QR bar codes are prototypical images for which part of the image is a priori known (required patterns). Open source bar code readers, such as ZBar, are readily available. We exploit both these facts ...to provide and assess purely regularization-based methods for blind deblurring of QR bar codes in the presence of noise.
Abstract
This paper proposes an efficient and accurate method of two-dimensional code recognition for industrial actual projects, and develops a high-speed and batch two-dimensional code recognition ...system based on machine vision. Firstly, according to the position of the QR code in the target subspace, a method to locate the region of interest of each QR code by using geometric relationship and batch processing QR code is proposed. On this basis, Gaussian noise is added to simulate the possible noise in production practice, and the anti-noise ability of the system is evaluated. Finally, the relationship between system recognition rate and QR code movement speed is analyzed and the experimental results are compared. The experimental results show that the system can meet the requirement of real-time online detection.
This paper introduced design and application of a bar-code scanning device for nucleic acid testing. The bar-code scanning device has been designed for holding smart phones with different size, and ...it can reduce the influence of outdoor light on bar-code scanning. (本文介绍一种核酸检测用辅助扫码装置设计与应用, 该装置适用于不同尺寸的手机进行辅助扫码, 能够避免外界光线可能对扫码产生的影响。)
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•Informative wafers (info-wafers) by 3D printing, coding and photopolymerization.•Braille code, bar code and quick response (QR) code are applied.•QR code info-wafers are ...smartphone-scanned to connect to the website.•Rapid drug release from clonidine hydrochloride (CH) QR code info-wafers.
3D printing is used in manufacturing of personalized and customized medications. Moreover, information technology has been integrated with 3D printing, which builds the basis of informative medications. Here, clonidine hydrochloride (CH) was formulated in informative wafers (info-wafers) by combination of 3D printing, code design and photopolymerization. Braille code (recognized by blind persons), bar code, and quick response (QR) code were used for the design of info-wafers. A code positive mold was 3D-printed with rigid resins by stereolithography, which was transformed to the silicone negative mold by thermal polymerization. A homogeneous CH suspension in N-vinyl pyrrolidone was casted into the negative mold followed by photopolymerization to form CH info-wafers. The bulgy parts of info-wafers were painted with edible ink except for Braille code info-wafers. The CH in info-wafers maintained the amorphous state, which was demonstrated by X-ray diffraction. The amorphous CH had rapid dissolution. Bar code info-wafers were scanned by smartphone though only simple information was obtained. QR code info-wafers were smartphone-scanned to link a website that contained sufficient information such as the instruction of CH application and the collection of patient information. Info-wafers provide online drug information and use instructions for patients to make the treatment standardization and normalization.
A MOF-based bio-bar code material was synthesized and firstly applied to develop an electrochemical streptomycin (STR) aptasensor. By using MOF-based bio-bar code and enzyme-assisted target recycling ...for dual-signal amplification, highly sensitive detection of STR was achieved. The sensing surface was simply fabricated by immobilizing a mixed monolayer of thiolated cDNA/aptamer duplexes (dsDNA) and 6-mercapto-1-hexanol (MCH) on the gold nanoparticle modified screen printed carbon electrode (Au/SPCE). The presence of target STR caused highly efficient removal of the aptamers from dsDNA assisted by Exo I enzyme. Then MOF-based bio-bar codes were backfilled to achieve the adsorption of electroactive Ru(NH3)63+ (RuHex) on electrode surface. The electrochemical signal of the surface-confined RuHex was used for quantitation. The analytical performance for STR was satisfactory with a wide linear range of 0.005–150 ng mL−1, a low detection limit of 2.6 pg mL−1 and a good selectivity towards other three antibiotics. Moreover, the application of this aptasensor for determination of STR in real milk samples was also realized. With these merits, this dual-signal amplification assay might provide one of the effective ways for food safety monitoring.
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•A MOF-based bio-bar code material was synthesized and firstly applied to develop a sensitive streptomycin aptasensor.•Different signal amplification strategies were integrated in one sensing protocol to push down the detection limit.•This aptasensor was successfully applied in detecting streptomycin in real milk samples.
In order to improve the acquisition efficiency of bar code acquisition technology and the management efficiency of enterprises in the Internet of things, and bring more benefits to related ...enterprises, the barcode technology of perception layer in the Internet of things was added into the enterprise resource planning system, thus getting an effective and convenient barcode acquisition system. The research results show that the circuit board of the automatic barcode acquisition system studied here is based on the built-in barcode program and joined the enterprise resource planning system. It realizes the connection and integration of the two, which can not only run independently, but also simultaneously, to a large extent, playing its role. It can be seen that the integration of the barcode technology of the perception layer in Internet of things and the enterprise resource planning system can obtain a new industrial automatic barcode acquisition system. It can not only meet the requirements of barcode acquisition, but also improve the efficiency of barcode acquisition, which can be used for reference for manufacturing enterprises in terms of projects that produce according to the order.
