Wyniki wyszukiwania - Biblioteka Nauki

1

Fast edge detection approach based on global optimization convex model and Split Bregman algorithm

100%

Jing Y. , Liu J. , Liu Z. , Cao H.

Diagnostyka

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2018

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tom Vol. 19, No. 2

23--29

EN

Active contour model is a typical and effective closed edge detection algorithm, which has been widely applied in remote sensing image processing. Since the variety of the image data source, the complexity of the application background and the limitations of edge detection, the robustness and universality of active contour model are greatly reduced in the practical application of edge extraction. This study presented a fast edge detection approach based on global optimization convex model and Split Bregman algorithm. Firstly, the proposed approach defined a generalized convex function variational model which incorporated the RSF model’s principle and Chan’s global optimization idea and could get the global optimal solution. Secondly, a fast numerical minimization scheme based on split Bregman iterative algorithm is employed for overcoming drawbacks of noise and others. Finally, the curve evolves to the target boundaries quickly and accurately. The approach was applied in real special sea ice SAR images and synthetic images with noise, fuzzy boundaries and intensity inhomogeneity, and the experiment results showed that the proposed approach had a better performance than the edge detection methods based on the GMAC model and RSF model. The validity and robustness of the proposed approach were also verified.

2

MiR-539-5p alleviates sepsis-induced acute lung injury by targeting ROCK1

100%

Meng L. , Cao H. , Wan C. , Jiang L.

Folia Histochemica et Cytobiologica

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2019

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tom 57

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nr 4

3

Sound Insulation Property of Threedimensional Spacer Fabric Composites

100%

Cao H. , Yu K. , Qian K.

Fibres & Textiles in Eastern Europe

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2014

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tom Vol. 22, no. 4 (106)

64--67

EN

Three-dimensional spacer fabric composites (3D composites) are new sandwich structure composites which not only have high specific strength, high specific stiffness, light weight, better integrity, and good designability but also have an excellent sound insulation property and heat-proof performance owing to special sandwich structures. Some 3D composites with different pile heights, face-sheet thicknesses and pile structures were manufactured in order to discuss the relationship between the sound insulation properties and structures of the 3D composites in the paper. Different reverberation-anechoic chamber methods were used to study the sound insulation property. The results showed that three-dimension spacer fabric composites had excellent sound insulation properties, increasing with an increase in pile height and face-sheet thickness, and the sound insulation property of “8”-shaped pile structures were better than that of “88”-shaped ones. The results would offer important guidance for structure optimisation and property analysis of three-dimensional spacer fabric composites.

PL

Kompozyty oparte o tkaniny dystansowe 3D są nowym rodzajem struktur warstwowych, które nie tylko posiadają wysoką wytrzymałość właściwą, wysoka sztywność, małą wagę, dobrą spójność ale również posiadają świetne właściwości izolowania dźwięku i wytrzymałość termiczną co pozwala na stosowanie w specjalnych strukturach warstwowych. Wyprodukowano szereg takich kompozytów o różnej wysokości okrywy, grubości warstw, struktury okrywy w celu przedyskutowania zależności pomiędzy pochłanianiem dźwięku a właściwościami strukturalnym tych kompozytów. Kompozyty badano w specjalnych komorach. Wyniki wykazały, że kompozyty oparte na dzianinach dystansowych 3D posiadają świetne właściwości izolowania dźwięku wzrastające ze wzrostem wysokości okrywy i grubości warstw wierzchnich. Właściwości izolujące dźwięk struktur okrywy o typie‚”8’”były lepsze niż tych o strukturze ”88”. Uzyskane wyniki oferują ważne wskazówki dla optymalizacji struktur i analizy właściwości dzianin dystansowych 3D stosowanych w kompozytach.

4

Synthesis and Stab Resistance of Shear Thickening Fluid (STF) Impregnated Glass Fabric Composites

88%

Yu K. , Cao H. , Qian K. , Jiang L. , Li H.

