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Numerical evaluation on sub-Nyquist spectrum reconstruction methods

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Frontiers of Computer Science 2023年第6期17卷 199-201页

作者： Zihang SONG Han ZHANG Sean FULLER andrew lambert Zhinong YING Petri MAHONEN Yonina ELDAR Shuguang CUI Mark DPLUMBLEY Clive PARINI Arumugam NALLANATHAN Yue GAO Department of Engineering King’s College LondonStrandLondon WC2R 2LSUK School of Computer Science and Electronic Engineering University of SurreyGuildfordSurrey GU27XHUK National Instruments Corporation(UK)Ltd. NewburyBerkshire RG142PZUK Electronic Media Services Ltd. BordonHampshire GU350FJUK Sony Research Center Sony CorporationLund 22188Sweden Institute for Networked Systems RWTH Aachen UniversityKackertstrasseAachen 52072Germany Faculty of Math&CS Weizmann Institute of ScienceRehovot 7610001Israel School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China School of Electronic Engineering and Computer Science Queen Mary University of LondonLondon E14NSUK School of Computer Science Fudan UniversityShanghai 200433China

1 Introduction As wireless technology continues to expand,there is a growing concern about the efficient use of spectrum *** though a significant portion of the spectrum is allocated to licensed primary users(PUs),studies indicate that their actual utilization is often limited to between 5%to 10%[1].The underutilization of spectrum has given rise to cognitive radio(CR)technology,which allows secondary users(SUs)to opportunistically access these underused resources[2].However,wideband spectrum sensing,the key of CR,is limited by the need for high-speed analog-to-digital converters(ADCs),which are costly and *** spectrum sensing(CSS)addresses this challenge by employing sub-Nyquist rate *** efficiency of active transmission detection heavily depends on the quality of spectrum reconstruction.

关键词： spectrum continue Nyquist

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世界著名沉船事件之一玛丽号

海外英语 2006年第3期 8-9页

作者： andrew lambert

　　Theat from the sea来自大海的威胁　　The Mary Rose was built at Portsmouth between 1509 and *** for Henry Ⅷ's favourite sister,Mary Tudor,later queen of France,the ship was part of a large build-up of naval force by the new king in the years between 1510 and ***,and the cannon they carried,were the ultimate status symbol of the 16th century,and an opportunity to show off the wealth and power of the king abroad.　　……

关键词：世界著名沉船大海

Post-operative protein supplementation following orthopaedic surgery: A systematic review

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Sports Medicine and Health Science 2024年第1期6卷 16-24页

作者： andrew George Brendan M.Holderread Bradley S.lambert Joshua D.Harris Patrick C.McCulloch Houston Methodist Orthopedics and Sports Medicine 6445 Main Street Suite 2300HoustonTX77030USA Houston Methodist Orthopedic Biomechanics Research Laboratory 6670 Bertner AveHoustonTX77030USA

Decreased mechanical loading after orthopaedic surgery predisposes patients to develop muscle *** purpose of this review was to assess whether the evidence supports oral protein supplementation can help decrease postoperative muscle atrophy and/or improve patient outcomes following orthopaedic surgery.A systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and MetaAnalysis(PRISMA).PubMed(MEDLINE),Embase,Scopus,and Web of Science were searched for randomized controlled trials that assessed protein or amino acid supplementation in patients undergoing orthopaedic *** investigators independently conducted the search using relevant Boolean *** outcomes included functional or physiologic measures of muscle atrophy or *** studies including 611 patients(224 males,387 females)were *** studies evaluated protein supplementation after ACL reconstruction(ACLR),3 after total hip arthroplasty(THA),5 after total knee arthroplasty(TKA),and 3 after surgical treatment of hip *** supplementation showed beneficial effects across all types of *** primary benefit was a decrease in muscle atrophy compared to placebo as measured by muscle cross sectional *** authors also demonstrated improved functional measures and quicker achievement of rehabilitation *** supplementation has beneficial effects on mitigating muscle atrophy in the postoperative period following ACLR,THA,TKA,and surgical treatment of hip *** effects often correlate with improved functional measures and quicker achievement of rehabilitation *** research is needed to evaluate long-term effects of protein supplementation and to establish standardized population-specific regimens that maximize treatment efficacy in the postoperative period.

