Autor: Yang, Feng - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Numerical Investigation of the Propagation Characteristics of Surface Transverse Wave Considering Various Quartz Substrate and Electrode Configurations
Autorzy:: Jiang, Chao
Cao, Xiaoli
Yang, Feng
Liu, Zejun
Tematy:: surface transverse wave
STW
interdigital transducer
IDT
finite element analysis
FEA
quartz; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/31339822.pdf Link otwiera się w nowym oknie
Opis:: Featured with a higher velocity, increased power handling capability, and better aging behavior, surface transverse wave (STW) shows more promising prospects than Rayleigh wave nowadays in various sensing applications. The need to design, optimize, and fabricate the related devices motivates the development of modeling and simulation. For this reason, a three-dimensional (3D) finite element (FE) simulation of STW on quartz, considering the crystal cut angle and the electrode effects, is presented in this study. Firstly, we investigated the effects of quartz’s cut angle on the generated waves. Here, the polarized displacements were analyzed to distinguish the wave modes. Secondly, the investigations of the electrode effects on the polarized displacement, phase velocity, and electromechanical coupling factor (K²) were carried out, for which different material and thickness configurations for the electrodes were considered. Thirdly, to examine the excitation conditions of the generated waves, the admittance responses were inspected. The results showed that not only the crystal cut angle but also the density and the acoustic impedance of the interdigital transducer (IDT) material have a strong influence on the excited waves. This article is the first to analyze STWs considering quartz’s cut angle and electrode effect through a 3D FE model. It could provide a helpful and easy way to design, optimize, and fabricate the related surface acoustic wave devices.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Drying Kinetics, Physicochemical Properties and Sensory Quality of the Instant Foxtail Millet as Affected by Drying Methods
Autorzy:: Wang, Yingqiang
Zhao, Hongxia
Song, Xi
Zhang, Wenjie
Yang, Feng
Tematy:: instant foxtail millet
drying kinetics
physicochemical properties
sensory quality; Pokaż więcej
Wydawca:: Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Powiązania:: https://bibliotekanauki.pl/articles/2019405.pdf Link otwiera się w nowym oknie
Opis:: The instant foxtail millet was prepared using microwave vacuum drying (MVD), microwave-hot air drying (MHAD), hot air drying (HAD) and traditional roasting (TR). Their effects on drying kinetics, physicochemical properties as well as sensory quality were evaluated and compared. Results showed that the total drying time varied with the drying method used and was about 160, 100, 260, and 45 min for MVD, MHAD, HAD and TR, respectively. The effective moisture diffusion coefficients (Deff) were 6.57×10-9 m2/s, 9.80×10-9 m2/s, 4.14×10-9 m2/s and 6.20×10-9 m2/s for MVD, MHAD, HAD and TR, respectively. Drying resulted in a significant decrease in L* and an increase in a* and b* of the color of products. MVD, MHAD and HAD products had a comparable rehydration ratio and cooking time. Scanning electron microscopy and rehydration process revealed that MHAD and MVD samples had a similar structure with the HAD sample. Drying caused a loss of 6.5–54.9% in the total phenolic content and a loss of 38.4–62.2% in total yellow pigment content. MVD millet displayed the highest total phenolic content (142.56 mg GAE/100 g dry matter) and yellow pigment content (9.56 mg CE/kg dry matter). In sensory evaluation, MHAD, HAD and MVD samples had comparable scores and were all accepted by the panelists, either in dry or rehydrated form. MHAD and MVD can be used as an alternative to hot air drying or traditional roasting in the production of the instant millet due to shorter drying time and better product quality.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Study on flotation behavior and mechanism of separating chalcopyrite and Molybdenite with ethyl mercaptoglycolate as inhibitor
Autorzy:: Yang, Xiao-Feng
Xu-Zhao
Liu, Yao-Yao
Tematy:: ethyl thioglycolate
chalcopyrite
molybdenite
inhibitor
separation; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/24085868.pdf Link otwiera się w nowym oknie
Opis:: The effect of ethyl thioglycolate organic small molecule inhibitors on chalcopyrite molybdenite flotation behaviour is investigated via single mineral micro-flotation tests, zeta potential tests, and X-ray photoelectron spectroscopy (XPS) analysis. Results of the flotation test indicate that ethyl thioglycolate organic small-molecule inhibitors can effectively separate Cu and Mo and selectively inhibit chalcopyrite under weak alkaline conditions. Infrared spectroscopy and XPS analysis show that hydrophilic functional groups C=O and -COOH in the ethyl thioglycolate organic small molecules can chemically adsorb onto the chalcopyrite surface. Moreover, ethyl thioglycolate has no obvious effect on zeta potential of molybdenite. Therefore, ethyl thioglycolate can effectively separate chalcopyrite and molybdenite.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Computed tomography-guided catheter drainage with ozone in management of pyogenic liver abscess tomography-guided catheter drainage with ozone in management of pyogenic liver abscess
Autorzy:: Du, Yong
Zhang, Chuan
Li, Bing
Yang, Han-Feng
Xu, Xiao-Xue
Li, Yang
Liu, Chuan
Wang, Lang
Opis:: Purpose: To compare the treatment efficacy of percutaneous catheter drainage alone to catheter drainage combined with ozone in the management of pyogenic liver abscess (PLA). Material and methods: This prospective study included 85 patients diagnosed with PLA. All patients were randomly divided into two groups: catheter drainage alone (Group I); catheter drainage combined with ozone (Group II). Drainage was considered successful when: 1) the abscess cavities were completely drained, and 2) clinical symptoms were resolved. Kruskall-Wallis nonparametric test was used to compare the success rates, length of stay (LOS), and need of further surgery. A value of p < 0.05 was considered significant for all statistical analyses. Results: In all the patients’ percutaneous catheters were placed successfully under the guidance of computed tomography. All of the patients in Group I (43; 50.6%) were treated with percutaneous catheter drainage alone, while the patients in Group II (42; 49.4%) were treated with PCD combined with ozone. The success rates of Group I and II were 81% and 94%, respectively (p < 0.05). The duration of fever as well as LOS was longer for Group I when compared with Group II (p <0.05). Conclusions: Catheter drainage combined with ozone is an effective and safe treatment in PLA.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 5.

