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2017 Vol. 38, No. 6 Published: 2017-11-22

	661	The Error Analysis of the Non-orthogonal Total Station Coordinate Measurement System
		WU Bin,DING Wen,YANG Feng-ting,XUE Ting
		DOI: 10.3969/j.issn.1000-1158.2017.06.01
		According to the Non-orthogonal total station system principle, the main sources of the system measurement error are the rotation angle errors of rotary tables and the distance measurement error of the laser range finder. Using GUM algorithm, the uncertainties of these two sources are estimated and the system measurement uncertainty is evaluated. The result is validated by the simulation on MATLAB and the experiment conducted in the laboratory. The results show that when the distance is constant, the measurement uncertainty is almost independent of the horizontal angle, and increases with the absolute value of the vertical angle. When the angle value is constant, the measurement uncertainty increases with the distance from the measured point and the calibration point on the collimated axis.The accuracy of the simulation results is preliminarily verified by experiments.
		2017 Vol. 38 (6): 661-666 [Abstract] ( 880 ) HTML (1 KB) PDF (1731 KB) ( 1072 )

	667	The Research of Real-time Focusing and Inclination Angle Measurement on Metrological Ultraviolet Microscope
		GAO Jin-yang,GAO Si-tian,DONG Ming-li,LIAN Xiao-yi,PI Lei,SHU Hui
		DOI: 10.3969/j.issn.1000-1158.2017.06.02
		The metrological ultraviolet microscope utilizes 248nm ultraviolet light illumination and high numerical aperture objective systems, the working distance and depth of field are very small. In order to achieve a clear image, it is required the automatic focus. An auto-focus and inclination measurement algorithm is researched. Using the automatic focusing method based on image processing, the Tenengrad function is selected as the image clarity criteriont. To solve the problem that the standard model tilt and the lens may collide during the scanning measurement, a method of measuring the inclination of the template is proposed to judge the inclination angle and direction of the template, and the real-time focusing is realized.
		2017 Vol. 38 (6): 667-670 [Abstract] ( 796 ) HTML (1 KB) PDF (1406 KB) ( 523 )

	671	A Design of Auxiliary Alignment Measuring System for Micro Component Tension
		YANG En-zhen,WANG Biao,NING Xiao-xu,WANG Yong-hong
		DOI: 10.3969/j.issn.1000-1158.2017.06.03
		An auxiliary alignment measuring system for micro component tensile test is designed. Based on laser collimation features with light refraction law and reflection law combined, the image information of laser spot including displacement and angle deviator can be obtained by orthogonal two dimensional camera. The mathematical model of the two-dimensional displacement and angle deviator and the laser image point changes is established as well as the experimental platform. On the basis of this model, the adjustable parameter variables of two-dimensional displacement and angle deviator can be acquired after processing the obtained images by MATLAB. The results of the test indicate that the two-dimensional angle deviator resolution can reach 0.001° and the repetitiveness is superior to 0.02°; the two-dimensional displacement resolution can reach submicron and the repetitiveness is superior to 10 μm. This measuring system is proved to be able to provide parameter adjustment for auxiliary guiding alignment and improve the accuracy of the tensile testing data in micro component tensile test.
		2017 Vol. 38 (6): 671-675 [Abstract] ( 810 ) HTML (1 KB) PDF (618 KB) ( 406 )

	676	Study on Influence of Position Deviation of Multi-reading Heads ofEqual Average on Angular Measurement
		QIAO Dan,XUE Zi,HUANG Yao,YE Shu-liang
		DOI: 10.3969/j.issn.1000-1158.2017.06.04
		A method of analyzing the influence of the position deviation of the reading head to suppress the angular deviation is proposed based on multi-reading heads of equal average system. Theoretical analysis and simulation method of the angular deviation introduced by the non- ideal position of reading head are introduced. The harmonic error is separated and the decay rate of error amplitude is obtained. The method is applied to error analysis of the encoder, and the result shows that±0.09″ angular deviation can be introduced by 0.5° position deviation of reading head.
		2017 Vol. 38 (6): 676-680 [Abstract] ( 775 ) HTML (1 KB) PDF (1802 KB) ( 394 )

