Temat: retention models - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Semi-empirical equation for the prediction of retention in normal phase liquid chromatography (NP-LC) with polar bonded stationary phases
Autorzy:: Zapała, W.
Zapała, L.
Powiązania:: https://bibliotekanauki.pl/articles/346965.pdf
Data publikacji:: 2008
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:: retention prediction
retention models
polar bonded stationary phase
NP-HPLC
Opis:: A semi-empirical heterogeneous adsorption model for the accurate prediction of analyte retention in a column chromatography with binary mobile phase on polar bonded adsorbent surface was proposed. The performance of the proposed equation was compared with two retention models reported in the literature. All models were verified for different LC systems by means of four criteria: the sum of squared differences between the experimental and theoretical data, approximation of standard deviation, Fisher test and F-test ratio.
Źródło:: Ars Separatoria Acta; 2008, 6; 15-30
1731-6340
Pojawia się w:: Ars Separatoria Acta
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Modeling of the influence of the modifier concentration on the retention process in NP-HPLC
Autorzy:: Zapała, W.
Powiązania:: https://bibliotekanauki.pl/articles/778255.pdf
Data publikacji:: 2008
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: NP-HPLC
model retencji
faza ruchoma
retention models
mobile phase composition
Opis:: The adsorption model for an accurate prediction of the analyte retention in the normal - phase liquid chromatography with a binary mobile phase has been proposed. This model was derived using a thermodynamically consistent modified competitive Langmuir isotherm. The performance of the proposed equation was compared with two retention models reported in literature. All models were verified for different NP-LC systems by use of three criteria: the sum of squared differences between the experimental and theoretical data, approximation of the standard deviation and the Fisher test.
Źródło:: Polish Journal of Chemical Technology; 2008, 10, 1; 52-56
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Retencja versus elastyczność zatrudnienia (determinanty strategiczno-kulturowe)
Retention Versus Employment Flexibility (Strategic and Culturally Determinants)
Autorzy:: Król, Małgorzata
Powiązania:: https://bibliotekanauki.pl/articles/1195923.pdf
Data publikacji:: 2012
Wydawca:: Szkoła Główna Handlowa w Warszawie
Tematy:: employment retention
employment flexibility
models of employment
organizational culture
personnel strategy
Opis:: This article presents the problems of employment retention and flexibility. Organizations are mainly focused on employees who have high and rare competences. Retention is typical for this group of workers so they get contracts for an unspecified time (typical form of employment). On the contrary flexibility is typical for workers with low and easy available competences. Hence, they usually get limited time contracts. The models of employment can be also matched with the retention and flexibility. Permanent job and retention of workers are typical for traditional model of employment. In flexible model there are three different groups of employees, i.e.: stable workers, peripheries workers and outside collaborators. Peripheries workers and outside collaborators constitute the flexible / inconstant part of employment in the organization. This paper also shows that organizational culture and personnel strategy have an impact on employment retention and flexibility. We can find kinds of organizational culture and personnel strategy which either support or not retention or flexibility.
Źródło:: Edukacja Ekonomistów i Menedżerów; 2012, 23, 1; 24-43
1734-087X
Pojawia się w:: Edukacja Ekonomistów i Menedżerów
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Impatient customers in Markovian queue with Bernoulli feedback and waiting server under variant working vacation policy
Autorzy:: Bouchentouf, Amina Angelika
Yahiaoui, Lahcene
Kadi, Mokhtar
Majid, Shakir
Powiązania:: https://bibliotekanauki.pl/articles/1181936.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: queueing models
variant of a multiple working vacation
balking
reneging
retention of reneged customers
simulation
Opis:: This paper deals with customers’ impatience behaviour for single server Markovian queueing system under K-variant working vacation policy, waiting server, Bernoulli feedback, balking, reneging, and retention of reneged customers. Using the probability generating function (PGF) technique, we obtain the steady-state solution of the system. Besides, we prove the stochastic decomposition properties. Useful performance measures of the considered queueing system are derived. A cost model is developed. Then, the parameter optimisation is carried out numerically, using a quadratic fit search method (QFSM). Finally, numerical examples are provided to visualise the analytical results.
Źródło:: Operations Research and Decisions; 2020, 30, 4; 5-28
2081-8858
2391-6060
Pojawia się w:: Operations Research and Decisions
Dostawca treści:: Biblioteka Nauki

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