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Condenser Optimization in steam Power Plant

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Journal of Thermal science 2003年第2期12卷 176-178,192页

作者： sükrüBekdemir Recepztürk ZehraYumurtac Yildiz Technical University Mechanical Engineering DepartmentIstanbulTurkeyYildiz Technical UniversityMechanical Engineering DepartmentIstanbulTurkeyYildiz Technical UniversityMechanical Engineering DepartmentIstanbulTurkey

In this paper the effects of the condenser design parameters(such as turbine inlet *** power and condenser pressure) on heat transfer area,cooling water *** cost and specific energy generation cost are studied for sur... 详细信息

关键词： condensers steam power plants energy cost.

Implications of vessel co-option in sorafenib-resistant hepatocellular carcinoma

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Chinese Journal of Cancer 2016年第12期35卷 641-644页

作者： Elizabeth A.Kuczynski Robert s.Kerbel sunnybrook Research Institute 2075 Bayview AvenueS-WingRoom S217TorontoON M4N 3M5Canada

The reason why tumors generally have a modest or transient response to antiangiogenic therapy is not well understood. This poses a major challenge for sorafenib treatment of advanced hepatocellular carcinoma(HCC) where alternate therapies are lacking. We recently published a paper entitled "Co-option of liver vessels and not sprouting angiogenesis drives acquired sorafenib resistance in hepatocellular carcinoma" in the Journal of the National Cancer Institute, providing a potential explanation for this limited beneit. We found that in mice bearing HCCs that had acquired resistance to sorafenib, tumors had switched from using angiogenesis for growth to co-opting the liver vasculature by becoming more invasive. Accumulating evidence suggests that many human tumor types may use vessel co-option, which has profound implications for the use of anti-angiogenic agents for cancer treatment.

关键词： Vessel co-option Non-angiogenic Resistance sorafenib Hepatocellular carcinoma

Deep Optimal VGG16 Based COVID-19 Diagnosis Model

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Computers, Materials & Continua 2022年第1期70卷 43-58页

作者： M.Buvana K.Muthumayil s.senthil kumar Jamel Nebhen sultan s.Alshamrani Ihsan Ali Department of Computer science and Engineering PSNA College of Engineering and TechnologyDindigul624622India Department of Information Technology PSNA College of Engineering and TechnologyDindigul624622India Department of Electrical and Electronics Engineering New Prince Shri Bhavani College of Engineering and TechnologyChennai600073India Prince sattam Bin Abdulaziz University College of Computer Engineering and SciencesAlkharj11942Saudi Arabia Department of Information Technology College of Computer and Information TechnologyTaif UniversityTaif21944Saudi Arabia Department of Computer system and Technology Faculty of Computer Science and Information TechnologyUniversity of MalayaKuala Lumpur50603Malaysia

Coronavirus(COVID-19)outbreak was first identified in Wuhan,China in December *** was tagged as a pandemic soon by the WHO being a serious public medical *** spite of the fact that the virus can be diagnosed by qRT-PCR,COVID-19 patients who are affected with pneumonia and other severe complications can only be diagnosed with the help of Chest X-Ray(CXR)and Computed Tomography(CT)*** this paper,the researchers propose to detect the presence of COVID-19 through images using Best deep learning model with various *** features like speeded-Up Robust Features(sURF),Features from Accelerated segment Test(FAsT)and scale-Invariant Feature Transform(sIFT)are used in the test images to detect the presence of *** optimal features are extracted from the images utilizing DeVGGCovNet(Deep optimal VGG16)model through optimal learning *** task is accomplished by exceptional mating conduct of Black Widow *** this strategy,cannibalism is *** this phase,fitness outcomes are rejected and are not satisfied by the proposed *** results acquired from real case analysis demonstrate the viability of DeVGGCovNet technique in settling true issues using obscure and testing ***16 model identifies the imagewhich has a place with which it is dependent on the distinctions in *** impact of the distinctions on labels during training stage is studied and predicted for test *** proposed model was compared with existing state-of-the-art models and the results from the proposed model for disarray grid estimates like sen,spec,Accuracy and F1 score were promising.

