Autor: Wang, H. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Contextual probability
Autorzy:: Wang, H.
Tematy:: mathematical foundations
knowledge representation
machine learning
uncertainty
data mining; Pokaż więcej
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/307791.pdf Link otwiera się w nowym oknie
Opis:: In this paper we present a new probability function G that generalizes the classical probability function. A mass function is an assignment of basic probability to some context (events, propositions). It represents the strength of support for some contexts in a domain. A context is a subset of the basic elements of interest in a domain - the frame of discernment. It is a medium to carry the "probabilistic" knowledge about a domain. The G function is defined in terms of a mass function under various contexts. G is shown to be a probability function satisfying the axioms of probability. Therefore G has all the properties attributed to a probability function. If the mass function is obtained from probability function by normalization, then G is shown to be a linear function of probability distribution and a linear function of probability. With this relationship we can estimate probability distribution from probabilistic knowledge carried in some contexts without any model assumption.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effects of Se deficiency on serum histamine concentration and the expression of histamine H2 receptor in the jejunum of chickens
Autorzy:: Wang, G.
Wang, H.
Tematy:: selenium deficiency
serum
histamine concentration
histamine expression
histamine H2 receptor
mast cell
jejunum
chicken; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/30144.pdf Link otwiera się w nowym oknie
Opis:: The present study was designed to investigate the influence of Se deficiency on serum histamine concentration and the expression of histamine receptor in the jejunum of chickens. Forty neonatal chickens were randomly divided into two groups. Experimental chickens were fed a low-Se diet (0.034 mg/kg), whereas chickens in the control group were fed a diet with a Se level of 0.229 mg/kg. Ten chickens were sacrificed on days 30, 45, 60 and 75. Blood and jejunum samples were collected. Histamine concentration in the jejunum was measured by ELISA, the jejunal mast cell (MC) ultrastructure was studied by transmission electron microscopy, and the expression level of histamine H2 receptor (H2R) mRNA in the jejunum was examined using real-time PCR. Results: The jejunal histamine concentration in chickens fed the low-Se diet was significantly higher than that in the control group (P<0.01). Se deficiency induced degranulation of MC in the jejunum of chickens in the low-Se diet group; their cytoplasm was filled with fused granules and vacuoles. The expression level of jejunal H2R mRNA in chickens fed the low-Se diet was also significantly higher than that in the control group (P<0.01). The results obtained suggest that Se deficiency stimulates MC degranulation and release of histamine, binding H2R promotes both regulation of digestion and cell proliferation while protects the jejunum from injury induced by Se deficiency.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Preparation of hydrogel beads based on sodium alginate and aqueous extract from pomegranate peel and its cyanobacteria removal performance
Autorzy:: Wang, H.
Zhang, L.
Tematy:: cells cytology
efficiency
removal sodium
sodium alginate
water supply
cytologia komórek
wydajność
usuwanie sodu
alginian sodu
zaopatrzenie w wodę; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/208301.pdf Link otwiera się w nowym oknie
Opis:: In recent years, harmful cyanobacterial blooms frequently occurred all over the world, causing great damage to ecosystems, fishery resources, and recreational facilities. Therefore, the removal of harmful cyanobacterial blooms is a crucial step for the maintenance of safe water supplies and for the safety of aquatic products. Hydrogel beads based on sodium alginate and an aqueous extract from pomegranate peel were prepared, and used for removing Microcystin aeruginosa. The removal efficiencies of hydrogel beads to M. aeruginosa and the factors affecting its removal from solutions (the ratio of material to solvent, the dosage of hydrogel beads, and the density of M. aeruginosa cells) were investigated. The optimum ratio of material to solvent, the dosage of hydrogel beads and the density of M. aeruginosa cells were 0.03 g/cm³, 100 g/dm³and less than 8.68×106 cells/cm³, respectively. When the density of M. aeruginosa cells was below 8.68×106 cells/cm³, the removal efficiency of cyanobacteria was above 99.21% at the dose of 100 g/dm³. The pomegranate peel and sodium alginate, as natural materials, were safe and innocuous, providing simple operation, low cost and high availability. Therefore, the hydrogel beads offer favorable characteristics in M. aeruginosa removal.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A reliability evaluation study based on competing failures for aircraft engines
Badania dotyczące oceny niezawodności silników lotniczych w oparciu o uszkodzenia konkurujące
Autorzy:: Wang, H.
Gao, J.
Tematy:: silnik lotniczy
ocena niezawodności
uszkodzenia konkurujące
bayesowskie uśrednianie modeli
fuzja danych
aircraft engine
reliability evaluation
competing failures
Bayesian model averaging
data fusion; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Powiązania:: https://bibliotekanauki.pl/articles/300888.pdf Link otwiera się w nowym oknie
Opis:: Aircraft engine is a complex and repairable system, and the diversity of its failure modes increases the difficulty of reliability evaluation. It is necessary to establish a dynamic relationship among data, failure mode and system reliability, to achieve the scientific reliability evaluation for aircraft engines. This paper has used data fusion method to establish reliability evaluation models respectively for performance degradation failures and sudden failures. Furthermore, these two models have been integrated on the basis of competing failures’ mechanism. Bayesian model averaging has been used to analyze the impacts of performance degradation failures and sudden failures on aircraft engines’ reliability. As a result of above, the goal of an accurate evaluation of the reliability for aircraft engines has been achieved. Example shows the effectiveness of the proposed model.