	681	Calibration and value transfer of absolute spectral responsivity between 400nm and 1700nm
		SHI Xue-shun,XU Nan,LIU Chang-ming,GAN Hai-yong,LI Jian-jun3,LIN Yan-dong,CHEN Kun-feng
		DOI: 10.3969/j.issn.1000-1158.2017.06.05
		The principle and methods of optical radiation measurement was illustrated. The absolute spectral responsivity of Si trap detectors and InGaAs trap detectors were calibrated with the absolute cryogenic radiometer at eleven wavelengths between 400 nm and 1700 nm, which are 476.1, 488, 514.7, 521, 568, 632.8, 647.1, 785, 852, 980, 1064 and 1550 nm, respectively, with measurement uncertainties better than 0.05%. The absolute spectral responsivity curves of Si trap detectors were calculated by quantum efficiency model. The absolute responsivity of three wavelengths was applied to get absolute spectral responsivity from the relative spectral responsivity of InGaAs detector. Results show that the two types of trap detectors can be used to calibrate and transfer optical radiation value in the visible and near infrared spectral range.
		2017 Vol. 38 (6): 681-685 [Abstract] ( 1003 ) HTML (1 KB) PDF (436 KB) ( 861 )

	686	Reconstruction of Multilayer Samples by In-line Compressive Holography
		SUN Xi-kang,YU Ying-jie,WU Xiao-yan,ZHOU Wen-jing
		DOI: 10.3969/j.issn.1000-1158.2017.06.06
		In order to study the reconstruction effect of three-layer samples using compressive holography, tomography experiment is proposed and compressive holography and traditional back-propagation digital holography is analyzed. The frequency domain sample reduction to make hologram sparse is used, remaining 25% data of the original hologram. Through the simulation experiment, that the correlation coefficient of the reconstructed image by compressive holography and simulation sample can reach 0.64. 4f optical system is introduced, and it separates three-layer samples apart with compressive holography method which can make reconstructed images much clearer and suppress background noise.
		2017 Vol. 38 (6): 686-689 [Abstract] ( 598 ) HTML (1 KB) PDF (916 KB) ( 579 )

	690	A Miniaturized Test Device to Measure Key Resolution Parameters of an Ophthalmic Optical Coherence Tomography Equipment
		FU Xiao-yu,HU Zhi-xiong,GE Chun-feng,LIU Wen-li,HONG Bao-yu,JIA Dong-fang
		DOI: 10.3969/j.issn.1000-1158.2017.06.07
		Both the axial resolution and the lateral resolution were derived from a theoretical model of optical coherence tomography technology. A miniaturized test device for measuring the light source spectrum and the numerical aperture of an optical coherence tomography system is developed to verify a commercial clinical ophthalmic optical coherence tomography equipment. The acquired axial resolution is 6.9μm, while the lateral resolution has the value of 42.3μm. The preliminary results have demonstrated that the integrated testing system could be utilized as a metrological standard device for quality control of ophthalmic OCT equipment.
		2017 Vol. 38 (6): 690-692 [Abstract] ( 717 ) HTML (1 KB) PDF (543 KB) ( 610 )

	693	Research on the Immersion Profiles with Water Triple Point Cells and the Effect of Bushing on the Immersion Profiles
		WANG Peng,HU Zi-feng,ZHU Jia-qi,YAN Xiao-ke,JIANG Hong,PU Ling,CHEN Gong
		DOI: 10.3969/j.issn.1000-1158.2017.06.08
		Using labview programming and stepper motor controller, an automatic measuring system of immersion profiles was established. The system controlled the height of standard platinum resistance thermometer(SPRT) in thermometer well by the stepper motor controller, and measured the resistance value in different heights of SPRT by the AC bridge which accuracy is 0.02×10-6. By linear fitting, the hydrostatic pressure correction coefficient of water triple point cells was obtained. The effects of bushing on the immersion profiles were studied, and the experimental results show that the experimental value of the hydrostatic pressure correction coefficient of water triple point cells is very close to the theoretical value when the ininer diameters are 16 mm and 18 mm, the difference is less than 0.4 μK/cm. The effect of bushing on the hydrostatic pressure correction coefficient is less than 0.5 μK/cm.
		2017 Vol. 38 (6): 693-696 [Abstract] ( 853 ) HTML (1 KB) PDF (908 KB) ( 387 )

