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Spectral emittance measurements of micro/nanostructures in energy conversion: a review

Shiquan SHAN, Chuyang CHEN, Peter G. LOUTZENHISER, Devesh RANJAN, Zhijun ZHOU, Zhuomin M. ZHANG

Frontiers in Energy 2020, Volume 14, Issue 3,   Pages 482-509 doi: 10.1007/s11708-020-0693-0

Abstract: Among the various radiative properties, spectral emittance is of integral importance for the design andThis paper presents an overview of the spectral emittance measurement techniques using both the direct

Keywords： concentrating solar power (CSP)     emittance measurements     high temperature     micro/nanostructure     selective    

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Answer for questions of repeated measurements of variance analysis and distribution test of data — Authors

Frontiers of Medicine 2022, Volume 16, Issue 4,   Pages 661-664 doi: 10.1007/s11684-021-0907-9

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Application and evaluation of optical distance measurements in geometrical quality testing of microgears

Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 261-269 doi: 10.1007/s11465-010-0100-3

Abstract: Microgears are increasingly important in industry. Compared to normal gears, the quality assurance of microgears needs more accurately measured data and simple but feasible measurement methods because of their dimension particula

Keywords： microgear     optical distance measurement     profile deviation     CWL sensor     micromechanical technology (MMT)    

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NITROGEN CYCLING AND ENVIRONMENTAL IMPACTS IN THE SUBTROPICAL HILLY REGION OF CHINA: EVIDENCE FROM MEASUREMENTS

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 3,   Pages 407-424 doi: 10.15302/J-FASE-2022448

Abstract:

● Soil nitrogen fluxes and influencing factors were reviewed in the subtropical hilly regions.

Keywords： nitrogen cycling     soil nitrogen     nitrogen deposition     greenhouse gases emission     non-point source pollution     nitrogen use efficiency    

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Operando modeling and measurements: Powerful tools for revealing the mechanism of alkali carbonate-based

Frontiers in Energy 2023, Volume 17, Issue 3,   Pages 380-389 doi: 10.1007/s11708-023-0872-x

Abstract: This paper proposed that operando modeling and measurements are powerful tools to understand the mechanism

Keywords： CO2 capture     carbonation     theoretical modeling     operando techniques     reaction visualization    

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δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1414-6

Abstract:

• Challenges in sampling of NH3 sources for d15N analysis are highlighted.

Keywords： Aerosol ammonium     Atmospheric gaseous ammonia     Isotope fingerprinting     Isotope-based source apportionment     Ammonia gas-to-particle conversion    

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Field measurements on microclimate in residential community in Guangzhou, China

Zhuolun CHEN, Lihua ZHAO, Qinglin MENG, Changshan WANG, Yongchao ZHAI, Fei WANG,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 462-468 doi: 10.1007/s11709-009-0066-6

Abstract: Taking a certain housing in Guangzhou as an example, we conduct the field measurement of the microclimate at fixed points for air temperature, relative humidity, black globe temperature and wind speed, etc. We investigate the effects of manmade lake, shade of trees and ground surface character on outdoor thermal environment, and make a quantitative analysis on the weighting position of the landscape design factors in design behavior. The study intends to explore a method to improve the thermal environment of residential quarters by changing the corresponding factors.

Keywords： microclimate     outdoor thermal environment     air temperature     black globe temperature     wind speed    

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Diffusive gradients in thin films using molecularly imprinted polymer binding gels for in situ measurements

Ying Cui, Feng Tan, Yan Wang, Suyu Ren, Jingwen Chen

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1290-5

Abstract: Abstract • Selective molecularly imprinted polymer (MIP) binding gel was prepared. • MIP-DGT showed excellent uptake performance for antibiotics. • In situ measurement of antibiotics in wastewaters via MIP-DGT was developed. • The MIP-DGT method was robust, reliable, and highly sensitive. Urban wastewater is one of main sources for the introduction of antibiotics into the environment. Monitoring the concentrations of antibiotics in wastewater is necessary for estimating the amount of antibiotics discharged into the environment through urban wastewater treatment systems. In this study, we report a novel diffusive gradient in thin films (DGT) method based on molecularly imprinted polymers (MIPs) for in situ measurement of two typical antibiotics, fluoroquinolones (FQs) and sulfonamides (SAs) in urban wastewater. MIPs show specific adsorption toward their templates and their structural analogs, resulting in the selective uptake of the two target antibiotics during MIP-DGT deployment. The uptake performance of the MIP-DGTs was evaluated in the laboratory and was relatively independent of solution pH (4.0–9.0), ionic strength (1–750 mmol/L), and dissolved organic matter (DOM, 0–20 mg/L). MIP-DGT samplers were tested in the effluent of an urban wastewater treatment plant for field trials, where three SA (sulfamethoxazole, sulfapyridine, and trimethoprim) and one FQ (ofloxacin) antibiotics were detected, with concentrations ranging from 25.50 to 117.58 ng/L, which are consistent with the results measured by grab sampling. The total removal efficiency of the antibiotics was 80.1% by the treatment plant. This study demonstrates that MIP-DGT is an effective tool for in situ monitoring of trace antibiotics in complex urban wastewaters.

