检索结果-南通市图书馆

Chinese Optics Letters 2017年第10期15卷 11-14页

作者： Mahdi Nouri Mohsen Mivehchy Mohamad farzan Sabahi Department of Electrical Engineering University of Isfahan

In this Letter, a method based on the effects of imperfect oscillators in lasers is proposed to distinguish targets in continuous wave tracking lidar. This technique is based on the fact that each lidar signal source has a specific influence on the phase noise that makes real targets from the false ones. A simulated signal is produced by complex circuits, modulators, memory, and signal oscillators. For example, a deception laser beam has an unequal and variable phase noise from a real target. Thus, the phase noise of transmitted and received signals does not have the same power levels and patterns. To consider the performance of the suggested method, the probability of detection（PD） is shown for various signal-to-noise ratios and signal-to-jammer ratios based on experimental outcomes.

关键词： Target recognition based on phase noise of received laser signal in lidar jammer LFM

Effects of synthesized nanoparticles and Henna-Tragacanth solutions on oil/water interfacial tension:Nanofluids stability considerations

在线全文

学校读者我要写书评

暂无评论

Petroleum 2020年第3期6卷 293-303页

作者： Pouya Tavakoli Seyed Reza Shadizadeh farzan Hayati Moslem Fattahi Department of Petroleum Engineering Abadan Faculty of Petroleum EngineeringPetroleum University of Technology(PUT)AbadanIran Department of Chemical Engineering Abadan Faculty of Petroleum EngineeringPetroleum University of Technology(PUT)AbadanIran

Rising global energy demand has encouraged engineers to create and design new methods to improve oil recovery from *** this study,feasibility of using Henna extract as a natural surfactant and synthesized nanoparticles(Titanium dioxide(TiO2),Silicon dioxide(SiO2),Graphene and composite of TiO2-Graphene)for reduction of oil-water interfacial tension has been experimentally *** were synthesized via sol-gel method and XRD,FESEM,EDAX and FTIR tests were conducted to confirm the authenticity of this synthesizing ***-surfactants were stabled with a natural water-based suspending surfactant called Tragacanth extract,which could be introduced as a practical substitute for industrial nanoparticles'stabilizers in oil *** CMC determination of Henna extract surfactant,the optimal concentration of Tragacanth extract surfactant,with the purpose of nano-surfactants’stabilization,was determined through particle size and zeta potential *** of interfacial tension(IFT)measurements showed that the increase of Henna extract concentration from 0 wt%to 10 wt%reduced IFT between kerosene and water from 37.23 to 15.24 mN/***,adding 1 wt%of synthesized TiO2 nanoparticle to the Henna extract surfactant at its CMC value reduced IFT from 18.43 to 14.57 mN/*** an impact of this significant reduction in IFT value,oil recovery factor could be improved drastically during EOR *** proved that TiO2 nano-surfactant was as effective as industrial surfactants,which put human's and environment's health at risk and impose heavy economic strain on governments.

关键词： Tragacanth extract Henna extract Nanoparticles Sol-gel method Graphene Interfacial tension

Homocysteine level in Iranian patients with premature acute myocardial infarction

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2009年第16期122卷 1952-1954页

作者： Mohammad Shojaie farzan Naghshvar Hamid Reza Izadi Ahad Eshraghian Morteza Pourahmad Mohammad Shojaie Peymanieh Hospital Jahrom University of Medical Sciences Internal Medicine Department Shiraz University of Medical Sciences

Homocysteine may impair vascular endothelial cell function. Besides, it may also induce cell damage,smooth muscle cell proliferation, thrombogenesis and oxidation of low-density lipoproteins.

