Chinese mask standards help Mongolia fight against coronavirus

正In response to Mongolia's demand for battling against the outbreak of novel coronavirus and developing mask standards,SAC agreed to present the existing Chinese mask standards to the Mongolian Bureau for Standard and Metrology,as it made a request on March 6.     

悬浮式生物芯片检测中的图像处理研究

介绍了悬浮式生物芯片的特点和检测方法,首次提出了完整的悬浮式生物芯片图像处理解决方案。使用预处理去除图像中的噪声并对图像予以增强,然后通过模式匹配技术识别样点,确定位置坐标,定位误差小于1个像素。用数学形态学方法圈定样点范围,并用掩模技术提取信号强度值。使用整体或局部法处理背景。结合图形化开发环境LabVIEW和IMAQ工具包进行整个图像处理的集成和实现。结果表明,该方法能有效完成悬浮式生物芯片检测中的图像处理任务。     

Road safety engineering: an effective tool in the fight against whiplash injuries

Road safety engineering can play an integral part in the prevention of whiplash injuries. While improvements to vehicle design can reduce the severity of whiplash injuries when a crash occurs, improvements to road safety can prevent whiplash-inducing crashes from occurring in the first place. Whiplash injuries are most commonly associated with rear end crashes. Unfortunately, rear end crashes are also the most common type of crash at urban signalized intersections, where the majority of crashes occur in British Columbia, Canada. The Insurance Corporation of British Columbia (ICBC), through the road improvement program, has been funding road improvements in order to reduce the frequency of collisions at high crash locations in British Columbia. Several road safety engineering countermeasures specifically targeted at rear end collisions have been researched and deployed. These countermeasures include simple and affordable solutions such as signal visibility enhancements, as well as complex and expensive solutions such as intersection geometric upgrades. When appropriately used, these countermeasures have proven to be extremely cost-effective in reducing the frequency of rear end collisions. Widespread application of signal visibility enhancements is now being pursued to further decrease the risk of rear end collisions and whiplash injuries. Costs are the direct cost of the ICBC portion of the investment and benefits are only those associated with reduced insurance claims over a 2-year period.     

Image processing for particle characterization

A highly efficient and automatic technique of particle characterization using digital image processing and analysis is presented. The process, centered on the selection of individual objects, is composed of five general steps: image acquisition, preprocessing, segmentation, extraction, and representation of the characteristic parameters. The implementation of this technique is done using the Khoros system. Synthetic images are used to test the segmentation algorithms and the form-factor process. The proposed technique can deal with several limiting problems such as background heterogeneity, touching or partially overlapping particles and a wide range of particle sizes and shapes. The performance of the method is illustrated by application to zirconia powder and to organic adipic acid particles on images obtained by light optical microscopy. The implemented method produces a statistical determination of various morphologic parameters including area, diameter, eccentricity, and form factor of the particles.     

China's fight against COVID-19 backed by international standards community

正China's efforts against COVID-19 were applauded at the annual meeting of World Standards Cooperation( WSC) taking place in Geneva on February 21, 2020. Presidents, Secretary-Generals and other high-level officers from ISO, IEC and ITU attended the event.     

图像处理在胶囊外形缺陷检测中的应用

在企业产品质量检测中,图像处理技术已经发挥着越来越重要的作用.现针对工业流水线上在线缺陷检测系统中的图像处理单元,对胶囊图像采用改进的中值滤波算法、双峰直方图法、形态学操作、Hough直线检测等方法进行处理,得到胶囊的面积、周长,胶囊壁的长度,胶囊两端圆弧的近似长度等特征参数,进而达到识别胶囊外形是否合格的目的.     

MATLAB与VB在图像处理中的应用

图像处理在解决工程问题中有着广泛的应用，本文用Visual Basic 6．0设计了应用软件的用户界面，结合了MATLAB来实现算法设计和图像处理，并讨论了四种MATLAB与VB集成方法的优劣，为图像处理提供了一种有效的解决手段。     

图像处理在晶圆瑕疵自动标记系统中的应用

针对传统晶圆测试手工标记瑕疵的不足,提出了应用机器视觉技术进行晶圆瑕疵的自动标记.首先,对晶圆图像进行预处理,提取晶圆边缘图像;其次,利用最小二乘法检测晶圆的直径.在此基础上通过坐标变换获得晶圆瑕疵的坐标,将其传递给探针台,由探针台自动将有瑕疵的晶圆剔除.最后,通过实验验证了该方法的实用性与有效性.     

