Autor: Zhang, M.-H. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: New compensation scheme of magneto-optical current sensor for temperature stability improvement
Autorzy:: Chen, J.
Li, H.
Zhang, M.
Zhang, Y.
Powiązania:: https://bibliotekanauki.pl/articles/221874.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: magneto-optical current sensor
normalization
Verdet constant
birefringence
Opis:: A novel magneto-optical current sensor (MOCS) with two sensing arms is proposed to improve the temperature stability. One of the arms, with a highly stable permanent magnet attached and orthogonal to the other one, is designed to provide a reference that follows the temperature characteristics of the sensing material. By a normalization operation between two arms, the temperature drift is compensated adaptively and a sensing output proportional to the measured current can be reached. A dual-input and dual-output structure is specially designed for the reference sensing arm to demodulate the DC Faraday rotation angle. This scheme compensates simultaneously two main temperature influence factors, the Verdet constant and linear birefringence. Validation tests were carried out and are discussed.
Źródło:: Metrology and Measurement Systems; 2012, 19, 3; 611-616
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of positive elevation effect and prediction of vibration velocity of bench blasting vibration
Autorzy:: Zhang, X. J.
An, H. M.
Powiązania:: https://bibliotekanauki.pl/articles/1853676.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: drgania wybuchowe
efekt podniesienia pozytywny
formuła kroku
strzał
kopalnia
blasting vibration
positive elevation effect
step formula
mine
blasting
Opis:: Accurate prediction of blasting vibration should be achieved in mine blasting production practice. It is also a critical problem in the field of blasting vibration control technology research. In this research paper, on the basis of the previous research results and taking account into the reflection principle of elastic wave at the free interface, the authours proposes the blasting seismic wave propagation model. In addition, the blasting positive elevation effect are theoretically explained in detail, and the vibration velocity prediction formula of the positive elevation effect is derived. Finally, the positive elevation effect mechanism and the step (positive) formula are calibrated based on the on-site monitoring data of blasting vibration of Qipanjing Jinou coal mine. In beirf, a theoretical basis is laid by this paper for similar blasting projects.
Źródło:: Archives of Civil Engineering; 2021, 67, 1; 599-618
1230-2945
Pojawia się w:: Archives of Civil Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Usefulness of nonlinear interpolation and particle filter in Zigbee indoor positioning
Wykorzystanie nieliniowej interpolacji oraz filtru cząsteczkowego w pozycjonowaniu wewnątrz pomieszczeń przy użyciu technologii Zigbee
Autorzy:: Zhang, X.
Guo, H.
Wu, H.
Uradziński, M.
Powiązania:: https://bibliotekanauki.pl/articles/145368.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: technologia ZigBee
kalibracja obszaru lokalizacji
algorytm pozycjonowania
fingerprint positioning algorithm
RSSI
ZigBee sensor networks
polynomial interpolation
particle filter
Opis:: The key to fingerprint positioning algorithm is establishing effective fingerprint information database based on different reference nodes of received signal strength indicator (RSSI). Traditional method is to set the location area calibration multiple information sampling points, and collection of a large number sample data what is very time consuming. With Zigbee sensor networks as platform, considering the influence of positioning signal interference, we proposed an improved algorithm of getting virtual database based on polynomial interpolation, while the pre-estimated result was disposed by particle filter. Experimental result shows that this method can generate a quick, simple fine-grained localization information database, and improve the positioning accuracy at the same time.
Kluczem do algorytmu pozycjonowania wykorzystującego metodę fingerprinting jest ustanowienie skutecznej bazy danych na podstawie informacji z radiowych nadajników referencyjnych przy wykorzystaniu wskaźnika mocy odbieranego sygnału (RSSI). Tradycyjna metoda oparta jest na przeprowadzeniu kalibracji obszaru lokalizacji na podstawie wielu punktów pomiarowych i otrzymaniu dużej liczby próbek, co jest bardzo czasochłonne.
Źródło:: Geodesy and Cartography; 2014, 63, 2; 219-233
2080-6736
2300-2581
Pojawia się w:: Geodesy and Cartography
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A fault diagnosis method for substation grounding grid based on the square-wave frequency domain model
Autorzy:: Zhang, P.-H.
He, J.-J.
Zhang, D.-D.
Wu, L.-M.
Powiązania:: https://bibliotekanauki.pl/articles/221635.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: square-wave
frequency characteristics
grounding grid
fault diagnosis
Opis:: Current methods of fault diagnosis for the grounding grid using DC or AC are limited in accuracy and cannot be used to identify the locations of the faults. In this study, a new method of fault diagnosis for substation grounding grids is proposed using a square-wave. A frequency model of the grounding system is constructed by analyzing the frequency characteristics of the soil and the grounding conductors into which two different frequency square-wave sources are injected. By analyzing and comparing the corresponding information of the surface potentials of the output signals, the faults of the grounding grid can be diagnosed and located. Our method is verified by software simulation, scale model experiments and field experiments.
