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The measuring techniques of greenhouse gas emission from reservoir aquatic ecosystem

Dai Huichao,Li Hua,Zheng Tiegang

Strategic Study of CAE 2010, Volume 12, Issue 9,   Pages 21-28

Abstract: of global greenhouse gases at home and abroad, by means of summarizing and analyzing the methods for measuring

Keywords： reservoir aquatic ecosystem     greenhouse gas     flux     measuring techniques    

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Comparison of analytical procedures for measuring phosphorus content of animal manures in China

Guohua LI, Qian LIU, Haigang LI, Fusuo ZHANG

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 4,   Pages 431-440 doi: 10.15302/J-FASE-2019279

Abstract:

The concentration and components of manure phosphorus (P) are key factors determining potential P bioavailability and runoff. The distribution of P forms in swine, poultry and cattle manures collected from intensive and extensive production systems in several areas of China was investigated with sequential fractionation and a simplified two-step (NaHCO -NaOH/EDTA) procedures. The mean total P concentration, determined by the sequential fractionation procedure of intensive swine, poultry and cattle manure, expressed as g·kg , was 14.9, 13.4 and 5.8 g·kg , respectively, and 4.4 g·kg in extensive cattle manure. In intensive swine, poultry and cattle manure about 73%, 74% and 79% of total P, respectively, was bioavailable (i.e., P extracted by H O and NaHCO ) and 78% in extensive cattle manure. The results indicated the relative environmental risk, from high to low, of swine, poultry and cattle manure. There is considerable regional variation in animal manure P across China, which needs to be considered when developing manure management strategies.

Keywords： diet phosphorus     manure phosphorus     sequential P fractionation    

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A feasibility study of the measuring accuracy and capability of wireless sensor networks in tunnel monitoring

Xiaojun LI, Zhong JI, Hehua ZHU, Chen GU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 111-120 doi: 10.1007/s11709-012-0150-1

Abstract: Fire disasters and the deterioration of tunnel structures are major concerns for tunnel operation and maintenance. Traditional wired monitoring systems have many drawbacks in terms of installation time, overall cost, and flexibility in tunnel environments. In recent years, there has been growing interest in the use of wireless sensor networks (WSNs) for the monitoring of various structural monitoring applications. This paper evaluated the feasibility of applying a WSN in the monitoring of tunnels. The monitoring requirements of tunnels under explosion and combustion fire scenarios are analyzed using numerical simulation, and the maximum possible distance for temperature sensors is derived. The displacement monitoring of tunnels using an inclinometer is investigated. It is recommended that the inclinometer should be installed in the 1/4 span of the tunnel structure. The maximum wireless transmission distances in both outdoor and tunnel environments were examined. The influences of surface materials and sensor node locations on the data transmission distance in tunnel environments were also investigated. The experimental results show that the data loss in tunnel environments is approximately three times that in outdoor environments. Surface material has a considerable influence on the transmission distance of radio signals. The distance is 25 ? 28 m for a raw concrete surface, 20 m for a brick surface, and 36 m for a terrazzo surface. The transmission distances along the middle of quarter points are approximately 0.9 ( is the transmission distance in the center of the tunnel), and the relative error is less than±3%. The transmission distances at different locations along the bottom exhibit significant differences, decreasing from the middle to the corner point, with distances of approximately 0.8 at the quarter points and minimum distances of approximately 0.55 at the corner points.

Keywords： wireless sensor network (WSN)     tunnel     monitoring     feasibility study    

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Soft curvature sensors for measuring the rotational angles of mechanical fingers

Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 610-621 doi: 10.1007/s11465-020-0596-0

Abstract: The design, fabrication, and testing of soft sensors that measure elastomer curvature and mechanical finger bending are described in this study. The base of the soft sensors is polydimethylsiloxane (PDMS), which is a translucent elastomer. The main body of the soft sensors consists of three layers of silicone rubber plate, and the sensing element is a microchannel filled with gallium-indium-tin (Ga-In-Sn) alloy, which is embedded in the elastomer. First, the working principle of soft sensors is investigated, and their structure is designed. Second, the relationship between curvature and resistance is determined. Third, several sensors with different specifications are built in accordance with the structural design. Experiments show that the sensors exhibit high accuracy when the curvature changes within a certain range. Lastly, the soft sensors are applied to the measurement of mechanical finger bending. Experiments show that soft curvature sensors can effectively reflect mechanical finger bending and can be used to measure the bending of mechanical fingers with high sensitivity within a certain working range.

