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Innovative mitigation method for buried pipelines crossing faults

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Earthquake Engineering and Engineering Vibration 2022年第4期21卷 1089-1101页

作者： Mahdi Rojhani Majid Moradi Ali Derakhshani Department of Civil Engineering Faculty of EngineeringShahed UniversityTehranIran Faculty of Civil Engineering College of EngineeringUniversity of TehranTehranIran

A new remediation technique is proposed to mitigate large deformations imposed on buried pipeline systems subject to permanent ground *** this technique,low-density gravel(LDG)with high porosity,such as pumice,is used as backfill in the trench containing the pipe near an area susceptible to *** countermeasure decreases soil resistance,soil-pipe interaction forces and strain on the pipe as the pipeline deformation mechanism changes to a more desirable *** polystyrene geofoam has been introduced to decrease the density of the pipeline backfill;however,LDG is more efficient regarding workability during construction,environmental effects,durability,fire safety,and cost-effectiveness.A series of centrifuge model experiments in which the pipelines were subjected to reverse faulting was conducted to evaluate the proposed *** faulting,the axial and bending strain and pipe deflection were measured.A comparison of the responses of the remediated pipeline and the pipeline without remediation indicates that the proposed technique substantially mitigates the effects of large deformation.

关键词： pipelines centrifuge modeling faulting mitigation earthquake

Application of biocementation technique using Bacillus sphaericus for stabilization of soil surface and dust storm control

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Journal of Arid Land 2022年第5期14卷 537-549页

作者： Davood NAMDAR-KHOJASTEH Masoud BAZGIR Seyed Abdollah HASHEMI BABAHEIDARI Akwasi B ASUMADU-SAKYI Department of Soil Science Faculty of AgricultureShahed UniversityTehran ***Iran Department of Soil and Water Engineering Faculty of AgricultureIlam UniversityIlam ***Iran Department of Plant Protection Faculty of AgricultureShahed UniversityTehran ***Iran International Laboratory for Air Quality and Health School of ChemistryPhysics and Mechanical EngineeringQueensland University of TechnologyBrisbaneQueensland 4000Australia

Dust emission and wind erosion are widespread phenomena in arid and semi-arid regions,which have far-reaching harmful effects to the *** study aimed to use microbial induced carbonate precipitation(MICP)method with Bacillus sphaericus to reduce soil losses that occur in a dust-producing area due to wind erosion in the Ilam Province,*** samples at the 0-30 cm depth were used and sterilized in an autoclave for 2 h at 121℃ and 103 *** 3 kg soils were weighed and poured in the 35 cm×35 cm×3 cm *** treatments included two levels of ***(0.0 and 0.5 OD),three levels of suspension volume(123,264,and 369 mL),two levels of urea-chloride cementation solution(0.0 and 0.5 M),and two levels of bacterial spray(once and twice spray).After 28 d,soil properties such as soil mass loss,penetration resistance,and aggregate stability were *** results showed a low soil mass loss(1 g)in F_(14)formulation(twice bacterial spray+264 mL suspension volume+without cementation solution)and a high soil mass loss(246 g)in F_(5) formulation(without bacteria+264 mL suspension volume+0.5 M cementation solution).The highest(42.55%)and the lowest(19.47%)aggregate stabilities were observed in F_(16)and F_(7)formulations,respectively,and the highest penetration resistance(3.328 kg/cm^(2))was observed in F_(18) *** to the final results,we recommended the formulation with twice bacterial spray,0.5 M cementation solution,and 269 mL suspension volume as the best combination for soil surface ***,this method is environmentally friendly because it has no adverse effects on soil,water,and plants,thus,it would be an efficient approach to stabilize soil surface.

