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Development of Soda Residue Concrete Expansion Agent

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Journal of Wuhan University of Technology(materials Science) 2003年第3期18卷 79-82页

作者：王宝民 m f mohd Zain f C Lai Department of Civil Engineering Dalian University of Technology faculty of Engineering U.K.m (malaysia)

A new type of concrete expansion agent has been successfully developed for the first time in the world by utilizing an industrial waste residue soda residue and an industrial *** 3%-6% of the agent into Portland cement enables a shrinkage compensating concrete to be *** and concrete containing this expansion agent have better shrinkage compensating and mechanical *** raw materials component,production process,technical properties,micro analysis of mortar made with this expansion agent,mechanism of expansion and research results are described in this *** experimental results show that the new type of concrete expansion agent accords with the standard and its main mineral component is xCaO ySO 3 zAl 2O 3.

关键词： industrial waste soda residue concrete expansion agent expansive concrete shrinkage compensating concrete

Recent developments on applications of sequential loop closing and diagonal dominance control schemes to industrial multivariable system

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Journal of Central South University 2013年第12期20卷 3401-3420页

作者： A.H.mazinan m.f.Kazemi Department of Electrical Engineering Islamic Azad University (IAU) South Tehran Branch Department of Electrical Engineering Islamic Azad University (IAU) Lahijan Branch

With a focus on an industrial multivariable system, two subsystems including the flow and the level outputs are analysed and controlled, which have applicability in both real and academic environments. In such a case, at first, each subsystem is distinctively represented by its model, since the outcomes point out that the chosen models have the same behavior as corresponding ones. Then, the industrial multivariable system and its presentation are achieved in line with the integration of these subsystems, since the interaction between them can not actually be ignored. To analyze the interaction presented, the Gershgorin bands need to be acquired, where the results are used to modify the system parameters to appropriate values. Subsequently, in the view of modeling results, the control concept in two different techniques including sequential loop closing control(SLCC) scheme and diagonal dominance control(DDC) schemes is proposed to implement on the system through the Profibus network, as long as the OPC(OLE for process control) server is utilized to communicate between the control schemes presented and the multivariable system. The real test scenarios are carried out and the corresponding outcomes in their present forms are acquired. In the same way, the proposed control schemes results are compared with each other, where the real consequences verify the validity of them in the field of the presented industrial multivariable system control.

关键词： multivariable system diagonal dominance control sequential loop closing control Profibus network OPC server orifice relation interaction analysis Gershogerin bands non-minimum phase system

Li(2p←2s)+Na(3s)pressure broadening in the far-wing and line-core profiles

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Chinese Physics B 2022年第7期31卷 247-254页

作者： f Talbi N Lamoudi L Reggami m T Bouazza K Alioua m Bouledroua Physics Department Badji Mokhtar UniversityB.P.12Annaba 23000Algeria Laboratoire de Physique des Rayonnements Badji Mokhtar UniversityB.P.12Annaba 23000Algeria Laboratoire d’Etude des Surfaces et Interfaces de la matiere Solide(LESImS) Badji Mokhtar UniversityB.P.12 Annaba 23000Algeria Laboratoire LAmA Laboratoire des Materiaux Avances(LAMA)Badji Mokhtar UniversityB.P.12 Annaba 23000Algeria Laboratoire de Physique de la matiere et du Rayonnement LPmR Universite Cherif MessaidiaB.P.1553Souk-Ahras 41000Algeria

This work reports pressure-broadening line-wing and line-core of the lithium Li(2p←2s)resonance line perturbed by ground sodium Na(3s)*** far-wing regions,the calculations are performed quantum-mechanically and are intended to examine the photoabsorption coefficients at diverse *** results show the existence of three satellites,in the blue wing near the wavelengths 470 nm and in the red wing around 862 nm and 1070 *** the line-core region,by adopting the simplified Baranger model,the line-width and line-shift rates are determined,and their variation law with temperature is *** published data were found to compare these results with.

关键词： pressure broadening line-core broadening far-wing spectra photoabsorption

HARmONIC, SUBHARmONIC, SUPERHARmONIC, SImULTANEOUS SUB/SUPER HARmONIC AND COmBINATION RESONANCES Of SELf-EXCITED TWO COUPLED SECOND ORDER SYSTEmS TO mULTI-fREQUENCY EXCITATION

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Acta mechanica Sinica 1993年第1期9卷 61-71页

作者： A.m.Elnaggar A.f.El-Basyouny mathematics Department Faculty of ScienceBenha Egypt

Harmonic, subharmonic, superharmonic, simultaneous sub/super harmonic, and combination resonances of the additive type of self-excited two coupled-second order systems to multi-frequency excitation are investigated. The theoretical results are obtained by the multiple-scales method. The steady state amplitudes for each resonance are plotted, showing the influence of the different parameters. Analysis for each figure is given. Approximate solution corresponding to each type of resonance is determined. Stability analyses are carried out for each case.

