ACS Omega
·
2022
·
IF 4.132
Chenguang Yang,Jianqiang Yin,Liqin Wu,Qiuyu Zeng,Liwei Zhang
For coal and gangue, intelligent sorting processes for separation, the use of coal and gangue mineral components with different fundamental differences, and the study of different properties of minerals and coal with different scales and density regarding the gray value change law are presented. The results show that the gray value of single minerals and mixed minerals gradually decreases with the increase of their thickness and density. The greater the density of minerals, the smaller the gray value at the same thickness, and the same rule applies to different coal ranks. Via regression analysis methods, the values of the regression equation parameter a of pure minerals for graphite, quartz, kaolinite, and montmorillonite are 59.25, 65.69, 61.61, and 58.02 in the high-energy region, respectively. In the low-energy region, they are 174.95, 177.31, 186.95, and 161.81. For the regression equation parameter of mixed minerals in the form of two mixed minerals (graphite and quartz, kaolinite, or montmorillonite) and three kinds of mineral mixing (graphite–kaolinite and quartz; graphite–montmorillonite and quartz; graphite–kaolinite and montmorillonite), the gray values are 151.12, 156.00, 153.13,152.43, 152.98, and 151.98 in the high-energy region, respectively; in the low-energy region, they are 193.34, 201.34, 192.93, 191.26, 194.68, and 193.08. The phenomenon for the gray range of two kinds of single minerals locates in the range of mixed minerals that was formed from a single mineral observed after the regression equation of mixed mineral was verified by a single mineral, which agrees with the X-ray recognition pattern. In the end, as the density of coking coal, fat coal, and gas coal increases, the gray value decreases, which was in agreement with single- and mixed-mineral analyses.
研究领域:
矿业工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2022
·
IF 2.731
Xuechun Yan,Mingbin Liu,Hongbo Li,Suqin Wang
Silver is widely used, but the pollution caused by silver ions is also a problem that cannot be ignored. Detection of heavy metal ions based on bulky and costly analytical instruments had been developed very maturely in the laboratory. At present, the main detection methods of silver ion concentration include inductively coupled plasma mass spectrometry, atomic absorption spectrometry and inductively coupled plasma/atomic emission spectrometry. However, these testing methods have many problems to be solved, such as the high of instruments, high operating cost, numerous operational requirements, long testing time and complex processing technology. Nowadays, with the rapid and powerful development of smartphone technology, the new analytical methods based on smartphones equipped with a camera are being carried in the certain applied ideas. Here, the paper introduces a hand-held detection platform smartphone-based that allows the quantification of silver(I) ions with the detection limit of 0.659 mM. The Colour Grab software of android smartphone was applied to obtain R, G, B values of the photo of Rhodamine B solution remaining fluorescence, and then calculated the corresponding grey values by grey formula. The detection platform based on smart phones has the characteristics of cost-effective design and simple operation, as well as high sensitivity and selectivity. Therefore, compared with other detection methods, this method can be widely and conveniently applied to the detection of silver ions in the environment.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 5
·2253
·
IF 4.6
Rui-Juan Xiong,Yun-Xiao Ren,Yong-Feng Cui,Shu-Feng Cai,Wan-Li He,Xiao-Tao Yuan