关键词： soil stabilization microbial cementation calcium carbonate bacteria penetration resistance

Optimal Estimation and Tracking Control for Variable-speed Wind Turbine with PMSG

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Journal of Modern Power Systems and Clean Energy 2020年第1期8卷 159-167页

作者： Farzad Bakhtiari Jalal Nazarzadeh shahed university TehranIran

Designing an optimal tracking controller and system observer is a nonlinear problem in the variable-speed wind energy conversion system(WECS).In this paper,an adjusted feedforward and feedback optimal controller with extended Kalman filter(EKF)is introduced to estimate and control the permanent magnet synchronous generator(PMSG)for the maximum power point tracking(MPPT)with several disturbances of the wind *** augmented model of wind turbine and PMSG is expanded,and then the parameters of the optimal controller and estimator are *** dynamic stability of the closed-loop system with feedback-feedforward controller(FFC),EKF and speed controller are *** compare the dynamic performance of EKF and FFC with the conventional controllers,numerical results are demonstrated with the disturbances of the wind speed and faults in power grid.

关键词： Permanent magnet synchronous generator(PMSG) maximum power point tracking(MPPT) extended Kalman filter(EKF) optimal tracking control

Comparison of the effects of high-intensity interval and moderate-intensity continuous training on inflammatory markers,cardiorespiratory fitness,and quality of life in breast cancer patients

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Journal of Sport and Health Science 2023年第6期12卷 674-689,F0003页

作者： Amin Isanejad Somayeh Nazari Behroz Gharib Ali Ghanbari Motlagh Immunoregulation Research Center Shahed UniversityTehran ***Iran Department of Exercise Physiology Sport Sciences Research InstituteTehran ***Iran Department of Physical Education and Sport Sciences Faculty of Human SciencesShahed UniversityTehran ***Iran Oncology Department Naft HospitalTehran ***Iran Cancer Research Center Shahid Beheshti University of Medical SciencesTehran ***Iran

Background:As the effectiveness of breast cancer treatment has improved,a growing number of long-term breast cancer survivors are seeking help for unique health *** patients may be at increased risk of cardiovascular disease due to the side effects of *** positive impact of most types of exercise has been repeatedly reported in people with cancer,but the most effective exercise approaches for maximum beneficial adaptations remain ***,this study aimed to compare the effects of high-intensity interval training(HIIT)and moderate-intensity continuous training(MICT) on inflammatory indices,adipokines,metabolic markers,body composition,cardiorespiratory fitness,and quality of life in breast cancer patients during adjuvant endocrine ***:Thirty non-metastatic breast cancer patients during adjuvant endocrine therapy who had been treated with chemotherapy and/or radiotherapy were recruited from Iran and randomized to HIIT,MICT,or control groups for a supervised exercise intervention that took place 3 times a week for 12 *** training intensity was determed based on the peak oxygen uptake(VO2peak),and the volume of training was matched in HIIT and MICT based on the *** composition,functional capacity,cardiorespiratory fitness,metabolic indices,sex hormones,adipokines,and inflammatory markers were assessed before and after the ***:The VO2peakincreased by 16.8% in the HIIT group in comparison to baseline values(mean difference=3.61 mL/kg/min).HIIT significantly improved the VO2peakcompared to control(mean difference=3.609 mL/kg/min) and MICT(mean differences=2.974 mL/kg/min)*** HIIT(mean difference=9.172 mg/dL) and MICT(mean difference=7.879 mg/dL) interventions significantly increased highdensity lipoprotein cholesterol levels compared to the control *** analysis of covariance showed that physical well-being significantly improved in MICT compared to control group(mean difference=3.268)

关键词： Breast cancer Cardiorespiratory fitness HIIT Inflammation MICTTagedAPTARAEnd

Lavender aromatherapy on anxiety and depression in patients with Acute Coronary Syndrome: a single-blind randomized clinical trial

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Frontiers of Nursing 2022年第2期9卷 233-239页

作者： Mohammad Nategh Mohammad Reza Heidari Abbas Ebadi Reza Norouzadeh Zahra Mohebbinia Bahman Aghaie Department of Intensive Care Nursing Nursing and Midwifery FacultyShahed UniversityTehran ***Iran Department of Nursing Nursing and Midwifery FacultyShahed UniversityTehranTehran ***Iran Nursing Faculty Baqiyatallah University of Medical SciencesTehran ***Iran Department of Nursing Nursing and Midwifery FacultyShahed UniversityTehran ***Iran School of Nursing Shiraz University of Medical SciencesShiraz ***Iran Department of Medical-Surgical Nursing School of Nursing and MidwiferyQom University of Medical SciencesQom ***Iran

