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Multilayer microhydraulic actuators with speed and force configurations

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Microsystems & Nanoengineering 2021年第2期7卷 97-106页

作者： Jakub Kedzierski Hero chea Massachusetts Institute of Technology Lincoln Laboratory LexingtonMA02420USA

Electrostatic motors have traditionally required high voltage and provided low torque, leaving them with a vanishingly small portion of the motor application space. The lack of robust electrostatic motors is of particular concern in microsystems because inductive motors do not scale well to small dimensions. Often, microsystem designers have to choose from a host of imperfect actuation solutions, leading to high voltage requirements or low efficiency and thus straining the power budget of the entire system. In this work, we describe a scalable three-dimensional actuator technology that is based on the stacking of thin microhydraulic layers. This technology offers an actuation solution at 50 volts, with high force, high efficiency, fine stepping precision, layering, low abrasion, and resistance to pull-in instability. Actuator layers can also be stacked in different configurations trading off speed for force, and the actuator improves quadratically in power density when its internal dimensions are scaled-down.

关键词： configuration trading inductive

Classification of Fundus Images Based on Deep Learning for Detecting Eye Diseases

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Computers, Materials & Continua 2021年第4期67卷 411-426页

作者： Nakhim chea Yunyoung Nam Department of ICT Convergence Rehabilitation Engineering Soonchunhyang UniversityAsan31538Korea Department of Computer Science and Engineering Soonchunhyang UniversityAsan31538Korea

Various techniques to diagnose eye diseases such as diabetic retinopathy(DR),glaucoma(GLC),and age-related macular degeneration(AMD),are possible through deep learning algorithms.A few recent studies have examined a couple of major diseases and compared them with data from healthy ***,multiple major eye diseases,such as DR,GLC,and AMD,could not be detected simultaneously by computer-aided systems to *** were just high-performance-outcome researches on a pair of healthy and eye-diseased group,besides of four categories of fundus image *** have a better knowledge of multi-categorical classification of fundus photographs,we used optimal residual deep neural networks and effective image preprocessing techniques,such as shrinking the region of interest,iso-luminance plane contrast-limited adaptive histogram equalization,and data *** these to the classification of three eye diseases from currently available public datasets,we achieved peak and average accuracies of 91.16%and 85.79%,*** specificities for images from the eyes of healthy,GLC,AMD,and DR patients were 90.06%,99.63%,99.82%,and 91.90%,*** better specificity performances may alert patient in an early stage of eye diseases to prevent vision *** study presents a possible occurrence of a multi-categorical deep neural network technique that can be deemed as a successful pilot study of classification for the three most-common eye diseases and can be used for future assistive devices in computer-aided clinical applications.

关键词： Multi-categorical classification deep neural networks glaucoma age-related macular degeneration diabetic retinopathy

An integrated review of automation and robotic technologies for structural prefabrication and construction

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Transportation Safety and Environment 2020年第2期2卷 81-96页

作者： cheav Por chea Yu Bai Xuebei Pan Mehrdad Arashpour Yunpeng Xie Department of Civil Engineering Monash UniversityClaytonVIC 3800Australia Department of Civil Engineering Hefei University of TechnologyHefei230009China Department of Civil Engineering Hunan University of Science and TechnologyXiangtanHunan411201China

Building construction has developed from the use of primitive tools to that of machinery,with a tendency toward *** of processes and robotics can improve efficiency,accuracy and safety in *** the other hand,structural prefabrication for construction is increasingly being adopted worldwide to enhance productivity and to alleviate the environmental impact of conventional construction *** combination and application of automation and prefabrication technologies may therefore introduce new developments to the construction *** paper provides a comprehensive review of the use of automation technology for structural prefabrication and construction,including recent developments,challenges and future *** stages following the sequence of construction are proposed:design,construction management,robotic manufacturing,autonomous transportation and automatic structural *** paper concludes that the widespread use of automation technology is preferable to structural prefabrication for construction,and that the design for robotic construction introduced through connection innovations may be beneficial as a means of avoiding complex operations and thus improving the efficiency of robotic assembly processes.