Image processing in remote sensing data analysis: The state of the art

Image analysis techniques applicable to remote sensing data are reviewed, with emphasis on recent developments. The topics covered include image modelling, feature detection, segmentation and classification, texture analysis, and matching.     

PAMAM-modified citric acid-coated magnetic nanoparticles as pH sensitive biocompatible carrier against human breast cancer cells

Denderimer-modified magnetic nanoparticles are a promising drug delivery nanosystem which can improve the therapeutic efficacy of chemotherapy drugs and can also be beneficial as magnetic resonance (MR) images contrast agent. The present study introduces the preparation and characterization of the potential therapeutic efficiency of curcumin (CUR)-loaded denderimer-modified citric acid coated Fe₃O₄ NPs. Polyamidoamine (PAMAM, generation G₅) was used to encapsulate citric acid coated Fe₃O₄ nanoparticles. The successful preparation of CUR-loaded nanocarriers were confirmed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM), and transmission electron microscopy (TEM) techniques. The loading capacity and encapsulation efficiency of CUR molecules were 12?±?0.03% and 45.58?±?0.41%, respectively. The anticancer effect of void CUR and CUR-loaded nanocarriers were compared to each other by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay on treated MCF-7 cell line. It can be concluded that application of nanoparticles can be more effective strategy for controlled and slow release of CUR in human breast cancer treatment.     

多普勒全场测速技术中图像及数据处理

介绍了多普勒全场测速技术(DGV)图像及数据处理的方法和过程.图像处理过程中,经背景去除、灰度校正、几何校正等,能够有效滤除实验环境中的背景光,修正不同相机之间感光度不同的影响,校正流场区域在图像中的几何形状的形变.针对转盘测速实验图像进行处理,得到的速度分布与实际速度分布吻合较好,证明所采用的方法是可行的.     

Numerical and experimental investigation on the breast cancer tumour parameters by inverse heat transfer method using genetic algorithm and image processing

This study presents numerical and experimental investigation on breast cancer tumour parameters by inverse heat transfer method using genetic algorithm (GA) and image processing (IP) to determine the depth and rate of heat generation of a breast cancer tumour. To simulate the problem, using the energy equation in a cylinder including a heater, the surface temperature distribution was obtained. Then, the temperature surface of the cylinder was analysed by the GA in MATLAB software to determine the depth and rate of heat generation of heater. The validity of the numerical method was evaluated using the IP from a laboratory sample. A thermal heater was placed inside a cylinder and was covered by a tissue similar to the human body tissue. According to the obtained results, it was determined that the results of the laboratory sample and the numerical method were in agreement with each other. Finally, these steps were applied on the thermal image of a patient’s cancer breast to determine the depth and rate of heat generation of the breast tumour. It is shown that the average computational error between numerical and experimental results in this method to determine the depth of the tumour is about 8–10% and to determine the rate of tumour heat generation is about 0.01–1%.     

管道射线底片图像图形计算机处理技术

管道是一种重要的运输载体,检测其使用状况并进行分析决策具有重要的意义.射线检测可以透过管道及其包覆层成像,是一种可行的检测手段.传统的射线照相检测方法依靠人工对底片进行评读,准确性和效率难以保证.为此,我们提出了用于管道射线底片检测的图像图形计算机处理技术,并完成了相应的硬件和软件的系统设计.     

Use of magnetic nanoparticle heating in the treatment of breast cancer

Magnetic nanoparticles are promising tools for the minimal invasive elimination of small tumours in the breast using magnetically-induced heating. The approach complies with the increasing demand for breast conserving therapies and has the advantage of offering a selective and refined tuning of the degree of energy deposition allowing an adequate temperature control at the target. The biophysical basis of the approach, the magnetic and structural properties of magnetic nanoparticles are reviewed. Results with model targets and in vivo experiments in laboratory animals are reported.     

用于内表面测量的圆结构光视觉图像处理方法

简要介绍了用于内表面测量的圆结构光视觉系统,分析了内表面圆结构光视觉图像特征,并给出了干扰光条的产生原因。在此基础上,提出了干扰光条的剔除方法与有用光条图像中心的子像素级提取方法。介绍了基于阶跃边缘轮廓模型的边缘提取方法,该方法采用非线性优化方法进行模型参数估计,具有速度快、鲁棒性强、精度高的特点。