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KOH@NaX酸碱性调控及对甲苯甲醇侧链烷基化性能的影响

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石油学报（石油加工） 2022年第4期38卷 771-780页

作者：刘钰华王斌温月丽 ahmad faraz 刘文龙黄伟太原理工大学省部共建煤基能源清洁高效利用国家重点实验室山西太原030024 太原理工大学环境科学工程学院山西太原030024 太原理工大学山西太原理工煤转化技术工程有限公司山西太原030024

通过固-液连续混加法制备了KOH改性的NaX系列催化剂,并采用X射线衍射(XRD)、N_(2)物理吸附-脱附、傅里叶红外光谱(FT-IR)、扫描电子显微镜(SEM)、X射线能谱(SEM-EDS-Mapping)、CO_(2)-TPD、NH_(3)-TPD等表征手段对其进行分析,考察KOH改... 详细信息

通过固-液连续混加法制备了KOH改性的NaX系列催化剂,并采用X射线衍射(XRD)、N_(2)物理吸附-脱附、傅里叶红外光谱(FT-IR)、扫描电子显微镜(SEM)、X射线能谱(SEM-EDS-Mapping)、CO_(2)-TPD、NH_(3)-TPD等表征手段对其进行分析,考察KOH改性的NaX系列催化剂在甲苯甲醇侧链烷基化反应中的催化性能。结果表明:KOH的均匀负载有利于增加NaX分子筛上强碱性位,同时抑制了中强酸性位;显著提高了甲醇转化率和苯乙烯与乙苯的总选择性,同时降低了甲烷和二甲苯的总选择性。在常压、425℃、质量空速1.0 h^(-1)、甲苯/甲醇摩尔比为5的条件下,当KOH的负载质量分数为7%时,甲醇转化率、苯乙烯和乙苯的总收率分别为99.81%和97.82%。通过对甲苯甲醇侧链烷基化反应机理的研究发现,甲醇在强碱性位和中强酸性位上存在一对竞争反应:甲醇在强碱性位上脱氢生成甲醛,进而与被活化的甲苯上的甲基反应生成苯乙烯和乙苯;而在中强酸性位上甲醇既可以加氢生成甲烷,也可以与甲苯发生苯环烷基化反应生成二甲苯。

关键词：酸碱性调控甲苯甲醇侧链烷基化 KOH@NaX催化剂乙苯选择性

Synthesis of HTLcs modified by K_(3)PO_(4) for side chain alkylation of toluene with methanol

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Green Energy & Environment 2021年第6期6卷 961-967页

作者： Chunyao Hao Yueli Wen Bin Wang faraz ahmad Yuhua Liu Huijun Li Wei Huang Key Laboratory of Coal Science and Technology(Taiyuan University of Technology) Ministry of Education and Shanxi ProvinceTaiyuan030024ShanxiChina College of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuanShanxi030024China Coal Conversion Technology&Engineering Co. LtdTaiyuan University of TechnologyTaiyuanShanxi030024China

A series of calcined HTLcs catalysts were prepared and modified with potassium phosphate by impregnation method to clarify the influence of catalyst alkalinity on the side chain alkylation of toluene with methanol for synthesis of ethylbenzene and *** catalysts were characterized by X-ray diffraction(XRD),N_(2)physical adsorption-desorption,Fourier-transform infrared spectroscopy(FT-IR),Scanning electron microscopy(SEM),X-ray photoelectron spectrometry(XPS),NH_(3)temperature-programmed desorption(NH_(3)-TPD)and CO_(2)temperature-programmed desorption(CO_(2)-TPD).It was found that the selectivity of styrene was highest(39.25%)when the K_(3)PO_(4)loading was 7.5 wt%.And the total yield of styrene and ethylbenzene could reach 65.08%with 10 wt%K_(3)PO_(4)*** might due to the fact that the addition of K_(3)PO_(4)could adjust the acid and basic sites of *** addition,appropriate strength and amount of basic sites were favorable to producing more styrene.