关键词： resonance nonlinear oscillation multiple-scales method self-excited system multi-frequency excitation

Risk reduction in Sechahun iron ore deposit by geological boundary modification using multiple indicator Kriging

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Journal of Central South University 2014年第5期21卷 2011-2017页

作者： S.Kasmaee f.m.Torab Department of mining and metallurgical Engineering Iranian Iron Ore Research Center(IORC)Yazd University Department of mining and metallurgical Engineering Yazd University

Uncertainty on the geological contacts and the block volumes of the models along boundaries is often a major part of the global uncertainty of reserve *** work introduces a geostatistical technique that has been developed and tested in an iron ore deposit at Bafq mining district,in central Iran,and that,based on a probability criterion,helps to objectively model the geometry of this iron ore *** main problem in reserve estimation of this ore body is its geometrical modeling and uncertainty in geological *** work deals with the geostatistical method of multiple indicator kriging,which is used to determine the real boundaries of ore body in different *** approach has potential to improve project performance and decrease operational *** this purpose,the ore body is separated into two categories including rich iron zone(w(fe)>45%)and poor iron zone(20%fe)ficantly benefits to decrease the risk of reserve evaluation in the *** case study also highlights the value of multiple indicator kriging as a tool for estimates the position of grade boundaries within the *** of the resultant probability maps with the real ore/waste contacts on the extracted levels shows that the first indicator model could separate the whole ore body(poor plus rich)from the waste zone by probability of more than 0.35,which concludes the total reserve of 53 million *** second indicator model applied to separate the rich and poor domains and the results show that the blocks with the estimated probability of equal to or more than 0.4 lay within the rich ore zone consisting of 15.8 million tons reserve.

关键词： geological boundaries multiple indicator kriging risk assessment block model uncertainty Sechahun deposit

Legal considerations for urban underground space development in malaysia

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Underground Space 2017年第4期2卷 234-245页

作者： f.Zaini K.Hussin m.m.Raid faculty of Social Science Universiti Malaysia Sarawak94300 Kota SamarahanSarawakMalaysia faculty of Geoinft ormation cand Real Estate Universiti Teknologi Malaysia81310 SkudaiJohorMalaysia

In 2008,the malaysia land code,named the National Land Code 1965(NLC 1965),was amended to add Part five(A)to deal with the disposal of underground *** addition,the Circular of the Director General of Lands and mines No.1/2008 was issued to assist the application of Part five(A)of the NLC ***,the legislation is still questiona ble and has instigated many arguments among numerous ***,this research was undertaken to examine legal considerations for the development of underground *** focus is on four legal considerations,namely underground space ownership,the bundle of rights,depth,and underground space *** in qualitative methods,interviews were conducted with respondents involved in the development of under-ground space in *** obtained data were then analyzed *** findings diferentiated the rights of landowners for surface land and underground space,and their liability for damages and the *** was indicated that the current legislation in malaysia,namely Part five(A)of the NLC 1965 and the Circular of the Director General of Lands and mines No.1/2008,is adequate to facilitate the development of underground space in terms of legal ***,to further facilitate the development of underground land in the future,based on the research,four enhancements are recommended for legal considera tions pertaining to the development of underground space in m alaysia.

关键词： Underground space Legal consideration Land right Urban development

magnetic interaction in the metamaterial/magnet system

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Chinese Physics B 2014年第8期23卷 537-539页

作者： m.K.Alqadi f.Y.Alzoubi Department of Physics Jordan University of Science and Technology

The stability of the magnetic dipole and the metamaterial with negative permeability are investigated. Analytical expressions of the interaction force and stiffness of the magnetic line and metamaterial with negative permeability are derived. The repulsive force between the magnetic line and the metamaterial exceeds the value of the maximum force in the magnet-superconductor system.

关键词： metamaterial interaction energy negative permeability

Plasma and Gaseous Nitrocarburizing of C60W Steel for Tribological Applications

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材料热处理学报 2004年第5期25卷 338-342页

作者： m. mirjani f. Ashrafizadeh A. Shafyei Iranian Surface Research & Engineering Centre (ISREC) Isfahan Iran Dept. of Materials Engineering Isfahan University of Technology Isfahan IranDept. of Materials Engineering Isfahan University of Technology Isfahan Iran.

A comparison has been made between plasma and gas nitrocarburizing processes for C60W steel in terms of structural features of the layers and the tribological properties of the specimens. Gaseous treatments were performed in a sealed quench industrial furnace in optimized process cycles. for plasma nitrocarburizing, a semi - industrial size unit was operated at a range of process parameters. Experimental results indicate that increasing the treatment time increases the thickness of the compound layer but lowers the wear resistance. Plasma treatment produced a more effective case depth compared with gaseous process, providing a better uniformity. Analysis of X-ray diffraction patterns indicated that the compound layer in gas nitrocarburizing consisted of both e and y’ phases, whereas in plasma nitrocarburizing the e phase was not detected.

关键词： C60W钢等离子氮碳共渗气态氮碳共渗摩擦学

Electron Acceleration by microwave Radiation Inside a Rectangular Waveguide

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Plasma Science and Technology 2011年第3期13卷 357-361页

作者： B. f. mOHAmED A.m. GOUDA Plasma Physics Department N.R.C. Atomic Energy Authority Cairo Egypt

Electron dynamics in the fields associated with a transverse magnetic （Tm） wave propagating inside a rectangular waveguide is analytically studied. The relativistic momentum and energy equations for an electron are solved, which was injected initially along the propagation direction of the microwave. Expressions of the acceleration gradient and deflection angle are obtained. In principle, it is shown that the electron can be accelerated in this condition and there is no deflection when the electron is injected from the centre of the waveguide front. However, it is found that the acceleration gradient and deflection angle depend strongly on the parameters of the microwave （intensity, frequency, etc.） and the dimensions of the waveguide.

关键词： waveguide electron acceleration polarized microwave