In this paper, based on high-throughput technology, polymer dispersed liquid crystals (PDLC) composed of pentaerythritol tetra (2-mercaptoacetic acid) (PETMP), trimethylolpropane triacrylate (TMPTA), and polyethylene glycol diacrylate (PEGD 600) were investigated in detail. A total of 125 PDLC samples with different ratios were quickly prepared using ink-jet printing. Based on the method of machine vision to identify the grayscale level of samples, as far as we know, it is the first time to realize high-throughput detection of the electro-optical performance of PDLC samples, which can quickly screen out the lowest saturation voltage of batch samples. Additionally, we compared the electro-optical test results of manual and high-throughput preparation PDLC samples and discovered that they had very similar electro-optical characteristics and morphologies. This demonstrated the viability of PDLC sample high-throughput preparation and detection, as well as promising application prospects, and significantly increased the efficiency of PDLC sample preparation and detection. The results of this study will contribute to the research and application of PDLC composites in the future.Keywords:high-throughput;polymer-dispersed liquid crystal;saturation voltage;grayscale value
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENGINEERING STRUCTURES
·
2025
·
IF 6.4
Yafei Wang,Weiqian Liang,Wei Cai,Jingyi Zhang,Weijia Guo,Biyun Qi,He Zhang,Haibao Lu,Zhen Ding
4D printing marks a significant leap beyond traditional 3D printing, enabling structures to morph and adapt dynamically to changing environmental conditions. Research efforts are increasingly being focused on this promising technology. Existing 4D printing methods, however, typically rely on shape-changing mechanisms that operate after material solidification in the 3D printing process, necessitating additional energy inputs or even manual mechanical interventions. In this study, we introduce a novel 4D printing approach that employs a specially designed dual-stage curing ink optimized for grayscale Digital Light Processing (g-DLP) 3D printing. This novel approach not only grants precise, on-demand control over the material properties of the printed structures but also seamlessly integrates shape transformation into the thermal curing stage of the 3D printing process, eliminating the need for extra energy or manual steps. Furthermore, these transformed shapes demonstrate exceptional robustness and permanence, as evidenced by our experimental results. We conduct a comprehensive investigation into the grayscale-dependent mechanical properties of this ink and highlight its potential applications through auxetic metamaterial lattice structures. The underlying mechanism behind this direct shape morphing during thermal curing is explored in depth, and effectively demonstrated in achieving desired shape transformations across various printed structures. The good agreement between our experimental results and simulations provides robust validation of our methodology. Our study provides a reliable framework for designing and optimizing 4D-printed structures with tailored properties and deformation behaviors, paving the way for future applications in various fields.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
Light-Science & Applications
·
2022
·Vol. 11
·期 1
·1-11
·
IF 20.257
Liu Yanfeng,Al-salihi Mahmoud,Guo Yong,Ziniuk Roman,Cai Songtao,Wang Luwei,Li Yuan,Yang Zhigang,Peng Dengfeng,Xi Kai,An Zhongfu,Jia Xudong,Liu Liwei,Yan Wei,Qu Junle
Flexible organic materials that exhibit dynamic ultralong room temperature phosphorescence (DURTP) via photoactivation have attracted increasing research interest for their fascinating functions of reversibly writing-reading-erasing graphic information in the form of a long afterglow. However, due to the existence of a nonnegligible activation threshold for the initial exposure dose, the display mode of these materials has thus far been limited to binary patterns. By resorting to halogen element doping of carbon dots (CDs) to enhance intersystem crossing and reduce the activation threshold, we were able to produce, for the first time, a transparent, flexible, and fully programmable DURTP composite film with a reliable grayscale display capacity. Examples of promising applications in UV photography and highly confidential steganography were constructed, partially demonstrating the broad future applications of this material as a programmable platform with a high optical information density.
