检索结果-内蒙古大学图书馆

3rd International Conference on Electronics and Communication;Network and Computer Technology (ECNCT)

作者： Li Dong Huang Xuan Ni Huasheng Tang Wudia Anhui Univ Inst Phys Sci Hefei 230601 Anhui Peoples R China Anhui Univ Inst Informat Technol Hefei 230601 Anhui Peoples R China Chinese Acad Sci CAS Hefei Inst Technol Innovat Engn Hefei Inst Phys Sci Hefei 230031 Anhui Peoples R China

ISBN: (数字)9781510652118

ISBN: (纸本)9781510652118;9781510652101

Aiming at the problems of small separation range and low separation rate in the intelligent separation of coal and gangue, a threshold separation method based on dual-energy X-ray technology is proposed. Low-energy original image, use ratio method to obtain R-value image, integrate R-value image and low-energy image information to fit the R-L curve of coal and gangue, count characteristic values and draw sample distribution maps, calculate the sorting threshold of coal and gangue, and realize coal and the sorting of gangue. The experimental results show that the threshold sorting algorithm is more effective in improving large-size materials than the traditional R-value recognition algorithm and R-L curve fitting algorithm, and the recognition rate of 150-300mm materials is as high as 96.99% and 92.32%.

关键词： gangue sorting dual-energy X-ray R value curve fitting algorithm

来源：评论

学校读者我要写书评

暂无评论

Two Entangled Electrons (Photons) Microscopy

Two Entangled Electrons (Photons) Microscopy

引用

SPIE Future Sensing Technologies Conference

作者： Nejad, Akbar Rahmani Nejad, Ali Rahmani Knowledge Bridge Co 5 Niloofar St Tehran *** Iran Inst Adv Studies Basic Sci Dept Comp Sci Zanjan Iran

ISBN: (纸本)9781510638624;9781510638617

Inspired by the concept of quantum entangled radars, the extraordinary and utterly innovative concept of no-detectors microscope-imaging by the implementation of entangled quantum particles such as electrons as the probe of the microscope is touched on. Instead of simultaneous measurement of two entangled particles, we propose repetitive measuring idler electrons in two conditions;when the object does not reflect the signal that means there is an entanglement exists. Otherwise, when entanglement is broken or degraded, it means a reflection or absorption of the signal electron. It is showed that the repetitive measurement of entanglement among a sequence of idlers in the two above mentioned conditions approaches different values. When entanglement measurement showed the collapse of entanglement, it concludes the hitting of the probe particle to the object has happened. The number of broken entanglement between idle electrons is considered proportional to the number of detected electrons by the detector and imaging is accomplished by this assumption. For a 3D visualization of the object, a curve fitting algorithm available in the field of Computer Science is applied. The fitted curve illustrates an approximate surface of the object.

关键词： entangled electrons microscopic imaging enhancing image resolution detector-less microscopic image entanglement among idlers curve fitting algorithm

来源：评论

学校读者我要写书评

暂无评论

Focusing of light through turbid media by curve fitting optimization

引用

OPTICAL ENGINEERING 2016年第12期55卷

作者： Gong, Changmei Wu, Tengfei Liu, Jietao Li, Huijuan Shao, Xiaopeng Zhang, Jianqi Xidian Univ Sch Phys & Optoelect Engn 2 South Taibai Rd Xian 710071 Shaanxi Peoples R China

The construction of wavefront phase plays a critical role in focusing light through turbid media. We introduce the curve fitting algorithm (CFA) into the feedback control procedure for wavefront optimization. Unlike the existing continuous sequential algorithm (CSA), the CFA locates the optimal phase by fitting a curve to the measured signals. Simulation results show that, similar to the genetic algorithm (GA), the proposed CFA technique is far less susceptible to the experimental noise than the CSA. Furthermore, only three measurements of feedback signals are enough for CFA to fit the optimal phase while obtaining a higher focal intensity than the CSA and the GA, dramatically shortening the optimization time by a factor of 3 compared with the CSA and the GA. The proposed CFA approach can be applied to enhance the focus intensity and boost the focusing speed in the fields of biological imaging, particle trapping, laser therapy, and so on, and might help to focus light through dynamic turbid media. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)

