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A data-driven indirect method for nonlinear optimal control

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Astrodynamics 2019年第4期3卷 345-359页

作者： Gao Tang kris Hauser Department of Mechanical Engineering and Material Science Duke UniversityDurhamNC 27705USA Department of Electrical and Computer Engineering Duke UniversityDurhamNC 27705USA

Nonlinear optimal control problems are challenging to solve due to the prevalence of local minima that prevent convergence and/or *** paper describes nearest-neighbors optimal control(NNOC),a data-driven framework for nonlinear optimal control using indirect *** determines initial guesses for new problems with the help of precomputed solutions to similar problems,retrieved using k-nearest neighbors.A sensitivity analysis technique is introduced to linearly approximate the variation of solutions between new and precomputed problems based on their variation of *** show that NNOC can obtain the global optimal solution orders of magnitude faster than standard random restart methods,and sensitivity analysis can further reduce the solving time almost by *** are shown on optimal control problems in vehicle control and agile satellite reorientation demonstrating that global optima can be determined with more than 99%reliability within time at the order of 10-100 milliseconds.

关键词： data-driven approach indirect method optimal control sensitivity analysis

How nerve-sparing technique has been applied to radiotherapy？

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Asian Journal of Andrology 2016年第6期18卷 898-899页

作者： kris Prado Arnold I Chin Department of Urology UCLA Los Angeles CA 90095 USA Broad Stem Cell Research Center UCLA Los Angeles CA 90095 USA Jonsson Comprehensive Cancer Center UCLA Los Angeles CA 90095 USA

The introduction of nerve-sparing technique is one of the most significantadvances in the surgical treatment of prostate cancer and heralded a shift from a curing cancer at all-cost model to a curing cancer and preser... 详细信息

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Automated quality inspection of baby corn using image processing and deep learning

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Artificial Intelligence in Agriculture 2024年第1期11卷 61-69页

作者： kris Wonggasem Pongsan Chakranon Papis Wongchaisuwat Department of Industrial Engineering Faculty of EngineeringKasetsart UniversityChatuchakBangkok 10900Thailand

The food industry typically relies heavily on manual operations with high proficiency and *** to the quality inspection process,a baby corn with black marks or blemishes is considered a defect or unqualified class which should be *** inspection and sorting of agricultural products like baby corn are labor-intensive and *** main goal of this work is to develop an automated quality inspection framework to differentiate between‘pass’and‘fail’categories based on baby corn images.A traditional image processing method using a threshold principle is compared with relatively more advanced deep learning ***,Convolutional neural networks,specific sub-types of deep learning models,were *** experiments on choices of network architectures and their hyperparameters were conducted and compared.A Shapley additive explanations(SHAP)framework was further utilized for network interpretation *** EfficientNetB5 networks with relatively larger input sizes yielded up to 99.06%accuracy as the best performance against 95.28%obtained from traditional image *** a region of interest identification,several model experiments,data application on baby corn images,and the SHAP framework are our main *** proposed quality inspection system to automatically differentiate baby corn images provides a potential pipeline to further support the agricultural production process.

关键词： Quality classification Baby corn images Image classification Digital image processing Convolutional neural networks

POWER CONSUMPTION COMPARISON OF FIVE BUILDING ENVELOPES IN THE NORTHERN PRAIRIE CLIMATE OF MANITOBA

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Journal of Green Building 2014年第4期9卷 147-160页

作者： kris J.Dick Hossein Safavian Grant Rayner Director-The Alternative Village Department of Biosystems EngineeringFaculty of EngineeringUniversity of ManitobaRm E1-344 EITC75 Chancellors CircleWinnipegManitobaCanada Department of Biosystems Engineering Faculty of EngineeringUniversity of Manitoba

The energy efficiency of a building depends on building envelope *** results presented in this paper are the first of a long-term building envelope research project at the Alternative Village at the University of Manitoba in Winnipeg,Manitoba,*** test buildings were constructed using the following systems:two wood frames with fiberglass batt insulation and dense pack cellulose,one polyurethane structural insulated panels(PUR SIP),and two with the Stay in place PVC concrete form building system using 102mm and 204mm of concrete externally insulated with 102mm of expanded polystyrene *** of the buildings had a common foundation and roof system with a footprint of 23.8 *** door tests were conducted to determine air *** structure was heated with an electrical resistance heater and maintained at a constant internal *** thermal gradient through the wall and power consumption were *** study period discussed in this report represents the main heating season from October 2011 to April 2012 consisting of 209 *** on the power consumption,the PUR SIP consumed the least at 2498 kWh,while the 204 mm Stay in place PVC concrete form building used the most at 2898 kWh for the same time *** thermal gradient through the cross section of the wood frame structures was compared through the cavity insulation and at the *** was found that the cellulose building provided better thermal resistance along the stud when compared to the fiberglass batt insulation.

关键词： fiberglass insulation cellulose insulation polyurethane structural insulated panels power consumption mass walls

MicroRNAs in Common Human Diseases

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Genomics, Proteomics & Bioinformatics 2012年第5期10卷 246-253页

作者： Yu Li kris V.Kowdley Benaroya Research Institute and Center for Liver Disease Digestive Disease InstituteVirginia Mason Medical Center

MicroRNAs （miRNAs） are a class of short non-coding RNA molecules that have attracted tremendous attention from the biological and biomedical research communities over the past decade. With over 1900 miRNAs discovered in humans to date, many of them have already been implicated in common human disorders. Facilitated by high-throughput genomics and bioinformatics in conjunction with traditional molecular biology techniques and animal models, miRNA research is now positioned to make the transition from laboratories to clinics to deliver profound benefits to public health. Herein, we overview the progress of miRNA research related to human diseases, as well as the potential for miRNA to becoming the next generation of diagnostics and therapeutics.