关键词： homocysteine premature myocardial infarction Iranian patients

Application of fluorodeoxyglucose positron emission tomography in the management of head and neck cancers

在线全文

学校读者我要写书评

暂无评论

World Journal of Radiology 2014年第6期6卷 238-251页

作者： farzan Siddiqui Min Yao Department of Radiation Oncology Henry Ford Health System Detroit MI 48202 United States Department of Radiation Oncology University Hospi-tals Case Medical Center Cleveland OH 44106 United States

The use of fluorodeoxyglucose positron emission to-mography(FDG PET) scan technology in the manage-ment of head and neck cancers continues to increase. We discuss the biology of FDG uptake in malignant lesions and also discuss the physics of PET imaging. The various parameters described to quantify FDG up-take in cancers including standardized uptake value, metabolic tumor volume and total lesion glycolysis are presented. PET scans have found a significant role in the diagnosis and staging of head and neck cancers. They are also being increasingly used in radiation ther-apy treatment planning. Many groups have also used PET derived values to serve as prognostic indicators of outcomes including loco-regional control and overall survival. FDG PET scans are also proving very useful in assessing the efficacy of treatment and management and follow-up of head and neck cancer patients. This review article focuses on the role of FDG-PET com-puted tomography scans in these areas for squamous cell carcinoma of the head and neck. We present the current state of the art and speculate on the future applications of this technology including protocol de-velopment, newer imaging methods such as combinedmagnetic resonance and PET imaging and novel ra-diopharmaceuticals that can be used to further study tumor biology.

关键词： Fluorodeoxyglucose Positron emission tomography Squamous cell carcinoma Head and neck cancer Radiation therapy planning

Nanoparticles for targeted delivery of therapeutics and small interfering RNAs in hepatocellular carcinoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第42期21卷 12022-12041页

作者： Jaleh Varshosaz Maryam farzan Department of Pharma-ceutics Faculty of Pharmacy and Novel Drug Delivery Systems Research Centre Isfahan University of Medical Sciences

Hepatocellular carcinoma(HCC) is the 5th most common malignancy which is responsible for more than half million annual mortalities; also, it is the third leading cause of cancer related death. Unfavorablesystemic side-effects of chemotherapeutic agents and susceptibility to the degradation of small interfering RNAs(si RNAs), which can knock down a specific gene involved in the disease, have hampered their clinical application. So, it could be beneficial to develop an efficient carrier for the stabilization and specific delivery of drugs and si RNA to cells. Targeted nanoparticles have gained considerable attention as an efficient drug and gene delivery system, which is due to their capability in achieving the highest accumulation of cytotoxic agents in tumor tissue, modifiable drug pharmacokinetic- and bio-distribution, improved effectiveness of treatment, and limited sideeffects. Recent studies have shed more light on the advantages of novel drug loaded carrier systems vs free drugs. Most of the animal studies have reported improvement in treatment efficacy and survival rate using novel carrier systems. Targeted delivery may be achieved passively or actively. In passive targeting, no ligand as homing device is used, while targeting is achieved by incorporating the therapeutic agent into a macromolecule or nanoparticle that passively reaches the target organ. However, in active targeting, the therapeutic agent or carrier system is conjugated to a tissue or cell-specific receptor which is overexpressed in a special malignancy using a ligand called a homing device. This review covers a broad spectrum of targeted nanoparticles as therapeutic and nonviral si RNA delivery systems, which are developed for enhanced cellular uptake and targeted gene silencing in vitro and in vivo and their characteristics and opportunities for the clinical applications of drugs and therapeutic si RNA are discussed in this article. Asialoglycoprotein receptors, low-density lipoprotein, gangl

关键词： Small interfering RNA Targeted delivery Nanopartic

Review of deep learning and artificial intelligence models in fetal brain magnetic resonance imaging

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第16期11卷 3725-3735页

作者： farzan Vahedifard Jubril O Adepoju Mark Supanich Hua Asher Ai Xuchu Liu Mehmet Kocak Kranthi K Marathu Sharon E Byrd Department of Diagnostic Radiology and Nuclear Medicine Rush Medical CollegeChicagoIL 606012United States Division for Diagnostic Medical Physics Department of Radiology and Nuclear MedicineRush University Medical CenterChicagoIL 606012United States