关键词： turbid media focusing curve fitting algorithm continuous sequential algorithm

来源：评论

学校读者我要写书评

暂无评论

The suitable dose range for the calibration of EBT2 film by the PDD method with a comparison of two curve fitting algorithms

引用

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 2015年 777卷 85-90页

作者： Chang, Liyun Ho, Sheng-Yow Lee, Tsair-Fwu Yeh, Shyh-An Ding, Hueisch-Jy Chen, Pang-Yu I Shou Univ Dept Med Imaging & Radiol Sci Kaohsiung Taiwan Chi Mei Med Ctr Dept Radiat Oncol Tainan Taiwan Natl Kaohsiung Univ Appl Sci Dept Elect Engn Med Phys & Informat Lab Kaohsiung 807 Taiwan E Da Hosp Dept Radiat Oncol Kaohsiung Taiwan Sinlau Christian Hosp Dept Radiat Oncol Tainan Taiwan

EBT2 Film is a convenient dosimetry quality assurance (QA) tool with high 2D dosimetry resolution and a self development property for use in verifications of radiation therapy treatment planning and special projects;however, the user will suffer from a relatively higher degree of uncertainty (more than +/- 6% by Hartmann el. al. [29]), and the trouble of cutting one piece of film into small pieces and then reintegrating them each Lime. To prevent this tedious cutting work, and save calibration time and budget, a dose range analysis is presented in this study for EBT2 film calibration using the Percentage-Depth-Dose (PDD) method. Different combinations of the three dose ranges, 9-26 cGy, 33-97 cGy and 109-320 cGy, with two types of curve fitting algorithms, film pixel values and net optical densities converting into doses, were tested and compared. With the lowest error and acceptable inaccuracy of less than 3 cGy for the clinical close range (9-320 cGy), a single film calibrated by the net optical density algorithm with the dose range 109-320 cGy was suggested for routine calibration. (C) 2014 Elsevier B.V. All rights reserved.

关键词： EBT2 film Film calibration PDD method Dose range curve fitting algorithm

来源：评论

学校读者我要写书评

暂无评论

Platinum RTD sensor based multi-channel high-precision temperature measurement system for temperature range -100 degrees C to +100 degrees C using single quartic function

引用

COGENT ENGINEERING 2018年第1期5卷 1-15页

作者： Sarkar, Shantanu L&T Technol Serv Machinery Houston TX 77042 USA

A method and system for measuring multiple temperature points using two wire configuration Resistance Temperature Detectors (RTD) for temperature range -100 degrees C to +100 degrees C is mainly composed of the Micro Controller Unit (MCU), analog-digital converter (ADC), reference Voltage source, Multiplexers (MUX) and resistance network including the RTD temperature sensors. The RTDs are sequentially scanned using a reference/constant voltage source, and resistance values of the RTDs are calculated based on the voltage measured across the RTDs and the current sensing resistor. Improving the precision of temperature measurement is based on a line fitting algorithm-Newton's divided differences interpolation polynomial based on three reference resistor values representing two extreme end points and the center point of the temperature range for which the system is made. The test results show that the device temperature measurement precision can reach +/- 0.02 degrees C, has the advantage of using a single quartic function for the entire temperature range -100 degrees C to +100 degrees C with dynamic calibration to address errors related to in-circuit resistance, tolerance, temperature coefficient, linearity and offset errors in the circuit, and also supports detection of degradation of linearity and offset in the circuit because of the aging factor.

关键词： RTD PT100 PT1000 nonlinearity correction nonlinear circuits signal processing Callender-Van Dusen method high precision temperature measurement Newton's divided differences interpolation polynomial curve fitting algorithm

来源：评论

学校读者我要写书评

暂无评论

Dual fitting for Sub-Pixel Edge Detection of High Temperature Image 7

Dual Fitting for Sub-Pixel Edge Detection of High Temperatur...

