Results 121 to 130 of about 27,300 (228)

Dynamics of Technical Efficiency and Productivity Change under Central Planning: The Romanian Cement Industry 1966-1989 [PDF]

This paper investigates the time-path of efficiency and productivity change in the case of the Romanian cement industry 1966-1989. The analysis is based on different specifications of stochastic frontier models.
Cotfas, Mihai, Heshmati, Almas, Hjalmarsson, Lennart   +2 more
core  

A micro-econometric model of a short run cost function with unobserved heterogeneity [PDF]

Unobserved plant level heterogeneity and discrete production processes can produce problems for estimation. A structural model of discrete production decisions by heterogeneous plants is constructed and, as a case study, estimated for the U.S.
Prentice, David
core   +1 more source

Static Model of Cement Rotary Kiln

TecnoLógicas, 2013
In this paper, a static model of cement rotary kilns is proposed. The system model is obtained through polynomial series. The proposed model is contrasted with data of a real plant, where optimal results are obtained.
Omar D. Hernández-Arboleda, Paula A. Ortiz-Valencia, Jorge A. Herrera-Cuartas   +2 more
doaj  

Optimized transesterification of unrefined palm and waste cooking oil blend to biodiesel using cement kiln dust catalyst. [PDF]

Sci Rep
Hefney MS, Abdelmigeed MO, Ahmed TS, Ismail IM.   +3 more
europepmc   +1 more source

Preparation of Cu-Al/SiO₂ Porous Material and Its Effect on NO Decomposition in a Cement Kiln. [PDF]

Materials (Basel), 2019
Gan Y, Cui S, Ma X, Guo H, Wang Y.
europepmc   +1 more source

Synergistic effects and optimization of cement kiln dust and glass powder incorporation in self compacting mortar using central composite design. [PDF]

Sci Rep
Hammouche R, Belebchouche C, Hammoudi A, Douadi A, Hebbache K, Boutlikht M, Berkouche A, Khishe M.   +7 more
europepmc   +1 more source

Optimization of bio-cement production from cement kiln dust using microalgae. [PDF]

Biotechnol Rep (Amst), 2019
Irfan MF, Hossain SMZ, Khalid H, Sadaf F, Al-Thawadi S, Alshater A, Hossain MM, Razzak SA.   +7 more
europepmc   +1 more source

Modelling performance in a Balanced Scorecard : findings from a case study [PDF]

Cet article s'intéresse à la mise en place de l'approche dite du "Balanced Scorecards" dans des unités opérationnelles plutôt qu'au niveau d'une direction générale. Il s'appuie sur une étude de cas.
Jean-Pierre Ponssard, Olivier Saulpic
core  

A modified approach towards facile and green conversion of cement kiln dust wastes to efficient hydroxyapatite-carbon nanocomposite water adsorbents. [PDF]

Sci Rep
Ahmed AS, Farghal HH, Youssef N, El-Sayed MMH.   +3 more
europepmc   +1 more source

Thermal reaction characteristics of dioxins on cement kiln dust. [PDF]

RSC Adv, 2018
Zhan MX, Pan S, Deviatkin I, Chen T, Li XD.   +4 more
europepmc   +1 more source