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Reform of Teaching Practice of Modern Instrumental Analysis in Biotechnology Programs
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作者 Kun TANG Tong LIN +3 位作者 Zhenxia SHI Jie QIAO Chunyan XIE Lixin DU 《Agricultural Biotechnology》 2024年第3期93-95,共3页
Through the online and offline practical reform of the Modern Instrumental Analysis course of biotechnology majors from teaching content,teaching method,teaching demonstration to teaching effect,the traditional single... Through the online and offline practical reform of the Modern Instrumental Analysis course of biotechnology majors from teaching content,teaching method,teaching demonstration to teaching effect,the traditional single offline lecture is transformed into diversified and interactive modern teaching.The practical reform enriches and optimizes the course content,perfects and improves the course assessment system,and improves the teaching quality.It achieves the student-centered and application-oriented teaching goal,and also provides reference for further cultivating high-quality applied talents. 展开更多
关键词 Modern instrumental analysis BIOTECHNOLOGY Online and offline Reform of teaching
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Explorations in Experimental Teaching of Traditional Chinese Medicine Instrumental Analysis Based on the Training of Innovative Talents
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作者 Chenyan LIANG Chengzhi DU +1 位作者 Xu FENG Yunli TANG 《Medicinal Plant》 CAS 2022年第4期102-104,共3页
Training students’innovative thinking is an essential task of talent training in colleges and universities,and how to train students’innovativeness in experimental teaching is the focus of modern education.Experimen... Training students’innovative thinking is an essential task of talent training in colleges and universities,and how to train students’innovativeness in experimental teaching is the focus of modern education.Experimental lesson of instrumental analysis is an important section for integrating students’theories and practices,in view of the characteristics of traditional Chinese medicine major and instrumental analysis lesson,this lesson orientates opening up students’innovative thinking,explores the way of improving students’innovative ability in an all-around way through reforming the experimental teaching of instrumental analysis according to the teaching objectives. 展开更多
关键词 instrumental analysis Experimental teaching INNOVATION Traditional Chinese medicine
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Elemental Analysis of Air Suspended Particles in Rasht City Using Instrumental Neutron Activation Analysis
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作者 M.V. Masoud F. Aliasghar +2 位作者 K. Hossein K. Yalda B. Mehdi 《Journal of Environmental Science and Engineering》 2010年第10期40-43,共4页
Instrumental neutron activation analysis (INAA) has turned out to be particularly useful in the analysis of suspended particles. This work describes the INAA characterization of air particulate matter collected in R... Instrumental neutron activation analysis (INAA) has turned out to be particularly useful in the analysis of suspended particles. This work describes the INAA characterization of air particulate matter collected in Rasht city, Iran. The particulate matter was collected in two sampling sites for elemental analysis in the period of winter-summer 2009. Samples have been transferred to the environmental laboratory of radiation applications research school. Neutron exposures were performed in Tehran Research Reactor, and measurements were carried out using HPGe detectors coupled to gamma ray spectrometer. In these filter samples, the elements, AI, As, Ba, Br, Ca, CI, Co, Cr, Cu, Fe, Hg, K, La, Mg, Mn, Na, Sb, Sc, Ti, V and Zn were determined using different irradiation and counting protocols. Results show that mean concentration of most air-pollutants in Rasht are lower than those measured in other cities in Iran (Tehran, Shiraz, Isfahan). Collected data were also compared with reported results for other cities in the world. 展开更多
关键词 instrumental neutron activation analysis air pollutants particulate matter Rasht city toxic elements
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Comparative Study of Visual and Instrumental Analyses of Shade Selection
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作者 Jee-Ha Choi Ju-Mi Park +4 位作者 Seung-Geun Ahn Kwang-Yeob Song Min-Ho Lee Jae-Youn Jung Xinyu Wang 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第1期62-67,共6页
The difference between visual and instrumental analyses of a shade selection on natural teeth was investigated. With visual analysis, five prosthodontist examined the middle third of the unrestored maxillary right cen... The difference between visual and instrumental analyses of a shade selection on natural teeth was investigated. With visual analysis, five prosthodontist examined the middle third of the unrestored maxillary right central incisor of a patient using VITAPEN classical and Vita Toothguide 3D-MASTER tooth shade guide. In instrumental analysis, one prosthodontist examined the same teeth using a spectrophotometer (ShadepilotTM, Degudent, Hanau-Wolfgang, Germany, software 2.40). Overall, instrumental analysis is more accurate and reproducible than a visual assessment. However, the difference is clinically acceptable. 展开更多