	697	The Verification on the Capability of High Pressure pVTt Standard Facility
		CAO Pei-juan,LI Chun-hui,CUI Li-shui,ZHANG Han
		DOI: 10.3969/j.issn.1000-1158.2017.06.09
		The high pressure pVTt gas flow standard facility in National Institute of Metrology(China), the expanded uncertainty of the facility could be 0.06% (k=2), while the expanded uncertainty of discharge coefficient of calibrated sonic nozzle is 0.08% (k=2). The measurement capability of the new pVTt facility was verified with the comparisons among the existed pVTt facility and the gas flow facilities in Physikalisch-Technische Bundesanstalt(Germany) with 3 sonic nozzles as transfer meters.The comparison results show in good agreement with each other of devices.
		2017 Vol. 38 (6): 697-701 [Abstract] ( 1005 ) HTML (1 KB) PDF (990 KB) ( 931 )

	702	Digital Two-wire HART Vortex Flowmeter Transmitter Based on Double Charge Amplifier
		SHU Zhang-ping,XU Ke-jun,SHAO Chun-li,FANG Min
		DOI: 10.3969/j.issn.1000-1158.2017.06.10
		A digital two wire HART vortex flowmeter transmitter based on double charge amplifiers is developed in order to solve the problems that there is low sensitivity in the high temperature resistant vortex flowmeter sensor, and HART communication increases power consumption and its stability is easily affected by the power. The signal conditioning circuit concluding two-stage charge amplifier and two-stage low-pass filter is designed to amplify and filter the low output amplitude of high temperature resistant vortex flow sensor, and obtain the stable flow signal. Two isolated power supply scheme is adopted to improve load ability of power supply and ensure the stability of the communication, which achieves two-wire HART communication during the digital signal processing. The experimental results show that the transmitter possesses high measurement accuracy, small measurable low limit, and also meets the requirements of power consumption.
		2017 Vol. 38 (6): 702-707 [Abstract] ( 618 ) HTML (1 KB) PDF (385 KB) ( 591 )

	708	Research on Automated Calibration Method for Piston Gauges
		YANG Yuan-chao
		DOI: 10.3969/j.issn.1000-1158.2017.06.11
		To investigate automated calibration of piston gauges, a high-precision pressure transducer as an immediate in-situ transfer standard was introduced. Experiments were carried out to study the resolution and short-term stability of the transducer, and the influence of the transducer linear coefficient on the calibration result was evaluated. Comparative study of the new method and the traditional method shows their uncertainties are similar as of about 5×10-6(k=1) and the calibration results are in good agreement within the uncertainty. An automated calibration instrument for piston gauges was developed based on the new method with automation of pressure control, valve operation and data acquisition. The automated instrument improves the efficiency of the piston gauge calibration.
		2017 Vol. 38 (6): 708-712 [Abstract] ( 545 ) HTML (1 KB) PDF (645 KB) ( 468 )

	713	Study on Different Curvature Radius Tips on the Nano Indentation Hardness at Super Low Depth
		LI Xiao-bing,TAO Xing-fu,YANG Hao,HE Zhi-yong
		DOI: 10.3969/j.issn.1000-1158.2017.06.12
		Nano indentation experiments that were carried out with three different curvature radius tips on fused silica. The curvature radius and the area function of the tips is measured directly by the AFM method. In shallow indentation conditions, the measurement errors of indentation hardness would be affected by the variation of curvature radius of tip. The smaller the curvature radius of the tip , the faster obtained of the true indentation hardness as the increase of contact depth. As the same small indentation depth, the tested hardness is closer to its true value under a smaller curvature radius tip than that of larger one.
		2017 Vol. 38 (6): 713-716 [Abstract] ( 428 ) HTML (1 KB) PDF (570 KB) ( 546 )