Abstract
Enterprise logistics management is an important factor to promote the development of enterprises. Under the environment of electronic commerce, modern enterprise logistics management needs ...to make reasonable use of computer technology. This paper firstly explains the existing problems of logistics management innovation at the present stage and the characteristics and advantages of computer information management technology, and explores the specific technology of computer technology applied in modern logistics for readers’ reference.
The fast rhythm of our lives makes it hard for us to find time to cook. When we do, we often have to choose between the commodity of cooking the same familiar food several times and the uncertainty ...of trying something new. This paper introduces AREasyCooking, an application which uses new technologies to help a user make healthier decisions about their culinary habits. Thus, using augmented reality and bar code reading, AREasyCooking helps users bring in the application the ingredients they have available. The application uses two major sources of recipes (well-known cooks and traditional recipes) to offer users possible variants of dishes with available ingredients. Finally, AREasyCooking guides users step by step through videos in preparing the recipe. Controlling these movies is done with the help of the eyes and the voice since hands are busy cooking.
Herein, a photothermal triggered multi-signal readout (MSR) system was innovatively established with great convenience for low-cost and sensitive point-of-care testing (POCT). In this sensing system, ...an intelligent multi-signal readout interface (MSRI) with multidimensional response-ability to thermal stimulus was developed and utilized as a sensing element. A bio-bar-code photothermal probe peptides@H2N-HCNTs acted as a target associated photothermal agent anchored on MSRI via competitive reaction. The multi-signal assay of target was realized under the driven of 808 nm laser, photo-to-thermal conversion effect of photothermal probe caused dramatically thermal energy increase on MSRI. As a result, the competitive recognition events were translated into several detectable signals on MSRI, including a local temperature elevation, a visual color change from blue to green as well as weight loss on MSRI, all of these signals were proportional to the target concentration. This assay has been successfully applied in field work for detecting zearalenone (ZEN), a common mycotoxin in grain food, with linear ranger from 10−7 ng/mL to 10−1 ng/mL and detection limits of 1.06 × 10−7 ng/mL. Combination of the different signal principles was expected to result in more reliable and precise results. Accordingly, this creatively designed MSR-system not only provided a platform for sensitive monitor of mycotoxin but also offered new method for reliable and affordable personal assays in daily life and low-resource setting.
•A multi-signal readout system was proposed for sensitive point-of-care testing.•An interface with multidimensional response ability to thermal stimulus was utilized as a smart sensing element.•The bio-bar-code photothermal probe induced several detectable signal responses on MSRI.•The mutual calibration between different signals improved precision in positive judgments.•A common mycotoxins zearalenone was selected as a target analyte.
Tau is a microtubule-associated protein which regulates the assembly and stability of microtubules in the axons of neurons. Tau is also a major component of neurofibrillary tangles (NFTs), a ...pathological hallmark in Alzheimer's disease (AD). A characteristic of AD tau is hyperphosphorylation with more than 40 phosphorylation sites. Aggregates of hyperphosphorylated tau are also found in other neurodegenerative diseases which are collectively called tauopathies. Although a large number of studies have been performed on the phosphorylation of AD tau, it is not known if there is disease-specific phosphorylation among tauopathies. This is due to the lack of a proper method for analyzing tau phosphorylation
. Most previous phosphorylation studies were conducted using a range of phosphorylation site-specific antibodies. These studies describe relative changes of different phosphorylation sites, however, it is hard to estimate total, absolute and collective changes in phosphorylation. To overcome these problems, we have recently applied the Phos-Tag technique to the analysis of tau phosphorylation
and
. This method separates tau into many bands during SDS-PAGE depending on its phosphorylation states, creating a bar code appearance. We propose calling this banding pattern of tau the "phospho-tau bar code." In this review article, we describe what is newly discovered regarding tau phosphorylation through the use of the Phos-Tag. We would like to propose its use for the postmortem diagnosis of tauopathy which is presently done by immunostaining diseased brains with anti-phospho-antibodies. While Phos-tag SDS-PAGE, like other biochemical assays, will lose morphological information, it could provide other types of valuable information such as disease-specific phosphorylation.
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