关键词 shade selection visual analysis instrumental analysis SPECTROPHOTOMETER
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RESEARCH OF WAVELET TRANSFORM INSTRUMENT SYSTEM FOR SIGNAL ANALYSIS 被引量:11
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作者 Qin Shuren Chen Zhikui +3 位作者 Tang Baoping Yang Changqi Xu Mingtao He Hui (Test Center, Chongqing University) 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2000年第2期114-121,共8页
After brief describing the Principle of wavelet transform (WT) of signals, a new signals analysis system based on wavelet transform is introduced. The design and development of the instryment of wavelet transform are ... After brief describing the Principle of wavelet transform (WT) of signals, a new signals analysis system based on wavelet transform is introduced. The design and development of the instryment of wavelet transform are described. A number of practical uses of this system demonstrate that wavelet transform system is specially functional in identifying and processing impulse, singular and non-smooth signals, so that it should be evaluated the most advanced signal analyzing system. 展开更多
关键词 Wavelet transform Signal analysis Instrument
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THEORY AND APPLICATION OF WAVELET ANALYSIS INSTRUMENT LIBRARY 被引量:12
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作者 BO Lin QIN Shuren LIU Xiaofeng 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第3期464-467,共4页
Some new theory and algorithms on wavelet analysis are proposed, including continuous wavelet transform (CWT), discrete wavelet transform (DWT), wavelet package transform (WPT), wavelet denosing and mother wavel... Some new theory and algorithms on wavelet analysis are proposed, including continuous wavelet transform (CWT), discrete wavelet transform (DWT), wavelet package transform (WPT), wavelet denosing and mother wavelet selection, etc. Using the component-based hierarchy mode, the platform for virtual instrument (VI) is constructed, and the functions such as data sampling, data analysis and data present, etc are provided. Subsequently, the wavelet analysis library is designed and developed. The library consists of expert system, experienced database, development platform and abundant wavelet analysis functional module, which together implement general and special wavelet analysis in the field of mechanical engineering, energy source, transportation and biomedicine, etc. Finally, the wavelet analysis virtual instrument library is applied to detect fault called engine knock. Experimental result indicates that the wavelet analysis virtual instrument library can efficiently solve the engineering problem such as detecting engine knock. 展开更多
关键词 Wavelet analysis Virtual instrument library Engine knock
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Photometric solution and period analysis of the contact binary system AH Cnc 被引量:1
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作者 Ying-Jiang Peng Zhi-Quan Luo +11 位作者 Xiao-Bin Zhang Li-Cai Deng Kun Wang Jian-Feng Tian Zheng-Zhou Yan Yang Pan Wei-Jing Fang Zhong-Wen Feng De-Lin Tang Qi-Li Liu Jin-Jiang Sun Qiang Zhou 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2016年第10期63-70,共8页
Photometric observations of AH Cnc, a W UMa-type system in the open cluster M67, were car- fled out by using the 50BIN telescope. About 100h of time-series/3- and V-band data were taken, based on which eight new times... Photometric observations of AH Cnc, a W UMa-type system in the open cluster M67, were car- fled out by using the 50BIN telescope. About 100h of time-series/3- and V-band data were taken, based on which eight new times of light minima were determined. By applying the Wilson-Devinney method, the light curves were modeled and a revised photometric solution of the binary system was derived. We con- firmed that AH Cnc is a deep contact (f = 51%), low mass-ratio (q - 0.156) system. Adopting the distance modulus derived from study of the host cluster, we have re-calculated the physical parameters of the binary system, namely the masses and radii. The masses and radii of the two components were estimated to be respectively 1.188(4-0.061) Me, 1.332(4-0.063) RQ for the primary component and 0.185(4-0.032) Me, 0.592(4-0.051) Re for the secondary. By adding the newly derived minimum timings to all the available data, the period variations of AH Cnc were studied. This shows that the orbital period of the binary is con- tinuously increasing at a rate of dp/dt = 4.29 x 10-10 d yr-1. In addition to the long-term period increase, a cyclic variation with a period of 35.26 yr was determined, which could be attributed to an unresolved tertiary component of the system. 展开更多
关键词 methods: data analysis -- astronomical instrumentation -- binaries: eclipsing stars closestars -- Galaxy: open clusters and associations: individual (M67)
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Review Recent progress in the determination of gallium, indium, and thallium 被引量:1
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作者 GAOJinzhang 《Rare Metals》 SCIE EI CAS CSCD 2005年第1期1-7,共7页
