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Modeing of a Helicopter with an Under-Slung Load System

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Modeing of a Helicopter with an Under-Slung Load System

A cross-sectional study on compliance with topical glaucoma medication and its associated socioeconomic burden for a Chinese population

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作者： Kary THANAPALAN Toh ming wong Faculty of Engineering Sciences University College London Sino-British College USST

This paper considers modeling and simulation study of a helicopter with an under-slung external load *** models of a single main rotor helicopter and an under-slung load are presented in this *** the two models,a mathematical model for a helicopter carrying an under-slung load is *** combined system model can be used for stability analysis and controller development to improve system performance.

关键词： Modeling Mathematical Model Dynamic System Stability

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International Journal of Ophthalmology(English edition) 2017年第2期10卷 293-299页

作者： Man-Hin Lui Jason Chun Ho Lam Yi Lee Kwong Tak Siu wong Pak Long Cheung Sherri Shun Yan Lai Pak Lun Yuen Wai Yiu Lam Ho Yan Chan Yiu Fai wong Jimmy Shiu ming Lai Kendrick Co Shih Li Ka Shing Faculty of Medicine the University of Hong KongPokfulamHong KongChina Department of Ophthalmology Li Ka Shing Faculty of Medicinethe University of Hong KongPokfulamHongKongChina Department of Ophthalmology Queen Mary HospitalPokfulamHong KongChina

AIM： To estimate the overall drug compliance for local Chinese glaucoma patients on long-term topical ***： This was a retrospective cross-sectional ***-seven primary glaucoma patients from the subspecialty clinic of a publicly-funded tertiary care hospital in Hong Kong completed a questionnaire on compliance with topical glaucoma medication,attitude towards glaucoma and therapy and vision related quality of *** was defined as reporting missing more than or equal to 10% of the prescribed topical glaucoma medication during the 2wk immediately prior to the *** between noncompliance and demographics,attitude,disease and treatment status was *** was estimated with quality of life and direct medical cost involved with *** logistic regression on noncompliance was performed on selected ***： Compliance was calculated as 75%（95% CI： 64%-87%） among 57 subjects（mean age 69 y,female 51%）.No statistical significant relationship was established between noncompliance and any single factors or ***（P=0.048） and forgetfulness（P=0.064） were found to be marginally significant predictive factors on noncompliance in multivariable logistic *** might be related（P=0.130） to poorer self-rated vision-associated quality of *** societal cost of noncompliance was estimated to be over 2510 life-years and US$ 3.7 million ***： The compliance of Chinese glaucoma patients in Hong Kong is comparable to other parts in the world,and carries detrimental impacts on individual and societal *** and forgetfulness are two possible independent predictors for noncompliance.

关键词： glaucoma eye drop compliance quality of life

Variability in local action potential durations, dispersion of repolarization and wavelength restitution in aged wild-type and Scn5a^＋/- mouse hearts modeling human Brugada syndrome

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Journal of Geriatric Cardiology 2016年第11期13卷 930-931页

作者： Gary Tse Sheung Ting wong Vivian Tse Jie ming Yeo Department of Medicine and Therapeutics Faculty of Medicine Li Ka Shing Institute of Health Sciences Faculty of Medicine Chinese University of HongKong Hong Kong China Faculty of Medicine Imperial College London London UK Department of Physiology McGill University Quebec Canada

Brugada syndrome is a primary arrhythmia syndrome characterized by loss-of-function mutations in the SCN5A gene, which encodes for the cardiac Na^＋ channel. In affected individuals, the risk of developing malignant v... 详细信息

关键词： Brugada Conduction Monophasic action potential Mouse Repolarization

Efficient color routing with a dispersion-controlled waveguide array

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Light(Science & Applications) 2013年第1期2卷 220-225页

作者： Yi-Kun Liu Si-Cong Wang Yong-Yao Li Li-Yan Song Xiang-Sheng Xie ming-Neng Feng Zhi-ming Xiao Shao-Zhi Deng Jian-Ying Zhou Jun-Tao Li Kam Sing wong Thomas F Krauss State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China Department of Physics Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina SUPA School of Physics and AstronomyUniversity of St AndrewsSt AndrewsFifeKY169SSUK

Splitting white light into its constituent spectral components has been of interest ever since Newton first discovered the phenomenon of color *** devices have since been conceived to achieve efficient wavelength separation,yet a large number of applications,e.g.,in display technology,still use simple color absorption or rejection filters that absorb or reflect unwanted wavelengths,thus wasting luminous ***,we demonstrate a novel microsized device concept that enables efficient color *** device operation is based on differential material dispersion in a waveguide array,which causes different wavelength signals to couple selectively into appropriate waveguides.A theoretical power delivery of greater than 50%for a tricolor wavelength router is obtained,compared to 33%expected from geometry *** principle of operation is demonstrated experimentally for a dual-color light field,where we achieve a higher than 70%routing efficiency(compared to 50%from geometry),thus highlighting the feasibility of this novel and promising approach.