Objective:In cardiovascular disease,a patient’s anxiety and depression can increase cardiac rehabilitation duration and *** aromatherapy as a non-pharmacological intervention effective in other contexts may be an efficient intervention to alleviating anxiety and depression in patients with Acute Coronary Syndrome(ACS).Methods:In this study,110 ACS patients were randomly assigned to two intervention and control *** of the lavender fragrance was prescribed for the intervention group and the drop of aromatic almond for the control group for 3 ***:The first-day anxiety and depression were significantly different in the two groups at 1 h and 9 h after the ***’morning’s difference before the intervention was not significant,but it was substantial 1 h after the *** the third morning of the intervention,this difference was ***:This study confirmed the effectiveness of lavender aromatherapy in reducing anxiety and depression in ACS ***’study’s results enable intensive care nurses to use aromatherapy with lavender oil as a non-pharmacological and cost-effective intervention to reduce their psychological tensions and increase patient satisfaction during hospitalization in the cardiac care units(CCU).

关键词： anxiety aromatherapy Acute Coronary Syndrome depression lavender randomized clinical trial

The synergistic effect of honey and cinnamon against Streptococcus mutans bacteria

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Asian Pacific Journal of Tropical Biomedicine 2017年第4期7卷 314-320页

作者： Mohammad Bagher Rezvani Mohammad Niakan Mohammad Kamalinejad Fateme Sadat Ahmadi Faeze Hamze Operative Department Shahed Dental SchoolShahed University Microbiology Department Shahed Medical SchoolShahed University School of Pharmacy Shahid Beheshti University of Medical Sciences Dental Research Center Shahed Dental SchoolShahed University Oral and Dental Disease Research Center Kerman University of Medical Science

Objective: To investigate the effect of Iranian honey, cinnamon and their combination against Streptococcus mutans ***: Nine experimental solutions were examined in this study, including two types of honey(pasteurized and sterilized), two types of cinnamon extract(dissolved in distilled water or dimethyl sulfoxide) and five different mixtures of cinnamon in honey(prepared by admixing 1%–5% w/w of cinnamon extract into 99%–95% w/w of honey, respectively).Meanwhile, each of mentioned agent was considered as the first solution while it was diluted into seven serially two-fold dilutions(from 1:2 to 1:128 v/v).Therefore, eight different concentrations of each agent were *** antibacterial tests were performed through blood agar well diffusion method, and the minimum inhibitory concentration(MIC) was ***, the data were subjected to statistical analysis incorporating Two-way ANOVA and Bonferroni post hoc tests(a = 0.01).Results: The highest zone of inhibition was recorded for the mixtures of honey and cinnamon while all the subgroups containing 95%–99% v/v of honey were in the same range(P < 0.01).The MIC for both honey solutions were obtained as 500 mg/mL whereas it was 50 mg/m L for both cinnamon ***, the MIC related to all honey/cinnamon mixtures were 200 mg/***: A profound synergistic effect of honey and cinnamon was observed against Streptococcus mutans while there was no significant difference among extracts containing 99%–95% v/v of honey admixing with 1%–5% v/v of cinnamon, respectively.

关键词： Synergistic effect Honey Cinnamon Streptococcus mutans

An online estimator for rotor resistance in vector drives of induction machines based on Walsh functions

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Control Theory and Technology 2014年第4期12卷 402-412页

作者： Hamidreza SHIRAZI Jalal NAZARZADEH Engineering Faculty Shahed University

In a modern electrical driver, rotor field oriented control an appropriate transient response. In this method, the space （RFOC） method has been used to achieve a good performance and vector of the rotor flux comes handy by the rotor resistance value. The rotor resistance is one of the important parameters which varies according to motor speed and room temperature alteration. In this paper, a new on-line estimation method is utilized to obtain the rotor resistance by using Walsh functions domain. The Walsh functions are one of the most applicable functions in piecewise constant basis functions （PCBF） to solve dynamic equations. On the other hand, an integral operational matrix is used to simplify the process and speed of the computation algorithm. The simulations results show that the proposed method is capable of solving the dynamic equations in an electrical machine on a time interval which robustly estimates the rotor resistance in contrast with injection noises.