This mini-review covers the literatures of the determination of gallium, indium, and thallium by instrumental analysis with computer-assisted searching over the period of 1994 to 2003. Some papers appearing in the ear... This mini-review covers the literatures of the determination of gallium, indium, and thallium by instrumental analysis with computer-assisted searching over the period of 1994 to 2003. Some papers appearing in the early of 2004 are also included. Because the rapid progress in the instrument has been made, these new papers are prioritized in selection in the similar papers. The contents are considered to be separation and preconcentration, spectrophotometry, spectrofluorimetry, electroanalyses, atomic absorption spectrometry, inductively coupled plasma-atomic emission spectrometry, inductively coupled plasma-mass spectrometry and so forth. 展开更多
关键词 GALLIUM INDIUM THALLIUM DETERMINATION instrumental analysis
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Integration system research and development for three-dimensional laser scanning information visualization in goaf 被引量:1
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作者 罗周全 黄俊杰 +2 位作者 罗贞焱 汪伟 秦亚光 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第7期1985-1994,共10页
An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, clo... An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, cloud data de-noising optimization, construction, display and operation of three-dimensional model, model editing, profile generation, calculation of goaf volume and roof area, Boolean calculation among models and interaction with the third party soft ware. Concerning this system with a concise interface, plentiful data input/output interfaces, it is featured with high integration, simple and convenient operations of applications. According to practice, in addition to being well-adapted, this system is favorably reliable and stable. 展开更多
关键词 GOAF laser scanning visualization integration system 1 Introduction The goaf formed through underground mining of mineral resources is one of the main disaster sources threatening mine safety production [1 2]. Effective implementation of goaf detection and accurate acquisition of its spatial characteristics including the three-dimensional morphology the spatial position as well as the actual boundary and volume are important basis to analyze predict and control disasters caused by goaf. In recent years three-dimensional laser scanning technology has been effectively applied in goaf detection [3 4]. Large quantities of point cloud data that are acquired for goaf by means of the three-dimensional laser scanning system are processed relying on relevant engineering software to generate a three-dimensional model for goaf. Then a general modeling analysis and processing instrument are introduced to perform subsequent three-dimensional analysis and calculation [5 6]. Moreover related development is also carried out in fields such as three-dimensional detection and visualization of hazardous goaf detection and analysis of unstable failures in goaf extraction boundary acquisition in stope visualized computation of damage index aided design for pillar recovery and three-dimensional detection
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Sky subtraction for LAMOST 被引量:3
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作者 Zhong-Rui Bai Hao-Tong Zhang +7 位作者 Hai-Long Yuan Guang-Wei Li Jian-Jun Chen Ya-Juan Lei Hui-Qin Yang Yi-Qiao Dong Gang Wang Yong-Heng Zhao 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2017年第9期25-38,共14页
Sky subtraction is a key technique in data reduction of multi-fiber spectra. Knowledge of characteristics related to the instrument is necessary to determine the method adopted in sky subtraction. In this study, we de... Sky subtraction is a key technique in data reduction of multi-fiber spectra. Knowledge of characteristics related to the instrument is necessary to determine the method adopted in sky subtraction. In this study, we describe the sky subtraction method designed for the Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST) survey. The method has been integrated into the LAMOST 2D Pipeline v2.6 and applied to data from LAMOST DR3 and later. For LAMOST, calibration using sky emission lines is used to alleviate the position-dependent (and thus time-dependent) ,-~ 4% fiber throughput uncertainty and small wavelength instability (0.1/~) during observation. Sky subtraction using principal component analysis (PCA) further reduces 25% of the sky line residual from OH fines in the red part of LAMOST spectra after the master sky spectrum, which is derived from a B-spline fit of 20 sky fibers in each spectrograph. Using this approach, values are adjusted by a sky emission line and subtracted from each fiber. Further analysis shows that our wavelength calibration accuracy is about 4.5 km s-1, and the averages of residuals after sky subtraction are about 3% for sky emission lines and 3% for the continuum region. The relative sky subtraction residuals vary with moonlight background brightness, and can reach as low as 1.5% for regions that have sky emission lines during a dark night. Tests on F stars with both similar sky emission line strength and similar object continuum intensity show that the sky emission line residual of LAMOST is smaller than that of the SDSS survey. 展开更多
