Autor: Zhao, Jun - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Experimental study of a new type of high-strength monolithic square-section concrete columns with spiral stirrups
Autorzy:: Xianchao, Zheng
Liyun, Fan
Zhao, Jun
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/27764924.pdf Link otwiera się w nowym oknie
Opis:: In this paper, four full-scale concrete columns with high-strength spiral stirrups (HSSS) are constructed and tested under low-cycle repeated loading. The specimens consisted of two cast-in-place columns and two precast concrete columns encased by a partly square steel pipe and bolt bars.The structural analysis of the HSSS columns of precast concrete conducted here is novel, and past experimental data for this are not available.To assess the seismic behavior and failure mechanisms of the new connections, quasi-static tests were carried out on columns prefabricated with them and cast-in-place specimens.The responses of all columns were compared, and the results showed that the failure modes of all columns are the large eccentric damage, and the destruction of all specimens occur at the column foot. The anti-seismic property of the precast HSSS concrete columns was comparable to that of the HSSS cast-in-place columns. A comparison of such performance parameters as energy dissipation and coefficient of ductility revealed that the precast HSSS concrete columns are suitable for use in earthquake zones.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Pointwise approximation by Meyer-König and Zeller operators
Autorzy:: Zeng, Xiao-Ming
Zhao, Jun-Ning
Tematy:: asymptotically optimal
rate of convergence
basis functions and moments of approximation operators; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Powiązania:: https://bibliotekanauki.pl/articles/1208026.pdf Link otwiera się w nowym oknie
Opis:: We study the rate of pointwise convergence of Meyer-König and Zeller operators for bounded functions, and get an asymptotically optimal estimate.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fungal diversity notes 2017-2122 : taxonomic and phylogenetic contributions to freshwater fungi and other fungal taxa
Autorzy:: Bandini, Ditte
Usman, Muhammad
Xiao, Yuanpin
Porcu, Giuseppe
Abeywickrama, Pranami D.
Liu, Jian-Wei
Armand, Alireza
Danteswari, Chalasani
Subramani, Priyadarshini
Casula, Marco
Zhang, Huang
Chen, Li-Jia
Dai, Dong-Qin
Liang, Yu-Shan
Zhao, Hai-Jun
Miller, Steven L.
Dissanayake, Asha J.
Rinaldi, Andrea C.
Wu, Na
Kumar, Shambhu
Martín, María P.
Svantesson, Sten
Kumla, Jaturong
Abdollahzadeh, Jafar
Tennakoon, Danushka S.
Yang, Chun-Lin
Kiss, Levente
Piri Kakihai, Sodabeh
Condé, Thiago O.
Suwannarach, Nakarin
Leonardi, Marco
Cheng, Song-Qi
Kezo, Kezhocuyi
Yu, Fu-Qiang
Shivas, Roger G.
Wang, Fei-Hu
Kabdraisova, Aisulu
Ronikier, Anna
Henkel, Terry W.
Khalid, Abdul Nasir
Yang, Yan-Yan
Gafforov, Yusufjon
Gao, Ying
de Silva, Nimali I.
Mleczko, Piotr
Du, Tian-Ye
Oset, Magdalena
Hyde, Kevin D.
Wen, Ting-Chi
Karunarathna, Samantha C.
Zhang, Jing-Yi
Ren, Guang-Cong
Ma, Jian
Gomdola, Deecksha
Ossowska, Emilia Anna
Yang, Yunhui
Suduri, Leila
Mahadevakumar, Shivannegowda
Mua, Alberto
Mohammadi Hamidi, Leila
Manawasinghe, Ishara Sandeepani
Ronikier, Michał
Li, Yan-Xia
Ferreira, Renato Juciano
Abdel-Wahab, Mohamed A.
Hernandez-Monroy, Abril
Podile, Appa Rao
Liao, Chun-Fang
Aime, M. Catherine
Rossi, Walter
Hashemlou, Esmaeil
Javan-Nikkhah, Mohammad
Lu, Yong-Zhong
Ghosta, Youbert
Jeewon, Rajesh
Gasca-Pineda, Jaime
Senanayake, Indunil Chinthani
Maharachchikumbura, Sajeewa S. N.
Rutkowski, Ryszard
Baseia, Iuri Goulart
Lumyong, Saisamorn
Bundhun, Digvijayini
Liu, Feng
Tian, Xing-Guo
Senwanna, Chanokned
Vaghefi, Niloofar
Gui, Heng
Sun, Ya-Ru
Wei, De-Ping
Chellapan, Naveenkumar
Bashiri, Samaneh
Xu, Rong-Ju
Karpowicz, Filip
Piepenbring, Meike
Chandranayaka, Siddaiah
Kunca, Vladimir
Kukwa, Martin
Han, Li-Su
Shu, Yong-Xin
Chen, Yanpeng
Chaiwan, Napalai
Acharya, Krishnendu
He, Shu-Cheng
Arumugam, Elangovan
de Farias, Antonio Roberto Gomes
Jayawardena, Ruvishika S.