Tytuł:: A systematic review and meta-analysis of C-Arm Cone-Beam CT-guided percutaneous transthoracic needle biopsy of lung nodules
Autorzy:: Du, Yong
Zhang, Chuan
Yan, Gao-Wu
Yan, Gao-Wen
Li, Bin-Zhong
Li, Bing
Yang, Han-Feng
Sun, Qin-Quan
Xu, Xiao-Xue
Zhou, Yu
Bhetuwal, Anup
Zeng, Hao
Niu, Xiang-Ke
Li, Li-Fa
Opis:: BACKGROUND: A systematic review and meta-analysis of all available publications was performed to evaluate the diagnostic accuracy of percutaneous transthoracic needle biopsy (PTNB) using a C-Arm Cone-Beam CT (CBCT) system in patients with lung nodules. MATERIAL AND METHODS: Thedatabases of PUBMED, OVID, EBSCO, EMBASE, and China National Knowledge Infrastructure (CNKI) were systematically searched for relevant original articles on the diagnostic accuracy of CBCT-guided PTNB for the diagnosis of nodules in the lungs. Diagnostic indices including sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic odds ratio (DOR) and diagnostic score (DS) were calculated. Moreover,summary receiver operating characteristic curves (SROC) were constructed with Stata (version 13.0), Rev Man (version 5.3), and Meta-disc (version 1.4) software. Other clinical indices such as incidence of complications were also recorded. RESULTS: Eight studies met the inclusion and exclusion criteria for the meta-analysis. The pooled sensitivity, specificity, PLR, NLR, DOR, DS, and SROC with 95% confidence intervals were 0.96 (0.93-0.98), 1.00 (0.91-1.00), 711.15 (9.48-53325.89), 0.04 (0.02-0.07), 16585.29 (284.88-9.7e+05), 9.72 (5.65-13.78), and 0.99 (0.97-0.99), respectively. The incidence of pneumothorax and hemorrhage was 10-29.27% and 1.22-47.25%, respectively. CONCLUSIONS: CBCT-guided PTNBhas an acceptable rate of complications and is associated with a reasonable radiation exposure. Moreover, it is a highly accurate and safe technique for the diagnosis of lung nodules and can be recommended to be used in routine clinical practice.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: Upgrading the evidence for the use of ambroxol in Gaucher disease and GBA related Parkinson : Investigator initiated registry based on real life data
Autorzy:: Castillo-Garcia, Daniela
Zimran, Ari
Becker-Cohen, Michal
Rodic, Predrag
Kieć-Wilk, Beata
Ramaswami, Uma
Chan, Alicia
Stefanova Tincheva, Radka
Istaiti, Majdolen
Dinur, Tama
Al-Hertani, Walla
Lee, Beom Hee
Yang, Chia-Feng
Fiumara, Agata
Rubio, Barbara
Ceron-Rodriguez, Magdalena
Revel-Vilk, Shoshana
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 7.

Tytuł:: High Efficiency Covering Technology for Covered Yarn Production: Controlling the Spandex Yarn Draw Ratio
Wysokowydajna technologia produkcji przędzy oplatanej z zastosowaniem kontroli współczynnika rozciągania przędzy spandexowej
Autorzy:: Feng, Pei
Liu, Dashuang
Yang, Chongchang
Tematy:: tension controlled
elastic fibre
draw ratio
spandex covered yarns
naprężenie kontrolowane
włókno elastyczne
współczynnik rozciągania
przędza pokryta spandeksem; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/233862.pdf Link otwiera się w nowym oknie
Opis:: This paper proposes a new covered yarn system in which the tension of spandex elastic yarn drawing is controlled. By analysing the relationship between the draw ratio and yarn tension, it was verified that the new tension controlled drawing system is feasible and results in yarns of superior quality and process stability.