Fibres & Textiles in Eastern Europe

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2012

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tom Vol. 20, no. 6A (95)

126--128

EN

A shear thickening fluid (STF) was prepared successfully and its rheological behavior was investigated. Glass fabrics were soaked in STF/ethanol solution to prepare STF-glass fabric composites. The morphologies of the STF-glass fabric composites were observed by SEM. Quasi-static stab-resistant tests were carried out on both the neat glass fabrics and STF-glass fabric composites using a knife based on the areal density. The corresponding puncture and strengthen mechanisms were also investigated.

PL

Przygotowano ciecz gęstniejącą pod wpływem ścinania (STF) i zbadano jej właściwości reologiczne. Tkaniny z włókien szklanych były nasycane roztworem STF/etanol dla przygotowania kompozytów. Morfologię kompozytów badano za pomocą skaningowej mikroskopii elektronowej. Prowadzono quasi-statyczne badania na przebicie na tkaninach szklanych nienasączonych oraz na opracowanych kompozytach za pomocą noża o specjalnie zaprojektowanej konstrukcji. Niezależnie od testów porównawczych badano również mechanizm przebicia.

5

Investigation of the transport of aflatoxin M1 by the transporter ABCG2 in bovine mammary epithelial cells

88%

Zhang Y. , Zhang N. , Chen D. , Huang G. , Cao H.

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tom 76

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nr 11

6

Measuring the Blend Ratio of Wool/Cashmere Yarns Based on Image Processing Technology

88%

Qian K. , Li H. , Cao H. , Yu K. , Shen W.

Fibres & Textiles in Eastern Europe

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2010

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tom Vol. 18, no. 4 (81)

35--38

EN

In this study, an image processing technique was developed for testing the blend ratio of wool/cashmere yarns. Cashmere and wool were sliced and images clearly attributed to the obvious colour divergence after staining. In the image processing procedure, a support vector machine (SVM) was used to remove the background and separate wool and cashmere fibers. Some other parameters of the SVM were selected to identify wool and cashmere fibers beyond the colour character. When the wool and cashmere fibers were completely separated, the blend ratio was calculated by means of the picture-handling and data-handling functions of MATLAB software. This research work presents an accurate and fast method of analyzing the blend ratio, and the results obtained were a confirmation of this.

PL

Artykuł przedstawia szybką technikę przetwarzania obrazu opracowaną w celu wyznaczenia udziału przędz składowych w mieszankach wełna owcza/kaszmir. Przędze składowe spleciono, wybarwiono a w celu usunięcia tła z obrazu i rozdzielenia włókien wełny owczej i kaszmiru zastosowano urządzenie typu SVM, na którym ustawiono parametry odpowiadające przędzom składowym. Po całkowitym rozdzieleniu włókien wełny owczej i kaszmiru, wyznaczono ich udział w mieszance przy zastosowaniu programu MATLAB.

7

Construction of the master sintering curve for submicron size A-Al2O3 based on non-isothermal sintering containing lower heating rates only

88%

Shao W. , Chen S. , Li D. , Cao H. , Zhang S.

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tom Vol. 27, No. 1

97--107

EN

The master sintering curve (MSC) is quite useful for analyzing the shrinkage behaviour of ceramics. In this study, the shrinkage behaviour for ?-Al2O3 with a mean particle size of 350 nm during constantheating- rate sintering were evaluated based on the MSC theory. An MSC for the above powder has been constructed using dilatometry data containing heating rates lower than 5 °C/min only with the help of combined-stage sintering model. The validity of the MSC has been verified by a few experimental runs. A comparison between predicted and experimental shrinkage curves showed good consistency, thus confirming that it is possible to control shrinkage behaviour using the MSC. The concept of the MSC has been used to evaluate the apparent activation energy for the above powder, and a high value of 1035 kJ/mol was obtained.

8

The property of lime sewage sludge and its influence on co-processing in cement kilns

75%

Cao H. , Liu J. , Xu J. , Liu W. , Huang X. , Li G.

