sampler.In this research,micron-grade samplers for THz detection were designed and manufactured using additive manufacturing(AM) technology.Oil-water mixtures with water content from 1.8%to 90.6%were measured with the THz-TDS system using sample cells.In addition,a detailed analysis was performed of the relationships among THz parameters such as signal peak,time delay,and refractive index as well as absorption coefficient and high water content(>60%).Results suggest that the combination of THz spectroscopy and AM technique is effective for water content evaluation in crude oil and can be further applied in the petroleum industry. | LiMei Guan HongLei Zhan XinYang Miao Jing Zhu Kun Zhao | 2017 | Science China(Physics,Mechanics & Astronomy)2017，60，4： | 3 |
| 3 | Thermal spallation in rock revealed by ultraviolet laser-induced voltage显示文摘In the petroleum industry, perforation plays an important role in the exploitation of oil and gas and a considerable number of studies have been conducted with the objective of improving the recovery rates of oil and gas (1,2)Lasers have been used to drill holes in a wide variety of rock types with the advantages of feasibility, cost, benefits, and environmental impact as determined by the Gas Technology Institute [1]. | Jing Zhu HongLei Zhan Kun Zhao XinYang Miao Qiong Zhou WenZheng Yue | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，7： | 2 |
| 4 | Application of THz technology in oil and gas optics显示文摘Fossil fuels currently satisfy^88%of China's energy demands.Oil-gas,known as the hydrocarbon occurred from various types of underground strata,is the most significant part of primary energy sources.Problems in oil-gas exploration,transportation and petrochemical affect the economic viability of the petroleum industry.Recently,the increasing complexity of stratigraphic condition and the fall in oil prices has made the situation more critical.Thus,questing for | XinYang Miao HongLei Zhan Kun Zhao | 2017 | Science China(Physics,Mechanics & Astronomy)2017，60，2： | 1 |
| 5 | Positioning for NLOS Propagation: Algorithm Derivations and Cramer-Rao Bounds 显示文摘 | Honglei Miao Kegen Yu Markku J Juntti | 2007 | IEEE Transactions on vehicular technology2007，56，5： | 1 |
| 6 | Leakage detection of oil tank using terahertz spectroscopy显示文摘The necessity for safety in oil-gas storage and transportation has led to increasing technical requirements for on-line monitoring of damaged pores and oil leakage from tanks. In this study, the severity of damage of the oil tank at the micron level was detected by terahertz time-domain spectroscopy(THz-TDS), which is of great significance for the early detection and prevention of oil leakage. The THz amplitude(EP) was related to the severity of damaged according to the THz-TDS measurement of oil tanks with various degrees of damage, including intact, partially damaged, completely damaged, and seriously damaged points.Absorption and scattering effects co-occurred when the THz wave penetrated the tanks, with the collective tendencies being used to expressly monitor oil leakage from tanks. When the oil tank was damaged to form micron-level pores and the crude oil had not overflowed, the pore size was close to THz wavelength and the Mie scattering effect was obvious. After further destruction of the pores, the crude oil gradually spilled over and the scattering effect was gradually transformed from Mie scattering to Rayleigh scattering. In addition, the polar molecules in crude oil have strong resonance under the irradiation of THz wave, and the THz wave has strong attenuation. Eventually, surface tension of the oil flattens the surface of the tank, the scattering effect is gradually suppressed and replaced by the absorption effect. Absorption and scattering caused by THz waves passing through tanks coexist and have competing relationships. The change rule of EPcan successfully prove the phenomenon and can be considered as an important alternative for application to predict the degree of tank damage. Therefore, in this study, the detection of pores as small as micrometers on the oil tank was expected to greatly prevent oil leakage accidents and improve the safety of oil and gas storage and transportation. | QIN FanKai CHEN SiTong CHEN Ru ZHAN HongLei MIAO XinYang XIANG WenFeng ZHAO Kun | 2021 | Science China(Technological Sciences)2021，64，9： | 1 |
