Autor: Zhou, Li - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Energy consumption reduction method for green buildings based on human thermal discomfort posture recognition algorithm
Autorzy:: Song, Shijiu
Zhou, Li
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/59111126.pdf Link otwiera się w nowym oknie
Opis:: The energy consumption of air conditioning systems accounts for more than 50% of building energy consumption. The supercooled and overheated environment provided by intelligent buildings can bring a large amount of energy loss. How to create comfortable spaces with energy-saving goals is currently the focus of research. The aim of this study is to improve the accuracy of human thermal discomfort pose recognition algorithms. This study first extracts human key points on the ground of bone key points, then normalizes the data, and finally constructs a human thermal uncomfortable posture recognition algorithm on the ground of deep learning technology. The experiment showcases that in the training set, when the iteration number is 1500, the accuracy reaches its maximum value, which is 99.98%. In the test set, the accuracy reached its maximum value of 89.85% when the iteration number was 400. After classifying the dataset, the accuracy of the first type dataset reached 99.51%. The accuracy rate of the second type dataset is 98.56%, and the accuracy rate of the third type dataset is 98.95%. In the comparison of the four algorithms, the accuracy of the research algorithm is significantly higher than the other three algorithms, indicating that the research algorithm can accurately recognize the thermal uncomfortable posture of the human body. This research algorithm can timely and effectively identify the uncomfortable posture of the human body, thereby automatically adjusting indoor temperature and achieving energy conservation and emission reduction.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Adjacent vertex strongly distinguishing total coloring of graphs with lower average degree
Autorzy:: Wen, Fei
Zhou, Li
Li, Zepeng
Tematy:: adjacent vertex strongly distinguishing total-coloring
adjacent
vertex strongly distinguishing total chromatic number
maximum average
degree
discharging method; Pokaż więcej
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Powiązania:: https://bibliotekanauki.pl/articles/59950941.pdf Link otwiera się w nowym oknie
Opis:: An adjacent vertex strongly distinguishing total-coloring of a graph $G$ is a proper total-coloring such that no two adjacent vertices meet the same color set, where the color set of a vertex consists of all colors assigned on the vertex and its incident edges and neighbors. The minimum number of the colors required is called adjacent vertex strongly distinguishing total chromatic number, denoted by $ \chi_{ast}(G) $. Let $ \text{mad}(G)$ and $\Delta(G)$ denote the maximum average degree and the maximum degree of graph $G$, respectively. In this paper, we prove the following results. (1) If $G$ is a graph with $ \text{mad}(G) < \tfrac{7}{3} $ and $\Delta(G)\geq5$, then $ \chi_{ast}(G) \leq\max\{\Delta(G)+2, 8\} $. (2) If $G$ is a graph with $ \text{mad}(G) < \tfrac{9}{4} $ and $4\leq\Delta(G)\leq5$, then $ \chi_{ast}(G)\leq\Delta(G)+2 $. (3) If $G$ is a graph with $ \text{mad}(G) <\tfrac{9}{4} $ and $\Delta(G)=3$, then $ \chi_{ast}(G)\leq6 $.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Understanding cultural specificity of positive emotions in SLA: The antecedents of foreign language enjoyment and peace of mind in the Chinese context
Autorzy:: Zhou, Li
Lochtman, Katja
Xi, Yiheng
Tematy:: positive emotions
foreign language enjoyment
foreign language peace of mind
learner-internal variables
teacher-related variables; Pokaż więcej
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Powiązania:: https://bibliotekanauki.pl/articles/59498753.pdf Link otwiera się w nowym oknie