关键词： prefabrication autonomous transport system robotic construction construction automation building information modelling(BIM)

Survey of Rice Cropping Systems in Kampong Chhnang Province,Cambodia

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Rice science 2013年第2期20卷 154-164页

作者： Volker KLEINHENZ Sophon chea Ngin HUN Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH #17Street 306P.O.Box 81Phnom PenhCambodia Provincial Department of Agriculture (PDA) Kampong Chhnang Sangkat KsamKampong ChhnangCambodia Present address:The Herbals Joint Stock Company 8 th FloorBAC A BuildingNo.9Dao Duy Anh StreetDong Da DistrictHanoiVietnam

Although Cambodia might have achieved self-sufficiency and an exported surplus in rice production,its rice-based farming systems are widely associated with low productivity,low farmer income and rural *** study is based on a questionnaire village survey in 14 communes containing 97 villages of Kampong Chhnang Province from March to June,*** analyzes the prevailing rice-based cropping systems and evaluates options for their *** in cropping systems depend on the distance from the Tonle Sap water *** distances greater than 10 km,transplanted wet-season rice cropping system with low productivity of about 1.6 t/hm 2 *** deficiency can be primarily attributed to soils with high coarse sand fractions and low pH （〈 4.0）,use of ＇late＇ cultivars,and exclusive use of self-propagated *** improve this cropping system,commercial ＇medium＇ cultivars help prevent crop failure by shortening the cultivation period by one month and complementation of wet-season rice with non-rice crops should be *** adjacent （≤ 1 km） to the water bodies become inundated for up to seven months between July until January of each *** this area,soils contain more fine sand,silt and clay,and their pH is higher （〉 4.0）.Farmers predominantly cultivate dry-season recession rice between January and ***-nine percent of the area is sown directly and harvested by *** ratio of commercial rice seeds is 59% and yields average 3.2 t/hm *** of the second dry-season rice between April and July may double annual yields in this rice cropping *** upgrading other cultivation technologies,using seeds from commercial sources will improve yield and rice *** with rice,farmers grow non-rice crops at different intensities ranging from single annual crops to intensive sequences at low yields.

关键词： rice cropping system socioeconomic indicator on-farm activity rice production

Insight on China’s Governing Philosophy A Cambodian translator on Xi Jinping: The Governance of China

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China Report ASEAN 2020年第9期5卷 54-55页

作者： chea Munyrith the Project Department of the Cambodian Civil Society Alliance Forum

Xi Jinping:The Governance of China is a threevolume collection of speeches and writings by Chinese President Xi Jinping,who is also General Secretary of the Central Committee of the Communist Party of China(CPC).As a translator for the Cambodian version of the collection,I think the series provides a straightforward approach to understanding the CPC’s governing philosophy as well as China’s dedication to acting as a responsible major country.

关键词： translator Governance straight

规划环评与区域环评的比较研究——以镇江新区姚桥镇工业集中区为例

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生态与农村环境学报 2013年第3期29卷 370-374页

作者：杨文陈雁田炯南京师范大学地理科学学院江苏南京210046 环境保护部南京环境科学研究所江苏南京210018

针对工业集中区的属性,比较了规划环评与区域环评的共同点与差异性。以镇江新区姚桥镇工业集中区规划环评为例,提出了工业集中区规划环评的技术方法,即以《规划环境影响评价技术导则》为主导,参考《开发区区域环境影响评价技术导则》,... 详细信息

针对工业集中区的属性,比较了规划环评与区域环评的共同点与差异性。以镇江新区姚桥镇工业集中区规划环评为例,提出了工业集中区规划环评的技术方法,即以《规划环境影响评价技术导则》为主导,参考《开发区区域环境影响评价技术导则》,在污染源强和环境影响预测方面进行定量评估,在清洁生产及环境准入门槛设置方面加以约束,在环境保护基础设施建设方面予以刚性要求。该文提出的工业集中区规划环评的技术方法可为同类区域规划环评提供借鉴。