Keywords： soft sensor     Ga-In-Sn alloy     strain sensing     curvature sensing     mechanical finger bending    

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WEIS wheel speed real-time measuring method for VOSM

Mengyao PAN, Guixiong LIU, Xiaobin HONG, Tusheng LIN,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 322-327 doi: 10.1007/s11465-010-0022-0

Abstract: To solve the problems in traditional wheel speed measuring methods, such as low measurement precisionof the vehicle’s operating attitude, a wheel embedded intelligent sensors (WEIS) wheel speed measuringshows that under experimental conditions the speed measurement error is −2.05%, and the speed measuring

Keywords： wheel embedded     intelligent sensing     wheel speed     monitoring    

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Surface modification techniques of membranes to improve their antifouling characteristics: recent advancements

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1837-1865 doi: 10.1007/s11705-023-2347-3

Abstract: Surface modification techniques of membranes to improve their antifouling characteristics: recent advancements

Keywords： Surface modification techniques    

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A spectrometer for measuring particle size distributions in the range of 3 nm to 10 μm

Jieqiong LIU,Jingkun JIANG,Qiang ZHANG,Jianguo DENG,Jiming HAO

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 63-72 doi: 10.1007/s11783-014-0754-x

Abstract: A full spectrum in the size range of 3 nm to 10 μm was demonstrated by measuring aerosol generated using

Keywords： spectrometer     particle size distribution     electrical mobility     linear inversion     aerodynamic diameter    

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Control measuring technique of long distance only head driving in shield tunnel

Xu Weiqing,Han Fuzhong

Strategic Study of CAE 2010, Volume 12, Issue 12,   Pages 56-58

Abstract: Based on the analysis of the measuring accuracy, only through the wire line can not satisfy the design

Keywords： shield     long distance     only head driving     control measuring    

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Application Research on Quick Measuring Moisture ofGarnierite by Means of Microwave Sensor

Fan Xingxiang,Yang Jingjing,Huang Ming,Wang Yunhua,Li Baiyu

Strategic Study of CAE 2007, Volume 9, Issue 11,   Pages 200-203

Abstract:

A novel method for quick measuring moisture of garnierite by means ofmicrowave sensor was investigated, and the effects of the different moisture content on the measuringFinally, experimental equipment, properties and application notes are presented, and the moisture measuring

Keywords： microwave     measuring     garnierite     moisture    

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Editorial for the Special Issue on High-End Measuring Instruments

Jiubin Tan, Kenneth Thomas VictorGrattan

Engineering 2022, Volume 16, Issue 9,   Pages 1-2 doi: 10.1016/j.eng.2022.07.002

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Error analysis and compensation of compound measuring system for blade surface

Li Bing,Chen Lei,Ding Jianjun,Jiang Zhuangde

Strategic Study of CAE 2013, Volume 15, Issue 1,   Pages 39-44

Abstract: Aiming at this problem, a compound measuring principle is proposed in this paper.And a four-coordinate measuring system is designed and established.Then, on the basis of the mechanical structure of the measuring system, the geometric errorthe proposed error analysis and compensation methods can improve the accuracy of the four-coordinate measuring

Keywords： blade airfoil surface     compound measuring principle     error analysis     error compensation     laser interferometry    

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An autonomous miniature wheeled robot based on visual feedback control

CHEN Haichu

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 197-200 doi: 10.1007/s11465-007-0033-7

Abstract: A Charge Coupled Device (CCD) camera is used for measuring and for visual navi gation.