Tan, Yu Pei
Pereira, Olinto L.
Zhao, Qi
Rajwar, Soumyadeep
Leão, Ana F.
Tarafder, Entaj
Velez, Patricia
Murugadoss, Ramesh
Tibpromma, Saowaluck
Sarma, Pullabhotla V. S. R. N.
Sanna, Massimo
Ahmadpour, Abdollah
Kaygusuz, Oğuzhan
Custódio, Fábio A.
Doilom, Mingkwan
Calabon, Mark S.
Singh, Raghvendra
Afshari, Naghmeh
Kosecka, Magdalena
Luo, Zong-Long
Shen, Hong-Wei
Glejdura, Stanislav
Kaliyaperumal, Malarvizhi
Dong, Wei
Vasan, Vigneshwari
Guzow-Krzemińska, Beata
Yang, Yu
Li, Hua
Amirashayeri, Pezhman
Chen, Liu-Huan
Monkai, Jutamart
Tang, Xia
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 4.

Tytuł:: Analytical study on dynamic response of cantilever flexible retaining wall
Autorzy:: Yang, Xiuzhu
Liu, Xinyuan
Zhao, Shuang
Yu, Jun
Tematy:: analiza sejsmiczna
ścianka wspornikowa
ściana elastyczna
ściana oporowa
mechanika falowa
odpowiedź dynamiczna
rozwiązanie analityczne
seismic analysis
cantilever wall
flexible wall
retaining wall
wave mechanics
dynamic response
analytic solution; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/27312122.pdf Link otwiera się w nowym oknie
Opis:: Based on wave mechanics theory, the dynamic response characteristics of cantilever flexible wall in two-dimensional site are analyzed. The partial derivative of the vibration equation of soil layer is obtained, and the general solution of the volume strain is obtained by the separation of variables method. The obtained solution is substituted back to the soil layer vibration equation to obtain the displacement vibration general solution. Combined with the soil-wall boundary condition and the orthogonality of the trigonometric function, the definite solution of the vibration equation is obtained. The correctness of the solution is verified by comparing the obtained solution with the existing simplified solution and the solution of rigid retaining wall, and the applicable conditions of each simplified solution are pointed out. Through parameter analysis, it is shown that when the excitation frequency is low, the earth pressure on the wall is greatly affected by the soil near the wall. When the excitation frequency is high, the influence of the far-field soil on the earth pressure of the wall gradually increases. The relative stiffness of the wall, the excitation frequency and the soil layer damping factor have a significant effect on the dynamic response of the flexible retaining wall.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Modelling and optimisation of vacuum collection system for cruise ship kitchen garbage
Autorzy:: Du, Jun
Li, Ruonan
Wu, Xin
Zhao, Hang
Tematy:: kitchen waste vacuum collection
System modeling
Sorting algorithm
Model experiment; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/259756.pdf Link otwiera się w nowym oknie
Opis:: Pollution of the marine environment by ship garbage is an urgent problem to be solved at home and abroad. The ship kitchen garbage vacuum collection system is a new environmental protection scheme for garbage disposal. It has many advantages, such as using a pipeline instead of manual operation, creating high-level sanitary conditions, realising completely closed garbage collection and transportation, eliminating cross-pollution, saving space and so on. In this paper, the system is modelled, and the calculation of pipeline pressure loss, the vacuum degree of the vacuum tank and the energy consumption of the system are briefly introduced. In order to reduce the energy consumption, an algorithm for the emptying and discharging port is presented. In order to solve the problem of optimising relevant parameters, the vacuum transport mechanism of garbage is studied based on an optimisation model of the pipe network, and the experimental platform of a simulation device is set up. In engineering, this is of great significance to the design of cruise ship garbage collection and treatment systems and the development of supporting technology.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Dynamic response analysis of light weight pyramidal sandwich plates subjected to water impact
Autorzy:: Wang, Hao
Zhao,, Fei
Liu, Jun
Tian, Yuan
Tematy:: light weight pyramidal sandwich plate structures (LWPSPS)
multi-physics numerical model
maximum deformation
quasi-static
local air cushion
Yuan-Sheng Cheng; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/259878.pdf Link otwiera się w nowym oknie