	717	Out-plane Error and Correction in Measurement Using Video Extensometer
		CHAI Xing-hua,ZHANG Jing,CHEN Xin,ZHOU Fu-qiang
		DOI: 10.3969/j.issn.1000-1158.2017.06.13
		These errors of video extensometer are analyzed from the aspects of mechanical assembly, external vibration, and image processing. In addition, the out-plane error is analyzed in details and the correction method is proposed. To evaluate the performance of the correction method, real experiments were performed. The results showed the errors can be reduced by the optimization algorithm, and the relative accuracy can be maintained at 0.5%, which achieved the extensometer classification of 0.5 level.
		2017 Vol. 38 (6): 717-720 [Abstract] ( 752 ) HTML (1 KB) PDF (1120 KB) ( 895 )

	721	Research on Parallel Measurement of Liquid Density and Viscosity Using Love Wave Based on Artificial Neural Networks
		CHEN Zhi-jun,HAN Chao,CHEN Tao,CHEN Zhao-xing,PENG Fu-qiang
		DOI: 10.3969/j.issn.1000-1158.2017.06.14
		When Love wave device is loaded with liquid, the liquid density and viscosity are coupling together, its hard to use the Love wave device for the parallel measurement of liquid density and viscosity directly. Based on the background mentioned above, the theoretical model of liquid sensing by the Love wave device composed of both piezoelectric substrate and piezoelectric film is established, the parallel measurement method of liquid density and viscosity based on the artificial neural networks is presented. Utilizing the numerical values calculated by the theoretical model as the training data, the liquid density and viscosity are forecasted parallel by the Love wave propagation velocity and attenuation. The comparison between the forecast results and the theoretical simulation shows the effectiveness of the method.
		2017 Vol. 38 (6): 721-724 [Abstract] ( 568 ) HTML (1 KB) PDF (900 KB) ( 389 )

	725	Finite Time Extended State Observer Designed for Nonlinear Systems
		WANG Hong-bin,ZHOU Zhen,WANG Yue-ling,HAO Ce,GE Shun-gang
		DOI: 10.3969/j.issn.1000-1158.2017.06.15
		To investigate a class of nonlinear systems with uncertainties and external disturbances, a finite time extended state observer is designed to estimate the uncertainties and external disturbances in finite time. Compared to standard extended state observer, based on the idea of terminal sliding mode, the observer makes use of fractional powers to reduce extended state error to zero in finite time, and then strengthen the robustness. A sufficient condition on the issue of finite time stability is established through the theory of Lyapunov, and finally, an illustrative numerical simulation is given to demonstrate the effectiveness of the strategy proposed.
		2017 Vol. 38 (6): 725-729 [Abstract] ( 708 ) HTML (1 KB) PDF (366 KB) ( 782 )

	730	Many-objective Load Distribution for Cold Rolling Based on Reference Point and Differential Mutation Strategy
		ZHAO Zhi-wei,HOU Yu-hao,WANG Wei-zhi,YAO Hong-bo
		DOI: 10.3969/j.issn.1000-1158.2017.06.16
		To improve the accuracy of many-objective evolutionary algorithm, the characteristics of the reference point and two differential mutation strategies are analyzed. The RN2-DE algorithm is proposed to improve the mutation strategy to replace the mutation strategy of R-NSGA-II. The experimental results of function DTLZ2 for 4 dimensions shows that the proposed algorithm significantly improves the convergence accuracy. Many-objective optimization problem of load distribution for cold rolling is established by four objectives, such as equal power margin, minimum rolling power, slipping preventing and good flatness of the final stand, and is optimized by the proposed algorithm.
		2017 Vol. 38 (6): 730-734 [Abstract] ( 561 ) HTML (1 KB) PDF (697 KB) ( 402 )

