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台达运动控制型plc应用技术

国内外机电一体化技术 2008年第5期11卷 11-14页

作者：赵越锦中达电通股份有限公司plc产品处

本文简述台达DVP20PM运动控制型plc的硬件及软件结构,并介绍在应用中的方法及特点。

关键词： plc运动控制逻辑控制数控系统 CAM 插补运算

An Alterable Clamping Force Fixture Controlled by High Speed on-off Valve

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An Alterable Clamping Force Fixture Controlled by High Speed...

第三届国际机械工程与力学会议

作者： Guangming YUAN Houfang SUN Guangming CHEN Shandong University of Technology Beijing Institute of Technology Army aviation institute of plc

We put forward a project on alterable clamping force fixture direct at a constant clamping force fixture has an effect on part machining accuracy. According to the cutting force, the fixture optimization analysis the best clamping points and the clamping force of each point. The fixture can automatically adjust clamping force to suit with the cutting force so as to reduce the cutting deformation of machining system. We adopt the same process step numerical control technique to carry out self-adapting clamping function and adopt high speed on-off valve serve as kinetic control element of hydraulic pressure system to control the clamping force.

关键词： Self-adapting fixture High Speed on-off Valve Kinetic control

来源： cnki会议评论

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台达运动控制型plc应用技术

伺服控制 2008年第6期 76-79,50页

作者：赵越锦中达电通股份有限公司plc产品处

本文简述台达DVP20PM运动控制型plc的硬件及软件结构,并介绍在应用中的方法及特点。

关键词： plc 运动控制数控系统插补运算

The Effect of Organo-Mineral Fertilizer Applications on the Yield of Winter Wheat, Spring Barley, Forage Maize and Grass Cut for Silage

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Journal of Environmental Protection 2015年第2期6卷 103-109页

作者： Grace H. Smith Keith Chaney Charles Murray Minh Son Le Harper Adams University Newport UK United Utilities Group plc Lingley Mere Business Park Warrington UK

Biosolids were applied with urea to produce a granulated organo-mineral fertiliser (OMF) for application by farm fertiliser equipment to a range of agricultural crops. The recommended rates of nitrogen, phosphate and potash were calculated for the test crops using “The Fertiliser Manual”, which assesses the nutrient requirement based on previous cropping, rainfall and soil index. The OMF produced similar crop yields compared to ammonium nitrate fertiliser when applied as a top-dressing to winter wheat, forage maize and grass cut for silage in the cropping years 2010 to 2014. In 2012 the grain yield of spring barley top-dressed with OMF was significantly lower than the conventional fertiliser treatment, due to dry conditions following application. For this reason it is recommended that OMF is incorporated into the seedbed for spring sown crops and The Safe Sludge Matrix guidelines followed. The experimental work presented shows that OMF can be used in sustainable crop production systems as a source of nitrogen and phosphorus for a range of agricultural crops.

关键词： Biosolids Organo-Mineral Fertiliser Crop Yield Winter Wheat Spring Barley Forage Maize Grass Silage

Broadband omnidirectional visible spectral metamaterials

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Photonics Research 2023年第7期11卷 1284-1293页

作者： JING ZHAO XIANFENG WU DI CAO MINGCHAO ZHOU ZHIJIE SHEN XIAOPENG ZHAO Medtronic plc BoulderColorado 80301USA Smart Materials Laboratory Department of Applied PhysicsNorthwestern Polytechnical UniversityXi’an 710129China

Optical metamaterials offer the possibility of controlling the behavior of photons similarly to what has been done about electrons in ***,most optical metamaterials are narrowband,and they achieve negative refraction within a small window of incident angles,making them impractical for common visible light systems that operate effectively over a wide range of frequencies and *** resistive loss at the resonant frequency of these metamaterials further prevents them from being deployed in the real ***,we develop a novel metamaterial randomly assembled by a list of narrowband,omnidirectional,and ultralow-loss meta-cluster systems using a bottom-up *** interactions among numerous meta-cluster sets greatly broaden the effective bandwidth of the overall structure,exhibiting frequency selectivity and spatial modulation when responding to white-light *** observe negative refraction in the 490–730 nm band,and observe an inverse Doppler effect at green,yellow,and red frequencies,across most of the visible *** method allows for low-cost fabrication of sizable broadband omnidirectional three-dimensional metamaterial samples,which opens the door to the rapid development of optical metamaterials,micro–nano assembly and preparation,tunable optical device engineering,etc.