关键词： Toluene alkylation Styrene Hydrotalcite-like compounds(HTLcs) Potassium phosphate

Zinc oxide nanoparticles and epibrassinolide enhanced growth of tomato via modulating antioxidant activity and photosynthetic performance

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BIOCELL 2021年第4期45卷 1081-1093页

作者： MOHAMMAD FAIZAN ahmad faraz SHAMSUL HAYAT JAVAID ABHAT FANGYUAN YU Collaborative Innovation Center of Sustainable Forestry in Southern China College of Forest ScienceNanjing Forestry UniversityNanjing210037China School of Life Sciences Glocal UniversitySaharanpur247121India Plant Physiology Laboratory Department of BotanyFaculty of Life SciencesAligarh Muslim UniversityAligarh202002India State Key Laboratory for Crop Genetics and Germplasm Enhancement College of AgricultureNanjing Agricultural UniversityNanjing210095China

Nanotechnology has greatly expanded the applications of nanoparticles(NPs)domain in the scientific *** this context,the zinc oxide nanoparticles(ZnO-NPs)and 24-epibrassinolide(EBL)has been revealed to positively regulate plant metabolism and *** the present study,we investigated the role of ZnO-NPs and EBL in the regulation of plant growth,photosynthetic efficiency,enzymes activities and fruit yield in *** treatment of ZnO-NPs at three levels(10,50 or 100 ppm)and EBL(10^(−8) M)were applied separately or in combination to the foliage of plant at 35-39 days after sowing(DAS);and the control plants were treated with double distilled water(DDW)only at the same time *** different tested concentrations of ZnO-NPs and/or EBL,the combined spray of 50 ppm of ZnO-NPs and 10^(−8) M of EBL proved to be best,and considerably increased the growth,photosynthetic efficiency,biochemical enzymes activities as well as fruit ***,the performance of the antioxidant enzymes viz catalase,peroxidase and superoxide dismutase were also increased after the combined application of ZnO-NPs and EBL in Lycopersicon ***,it is suggested that combined application of 50 ppm of ZnO-NPs and 10−8 M of EBL is the best combination can be applied to increase the performance and yield of ***.

关键词： Antioxidant enzymes 24-epibrassinolide Lycopersicon esculentum Zinc oxide nanoparticles

P-Al/NaX催化剂的合成及其甲苯甲醇侧链烷基化制苯乙烯性能研究

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天然气化工—C1化学与化工 2022年第5期47卷 64-71页

作者：刘文龙温月丽王斌 ahmad faraz 李承达黄伟太原理工大学省部共建煤基能源清洁高效利用国家重点实验室山西太原030024 太原理工大学环境科学与工程学院山西太原030024 太原理工大学山西太原理工煤转化技术工程有限公司山西太原030024

为了提高催化剂在甲苯甲醇侧链烷基化制苯乙烯反应中的稳定性及苯乙烯选择性,采用水热法合成了不同P、Al含量(物质的量)的P-Al/NaX催化剂,并负载质量分数为9%的NaOH,探究了该系列催化剂在甲苯甲醇侧链烷基化中的催化性能。结合X射线衍射... 详细信息

为了提高催化剂在甲苯甲醇侧链烷基化制苯乙烯反应中的稳定性及苯乙烯选择性,采用水热法合成了不同P、Al含量(物质的量)的P-Al/NaX催化剂,并负载质量分数为9%的NaOH,探究了该系列催化剂在甲苯甲醇侧链烷基化中的催化性能。结合X射线衍射(XRD)、CO_(2)-TPD和NH_(3)-TPD等表征结果和催化活性数据发现,水热法合成的含有磷铝硅酸盐Na_(13)Al_(24)Si_(13)P_(11)O_(96)·H_(2)O 结构的P-Al/NaX催化剂表现出高的苯乙烯选择性,其中Cat-3-9Na催化剂的乙苯和苯乙烯总收率达到73.57%,苯乙烯选择性达到28.18%。通过催化剂连续反应6天的活性数据发现,该系列催化剂表现出良好的稳定性。

关键词： P-Al/NaX 水热法酸碱性位侧链烷基化苯乙烯

Mental health problems due to community violence exposure in a small urban setting

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Family Medicine and Community Health 2017年第3期5卷 170-178页