	735	Static Analysis of a New Laser Measuring Platform
		ZHANG Dian-fan,QU Xiao-man,CHENG Shu-hong
		DOI: 10.3969/j.issn.1000-1158.2017.06.17
		The static analysis is researched aiming at a new laser measuring platform. Firstly, the closed-loop vector constraint equations is established, which can carry out the velocity Jacobi matrix based on vector method. On the basis of this analysis, the force Jacobian matrix which reflects the mapping relation between the external forces and moments acting on the moving platform and the actuated joint is established by using principle of virtual work. Then, the static calibration experiment is carry out to verify the correctness of the force Jacobian matrix mentioned above. Finally, the evaluation indexs of static performance are defined with Lagrange’s conditional extremum. The experimental results have indicated that the proposed method can reveal the relationship between structural parameters and the evaluation indexs of static performance. Moreover, the parallel mechanism proposed theoretically have best statics comprehensive performance.
		2017 Vol. 38 (6): 735-739 [Abstract] ( 638 ) HTML (1 KB) PDF (495 KB) ( 394 )

	740	Development of Novel Calibration Device for Angular Acceleration Sensor
		ZHAO Hao
		DOI: 10.3969/j.issn.1000-1158.2017.06.18
		A novel calibration device for angular acceleration sensor is designed. The calibration device is composed of outer stator, cup rotor and inner stator, the axis of two stator winding is orthogonal, and the AC in two winding stagger 90 electrical degrees each other, then a rotating magnetic field is generated, and result in the mutative angular acceleration produced on rotor. The theoretical formula of angular acceleration is deduced, the method of obtaining the parameters of the formula is given, and the characteristics of the calibration device are determined by the grating angular acceleration measurement system, the results show that the linear error of the calibration device is about 0.53%.
		2017 Vol. 38 (6): 740-743 [Abstract] ( 800 ) HTML (1 KB) PDF (612 KB) ( 446 )

	744	Study of the Metal Micro Crack Location Based on Vibro-acoustic Modulation and Time Reversal Method
		HU Liu-chen,ZHENG Hui-feng,FANG Piao-piao,WANG Yue-bing,CAO Wen-xu
		DOI: 10.3969/j.issn.1000-1158.2017.06.19
		In order to overcome the shortage that traditional linear ultrasonic testing is insensitive to the closed cracks, the nonlinear ultrasonic testing research based on vibro-acoustic modulation(VAM) was studied and the time reversal(TR) method was used to focus nonlinear signal. Finite element software ABAQUS was used to simulate micro crack detection of aluminium tube based on VAM, the first order sideband of VAM signal was extracted by finite impulse response(FIR) filter and was reversed in the time domain. Then reloaded TR signal on the nondestructive tube model and carried out the time reversing focusing simulation with ABAQUS. The results show that the first order sideband is able to focus around original crack location, the diametrical arrangement of TR signals load position is superior to axial arrangement, and crack dimension and location can be measured base on the time reversal focusing imaging.
		2017 Vol. 38 (6): 744-748 [Abstract] ( 527 ) HTML (1 KB) PDF (1590 KB) ( 646 )

	749	Automatic EOG Artifact Elimination of EEG based on subspace decomposition
		FU Rong-rong,HOU Pei-guo,SHI Pei-ming,MENG Zong
		DOI: 10.3969/j.issn.1000-1158.2017.06.20
		To solve the electrooculogram (EOG) artifact elimination problem of electroencephalogram (EEG) signals,an automatic EOG artifact removal method is proposed based on geometric subspace decomposition. Geometric subspace is constructed by maximum noise fraction (MNF) approach, the decomposition in geometric subspace is used to separate multichannel EEG into a series of MNF components. The MNF components have the high correlation degree contain EOG artifact based on Spearman rank correlation coefficient. Thus EOG artifacts can be extracted in this detail way. Then the artifact free EEG signals are obtained by accumulating and reconstructing the processed components after projected back in signal space. Both generated data set and raw recordings were studied, combining the advantage of energy distribution visualization in brain mapping plots, the experiment results showed the effectiveness of the proposed method in artifact elimination.
		2017 Vol. 38 (6): 749-753 [Abstract] ( 626 ) HTML (1 KB) PDF (1745 KB) ( 438 )