关键词 techniques: spectroscopic -- methods data analysis -- instrumentation spectrographs
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Study of the continuum removal method for the Moon Mineralogy Mapper(M^3) and its application to Mare Humorum and Mare Nubium 被引量:2
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作者 Xun-Yu Zhang Zi-Yuan Ouyang +5 位作者 Xiao-Meng Zhang Yuan Chen Xiao Tang Ao-Ao Xu Ze-Sheng Tang Yun-Zhao Wu 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2016年第7期133-142,共10页
The absorption band center of visible and near infrared reflectance spectra is a key spectral parameter for lunar mineralogical studies, especially for the mafic minerals(olivine and pyroxene) of mare basalts, which... The absorption band center of visible and near infrared reflectance spectra is a key spectral parameter for lunar mineralogical studies, especially for the mafic minerals(olivine and pyroxene) of mare basalts, which have two obvious absorption bands at 1000 nm(Band I) and 2000 nm(Band II). Removal of the continuum from spectra, which was developed by Clark and Roush and used to isolate the particular absorption feature, is necessary to estimate this parameter. The Moon Mineralogy Mapper(M3) data are widely used for lunar mineral identification. However, M3 data show a residual thermal effect, which interferes with the continuum removal, and systematic differences exist among optical data taken during different optical periods. This study investigated a suitable continuum removal method and compared the difference between two sets of M3 data taken during different optical periods, Optical Period 1B(OP1B)and Optical Period 2A(OP2A). Two programs for continuum removal are reported in this paper. Generally,a program respectively constructs two straight lines across Band I and Band II to remove the continuum,which is recommended for locating band centers, because it can find the same Band I center with different right endpoints. The optimal right endpoint for continuum removal is mainly dominated by two optical period data at approximately 2480 and 2560 nm for OP1 B and OP2 A data, respectively. The band center values derived from OP1 B data are smaller than those derived from OP2 A data in Band I but larger in Band II, especially for the spectra using longer right endpoints(〉2600 nm). This may be due to the spectral slopes of OP1 B data being steeper than those of OP2 A data in Band I but gentler in Band II. These results were applied to Mare Humorum and Mare Nubium, and the measurements were found to mainly vary from intermediate- to high-Ca pyroxene. 展开更多
关键词 TECHNIQUES spectroscopic methods data analysis instrumentation spectrographs
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A solar radio dynamic spectrograph with flexible temporal-spectral resolution 被引量:2
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作者 Qing-Fu Du Lei Chen +7 位作者 Yue-Chang Zhao Xin Li Yan Zhou Jun-Rui Zhang Fa-Bao Yan Shi-Wei Feng Chuan-Yang Li Yao Chen 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2017年第9期111-118,共8页
Observation and research on solar radio emission have unique scientific values in solar and space physics and related space weather forecasting applications, since the observed spectral structures may carry important ... Observation and research on solar radio emission have unique scientific values in solar and space physics and related space weather forecasting applications, since the observed spectral structures may carry important information about energetic electrons and underlying physical mechanisms. In this study, we present the design of a novel dynamic spectrograph that has been installed at the Chashan Solar Radio Observatory operated by the Laboratory for Radio Technologies, Institute of Space Sciences at Shandong University. The spectrograph is characterized by real-time storage of digitized radio intensity data in the time domain and its capability to perform off-line spectral analysis of the radio spectra. The analog signals received via antennas and amplified with a low-noise amplifier are converted into digital data at a speed reaching up to 32 k data points per millisecond. The digital data are then saved into a high- speed electronic disk for further off-line spectral analysis. Using different word lengths (1-32k) and time cadences (5 ms-10 s) for off-line fast Fourier transform analysis, we can obtain the dynamic spectrum of a radio burst with different (user-defined) temporal (5 ms-10 s) and spectral (3 kHz-320kHz) resolutions. This enables great flexibility and convenience in data analysis of solar radio bursts, especially when some specific fine spectral structures are under study. 展开更多
关键词 Sun: radio radiation-- radiation: dynamics-- instrumentation: spectrographs-- methods data analysis -- techniques: image processing
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A New Type of Exposed Oil Sand Mine
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作者 Gao Zhi-nong College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072,China 《Wuhan University Journal of Natural Sciences》 CAS 2002年第2期237-242,共6页
