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    Wyświetlanie 1-10 z 10
    Tytuł:
    Open-source Software Reliability Modeling with Stochastic Impulsive Differential Equations
    Autorzy:
    Zheng, Zhoutao
    Yang, Jianfeng
    Hu, Yao
    Wang, Xibing
    Powiązania:
    https://bibliotekanauki.pl/articles/24200824.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    open-source software
    reliability modeling
    random impulse
    stochastic impulsive differential equations
    Opis:
    In reality, sudden updates of software, attacks of hackers, influence of the Internet market, etc. can cause a surge in the number of open-source software (OSS) faults (this moment is the time when impulse occurs), which results in impulsive phenomenon. For the existing software reliability models, dynamic process of software fault is considered to be continuous when assessing reliability, but continuity of the process can be disrupted with appearance of random impulses. Thus, to more accurately assess software reliability, we proposed an OSS reliability model with SIDE. In the model, dynamic process of software fault is divided into a continuous and a skipped part, described the continuous part of the process with SDE, and described destruction of the continuity caused by unpredictable random events with random impulses. Finally, the proposed model is verified with two datasets from real OSS project, and the results show that the proposed model is more in line with reality and has better fitting effect than the existing models.
    Źródło:
    Eksploatacja i Niezawodność; 2023, 25, 2; art. no. 166342
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A support vector machine with the tabu search algorithm for freeway incident detection
    Autorzy:
    Yao, B.
    Hu, P.
    Zhang, M.
    Jin, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/329943.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    automated incident detection
    support vector machine (SVM)
    tabu search
    freeway
    maszyna wektorów wspierających
    odcinek swobodny trasy
    algorytm tabu search
    Opis:
    Automated Incident Detection (AID) is an important part of Advanced Traffic Management and Information Systems (ATMISs). An automated incident detection system can effectively provide information on an incident, which can help initiate the required measure to reduce the influence of the incident. To accurately detect incidents in expressways, a Support Vector Machine (SVM) is used in this paper. Since the selection of optimal parameters for the SVM can improve prediction accuracy, the tabu search algorithm is employed to optimize the SVM parameters. The proposed model is evaluated with data for two freeways in China. The results show that the tabu search algorithm can effectively provide better parameter values for the SVM, and SVM models outperform Artificial Neural Networks (ANNs) in freeway incident detection.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2014, 24, 2; 397-404
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Particle Flow Code modeling of the mechanical behavior of layered rock under uniaxial compression
    Modelowanie właściwości mechanicznych skał warstwowych w warunkach ściskania jednoosiowego przy zastosowaniu oprogramowania Particle Flow Code(PFC)
    Autorzy:
    Yao, Nan
    Ye, Yi-Cheng
    Hu, Bin
    Wang, Wei-Qi
    Wang, Qi-Hu
    Powiązania:
    https://bibliotekanauki.pl/articles/218969.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    skała warstwowa
    wytrzymałość na ściskanie jednoosiowe
    Particle Flow Code (PFC)
    kąt uwarstwienia
    mikropęknięcia
    layered rock
    uniaxial compression test
    bedding angle
    microcracks
    Opis:
    In this paper, the different mechanical behaviors of layered rocks with different bedding angles during uniaxial compression tests are studied. Numerical simulation models of layered rock are validated based on laboratory tests, and uniaxial compression tests are conducted by using Particle Flow Code (PFC). Using these simulations, the uniaxial compressive strength, failure patterns, development of micro-cracks, and displacement of meso particles are analyzed. When the bedding angle is similar to the failure angle, the macro failure planes develop directly along the beddings, the bedding behavior dictates the behavior of the layered rock, reducing the compressive strength.
    W pracy badano właściwości mechaniczne skał warstwowych zalegających pod różnym kątem uwarstwienia w warunkach ściskania jednoosiowego. Walidację modeli symulacyjnych skał warstwowych przeprowadzono w oparciu o wyniki badań laboratoryjnych, zaś testy ściskania jednoosiowego prowadzono z użyciem pakietu Particle Flow Code (PFC). W oparciu o badania symulacyjne, analizowano wytrzy-małość skał na ściskanie jednoosiowe, modele pękania, powstawanie mikropęknięć i przemieszczenia mezo- cząstek. W przypadku gdy kąt płaszczyzny uwarstwienia ma wartość przybliżoną do kąta pęknięcia, płaszczyzny pękania w skali makro pojawiają się wzdłuż spękań, a układ warstw skalnych determinuje ich wytrzymałość na ściskanie, powodując jej obniżenie.
    Źródło:
    Archives of Mining Sciences; 2019, 64, 1; 181-196
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the influence on expressway safety of ramps
    Autorzy:
    Hu, J. J.
    Li, F.
    Han, B.