关键词： Vector control Walsh functions Operational matrix Rotor resistance estimation

An ensemble deep learning model for cyber threat hunting in industrial internet of things

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Digital Communications and Networks 2023年第1期9卷 101-110页

作者： Abbas Yazdinejad Mostafa Kazemi Reza M.Parizi Ali Dehghantanha Hadis Karimipour Cyber Science Lab School of Computer ScienceUniversity of GuelphOntarioCanada Department of Electrical Engineering Faculty of EngineeringShahed UniversityTehranIran College of Computing and Software Engineering Kennesaw State UniversityGAUSA School of Engineering University of GuelphOntarioCanada

By the emergence of the fourth industrial revolution,interconnected devices and sensors generate large-scale,dynamic,and inharmonious data in Industrial Internet of Things(IIoT)*** vast heterogeneous data increase the challenges of security risks and data analysis *** IIoT grows,cyber-attacks become more diverse and complex,making existing anomaly detection models less effective to *** this paper,an ensemble deep learning model that uses the benefits of the Long Short-Term Memory(LSTM)and the AutoEncoder(AE)architecture to identify out-of-norm activities for cyber threat hunting in IIoT is *** this model,the LSTM is applied to create a model on normal time series of data(past and present data)to learn normal data patterns and the important features of data are identified by AE to reduce data *** addition,the imbalanced nature of IIoT datasets has not been considered in most of the previous literature,affecting low accuracy and *** solve this problem,the proposed model extracts new balanced data from the imbalanced datasets,and these new balanced data are fed into the deep LSTM AE anomaly detection *** this paper,the proposed model is evaluated on two real IIoT datasets-Gas Pipeline(GP)and Secure Water Treatment(SWaT)that are imbalanced and consist of long-term and short-term dependency on *** results are compared with conventional machine learning classifiers,Random Forest(RF),Multi-Layer Perceptron(MLP),Decision Tree(DT),and Super Vector Machines(SVM),in which higher performance in terms of accuracy is obtained,99.3%and 99.7%based on GP and SWaT datasets,***,the proposed ensemble model is compared with advanced related models,including Stacked Auto-Encoders(SAE),Naive Bayes(NB),Projective Adaptive Resonance Theory(PART),Convolutional Auto-Encoder(C-AE),and Package Signatures(PS)based LSTM(PS-LSTM)model.

关键词： Internet of things IIoT Anomaly detection Ensemble deep learning Neural networks LSTM

A Review of Privacy and Security of Edge Computing in Smart Healthcare Systems: Issues, Challenges, and Research Directions

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Tsinghua Science and Technology 2024年第4期29卷 1152-1180页

作者： Ahmad Alzu’bi Ala’a Alomar shahed Alkhaza’leh Abdelrahman Abuarqoub Mohammad Hammoudeh Department of Computer Science Jordan University of Science and TechnologyIrbid 22110Jordan Cardiff School of Technologies Cardiff Metropolitan UniversityCardiff CF52YBUK Department of Information and Computer Science King Fahd University of Petroleum and MineralsDhahran 31261Kingdom of Saudi Arabia

The healthcare industry is rapidly adapting to new computing environments and technologies. With academics increasingly committed to developing and enhancing healthcare solutions that combine the Internet of Things (IoT) and edge computing, there is a greater need than ever to adequately monitor the data being acquired, shared, processed, and stored. The growth of cloud, IoT, and edge computing models presents severe data privacy concerns, especially in the healthcare sector. However, rigorous research to develop appropriate data privacy solutions in the healthcare sector is still lacking. This paper discusses the current state of privacy-preservation solutions in IoT and edge healthcare applications. It identifies the common strategies often used to include privacy by the intelligent edges and technologies in healthcare systems. Furthermore, the study addresses the technical complexity, efficacy, and sustainability limits of these methods. The study also highlights the privacy issues and current research directions that have driven the IoT and edge healthcare solutions, with which more insightful future applications are encouraged.

关键词： edge computing fog computing data privacy healthcare systems intelligent edges