Central nervous system abnormalities in fetuses are fairly common,happening in 0.1%to 0.2%of live births and in 3%to 6%of *** initial detection and categorization of fetal Brain abnormalities are *** detecting and segmenting fetal brain magnetic resonance imaging(MRI)could be timeconsuming,and susceptible to interpreter *** intelligence(AI)algorithms and machine learning approaches have a high potential for assisting in the early detection of these problems,improving the diagnosis process and follow-up *** use of AI and machine learning techniques in fetal brain MRI was the subject of this narrative review *** AI,anatomic fetal brain MRI processing has investigated models to predict specific landmarks and segmentation *** gestation age weeks(17-38 wk)and different AI models(mainly Convolutional Neural Network and U-Net)have been *** models'accuracy achieved 95%and *** could help preprocess and postprocess fetal images and reconstruct ***,AI can be used for gestational age prediction(with one-week accuracy),fetal brain extraction,fetal brain segmentation,and placenta *** fetal brain linear measurements,such as Cerebral and Bone Biparietal Diameter,have been *** of brain pathology was studied using diagonal quadratic discriminates analysis,Knearest neighbor,random forest,naive Bayes,and radial basis function neural network *** learning methods will become more powerful as more large-scale,labeled datasets become *** shared fetal brain MRI datasets is crucial because there aren not many fetal brain pictures ***,physicians should be aware of AI's function in fetal brain MRI,particularly neuroradiologists,general radiologists,and perinatologists.

关键词： Artificial intelligence Fetal brain Magnetic resonance imaging Neuroimaging

The effect of treatment package time in head and neck cancer patients treated with adjuvant radiotherapy and concurrent systemic therapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Otorhinolaryngology-Head and Neck Surgery 2019年第3期5卷 160-167页

作者： Ahmed I.Ghanem Matthew Schymick Souheyla Bachiri Aniruddh Mannari Jawad Sheqwara Charlotte Burmeister Steven Chang Tamer Ghanem farzan Siddiqui Department of Radiation Oncology Henry Ford Hospital2799 W.Grand BlvdDetroitMI 48202USA Department of Medical Oncology Henry Ford Hospital2799 W.Grand BlvdDetroitMI 48202USA Department of Public Health Science Henry Ford Hospital2799 W.Grand BlvdDetroitMI 48202USA Department of Otolaryngology Henry Ford Hospital2799 W.Grand BlvdDetroitMI 48202USA Alexandria Clinical Oncology Department Alexandria UniversityQasm Bab SharqiAlexandria Governate00302Egypt

Objectives:In patients with head and neck carcinoma,“treatment package time”(TPT)was proven to impact outcomes in cases receiving adjuvant radiotherapy *** impact in patients receiving radiotherapy with concurrent systemic therapy has not been studied *** TPT influence on survival endpoints for patients treated with surgery followed by radiation and concurrent systemic therapy was ***:Institutional database to identify head and neck carcinoma cases treated with definitive surgery followed by concomitant chemo(bio)radiotherapy(CRT)was *** was the number of days elapsed between surgery and the last day of radiation.%FINDCUT SAS macro tool was used to search for the cutoff TPT that was associated with significant survival ***-Meier curves,log-rank tests as well as univariate and multivariate analyses were used to assess overall survival(OS)and recurrence free survival(RFS).Results:One hundred and three cases with a median follow up of 37 months were included in the *** tumors were 43%,oral cavity 40%and laryngeal 17%of *** systemic therapy included platinum and cetuximab in 72%and 28%,*** TPT was found to be<100 days with significantly better OS(P=0.002)and RFS(P=0.043)compared to TPT≥100 *** multivariate analysis;TPT<100 days,extracapsular nodal extension,high-risk score,iymphovascular space and perineural invasion were independent predictors for worse OS(P<0.05).T4,extracapsular nodal extension and high-risk score were all significantly detrimental to RFS(P<0.05).Conclusions:Addition of concomitant systemic therapy to adjuvant radiotherapy did not compensate for longer TPT in head and neck squamous cell *** coordinated care must be provided to ensure the early start of CRT with minimal treatment breaks.

