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辽东半岛复州湾剖面寒武系第二统光合作用生物膜建造的核形石

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古地理学报 2019年第1期21卷 31-48页

作者：梅冥相 muhammad riaz 刘丽孟庆芬中国地质大学(北京)地球科学与资源学院北京100083 中国地质大学(北京)生物地质与环境地质国家重点实验室北京100083

作为一种经常大于鲕粒的包覆颗粒类型,核形石以其不平滑的圈层被解释为微生物成因,区别于成因存在较大争议的鲕粒,而且常与鲕粒和其他类型的碳酸盐颗粒相互共生;作为一种在围绕着生物碎屑和非生物碎屑核心的序列式纹层化作用过程中形成... 详细信息

作为一种经常大于鲕粒的包覆颗粒类型,核形石以其不平滑的圈层被解释为微生物成因,区别于成因存在较大争议的鲕粒,而且常与鲕粒和其他类型的碳酸盐颗粒相互共生;作为一种在围绕着生物碎屑和非生物碎屑核心的序列式纹层化作用过程中形成的球形或假球型生物沉积构造,核形石还常常单独产出和分布,所以又被解释为微生物碳酸盐岩,或者被归为球状叠层石。在辽东半岛寒武系第二统碱厂组和馒头组之中,厘米级别大小的核形石密集发育在三级层序的顶部,成为一种时间特化的相。另外,以下重要特征将辽东半岛寒武系第二统的核形石特征化,包括:(1)与凝块和微凝块共生;(2)多为球状和椭球状;(3)由不均一的非纹层状致密泥晶和微亮晶构成;(4)核形石皮层以及核形石间凝块中发育特别的蓝细菌鞘钙化化石等。尽管穿越成岩作用过滤器去解释古代核形石复杂的形成机理存在着巨大的挑战,也尽管形成这些核形石的复杂生物膜钙化作用细节需要更加深入地研究才能得到更好地了解,但是,辽东半岛第二统碱厂组和馒头组核形石中直接的微生物化石证据,尤其是核形石内较为丰富的钙化蓝细菌鞘化石,使其成为一个了解光合作用生物膜建造核形石的典型实例。

关键词：核形石光合作用生物膜寒武系第二统复州湾剖面辽东半岛

Design and Development of Low-cost Wearable Electroencephalograms (EEG) Headset

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Intelligent Automation & Soft Computing 2023年第3期35卷 2821-2835页

作者： riaz muhammad Ahmed Ali M.Abid Anwar Toufique Ahmed Soomro Omar AlShorman Adel Alshahrani Mahmoud Masadeh Ghulam Md Ashraf Naif H.Ali muhammad Irfan Athanasios Alexiou Department of Electrical Engineering Sukkur IBA University65200SukkurPakistan Department of Electronic Engineering Quaid-e-Awam University of EngineeringScience and TechnologyLarkana77150Pakistan Faculty of Engineering and AlShrouk Trading Company Najran UniversityNajran61441Saudi Arabia Department of Medical Rehabilitation Sciences-Physiotherapy Program College of Applied Medical SciencesNajran UniversityNajran61441Saudi Arabia Computer Engineering Department Yarmouk UniversityIrbid21163Jordan Pre-Clinical Research Unit King Fahd Medical Research CenterKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Medical Laboratory Technology Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Internal Medicine Medical CollegeNajran UniversityNajran61441Saudi Arabia Electrical Engineering Department College of EngineeringNajran University Saudi ArabiaNajran61441Saudi Arabia Novel Global Community Educational Foundation HebershamNSW 2770AustraliaAFNP Med AustriaWien2770Austria

Electroencephalogram(EEG)is a method of capturing the electrophy-siological signal of the *** EEG headset is a wearable device that records electrophysiological data from the *** paper presents the design and fab-rication of a customized low-cost Electroencephalogram(EEG)headset based on the open-source OpenBCI Ultracortex Mark IV *** electrode placement locations are modiﬁed under a 10–20 standard *** fabricated headset is then compared to commercially available headsets based on the following para-meters:affordability,accessibility,noise,signal quality,and ***,the data is recorded from 20 subjects who used the EEG Headset,and signals were ***,the participants marked the accuracy,set up time,participant comfort,and participant perceived ease of set-up on a scale of 1 to 7(7 being excellent).Thirdly,the self-designed EEG headband is used by 5 participants for slide *** raw EEG signal is decomposed into a series of band sig-nals using discrete wavelet transform(DWT).Lastly,theseﬁndings have been compared to previously reported *** concluded that when used for slide-changing control,our self-designed EEG headband had an accuracy of 82.0 *** also concluded from the results that our headset performed well on the cost-effectiveness scale,had a reduced setup time of 2±0.5 min(the short-est among all being compared),and demonstrated greater ease of use.