Opis:: The fluid-solid interaction (FSI) dynamic responses for a Light Weight Pyramidal Sandwich Plate Structure (LWPSPS) under different water-entry velocities (1m/s-6m/s) are investigated numerically and theoretically. The characteristics of impact pressure and structure deformation are obtained by using LS-DYNA code based on the proposed 3D multi-physics (air-water-solid) FEM model. Numerical results show that the average water impact pressure of LWPSPS is much lower than that of the monolithic plate with same mass. Moreover, a phenomenon called “local air cushion” is observed for LWPSPS which does not exist for a monolithic plate. Theoretical hydroelasticity analysis demonstrates that the FSI effect of LWPSPS is weak when the ratio of water impact duration time to wet natural vibration period is greater than 4. In the study, an engineering estimation method to predict the maximum deformation of the LWPSPS is proposed, in which the total deformation is divided into two parts, i.e. local field deformation and global field deformation, and they are both computed using analytical model. Good agreement between the numerical results and ones obtained from the proposed engineering estimation method is achieved. Furthermore, the geometric variation sensitiveness analysis is also conducted.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: A modified Fourier-Ritz method for free vibration of rectangular plates with elastic constrains
Autorzy:: Wu, Tao
Chen, Zhao Bo
Qu, Jian Jun
Tematy:: modified Fourier-Ritz method
rectangular plate
free vibration
boundary conditions; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/2086961.pdf Link otwiera się w nowym oknie
Opis:: In this paper, a modified Fourier-Ritz method is used to study free vibration of a rectangular plate with a set of simply supported opposite sides and another set of arbitrary elastic constraints. The influence of different elastic constraint stiffness values on the modal response of the rectangular plate is also analyzed. In order to avoid that the displacement function of the rectangular plate calculated by the traditional method and its derivative may be discontinuous or non-derivable at the boundary, the displacement function is expressed in the form of the sum of standard cosine series and a periodic polynomial function. Compared with the sine series expansion, the convergence of the result is enhanced. Several sets of numerical examples with different boundary conditions are given in the article, the data shows that the results calculated by this method have good accuracy and fast convergence. In addition, this paper also analyzes the boundary conditions and discusses the influence of different spring stiffness values on the setting of boundary conditions. The results can be applied to the setting of general boundary conditions and the study of vibration control of rectangular plates.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Thermal and mechanical properties of poly(L-lactic acid) nucleated with N,N’-bis(phenyl) 1,4-naphthalenedicarboxylic acid dihydrazide
Właściwości termiczne i mechaniczne poli(kwasu L-mlekowego) zarodkowanego dihydrazydem kwasu N,N’-bis(fenylo) 1,4-naftalenodikarboksylowego
Autorzy:: Zhao, Li-Sha
Qiao, Jun
Chen, Wei
Cai, Yan-Hua
Tematy:: poly(L-lactic acid)
phenyl hydrazine
nucleation effect
non-isothermal crystallization
mechanical properties
poli(kwas L-mlekowy)
fenylohydrazyna
efekt zarodkowania
krystalizacja nieizotermiczna
właściwości mechaniczne; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Powiązania:: https://bibliotekanauki.pl/articles/1789985.pdf Link otwiera się w nowym oknie
Opis:: The modified poly(L-lactic acid) (PLLA) with different contents (0.5−3 wt %) of N,N’-bis(phenyl) 1,4-naphthalenedicarboxylic acid dihydrazide (NAPH) were prepared to evaluate effects of NAPH on melt-crystallization behavior (DSC), thermal degradation (TGA) and mechanical properties of PLLA. The melt-crystallization results demonstrated that NAPH as a heterogeneous organic nucleating agent enhanced crystallization ability of PLLA in cooling, and PLLA/1%NAPH had the best crystallization ability because of the highest onset crystallization temperature and the sharpest melt-crystallization peak. However, melt-crystallization behavior also depended on the cooling rate and final melting temperature, overall, a relative slow cooling rate and low final melting temperature were beneficial for crystallization of PLLA. The cold-crystallization results indicated that NAPH had an inhibition for cold-crystallization process of PLLA, and the cold-crystallization peak shifted towards lower temperature and became wider with an increase of NAPH concentration. The different melting behaviors of PLLA/NAPH after melt-crystallization and isothermal-crystallization efficiently reflected the accelerating role of NAPH for PLLA crystallization; the double melting peaks formed in heating were thought to result from melting-recrystallization, as well as that a higher crystallization temperature could cause melting peak to appear in higher temperature regions and possess larger melting enthalpy. A comparative analysis on thermal degradation in air illustrated that the addition of NAPH accelerated decomposition of PLLA, but a decrease of onset decomposition temperature was inhibited by the probable interaction of PLLA with NAPH. Moreover, the tensile test showed that NAPH decreased tensile modulus and elongation at break of PLLA, whereas PLLA with low concentration of NAPH had higher tensile strength than pure PLLA.