关键词： COVID 19 multi-feature extraction vgg16 optimal learning rate

Variability of Carbonate Pedofeatures in a Loess-Paleosol sequence and their Use for Paleoreconstructions

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Journal of Mountain science 2009年第2期6卷 155-161页

作者： Kovda.I sycheva s. Lebedeva M. Inozemtzev s. Institute of Geography Staromonetny 29119017 Moscow Russia Institute of soil science Pyjevsky 7 119017 Moscow Russia Dept. of soil science Moscow State University Leninskiye Gory119998 Moscow Russia

Carbonate pedofeatures were studied in details in a loess-paleosol pedocomplex near Kursk, in the central part of the European Plain. The soils studied included a modern Chernozem and five Pleistocene paleosols. Carbonate morphologies and distributions were described in the field. Various morphologies were sampled for further studies including micromorphology in thin sections and submicroscopic studies under a scanning electron microscope. The complex approach of investigation at macro-, micro-, and submicroscopic levels found that most of carbonate pedofeatures are secondary and multiphase. Many of them are related to cryogenic features. The general trend was of decreasing carbonate content in the older paleosols except for increased content in the 1st and 3rd paleosols. Most of carbonate morphologies are similar in the modern soil and paleosols, but pseudomycelium was found only in the modern Chernozem, while soft masses and impregnations are associated with the paleosols. Detailed study on carbonate attributes revealed their specific features in the modern soil and in paleosols. Veins have dissolution features under the modern environment and seem to reprecipitate in form of pseudomycelium. Coatings in paleosols at a depth of the Ist paleosol include specific fine tubes. Powdery soft masses and impregnations in the paleosols are strongly related to cryogenic fissures and paleopermafrost level. Under sEM they consist of tiny crystals, much smaller than in regular soft masses. several types of hard concretions were identified：rounded, irregular and platy. small concretions in the modern Chernozem have similar morphology and similar 14C-age as the rounded concretions of the upper paleosols. They are expected to represent the same generation of concretions. Platy concretions fill the bottom part of the large fissures. The 14C-age of hard concretions varies from 3310±80 yrs. B.P in the Ist paleosol up to 20 400 yrs. B.P. in the 3^rd. As a result we found the reflectio

关键词： Loess-paleosol pedocomplex pedogeniccarbonates macr- and microforms

sTUDY OF TCP PHAsE PRECIPITATING IN GH4199 sUPERALLOY

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Acta Metallurgica sinica(English Letters) 2004年第5期17卷 645-650页

作者： T.Cui Y.s.Zhang s.W.Guo L.Wang H.C.Yang schoolofMaterialsandMetallurgy NortheasternUniversityShenyang110004ChinaManuscriptreceived15July2003 inrevisedform19January2004

The precipitating regulation and mechanism of TCP phase (μ phase and σ phase) are studied, using electron hole number (EHN) theory, phase analysis technology and TEM observation. The results indicate that the EHN in studied alloy is 2.311-2.348 which is higher than that of critical EHN of μ phase precipitate (2.30), so μ phase could precipitate if there is enough thermo-exposition. In contrast, the calculated EHN is less than that of critical EHN of σ phase precipitate (2.52). However the σ phase is also observed by TEM. Enrich of Cr and Mo around γ phase after γ′phase precipitated leads to σ phase precipitated.

关键词： superalloy TCP phase electron hole number

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A REVOLUTION AT HAND

Beijing Review 2016年第27期59卷 18-19页

作者： Bryan michael Galvan

The fourth industrial revolution promises to bring fundamental changes to China and the world ＇Innovation that isn＇t bringing good to the people never succeeds,＂ declared Travis Kalanick, CEO and co-founder of Uber... 详细信息

关键词：首席执行官工业革命创始人

sURFACE MORPHOLOGY OF sELF-AssEMBLED VERTICALLY sTACKED InAs QUANTUM DOTs BY sIZE-CONTROLLED GROWTH

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Acta Metallurgica sinica(English Letters) 2005年第3期18卷 189-193页