Keywords： Diffusive gradients in thin films     Molecularly imprinted polymers     Selective uptake     Antibiotics     Passive sampling    

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Peroxyacetyl nitrate measurements by thermal dissociation–chemical ionization mass spectrometry in an

Xinfeng Wang, Tao Wang, Likun Xue, Wei Nie, Zheng Xu, Steven C. N. Poon, Wenxing Wang

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 4, doi: 10.1007/s11783-017-0925-7

Abstract: loss of PAN signal with the concentrations of NO and PAN, which can be used for data correction in PAN measurements

Keywords： TD-CIMS     Peroxyacetyl nitrate     Interference     Photochemical pollution     Formation efficiency    

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Quantification of emission variability for off-road equipment in China based on real-world measurements

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1455-x

Abstract:

• Emissions from 53 in-use diesel-fueled off-road equipment were measured.

Keywords： Off-road equipment     Portable emission measurement system (PEMS)     Real-world emissions     Diesel engine    

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Non-convex sparse optimization-based impact force identification with limited vibration measurements

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0762-2

Abstract: Impact force identification is important for structure health monitoring especially in applications involving composite structures. Different from the traditional direct measurement method, the impact force identification technique is more cost effective and feasible because it only requires a few sensors to capture the system response and infer the information about the applied forces. This technique enables the acquisition of impact locations and time histories of forces, aiding in the rapid assessment of potentially damaged areas and the extent of the damage. As a typical inverse problem, impact force reconstruction and localization is a challenging task, which has led to the development of numerous methods aimed at obtaining stable solutions. The classical ℓ2 regularization method often struggles to generate sparse solutions. When solving the under-determined problem, ℓ2 regularization often identifies false forces in non-loaded regions, interfering with the accurate identification of the true impact locations. The popular ℓ1 sparse regularization, while promoting sparsity, underestimates the amplitude of impact forces, resulting in biased estimations. To alleviate such limitations, a novel non-convex sparse regularization method that uses the non-convex ℓ1−2 penalty, which is the difference of the ℓ1 and ℓ2 norms, as a regularizer, is proposed in this paper. The principle of alternating direction method of multipliers (ADMM) is introduced to tackle the non-convex model by facilitating the decomposition of the complex original problem into easily solvable subproblems. The proposed method named ℓ1−2-ADMM is applied to solve the impact force identification problem with unknown force locations, which can realize simultaneous impact localization and time history reconstruction with an under-determined, sparse sensor configuration. Simulations and experiments are performed on a composite plate to verify the identification accuracy and robustness with respect to the noise of the ℓ1−2-ADMM method. Results indicate that compared with other existing regularization methods, the ℓ1−2-ADMM method can simultaneously reconstruct and localize impact forces more accurately, facilitating sparser solutions, and yielding more accurate results.

Keywords： impact force identification     inverse problem     sparse regularization     under-determined condition     alternating direction method of multipliers    

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Forecast and Measurements for Reduction of Dust in Demolition Blasting

Zheng Bingxu,Wei Xiaolin

Strategic Study of CAE 2002, Volume 4, Issue 8,   Pages 69-73

Abstract:

A series of technical measurements for dust-laying in demolition blasting of building of a sport centerThe comprehensive measurements involve clearage of surface dust, storing up water on floors, moistening

Keywords： demolition blasting     dust forecasting     reducing dust     high pressure sprinking water film     environment protection    

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Development of an experimental platform for research in energy and electrical machine control

Ali HMIDET, Rachid DHIFAOUI, Driss SAIDANI, Othman HASNAOUI,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 366-375 doi: 10.1007/s11708-010-0106-x