关键词： Orthopaedic surgery Protein supplementation Systematic review Muscle atrophy

A wavelet-based super-resolution method for multi-slice MRI

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Journal of Biomedical Science and Engineering 2012年第12期5卷 862-870页

作者： Rafiqul Islam andrew J. lambert Mark R. Pickering Jennie M. Scarvell Paul N. Smith School of Engineering and Information Technology (SEIT) University of New South Wales Canberra Australia The Trauma and Orthopaedic Research Unit The Canberra Hospital Canberra Australia

In multi-slice magnetic resonance imaging (MRI), the resolution in the slice direction is usually reduced to allow faster acquisition times and to reduce the amount of noise in each 2D slice. To address this issue, a number of super resolution (SR) methods have been proposed to improve the resolution of 3D MRI volumes. Most of the methods involve the use of prior models of the MRI data as regularization terms in an ill-conditioned inverse problem. The use of user-defined parameters produces better results for these approaches but an inappropriate choice may reduce the overall performance of the algorithm. In this paper, we present a wavelet domain SR method which uses a Gaussian scale mixture (GSM) model in a sparseness constraint to regularize the ill-posed SR inverse problem. The proposed approach also makes use of an extension of the Dual Tree Complex Wavelet Transform to provide the ability to analyze the wavelet coefficients with sub-level precision. Our results show that the 3D MRI volumes reconstructed using this approach have quality superior to volumes produced by the best previously proposed approaches.

关键词： Magnetic Resonance Imaging Super Resolution Gaussian Scale Mixture Model Wavelet Regularization

Sub-Nyquist spectrum sensing and learning challenge

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Frontiers of Computer Science 2021年第4期15卷 197-201页

作者： Yue GAO Zihang SONG Han ZHANG Sean FULLER andrew lambert Zhinong YING Petri MAHONEN Yonina ELDAR Shuguang CUI Mark D.PLUMBLEY Clive PARINI Arumugam NALLANATHAN School of Computer Science and Electronic Engineering University of SurreyGuildfordSurrey GU27XHUK National Instruments Corporation(UK)Ltd NewburyBerkshire RG142PZUK Electronic Media Services Ltd BordonHampshire GU350FJUK Sony Research Center Sony CorporationLund 22188Sweden Institute for Networked Systems RWTH Aachen UniversityKackertstrasse 9Aachen 52072Germany Faculty of Math&CS Weizmann institute of ScienceRehovot 7610001Israel School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China School of Electronic Engineering and Computer Science Queen Mary University of LondonLondon E14NSUK

1 Introduction The fact that the spectrum resource is underutilised in certain bands has motivated the dynamic spectrum access(DSA)approach,which enables unlicensed secondary users(SUs)equipped with cognitive radio(CR)devices to access the spectrum without causing significant interference to primary users(PUs).Nowadays,the increasing bandwidth for wireless communication in millimetre-wave and Terahertz frequency bands puts higher requirements on the performance of spectrum sensing technique,the primary enabler of DSA.

关键词： spectrum enable bands

Development of a Simple Extraction Method for Tetracycline Analogues from Bovine Milk

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Advances in Biological Chemistry 2024年第4期14卷 111-120页

作者： Oscar Cordova Thien Le Christopher lambert Devin Brodie Stephany Ramirez Francis Sandoval Karno Ng Department of Chemistry & Biochemistry California State University San Marcos San Marcos USA

Tetracycline and analogues are among the most used antibiotics in the dairy industry. Besides the therapeutic uses, tetracyclines are often incorporated into livestock feed as growth promoters. A considerable amount of antibiotics is released unaltered through milk from dairy animals. The presence of antibiotic residues in milk and their subsequent consumption can lead to potential health impacts, including cancer, hypersensitivity reactions, and the development of antibiotic resistance. Thus, it is important to monitor residual levels of tetracyclines in milk. The purpose of this study is to develop a quick and simple method for simultaneously extracting five tetracycline analogues from bovine milk. Specifically, five tetracycline analogues: Chlortetracycline (CTC), demeclocycline (DEM), doxycycline (DC), minocycline (MC), and tetracycline (TC) were simultaneously extracted from milk using trifluoroacetic acid. Subsequently, the extracted analogues were separated by reverse-phase high-performance liquid chromatography (RP-HPLC) and detected at 355 nm using UV/Vis. Calibration curves for all five tetracycline analogues show excellent linearity (r2 value > 0.99). Percent recovery for MC, TC, DEM, CTC, and DC were: 31.88%, 96.91%, 151.29, 99.20%, and 85.58% respectively. The developed extraction method has good precision (RSD < 9.9% for 4 of the 5 analogues). The developed method with minimal sample preparation and pretreatment has the potential to serve as an initial screening test.