作者： s.W.Li K.Koike stateKeyLaboratoryofOptoelectronicMaterialsandTechnologies Zhongshan（SunYat-sen）UniversityGuangzhou510275China NewMaterialsResearchCenter OsakaInstituteofTechnologyAsahi-kuOhmiyaOsaka535-8585Japan

structural and optical properties of vertically aligned InAs quantum dots (QDs) were embedded in Al0.5Ga0.5As spacer layers. The aligned QDs were grown at 520℃ in the stranski-Krastanow (s-K) growth mode of molecular beam epitaxy. To impro ve QD characteristics, we employed a size- and density-controlled growth procedu re in the upper layers. Measurements by reflection high-energy electron diffract ion (RHEED) and atomic force microscopy (AFM) showed that both the size and dens ity of the QDs. The temperature dependence of the wavelength-integrated photolum inescence (PL) intensity revealed the InAs QD emission.

关键词： quantum dot molecular beam epitaxy atomic force microscopy photoluminescence

Trilobite Biostratigraphy of the lower Paleozoic(Cambrian–Ordovician)Joseon supergroup,Taebaeksan Basin,Korea

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Acta Geologica sinica(English Edition) 2016年第6期90卷 1976-1999页

作者： CHOI Duck K LEE Jeong Gu LEE seung-Bae PARK,Tae-Yoon s. HONG Paul s. Research Institute of Basic sciences Seoul National UniversitySeoul 151-747Korea Ministry of science ICTand Future PlanningGwacheon 427-700Korea Korea Institute of Geoscience and Mineral Resources Daejeon 305-350Korea Korea Polar Research Institute Incheon 406-840Korea

In Korea, trilobites are among the most intensively studied fossil groups in the past century and provide invaluable information about lower Paleozoic stratigraphy, paleogeography, and tectonics of the Korean Peninsula. Trilobites occur in the lower Paleozoic Joseon supergroup of the Taebaeksan Basin which was part of the sino-Korean Craton in the Paleozoic. The Joseon supergroup is divided into the Taebaek, Yeongwol, and Mungyeong groups. The Taebaek and Yeongwol groups are richly fossiliferous, while the Mungyeong Group is poorly fossiliferous. Contrasting trilobite faunal contents of the Taebaek and Yeongwol groups resulted in two separate biostratigraphic schemes for the Cambrian–Ordovician of the Taebaeksan Basin. A total of 22 biozones or fossiliferous horizons were recognized in the Taebaek Group; 19 zones were established in the Yeongwol Group; and four biozones were known from the Mungyeong Group. These trilobite biozones of the Taebaeksan Basin indicate the Joseon supergroup ranges in age from the Cambrian series 2 to Middle Ordovician and can be correlated well with the formations of North China, south China, and Australia.

关键词： Trilobites biostratigraphy Cambrian–Ordovician Taebaeksan Basin

A Review on Cooperative Robotic Arms with Mobile or Drones Bases

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International Journal of Automation and computing 2021年第4期18卷 536-555页

作者： Larona Pitso Ramalepa Rodrigo s.Jamisola Jr. Botswana International University of science and Technology Palapye 10071Botswana

This review paper focuses on cooperative robotic arms with mobile or drone bases performing cooperative tasks. This is because cooperative robots are often used as risk-reduction tools to human life. For example, they are used to explore dangerous places such as minefields and disarm explosives. Drones can be used to perform tasks such as aerial photography, military and defense missions,agricultural surveys, etc. The bases of the cooperative robotic arms can be stationary, mobile(ground), or drones. Cooperative manipulators allow faster performance of assigned tasks because of the available "extra hand". Furthermore, a mobile base increases the reachable ground workspace of cooperative manipulators while a drone base drastically increases this workspace to include the aerial *** papers in this review are chosen to extensively cover a wide variety of cooperative manipulation tasks and industries that use *** cooperative manipulation, avoiding self-collision is one of the most important tasks to be performed. In addition, path planning and formation control can be challenging because of the increased number of components to be coordinated.

关键词： Cooperative arms mobile manipulator aerial manipulator mobile base drone base cooperative tasks