| 7 | Terahertz-dependent PM2.5 monitoring and grading in the atmosphere显示文摘Rapid industrialization and economic development have led to serious pollution in the form of fine particulate matter(PM2.5,particulate matter with a diameter of less than 2.5 μm). In China, PM2.5 has been one of the most debated topics in councils of government and issues of public concern. Terahertz(THz) radiation was employed to measure the PM2.5 in the atmosphere from September 2014 to April 2015 in Beijing. Comparison of the PM2.5 level from the website with THz absorbance revealed a significant phenomenon: THz radiation can be used to monitor PM2.5 in the atmosphere. During Asia-Pacific Economic Cooperation(APEC) 2014, 'APEC Blue' was also recorded in a THz system. The relationship between absorbance and PM2.5 demonstrates that THz radiation is an effective selection for air pollution grading. Based on the absorbance spectra, the elemental compositions were studied by two-dimensional correlation spectroscopy(2 DCOS) in conjunction with X-ray fluorescence.Several single absorption peaks were revealed and caused by sulphate from coal combustion, vehicle exhaust emissions and secondary reactions. Furthermore, mathematical algorithms, such as the BPANN and SVM, can process the THz absorbance data and greatly improve the precision of the estimation of PM2.5 mass. Our results suggest that THz spectroscopy can not only reveal the component information for pollution source determination, but quantitatively monitor the PM2.5 content for pollution level evaluation. Therefore, the use of THz radiation is a new method for future air pollution monitoring and grading systems. | XinYang Miao HongLei Zhan Kun Zhao ZhenWei Zhang Lei Xu CunLin Zhang LiZhi Xiao | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，10： | 1 |
| 8 | Non-contacting characterization of oil-gas interface with terahertz wave显示文摘Dear Editors,The interface of oil and gas has been a key issue in the process of oil and gas storage and transportation,which is a preparatory work to improve the transport efficiency and prevent oil and gas leaks.There are many methods to characterize the interface of oil and gas,such as the ultrasonic transducers and multi-electrode capacitance level sensors.Recently,the ap- | DanDan Wang XinYang Miao HongLei Zhan Jin Wang Kun Zhao | 2016 | Science China(Physics,Mechanics & Astronomy)2016，59，7： | 0 |
| 9 | A suture-free, shape self-adaptive and bioactive PEG-Lysozyme implant for Corneal stroma defect repair and rapid vision restoration显示文摘limitation of donor tissue shortage clinically. In addition, suturing-needed transplantation potentially causes postoperative complications. Herein, we design a PEG-Lysozyme injective hydrogel as a suture-free, shape self-adaptive, bioactive implant for corneal stroma defect repair. This implant experiences a sol-gel phase transition via an in situ amidation reaction between 4-arm-PEG-NHS and lysozyme. The physicochemical properties of PEG-Lysozyme can be tuned by the components ratio, which confers the implant mimetic corneal modulus and provides tissue adhesion to endure increased intraocular pressure. In vitro tests prove that the implant is beneficial to Human corneal epithelial cells growth and migration due to the bioactivity of lysozyme. Rabbit lamellar keratoplasty experiment demonstrates that the hydrogel can be filled into defect to form a shape-adaptive implant adhered to native stroma. The implant promotes epithelialization and stroma integrity, recovering the topology of injured cornea to normal. A newly established animal forging behavior test prove a rapid visual restoration of rabbits when use implant in a suture free manner. In general, this work provides a promising preclinical practice by applicating a self-curing, shape self-adaptive and bioactive PEG-Lysozyme implant for suture-free stroma repair. | Hang Zhou Shaohua Zhang Miao Lei Yixin Cai Honglei Wang Jianguo Sun Jingyuan Cui Changsheng Liu Xue Qu | 2023 | Bioactive Materials2023，，11： | 0 |
| 10 | Characterizing the rock perforation process by laser-induced voltage response显示文摘In the petroleum industry,the exploitation of oil and gas is necessarily achieved by perforation,and a considerable number of research studies have been conducted with the objective of improving the recovery rates of oil and gas[1,2].New perforation methods are urgently needed to accelerate the development of energy resources.Drilling rock by laser is a non-contact process that can be used to drill holes in | Jing Zhu XinYang Miao Kun Zhao HongLei Zhan Qiong Zhou WenZheng Yue | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，5： | 0 |
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