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用于ERIS的GPS转发器处理系统

遥测遥控 1991年第4期12卷 61-65页

作者： Sultan mahmood Phd. Sverdrup Technology INC. Eglin AFB FL 韦其宁

本文描述基于转发器处理系统(TPS)的全球定位系统(GPS)的要求、设计特点及其能力。该转发器处理系统是由爱格林空军基地的靶场应用联合工程办公室(RAJPO)为美军战略防御指挥(USASDC)的重返外大气层再入飞行器拦截器子系统(ERIS)计划而... 详细信息

本文描述基于转发器处理系统(TPS)的全球定位系统(GPS)的要求、设计特点及其能力。该转发器处理系统是由爱格林空军基地的靶场应用联合工程办公室(RAJPO)为美军战略防御指挥(USASDC)的重返外大气层再入飞行器拦截器子系统(ERIS)计划而建立的。TPS 为 ERIS 实验计划提供目标和拦截飞行器的实时位置和速度信息。为了实现这一目的,弹载转发器提供 GPS C/A 码 L 波段到 S 波段的信号转换,并重发给地面 TPS。地面发射机(GT)网用于增加 GPS 卫星(SV)覆盖域。TPS 测量包括“伪距离和”与“伪距离和的变化率”并借助 GPS 参考接收机(RR)进行差分 GPS 修正。快速相关捕获和快速付里叶变换(FFT)技术用于满足相当严格的性能要求。设计用于动态的和弹道飞行的两种卡尔曼滤波器,来满足目标和拦截器的不同精度要求。TPS 还有其它一些功能,例如,检前记录器(用于事后分析)和动态模拟信号源(用于飞行前检查)。

关键词： GPS 转发器数据处理系统

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蜂窝钢骨混凝土异形柱梁柱节点抗震性能研究

蜂窝钢骨混凝土异形柱梁柱节点抗震性能研究

第二十届全国现代结构工程学术研讨会

作者：张化冰周航张俞昕 mahmood SHAHID 徐亚丰沈阳建筑大学土木工程学院

蜂窝钢骨混凝土异形柱梁柱节点具有良好的延性和承载能力,常应用于高层建筑和复杂结构,为了更为准确、全面地把握蜂窝钢骨混凝土异形柱梁柱节点的抗震性能,对其进行有限元数值模拟是一种行之有效的手段。本文利用ABAQUS有限元分析软件... 详细信息

蜂窝钢骨混凝土异形柱梁柱节点具有良好的延性和承载能力,常应用于高层建筑和复杂结构,为了更为准确、全面地把握蜂窝钢骨混凝土异形柱梁柱节点的抗震性能,对其进行有限元数值模拟是一种行之有效的手段。本文利用ABAQUS有限元分析软件对蜂窝钢骨混凝土异形柱梁柱节点进行非线性有限元数值模拟,通过改变含钢率、混凝土强度等主要参数变化对试件进行抗震分析,对比滞回曲线、骨架曲线、承载能力与刚度退化、耗能能力等性能的影响。结果表明蜂窝钢骨混凝土异形柱梁柱节点具有良好的抗震性能与耗能能力;承载力及刚度退化缓慢;在一定范围内含钢率的提高可以使试件的初始刚度、极限承载能力、延性、耗能能力均得到提高。

关键词：梁柱节点抗震性能 ABAQUS有限元分析钢骨混凝土异形柱

Absorption of methionine sources in animals-is there more to know?—— Clarification

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Animal Nutrition 2023年第3期14卷 69-69页

作者： Philippe Becquet Mercedes Vazquez-Anon Yves Mercier Dolores I.Batonon-Alavo Frances Yan Karen Wedekind Tahir mahmood IMAA BrusselsBelgium Novus International Saint CharlesMissouriUSA Adisseo France SAS AntonyFrance

Our publication on absorption of methionine sources(Becquet et al.,2023a)is a thorough analysis of 129 references dealing with absorption of sources of methionine,with the objective to critically evaluate the methodologies used and their impact on the conclusions of the *** the focus of our publicationwas on the evaluation of absorption,efficacy studies and reports not having information on absorption were not considered(Elwert et al.,2008;Rychen et al.,2008).