Opis:: Recent evidence suggests that Chinese foreign language (FL) learners’ positive emotional experiences are conveyed not only by the prevalent emotion of foreign language enjoyment (FLE), but also by the culture-specific emotion of foreign language peace of mind (FLPOM) which describes an inner state of peace and harmony. This study seeks to determine the role of various demographic and learner- and teacher-related factors in arousing FLE and FLPOM in the Chinese context. Participants were 436 learners from four Chinese middle schools. Multiple regression analyses revealed that learners’ attitudes towards the teacher (i.e., a teacher-related variable) was the strongest predictor for FLE, whereas FLPOM was best predicted by learners’ attitudes towards the FL (i.e., a learner-internal variable). Moreover, the variance in FLE was better accounted for by teacher-related variables (52.4%) than by learner-internal variables (40.1%), whereas the variance in FLPOM was better explained by learner-internal variables (42.3%) than by teacher-related variables (34.7%). Practical implications for teaching FL in the Chinese context are discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A new model for predicting the axial compression capacity of reinforced concrete cylinders strengthened with CFRP
Autorzy:: Guo, Guang
Zhou, Li
Wang, Bangkang
Tematy:: innovative model
axial compression capacity
reinforced concrete
cylinder
CFRP
model innowacyjny
zdolność ściskania osiowego
beton wzmocniony; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/59110959.pdf Link otwiera się w nowym oknie
Opis:: Numerous scholars have identified the shortcomings of imprecise terminology and substantial computational inaccuracies in the current models for predicting the axial compression capacity of CFRPstrengthened reinforced concrete (RC) cylinders. To improve the prediction accuracy of the axial compressive capacity model for CFRP-strengthened RC cylinders, the present axial compressive capacity model for CFRP-strengthened RC cylinders was scrutinized and evaluated. Drawing on Mander’s constraint theory and the concrete triaxial strength model, a novel axial compressive capacity model for CFRP-strengthened RC cylinders was proposed. This study collected 116 experimental data on the axial compression of CFRP-strengthened RC cylinders and analyzed the accuracy of various models using the data. The findings indicate that the model proposed in this study outperforms other models in predicting axial compression capacity and demonstrates high prediction accuracy. Furthermore, an analysis is conducted on the variation law of the model’s predicted value with respect to the design parameters. The proposed model in this study identifies concrete strength, stirrup spacing, and elastic modulus of CFRP as the primary factors that influence the axial compression capacity of CFRP-strengthened RC cylinders.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A novel polypeptide from Cervus nippon Temminck proliferation of epidermal cells and NIH3T3 cell line
Autorzy:: Guan, Shu-Wen
Duan, Leng-Xin
Li, Yuan-Yuan
Wang, Ben-Xiang
Zhou, Qiu-Li
Tematy:: polypeptide
velvet antler
promoting cell proliferation; Pokaż więcej
Wydawca:: Polskie Towarzystwo Biochemiczne
Powiązania:: https://bibliotekanauki.pl/articles/1041255.pdf Link otwiera się w nowym oknie
Opis:: A novel polypeptide, velvet antler polypeptide (VAPPs), having a stimulary effect on proliferation of some cell was isolated from the velvet antler of sika deer (Cervus nippon Temminck). This polypeptide consists of a single chain of 32 amino-acid residues VLSAT DKTNV LAAWG KVGGN APAFG AEALE RM. VAPPs showed marked stimulary effect on rat epidermal cells and NIH3T3 cell line (dose range from 10-40 mg·L-1 and 5-80 mg·L-1, respectively).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Effect of moisture content in coal dust on filtration and cleaning performance of filters
Autorzy:: Li, J.
Li, S.
Zhou, F.