关键词： MicroRNA Human diseases Diagnostics Therapeutics Biomarker

Expanding the SDI environment:comparing current spatial data infrastructure with emerging indoor location-based services

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International Journal of Digital Earth 2016年第6期9卷 629-647页

作者： David J.Coleman Abbas Rajabifard kris W.Kolodziej Department of Geodesy and Geomatics Engineering University of New BrunswickFrederictonCanada Centre for Spatial Data Infrastructures and Land Administration Department of Infrastructure EngineeringThe University of MelbourneMelbourneAustralia Indoor LBS LLC New YorkNYUSA

The authors compare key elements of the emerging field of Indoor Location-Based Services(Indoor LBS)to those currently found in spatial data infrastructure(SDI)*** a brief review of SDIs and Location-Based Services,the corresponding drivers,characteristics and emerging issues within the field of Indoor LBS are introduced and discussed.A comparative framework relates the two in terms of the criteria‘People’,‘Data’,‘Technologies’,‘Standards’and‘Policies/Institutional Arrangements’.After highlighting key similarities and differences,the authors suggested three areas–definition of common framework datasets in Indoor LBS,more effective use of volunteered geographic information by SDI programs and development of appropriate privacy policies by both communities–that may benefit from sharing‘lessons learned’.

关键词： Spatial data infrastructure location-based services indoor positioning mapping geospatial

Hepatitis B down under:consensus recommendations from the Gastroenterological Society of Australia

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Hepatobiliary Surgery and Nutrition 2023年第5期12卷 768-771页

作者： Vignan Manne kris V.Kowdley Division of Gastroenterology and Hepatology University of NevadaLas Vegas Kirk Kerkorian School of MedicineLas VegasNVUSA Liver Institute Northwest Washington State University SeattleWAUSA

Chronic hepatitis B(CHB)represents a global public burden with an estimated 296 million people infected worldwide(1).It is a leading cause of morbidity and mortality related to chronic liver disease and hepatocellular carcinoma(HCC)(2-5).The prevalence of CHB can range from populations with low prevalence(8%).Current recommendations for screening use a prevalence of over 2%as the cutoff to start screening a population(2-5).Australia has a diverse population in which the prevalence of CHB differs between certain subgroups(6,7).

关键词： Chronic hepatitis B(CHB) guidelines Gastroenterological Society of Australia(GESA)

Current perspectives into the evaluation and management of hepatitis B: a review

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Hepatobiliary Surgery and Nutrition 2019年第4期8卷 361-369页

作者： Vignan Manne Eric Gochanour kris V. Kowdley Liver Care Network Swedish Medical Center Seattle WA USA

Hepatitis B is a widespread disease which affects millions of people worldwide. Chronic hepatitis B (CHB) can lead to significant morbidity and mortality due to complications such as cirrhosis and hepatocellular carcinoma. The pathophysiology of hepatitis is critical to diagnosing CHB. Deciding which patients with CHB should be treated is an important decision as treatment can often lead to better outcomes in the appropriate patient population. The nucleos(t)ide analog inhibitors entecavir and tenofovir are currently the mainstay of treatment as they are able to successfully suppress the virus and lead to fewer complications. Novel therapies are currently being developed which may offer a potential cure for this disease in the future.

关键词： Chronic hepatitis B (CHB) hepatocellular carcinoma (HCC) tenofovir entecavir

Local perceptions of ecosystem services and protection of culturally protected forests in southeast China

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Ecosystem Health and Sustainability 2018年第12期4卷 14-24页

作者： Hong Gao yi Xiao CSA(kris)Van Koppen Zhiyun Ouyang State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina China Aerospace Environmental Development Co.Ltd. BeijingChina Environmental Policy Group Wageningen UniversityWageningenThe Netherlands

Introduction:Culturally protected forests(CPFs),preserved and managed by local people on the basis of traditional practices and beliefs,have social and ecological *** residents’perceptions were investigated in three types of CPFs(community forests,ancestral temple forests,and cemetery forests)in five villages in southeast *** semi-structured interviews(232 questionnaires),residents were asked about their perceptions concerning ecosystem services and protection of ***:The survey results showed that resource utilizationwasnot high inCPFs than inforests without culturally *** ecosystem services provided by CPFs included air quality improvement,water retention,recreation,and aesthetic *** were satisfied with different cultural services provided by CPFs,including aesthetic value of community forests,ecotourism of ancestral temple forests,and cultural heritage of cemetery *** rules and traditional customswere used as themainmeasures to govern forests in daily life;however,the most effective measures,in order of importance,were setting fines or punishment by laws,using informal rules and village regulations,or protection by government *** half of the respondents were willing to pay for maintaining ecosystem services of CPFs,but 77.8%respondents were willing to spend time on *** apolicy perspective,educational programs were as important as traditions,and they are crucial to explain the ecological importance of ***:The conservation of biodiversity and ecosystem services of CPFs will benefit if government agencies consider incorporating CPFs into policy and legislative frameworks,maintain CPFs as collectively owned forests,and introduce ecological compensation mechanisms.

关键词： Conservation culturally protected forests ecosystem services informal rules local community