关键词： Brain-computer interface EEG consumer-grade accessibility headset

Technical refinements of the modified central mound breast reduction

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Plastic and Aesthetic Research 2018年第9期5卷 1-11页

作者： Simon Nicholson muhammad Adil Abbas Khan muhammad riaz Hand Surgery Fellow Middlemore HospitalOtahuhuAuckland 2025New Zealand ST6 Registrar in plastic surgery NHS TaysideDundee DD2 1GZUK Hull and East Riding Hospital AnlabyKingston upon Hull HU10 7AZUK

Aim: Common pitfalls with existing breast reduction techniques include poor aesthetic outcome, such as development of a 'boxy' breast shape, and pseudoptosis. Presented here are a series of modifications to the technique of central mound breast reduction, based on previous work, aimed at ensuring consistent aesthetic results which are maintained in the long-term. Methods: All patients undergoing bilateral breast reduction by the senior author over a 7-year period were included, with outcome data collected prospectively. A detailed description of the technique is offered. Results: One hundred and sixteen patients underwent bilateral breast reduction over the study period. Mean follow-up was 20.6 months. There were no cases of nipple necrosis or infection requiring antibiotics. There was one post-operative haematoma which required surgical evacuation. Three patients developed a degree of fat necrosis which was managed conservatively in two, but required surgical debridement for liquefactive necrosis in one. Results of these breast reductions at the second post-operative year and beyond are presented. Conclusion: The technique described offers benefits of improved predictability, consistency and longevity of aesthetic results over existing techniques. Development of pseudoptosis in particular is effectively delayed. The modifications described have not been shown to increase the rates of surgical complications.

关键词： Central mound breast reduction mastopexy technique technical refinement modification

Frequency of otitis media with effusion among children aged 1-5 years presenting to immunization center of tertiary care hospitals,Rawalpindi

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2022年第4期8卷 315-320页

作者： Nida riaz muhammad Ajmal muhammad Sheharyar Khan Department of Otorhinolaryngology and Head and Neck Surgery Holy Family HospitalRawalpindiPakistan Department of Otorhinolaryngology and Head and Neck Surgery HBS Medical CollegeIslamabadPakistan Rawalpindi Medical University RawalpindiPakistan

Objective:We conducted this study to assess the etiopathogenic relation of otitis media with effusion(OME)in a group of children aged 1-5 years among the local population of ***:This was a cross-sectional retrospective *** was conducted among the children presenting to the immunization center of three tertiary care hospitals of *** media was assessed by clinical examination and tympanometry from August 2019 to January ***-factor regression analysis was then applied to recognize the statistical significance and association of various risk factors to ***:Out of 400 children enrolled in this study,108(27.0%)had OME,out of which 65(60.2%)were males and 30(27.8%)were of age group 2-3 *** regression analysis of risk factors associated with OME showed it was strongly associated with snoring(P<0.001),last year symptoms(attack of ear aches with hearing loss[P=0.002]),drugs(URTI antibiotics[P=0.026],All 3 drugs[P=0.013]).Conclusions:We found out that OME is a common disease which if not identified or treated timely can lead to other hard to cure health *** of its etiopathogenic factors can play a major role in its prevention.

关键词： Etiology Low resource country Otitis media with effusion Prevelance Tympanometry

A Spectral Characterization of the S-clique Extension of the Square Grid Graphs

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A Spectral Characterization of the S-clique Extension of the...

作者： muhammad riaz 中国科学技术大学

学位级别：硕士

This thesis focuses simultaneously on two problems in spectral graph theory,known as spectral characterization of graphs and characterization of distance regular graphs from their intersection *** particular,we show that any co-edge-regular graph which is cospectral with the s-clique extension of the t × t-grid is the s-clique extension of the t × t-grid,if t ≥ 11（S + 1）3（s + 2）,（s ≥ 2）.Gavrilyuk and Koolen used a weaker version of this result to show that the Grassmann graph Jq（2D,D）is determined by its intersection array as a distance-regular graph,if D＞20 and if q ≥ 9,then D＞*** thesis consist on four chapters and are organized as follows:In Chapter 1,we discuss the origin and motivation of our *** results are provided to understand its *** 2 focuses on defining all the necessary termi-nologies and *** important concepts such as interlacing,equitable partitions,clique extension of square grid graphs are *** upper bound on the order of a clique in a graph cospectral with the s-clique extension of the square grid graphs,say（?）,is *** Chapter 3,we present the proof of our *** 4 comprises conclusion and future work.

关键词： Co-edge-regular graph Eigenvalue Few eigenvalues Spectral characterization

Mineralogy and element geochemistry of the Sohnari rocks of Early Eocene Laki Formation in the Southern Indus Basin,Pakistan:Implications for paleoclimate,paleoweathering and paleoredox conditions

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能源地球科学(英文) 2023年第1期4卷 143-157页

作者： Asghar A.A.D.Hakro Sajjad Ali Abdul Shakoor Mastoi riaz Hussain Rajper Rizwan Sarwar Awan muhammad Soomar Samtio Hong Xiao Xiaolin Lu Centre for Pure&Applied Geology University of SindhJamshoro76080Pakistan Xinjiang Centre for Mineral Resources Xinjiang Institute of Ecology and GeographyUrumqiXinjiang830011China College of Geosciences China University of PetroleumBeijing102249China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China School of Resources and Environmental Engineering Hefei University of TechnologyHefei Anhui230009China

The Sohnari Member of the Early Eocene Laki Formation is massively deposited in the Southern Indus Basin of Pakistan and is considered a potential source rock to generate ***,the detailed paleoclimatic,paleoweathering,and depositional conditions of the Sohnari Member have not been studied *** research mainly discusses the detailed mineralogical(bulk and clay)and elemental geochemistry of the Laki Formation from two outcrop sections(Jhimpir and Lakhra)in the Southern Indus Basin,*** bulk minerals,including quartz(low),hematite,calcite,halite,gypsum,and clay minerals such as kaolinite,chlorite,smectite and illite have been discussed *** results demonstrate the paleo-environment of studied area was arid with enhanced saline and weak to strong oxidizing depositional *** chemical index of alteration(CIA)values in Jhimpir and Lakhra sections are in the ranges of 41.30-97.93 and 22.30-96.19,respectively,indicating that the Sohnari sediments experienced weak to intense chemical weathering in the source *** interpretation of the A-CN-K ternary diagram is consistent with the clay mineral contents in the studied sediments,which is characterized by the predominance of kaolinite,gibbsite and chlorite,demonstrating the weak to strong weathering state under warm and humid climatic *** chemical indices such as Sr/Ba,δU,V/Cr,Ni/Co,and Cu/Zn,U/Th and Ba/Ga show that Sohnari rocks of Early Eocene Laki Formation underwent strong evaporation,oxic water column with warm to humid and minor contact of cold climatic *** on our present data,it can be concluded that the sediments of Sohnari Member of Laki Formation from Jhimpir and Lakhra areas of Southern Indus Basin in Pakistan are related to Indio-Eurasian collision and came from the Indian shield rocks that were deposited in a brackish water body with a minor contact of the freshwater oxidizing paleo-environment depositional conditions.

关键词： Mineralogy Geochemistry Paleoclimate Sohnari Southern indus basin Lakhra

Investigation of Ceramic Based Composites by Using 2D Graphene Filler

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Graphene 2022年第2期11卷 19-29页

作者： Zeeshan Abbas Rashid Jalil Ibtsam riaz muhammad Tahir University of Engineering and Technology Lahore Pakistan

The ceramic composites of sodium bismuth titanate with reduce graphene oxide NBT/rGO of different compositions were fabricated by solid state sintering method and characterized. In this work, the graphene oxide (GO) and reduce graphene oxide (rGO) was successfully synthesized by Hummer’s modified method which is confirmed by FTIR and XRD results. The reduce graphene oxide used as 2D filler in piezoelectric creamic material. The crystalline structure of NBT/rGO composite was confirmed by X-ray diffraction with rhombohedral symmetry. The dispersion of rGO in the ceramic can be detect by the optical microcopy images. The electrical conductivity of sodium bismuth titanate shows increase at higher values of frequency and conductivity nanocomposites of different wt% were start decreases up to certain value of frequency. The broadening of peaks in frequency explicit plots of electrical conductivity with the help of LCR Meter (Impedance Capacitance and Resistance). The crystalline size of reduced graphene oxide and NBT is calculated by Scherrer’s formula of XRD peaks.