    Yao, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/224137.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    expressway safety
    safety
    on and off ramp
    delay
    accidents occurrence probability
    droga ekspresowa
    bezpieczeństwo na drodze ekspresowej
    rampa włączania i wyłączania
    opóźnienie
    prawdopodobieństwo wystąpienia awarii
    Opis:
    As the very important parts of the expressway system, on and off ramps have a great effect on the operation effect of expressways. Once congestion occurs at on and off ramps, it will directly affect the safety of the expressway and vehicles. So this paper first analyzes the location design of on ramps, the length and the influences on the expressway running state of off ramp downstream traffic state, and establishes the expressway operation models based at on and off ramps. The expressway operation models include off ramp delay model, on ramp delay model, expressway delay model and side road delay model under the influence of the distance between on and off ramp and traffic volume. At the same time, the paper analyzes the connection between the traffic operation state and traffic safety, and establishes the expressway safety model based on congestion degree. Through simulation verification, the impact of on and off ramp on the security of the expressway is analyzed. In the simulation, safety rank division is simulated to verify and safety index of different safety ranks. Finally the paper concludes that the delay caused by traffic of the on and off ramps can decrease the safety of expressway.
    Źródło:
    Archives of Transport; 2017, 43, 3; 43-51
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Force mechanism and conceptual design of reinforced concrete short beam without web reinforcement
    Autorzy:
    Chen, Yi-Jun
    Zhang, Hu-Zhi
    Lu, Bei-Rong
    Huang, Yao-Sen
    Powiązania:
    https://bibliotekanauki.pl/articles/2200825.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    reinforced concrete short beam
    topology optimization
    conceptual design
    load-transfer path
    Michell criterion
    Opis:
    Topology Optimization and Finite Element Analysis were carried out for reinforced concrete short beams to reveal the force mechanism. The results show that load-transfer paths for the beams can evolve from Bi-directional Evolutionary Structural Optimization and be mechanically supported by the Michell criterion. In the beams, the distribution of a high- -stress compression area appears as a truss under a concentrated load and a tie-arch under a uniform load. The beams do not have much higher bearing capacity but can consume many more materials. Consequently, new design ideas were recommended based on the load transfer paths obtained by Topology Optimization.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2022, 60, 4; 659--671
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of recombinant expression of Bombyx mori bidensovirus ns1 using a modified vector
    Autorzy:
    Li, Guohui
    Li, Mangmang
    Wang, Peng
    Hu, Zhaoyang
    Yao, Qin
    Tang, Qi
    Chen, Keping
    Powiązania:
    https://bibliotekanauki.pl/articles/1039216.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    BmBDV
    NS1
    baculovirus expression vector
    Sf9
    egfp
    Opis:
    ns1 gene of Bombyx mori bidensovirus (BmBDV) consisted of 951 nucleotides encoding a deduced 316-amino aicd protein. In this study, the gene was cloned and fused in frame with a N-terminal 6×His tag under control of the polyhedrin promoter, which was transposed into the mini-attTn7 locus of a modified baculovirus vector. Transfection of Sf-9 cells with the resulting recombinant DNA was performed to prepare recombinant virus and the resultant supernatant of transfection with fluorescent signal was harvested. Western blot analysis revealed that NS1 protein was successfully expressed in Sf9 cells infected with the recombinant virus and was confirmed by LC-MS/MS analysis. Moreover, the expressed NS1 is a phosphorylated protein and the phosphorylation site is Thr-184. These results showed that the activity of BmBDV NS1 may be regulated by phosphorylation.
    Źródło:
    Acta Biochimica Polonica; 2014, 61, 4; 787-794
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and environmental toxicity of non-sintered ceramsite using coal gasification coarse slag
    Autorzy:
    Zhao, Shenwei
    Yao, Linying
    He, Haibin
    Zou, Yiping
    Hu, Lei
    Zhai, Yujia
    Yu, Yajing
    Jia, Jianli
    Powiązania:
    https://bibliotekanauki.pl/articles/205064.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pollution
    coal gasification coarse slag
    waste control
    non-sintered ceramsite
    heavy metal fixation
    Opis:
    In this study, non-sintered ceramsite was prepared using coal gasification coarse slag obtained from a methanol plant. The basic performance and heavy metal leaching toxicity were analyzed. The results showed that seven out of nine non-sintered ceramsite groups were in accordance with the national standard of compressive strength (5 MPa), while only three groups met the national standard of water absorption index of less than 22%. The heavy metal concentrations in these three groups were found to be lower than that specified in National Class IV of surface water environment standards. The concentration of Cr was found to be 16.45 μg/L, which represents only 1% of the IV standard. The optimum mixing ratio, which showed high compressive strength (6.76 MPa) and low water absorption (20.12%), was found to be 73% coal gasification coarse slag, 15% cement, and 12% quartz sand. The characterization using Fourier transform infrared spectroscopy showed that the formation of gelatin in ceramsite enhances the performance of the ceramsite base and increases the immobilization of heavy metal. The study proved that the preparation of non-sintered ceramsite using coal gasification coarse slag reduces its environmental risk and achieves efficient utilization of the slag. Therefore, it can be concluded that it is a feasible and environmental friendly method for the disposal of coal slag.