作者： faraz ahmad Jim Medder Jenenne Geske Jannette Taylor Ruth Margalit Mental health problems due to community violence exposure in a small urban setting UNMC Dept.of Family Medicine 983075 Nebraska Medical CenterOmahaNE 68198-3075USA UNMC College of Medicine 985520 Nebraska Medical CenterOmahaNE 68198-5520USA Creighton University School of Law2500 California PlazaOmahaNE 68178USA UNMC College of Public Health 984355 Medical CenterOmahaNE 68198-4355USA

Objective:Studies conducted in large metropolitan inner-city communities with high violent crime rates have demonstrated an association between exposure to violence and mental health problems;therefore the purpose of this study was to determine if similar trends exist in smaller inner-city communities with substantially lower violent crime ***:One hundred twenty-six children and young adults living in inner-city Omaha,Nebraska,were screened for posttraumatic stress disorder(PTSD),depression,and anxiety symptoms and assessed for community violence exposure(CVE).Pearson’s correlation and analysis of variance were used to determine the relationship between PTSD,depression,and anxiety symptoms and ***:A statistically significant relationship was found between CVE and PTSD and anxiety symptoms among participants despite their having lower rates of exposure to violent events in com-parison with other *** association was found between violence and depression ***,the presence of anxiety and depression,as well as increased age of participants,was associated with higher rates of PTSD ***:We recommend that health care providers in smaller cities,where the effects of violent crime may be underestimated or overlooked,be informed of the existence of this pub-lic health problem within their community and that they screen at-risk patients for mental health problems.

关键词： Community violence inner city posttraumatic stress disorder depression anxiety

Electronic and thermoelectric properties of YbMg_(2)X_(2)(X=P,As,Sb,Bi)zintl compounds by first-principles method

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Journal of Rare Earths 2024年第1期42卷 147-154,I0006页

作者： Sajid Khan Dil faraz Khan R.Neffati Tariq Usman Muhammad Waqar Ahsraf Shamim Khan Saeed Ullah Jan G.Murtaza Department of Physics University of Science&Technology BannuBannu28100Pakistan Department of Physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Laboratoire de Physique de La Matiere Condensee Departement de PhysiqueFaculte des Sciences de TunisUniversite Tunis El ManarCampus Universitaire1060TunisTunisia Department of Physics Shaoxing UniversityShaoxing312000China Department of Mathematics&Natural Sciences Prince Mohammad Bin Fahd UniversityAlkhobar31952Saudi Arabia Materials Modeling Lab Department of PhysicsIslamia College Peshawar25120KhyberPakhtunkhwaPakistan

In this work the structural,electronic and thermoelectric properties of YbMg_(2)X_(2)(X=P,As,Sb,Bi)zintl compounds were investigated comprehensively using first principles *** electronic properties were studied using PBE GGA,TB-mBJ and hybrid(YS-PBE0)*** the structural parameters of optimized structures are in harmonious agreement to the available *** band structure study illustrates that the titled materials manifest metallic and semi metallic nature using PBE and TB-mBJ potentials while they show wide band gap semiconducting behavior by following hybrid(YS-PBE0)*** density of states(TDOS)and partial density of states(PDOS)were also calculated to glimpse the contribution of orbitals of atoms in the formation of *** properties were studied by using BoltzTraP2 code employed to *** get enormous values of Seebeck coefficient(S),power factor(PF)and thermoelectric figure of merit(ZT)for all the samples YbMg_(2)X_(2)(X=P,As,Sb,Bi),Moreover,the overwhelming transport properties for the titled compounds indicate the optimum level of carriers’concentration which pinpoints these materials to be better thermoelectrics in the 1-2-2 zintl family.

关键词： Zintl compounds Hybrid functional Band structure Thermoelectrics Rare earths

Speaker Recognition with Emotional Speech

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Speaker Recognition with Emotional Speech