With several means of analysis, the unique organic compound component and distribution of exposed oil sand existing in Qinghai, north-west China, is revealed. Qinghhai oil sand has great content of light components wi... With several means of analysis, the unique organic compound component and distribution of exposed oil sand existing in Qinghai, north-west China, is revealed. Qinghhai oil sand has great content of light components with high saturated hydrocarbon content up to approximately 50%, while its heavy components of colloid and asphaltene is rather low (<38%); straight-chain alkane has a regular distribution concentrating mainly around C28; it has a very high atom ratio of H/C. The physical parameters of the oil sand mine are within the range of common heavy oils. Such chemical composition and distribution obviously differs from that of other known exposed oil sand mines. This particular property of the oil sand is formed due to the unique geographical and geological environment. Therefore, it is intended to exploit the mine with a new combined method, i.e., first drill horizontal wells and then opencut. 展开更多
关键词 exposed oil sand chemical composition instrument analysis method of exploitation
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The Astrometric Performance Test of 80 cm Telescope at Yaoan Station and Precise CCD Positions of Apophis
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作者 Bifeng Guo Qingyu Peng +4 位作者 Ying Chen Zhongjie Zheng Yijia Shang Dan Li Xiao Chen 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2022年第5期56-67,共12页
The 80 cm azimuthal telescope has newly been mounted at Yaoan Station,Purple Mountain Observatory since2018.The astrometric performance of the telescope is tested in the following three aspects.(a)The geometric distor... The 80 cm azimuthal telescope has newly been mounted at Yaoan Station,Purple Mountain Observatory since2018.The astrometric performance of the telescope is tested in the following three aspects.(a)The geometric distortion of its CCD attached.It is stable in both a single epoch and multi epochs.Eight distortion solutions are derived over about one year.The maximum values range from 0.75 to 0.79 pixel and the median values range from 0.14 to 0.16 pixel.(b)The limit magnitude of stars.About 20.5 mag(Gaia-G)stars can be detected with Johnson-V filter exposured in 300 s.The astrometric error of about 20.5 mag stars is estimated at O".14 using the fitted sigmoidal function.(c)The astrometric accuracy and the precision of stacked fast-moving faint object.24 stacked frames of the potentially hazardous asteroid(99942)Apophis were derived on 2021 April 14 and 15(fainter than18 mag)based on the ephemeris shifts.During data reduction,the newest Gaia EDR3 Catalog and Jet Propulsion Laboratory Horizons ephemeris are referenced as theoretical positions of stars and Apophis,respectively.Our results show that the mean(O-C)s(observed minus computed)of Apophis are-O".018 and O".020 in R.A.and decl.,and the dispersions are estimated at O".094 and O".085,respectively,which show the consistency of the stacked results by Astrometrica. 展开更多
关键词 astronomical instrumentation astrometry-asteroid belt-astronomy data analysis astronomy data reduction
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An investigation of collisions between fiber positioning units in LAMOST
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作者 Xiao-Jie Liu Gang Wang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2016年第4期107-112,共6页
The arrangement of fiber positioning units in the LAMOST focal plane may lead to collisions during the fiber allocation process, To avoid these collisions, a software-based protection system has to abandon some target... The arrangement of fiber positioning units in the LAMOST focal plane may lead to collisions during the fiber allocation process, To avoid these collisions, a software-based protection system has to abandon some targets located in the overlapping field of adjacent fiber units. In this paper, we first analyze the probability of collisions between fibers and infer their possible reasons. It is useful to solve the problem of collisions among fiber positioning units so as to improve the efficiency of LAMOST. Based on this, a collision handling system is designed by using a master-slave control structure between the micro control unit and microcomputer. Simulated experiments validate that the system can provide real-time inspection and swap information between the fiber unit controllers and the main controller. 展开更多
关键词 methods: statistical -- telescopes -- instrumentation: detectors -- methods: data analysis --methods: observational
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STATUS AND ANALYSIS OF AUTO INSTRUMENT INDUSTRY IN CHINA
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《中国汽车(英文版)》 1995年第5期18-22,共5页
Ⅰ. Status of Auto Instrument Industry in China Begun in the year of 1951, China’s auto instrument manufacturing industry has a long history of more than 40 years. Now, it hms an annual production capacity of 2 milli... Ⅰ. Status of Auto Instrument Industry in China Begun in the year of 1951, China’s auto instrument manufacturing industry has a long history of more than 40 years. Now, it hms an annual production capacity of 2 million sets, and an employee of more than 10 thousand 展开更多
关键词 VDO STATUS AND analysis OF AUTO INSTRUMENT INDUSTRY IN CHINA
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