关键词： color filters dispersion propagation route waveguides

The performance characteristics of prostate-specific antigen and prostate-specific antigen density in Chinese men

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Asian Journal of Andrology 2017年第1期19卷 113-116页

作者： Jeremv YC Teoh Steffi KK Yuen James HL Tsu Charles KW wong Brian SH Ho Ada TL Ng Wai-Kit Ma Kwan-Lun Ho ming-Kwong Yiu Division of Urology Department of Surgery Queen Mary Hospital University of Hong Kong Hong Kong China

We investigated the performance characteristics of prostate-specific antigen （PSA） and PSA density （PSAD） in Chinese men. All Chinese men who underwent transrectal ultrasound-guided prostate biopsy （TRUS-PB） from year 2000 to 2013 were included. The receiver operating characteristic （ROC） curves for both PSA and PSAD were analyzed. The sensitivity, specificity, positive predictive value （PPV） and negative predictive value （NPV） at different cut-off levels were calculated. A total of 2606 Chinese men were included. For the ROC, the area under curve was 0.770 for PSA （P〈 0.001） and 0.823 for PSAD （P〈 0.001）. PSA of 4.5 ng ml^-1 had sensitivity of 94.4%, specificity of 14.1%, PPV of 29.5%, and NPV of 86.9%; PSAD of 0.12 ng ml^-1cc^-1 had sensitivity of 94.5%, specificity of 26.6%, PPV of 32.8%, and NPV of 92.7%. On multivariate logistic regression analyses, PSA cut-off at 4.5 ng ml^-1 （OR 1.61, 95% CI 1.05-2.45, P = 0.029） and PSAD cut-off at 0.12 ng ml^-1 cc^-1 （OR 6.22, 95% CI 4.20-9.22, P 〈 0.001） were significant predictors for prostate cancer detection on TRUS-PB. In conclusion, the performances of PSA and PSAD at different cut-off levels in Chinese men were very different from those in Caucasians. PSA of 4.5 ng ml^-1 and PSAD of O. 12 ng ml^-1 cc^-1 had near 95% sensitivity and were significant predictors of prostate cancer detection in Chinese men.

关键词： Chinese prostate cancer transrectal ultrasound-guided prostate biopsy prostate-specific antigen prostate-specific antigen density

Recent developments in optimal experimental designs for functional magnetic resonance imaging

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World Journal of Radiology 2014年第7期6卷 437-445页

作者： ming-Hung Kao M'hamed Temkit Weng Kee wong School of Mathematical and Statistical Sciences Arizona State University Department of Biostatistics University of California at Los Angeles

Functional magnetic resonance imaging(fMRI)is one of the leading brain mapping technologies for studying brain activity in response to mental *** neuroimaging studies utilizing this pioneering technology,there is a great demand of high-quality experimental designs that help to collect informative data to make precise and valid inference about brain *** paper provides a survey on recent developments in experimental designs for fMRI *** briefly introduce some analytical and computational tools for obtaining good designs based on a specified design selection *** results about some commonly considered designs such as blocked designs,and m-sequences are also ***,we present a recently proposed new type of fMRI designs that can be constructed using a certain type of Hadamard *** certain assumptions,these designs can be shown to be statistically *** future research directions in design of fMRI experiments are also discussed.