关键词： Antibiotics Tetracyclines Extraction Milk HPLC

Knowledge, Attitudes and Practices of Congolese Women in Kinshasa on Breast Cancer

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Open Journal of Obstetrics and Gynecology 2024年第8期14卷 1207-1222页

作者： Pierre Joseph Ingala Amasa Ernest Ombha Loshima Arsène Mputu Lobota Guy lambert Monzango Sibo Malka Salamo Azama Gracia Tambola Wasinga Dieudonné Omatuku Tshofu Fidèle Djamba Okitokonda Department of Obstetrics and Gynecology University Clinics of Kinshasa Kinshasa DR Congo Public Hospital Group of the South of the Oise Senlis France National Border Hygiene Program of Kinshasa Kinshasa DR Congo

Context: Breast cancer is a high-mortality disease. Early detection has considerably reduced mortality in developed countries. Objectives: To assess the knowledge, attitudes and practices of Congolese women in Kinshasa on breast cancer, their levels and to identify factors associated with insufficient knowledge, negative attitudes and non-beneficial practices. Material and Methods: This was a descriptive cross-sectional study with analytical aims, carried out from June 1 to September 30, 2023, in Kinshasa. It involved 1170 female respondents, aged 18 to 65, who agreed to take part in the survey. Data were collected using a pre-established questionnaire. Data analysis was performed using SPSS software version 20.0. The study variables were socio-demographics, morbid history, knowledge, attitudes and practices of respondents regarding breast cancer. Statistical measures and tests used were Mean ± standard deviation, median, proportions, logistic regression Backward stepwise and p Results: 60% had insufficient knowledge, 75% had negative attitudes and 80% had non-beneficial practices. The risk factors common to insufficient knowledge, negative attitudes and non-beneficial practices towards breast cancer were low level of education, membership of revivalist or Muslim churches, and primiparity. Conclusion: 60% of Congolese women in Kinshasa have insufficient knowledge about breast cancer, 75% have negative attitudes and 80% have non-beneficial practices, with a positive association between insufficient knowledge and negative attitudes on the one hand, and insufficient knowledge and non-beneficial practices on the other. In this context, increasing the population’s literacy and access to information are essential.

关键词： Knowledge Attitudes Practices Breast Cancer Congolese Woman in Kinshasa

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浙江省某县县域医共体抗菌药物管理案例研究

中国社会医学杂志 2024年第4期41卷 391-396页

作者：邓子如董晓莲王伟马聪付朝伟 Helen lambert 王娜严非复旦大学公共卫生学院国家卫健委卫生技术评估重点实验室上海200032 德清县疾病预防与控制中心浙江湖州313200 英国布里斯托大学人口健康科学系布里斯托BS82PS

目的探究浙江省某县县域医共体内部抗菌药物管理政策和措施实施中的经验和问题。方法研究团队于2019年10月及2020年7月赴浙江省某县开展现场调查,通过目的性抽样收集医共体内两家医疗机构的抗菌药物相关数据进行描述性分析,并对四家医... 详细信息

目的探究浙江省某县县域医共体内部抗菌药物管理政策和措施实施中的经验和问题。方法研究团队于2019年10月及2020年7月赴浙江省某县开展现场调查,通过目的性抽样收集医共体内两家医疗机构的抗菌药物相关数据进行描述性分析,并对四家医疗机构中的15名关键知情人进行访谈,了解医共体内抗菌药物管理制度与抗菌药物使用状况。结果案例县县域医共体内机构已成立架构清晰的抗菌药物管理系统;设有前置审方、事后点评、绩效奖惩等管理措施;近年来抗菌药物使用相关指标总体呈下降趋势,县医院门诊、住院抗菌药物使用率均达到国家标准,但县医院住院患者抗菌药物使用强度、乡镇卫生院门诊抗菌药物使用率仍高于国家标准。结论案例县依托县域医共体制度优势,促进医疗机构抗菌药物自上而下管理,管理组织架构清晰,措施较为全面,注重过程管理,动态调整考核指标;但仍需加大对临床药师等专业技术人员的培养,完善抗菌药物管理信息系统。

关键词：抗菌药物管理县域医共体案例研究

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A Review on TSO-DSO Data Exchange,CIM Extensions and Interoperability Aspects

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Journal of Modern Power Systems and Clean Energy 2022年第2期10卷 309-315页

作者： Arsim Bytyqi Siddhesh Gandhi Eric lambert Nejc Petrovic European Network of Transmission System Operators(ENTSO-E) BrusselsBelgium Electricite de France(EDF) ParisFrance Elektro Gorenjska LjubljanaSlovenia

The exchange of information between transmission system operators(TSOs)and distribution system operators(DSOs)is a common ***,the evolution of the regulatory frameworks in Europe has increased the need for enhancing TSO-DSO data exchange and *** paper provides an overview of the TSO-DSO data exchanges and demonstrates the best practices using International Electrotechnical Commission(IEC)common information model(CIM),including the implementation of IEC common grid model exchange standard(CGMES),and discussion of the corresponding advantages,disadvantages,and ***,this paper evaluates and reports the activities already carried out within European projects,with particular focus on TSO-DSO ***,this paper concludes the need for TSOs and DSOs to rely on standard-based solutions when performing TSO-DSO data exchange,which enables the efficient operation and development of the future power systems.

关键词： Transmission system operator(TSO) distribution system operator(DSO) data exchange interoperability standardization common information model(CIM) common grid model exchange standard(CGMES)