	754	EEG signal denoising based on a wavelet nonlinear continuous function
		YU Xiang-yang,LUO Zhi-zeng
		DOI: 10.3969/j.issn.1000-1158.2017.06.21
		The environmental noise and frequency noise interference on EEG for further processing and analysis with the extremely disadvantageous influence. In view of the traditional wavelet coefficients by soft threshold de noise processing method of waveform distortion and hard threshold de noise processing method after the oscillation phenomenon, put forward a new wavelet coefficients nonlinear continuous function attenuation processing algorithm. By means of the wavelet coefficients of the nonlinear attenuation process, the low values of a continuous function between the end of wavelet coefficients between hard and soft threshold, effectively avoid the waveform distortion and oscillation. Processed EEG signal to noise ratio and mean square error are superior to the traditional wavelet denoising processing method.
		2017 Vol. 38 (6): 754-757 [Abstract] ( 657 ) HTML (1 KB) PDF (853 KB) ( 423 )

	758	Uncertainty Evaluation of NIM Spherical Near-field Antenna Calibration Facility
		MENG Dong-lin,WU Fan,WANG Wei-long
		DOI: 10.3969/j.issn.1000-1158.2017.06.22
		Some research is made for the uncertainty of normalized antenna radiation pattern (only amplitude) from NIM precise spherical near-field (SNF) antenna measurement facility (400 MHz to 110 GHz). There are 18 uncertainty items from probe, mounting, data sampling and radio-frequency system are introduced in brief, based on "self-comparison approach". A detail "perturbation method" is proposed to evaluate the scattering from the anechoic chamber based on the ray-tracing method; it is known that sometimes it is impossible to move the spherical system in the anechoic chamber to evaluate the scattering from the absorber. The evaluation results show that for NIM’s SNF facility, when the side lobe up to -40 dB, the repeatability is less than 0.1 dB (26GHz), and the expanded uncertainty for a normalized radiation pattern (amplitude) is 2.7 dB when ignoring the cross-polarization of the probe. Finally, the uncertainty characteristics of a SNF facility is summarized.
		2017 Vol. 38 (6): 758-762 [Abstract] ( 775 ) HTML (1 KB) PDF (1482 KB) ( 697 )

	763	Discussion on the Equations and Calculations in the E-field Calibration Standard of IEEE STD 1309—2013
		ZHOU Feng,WANG Jing-wei,XIONG Yu-fei,LIU Jian-zhe,RAN Zhi-qiang,LU Dai-jun
		DOI: 10.3969/j.issn.1000-1158.2017.06.23
		The theoretical derivation shows that the formula of electric field strength in TEM cell given by IEEE STD 1309—2013, which is commonly used in electric field metrology, is worthy of discussion. At the same time, the correction formula is deduced. The experimental results show that the difference between the corrected formula and the original formula is small under the experimental conditions, and it is difficult to distinguish the difference under the current verification conditions. To further improve the experimental verification, there are two possible technical directions.
		2017 Vol. 38 (6): 763-764 [Abstract] ( 520 ) HTML (1 KB) PDF (384 KB) ( 397 )

	765	Rapid Detection for Toxic Capsules with Chromium Based on Hyperspectral Imaging Technology
		CHEN Feng-nong, CHEN Pu-lan,XIE Ya-ping,YING Nan-jiao,Hamed Hamid Muhammed,YANG Yong
		DOI: 10.3969/j.issn.1000-1158.2017.06.24
		The rapid detection method of chromium content in medicinal capsules based on hyperspectral imaging was studied. Firstly, analysis of medical empty hard gelatin capsule was used as the control group by traditional atomic absorption spectroscopy. Then, the hyperspectral data of 1048 samples were analyzed by dimensionality reduction and qualitative analysis. Finally, the partial least squares discriminant analysis method was used to process the spectral data. If 4 LV are as input features in the partial lease squares discrimination analysis model, the classification accuracy reached 100%, the correlation coefficient of cross validation and sample prediction are 0.923 and 0.972, respectively. Sensitivity and specificity are both 100%.
		2017 Vol. 38 (6): 765-769 [Abstract] ( 451 ) HTML (1 KB) PDF (834 KB) ( 371 )

