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Study of the Dynamic Characteristics of A Cone-Shaped Recovery System on Submarines for Recovering Autonomous Underwa.er Vehicle

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china Ocean Engineering 2020年第3期34卷 387-399页

作者： MENG Ling-shuai LIN Yang GU Hai-tao SU Tsung-chow State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110016China University of chinese Academy of Sciences Beijing 100049China Florida Atlantic University Boca RatonFL 33431USA

National navies equip their submarines with Autonomous Underwa.er Vehicle(AUV)*** has become an important component of submarine development in technologically-advanced *** advanced and reliable recovery systems directly improves the safety and operational efficiency of submarines equipped with *** this paper,based on aerial refueling technology,a cone-shaped recovery system with two different guiding covers(closed structure and frame structure)is applied to the *** taking the Suboff model as the research object,STAR-CCM wa. used to study the influence of the installation position of the recovery system,and the length of the rigid rod,on the Suboff *** wa. found that when the recovery system is installed in the middle and rear of the Suboff model at the same velocity and the same length of the rigid rod,the Suboff model has the good stability and less *** experiences the largest drag when being installed in the front of the rigid ***,when the recovery system is installed in the front and middle of the rigid rod,the drag increases as its length increases,and the lift decreases as its length *** with the closed structure guiding cover,the Suboff model will have less drag and better stability when the recovery system uses the frame structure guiding ***,the deflection and vibration of the rigid rod were also analyzed via mathematical theory.

关键词： cone-shaped recovery system submarine computational fluid dynamics(CFD) hydrodynamics deflection vibration

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An update on electrostatic powder coating for pharmaceuticals

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Particuology 2017年第2期15卷 1-7页

作者： Qingliang Yang Yingliang Ma Jesse Zhu Kwok chow Kaiqi Shi Particle Technology Research Centre Department of Chemical and Biochemical Engineering University of Western Ontario London Ontario N6A 589 Canada Powder Pharma Coatings Mississauga Ontario LSR 2Y9 Canada Ningbo Weston Powder Pharma Coatings Co. Ltd. Ningbo Zhejiang 315042 China

Derived from dry powder coating of metals, electrostatic powder coating for pharmaceuticals is a technology for coating drug solid dosage forms. In this technology, coating powders, containing coating polymers, pigments, and other excipients, are directly sprayed onto the surface of the solid dosage forms through an electrostatic gun without using any organic solvent or wa.er. The deposited coating powders are further cured to form a coating film. Electrostatic powder coating technology has many advantages compared to other pharmaceutical coating methods. It can eliminate the limitations caused by the organic solvent in solvent coating such as environmental issues and health problems. And electrostatic powder coating technology also surpasses aqueous coating due to its shorter processing time and less energy consumption, leading to a lower overall cost. Furthermore, the utilization of electrical attraction can promote the movement of coating powders towa.ds the substrate, leading to an enhanced coating powder adhesion and coating efficiency, which make it more promising compared to other dry coating technologies. The objective of this review is to summarize the coating principles, apparatus, and formulations of different electrostatic powder coating technologies, giving their advantages and limitations and also analyzing the future application in the industry for each technology

关键词： Electrostatic powder coating Solid dosage forms Plasticizers Powder adhesion Film formation Curing

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Surface Measurement Using Compressed wa.efront Sensing

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Photonic Sensors 2019年第2期9卷 115-125页

作者： Eddy Mun Tik chow Ningqun GUO Edwin CHONG Xin wa.G School of Engineering Monash University Malaysia Jalan Lagoon SeiatanBandar Sunway 47500Malaysia Department of Electrical and Computer Engineering Colorado State UniversityFort Collins CO 80623USA

Compressed sensing leverages the sparsity of signals to reduce the amount of measurements required for its reconstruction. The Shack-Hartmann wa.efront sensor meanwhile is a flexible sensor where its sensitivity and dynamic range can be adjusted based on applications. An investigation is done by using compressed sensing in surface measurements with the Shack-Hartmann wa.efront sensor. The results show that compressed sensing paired with the Shack-Hartmann wa.efront sensor can reliably measure surfaces accurately. The performance of compressed sensing is compared with those of the iterative modal-based wa.efront reconstruction and Fourier demodulation of Shack-Hartmann spot images. Compressed sensing performs comparably to the modal based iterative wa.efront reconstruction in both simulation and experiment while performing better than the Fourier demodulation in simulation.

关键词： Shack-Hartmann wa.efront sensor surface measurement compressed sensing

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Impacts of LED spectral quality on leafy vegetables:Productivity closely linked to photosynthetic performance or associated with leaf traits?