Poli(kwas L-mlekowy) (PLLA) modyfikowano dodatkiem 0,5−3 % mas. dihydrazydu kwasu N,N’-bis(fenylo) 1,4-naftalenodikarboksylowego (NAPH). Zbadano wpływ NAPH na topnienie i krystalizację (DSC), degradację termiczną (TGA) i właściwości mechaniczne PLLA. Analiza procesu krystalizacji ze stanu stopionego modyfikowanego PLLA wykazała, że NAPH, jako heterogeniczny organiczny środek zarodkujący, zwiększał zdolność do krystalizacji PLLA podczas chłodzenia, a próbka PLLA/1% NAPH charakteryzowała się najwyższą temperaturą początku krystalizacji i najostrzejszym pikiem krystalizacji ze stanu stopionego. Przebieg procesu krystalizacji zależał również od szybkości chłodzenia i końcowej temperatury topnienia próbki. Względnie mała szybkość chłodzenia i niska końcowa temperatura topnienia były korzystne dla procesu krystalizacji PLLA. Analiza procesu zimnej krystalizacji wskazała, że obecność NAPH hamowała zimną krystalizację PLLA, jej pik przesuwała w kierunku niższych wartości temperatury, a wraz ze wzrostem stężenia NAPH pik stawał się szerszy. Różny przebieg procesów topnienia PLLA/NAPH po krystalizacji ze stanu stopionego i krystalizacji izotermicznej odzwierciedla przyspieszającą rolę NAPH w krystalizacji PLLA. Autorzy uważają, że podwójne piki topnienia powstające podczas ogrzewania wynikają z zachodzącego procesu topnienia-rekrystalizacji, a także, że wyższa temperatura krystalizacji może być przyczyną pojawienia się piku topnienia w obszarach wyższej temperatury i zwiększenia entalpii topnienia. Analiza porównawcza rozkładu termicznego w atmosferze powietrza wykazała, że dodatek NAPH przyspieszył rozkład PLLA, ale prawdopodobne oddziaływanie PLLA z NAPH wpłynęło na zmniejszenie temperatury początku rozkładu. Ponadto, dodatek większej ilości NAPH spowodował zmniejszenie modułu sprężystości przy rozciąganiu i wydłużenia przy zerwaniu PLLA, jednak PLLA zawierający niewielką ilość NAPH wykazywał większą wytrzymałość na rozciąganie niż niemodyfikowany PLLA.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Analysis of Clothing Image Classification Models: A Comparison Study between Traditional Machine Learning and Deep Learning Models
Autorzy:: Xu, Jun
Wei, Yumeng
Wang, Aichun
Zhao, Heng
Lefloch, Damien
Tematy:: e-commerce
clothing image classification
traditional machine learning
CNN
HOG
SVM
small VGG network; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/2200761.pdf Link otwiera się w nowym oknie
Opis:: Clothing image in the e-commerce industry plays an important role in providing customers with information. This paper divides clothing images into two groups: pure clothing images and dressed clothing images. Targeting small and medium-sized clothing companies or merchants, it compares traditional machine learning and deep learning models to determine suitable models for each group. For pure clothing images, the HOG+SVM algorithm with the Gaussian kernel function obtains the highest classification accuracy of 91.32% as compared to the Small VGG network. For dressed clothing images, the CNN model obtains a higher accuracy than the HOG+SVM algorithm, with the highest accuracy rate of 69.78% for the Small VGG network. Therefore, for end-users with only ordinary computing processors, it is recommended to apply the traditional machine learning algorithm HOG+SVM to classify pure clothing images. The classification of dressed clothing images is performed using a more efficient and less computationally intensive lightweight model, such as the Small VGG network.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Analysis of Clothing Image Classification Models: A Comparison Study between Traditional Machine Learning and Deep Learning Models
Autorzy:: Wang, Aichun
Zhao, Heng
Xu, Jun
Lefloch, Damien
Wei, Yumeng
Wydawca:: Sciendo
Cytata wydawnicza:: Xu, Jun, et al. "Analysis of Clothing Image Classification Models: A Comparison Study between Traditional Machine Learning and Deep Learning Models" Fibres & Textiles in Eastern Europe, vol. 30, no. 5, Sciendo, 2022, pp. 66-78. https://doi.org/10.2478/ftee-2022-0046
Opis:: Clothing image in the e-commerce industry plays an important role in providing customers with information. This paper divides clothing images into two groups: pure clothing images and dressed clothing images. Targeting small and medium-sized clothing companies or merchants, it compares traditional machine learning and deep learning models to determine suitable models for each group. For pure clothing images, the HOG+SVM algorithm with the Gaussian kernel function obtains the highest classification accuracy of 91.32% as compared to the Small VGG network. For dressed clothing images, the CNN model obtains a higher accuracy than the HOG+SVM algorithm, with the highest accuracy rate of 69.78% for the Small VGG network. Therefore, for end-users with only ordinary computing processors, it is recommended to apply the traditional machine learning algorithm HOG+SVM to classify pure clothing images. The classification of dressed clothing images is performed using a more efficient and less computationally intensive lightweight model, such as the Small VGG network.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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