关键词： A-optimality Blocked designs Design efficiencies D-optimality Genetic algorithms Hadamard sequences M-sequences

Inversion Optimization Strategy Based on Primitives with Complement Attributes

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Journal of Computer Science & Technology 2021年第5期36卷 1145-1154页

作者： Hui-ming Tian Zhu-Fei Chu Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China

Inverters or logic primitives that have complement attributes are essential to building a logical complement *** and NOR operations which have complement attributes are of high interest for complementary metal-oxidesemiconductor(CMOS)technology,as they can be easily implemented in *** from the logic models used in standard CMOS,several nano-emerging technologies,such as quantum-dot cellular automata(QCA)and spin torque majority gates,are in favor of realizing a majority voter function but imposing difficulties in implementing *** studies pay lots of effort in optimizing the number of inverters in logic representations,whereas the mapping using primitives with complement attributes is not a major *** this paper,we establish a technology mapping method from logic representations to nanotechnology primitives by considering NAND-NOR-Inverter(NNI)and exclusive-NOR(XNOR)*** adopt XOR-Majority Graph(XMG)as a logic *** proposed mapping method is evaluated using the QCA *** results over EPFL benchmark suites show we achieve 11.77%and 30.13%reductions in the area and the number of inverters,respectively.

关键词： inversion optimization quantum-dot cellular automata majority-of-three NAND-NOR-Inverter(NNI)

Charge balance materials for homojunction and heterojunction OLED applications

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Frontiers of Optoelectronics 2009年第4期2卷 435-441页

作者： Louis M.LEUNG Yik-Chung LAW Michael Y.wong Tik-Ho LEE Kin ming LAI Lok-Yee TANG Department of Chemistry and Centre for Advanced Luminescence Materials Hong Kong Baptist University

In a homojunction device, a single organic layer assumes the multiple roles of hole, electron transportation, and emitter. Its ease in processing is highly desirable from the manufacturing point of view. In this paper, we shall describe the synthesis of a range of bipolar small molecules and conductive vinyl polymers for application in homojunction and heterojunction organic light emitting diodes（OLEDs）. The bipolar materials, in general, consist of three basic building blocks: an arylamine, a 1,3,4-oxadiazole, and a polycyclic aromatic moiety. The achievement of charge balance can be validated either by direct measurement of electron/hole mobility or indirectly via optimization of device properties.A series of conductive vinyl copolymers containing hole transporting N-（4-methoxyphenyl）-N-（4-vinylphenyl）naphthalen-1-amine（4MeONPA） and electron transporting 2-phenyl-5-（4-vinylphenyl）-1,3,4-oxadiazole（OXA）at different compositions was applied for heterojunction and homojunction OLEDs. For heterojunction devices employed the copolymers as the hole transporting layer and Alq3as the electron transporting and emitting layer,a maximum luminance and current efficiency of over 23000 cd/m2and 4.2 cd/A（PL of Alq3）, respectively, were achieved at the charge balance composition. Homojunction devices for the copolymers were demonstrated by the addition of rubrene as a dopant. The single layer devices at the optimal copolymer composition has ca 1500 cd/m2and 0.74 cd/A.

关键词： homojunction devices charge balance bipolar small molecules conductive vinyl copolymers

Rare case of intussusception in an adult with acute myeloid leukemia

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World Journal of Gastroenterology 2015年第2期21卷 688-693页

作者： Man Fai Law Cheuk Kei wong Chun Yin Pang Hay Nun Chan Ho Kei Lai Chung Yin Ha Celia Ng Yiu ming Yeung Sze Fai Yip Department of Medicine Tuen Mun Hospital Department of Medicine and Therapeutics Prince of Wales Hospital Department of Radiology Kwong Wah Hospital Department of Pathology Tuen Mun Hospital

Intussusception is rarely reported in adult patients with acute leukemia. We report a case of intussusception in a 29-year-old woman with acute myeloid leukemia(AML). She developed right lower quadrant pain, fever, and vomiting on day 16 of induction *** examination showed tenderness and guarding at the right lower quadrant of the abdomen. Abdominal computed tomography(CT) showed distension of the cecum and ascending colon, which were filled with loops of small bowel, and herniation of the ileocecal valve into the cecum. We proceeded to laparotomy and revealed ileocecal intussusception with the ileocecal valve as the leading point. The terminal ileum was thickened and invaginated into the cecum, which showed gangrenous changes. Right hemicolectomy was performed and microscopic examination of the colonic tissue showed infiltration of leukemic cells. The patient recovered after the operation and was subsequently able to continue treatment for AML. This case demonstrates that the diagnosis of intussusception is difficult because the presenting symptoms can be non-specific, but abdominal CT can be informative for preoperative diagnosis. Resection of the involved bowel is recommended when malignancy is suspected or confirmed. Intussusception should be considered in any leukemia patients presenting with acute abdomen. A high index of clinical suspicion is important for early diagnosis.

关键词： Intussusception Acute leukemia Abdominal pain Colo