关键词：区域环评规划环评比较研究

China’s Experience of Reform and Opening up and Poverty Alleviation Is Great Treasure for the World:On Studying and Reading Xi Jinping the Governance of China

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International Understanding 2020年第3期 69-72页

作者： chea Munyrith Ma Jiatai 无不详 Association for Sino-Cambodian Relations Development Cambodia

Xi Jinping the Govermance of China is a great book elaborating the govermance of China and the precious wealth of *** my opinion,the only purpose of China in sharing this book with the rest of the world is to promote the development of the whole world and build a community of shared future for mankind with the rest of the *** this book,I can feel the greatness,wisdom and demeanor of China as a great power.

关键词： China. ping Jin

Albumin fusion with granulocyte-macrophage colony-stimulating factor acts as an immunotherapy against chronic tuberculosis

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Cellular & Molecular Immunology 2021年第10期18卷 2393-2401页

作者： Yu-Min Chuang Liangmei He Michael L.Pinn Ya-chea Tsai Max A.Cheng Emily Farmer Petros C.Karakousis Chien-Fu Hung Department of Pathology Johns Hopkins University School of MedicineBaltimoreMDUSA Department of Medicine Johns Hopkins University School of MedicineBaltimoreMDUSA Section of Infectious Diseases Department of Internal MedicineYale University School of MedicineNew HavenCTUSA

A long duration of treatment and emerging drug resistance pose significant challenges for global tuberculosis(TB)eradication ***,there is an urgent need to develop novel strategies to shorten TB treatment regimens and to treat drug-resistant *** an albumin-fusion strategy,we created a novel albumin-fused granulocyte-macrophage colony-stimulating factor(albGM-CSF)molecule that harnesses albumin’s long half-life and targeting abilities to enhance the biostability of GM-CSF and direct it to the lymph nodes,where the effects of GM-CSF can increase dendritic cell populations crucial for eliciting a potent immune *** this study,we demonstrate that albGM-CSF serves as a novel immunotherapy for chronic Mycobacterium tuberculosis(Mtb)infections by enhancing GM-CSF biostability in ***,albumin is very safe,stable,and has a long half-life,thereby enhancing the biostability of *** the lungs and draining lymph nodes,albGM-CSF is able to increase the numbers of dendritic cells,which are crucial for the activation of naive T cells and for eliciting potent immune *** administration of albGM-CSF alone reduced the mean lung bacillary burden in mice with chronic tuberculosis *** GM-CSF administration was associated with IL-1βrelease from Mtb-infected dendritic cells and macrophages,higher IL-1βlevels were observed in albGM-CSF-treated mice with chronic tuberculosis infection than in mice receiving *** fusion with GM-CSF represents a promising strategy for the control of chronic lung tuberculosis infections and serves as a novel therapeutic vaccination platform for other infectious diseases and malignancies.

关键词： Tuberculosis albumin GM-CSF therapeutic vaccine fusion protein

China in the Eyes of Cambodian People:China’s Reform and Opening up will Extend to the Whole World——Written on the 70th Anniversary of the Founding of the People’s Republic of China

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International Understanding 2019年第3期 52-54页

作者： chea Munyrith Ma Jiatai Department of Program Management of Civil Society Alliance Forum of Cambodia 不详

Leaders of all developing countries are willing to know—how could China,in just 70 years’time,leap from a poverty-stricken,underdeveloped“Sick Man of East Asia”to an“East Asia Giant”with its over one billion people having good supplies of food and *** Chinese officials visited Cambodia,their first impression was that the development of Cambodia now is very like that of China in the 1980s and 1990s and the national conditions of Cambodia is very like that of China before Reform and Opening Up.

关键词： Written on the 70th Anniversary of the Founding of the People’s Republic of China Extend