- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Analysis of Fluorescence and Biodegradability of Wastewater
摘要： Three-dimensional fluorescence spectrometer was adopted for the content analysis of different types of organics in coking wastewater before biochemical treatment and through biochemical treatment, and the model of parallel factors was employed to analyze fluorescence components and contents. It was found that tryptophan-like components were the most easily degraded by biology, while humic-like components were the least easily degraded. Meanwhile, it had been seen that the change trends over time of total fluorescence densities of proteinoid fluorescence, and degradable organic fluorescence were highly consistent with that of parameter values of COD, NH3-N in this wastewater after analyzing the trends of the two indexes. It was proved that the three-dimensional fluorescence spectrum method was appropriate for the accurate degradation analysis of wastewater components.
关键词： Coking wastewater,Analysis and evaluation,Biodegradation,Parallel factors model,Three-dimensional fluorescence spectrum
更新于2025-11-14 15:23:50
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[ASME ASME 2018 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems - San Francisco, California, USA (Monday 27 August 2018)] ASME 2018 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems - Next Gen Test-Vehicle to Simulate Thermal Load for IoT FPGA Applications
摘要： As semiconductor device feature size scales and circuit performance increases, power dissipation and thermal management are becoming very important. Attention to thermal considerations is required throughout the chip development cycle from preliminary architecture planning to deployment on customer board and beyond. This paper describes a versatile thermal test vehicle that can be used to address these requirements. We discuss the architecture and implementation of a specially designed test-vehicle chip, followed by its operation. The programmability and flexibility of this vehicle will be highlighted. In addition, we cover other usage of this vehicle which includes modelling of chip-level thermal behavior with different floorplan, simulating thermal loads in IoT FPGA applications, cross-calibrating thermal numerical simulators with measured silicon data and evaluating the thermal impact of different package form-factor / material (such as thermal interface material) and cooling solutions. The abovementioned chip was fabricated using 0.18um technology and assembled in a flip-chip package. The reminder of this evaluation system is a simple, inexpensive tester from which a software is run to program the chip and to measure the spatial & temporal temperature values. Measured thermal data from different use cases are presented in this paper.
关键词： on-chip temperature measurement,thermal management,package development,package-level thermal evaluation,on-die heating,IoT servers,on-die temperature sensing,characterization methodology,thermal evaluation tool
更新于2025-09-23 15:23:52
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Application of Visible-near Infrared Spectral Imaging for Monitoring Biological Materials
摘要： N ear infrared (NIR) spectroscopy is a powerful tool for the non-destructive evaluation of biological materials due to its generally weak absorption bands. Biological materials such as wood and plant leaves have a complicated structure in which the distribution of chemical composition and surface structure is non-uniform. Therefore, an imaging technique which combines high spatial resolution with the ability to acquire signal from a wider sample area is required. Three-dimensional image data such as hyperspectral imagery or a movie file has plenty of both spectral and spatial information. However, the visible-near infrared (vis-NIR) spectrum and the time profile of a single pixel normally display strong multicollinearity, thus requiring multivariate analysis for effective extraction of valuable information from three-dimensional image data. This article introduces two examples of image analysis for the non-destructive monitoring of biological materials.
关键词： spectroscopy,multivariate analysis,NIR,imaging,biological materials,hyperspectral,non-destructive evaluation,infrared
更新于2025-09-23 15:23:52
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Application of blurred circular 3D images on the human vision model
摘要： By letting students simulate operations and games on a digital education operation system, schools are able to inspect learning achievement and teaching quality. In digital education area, we are able to use blockchain technology to simplify process, improve competition mode. It’s helpful improve efficiency and avoid the problem of opaque and falsification messages. Besides, it can provide unchangeable digital certification of academic achievement. Based on existing research foundation, against features on related users and services, especially the standard and trustful problem in competitions and evaluation mode nowadays, I studied competition mode based on blockchain technology, designed blockchain’s application mode and frame, analyzed evaluation criteria and algorithm, designed an operational skill evaluation model, developed an operational skill competition evaluation system based on e-business sandbox and experimented it.
关键词： digital education,evaluation model,blockchain,operational skill competition,fuzzy AHP,balanced score card
更新于2025-09-23 15:23:52
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Statistical validation of utility of head-mounted display projection-based experimental impression evaluation for sequential streetscapes
摘要： This study compared the impression structure of streetscapes gained from field experiments with that from head-mounted display virtual reality experiments. The results were as follows: (1) the field experiment experience had a slight influence on the impressions reported from the head-mounted display experiment; (2) few items exhibited significant differences in impression values for the two experiments; (3) the impression structure comprised three factors—'Openness,' 'Balance,' and 'Activity'—in both experiments, and (4) no significant difference appeared between the two experiments relative to the subscale scores of these three factors. These results show that head-mounted display experiments can substitute field experiments.
关键词： semantic differential method,virtual reality,Impression evaluation,omnidirectional camera,head-mounted display
更新于2025-09-23 15:23:52
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Spatial carrier phase shifting method for the phase recovery from two interferograms with closed fringes
摘要： A procedure is developed to recover the phase from two interferograms with a non-constant phase shift between them. This method may find broad applications when environmental disturbances do not allow implementing traditional phase shifting techniques which normally require three or more images. A spatial carrier phase shifting method is implemented to analyze the two measured temporal phase shifted interferometric images. This approach is very fast, avoids the use of fringe normalization techniques, preserves good tolerance against small (λ/20) or non-constant phase shifts, background and modulation variations and noise as tested in real and simulated data.