关键词： absorption dealing conclusions

Methods for improving colorectal cancer annotation efficiency for artificial intelligence-observer training

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World Journal of Radiology 2023年第12期15卷 359-369页

作者： Matthew Grudza Brandon Salinel Sarah Zeien Matthew Murphy Jake Adkins Corey T Jensen Curtis Bay Vikram Kodibagkar Phillip Koo Tomislav Dragovich Michael A Choti Madappa Kundranda Tanveer Syeda-mahmood Hong-Zhi Wang John Chang School of Biological Health and Systems Engineering Arizona State UniversityTempeAZ 85287United States Department of Radiology Banner MD Anderson Cancer CenterGilbertAZ 85234United States School of Osteopathic Medicine A.T.Still UniversityMesaAZ 85206United States Department of Abdominal Imaging MD Anderson Cancer CenterHoustonTX 77030United States Department of Abdominal Imaging University Texas MD Anderson Cancer CenterHoustonTX 77030United States Department of Interdisciplinary Sciences A.T.Still UniversityMesaAZ 85206United States School of Biological and Health Systems Engineering Arizona State UniversityTempeAZ 85287United States Division of Cancer Medicine Banner MD Anderson Cancer CenterGilbertAZ 85234United States Department of Surgical Oncology Banner MD Anderson Cancer CenterGilbertAZ 85234United States IBM Almaden Research Center IBMSan JoseCA 95120United States

BACKGROUND Missing occult cancer lesions accounts for the most diagnostic errors in retrospective radiology reviews as early cancer can be small or subtle,making the lesions difficult to *** is the most effective technique for reducing these events and can be economically implemented with the advent of artificial intelligence(AI).AIM To achieve appropriate AI model training,a large annotated dataset is necessary to train the AI *** goal in this research is to compare two methods for decreasing the annotation time to establish ground truth:Skip-slice annotation and AI-initiated *** We developed a 2D U-Net as an AI second observer for detecting colorectal cancer(CRC)and an ensemble of 5 differently initiated 2D U-Net for ensemble *** model was trained with 51 cases of annotated CRC computed tomography of the abdomen and pelvis,tested with 7 cases,and validated with 20 cases from The Cancer Imaging Archive *** sensitivity,false positives per case,and estimated Dice coefficient were obtained for each method of *** compared the two methods of annotations and the time reduction associated with the *** time differences were tested using Friedman’s two-way analysis of *** Sparse annotation significantly reduces the time for annotation particularly skipping 2 slices at a time(P<0.001).Reduction of up to 2/3 of the annotation does not reduce AI model sensitivity or false positives per *** initializing human annotation with AI reduces the annotation time,the reduction is minimal,even when using an ensemble AI to decrease false *** Our data support the sparse annotation technique as an efficient technique for reducing the time needed to establish the ground truth.

关键词： Artificial intelligence Colorectal cancer Detection

Preoperative embolization of skull-base tumors: Indications, utility, and concerns

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Journal of Acute Disease 2019年第3期8卷 89-94页

作者： Luis Rafael Moscote-Salazar Ali Adnan Dolachee Alexis Narvaez-Rojas Hayder Ali Al-Saadi Arjan A.Najim Aysar Khudhair jassam Alyaa Khadim Abdulreda Ali Odai mahmood Haya Jasim Mohammed Samer S.Hoz University of Cartagena Cartagena de IndiasColombia Department of Surgery College of MedicineUniversity of Al-QadisiyahIraq Department of Neurosurgery Universidad Nacional Autonoma de NicaraguaManaguaNicaragua Department of Neurosurgery Neurosurgery Teaching HospitalBaghdadIraq

Skull-base tumors are generally difficult to access compared with many other cranial lesions. Usually surgery remains the gold standard treatment for the majority of these tumors. However, in many cases, surgical resection is a challenge because the disease usually is already in the advanced stage by the time of diagnosis. Additionally, there are hypervascular lesions which cause excessive loss of blood, then results in multiple blood transfusions and prolonged operative time, increases the risk of neural injury and prevents complete excision. In order to reduce blood loss intraoperatively, many alternatives were available with the neurosurgical armamentarium, such as head elevation, intravenous use of tranexamic acid, total intravenous anesthesia and even preoperative embolization of tumors. However, preoperative embolization carries variable results, potentially aggravating edema and increasing tumor size. To ascertain the current status and the up-to-date indications, an evaluation of the therapeutic role of preoperative embolization was performed in the current study.

关键词： Pre-operative Embolization Skull-base tumors

In utero and exo utero fetal surgery on histogenesis of organs in animals

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World Journal of Surgical Procedures 2015年第2期5卷 198-207页

作者： Esrat Jahan Ashiq mahmood Rafiq Hiroki Otani Department of Developmental Biology Faculty of Medicine Shimane University

Until recently, fetal surgery was only used for fetuses with very poor prognosis who were likely to die without intervention. With advances in imaging, endoscopic techniques, anesthesia and novel interventions, fetal surgery is becoming a realistic option for conditions with less severe prognoses, where the aim is now to improve quality of life rather than simply allow survival. Until forty years ago, the uterus shielded the fetus from observation and therapy. Rapid changes in the diagnosis and treatment of human fetal anatomical abnormalities are due to improved fetal imaging studies, fetal sampling techniques(e.g., amniocentesis and chorionic villus sampling), and a better understanding of fetal pathophysiology derived from laboratory animals. Fetal therapy is the logical culmination of progress in fetal diagnosis. In other words, the fetus is now a patient. Now-a-days, in utero(IU) and exo utero(EU) surgical methods are popular for experimental analyses of the histogenesis of organ development. Using these surgical methods, developmental anomalies can be created and then repaired. By applying microinjection and/or fetal surgery with these methods, models of developmental anomalies such as neural tube defects, temporomandibular joint defects, hip joint defects, digit amputation, limb and digit development and regeneration, and tooth germ transplantation in the jaw could be created and later observed. After observing different types of anomalies, novel IU and EU surgical techniques would be the best approach for repairing or treating those anomalies or diseases. This review will focus on the rationale for the IU and EU creation of animal models of different organ defects or anomalies and their repair, based on analyses of organ histogenesis and pathologic observations. It will also focus in detail on the surgical techniques of both IU and EU methods.