Tematy:: coal dust
moisture content
filtration
compressibility
adhesive force; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/110692.pdf Link otwiera się w nowym oknie
Opis:: A large amount of fugitive coal dust is generated during the mining, transportation, and processing of coal. The moisture content of the coal dust has a significant influence on the dust collection performance of filters, although relatively few studies on this phenomenon exist. This study deals with six groups of coal dust samples with moisture contents ranging from 0 to 12 wt.% and tested the pressure drop as the coal dust was deposited onto three different types of filters. The specific resistance, compression coefficient, and porosity of the coal dust cake were analyzed, and the cake/filter adhesive force was tested using the reverse flow cleaning method. This research demonstrates that the influence of the moisture content on the specific resistance, compression coefficient, and porosity of the coal dust cake can be divided into two phases (according to the critical moisture content of 4 wt.%): first, as the moisture content increased from 0 to 4 wt.%, the cake resistance and compression coefficient increased and the cake porosity decreased; and second, as the moisture content increased from 4 to 12 wt.%, the cake resistance and compression coefficient decreased and the porosity increased. The coated and repellent filters possessed a lower adhesive force on the coal dust cake than the conventional filter. The comparison of all three of the filters revealed that the adhesive force between the repellent filter and the dust cake was the least sensitive to the moisture content.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Przemiany w chińskim rolnictwie. Doświadczenia i wnioski
Agriculture transition in China: Experiences and Lessons Learned
Autorzy:: Li, Zhou
Ren, Changquing
Wydawca:: Instytut Rozwoju Wsi i Rolnictwa Polskiej Akademii Nauk
Powiązania:: Justin Yifu Lin, 1992: Rural Reforms and Agricultural Growth in China. American Economic Review, Vol.82, Issue 1, pp. 34–51.
Wieś i Rolnictwo
Zhang, Jun, Zhihao Tan, Wenjuan Li, Fei You, Wenbo Zhang, Wei Zhang, and Min Cheng, 2011: Research on China’s Grain Production Development and Spatial Distribution Evolution between 1949 and 2009. China Agricultural Science Bulletin, No.24.
Li Zhou, Haipeng Zhang, 2013: Productivity Growth in China’s Agriculture During 1985–2010. Journal of Integrative Agriculture 12: 1896–1904.
Xu, Qing, Rong Yin, and Zhanghui Liang, 2011: Economies of Scale, Return to Scale and Moderate Size of Agricultural Operation – Empirical Study Based on China’s Grain Production. Economic Research No.3. (Sociology Edition, No.6).
Department of Agriculture Policy and Law, Ministry of Agriculture (compiled),40 Years of China’s Countryside. Central Peasants Publishing 1989, pp. 30–132.
Li Zhou, 2014: Achievements and Challenges in China’s Rural Development. China Economist No. 5, pp. 82–93.
Opis:: Agricultural development since the beginning of the reform era has played a vital role in China’s economic transition. First the rural reforms instituted during the household responsibility system period significantly improved agricultural output and productivity while simultaneously lifting hundreds of millions of farmers out of absolute poverty. Secondly, the massive labor flow from rural to urban areas due both to increases in agricultural productivity and systemic policy reforms associated with labor mobility also resulted in significant economic growth. This shift in the workforce is a major factor in explaining China’s success with respect to both industrialization and urbanization. Thirdly, agricultural development, including increases in gross output as well as improved production efficiency, has enabled China to respond effectively to the challenge of feeding 1/5 of the world’s population while relying on only 7% of the world’s arable land. This article summarizes the history of China’s agricultural transition, reviews its major achievements, and analyzes lessons learned.
Rozwój rolnictwa od początku epoki reform grał kluczową rolę w przemianach gospodarczych w Chinach. Po pierwsze, reformy rolnicze wprowadzone w okresie systemu odpowiedzialności kontraktowej znacznie zwiększyły zbiory i wydajność rolnictwa, a przy tym wyprowadziły setki milionów rolników ze skrajnego ubóstwa. Po drugie, olbrzymi przepływ siły roboczej z terenów wiejskich do miejskich, spowodowany zarówno zwiększeniem produktywności rolnictwa, jak i reformami politycznymi w kwestii mobilności pracowniczej, również przyczynił się do znaczącego wzrostu gospodarczego. Powyższe przemiany w obrębie zasobów pracy są ważnym składnikiem sukcesów Chin zarówno w zakresie urbanizacji, jak i industrializacji. Po trzecie rozwój rolnictwa, prowadzący do zwiększenia produkcji brutto, jak również poprawy wydajności produkcji, pozwolił Chinom skutecznie radzić sobie z wyzwaniem żywienia 1/5 ludności świata dysponując zaledwie 7% gruntów rolnych na świecie. Niniejszy artykuł podsumowuje historię przemian w chińskim rolnictwie, przybliża ich największe osiągnięcia i analizuje płynące z nich wnioski.