Źródło:: Metrology and Measurement Systems; 2012, 19, 1; 63-71
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Speech Enhancement Based on the Multi-Scales and Multi-Thresholds of the Auditory Perception Wavelet Transform
Autorzy:: Tao, Z.
Zhao, H. M.
Zhang, X-J.
Wu, D.
Powiązania:: https://bibliotekanauki.pl/articles/177021.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: speech enhancement
low SNR
auditory perception wavelet transform
unvoiced enhancement
masking effect
Opis:: This paper proposes a speech enhancement method using the multi-scales and multi-thresholds of the auditory perception wavelet transform, which is suitable for a low SNR (signal to noise ratio) environment. This method achieves the goal of noise reduction according to the threshold processing of the human ear’s auditory masking effect on the auditory perception wavelet transform parameters of a speech signal. At the same time, in order to prevent high frequency loss during the process of noise suppression, we first make a voicing decision based on the speech signals. Afterwards, we process the unvoiced sound segment and the voiced sound segment according to the different thresholds and different judgments. Lastly, we perform objective and subjective tests on the enhanced speech. The results show that, compared to other spectral subtractions, our method keeps the components of unvoiced sound intact, while it suppresses the residual noise and the background noise. Thus, the enhanced speech has better clarity and intelligibility.
Źródło:: Archives of Acoustics; 2011, 36, 3; 519-532
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Reconstruction algorithm for obtaining the bending deformation of the base of heavy-duty machine tool using inverse Finite Element Method
Autorzy:: Liu, M.
Zhang, X.
Song, H.
Wang, J.
Zhou, S.
Powiązania:: https://bibliotekanauki.pl/articles/221566.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: inverse Finite Element Method
bending deformation
heavy-duty machine tool
reconstruction algorithm
statically indeterminate structure
Opis:: The field of mechanical manufacturing is becoming more and more demanding on machining accuracy. It is essential to monitor and compensate the deformation of structural parts of a heavy-duty machine tool. The deformation of the base of a heavy-duty machine tool is an important factor that affects machining accuracy. The base is statically indeterminate and complex in load. It is difficult to reconstruct deformation by traditional methods. A reconstruction algorithm for determining bending deformation of the base of a heavy-duty machine tool using inverse Finite Element Method (iFEM) is presented. The base is equivalent to a multi-span beam which is divided into beam elements with support points as nodes. The deflection polynomial order of each element is analysed. According to the boundary conditions, the deformation compatibility conditions and the strain data measured by Fiber Bragg Grating (FBG), the deflection polynomial coefficients of a beam element are determined. Using the coordinate transformation, the deflection equation of the base is obtained. Both numerical verification and experiment were carried out. The deflection obtained by the reconstruction algorithm using iFEM and the actual deflection measured by laser displacement sensors were compared. The accuracy of the reconstruction algorithm is verified.
Źródło:: Metrology and Measurement Systems; 2018, 25, 4; 727-741
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Establishment of 5-Fluorouracil-resistant canine mammary tumor cell line
Autorzy:: Zhou, B.
Zhang, D.
Pei, S.M.
Zhang, K.
Du, H.C.
Jin, Y.P.
Lin, D.G.
Powiązania:: https://bibliotekanauki.pl/articles/30283.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: Canine mammary tumors are the most common neoplasms in intact female dogs. The surgery cannot always solve the problem, chemotherapy are recommend to these patients. However, chemotherapy could always fail because of multidrug resistance (MDR). Through stepwise increasing 5-Fluorouracil (5-FU) concentration in the culture medium, a 5-FU-resistant canine mammary tumor cell line CMT7364/5-FU was established to disclose the molecular mechanism of the drug resistance. Cell morphology, cell sensitivity to drugs, growth curves, expression of proteins, and chemo-sensitivity in vivo were compared between the parental cell line and resistant cell line. As compared it to its parental cell line (CMT7364), CMT7364/5-FU showed different morphology, cross-resistant to other chemo-drugs and a prolonged population doubling time (PDT). The drug efflux pump proteins (ABCB1 and ABCG2) in CMT7364/5-FU were up-regulated. In vivo, the similar result revealed that CMT7364/5-FU cell line was more resistant to 5-FU. In conclusion, a 5-FU-resistant canine mammary tumor cell line (CMT7364/5-FU) was successfully established, it can serve as a good model for researching the mechanism of MDR and screening effective agents to reverse drug resistance.
Źródło:: Polish Journal of Veterinary Sciences; 2017, 20, 1
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: A novel fibre Bragg grating curvature sensor for structure deformation monitoring
Autorzy:: Liu, M.-Y.
Zhou, S.-G.