作者： ahmad faraz Hussain 华南理工大学

学位级别：硕士

An integrative technology,Speaker recognition manipulates vocal features of speakers to infer information about their *** is the biometric branch that is used for identification,verification and categorization of particular speakers,with the ability of detection,tracing and partition by *** recognition is the only biometry that is simply checked（verified/identified）remote via the existing infrastructures *** network and phone *** makes recognition of speakers very important and with the increasing number and complexity of cellular（mobile）telephones,recognition of speakers will become more popular in the *** recognition can be potentially applied to many applications like access control,transaction authorization over mobile phone and identification of forensic suspect by his/her *** biometrics require special acquisition hardware but speaker recognition needs only a *** the fact that speaker recognition research has been ongoing for extra than four decades,the performance of speaker recognition is effected by person health,age,background noise and the speaker emotional *** as to build an emotional speaker recognition system,this paper uses Kaldi GMM-I-vector Toolkit to design an emotional speaker recognition that is tested in clear and noisy *** main work and contribution of this article are the following:*** recognition of speaker’s field,I-Vector has being proved to be very efficient because of it fixed length and low dimensional feature vector.I-Vector approach will be used for emotional speaker recognition on text-dependent database in clear and noisy *** databases contains six different emotions like sad,angry,fear,happy,neutral and *** offer CMVNs（cepstral mean variance normalization）,use to better normalization of MFCC *** for the testing and training system,the Gaussian Mixture Models are *** channel/session compensation

关键词：情感语音说话人识别参数匹配特征提取

Sickle Injury to Brain

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Open Journal of Modern Neurosurgery 2015年第1期5卷 23-26页

作者： Mubashshir Ali Apoorva Kumar Osman Musa Hingora faraz ahmad Department of Surgery Era’s Lucknow Medical College Lucknow India

We reported a case of a 12-year-old girl child with an uncommon intracranial metallic foreign body who was hit by her younger sister with sickle that got stuck to skull. Patient presented to us with stuck sickle in her head and was fully conscious with complaint of headache. She was very much afraid of her injury and was screaming with pain and fear. There was no neurological weakness. Computed tomography scan revealed that metallic foreign body was located adjacent to the confluence of major sinuses posteriorly on her skull. The location and position of foreign body suggested that it was of low velocity, and was hit from pointed end of sickle. It was taken out after doing craniectomy all around the sickle point and dural tear was repaired with pericranium. The postoperative course was uneventful.

关键词： Brain Foreign Body Sickle Head Injury

Evaluation of CRU TS, GPCC, AgMERRA, and AgCFSR meteorological datasets for estimating climate and crop variables: A case study of maize in Qazvin Province, Iran

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Journal of Arid Land 2022年第12期14卷 1361-1376页

作者： faraz GORGIN PAVEH Hadi RAMEZANI ETEDALI Brian COLLINS Syracuse University Syracuse 13244USA Imam Khomeini International University Qazvin 34149-16818Iran Centre for Crop Science The University of QueenslandBrisbane 4072Australia

In the past few decades,meteorological datasets from remote sensing techniques in agricultural and water resources management have been used by various researchers and *** on the literature,meteorological datasets are not more accurate than synoptic stations,but their various advantages,such as spatial coverage,time coverage,accessibility,and free use,have made these techniques superior,and sometimes we can use them instead of synoptic *** this study,we used four meteorological datasets,including Climatic Research Unit gridded Time Series(CRU TS),Global Precipitation Climatology Centre(GPCC),Agricultural National Aeronautics and Space Administration Modern-Era Retrospective Analysis for Research and Applications(AgMERRA),Agricultural Climate Forecast System Reanalysis(AgCFSR),to estimate climate variables,i.e.,precipitation,maximum temperature,and minimum temperature,and crop variables,i.e.,reference evapotranspiration,irrigation requirement,biomass,and yield of maize,in Qazvin Province of Iran during *** first,data were gathered from the four meteorological datasets and synoptic station in this province,and climate variables were ***,after using the AquaCrop model to calculate the crop variables,we compared the results of the synoptic station and meteorological *** the four meteorological datasets showed strong performance for estimating climate *** and AgCFSR had more accurate estimations for precipitation and maximum ***,their normalized root mean square error was inferior to CRU for minimum ***,they were all very efficient for estimating the biomass and yield of maize in this *** reference evapotranspiration and irrigation requirement CRU TS and GPCC were the most efficient rather than AgMERRA and *** for the estimation of biomass and yield,all the four meteorological datasets were *** sum up,GPCC and AgCFSR were the two best datasets in thi

关键词： climate variables crop variables meteorological datasets precipitation reference evapotranspiration irrigation requirement Iran