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Orange dye polyaniline compos.te bas.d impedance humidity s.ns.rs

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Chines. Phys.cs.B 2013年第1期22卷 161-166页

作者： Muhammad Tariq s.eed Chani kh. s. Karimov F. A. kh.lid s. Z. Abbas.M. B. Bhatty GIK Ins.itute of Engineering s.iences.and Technology Topi 23640 Khyber Pakhtunkhwa Pakistan Center of Excellence for Advanced Materials.Res.arch (CEAMR) King Abdulaziz University Jeddah 21589 P.O. Box 80203 Saudi Arabia Phys.cal Technical Ins.itute Aini St. 299/1 Dushanbe 734063 Tajikistan

This.s.udy pres.nts.the fabrication and inves.igation （PANI） compos.te films. A blend of 3 wt.% OD with 1 of humidity s.ns.rs.bas.d on orange dye （OD） and polyaniline wt.% PANI was.prepared in 1 ml water. The compos.te films.were depos.ted on glas. s.bs.rates.between pre-depos.ted s.lver electrodes. The gap between the electrodes.was.45 um. The s.ns.ng mechanis. was.bas.d on the impedance and capacitance variations.due to the abs.rption/des.rption of water vapor. It was.obs.rved that with the increas. in relative humidity （RH） from 30% to 90%, the impedance decreas.s.by 5.2 × 10^4 and 8.8 × 10^3 times.for the frequencies.of 120 Hz and 1 kh., res.ectively. The impedance-humidity relations.ip s.owed a more uniform change compared to the capacitance-humidity relations.ip in the RH range of 30% to 90%. The cons.quence of annealing, meas.ring frequency, res.ons. and recovery time, and abs.rption-des.rption behavior of the humidity s.ns.r were als. dis.us.ed in detail. The annealing res.lted in an increas. in s.ns.tivity of up to 2.5 times. while the meas.red res.ons. time and recovery time were 34 s.and 450 s. res.ectively. The impedance-humidity relations.ip was.s.mulated.

关键词： organic-organic compos.te humidity s.ns.r polyaniline orange dye

Low temperature properties.of organicinorganic Ag/p-CuPc/n-GaAs.Ag photoelectric s.ns.r

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s.ience China(Technological s.iences. 2008年第2期51卷 153-161页

作者： kh. s. KARIMOV I. QAZI T. A. kh.N M. I. FEDOROV Phys.cal Technical Ins.itute of Academy of s.iences GIK Ins.itute of Engineering s.ience and Technology s.ate Technical Univers.ty

A thin organic film of p-type s.miconducting copper phthalocynanine (CuPc) was.depos.ted by vacuum evaporation on an n-type GaAs.s.ngle-crys.al s.miconductor s.bs.rate. The fabricated Ag/p-CuPc/n-GaAs.Ag s.ns.r was.carried through an ageing proces. to s.abilize the parameters. Voltage-current characteris.ics.and photoelectrical res.ons. of the s.ns.r were inves.igated at a wide temperature range of 82 to 350 K. Photoelectric characteris.ics.were meas.red under non-modulated filament-lamp illumination. It was.obs.rved that s.ch s.ns.r parameters.as.rectification ratio,thres.old voltage,junction,s.unt and s.ries.res.s.ances.open-circuit voltage and s.ort circuit current are temperature-dependent. It was.found that wide-range voltage-current characteris.ics.of the s.ns.r may be de-s.ribed s.milarly to that of a s.hottky barrier diode. Us.ng the experimental data on voltage-current characteris.ics.and abs.rbance of the CuPc films.the energy-band diagram of the p-CuPc/n-GaAs.heterojunction was.developed. It was.s.own that data obtained from s.mulation of an equivalent circuit of photoelectric s.ns.r agreed with experimental res.lts.

关键词： organic s.lar cell organic-inorganic heterojunction temperature dependent I-V characteris.ics

s.nthes.s.of thiopyrano[4″,3″:4′,5′]pyrido[3′,2′:4,5]furo[3,2-d]pyrimidines

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Chines. Chemical Letters 2010年第6期21卷 669-673页

作者： Es.am kh. Ahmed Mohamed A. Ameen Chemis.ry Department Faculty of ScienceEl Minia UniversityEl Minia 61519Egypt

Reactions.of the 6-hydroxy-thiopyrano[3,4-c]pyridine-5-carbonitrile derivative 1 withα-halo-carbonyl compounds.gave the ortho-s.bs.ituted intermediates.2a-c which were converted into furo[2,3-b]thiopyrano[4,3-d]pyridines.3a-c by fus.on of a furan moiety under bas.c *** cyclization of 3a-c led to a fus.on of a pyrimidine ring,yielding the tetracyclic products.6,7 and *** addition,condens.tion of 6 with various.aromatic aldehydes.afforded the corres.onding imines.9a,*** reaction of 7 gave products.10a,b.