Song, H.
Zhou, W.-J.
Zhang, X.
Powiązania:: https://bibliotekanauki.pl/articles/221816.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: fibre Bragg grating
curvature sensor
large structure parts
deformation monitoring
Opis:: Real-time monitoring of deformation of large structure parts is of great significance and the deformation of such structure parts is often accompanied with the change of curvature. The curvature can be obtained by measuring changes of strain, surface curve and modal displacement of the structure. However, many factors are faced with difficulty in measurement and low sensitivity at a small deformation level. In order to measure curvature in an effective way, a novel fibre Bragg grating (FBG) curvature sensor is proposed, which aims at removing the deficiencies of traditional methods in low precision and narrow adjusting. The sensor combines two FBGs with a specific structure of stainless steel elastomer. The elastomer can transfer the strain of the structure part to the FBG and then the FBG measures the strain to obtain the curvature. The performed simulation and experiment show that the sensor can effectively amplify the strain to the FBG through the unique structure of the elastomer, and the accuracy of the sensor used in the experiment is increased by 14% compared with that of the FBG used for direct measurement.
Źródło:: Metrology and Measurement Systems; 2018, 25, 3; 577-587
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Bacterial communities in PM2.5 and PM10 in broiler houses at different broiler growth stages in spring
Autorzy:: Zhang, J.
Li, Y.
Xu, E.
Jiang, L.
Tang, J.
Li, M.
Zhao, X.
Chen, G.
Zhu, H.
Yu, X.
Zhang, X.
Powiązania:: https://bibliotekanauki.pl/articles/2087465.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: bacterial communities
broilers
high-throughput sequencing
particulate matter
Źródło:: Polish Journal of Veterinary Sciences; 2019, 3; 495-504
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Molecular cloning, expression, purification and osteoblasts proliferation activity of sika deer thymosin beta10
Autorzy:: Zhao, D.
Zhao, Y.
Zhang, H.
Xu, Z.
Liu, M.
Wang, J.
Bai, X.
Powiązania:: https://bibliotekanauki.pl/articles/2087874.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: affinity chromatography
cell proliferation
prokaryotic expression
sika deer
thymosin 10
Źródło:: Polish Journal of Veterinary Sciences; 2017, 4; 751-758
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Measurement of the Indentation Modulus and the Local Internal Friction in Amorphous SiO2 Using Atomic Force Acoustic Microscopy
Autorzy:: Zhang, B.
Wagner, H.
Büchsenschütz-Göbeler, M.
Luo, Y.
Küchemann, S.
Arnold, W.
Samwer, K.
Powiązania:: https://bibliotekanauki.pl/articles/352901.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: amorphous materials
potential energy landscape
internal friction
atomic force acoustic microscopy
Opis:: For the past two decades, atomic force acoustic microscopy (AFAM), an advanced scanning probe microscopy technique, has played a promising role in materials characterization with a good lateral resolution at micro/nano dimensions. AFAM is based on inducing out-of-plane vibrations in the specimen, which are generated by an ultrasonic transducer. The vibrations are sensed by the AFM cantilever when its tip is in contact with the material under test. From the cantilver’s contactresonance spectra, one determines the real and the imaginary part of the contact stiffness k*, and then from these two quantities the local indentation modulus M' and the local damping factor Q_loc^-1 can be obtained with a spatial resolution of less than 10 nm. Here, we present measured data of M' and of Q_loc^-1 for the insulating amorphous material, a-SiO₂. The amorphous SiO₂ layer was prepared on a crystalline Si wafer by means of thermal oxidation. There is a spatial distribution of the indentation modulus M' and of the internal friction Q_loc^-1. This is a consequence of the potential energy landscape for amorphous materials.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 1; 9-12
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Molecular characterization and expression patterns of ghrelin in the reindeer (Rangifer tarandus)
Autorzy:: Zhang, M.
Xu, X.
Zhu, X.
Jin, X.
Bao, H.
Dugeer, S.
Du, C.
Cao, G.
Yang, Y.
Powiązania:: https://bibliotekanauki.pl/articles/2087780.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ghrelin
reindeer (Rangifer tarandus)
cDNA cloning
structural characterization
tissue expression
Źródło:: Polish Journal of Veterinary Sciences; 2018, 21, 1; 55-64
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Development of a SYBR Green I real-time PCR assay for detection of novel porcine parvovirus 7
Autorzy:: Li, Y.D.
Yu, Z.D.
Bai, C.X.
Zhang, D.
Sun, P.
Peng, M.L
Liu, H.
Wang, J.
Wang, Y.
Powiązania:: https://bibliotekanauki.pl/articles/2087207.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Capsid gene
PPV7
SYBR Green I real-time PCR
Źródło:: Polish Journal of Veterinary Sciences; 2021, 24, 1; 43-49
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki