检索结果-南通市图书馆

Acta Geochimica 2016年第4期35卷 368-380页

作者： Ali A.Omran osama K.Dessouky Nuclear Materials Authority P.O.Box 530El MaadiCairoEgypt

Syenogranitic dykes in the north of Egypt's Eastern Desert are of geological and economic interest because of the presence of magmatic and supergene enrichment of radioactive mineralization. Zircon crystal morphology within the syenogranitic dykes allows precise definition of sub-alkaline series granites and crystallized at mean temperature of about 637 °C. The growth pattern of the zircons suggest magmatic and hydrothermal origins of radioactive mineralization. Hydrothermal processes are responsible for the formation of significant zircon overgrowth; high U-zircon margins might have occurred contemporaneously with the emplacement of syenogranitic dykes which show anomalous uranium(e U) and thorium(e Th) contents of up to 1386 and 7330 ppm, *** chemistry revealed a relative increase of Hf consistent with decreasing Zr content, suggesting the replacement of Zr by Hf during hydrothermal *** uranium mineralization is present and recognized by the presence of uranophane and autunite.

关键词：矿化富集晶体形态放射性锆石沙漠埃及化学花岗质

A New Action-Based Reasoning Approach for Playing Chess

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第10期69卷 175-190页

作者： Norhan Hesham osama Abu-Elnasr Samir Elmougy Faculty of Computers and Information Department of Computer ScienceMansoura University35516Egypt

Many previous research studies have demonstrated game strategies enabling virtual players to play and take actions mimicking *** CaseBased Reasoning(CBR)strategy tries to simulate human thinking regarding solving problems based on constructed *** paper suggests a new Action-Based Reasoning(ABR)strategy for a chess *** strategy mimics human experts’approaches when playing chess,with the help of the CBR *** proposed engine consists of the following ***,an action library compiled by parsing many grandmasters’cases with their actions from different games is ***,this library reduces the search space by using two filtration steps based on the defined action-based and encoding-based similarity ***,the minimax search tree is fed with a list extracted from the filtering stage using the alpha-beta algorithm to prune the *** proposed evaluation function estimates the retrievably reactive ***,the best move will be selected,played on the board,and stored in the action library for future *** experiments were conducted to evaluate the performance of the proposed ***,the engine played 200 games against Rybka 2.3.2a scoring 2500,2300,2100,and 1900 rating ***,they used the Bayeselo tool to estimate these rating points of the *** results illustrated that the proposed approach achieved high rating points,reaching as high as 2483 points.

关键词： Action based reasoning case-based reasoning chess engine computer games search algorithm

A Novel Design of Octal-Valued Logic Full Adder Using Light Color State Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第6期67卷 3487-3503页

作者： Ahmed Talal osama Abu-Elnasr Samir Elmougy Department of Computer Science Faculty of Computes and InformationMansoura UniversityMansoura35516Egypt

Due to the demand of high computational speed for processing big data that requires complex data manipulations in a timely manner,the need for extending classical logic to construct new multi-valued optical models becomes a challenging and promising research *** paper establishes a novel octal-valued logic design model with new optical gates construction based on the hypothesis of Light Color State Model to provide an efficient solution to the limitations of computational processing inherent in the electronics *** provide new mathematical definitions for both of the binary OR function and the PLUS operation in multi valued logic that is used as the basis of novel construction for the optical full adder *** case studies were used to assure the validity of the proposed *** cases proved that the proposed optical 8-valued logic models provide significantly more information to be packed within a single bit and therefore the abilities of data representation and processing is increased.

关键词： Mathematical modeling numerical simulations optical logic optics in computing multi-valued logic full adder

A multidisciplinary approach to sphincter pharyngoplasty for correction of velopharyngeal dysfunction following repair of cleft palate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal Of Plastic and Reconstructive Surgery 2022年第3期4卷 105-109页

作者： Nabil Mokhter Mohamed Ahmed Mohamed Zayed Ayman Mohamed Amer Ahmed Hassan El-Sabbagh Omar osama Shouman Plastic Surgery Center Faculty of MedicineMansoura UniversityMansoura 35516Egypt Phoniatric Unit Department of ENTFaculty of MedicineMansoura UniversityMansoura 35516Egypt

Background:Management of severe velopharyngeal dysfunction is best performed by a multispecialty *** team could include a speech-language pathologist,otolaryngologist,prosthodontist,and a plastic *** most commonly performed surgical procedures in complicated cases with scarred soft palate are sphincter pharyngoplasty and pharyngeal *** this study,a multidisciplinary approach was applied for proper assessment and surgical intervention using sphincter pharyngoplasty for velopharyngeal insufficiency after cleft palate ***:Twenty patients underwent sphincter *** diagnosis was performed using auditory perceptual assessment,nasoendoscopy assessment,nasometry,and ***:There were statistically significant differences between the preoperative and postoperative *** occurred in two *** sleep apnea occurred in three patients and was resolved spontaneously within three months,and one patient experienced slight wound ***:Velopharyngeal dysfunction after cleft palate repair is best treated by a multidisciplinary team through speech therapy together with sphincter pharyngoplasty.

关键词： Velopharyngeal insufficiency Clinical diagnostic tools Sphincter pharyngoplasty

Effects of Bentonite,Hydrogel and Biochar Amendments on Soil Hydraulic Properties from Saturation to Oven Dryness

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2019年第5期29卷 598-607页

作者： osama M0HAWESH Wolfgang DURNER Department of Plant Production Faculty of AgricultureMutah UniversityKarak 61710 (Jordan) Division of Environmental Science and Technology Graduate School of AgricultureKyoto UniversityKyoto 6110011 (Japan) Institute of Geoecology Technical University of BraunschweigLanger Kamp 19cBraunschweig 38106 (Germany)

Effects of hydrogel, bentonite, and biochar as soil amendments on soil hydraulic properties and improving water availability from saturation to oven dryness were investigated. Soils were mixed with hydrogel (0.10%, 0.25%, and 0.50%), bentonite (0.5%, 1.0%, and 2.5%), and biochar (1.0%, 2.5%, and 5.0%) as soil amendments (weight:weight). Three methods (extended multistep outflow (XMSO), evaporation (EVA), and WP4 dewpoint potentiometer) were used to measure soil hydraulic properties from saturation to oven dryness. The cumulative XMSO results were more uniform across all the applied pressure steps for the amended soils. The EVA exhibited a shorter linear decrease during the first evaporation stage and a lower evaporation rate during the second evaporation stage. The WP4 results also exhibited that soil amendments increased the soil water content of the amended soils at low matric potentials. The results of soil water retention curves revealed that the unamended soil retained less water at any matric potential compared to the amended soils. Soil hydraulic conductivity decreased with increasing amount of soil amendments. The saturated hydraulic conductivity was higher for the unamended soil than the soils amended w计h 2.5% bentonite, 0.50% hydrogel, and 5.0% biochar by 11, 3, and 18 times, respectively. These results suggested that soil amendments improved soil water retentivity, which confirmed the appropriateness of these soil amendments for potential use in sandy soil improvements. However, field experiments and economical perception studies should be considered for further investigation.

关键词： evaporation extended multistep outflow soil amendment soil matric potential soil moisture soil water retentivity water availability WP4 dewpoint potentiometer

Fast Degradation of Green Pollutants Through Nanonets and Nanofibers of the Al-Doped Zinc Oxide

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2018年第5期31卷 533-546页

作者： osama Saber Haifa Alomair Mohamed Abu-Abdeen Abdullah Aljaafari Faculty of Science King Faisal University Al-Hasa 31982P.O. Box 400 Saudi Arabia Egyptian Petroleum Research Institute P.O Box 11727 Nasr City Cairo Egypt Ministry of Education Al-Hasa 31982 Saudi Arabia

In this study, series of nanolayered structures of Zn–Al LDHs were prepared by urea hydrolysis. Nanofibers and nanonets of the Al-doped ZnO were formed via the decomposition of the nanolayers under high pressure and temperature. Nanospheres were also prepared for comparison. The different morphologies of the prepared nanomaterials were confirmed by several techniques. An improvement for the optical properties of the doped zinc oxides was observed through narrowing of their band gap energies because of transforming the nanolayers to nanonets and nanofibers. The photocatalytic activities of the prepared nanomaterials were studied through photocatalytic degradation of the pollutants of acid green dyes. Complete decolorization and mineralization of green dyes happened in the presence of the nanolayers and nanospheres within 4–6 h,while the nanonets and the nanofibers achieved the complete decolorization and degradation of the dyes at shorter time 1.3 h. These results could be explained though the kinetic study of the photocatalytic degradation of dyes. It was concluded that the nanonets and the nanofibers were very effective for the photocatalytic degradation of pollutants.

关键词： Al-doped ZnO nanolayers Nanofibers Nanonets Band gap energy Photocatalytic degradation Acid green dyes pollutants

Data-driven Operation Risk Assessment of Wind-integrated Power Systems via Mixture Models and Importance Sampling

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2020年第3期8卷 437-445页

作者： osama Aslam Ansari Yuzhong Gong Weijia Liu Chi Yung Chung Department of Electrical and Computer Engineering University of SaskatchewanSaskatoonCanada

The increasing penetration of highly intermittent wind generation could seriously jeopardize the operation reliability of power systems and increase the risk of electricity outages. To this end, this paper proposes a novel data-driven method for operation risk assessment of wind-integrated power systems. Firstly, a new approach is presented to model the uncertainty of wind power in lead time. The proposed approach employs k-means clustering and mixture models(MMs) to construct time-dependent probability distributions of wind *** proposed approach can also capture the complicated statistical features of wind power such as multimodality. Then, a nonsequential Monte Carlo simulation(NSMCS) technique is adopted to evaluate the operation risk indices. To improve the computation performance of NSMCS, a cross-entropy based importance sampling(CE-IS) technique is applied. The CE-IS technique is modified to include the proposed model of wind *** method is validated on a modified IEEE 24-bus reliability test system(RTS) and a modified IEEE 3-area RTS while employing the historical data of wind generation. The simulation results verify the importance of accurate modeling of shortterm uncertainty of wind power for operation risk *** case studies have been performed to analyze the impact of transmission systems on operation risk indices. The computational performance of the framework is also examined.

关键词： Cross entropy mixture model Monte Carlo simulation operation risk power system reliability

Self-Management of Low Back Pain Using Neural Network

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第1期66卷 885-901页

作者： Purushottam Sharma Mohammed Alshehri Richa Sharma osama Alfarraj ASET Amity University Uttar PradeshNoida201301India Department of Information Technology College of Computer and Information SciencesMajmaah UniversityMajmaah11952Saudi Arabia Computer Science Department Community CollegeKing Saud UniversityRiyadhSaudi Arabia

Low back pain(LBP)is a morbid condition that has afflicted several citizens in *** has negatively impacted the European economy due to several man-days lost,with bed rest and forced inactivity being the usual LBP care and management *** models,which incorporate various regression analyses,have been executed for the investigation of this premise due to the simplicity of ***,such straight models fail to completely consider the impact of association brought about by a mix of nonlinear connections and autonomous *** this paper,we discuss a system that aids decision-making regarding the best-suited support system for LBP,allowing the individual to avail of reinforcement and improvement in its *** activities are monitored with the help of a wearable sensor that helps in their detection and their classification as those that soothe or aggravate LBP and hence,should or should not be *** system helps the patients set their own boundaries and milestones with respect to suitable *** system also does windowing and feature *** present study is an empirical and comparative analysis of the most suitable activities that patients suffering from low back pain can *** evaluation shows that the system can distinguish between nine common daily activities effectively and helps self-monitor these activities for the efficient management of LBP.

关键词： Low back pain neural networks sensor classification time series

Securing Transmitted Color Images Using Zero Watermarking and Advanced Encryption Standard on Raspberry Pi

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第11期47卷 1967-1986页

作者： Doaa Sami Khafaga Sarah M.Alhammad Amal Magdi osama ElKomy Nabil ALashin Khalid M.Hosny Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Information Technology Zagazig UniversityZagazig44519Egypt

Image authentication techniques have recently received a lot of attention for protecting images against unauthorized *** to the wide use of the Internet nowadays,the need to ensure data integrity and authentication *** techniques,such as watermarking and encryption,are used for securing images transmitted via the *** majority of watermarking systems are PC-based,but they are not very *** watermarking methods need to be developed to accommodate real-time applications and provide *** paper presents hybrid data security techniques using a zero watermarking method to provide copyright protection for the transmitted color images using multi-channel orthogonal Legendre Fourier moments of fractional orders(MFrLFMs)and the advanced encryption standard(AES)algorithm on a low-cost Raspberry *** order to increase embedding robustness,the watermark picture is scrambled using the Arnold *** watermarking is implemented on the Raspberry Pi to produce a real-time ownership verification *** sending the ownership verification key and the original image to the monitoring station,we can encrypt the transmitted data with AES for additional security and hide any viewable *** receiver next verifies the received image’s integrity to confirm its authenticity and that it has not been tampered *** assessed the suggested algorithm’s resistance to many *** suggested algorithm provides a reasonable degree of robustness while still being *** proposed method provides improved bit error rate(BER)and normalized correlation(NC)values compared to previous zero watermarking *** performance analysis is performed to demonstrate its *** a 256×256 image size,it takes only 2 s to apply the zero-watermark algorithm on the Raspberry Pi.

关键词： Zero watermarking Raspberry Pi advanced encryption standard

Using Portable Gamma-Ray Spectrometry for Testing Uranium Migration: A Case Study from the Wadi El Kareim Alkaline Volcanics,Central Eastern Desert, Egypt

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2018年第6期92卷 2214-2232页

作者： osama K. DESSOUKY Hani H. ALI Nuclear Materials Authority P.O.Box 530El MaadiCairoEgypt

The 300±20 Ma anomalously radioactive trachytes of Wadi El Kareim, central Eastern Desert, are a significant example of U-mineralization related to the alkaline volcanics in Egypt. Extensive portable gamma-ray spectrometric data has been utilized to identify geological factors controlling uranium mobility in the geological units along the three detailed study locations of Kab Al-Abyad, South Wadi(W) Al-Tarafawy and W. Al-Farkhah; their eT h/eU ratios averaging around 4.1, 3.7 and 5.6 respectively. Quantitative analysis with the integration of mobility maps and geological studies suggest two systems controlling U-migration within the geological units(confined system and unconfined system). In the confined system, the syngenetically formed U have experienced mobility after leaching and are redistributed in the presence of an incorporation carrier during transportation(probably as carbonate complexes). Then the retardant for uranium is achieved by sorption or by coprecipitation with the aid of Fe oxy-hydroxide, and finally the formation of immobile secondary U-bearing minerals takes place along a lithogeochemical trap. In contrast to the confined system, the unconfined one is basically lacking the lithogeochemical trap which influences the final accumulation of U-bearing minerals. The radioactivity of the trachyte rocks arises from the radioactive minerals uranophane and betauranophane with U-and/or Th-bearing minerals samarskite, Th-rich REE silicates, monazite and allanite.

关键词： radioactivity uranium migration systems alkaline volcanics Egypt