Polish Journal of Environmental Studies

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2016

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tom 25

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nr 3

EN

In recent years, co-processing lime-dried sludge (LS) in cement kilns has attracted increasing interest in China. However, there are few published studies focused on the effect of sludge properties. In this study, LS properties and their effects on co-processing in a cement kiln were studied by performing experimental analyses and theoretical calculations. The results indicated that the heating value of municipal sewage sludge (MSS) was decreased with lime dosage. By adding 10% lime, the heating value would be almost halved to 7,198 kJ/kg. Heavy metals in LS are much lower than the limit concentration of the standard. Chlorine and sulfur are about 0.06-0.35% and 0.22-0.56%, respectively, which completely meets the relation requirement. Additionally, adding lime promotes the transformation and decomposition of ammonia and protonated amine proteins, nitrogen, and the generation of pyridine nitrogen. Theoretical calculation results show that the maximum co-processing ratio for RS is 4.5%, which can be increased by increasing the addition of a suitable amount of lime (0-16%). 10% with a 6.5% maximum co-processing ratio is suggested as the optimum lime dosage for co-combustion of LS in cement kilns.

9

Chromatographic Fingerprint Analysis and Characterization of Constituents in Shenqi Fuzheng Injection by HPLC-DAD-ELSD and UFLC-DAD-Q-TOF Tandem Mass Spectrometry Techniques

75%

Wang J. , Liu M. , Tong X. , Peng W. , Cao H. , Su W.

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tom Vol. 27, no. 3

551--569

EN

Shenqi Fuzheng Injection (SFI) is a traditional Chinese medicine injection, widely used to enhance immune function of clinical cancer patients undergoing chemotherapy. In this study, a high-performance liquid chromatography-diode array detection-evaporative light scattering detection (HPLC-DAD-ELSD) method was established for quality control of SFI, which could simultaneously semiquantitatively reflect the constituents displayed in the chromatographic profile of SFI. The relative retention time and relative peak areas of the 21 common peaks related to the reference peak were calculated. The validity and advantage of this method were validated by systematically comparing chromatograms of 10 batches of SFI samples with the analytical methods of principal component analysis and angle cosine method recommended by the State Food and Drug Administration of China. Moreover, a total of 21 constituents of SFI were identified or tentatively characterized in the fingerprint via ultrafast liquid chromatography-diode array detection-quadrupole time-of-flight (UFLC-DAD-Q-TOF) tandem mass spectrometry technique on the basis of the retention time, ultraviolet spectra, fragmentation patterns, and reported literatures. All the results proved that the technique was useful in comprehensive quality evaluation of SFI and further study.

10

EL and ITG Characterization of Large Areas Black Silicon Solar Cells VIA Screen Printing

75%

Tang Y. , Zhou C. , Wang W. , Zhou S. , Zhao Y. , Fei J. , Cao H.

Przegląd Elektrotechniczny

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2013

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tom R. 89, nr 3b

95--97

EN

A simple process of texturing silicon (Si) surfaces using gold (Au)-catalyzed wet chemical etching was used to form black Si (BS) on a (100) p-type substrate. The surface became uniformly black after 6 min, with a resulting reflectivity of < 2% over the 400 nm to 1100 nm wavelength range. Large areas (153.18 cm2) of black Si solar cells (BSSCs) with an n+-p-p+ structure were also fabricated using conventional processes, including POCl3 diffusion, screen printing, and co-firing. The resulting cells were divided into two groups according to the emitter (46 and 37 [omega]/􀀀), and their output parameters were studied. The best convention efficiency (Eff) was < 10%. The open-circuit voltage (Voc) was particularly low because of poor surface passivation, and the shunt resistance (Rsh) linearly decreased with the series resistance (Rs). Electroluminescence (EL) and infrared thermography (ITG) measurements were conducted to characterize the BSSCs. Both the emissivity and temperature were low and nonuniform. Optimizing the fabrication process by reducing the etching depth and lowering the dopant sheet resistance led to significant improvement in Voc (~48 mV) and Eff (~3.8% absolute). EL and ITG measurements indicate that Rs is another important factor that accounts for the poor properties of the BSSCs.

PL

W artykule opisano proces teksturowania powierzchni krzemowej w procesie wytrawiania chemicznego z katalizatorem w formie złota, na potrzeby produkcji czarnego krzemu (BS) na podłożu p. Zastosowane rozwiązanie m. in. optymalizacji procesu teksturowania, poprzez redukcję głębokości wytrawiania dało znaczącą poprawę napięcia Voc oraz Eff. Wykonane badania wskazują, że rezystancja szeregowa Rs stanowi ważny czynnik wpływający na działanie ogniw słonecznych, zbudowanych z czarnego krzemu.