Silnik samolotu to złożony system naprawialny, w którym różnorodność przyczyn uszkodzeń zwiększa trudność oceny niezawodności. Dlatego też istnieje konieczność ustalenia dynamicznych związków pomiędzy danymi, przyczynami uszkodzenia i niezawodnością systemu, których znajomość pozwoliłaby przeprowadzać naukową ocenę niezawodności silników lotniczych. W prezentowanej pracy wykorzystano metodę fuzji danych do opracowania modeli oceny niezawodności w zakresie uszkodzeń wynikających z obniżenia charakterystyk oraz uszkodzeń nagłych. Ponadto, opracowane modele zintegrowano na podstawie mechanizmu uszkodzeń konkurujących. Do analizy wpływu dwóch omawianych typów uszkodzeń na niezawodność silników lotniczych wykorzystano procedurę bayesowskiego uśredniania modeli. Dzięki powyższym krokom, osiągnięto założony cel dokładnej oceny niezawodności silników samolotowych. Przykład pokazuje skuteczność proponowanego modelu.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Operation reliability analysis based on fuzzy support vector machine for aircraft engines
Analiza niezawodności eksploatacyjnej silników lotniczych w oparciu o metodę rozmytej maszyny wektorów nośnych (FSVM)
Autorzy:: Gao, J.
Wang, H.
Tematy:: aircraft engine
reliability analysis
competing failure
Bayesian model averaging
data fusion
silnik samolotu
analiza niezawodności
uszkodzenie konkurujące
bayesowskie uśrednianie modeli
fuzja danych; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Powiązania:: https://bibliotekanauki.pl/articles/301319.pdf Link otwiera się w nowym oknie
Opis:: The aircraft engine is a complex and repairable system, and the diversity of its failure modes increases the difficulty of operation reliability analysis. It is necessary to establish a dynamic relationship among monitoring information, failure mode and system reliability for achieving scientific reliability analysis for aircraft engines. This paper has used fuzzy support vector machine (FVSM) method to fuse condition monitoring information. The reliability analysis models including Gamma process model and Winner process model, respectively for different failure modes, have been presented. Furthermore, these two models have been integrated on the basis of competing failures’ mechanism. Bayesian model averaging has been used to analyze the effects of different failure modes on aircraft engines’ reliability. As a result of above, the goal of an accurate analysis of the reliability for aircraft engines has been achieved. Example shows the effectiveness of the proposed model.
Silnik samolotu to złożony system naprawialny, a różnorodność przyczyn jego uszkodzeń zwiększa trudność analizy niezawodności eksploatacyjnej. Istnieje konieczność ustalenia dynamicznych związków pomiędzy monitorowaniem informacji, przyczynami uszkodzeń i niezawodnością systemu, których znajomość pozwoliłaby przeprowadzać naukową analizę niezawodności silników lotniczych. Do integracji danych z monitorowania informacji, w pracy wykorzystano metodę rozmytej maszyny wektorów nośnych (FSVM). Dla różnych przyczyn uszkodzeń, przedstawiono odpowiednie modele analizy niezawodności – model procesu Gamma i model procesu Wienera. Przedstawione modele zintegrowano na podstawie mechanizmu uszkodzeń konkurujących. Do analizy wpływu różnych przyczyn uszkodzeń na niezawodność silników lotniczych wykorzystano procedurę bayesowskiego uśredniania modeli. Dzięki powyższym krokom, osiągnięto założony cel dokładnej analizy niezawodności silników samolotowych. Przykład pokazuje skuteczność proponowanego modelu.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Properties of fatty acid/dodecylamine mixtures and their application in steam coal reverse flotation
Autorzy:: Shen, L.
Wang, H.
Tematy:: steam coal
surfactant mixture
reverse flotation
fatty acids
surface activity; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/109571.pdf Link otwiera się w nowym oknie
Opis:: A series of surfactant mixtures which consist of DAH (dodecylamine hydrochloride) and fatty acids (FAD) were made in this study. The characteristics of these fatty acids/DAH mixtures, including surface tension, critical micelle concentration (CMC) and adsorption onto coal were investigated. The reverse flotation results with these fatty acids/DAH mixtures (FAD) and DAH were compared with each other. Experimental results showed that the fatty acids/ DAH mixtures have lower CMC and γcmc than DAH. The adsorption test indicated that more amine molecules would adsorb preferentially onto the bubbles surface in FAD solutions than that in DAH solutions. Reverse flotation results showed that about 50% surfactant dosage was saved under the same froth product yield. Only 28% froth product yield was obtained in the presence of 1.66 kg/Mg DAH. However, when 0.83 kg/Mg hexadecanoic acid/DAH mixture (C16D) surfactant was used, the froth product yield reached 29%. Dodecanoic acid/DAH mixture (C12D) surfactant a showed better performance with a high mineral matter recovery similar to that with tetradecanoic acid/DAH mixture (C14D) and higher combustible recovery than with C14D and C16D.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Definition and classification criteria of logistics services for elderly
Autorzy:: Jarocka, M.