关键词： spatial carrier,interferogram evaluation,phase shifting,Fringe analysis,phase recovery
更新于2025-09-23 15:23:52
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A profile error evaluation method for freeform surface measured by sweep scanning on CMM
摘要： Coordinate measuring machines (CMMs) are widely used in evaluating the profile error of the freeform surfaces. Traditional trigger probes are inefficient at collecting large scale measurement sets. A CMM equipped with a sweep scanning probe dramatically improves the efficiency of inspection. However, the large scale data obtained by scanning is challenging for most existing profile error evaluation methods, which are based on iterative algorithms. This paper proposes an efficient and accurate method to evaluate the profile error of freeform surfaces. To simultaneously simplify the calculation and retain the accuracy of evaluation, a new method to extract key points from scanning data set is presented. First, the key points are defined as those measured points with regional outstanding deviations from the design surface. Second, wavelet decomposition is utilized to decompose the curves formed by the deviations of the measured points in the scanning data set, and the key points are extracted according to the decomposition results. In addition, the key points set, as a representation of the scanning data, are evaluated using Sequential Quadratic Programming (SQP) algorithm. Finally, a simulation example and an actual machined part are used to test the proposed evaluation method. The results prove that the proposed method is both accurate and efficient.
关键词： Key points extraction,Profile error evaluation,Freeform surface,Wavelet decomposition,Sweep scanning
更新于2025-09-23 15:23:52
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Nonrigid reconstruction of 3D breast surfaces with a low-cost RGBD camera for surgical planning and aesthetic evaluation
摘要： Accounting for 26% of all new cancer cases worldwide, breast cancer remains the most common form of cancer in women. Although early breast cancer has a favourable long-term prognosis, roughly a third of patients suffer from a suboptimal aesthetic outcome despite breast conserving cancer treatment. Clinical-quality 3D modelling of the breast surface therefore assumes an increasingly important role in advancing treatment planning, prediction and evaluation of breast cosmesis. Yet, existing 3D torso scanners are expensive and either infrastructure-heavy or subject to motion artefacts. In this paper we employ a single consumer-grade RGBD camera with an ICP-based registration approach to jointly align all points from a sequence of depth images non-rigidly. Subtle body deformation due to postural sway and respiration is successfully mitigated leading to a higher geometric accuracy through regularised locally affine transformations. We present results from 6 clinical cases where our method compares well with the gold standard and outperforms a previous approach. We show that our method produces better reconstructions qualitatively by visual assessment and quantitatively by consistently obtaining lower landmark error scores and yielding more accurate breast volume estimates.
关键词： Breast cancer treatment,Nonrigid registration,Depth camera,3D surface reconstruction,Aesthetic evaluation
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE 13th Image, Video, and Multidimensional Signal Processing Workshop (IVMSP) - Aristi Village, Zagorochoria, Greece (2018.6.10-2018.6.12)] 2018 IEEE 13th Image, Video, and Multidimensional Signal Processing Workshop (IVMSP) - Quantitative Evaluation of Salient Deep Neural Network Features Using Random Forests
摘要： The Deep Neural Networks and Deep Convolutional Neural Network have the property of providing multi-scale features at different layers of the network. Combination of these large number of features is one of the attributed reasons for the performance of the Neural Network (NN) on vision problems. This work uses Random Forests to identify robust features at various layers of the NN and evaluates the classification performance of these features in isolation. We propose a method for evaluation of parts of an already trained network using the selection by entropy maximization property of the Random Forests. We define measures for saliency in terms of contribution to the final classification, and evaluate the feature saliency. Simultaneously, a measure to identify the imperativeness of network features for classification is also formalized. The experiments made on a Hand dataset and the MNIST dataset, quantitatively validate various intuitions like the discriminatory nature of the outer layer features.
关键词： Random Forests,Feature Evaluation,CNN,Feature Selection
更新于2025-09-23 15:23:52
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Development of a sub-miniature gamma camera for multimodal imaging system
摘要： In the recent past, gamma-ray imaging detectors have achieved an intrinsic spatial resolution of less than 1 mm within a few centimeters of a useful field of view (UFOV). Unlike to conventional gamma cameras, which are large and heavy, the compact gamma-ray imaging detectors can improve the performances of the gamma cameras used in the various fields. In this study, we developed a sub-miniature gamma camera for a multimodal imaging system. The camera has a gamma-ray detector, miniature electronics modules, and a diverging hole collimator. The detector consisted of the sub-millimeter pixelated Ce:GAGG array and the silicon photomultiplier (SiPM) array module. We organized the miniature electronics modules according to the functions; an MPPC base board, analog signal processing board, integrated power supply board, and compact data acquisition (DAQ) base board. The diverging hole collimator widened an imaging area of the gamma camera from the UFOV of the detector. On the detector side, dimensions of each hole and septa were identical to the pixel and inter-pixel thickness of the reflector of scintillator array. For the intrinsic performance test, we acquired a flood map image of 729 (27 × 27) scintillator pixels, and the energy resolution was 18.9 % for an integrated energy histogram of 99mTc (140 keV). For the extrinsic performance test, we used the 57Co sheet source, and made a 99mTc line source using a capillary tube. The sources located at 10 cm apart from the collimator surface. The imaging area was three times wider than the UFOV of the detector. The system sensitivity was 19 CPM/μCi and the spatial resolution was 3.5 mm. The usability of the proposed gamma camera will not be confined to existing applications due to its compactness and novelty.
关键词： Sub-miniature gamma camera,Gamma camera performance evaluation,Front-end electronics,Multimodal imaging system,Diverging hole collimator
更新于2025-09-23 15:23:52