11

Role of municipal sewage sludge in incorporating Cr, Ni, Cu, and Zn into cement clinker

75%

Liu W. , Cao H. , Xu J. , Liu J. , Huang J. , Huang X. , Li G.

Polish Journal of Environmental Studies

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2018

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tom 27

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nr 4

EN

While simultaneous processing of heavy metal-rich waste and municipal sewage sludge (MSS) in cement kilns may be a useful measure for protecting the environment, simultaneous co-disposal of these two types of wastes has seldom been reported in detail. In this study, we examined how MSS influenced the fixation of heavy metals during clinkerization and determined the main controlling mechanisms through analyzing the polymorphism of tricalcium silicate (C₃S), mineral composition of MSS, and element distribution in the clinker. The results showed that MSS had negative effects on the fixation of heavy metals, with reductions of 12.9%, 8.7%, 3.2%, and 1.2% in the amounts of Cu, Ni, Cr, and Zn fixed, respectively. These changes were mainly attributed to the presence of trace elements – in particular phosphorus from the MSS, which caused the polymorphism of C₃S to change in the order: rhombohed ral→monoclinic→triclinic. As well as occurring as C₂S-C₃P, phosphorus also occurred in new phases of K₂NiP₂O₇, K₂Cu(PO₃)₄, and Cu₄O(PO₄)₂ in cement clinker. In general, trace elements from the MSS, especially phosphorus, decreased the solubility of heavy metals in cement clinker through changing the polymorphism of C₃S, and resulting in a decrease in the fixation ratios of heavy metals.

12

Alterations in the proteome of wheat primary roots after wortmannin application during seed germination

75%

Cao H. , Ni X. , Zhang C. , Shi W. , Xu Y. , Yan Y. , Zhang F.

Acta Physiologiae Plantarum

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2017

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tom 39

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nr 10

13

Spatial distribution, risk assessment, and seasonal variations of 4-nonylphenol in China’s Yinma River Basin

75%

Sun C. , Ma R. , Xu L. , Chen L. , Xu M. , Cao H. , Zhang Z.

Polish Journal of Environmental Studies

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2019

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tom 28

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nr 2

EN

In recent decades the Yinma River Basin has been receiving increasing pollution from industrial and domestic wastewater, agriculture, and livestock production – which are all potential 4-NP pollution sources. Thus, this work investigated spatial-seasonal distribution, risks, and seasonal variations of 4-nonylphenol in the aquatic environment of the Yinma River Basin. The results indicated that the highest concentrations in water and sediment occurred in livestock-production, industrial, and domestic-wastewater areas, and the lowest occurred in agricultural areas; a seasonal variation in 4-NP concentrations in water was observed, with the highest concentrations occurring in the dry season and the lowest concentrations in the wet season. The results for risk quotient indicated that in three water seasons, low ecological risks of 4-NP in water primarily occurred in agricultural areas, and high ecological risks occurred downstream of domestic-wastewater drainage; the ecological risks of 4-NP in sediment from all the sampling sites were exposed to moderate or high ecological risks. Based on the results for hazard quotient, a seasonal variation in human health risks of 4-NP in water was observed; except for a sampling site located downstream of domestic wastewater drainage, human health risks of 4-NP in water were low

14

Laser diode array (LDA) end-pumped multi-watt Yb:YAG 1030 nm laser

63%

Cao H. , Peng H. , Zhang M. , Chen Y. , Zhang B. , Chen B. , Zhang J. , Wu T. , Zhao X. , Tan H.

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tom Vol. 40, nr 3

653--656

EN

A LDA (laser diode array) end-pumped Yb:YAG 1030 nm laser is reported. Using a plano-concave resonator, with input pump power of 11.79 W, 2.55 W TEM00 continuous wave laser at 1030 nm was obtained. The effective focal length of the thermal lens is also calculated.

15

Molecular characterization and evolutionary origins of farinin genes in Brachypodium distachyon L.

63%

Subburaj S. , Luo N. , Lu X. , Li X. , Cao H. , Hu Y. , Li J. , Yan Y.

Journal of Applied Genetics

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2016

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tom 57

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nr 3