引用

7th International Symposium on Precision Mechanical Measurements (ISPMM)

作者： Lu Yu Lu Rong-Sheng Guo Guang-Ping Hefei Univ Technol Sch Instrument Sci & Optoelect Engn Hefei Peoples R China Beijing Inst Aeronaut Mat Aeronaut Mat Testing & Res Ctr Beijing Peoples R China

ISBN: (纸本)9781510601673

This paper describes a method of non-contact distance measurement in high temperature environments by video extensometer. In order to detect the distance of a pair of marked lines on the surface of the specimen, dual fitting algorithms are proposed. The first fitting method which is least squares curve fitting utilizes hyperbolic tangent function to fit a serial of discrete gray level points to a curve. So a set of edge points on the marked line was located. The second is to use orthogonal linear least squares method to fit two sets of edge points to two lines respectively. After the two lines are located, the distance of two lines can be computed. A video extensometer system which enables a high temperature distance measurement up to 1200 degrees C is presented and demonstrated by experimental measurements.

关键词： High temperature image Sub pixel edge detection curve fitting algorithm

来源：评论

学校读者我要写书评

暂无评论

A hybrid method for parameter estimation and its application to biomedical systems

引用

COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2008年第2期89卷 112-122页

作者： Alonso, Hugo Mendonca, Teresa Rocha, Paula Univ Porto Fac Ciencias Dept Matemat Aplicada P-4169007 Oporto Portugal Univ Aveiro Dept Matemat P-3810193 Aveiro Portugal

A general version of a hybrid method for parameter estimation is presented with a theoretical support and an illustrative example of application. This method consists of a curve fitting algorithm that takes the initial estimate of the parameterization from an artificial neural network. The idea is to improve the convergence of the algorithm to the sought parameterization using a close initial estimate. The motivation arises from biomedical problems where one is interested in obtaining a meaningful estimate so that it can be used for both description and prediction purposes. Two strategies are proposed for the application of the hybrid method: one is of general applicability, the other is intended for systems defined by the series connection of various blocks. The feasibility of the method is illustrated with a case study related to the neuromuscular blockade of patients undergoing general anaesthesia. (c) 2007 Elsevier Ireland Ltd. All rights reserved.

关键词： curve fitting algorithm artificial neural network neuromuscular blockade

来源：评论

学校读者我要写书评

暂无评论

Pickup lens inspection on the 5th order aberration using shearing interference by grating with curve fitting algorithm

引用

OPTICAL REVIEW 2001年第6期8卷 463-468页

作者： Tadada, K Nakajo, M Matsushita Elect Ind Co Ltd Prod Engn Lab Kadoma Osaka 5718502 Japan Matsushita Elect Ind Co Ltd Mfg Proc Engn Ctr Corp Prod Engn Div Kadoma Osaka 5718502 Japan

An optical system based on shearing interference using diffraction grating was applied, to carry out the aberration inspection process of the pickup lens of a digital versatile disc (DVD) at high speed. An algorithm was devised that processes points allocated on certain lines on a fringe and fits relations between the distance from basis point to the measurement points, and phase data of the fringe at these points to an equation of higher degree as curve fitting. Aberration was numerically estimated as the size of a certain coefficient. Simulation showed that this algorithm could detect all 5th order aberrations independently. An inspection system developed based on this optical system and algorithm detected aberration as accurately as a conventional interferometer that has been used as the standard, attaining an inspection time of 1/10-1/20. In comparison with the spot method, this system has 5th order aberration detecting ability and 1/3 the inspection time.

关键词： digital versatile disc pickup lens inspection reflective diffraction grating shearing interference spherical wavefront curve fitting algorithm

来源：评论

学校读者我要写书评

暂无评论

PIECEWISE CUBIC curve fitting algorithm

引用

MATHEMATICS OF COMPUTATION 1987年第179期49卷 203-213页

作者： YAN, Z School of Mathematics Georgia Institute of Technology United States

Abstract: We give a piecewise cubic curve fitting algorithm which preserves monotonicity of the data. The algorithm has a higher order of convergence than the Fritsch-Carlson algorithm and is simpler than the ... 详细信息

关键词： curve fitting algorithm monotonicity preserving cubic spline

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：