研究领域:
材料科学
·
光学
·
信息加密
✓ 已验证
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 5
·969
·
IF 3.2
Shipeng Chen,Jinglan Xu,Dingchuan Huang,Weiwei Zhang,Tian Zhang,Liangliang Xiong,Xiaoqiang Fan
The Ni-Au coating with its inherent chemical stability is recognized as an effective method for boosting corrosion resistance in humid environments while preserving exceptional electrical conductivity. However, its anti-corrosion performance is affected by the structure characteristics of the coating due to the high corrosion potentials of Au and Ni. To enhance its protection properties, the deposition process parameters, including deposition time, deposition current density, and zincating times, were investigated. The morphology and structure of the coatings were characterized, while its anti-corrosion performance was assessed through electrochemical and accelerated salt-spray tests. Eventually, the elevated current density in the Ni-Au coating resulted in reduced grain size and improved surface morphology, ensuring superior anti-corrosion performance. Additionally, extending the Ni deposition time provided a second physical barrier for the dense and thick Ni layer to resist the invasion of corrosive media. Furthermore, grey theory was applied to predict the service life of the Ni-Au coating. This research provides valuable insights and constructive guidance for optimizing Ni-Au coating in various engineering applications.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Yuchuan Qian,Guangchun Song,Minghui Yao,Haiyuan Yao,Tianhong Xu,Zheng Xu,Yuxing Li,Wuchang Wang
The usage of hydrate inhibitors is an effective method to solve the problem of flow assurance in deep-water pipelines. However, the mechanism of hydrate formation and transformation in inhibitor-containing systems is not well understood, and the research methodology needs to be innovated. In this study, a possible mechanism of wearing away during hydrate particle transformation was proposed for the first time, based on the hydrate growth process in the system containing the kinetic inhibitor N-vinyl caprolactam monomer. A method to analysed the hydrate growth and transformation dynamics through the change of gray level in the image was proposed. And the hydrate growth process was divided into three different stages based on the trend analysis of the gray level data of the images,trends in the dynamics of hydrate particle growth within the bulk phase corresponding to changes in gray level were verified. On this basis, the effects of stirring rate, subcooling and the monomer concentration of the NVCap on the growth of hydrates were discussed, and it was suggested that there might be differences in the mechanisms exhibited by the inhibitor at different growth stages of hydrates. In this study, the process of analysing the internal growth dynamics of hydrate systems through image gray levels was reported for the first time, and its trend changes corresponding to hydrate growth dynamics were verified, which proved the feasibility of this method, and this study provides an innovative research methodology and idea for the study of the dynamics of hydrate generation and transformation.
研究领域:
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
Micro & Nano Letters
·
2024
·Vol. 19
·期 3
·e12200
·
IF 1.5
Rongguang Zhang,Xun Chen,Han Wang,Jun Zeng,Xuanzhi Zhang,Xiaojie Chen
Multi-needle electrospinning is a simple and general method for mass preparation of nanofiber membrane, which has great industrial potential. However, the bending instability produced in the electrospinning process makes that the deposition uniformity of the nanofiber is still a big concern, resulting in non-uniform nanofiber membrane, which seriously affects the application of electrospun membrane in environmental filtration, new energy and medical fields. In order to improve the uniformity of nanofiber deposition in multi-needle electrospinning, an auxiliary flow field system (AFF) is proposed, which can effectively improve the uniformity of nanofiber deposition. After image processing, the uniformity of nanofiber deposition is quantified with the index of grey distribution, and the effectiveness of this method is verified. Combined with the multi-physical field analysis, the influence mechanism of cross-wind field on the uniformity of fibre deposition was revealed. By optimizing the experimental parameters, the non-uniformity of nanofiber deposition was reduced by 49.19%. Based on multi-needle electrospinning technology, a reliable idea (AFF) and experimental basis are provided for the uniform preparation of nanofiber membrane.
研究领域:
材料科学
·
环境工程
·
医学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of X-Ray Science and Technology
·
2024
·
IF 1.7
Yichi Zhang,Fen Tao,Ruoyang Gao,Ling Zhang,Jun Wang,Guohao Du,Tiqiao Xiao,Biao Deng
BackgroundK-edge subtraction (KES) tomography has been extensively utilized in the field of elemental sensitive imaging due to its high spatial resolution, rapid acquisition, and three-dimensional (3D) imaging capabilities. However, previous studies have primarily focused on the qualitative analysis of element contents, rather than quantitative assessment.ObjectiveThe current study proposes a novel method for quantitative elemental analysis based on K-edge subtraction tomography.MethodsThe linear correlation between the slice grayscale of standard samples and the difference in their linear absorption coefficients is confirmed. This finding suggests that the grayscale data from slices may be employed to perform quantitative estimations of elemental compositions.ResultsIn order to verify the accuracy and validity of this method, the target element contents in standard and actual samples are quantitatively analyzed, respectively. The results demonstrate that the method is capable of achieving nanometer-resolved quantitative elemental sensitive imaging with a relative error of less than 3% in the target elemental content.ConclusionsThe method described in this paper is expected to expand the scope of applications for K-edge subtraction tomography and provide a novel approach to achieve more precise and convenient quantitative elemental analysis.