	770	Study on NOx Emission from Boiler Based on Quantum Adaptation Bird Swarm Algorithm
		NIU Pei-feng,WANG Qiu-ya,MA Yun-peng,ZHAO Qing-chong,CHEN Ke,ZHAO Zhen
		DOI: 10.3969/j.issn.1000-1158.2017.06.25
		For the problem that the conventional generalized predictive method are not capable to accurately predict the NOx emission generated by boiler, a new approach with combining the advantages of quantum adaptation bird swarm algorithm (QBSA) and fast learning network (FLN) is put forward to get boiler NOx emission concentration model. Compared with bird swarm algorithm (BSA), differential evolution algorithm and particle swarm optimization, QBSA algorithm has presented its advantage on optimization accuracy and convergence speed. Finally, the accuracy of the prediction by the way of QBSA-FLN and BSA-FLN are tested by using the sample data under different working conditions. It turns out that QBSA-FLN model can offer better generalization capability and more accurate forecasting on predicting the mass concentration of NOx emission.
		2017 Vol. 38 (6): 770-775 [Abstract] ( 625 ) HTML (1 KB) PDF (1616 KB) ( 531 )

	776	Compressed Prediction of Time Series Three-dimensional Fluorescence Spectroscopy
		YU Shao-hui,XIAO Xue,DING Hong,XU Ge
		DOI: 10.3969/j.issn.1000-1158.2017.06.26
		As the time series spectroscopy data is usually redundant and it is a non-stationary process, it is firstly compressed by the wavelet transform along both the time mode and the spectroscopy mode. The distortion rate of two-dimensional reconstruction is smaller than 0.1 and the similarity is lager than 0.99. As for the fluorescence region, the distortion rate of one-dimensional reconstruction is also smaller than 0.2 and the similarity is lager than 0.9. All this demonstrates the effectiveness of the compression by wavelet transform. After the compression, the prediction of time series spectroscopy data is completed by ARIMA(p,d,q) model and six different tests are discussed. Furthermore, it is compared with wavelet neural network prediction model. Numerical results show the effectiveness of compression and the fast and accurate ability of the model.
		2017 Vol. 38 (6): 776-779 [Abstract] ( 725 ) HTML (1 KB) PDF (767 KB) ( 411 )

	780	Research on Flue Gas Mercury Based on High Temperature Reduction and Differential Absorption Spectroscopy
		ZHENG Hai-ming,LI Chang-zhao
		DOI: 10.3969/j.issn.1000-1158.2017.06.27
		By means of high-temperature reduction method, the oxidized mercury will be reduced to elemental mercury without any catalyst, which is convenient for the monitoring of mercury in flue gas. Using differential optical absorption spectroscopy (DOAS) to inversion the concentrations of mercury, and then comparing that with the outcome resulted from experiment without the high-temperature device to verify the applicability of high temperature equipment, and to carry out experiments mixed with different concentrations of the elemental mercury and mercury oxidation. By probing into the impact of genetic algorithm, FFT and the integral area method on the concentration of mercury in flue gas based on the traditional DOAS algorithm, it’s turned out that the traditional algorithm is of contingency with a comparatively large overall error, while the Fourier transform inversion error is too large, the algorithm of integral area inversion has a lower error and a stable volatility than genetic algorithm and integral area inversion error minimum of 0.55%. The volatility of genetic algorithm is also not as stable as that of integral area inversion, which demonstrates that the integral area inversion is the most applicable for the inversion of low concentration of mercury.
		2017 Vol. 38 (6): 780-785 [Abstract] ( 587 ) HTML (1 KB) PDF (1842 KB) ( 353 )