关键词： Myelomeningocele Microinjection Rodent Sheep Neural tube defect Temporomandibular joint Fetal surgery In utero Exo utero

Lysophosphatidylcholine acyltransferase 3 knockdown-mediated liver lysophosphatidylcholine accumulation promotes VLDL production by enhancing MTTP expression

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Lysophosphatidylcholine acyltransferase 3 knockdown-mediated...

第11届全国脂质与脂蛋白学术会议

作者： Zhiqiang Li Tingbo Ding Xiaoyue Pan Yan Li Ruohan Li Philip E.Sanders Ming-Shang Kuo M.mahmood Hussain Guoqing Cao Xian-Cheng Jiang Department of Cell Biology SUNY Downstate Medical Center Department of Biochemistry School of PharmacyFudan University Lilly Research Laboratories Eli Lilly ＆ CompanyIndianapolisIndiana Lilly Research Laboratories Eli Lilly & CompanyIndianapolisIndiana

After de novo biosynthesis phospholipids undergo extensive remodeling by the Lands’ *** involved in phospholipid biosynthesis have been studied extensively but not those involved in of *** key enzyme in the Lands’ Cycle is fatty acyl-CoA:lysophosphatidylcholine acyltransferase(LPCAT) which utilizes lysophosphatidylcholine(LysoPC) and fatty acyl-CoA to produce various phosphatidylcholine(PC) *** isoforms of LPCAT have been *** this study,we found that LPCAT3 is the major hepatic isoform and its knockdown signifcnatly reduces heptic LPCTA ***,we report that hepatic

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中国云南吸毒和HCV/HIV-1共同感染人群中HCV基因型的分布以及一种新的HCV亚型6u的发现(英文)

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中国云南吸毒和HCV/HIV-1共同感染人群中HCV基因型的分布以及一种...

第七届全国病毒学学术研讨会暨第二届武汉现代病毒学国际研讨会

作者： Tee Kok Keng Muhammad mahmood Mukhtar Curt H.Hagedorn Yutaka Takebe Laboratory of Molecular Virology and Epidemiology AIDS Research CenterNational Institute of Infectious DiseaseShinjuku-KuTokyo 162-8640Japan State Key Laboratory of Virology College of Life SciencesWuhan UniversityWuhan 430072China Division of Gastroenterology-Hepatology and Nutrition School of MedicineUniversity of UtahSalt Lake CityUT 84132

The Yunnan province is the epicenter of HIV-1 epidemic in China and a center for drug trafficking to the other parts of the *** six prefectures of this province,a total of 132 IDUs were recruited to determine the sero...

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Improving Growth Performance of Jatropha curcas by Inducing Polyploidy through Colchicine Treatment

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American Journal of Plant Sciences 2016年第6期7卷 769-772页

作者： Syed Amir Manzoor Asim Riaz Tanzeela Zafar Muhammad Hassan Hafiz Muhammad Imran Umar Javed Hassan Waseem Alam Saleh Muhammad Mudassir mahmood Hamza Sohail Tanveer Aslam Feehan Hassan Fahim Abbas Muhammad Faseeh Iqbal Department of Forestry Bahauddin Zakariya University Multan Pakistan Department of Pharmacy Health and Well-Being University of Sunderland Sunderland UK Centre of Agricultural Biochemistry and Biotechnology Faculty of Agriculture University of Agriculture Faisalabad Pakistan Department of Plant Breeding & Genetics Bahauddin Zakariya University Multan Pakistan Department of Entomology Bahauddin Zakariya University Multan Pakistan Department of Horticulture Bahauddin Zakariya University Multan Pakistan Nanjing Agriculture University Nanjing China Department of Soil Science Bahauddin Zakariya University Multan Pakistan

This study was planned to assess genetic variation in Jatropha curcas as affected by colchichine treatments. During the experiment, seeds of Jatropha curcas were collected from mature and healthy Jatropha plants and were soaked in different concentrations of colchicines. The second treatment was that of time of soaking (seeds were soaked in different concentrations for different time durations). The results clearly revealed that by increasing the concentration of colchicine treatment, parameters like stomatal density, and size of the guard cells were reduced.

关键词： Jatropha Polyploidy Colchicine Biofuel