研究领域:
医学影像学
·
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Ke Ning,Huihui Chai,Yanxia Cui,Shiming Wu,Feng Chen,Yuan Li,Ping Qiu,Wei Sun,Ling Yu
Elevating blood ß 2 microglobulins (ß 2 M) level is one of the indicators of diseases such as diabetes, kidney failure, and tumors. A centrifugal microfluidic chip was designed to conduct latex immunoagglutination assays for testing ß 2 M. A handhold centrifuge was assembled to drive solution mixing in the microfluidic chip. An office scanner recorded the binding of ß 2 M to the latex beads induced agglutination, reducing reliance on expensive scientific equipment and avoiding environmental light interference. The results revealed that the degree of beads agglutination was proportional to the grayscale value changes (∆G). The ß 2 M testing can be accomplished using a 1.25 µL blood sample, and the testing time is 10 min. The limit of detection is 0.0335 mg/L. The recovery rate calculated by the measured and spiked ß 2 M concentration ratio is 91.8–111.8%. The centrifugal chip was applied to test 50 patients’ samples. The confusion matrix analyzed the rate of false positives, false negatives , true positives, and true negatives for the ß 2 M chip-based test, showing the sensitivity of the ß 2 M chip is 77.3%, the specificity is 82.1%, and the efficiency is 80%. The Area Under the Curve analysis shows that the cutoff value (∆G = 1.011) of ∆G in predicting ß 2 M elevating has a sensitivity of 100% (95% CI: 92.87% −100%) with the specificity of 92% (95% CI:81.6–96.85%).
研究领域:
医学诊断
·
生物医学工程
·
临床检验
✓ 已验证
DOI
高影响因子
JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS
·
2011
·Vol. 12
·期 06
·769-781
·
IF 0.215
ÁKOS ZARÁNDY,CSABA REKECZKY,PÉTER FÖLDESY,ISTVÁN SZATMÁRI
The first CNN technology-based, high performance industrial visual computer called Aladdin is reported. The revolutionary device is the world premier of the ACE4k Cellular Visual Microprocessor (CVM) chip powering an industrial visual computer. One of the most important features of the Aladdin system is the image processing library. The library reduces algorithm development time, provides efficient codes, error free operation in binary, and accurate operation in grayscale nodes. Moreover the library provides an easy way to use the Aladdin system for those who are not familiar with the CNN technology.
研究领域:
计算机视觉
·
工业计算
·
嵌入式系统
·
图像处理
·
人工智能
✓ 已验证
DOI
高影响因子
Materials Today
·
2022
·
IF 26.943
Yanfang Niu,Xiao Yang,Jiajia Li,Yi Zeng,Keliang Liu,Wang Wan,Junlong Liao,Mengxiao Wei,Sen Li,Junning Zhang,Zhejun Chong,Xin Du,Zhongze Gu
Controlling surface properties in a spatiotemporal and reversible manner is highly attractive for novel functional surfaces, as it allows them to act in a much smarter way. Surface modification strategies based on photochemical metathesis reactions are seemed as promising solutions for such demands, due to their high spatiotemporal controllability and the perfect reversibility. In this paper, we demonstrate a powerful strategy to precisely manipulate the surface functions by the combination of wavelength-controlled disulfide-diselenide dynamic photochemistry and a 405 nm digital light processing (DLP) projector. We show that, by this method, the arrangement of chemical moieties on a disulfide surface can be exactly controlled, leading to complex patterned surfaces with multinary and grayscale molecular distributions. Moreover, owing to the wavelength-dependent reactivity of the -S-S- and -S-Se- groups, the surface functions can be selectively and dynamically adjusted by light with different colors (wavelength). Based on these unique features, the chemical moieties on every point of the surface can be exactly controlled and dynamically manipulated by our strategy, making the generated surfaces quite versatile and smart. We demonstrate the successful application of this method in high-level information encryption and transformation.
研究领域:
材料科学
·
表面化学
·
光化学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）