    Źródło:
    Archives of Environmental Protection; 2019, 45, 2; 84-90
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prokaryotic expression, purification and antigenicity analysis of African swine fever virus pK205R protein
    Autorzy:
    Wu, X.
    Xiao, L.
    Peng, B.
    Wang, Y.
    Yang, Z.
    Yao, X.
    Hu, L.
    Lin, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/30963.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    African swine fever is an acute, febrile and highly virulent porcine disease causing serious economic losses worldwide. The pK205R protein of the African swine fever virus (ASFV) is largely expressed in the early stages of infection, which has given the K205R gene extensive attention. In this study, the ASFV K205R was cloned and expressed in Escherichia coli BL21 (DE3). Expression of histidine-tagged pK205R with a molecular mass of 44 kDa was determined by 12% sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot analysis. Optimisation of culture conditions allowed induction of the recombinant protein with 0.4 mM Isopropyl β-D-thiogalactoside (IPTG) at 37oC for 2 h. The protein existed in cellular supernatant and was purified using a Ni-NTA resin column. The purified protein was used to immunize rabbits four times to enable the production of polyclonal antibodies, and the antiserum titre was detected by ELISA. The results showed that the purified pK205R can react with ASFV positive serum specifically by Western blotting. The pK205R had high antigenicity, which indicated that pK205R could be used as an antigen for detection of ASFV-specific antibodies in ELISA testing, and the recombinant protein could contribute to further research of the action and structure of pK205R.
    Źródło:
    Polish Journal of Veterinary Sciences; 2016, 19, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A multiplex PCR for simultaneous detection of classical swine fever virus, African swine fever virus, highly pathogenic porcine reproductive and respiratory syndrome virus, porcine reproductive and respiratory syndrome virus and pseudorabies in swines
    Autorzy:
    Hu, L.
    Lin, X.Y.
    Yang, Z.X.
    Yao, X.P.
    Li, G.L.
    Peng, S.Z.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/30249.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    In this assay, we developed and evaluated a multiplex PCR (mPCR) for its ability in detecting multiple infections of swine simultaneously. Four pairs of primers were used to detect five viruses. Specific primers were designed for classical swine fever virus (CSFV), African swine fever virus (ASFV) and pseudorabies (PRV). A pair of primers was designed prudently for two different types of porcine reproductive and respiratory syndrome virus that respectively were porcine reproductive and respiratory syndrome virus (PRRSV), highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV). The detection limits of the mPCR were 1.09×10⁴, 1.50×10³, 2.10×10³, 1.30×10³ and 8.97×10² copies/reaction for CSFV, ASFV, HP-PRRSV, PRRSV and PRV, respectively. A total of 49 clinical specimens were tested by the mPCR, and the result showed that co-infection by two or three viruses was 51%. In conclusion, the PCR is a useful tool for clinical diagnosis of not only single infections but also mixed infections in swines.
    Źródło:
    Polish Journal of Veterinary Sciences; 2015, 18, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of organic cultivation pattern on tomato production: plant growth characteristics, quality, disease resistance, and soil physical and chemical properties
    Autorzy:
    Feng, X.
    Xu, Y.
    Liu, D.
    Peng, L.
    Dong, J.
    Yao, S.
    Feng, Y.
    Feng, Z.
    Li, F.
    Hu, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/12703546.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Tomato (Solanum lycopersicum L.) is one of the world’s most important cultivated vegetable. In the traditional cultivation methods, the excessive use of pesticides and fertilizers leads to an imbalance of nutrient elements in the soil, an increase in pests and diseases and a decrease in vegetable quality and yield. In the face of increasingly serious environmental and food problems, organic agriculture is considered to be an effective solution. In this experiment, the effects of organic cultivation patterns on the growth, quality, disease resistance in tomatoes, and the physical and chemical properties of soil were studied by different treatments. The results showed that the application of effective microorganisms (EM) bio-organic fertilizer in the cultivation process can significantly improve the yield, quality, and antioxidant enzyme activity of tomato. The use of straw mulching was found to significantly increase the growth, chlorophyll content, transpiration rate, and soluble sugar content of tomatoes. The application of EM bio-organic fertilizer or straw mulching significantly increased the activity of antioxidant enzyme and the expression of LeCHI gene in tomato leaves and enhanced tomato resistance to diseases. Organic production practices were found to significantly improve the soil.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 1; 71-84
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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