关键词： Head and neck cancer Treatment package time Adjuvant radiation therapy Concomitant systemic therapy Survival

A Survey of Correlation Infertility Self-Efficacy with Behavioral Health Scales in Infertile Women

在线全文

学校读者我要写书评

暂无评论

Health 2014年第10期6卷 943-949页

作者： Mahbobeh Faramarzi Hajar Pasha Seddigheh Esmailzadeh farzan Kheirkhah Karimollah Hajian-Tilaki Hajar Salmalian Department of Psychiatry Faculty of Medicine Babol University of Medical Sciences Babol Iran Department of Social Medicine and Health Faculty of Medicine Babol University of Medical Sciences Babol Iran Fatemeh Zahra Infertility and Reproductive Health Research Center Babol University of Medical Sciences Babol Iran

Background: Infertility is a unique medical challenge that can have health behavioral consequence on infertile women including lack of self-esteem, depression, anxiety, fertility problem in infertile couples. The aim of this study was to evaluate correlation between self-efficacy and health behaviors scales in infertile women. Methods: A cross sectional study was conducted on 89 infertile women with mild to moderate depression (Beck scores 10 - 47) who were recruited from Fatemeh Zahra Infertility and Reproductive Health Research Center. All participants completed Self-efficacy Inventory (ISE) and other health behavioral scales (e.g., the Beck Depression Inventory (BDI), Cattle Anxiety Scale (CAS), Fertility Problem Infertility (FPI), and GHQ). Pearson correlation coefficient and Spearman rho correlation coefficient were used to analyze the data. Variables were included in the study if they had a p-value

关键词： Infertility Self-Efficacy Depression Stress Anxiety Health Behaviors Fertility Problem

Australian tertiary care outcomes of entecavir monotherapy in treatment naive patients with chronic hepatitis B

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第5期19卷 721-726页

作者： farzan Fahrtash-Bahin Viraj C Kariyawasam Timothy Gray Karen Byth Jacob George Mark W Douglas Storr Liver Unit Westmead Millennium InstituteUniversity of Sydney at Westmead Hospital2145 SydneyAustralia Centre for Infectious Diseases and Microbiology and Sydney Emerging Infections and Biosecurity Institute University of Sydney at Westmead Hospital2145 SydneyAustralia Department of Biostatistics School of Public HealthUniversity of Sydney2145 SydneyAustralia

AIM:To evaluate the long-term treatment outcomes of entecavir monotherapy in treatment naive patients in an Australian tertiary care setting. METHODS:A retrospective analysis of treatment naive patients receiving entecavir monotherapy through Westmead Hospital was *** were excluded if they had received previous treatment with another nucleoside or nucleotide analogue,were pregnant or less than 18 years old. RESULTS:Out of 336 patients,163 patients fulfilled the selection *** of follow up was 3-46 mo (mean 26 mo).134 patients(82.2%)had pre-treatment biopsies,with 26 patients(16.0%)demonstrating F3-4 *** total,153 patients(93.9%)achieved at least Partial Virological Suppression(PVS),with 134 patients (82.2%)achieving complete virological suppression. The cumulative CVS and PVS rates at 36 mo were 82.1%and 96.4%,respectively.3 patients(1.8%)failed to achieve PVS,while 5 patients(3.0%)developed virological rebound.128 patients(78.5%)maintained CVS throughout follow *** of CVS included lower baseline DNA level(P=0.001),hepatitis B virus e antigen negative status(P=0.001)and increasing age at treatment(log rank 0.001).No significant adverse effects were reported necessitating cessation of entecavir. CONCLUSION:Entecavir monotherapy is efficacious and safe in an Australian tertiary care *** and rebound rates are very *** is similar to data from controlled and uncontrolled trials around the world.

关键词： Chronic hepatitis B Entecavir Australia Asia-Pacific Monotherapy Hepatitis B virus Antivirals