关键词： Sodium Bismuth Titanate Graphene Oxide Reduce Graphene Oxide Electrical Conductivity

Numerical Solution of Casson Fluid Flow under Viscous Dissipation and Radiation Phenomenon

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Journal of Applied Mathematics and Physics 2022年第2期10卷 475-490页

作者： Naveed Akbar Sardar muhammad Hussain riaz Ullah Khan School of Mathematics and Statistics Sichuan University of Science and Engineering Yibin China Department of Mathematical Sciences Balochistan University of Information Technology Engineering and Management Sciences (BUITEMS) Quetta Pakistan School of Life Science and Engineering University of Electronic Science and Technology of China Chengdu China

This article numerically investigates the 2D, steady, laminar, incompressible fluid flow, mass and heat transfer of a non-Newtonian fluid model induced by stretching surface. A Casson fluid model is considered to study the non-Newtonian behavior of the flowing fluid. The magnetic field and a porous medium are considered in the flow momentum, whereas the viscous dissipation is also taken into account in the energy transport phenomena. To see the fluid concentration, the concentration equation is used. Furthermore, the Nusselt number coefficient and skin friction are modified with the addition of nonlinear stretching and radiation parameters. With the similarity transformation, the nonlinear governing partial differential equations are transformed into a system of ordinary differential equations and then numerically solved using a fourth-order Runge-Kutta scheme with the shooting method. The relevant parameters of interest are interpreted for graphical results. The results illustrate that the fluid energy increases effectively with an increase in the Eckert number, radiation parameter, and heat source parameter, while it decreases by increasing the Prandtl number and heat sink parameter. Both the wall skin friction and the wall Nusselt number coefficient decelerate with an increase in the Casson parameter.

关键词： Casson Fluid Porous Medium Runge-Kutta Scheme Shooting Method Prandtl Number Nusselt Number Coefficient

蓝细菌微生物席主导的芙蓉统均一石生物丘:以河北涞源祁家峪剖面为例

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地质论评 2019年第5期65卷 1103-1122页

作者：梅冥相 muhammad riaz 刘丽孟庆芬中国地质大学(北京)球科学与资源学院北京100083 中国地质大学(北京)生物地质与环境地质国家重点实验室北京100083

基于中等尺度的构造特征,常常将微生物碳酸盐岩划分为四个类型:纹层状的叠层石、凝块状的凝块石、贫乏构造的均一石、树枝状的树形石;在其中,均一石被定义为相对贫乏构造和非晶质的中等构造,而且作为'隐秘微生物'的同义语曾经与凝块石... 详细信息

基于中等尺度的构造特征,常常将微生物碳酸盐岩划分为四个类型:纹层状的叠层石、凝块状的凝块石、贫乏构造的均一石、树枝状的树形石;在其中,均一石被定义为相对贫乏构造和非晶质的中等构造,而且作为'隐秘微生物'的同义语曾经与凝块石相混用。华北地台的芙蓉统,包括长山组和凤山组,可以进一步划分为3个淹没不整合面型三级沉积层序;在这些三级层序的强迫型海退体系域中,常常集中产出各种微生物碳酸盐岩所主导的生物丘,河北涞源祁家峪剖面的芙蓉统就是一个较为典型的实例。在该剖面,两套较为典型的均一石生物丘灰岩构成了较为壮观的沉积学现象,其内部特别的非均一组构与贫乏构造的宏观特征形成了强烈的反差,从而将这些均一石生物丘特征化,包括:①钙化蓝细菌化石如基座菌、葛万菌,以及可以类比于第谷菌的丝状蓝细菌鞘化石;②底栖鲕粒;③肾型菌状的钙化生物膜残余物;④海绵木乃伊;⑤底栖鲕粒填充的生物潜穴;⑥包覆着海绵木乃伊和生物潜穴的微叠层石。这些特征,表明了这些均一石生物丘可能形成于蓝细菌细胞外聚合物质(EPS)复杂的钙化作用,而且这样的EPS是蓝细菌微生物席及其内部的多重状生物膜的基本有机基质构成。由于均一石缺乏现代可以类比的典型实例,而且在其命名之后也很少描述在在古老的地层记录中,所以,河北涞源祁家峪剖面芙蓉统中的均一石生物丘为了解均一石形成的复杂机理提供了一个最为典型的实例。

关键词：钙化蓝细菌均一石寒武系芙蓉统祁家峪剖面河北省涞源县