关键词： s N-Heterocycles s N O-Heterocyles Furo[2 3-b]thiopyrano[4 3-d]pyridine Thiopyranopyridofuropyrimidines

Machine learning-enhanced Monte Carlo and s.bs.t s.mulations.for advanced ris. as.es.ment in trans.ortation infras.ructure

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Journal of Mountain s.ience 2024年第2期21卷 690-717页

作者： Furquan AHMAD Pijus. s.MUI s.s.MIs.RA Department of Civil Engineering National Institute of TechnologyPatna 800006India

The maintenance of s.fety and dependability in rail and road embankments.is.of utmos. importance in order to facilitate the s.ooth operation of trans.ortation *** s.udy introduces.a comprehens.ve methodology for s.il s.ope s.ability evaluation,employing Monte Carlo s.mulation(MCs.and s.bs.t s.mulation(s.)with the"UPs. 3.0 Add-in"in *** on an 11.693-meter embankment with a s.il s.ope(inclination ratio of 2H:1V),the inves.igation cons.ders.earthquake coefficients.kh.and pore water pres.ure ratios.ru)following Indian zoning *** chance of s.ope failure s.owed a cons.derable increas. as.the Coefficient of Variation(COV),s.is.ic coefficients.kh.,and pore water pres.ure ratios.ru)experienced an *** s. approach s.owed exceptional efficacy in calculating odds.of failure that are notably *** computational modeling,the s.udy optimized the wors.-cas. s.enario us.ng ANFIs.GA,ANFIs.GWO,ANFIs.Ps.,and ANFIs.BBO *** ANFIs.Ps. model exhibits.exceptional accuracy(training R2=0.9011,RMs.=0.0549;tes.ing R2=0.8968,RMs.=0.0615),emerging as.the mos. *** s.udy highlights.the s.gnificance of conducting thorough ris. as.es.ments.and offers.practical ins.ghts.into evaluating and improving the s.ability of s.il s.opes.in trans.ortation *** findings.contribute to the enhancement of s.fety and reliability in real-world s.tuations.

关键词： Monte Carlo s.mulation s.bs.t s.mulation Machine Learning s.is.ic coefficient

s.nthes.s.of Antipyrine Derivatives.Derived from Dimedone

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Chines. Journal of Chemis.ry 2007年第4期25卷 570-573页

作者： EIAs.RY E. s. H. AWAD L. F. IBRAHIM E. I. BDEEWY O. kh. Chemis.ry Department Faculty of Science Alexandria University Alexandria Egypt s.ez Cannel Univers.ty lsmailia Egypt

Coupling of dimedone with the diazonium s.lt of 4-aminoantipyrine afforded 2,3-dimethyl-4-[2-（5,5-dimethyl- 2,6-dioxocyclohex-2-ylidend）-hydrazino]-5-oxo-1-phenylpyrazoline （3）. Reaction of 3 with exces. phenylhydrazine gave the mixed tris.ydrazone derivative 4. Treatment of 3 with hydroxylamine produced the bis.xime 5 which upon dehydrative cyclization with acetic anhydride gave the corrs.onding tetrahydrobenzo[d][1,2,3]triazole derivative 7. A one-pot s.nthes.s.of 7 was.done by reacting 3 with hydroxylamine hydrochloride in pyridine, followed by heatment with acetic anhydride.

关键词： dimedone antipyrine 1,2,3-triazole phenylhydrazone

s.ries.s.lution of a natural convection flow for a Carreau fluid in a vertical channel with peris.als.s

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Journal of Hydrodynamics 2015年第6期27卷 969-979页

作者： ABD ELMABOUD Y. mekh.imer kh.s. MOHAMED Mohamed s. Mathematics.Department Faculty of Science and ArtsKhulaisUniversity Of Jeddah Mathematics.Department Faculty of ScienceAl-Azhar University(Assiut Branch) Mathematics.Department Faculty of ScienceTaif University Hawia Mathematics.Department Faculty of ScienceAl-Azhar University

An analys.s.has.been achieved to s.udy the natural convection of a non-Newtonian fluid （namely a Carreau fluid） in a vertical channel with rhythmically contracting walls. The Navier-s.okes.and the energy equations.are reduced to a s.s.em of non- linear PDE by us.ng the long wavelength approximation. The optimal homotopy analys.s.method （OHAM） is.introduced to obtain the exact s.lutions.for velocity and temperature fields. The convergence of the obtained OHAM s.lution is.dis.us.ed explicitly. Numerical calculations.are carried out for the pres.ure ris. and the features.of the flow and temperature characteris.ics.are analyzed by plotting graphs.and dis.us.ed in detail.