关键词： visible directional refraction

The earliest acupuncture school of the United States incubated in a Tai Chi Center in Los Angeles

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Journal of Integrative Medicine 2014年第6期12卷 524-528页

作者： Arthur Yin Fan Mc Lean Center for Complementary and Alternative Medicine PLC. Vienna VA 22182 USA

Traditional Chinese medicine（TCM）arrived in the United States（U.S.）in ***,most TCM providers were herbalists,w ith very few being *** on my research,the earliest acupuncturist to practice inthe U.S. was Dr. Fu Xing Fang , who immigrated to the U.S. in the early 1930s and practiced acupuncture in the Los Angeles （LA） area. He was among the first of a few students of the well-known Dr.

关键词： acupuncture United States California history of medicine Gim Shek Ju school education

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双极晶体管的进步

电子产品世界 2004年第12B期11卷 91-92页

作者： Peter Blair Zetex Semiconductors plc

尽管MOSFET已经成为众多电源管理设计者默认的选择,但是双极晶体管也一直是媒体关注的焦点,并且在某些电源开关应用中是更好的选择.近几年来,双极晶体管发展很快,并经历了几代技术上的进步.如图1所示.本文首先综述当前双极晶体管的特性... 详细信息

尽管MOSFET已经成为众多电源管理设计者默认的选择,但是双极晶体管也一直是媒体关注的焦点,并且在某些电源开关应用中是更好的选择.近几年来,双极晶体管发展很快,并经历了几代技术上的进步.如图1所示.本文首先综述当前双极晶体管的特性,然后说明它们不可或缺的优越性如何在实际中得到应用.

关键词：双极晶体管 MOSFET 电源管理电源开关焦点发展技术设计者选择媒体

HOLLiAS-plc在城市污水处理中的应用

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国内外机电一体化技术 2004年第4期7卷 43-43,46页

作者：张开尔杭州和利时自动化有限公司plc事业部

忻州污水处理项目是一项属于五湖治理的重点工程，该污水处理厂的日处理污水能力为6．5万吨。为了实现“现场无人值守，总站少人值班”的目的，忻州污水处理厂选用和利时公司的HOLLiAS-plc系统在该污水处理厂建立一个先进、可靠、高效... 详细信息

忻州污水处理项目是一项属于五湖治理的重点工程，该污水处理厂的日处理污水能力为6．5万吨。为了实现“现场无人值守，总站少人值班”的目的，忻州污水处理厂选用和利时公司的HOLLiAS-plc系统在该污水处理厂建立一个先进、可靠、高效且便于进一步扩充的集过程控制、监视和计算机管理于一体并且具备良好开放性的监控系统，完成对整个污水处理工艺过程及全部生产设备的监测与自动控制。

关键词：忻州重点工程和利时公司污水处理项目计算机管理治理过程控制污水处理厂城市污水处理污水处理工艺

HOLLiAS-LEC G3小型一体化plc在聚氨酯双色浇注机中的应用

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可编程控制器与工厂自动化（plc FA） 2007年第11期 112-115页

作者：于进杭州和利时自动化有限公司plc事业部

本文介绍提高双色浇注机的工作稳定性和计量准确性的HOLLiAS-LEC G3小型一体化可编程控制器(plc)应用技术。

关键词：聚氨酯浇注机 plc 聚氨酯