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

Książka

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Skocz do pozycji: 8.

Tytuł:: Stability and bifurcation analysis for an airfoil model with a high-order nonlinear spring
Autorzy:: Li, Shuqun
Zhou, Liangqiang
Tematy:: nonlinear airfoil model
bifurcation
stability
normal form; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/2086970.pdf Link otwiera się w nowym oknie
Opis:: In this paper, the stability and bifurcation of an airfoil model with a high-order nonlinear spring are investigated both analytically and numerically. Two possible types of bifurcation at the equilibrium point are studied. It is proved that the zero characteristic root can only be a single zero. With the help of the center manifold theory and the normal form theory, the expressions of critical bifurcation curves leading to initial bifurcation and secondary bifurcation are obtained. Numerical simulations confirm the theoretical results.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Studies on the flame structure and drag of a combusting droplet group
Autorzy:: Zhou, Lixing
Li, Ke
Sun, Ting
Tematy:: droplet-group combustion
large-eddy simulation
flame structure
drag force
spalanie kropelkowe
modelowanie wielkowirowe
struktura płomienia
siła oporu; Pokaż więcej
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Powiązania:: https://bibliotekanauki.pl/articles/24202455.pdf Link otwiera się w nowym oknie
Opis:: Droplet combustion has been studied by experiments and numerical simulation for many years, and most of studies were done about single droplets. As for droplet groups, some theoretical and experimental studies were reported, but less of numerical studies. One of the important characteristics is the drag of combusting droplets, which is closely related to flame structure，and is a sub-model in numerical simulation of spray combustion. There are contradictory research results for the drag of combusting droplets. In the present paper, large-eddy simulation (LES) is used to study the flame structure and drag of a combusting ethanol-droplet group. The results show that there are three combustion modes: fully-enveloped flame, partially-enveloped flame and wake flame in a droplet group, leading to the change of the drag with inlet velocities. It is found that the drag of droplets in the group is much smaller than that of a non-combusting particle in isothermal flows.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Nowhere-Zero Unoriented 6-Flows on Certain Triangular Graphs
Autorzy:: Yang, Fan
Li, Liangchen
Zhou, Sizhong
Tematy:: nowhere-zero k -flow
triangle-tree
triangle-star
bidirected graph; Pokaż więcej
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Powiązania:: https://bibliotekanauki.pl/articles/32309450.pdf Link otwiera się w nowym oknie
Opis:: A nowhere-zero unoriented flow of graph G is an assignment of non-zero real numbers to the edges of G such that the sum of the values of all edges incident with each vertex is zero. Let k be a natural number. A nowhere-zero unoriented k-flow is a flow with values from the set {±1, . . ., ±(k − 1)}, for short we call it NZ-unoriented k-flow. Let H₁ and H₂ be two graphs, H₁⊕H₂ denote the 2-sum of H₁ and H₂, if E(H₁⊕H₂) = E(H₁) ∪ E(H₂), |V(H₁)∩V(H₂)|=2, and |E(H₁)∩E(H₂)| = 1. A triangle-path in a graph G is a sequence of distinct triangles T₁, T₂, . . ., T_m in G such that for 1 ≤ i ≤ m, |E(T_i)∩E(T_i+1)| = 1 and E(T_i)∩E(T_j)=∅ if j>i+1. A triangle-star is a graph with triangles such that each triangle having one common edges with other triangles. Let G be a graph which can be partitioned into some triangle-paths or wheels H₁, H₂, . . ., H_t such that G = H₁⊕H₂⊕...⊕H_t. In this paper, we prove that G except a triangle-star admits an NZ-unoriented 6-flow. Moreover, if each H_i is a triangle-path, then G except a triangle-star admits an NZ-unoriented 5-flow.
Dostawca treści:: Biblioteka Nauki

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