	786	Research on Kα Energy Spectrum and Fluorescence Yield of Samarium
		HUO Bin-bin,CHEN Cheng,WU Jin-jie,ZUO Guo-ping,ZHANG Shuai,LI Ting
		DOI: 10.3969/j.issn.1000-1158.2017.06.28
		The relationship between fluorescence quality and thickness of radiator Sm2O3 or secondary filter CeO2 by simulating fluorescence instrument with MCNP program was described. When the thickness of Sm2O3 reached 0.4mm, K fluorescence yield is saturated. When the thickness of CeO2 was 0.55mm, Kα fluorescence purity optimum value is 96.6%. The results show that the higher X-ray tube voltage is, the bigger fluorescence yield is. Fluorescence purity reached optimum 82.26% when X-ray tube voltage was 80kV.
		2017 Vol. 38 (6): 786-789 [Abstract] ( 550 ) HTML (1 KB) PDF (1536 KB) ( 363 )

	790	Measurement of Young’s Modulus of Soft Tissue Mimicking Phantom by Indentation Test
		LIU Ke,YANG Li,TIAN Fei,ZHOU Xin,BIAN Xin
		DOI: 10.3969/j.issn.1000-1158.2017.06.29
		The measuring equipment of Young’ modulus of soft materials was developed based on indentation test. Finite element method (FEM) was utilized to determine the coefficients between Young’s modulus and indentation profiles. Then the Young’s modulus of elastic samples was calibrated by indentation method. Furthermore, the elastic phantoms were measured by commercialized transient elastography equipment. The agreements of measured elastic parameters and the results by indentation method are to verify the feasibility of elastic quantity’s transferring.
		2017 Vol. 38 (6): 790-793 [Abstract] ( 740 ) HTML (1 KB) PDF (799 KB) ( 579 )

	794	A Near Period-3 Feature Strategy to Improve the Extron Prediction
		CHEN Gong,LIU Chen-chen,ZHU Xi-fang,NI Yi,XU Qing-quan,DOU Xiao-ming
		DOI: 10.3969/j.issn.1000-1158.2017.06.30
		To improve the accuracy of the gene encoding (extron) prediction, near period-3 feature extrons prediction algorithm is proposed. Near period-3 clusting power spectrum of extrons and introns are extracted as template feature, DNA sequence whose extrons and introns ranges are unknown is divided into frames and moved. Compared with the template feature, the prediction of the Euclidean distance with different weights is realized from each frame. By changing the different feature, number, frame length, gene sequence weight and comparing with period-3 algorithm, the experiment results show that the prediction accuracy of the proposed algorithm is better than that period-3 algorithm.
		2017 Vol. 38 (6): 794-798 [Abstract] ( 660 ) HTML (1 KB) PDF (1722 KB) ( 343 )

	799	Technical Research on Calibration of Fully Automated ELISA Analyzers
		KANG Juan,WU Li-qing,YAN Zhen-yu,WANG Jun,SUN Jing-sheng
		DOI: 10.3969/j.issn.1000-1158.2017.06.31
		A calibration technique has been established to evaluate the testing performance of fully automated ELISA analyzers. The technique tests the accuracy and precision of adding module, the temperature of incubation module, the washing residue rate and cross contamination of washing module, and the absorbance stability, accuracy, precision and channel difference of reading module separately around the constituent modules of the system. 3 fully automated ELISA analyzers from different manufactures were chosen to validate the technique applicability. Results showed that the maximum adding bias and CV were -7.4% and 8.0% respectively, the incubation temperature bias was within ±0.5 ℃, the maximum washing residue rate was 0.8% and maximum cross contamination was 0.1%, the maximum absorbance fluctuation was 0.003 within ten minutes, the maximum absorbance bias and CV were 0.019 and 0.2% respectively for tested wavelengths and absorbance,the maximum channel difference was 0.005. The calibration technique was testified to be scientific and practical, and expected to be used to evaluate the fully automated ELISA analyzers effectively.
		2017 Vol. 38 (6): 799-802 [Abstract] ( 594 ) HTML (1 KB) PDF (320 KB) ( 391 )

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