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International Journal of Agricultural and Biological Engineering 2019年第6期12卷 16-25页

作者： Jie He Lin Qin wa. Soon chow National Institute of Education Nanyang Techological University1 Nanyang WalkSingapore 637616 Division of Plant Sciences Research School of BiologyThe Australian National University46 Sullivans Creek RoadACTONACT 260lAustralia

The success of growing vegetables indoors requires the most appropriate selection of lighting *** mini review discusses the impacts of LED spectral quality on different leafy vegetables with a focus on the studies of chinese broccoli(Brassica alboglabra),ice plants(Mesembryanthem crystallinum)and lettuce(Lactuca sativa ***).For each species,plants exposed to different spectral LED lights were all under the same light intensity and same *** broccoli grown under red(R):blue(B)-LED ratio of 84:16(16B)had the highest light-saturated photosynthetic CO_(2) assimilation rate(Asat)and stomatal conductance(gs sat)compared to plants grown under other R:B-LED *** wa. also shown that 16B is the most appropriate selection for chinese broccoli to achieve the highest shoot productivity with a rapid leaf number and leaf area *** highest concentrations of photosynthetic pigments,soluble and Rubisco protein on a leaf area basis were also observed in 16B *** results conclusively affirmed that the highest productivity of chinese broccoli grown under 16B is closely linked to the highest photosynthetic performance on a leaf area *** ice plants grown under R:B-LED ratios of 90:10(10B),they had the highest shoot biomass with a faster leaf development compared to plants grown under other RB-LED ***,there were no differences in Asat,gs sat,photosynthetic pigments,soluble and Rubisco proteins on a leaf area *** the case of lettuce plants,it wa. a surprise to observe that plants grown under 0B and 20G(20%green(G)-LED and 80%R-LED)had the highest shoot biomass,and largest total leaf area and light interception area but the lowest net maximal photosynthetic rate on a leaf area basis,compared to other *** combined RB-LED enhanced other photosynthetic parameters while 0B and 20G conditions had inhibitory effects on maximum quantum efficiency of PS II with lower photosynthetic pigments,total soluble prote

关键词： leafy vegetable leaf traits LED spectral quality photosynthetic performance productivity

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Laparoscopic complete mesocolic excision: West meets East

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World Journal of Gastroenterology 2014年第39期20卷 14301-14307页

作者： Carina F K chow Seon Hahn Kim Division of Colorectal Surgery Departmentof SurgeryRoyal Brisbane and Women’s HospitalBrisbaneQueensland 4029 Australia Department of General Surgery Mater Hospital South Brisbane Brisbane Queensland 4101 Australia Department of Surgery University of Queensland Brisbane Queensland 4072 Australia Colorectal Division Department of SurgeryKorea University Anam Hospital Anam-dongSeongbuk-gu Seoul 136-705 South Korea

Complete mesocolic excision is a relatively new concept in western literature. It follows the same concept of total mesorectal excision and units’ routinely performing complete mesocolic excisions have good pathological results as well as good improvements in overall survival, disease free survival and local recurrence. And yet unlike total mesorectal excision, uptake in the West has been relatively slow with many units sceptical of the true benefits gained by taking up a more technically challenging and potentially more morbid procedure when there is a paucity of literature to support these claims. This article reviews complete mesocolic excision for colon cancer, attempting to identify the risks and benefits of the technique and particularly looking at the reasons why its uptake has not been universal. It also discusses the similarities of a complete mesocolic excision to a colon resection with a D3 lymphadenectomy as well as the role of a laparoscopic approach to this technique. Considering a D3 lymphadenectomy has been the standard of care for stage II and III colon cancers in many of our Asian neighbours for over 20 years, combining this data with data on complete mesocolic excision may provide enough evidence to support or refute the need for complete mesocolic excisions. Maybe there might be lessons to be learnt from our colleagues in the east.

关键词： Complete mesocolic excision Colorectal surgery Laparoscopy Colonic neoplasms D3 lymphadenectomy

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Accelerated Approach to the Synthesis of Fluoriated Polyether Dendrimers

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chinese Chemical Letters 1998年第9期9卷 809-812页

作者： Cao, XP Li, XH chow, HF Li, Y Lanzhou Univ Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China chinese Univ Hong Kong Dept Chem Shatin NT Hong Kong

Fluorinated polyether dendritic sectors 4, 7 and 10 from the first to the third generations, respectively, were prepared by a convergent approach from readily available pentafluorophenol, phloroglucinol and 1,3-dibromopropane. These dendritic sectors have good solubility properties and are stable in both acidic and basic media. Hence they are useful dendritic building blocks for the preparation of functional dendrimers.

关键词： synthesis fluoriated polyether dendrimers

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Solutions to Buoyancy-Drag Equation for Dynamical Evolution of Rayleigh-Taylor and Richtmyer-Meshkov Mixing Zone

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Communications in Theoretical Physics 2011年第10期56卷 751-755页

作者： W.K.chow N.K.Fong Department of Building Services Engineering The Hong Kong Polytechnic UniversityHung HornKowloonHong KongChina

With a self-similar parameter b（At） = Hi/λi, where At is the Atwood number, Hi and λi are the *** and wa.elength of bubble （i = 1） and spike （i = 2） respectively, we derive analytically the solutions to the buoyancy-drag equation recently proposed for dynamical evolution of Rayleigh-Taylor and Richtmyer-Meshkov mixing zone. Numerical solutions are obtained with a simple form ofb（At）--- 1/（1 ＋ At） and comparisons with recent LEM （linear electric motor） experiments are made, and an agreement is found with properly chosen initial conditions.