Keywords： measuring     distance     autonomous locomotion     advantage     navigation    

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Application of endoscopic techniques in orbital blowout fractures

Shu Zhang, Yinwei Li, Xianqun Fan

Frontiers of Medicine 2013, Volume 7, Issue 3,   Pages 328-332 doi: 10.1007/s11684-013-0271-5

Abstract:

Minimally invasive surgical techniques, particularly endoscopic techniques, have revolutionized otolaryngealEndoscopic techniques have been gradually applied in orbital surgery through the sinus inferomedial toEndoscopic techniques help surgeons observe fractures and soft tissue of the posterior orbit to preciselyWe reviewed the development of endoscopic techniques, the composition of endoscopic systems for orbitalsurgery, and the problems and developmental prospects of endoscopic techniques for simple orbital wall

Keywords： orbital fractures     endoscope     restoration     surgery    

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Progress in studies of sex determination mechanisms and sex control techniques in

Qian ZHOU,Songlin CHEN

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 2,   Pages 113-123 doi: 10.15302/J-FASE-2016093

Abstract: much faster than males and it is feasible to improve the aquaculture production through sex control techniques

Keywords： Cynoglossus semilaevis     sex determination     sex control technique    

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Artificial lift equipment repairing techniques in Daqing Oilfield

He LIU, Guochen SHI, Cui WANG, Peijing SHI, Yi XU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 111-117 doi: 10.1007/s11465-009-0081-2

Abstract: After years of study, a series of repairing techniques for artificial lift equipment have been createdterritory remanufacturing technology, this paper analyzes the situation of artificial lift repairing techniques

Keywords： artificial lift equipment     repairing technique     remanufacturing technique     Daqing Oilfield    

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Title Author Date Type Operation

The measuring techniques of greenhouse gas emission from reservoir aquatic ecosystem

Dai Huichao,Li Hua,Zheng Tiegang

Journal Article

Comparison of analytical procedures for measuring phosphorus content of animal manures in China

Guohua LI, Qian LIU, Haigang LI, Fusuo ZHANG

Journal Article

A feasibility study of the measuring accuracy and capability of wireless sensor networks in tunnel monitoring

Xiaojun LI, Zhong JI, Hehua ZHU, Chen GU

Journal Article

Soft curvature sensors for measuring the rotational angles of mechanical fingers

Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN

Journal Article

WEIS wheel speed real-time measuring method for VOSM

Mengyao PAN, Guixiong LIU, Xiaobin HONG, Tusheng LIN,

Journal Article

Surface modification techniques of membranes to improve their antifouling characteristics: recent advancements

Journal Article

A spectrometer for measuring particle size distributions in the range of 3 nm to 10 μm

Jieqiong LIU,Jingkun JIANG,Qiang ZHANG,Jianguo DENG,Jiming HAO

Journal Article

Control measuring technique of long distance only head driving in shield tunnel

Xu Weiqing,Han Fuzhong

Journal Article

Application Research on Quick Measuring Moisture ofGarnierite by Means of Microwave Sensor

Fan Xingxiang,Yang Jingjing,Huang Ming,Wang Yunhua,Li Baiyu

Journal Article

Editorial for the Special Issue on High-End Measuring Instruments

Jiubin Tan, Kenneth Thomas VictorGrattan

Journal Article

Error analysis and compensation of compound measuring system for blade surface

Li Bing,Chen Lei,Ding Jianjun,Jiang Zhuangde

Journal Article

An autonomous miniature wheeled robot based on visual feedback control

CHEN Haichu

Journal Article

Application of endoscopic techniques in orbital blowout fractures

Shu Zhang, Yinwei Li, Xianqun Fan

Journal Article

Progress in studies of sex determination mechanisms and sex control techniques in

Qian ZHOU,Songlin CHEN

Journal Article

Artificial lift equipment repairing techniques in Daqing Oilfield

He LIU, Guochen SHI, Cui WANG, Peijing SHI, Yi XU,

Journal Article