Abstract: This paper presents the development of a test bench dedicated for electrical machines and energy control, as realized by the research team of the Power Systems and Electrical Machines Laboratory (RME) of the National Institute of Applied Sciences and Technology (INSAT) in Tunisia. The principal components of the proposed test bench are explained, and the respective characteristics are given. This paper focuses on mounting low-cost sensors and developing reliable scientific results. The relevant obtained results in photovoltaic (PV) and wind energy fields, power measurement and control, as well as alternating current (AC) machine drives are likewise presented. These are supported by two signal processing controller boards based on Technosoft MCK240 and dSPACE DS1104 kits. In the wind energy field, some results relative to Self Excited Induction Generator dedicated to supplying isolated sites are discussed; in addition, water pumping is discussed for PV energy. In the AC drives area, the results of a closed loop control are presented using a developed direct voltage control (DVC) scheme implemented on dSPACE DS1104. Maps and interesting details of some realized sensors are also presented.

Keywords： test bench     induction motor     solar energy     wind energy     AC/DC/AC converter     sensors and power measurements    

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TRMM satellite onboard instruments and the application on precipitation analysis of their measurements

Fu Yunfei,Liu Qi,Wang Yu,Sun Liang,Li Rui,Ma Ming,Liu Guosheng

Strategic Study of CAE 2012, Volume 14, Issue 10,   Pages 43-50

Abstract: instruments onboard the tropical rainfall measurement mission (TRMM) satellite and the application of their measurements

Keywords： TRMM     precipitation radar     microwave imager     spectrum     precipitation    

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Lunar surface physical temperature retrieved from the measurements by CE-1 lunar microwave sounder

Li Yun,Jiang Jingshan,Wang Zhenzhan,Zhang Dehai and Zhang Xiaohui

Strategic Study of CAE 2013, Volume 15, Issue 7,   Pages 106-112

Abstract:

In this paper, algorithms of retrieving physical temperature and effective temperature from CE-1 lunar microwave sounder (CELMS) brightness temperatures are developed. The influences of physical temperature on microwave radiation are analyzed. These retrievals provide important information for evaluating other lunar surface parameters.

Keywords： CELMS     lunar surface physical temperature     retrieve    

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Title Author Date Type Operation

Spectral emittance measurements of micro/nanostructures in energy conversion: a review

Shiquan SHAN, Chuyang CHEN, Peter G. LOUTZENHISER, Devesh RANJAN, Zhijun ZHOU, Zhuomin M. ZHANG

Journal Article

Answer for questions of repeated measurements of variance analysis and distribution test of data — Authors

Journal Article

Application and evaluation of optical distance measurements in geometrical quality testing of microgears

Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,

Journal Article

NITROGEN CYCLING AND ENVIRONMENTAL IMPACTS IN THE SUBTROPICAL HILLY REGION OF CHINA: EVIDENCE FROM MEASUREMENTS

Journal Article

Operando modeling and measurements: Powerful tools for revealing the mechanism of alkali carbonate-based

Journal Article

δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source

Journal Article

Field measurements on microclimate in residential community in Guangzhou, China

Zhuolun CHEN, Lihua ZHAO, Qinglin MENG, Changshan WANG, Yongchao ZHAI, Fei WANG,

Journal Article

Diffusive gradients in thin films using molecularly imprinted polymer binding gels for in situ measurements

Ying Cui, Feng Tan, Yan Wang, Suyu Ren, Jingwen Chen

Journal Article

Peroxyacetyl nitrate measurements by thermal dissociation–chemical ionization mass spectrometry in an

Xinfeng Wang, Tao Wang, Likun Xue, Wei Nie, Zheng Xu, Steven C. N. Poon, Wenxing Wang

Journal Article

Quantification of emission variability for off-road equipment in China based on real-world measurements

Journal Article

Non-convex sparse optimization-based impact force identification with limited vibration measurements

Journal Article

Forecast and Measurements for Reduction of Dust in Demolition Blasting

Zheng Bingxu,Wei Xiaolin

Journal Article

Development of an experimental platform for research in energy and electrical machine control

Ali HMIDET, Rachid DHIFAOUI, Driss SAIDANI, Othman HASNAOUI,

Journal Article

TRMM satellite onboard instruments and the application on precipitation analysis of their measurements

Fu Yunfei,Liu Qi,Wang Yu,Sun Liang,Li Rui,Ma Ming,Liu Guosheng

Journal Article

Lunar surface physical temperature retrieved from the measurements by CE-1 lunar microwave sounder

Li Yun,Jiang Jingshan,Wang Zhenzhan,Zhang Dehai and Zhang Xiaohui

Journal Article