W pracy zaproponowano nowy system wytwarzania przędzy oplatanej, w którym kontrolowane jest naprężenie rozciągania przędzy elastycznej spandex. Analizując zależność między współczynnikiem rozciągania a naprężeniem przędzy, zweryfikowano, że zaproponowany system ciągnienia z kontrolowanym naprężeniem jest wykonalny i zapewnia wytworzenie przędzy o najwyższej jakości z zachowaniem stabilności procesu.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Effects on the Stability of the Balloon Shape in the Covered Yarn Process
Parametry wpływające na trwałość kształtu balonu w procesie przędzenia z owijaniem
Autorzy:: Feng, P.
Zhang, R.
Yang, C.
Tematy:: balloon shape
covered yarn
numerical simulation
parameters
kształt balonu
model matematyczny balonu
przędza poliamidowa
symulacja numeryczna; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/234274.pdf Link otwiera się w nowym oknie
Opis:: In the process of producing covered yarn, a single outer wrapping yarn forms a balloon when it rotates at high speed. In this work, we used a mathematical model of a balloon formed by polyamide, which is a common outer wrapping yarn, and verified its feasibility with a group of experimental data. The effects of yarn tension, rotation speed, balloon height and turntable radius on the balloon shape were analysed and the correctness simultaneously demonstrated.
W procesie przędzenia z owijaniem, przędza owijająca obracając się z dużą prędkością tworzy balon. W pracy wykorzystano model matematyczny balonu utworzonego z poliamidowej przędzy owijającej i zweryfikowano jego wykonalność z grupą danych eksperymentalnych. Analizowano wpływ naprężeń przędzy, prędkości obrotowej, wysokości balonu i promienia stołu obrotowego na kształt balonu. Przedstawione wyniki mogą być podstawą do wyboru odpowiednich parametrów i uzyskania optymalnego kształtu balonu.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Distribution of the Polymer Melt Velocity and Temperature in the Spinneret Channel of Bi-component Fibre Melt Spinning: a Mathematical Model
Autorzy:: Feng, Pei
Liu, Dashuang
Zhang, Ronggen
Yang, Chongchang
Tematy:: composite fibre
spinning assembly
velocity field distribution
mathematical model; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/2056290.pdf Link otwiera się w nowym oknie
Opis:: For the stability of composite fibre spinning, the difference in and distribution of the polymer melt velocity during the spinning are among the factors of importance. Based on the basic equation for the control of composite spinning dynamics, boundary conditions are identified and reported in this paper. A mathematical model for the symmetric and asymmetric distribution of the melt flow velocity in the microhole of the spinneret of the composite spinning assembly was developed. The accuracy of the mathematical model was also ascertained. It gives a theoretical basis for the designing of a composite spinning assembly.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: High Efficiency Covering Technology for Covered Yarns Production: Equipment and Experimente
Wysokowydajna technologia przędzenia z owijaniem
Autorzy:: Feng, P.
Zhang, R.
Gan, J.
Yang, C.
Tematy:: high efficiency
covering technology
covered yarn
rotation speed
low cost
proces teksturowania
przędza poliamidowa
przędzenie z owijaniem
cechy strukturalne przędzy; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/233138.pdf Link otwiera się w nowym oknie
Opis:: A new covering technology for producing covered yarns is proposed in this article. On a traditional yarn covering machine, a hollow spindle rotates with a bobbin of the outer wrapping yarn. In the new equipment, the turntable rotates with only one single outer wrapping yarn. With a magnetic device, the bobbin of core yarns is suspended in a balloon formed by outer wrapping yarns. The rotation speed of the turntable can reach 40000 rpm. A series of experiments on the new equipment were conducted and some covered yarn samples were obtained. The performance of these samples were tested and compared with that produced by traditional machines.
W artykule zaproponowano nową technologię przędzenia z owijaniem. W eksperymentach zastosowano 5 prędkości obrotowych: 12.000, 20.000, 27.000, 32.000 and 35.000 r.p.m. Przy użyciu mikroskopu porównano otrzymane przędze z przędzami otrzymanymi metodą tradycyjną. Stwierdzono, że tradycyjna przędza była bardziej puszysta, a przędza otrzymana nową metodą charakteryzowała się dobrą równomiernością. Po porównaniu dwóch rodzajów przędz stwierdzono, że równomierność skrętu przędzy uzyskanej nową metodą jest wyższa, ponieważ w nowym sposobie przędzenia zastosowano synchroniczny napęd taśmy, co skutkuje mniejszymi wahaniami prędkości obrotowej.
Dostawca treści:: Biblioteka Nauki

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