关键词： Buoyancy-Drag equation Rayleigh Taylor mixing Richtmyer Meshkov mixing

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TOwa.DS A HUMAN DIGNITY BASED APPROACH TO FOOD SECURITY： LESSONS FROM chiNA AND INDIA

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Frontiers of Law in china-Selected Publications from chinese Universities 2016年第2期11卷 243-265页

作者： Nandini Ramanujam Stephanie chow Faculty of Law McGill University Centre of Human Rights and Legal Pluralism at McGill University MontrealCanada

Despite almost halving the proportion of the world＇s undernourished over the past two and half decades, the number of undernourished people in the world remains staggeringly high. Efforts to address the global state of food insecurity must target china and India, which are home to the world＇s highest and second highest number of undernourished people. This article analyzes the comparative experiences of tackling food security in china and India and adopts an inter-disciplinary approach, which melds legal, economic, and human perspectives to food security. Both china and India have made concerted efforts to improve food security of vulnerable populations in the past three decades. These efforts have historically focused on actively promoting grain production, which has been largely successful in achieving grain self-sufficiency and securing adequate availability of food for their populations. However, the contemporary challenges to food security are now increasingly driven by unsustainable dietary patterns and are exacerbated by growing populations, increasing wealth, and the globalization of food supply chains. As a result, the cause of food insecurity is no longer fundamentally about food supply, but rather about the extent to which marginalized populations are empowered with the rights, freedoms, and capabilities that enable them to attain healthy and productive lives. china and India apply markedly different approaches to address the issue of people＇s access to food. In India, the right to food movement has gained momentum through the work of civil society actors and there is now a legal right to food. In contrast, in china the right to food is neither stipulated in chinese law nor referenced to in the official policy rhetoric as the country seeks to ensure access to food by focusing on poverty alleviation more generally through an income transfer program and a non-food based, social safety net to help the poor. At the same time, the chinese population＇s high edu

关键词： food security human dignity human capabilities right to food

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Effects of music and video on perceived exertion during high-intensity exercise

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Journal of Sport and Health Science 2017年第1期6卷 81-88页

作者： Enoch C.chow Jennifer L.Etnier Department of Kinesiology University of North Carolina at GreensboroGreensboroNC 27412USA

Background: Dissociative attentional stimuli(e.g., music, video) are effective in decreasing ratings of perceived exertion(RPE) during low-tomoderate intensity exercise, but have inconsistent results during exercise at higher intensity. The purpose of this study wa. to assess attentional focus and RPE during high-intensity exercise as a function of being exposed to music, video, both(music and video), or a no-treatment control ***: During the first session, healthy men(n = 15) completed a maximal fitness test to determine the workload necessary for high-intensity exercise(operationalized as 125% ventilatory threshold) to be performed during subsequent sessions. On 4 subsequent days, they completed 20 min of high-intensity exercise in a no-treatment control condition or while listening to music, wa.ching a video, or both. Attentional focus, RPE,heart rate, and distance covered were measured every 4 min during the ***: Music and video in combination resulted in significantly lower RPE across time(partial η~2= 0.36) and the size of the effect increased over time(partial η~2= 0.14). Additionally, music and video in combination resulted in a significantly more dissociative focus than the other conditions(partial η~2= 0.29).Conclusion: Music and video in combination may result in lower perceived exertion during high-intensity exercise when compared to music or video in isolation. Future research will be necessary to test if reductions in perceived exertion in response to dissociative attentional stimuli have implications for exercise adherence.

关键词： Acute exercise Attentional focus Effort Perceived exertion

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Asymptotic dynamics of a modified discrete Leslie-Gower competition system

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International Journal of Biomathematics 2017年第6期10卷 1-23页

作者： Yunshyong chow Sophia R.-J. Jang Institute of Mathematics Academia Sinica Taipei 10617 Taiwan Department of Mathematics and StatisticsTexas Tech University Lubbock TX 79409-1042 USA

We propose a modified discrete-time Leslie-Gower competition system of two popula- tions to study competition outcomes. Depending on the magnitude of a particular model parameter that measures intraspecific competition between individuals within the same population, either one or both populations may be subject to Allee effects. The resulting system can have up to four coexisting steady states. Using the theory of planar compet- itive maps, it is shown that the model has only equilibrium dynamics. The competition outcomes then depend not only on the parameter regimes but may also depend on the initial population distributions.

关键词： Competition saddle points Allee effects.

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