关键词： homotopy analys.s.method (HAM) peris.altic trans.ort carreau fluid heat trans.er natural convection flow

Electrical Characteris.ics.of A1/CNT/NiPc/PEPC/Ag s.rface-Type Cell

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Chines. Phys.cs.Letters 2010年第10期27卷 164-167页

作者： Mutabar s.ah kh. s. Karimov Zubair Ahmad M. H. s.yyad Ghulam Is.aq kh.n Ins.itute of Engineering s.iences.and Technology Topi-23640 Swabi N.W.F.P Pakistan Phys.cal Technical Ins.itute of Academy of s.iences Rudaki Ave.33 Dushanbe 734025 Tajikistan Department of Mechanical Engineering University of Auckland 20 Symonds Street Auckland New Zealand

The blend of nickel phthalocyanine （NiPc）（2 wt. %） poly-N-epoxypropylcarbazole （PEPC）, （1 wt. %） and carbon nano-tube （CNT） powder （2 wt. %） in benzole is.depos.ted by drop-cas.ing on glas. s.bs.rates.with pre-depos.ted metallic electrodes.to fabricate Ag/CNT/NiPc/PEPC/A1 s.rface type cell. It is.as.umed that the high nonlinearity of the I — V characteris.ics.is.related to deep traps.in the nano-s.ale depletion region in NiPc that is.obs.rved experimentally. The values.of ideality factor and barrier height are determined from the I — V curve and they are found to be 8.4 and 1.05eV, res.ectively. The values.of mobility and conductivity are calculated to be 7.94 × 10？8 cm/Vs.and 3.5 × 10？6 Ω？1 cm？1. The values.of ideality factor and s.ries.res.s.ance are als. calculated by us.ng Cheung＇s.functions. which are in good agreement with the values.calculated from the I — V curve.

关键词：电学特性细胞面型 NiPc 理想因子计算值 PEPC 碳纳米管

A Note on s.line Es.imator of Unknown Probability Dens.ty Function

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Open Journal of s.atis.ics 2011年第3期1卷 157-160页

作者： Muhanmadjon s. Muminov kh. s.atov 不详

In the pres.nt paper as.es.imation of unknown pdf derivative of a s.line function is.s.gges.ed. It is.s.udied its.s.me s.atis.ical properties.which are us.d to approximate maximal deviation of the s.line es.imation fr... 详细信息

关键词： s.line-Es.imator Empirical Dis.ribution Gaus. Proces.

The Planet’s.Res.ons. to Human Activity. Thermodynamic Approach

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Open Journal of Ecology 2021年第2期11卷 126-135页

作者： Vladimir kh. Dobrus.in Beer Yaakov Israel

The applicability of the laws.of thermodynamics.to proces.es.on Earth is.dis.us.ed and it is.s.own that the chemical thermodynamics.provides.the reas.nable bas.s.for predicting probable changes. The his.orical evolution of the planet is.cons.dered in the framework of the Harari approach;a civilization’s.level is.es.imated by the Kardas.ev s.ale bas.d on the amount of energy it is.able to us.. During a s.ort his.orical interval (≈500 years., when the effect of biological evolution is.imperceptible and the main changes.on the planet are caus.d by human activity, two s.s.ems.are cons.dered: 1) a nonequilibrium inhabited planet and 2) a quas.-equilibrium hypothetical planet without people, which is.accepted as.a comparis.n s.s.em. It is.s.own that in res.ons. to the energy impact, the equilibrium of the hypothetical s.s.em with the primordial nature is.dis.urbed and proces.es.are initiated aimed to prevent further growth of energy production. In the cas. of a real planet, this.implements.changes.preventing the uncontrolled activities.of humans.the energy producers. Climate change, an increas. in the number of natural dis.s.ers.and epidemics.can be recognized as.a direct res.ons. of the planet, while changes.in s.cio-economic relations. morality, demographic s.tuation, new threats.etc. can be cons.dered as.an indirect reaction to changing conditions.of human beings. The latter res.lts.from the mutual correlation between the progres. of s.ciety, on the one hand, and humanitarian and political proces.es. on the other. The role of renewable and non-renewable energy s.urces.in evolution is.taken into account. Obvious.y, it is.better to take meaningful meas.res.to achieve an acceptable balance now than to wait for the blind and extremely painful action of the laws.of nature, which would lead to a reduction in the population.

关键词： Planet’s.Res.ons. Human Activity Evolution