Wang, H.
Tematy:: logistics service
elderly
definition
classification
ageing population
usługa logistyczna
ludzie starsi
definicja
klasyfikacja
starzejące się społeczeństwo; Pokaż więcej
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:: https://bibliotekanauki.pl/articles/125629.pdf Link otwiera się w nowym oknie
Opis:: An ageing population is a natural and inevitable phenomenon that constitutes an opportunity for the development of the logistics services industry. This is related to the fact that a new demographic profile of the world is determined by a growing number of customers — seniors – with special needs that generate the demand for services such as carriage and home delivery of food and medicines. Therefore, considering the growing demand for logistics services intended for older adults, there is a justified need to develop theoretical knowledge in this area. The paper aims to define a logistics service dedicated to an elderly person as the ultimate recipient as well as to identify the classification criteria of such services. The first part of the article is based on a literature review and presents definitions of a service and a logistics service according to various researchers. It also identifies different classifications of logistics services. These theoretical aspects provided a basis for authors to propose the notion of a logistics service and a catalogue of criteria for systemising logistics services dedicated to older adults. Logistics services for the elderly may be grouped according to classification criteria applicable to what is widely understood as logistics services in source literature. The classification criteria are the type of service, the immateriality of service, the frequency of contacting the customer, the type of purchaser market, the degree of service customisation, the type of a relationship between the service enterprise and the customer, and the place of service provision. Nonetheless, due to the customer-oriented approach in logistics, the authors proposed the classification criteria of these services with regard to age, financial situation, needs, health, expectations, hobby, skills and problems of older adults. Such an approach to classification is determined by considerable inherent diversification of the discussed group of customers as well as a specialised catalogue of logistics services. The classification of logistics services may contribute to the improved design of such services.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Modifying effect of electron beam irradiation on magnetic property of iron-bearing minerals
Autorzy:: Wang, H.
Lu, S.
Tematy:: magnetic susceptibility
iron bearing mineral
sulfide
electron beam irradiation; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/109818.pdf Link otwiera się w nowym oknie
Opis:: The effect of electron beam irradiation on magnetic property of iron bearing minerals was investigated by susceptibility measurements. The results show that the magnetic susceptibility of iron bearing sulfide minerals can be enhanced remarkably by strong beam current irradiation, while the magnetic susceptibility of oxidized iron minerals keeps unchanged and even is slightly reduced. The magnetic susceptibility of arsenopyrite can reach the ferromagnetic level. The particle size of irradiated minerals makes notable effects on magnetic susceptibility. The magnetic susceptibility of irradiated minerals is enhanced greatly with reduction of particle size, and the irradiation dose corresponding to the maximum magnetic susceptibility is decreased simultaneously. Exposure of pyrite to small beam current electron irradiation can only enhance its magnetic susceptibility from 4 to 5-fold. Enhancement of magnetic property by radiation induced defects and excitation in minerals is limited. Strong beam current electron irradiation provides a novel approach to enlarge the magnetic property differences between iron bearing minerals.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Interferon-γ-mediated gene expression in porcine alveolar macrophage; An in vitro model
Autorzy:: Liu, Q.
Wang, H.-Y.
Tematy:: pig
alveolar macrophage
IFN-γ
transcriptomic analysis; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2087220.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Laser frequency stability estimation and velocity measurement in the atmosphere with self-heterodyne
Autorzy:: Zhang, H.
Wang, H.
Zhao, S.
Tematy:: frequency stability
atmospheric propagation
self-heterodyne
Doppler velocity; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/174066.pdf Link otwiera się w nowym oknie
Opis:: We present a novel method of self-heterodyne for laser frequency stability estimation in the atmosphere. At the same time, it is used in the Doppler velocity measurement for moving targets in the atmosphere. The transmission range is 16.2 km (round-trip propagation with 8.1 km) in the horizontal atmospheric path, and the measuring results showed that the frequency stability of the whole laser detection system is 53.4 kHz with 20.7 kHz stand deviation. This frequency stability is the integrated influence with the whole detection system not just for the laser, but it can be considered as the estimation of the laser’s frequency stability. It is much more practical for the heterodyne detection in the atmosphere. At last, the method of self-heterodyne was used for 16.2 km round trip velocity measurement. It is showed that the velocity absolute error is less than 1.5 cm/s in the turbulent atmosphere, and the relative error is not higher than 5%.
Dostawca treści:: Biblioteka Nauki

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