中国设备管理协会抗击新型肺炎疫情倡议书

正当前,新型冠状病毒感染的肺炎疫情防控工作正处于关键时期。习近平总书记高度重视疫情防控特别是患者治疗工作,多次召开会议、听取汇报、发表重要讲话、作出重要指示,要求始终把人民群众生命安全和身体健康放在第一位,强调疫情防控是当前最重要的工作,坚决打赢疫情防控阻击战。协会各会员单位、分支机构、设备工程技术中心,以及全国设备管理工作者,要坚决     

农机新技术为疫情防治保驾护航

正新型冠状病毒感染的肺炎疫情发生以来,为应对疫情保供给,临汾市农机推广部门在做好疫情防控工作的基础上,保障蔬菜生产农机具供应,做好机械化作业技术指导,加强蔬菜生产管理,保障疫情期间蔬菜生产稳定和市场供应。一是强化防疫措施落实,做好精准服务。通过微信、电话等方式向员工、机户、蔬菜种植户宣传科学防控知识,引导教育大家高度     

新冠防控背景下工科类高职体育教育模式

我国的新冠肺炎疫情正处于加强防控的关键时期,工科类高职院校在加强校级突发公共卫生事件应急管理的同时,要积极在教育教学工作中提供策略推动疫情防控取得新突破。体育课程教学可有效增强学生抵抗和免疫疫情的身体素质,基于新冠肺炎疫情防控背景,对工科类高职院校体育教育模式进行分析,找出其疫情防控教学管理存在的问题,提出若干相应策略和建议,并予以实贱。     

战疫情保春耕!山西推出春耕备耕"农机线上服务"!

战疫情、保春耕,农机在行动!当前正值疫情防控的关键期,也是春季农业生产的关键期。山西省农机发展中心按照山西省委书记楼阳生"疫情防控、春耕生产两不误"的指示精神,在门户网站及时上线了"春耕备耕农机线上服务进行时"专栏,指导全省各地农机部门、农机专业合作社及农机从业人员早安排、早行动开展春耕备耕农机化生产,确保全省"三农"工作开好局、起好步。     

新型冠状病毒疫情期间春季苹果园管理技术要点

为最大限度降低新型冠状病毒疫情对果园生产的影响,结合疫情防控和物候期管理特提出苹果园春季管理技术要点,供广大果农朋友参考。     

中国一重: 一手抓疫情防控,一手抓生产运营

新型冠状病毒感染肺炎疫情以来,作为我国重型装备制造业的龙头企业,中国一重坚决贯彻落实习近平总书记关于疫情防控重要指示和重要讲话精神,贯彻落实李克强总理批示要求以及黑龙江省委、省政府对疫情防控的各项具体部署安排,把疫情防控作为当前最重要最紧迫的政治任务。中国一重在高度重视企业自身疫情防控的基础上,坚持“两手抓、两手都要硬”,一手抓疫情防控,一手抓生产运营。     

众志成城 我们一起战疫

新型冠状病毒感染的肺炎疫情发生以来,全国各地按照习近平总书记和党中央国务院的决策部署,众志成城、团结奋战,打响了一场防控疫情的人民战争。全国上下齐动员,全面部署,形成全面防控疫情工作的局面。《液压气动与密封》杂志社按照国家新闻出版署的要求,按照主办单位中国液压气动密封件工业协会对疫情防控工作的统一部署,快速响应、主动作为,自2020年1月29日,通过杂志微信公众平台,连续发布了《凝心聚力,并肩作战,共同打赢新型肺炎疫情防控狙击战》、《共同抗击新型肺炎疫情的倡议书》、《民政部社管局关于全国性行业协会商会进一步做好新型冠状病毒肺炎防控工作的指导意见》、《中国-东盟工商界合作防控新冠肺炎疫情的倡议》、《习近平:在统筹推进新冠肺炎疫情防控和经济社会发展工作部署会议上的讲话》、《2019年机械工业运行情况综述》等,向行业传达上级抗疫精神、相关政策措施和工业运行分析。     

棚室蔬菜病虫害生态防控措施

针对棚室蔬菜病虫害生态防控措施进行充分探讨,阐述了棚室蔬菜病虫害生态防控的具体内容,特别围绕着蔬菜灰霉病和蔬菜枯萎病等展开充分论述,如温度调节、光照控制、水分控制、土壤消毒等,且充分详述了棚室蔬菜虫害实际防控措施。通过近几年在本地推广应用,大棚蔬菜种植户取得了很好的经济效益、同时带来了客观的社会效益。     

新冠肺炎疫情对长子县蔬菜稳产保供的影响

新冠肺炎疫情发生以来,政府出台了交通管制等一系列措施,对疫情进行严防严控、联防联控、群防群控,取得了阶段性成效。但这些管制措施对长子县蔬菜生产造成了影响,出现了短期不平衡现象。文章通过蔬菜稳产保供工作中对蔬菜产销情况的日常监测,分析了疫情对当地蔬菜产业的影响,对采取的应对措施进行了总结,对今后蔬菜产销恢复提出了建议意见。     

山西蔬菜病虫绿色防控技术应用探讨

论述了近年来山西省在蔬菜病虫绿色防控技术应用方面的有益尝试和探索,介绍了蔬菜病虫防控中应用最广的核心技术。针对主要靶标病虫集成技术模式,以及不同蔬菜作物全程绿色防控技术集成,并结合生产实际,分析了病虫绿色防控技术的应用效益。     

欠驱动平面五杆机构混沌运动的控制与反控制

对于欠驱动连杆机构,混沌的控制和反控制研究是避免或利用其混沌运动的关键问题。在欠驱动平面五杆机构中加装一个线性弹簧,改变了机构的受力状况,从而实现了对机构混沌运动的控制与反控制。以弹簧安装位置为参数的分叉图显示,不同的弹簧安装位置可以使机构呈现出混沌运动、周期运动等多种运动形式,弹簧的安装位置可以通过螺旋机构进行调节,这样就形成了一种简单、有效的机构混沌运动控制和反控制的方法。机构运动的相图和最大Lyapunov指数验证了方法的有效性。     

Quality and anti-adulteration control of vegetable oils through microwave dielectric spectroscopy

Quality control of vegetable oils is becoming more stringent, and strict laws are being enforced, especially for avoiding adulteration. The public bodies that are responsible for the prevention of the adulteration of foodstuffs necessitate methods of analysis that could facilitate large-scale in situ controls. Similarly, oil producers constantly strive to speed up internal quality control. As a direct consequence, there is an increasing demand for innovative methods of analysis that could guarantee real-time in situ monitoring and provide adequate accuracy. On such bases, the present work addresses the possibility of monitoring qualitative characteristics of vegetable oils through microwave dielectric spectroscopy. To this purpose, the Cole–Cole dielectric parameters of different vegetable oils are evaluated through an innovative automatable procedure that suitably combines traditional TDR measurements, SOL calibration, frequency domain processing, TL modelling and, finally, a minimization routine. The proposed procedure is carried out first on different “pure” oils and, secondly, on some oil mixtures. The obtained results confirm that different dielectric characteristics are associated with different oils, thus confirming the considerable potential of dielectric spectroscopy for quality and anti-adulteration control purposes, especially in view of practical applications.     

山西省信息产业发展现状与对策研究

山西正处在转型跨越的关键时期,加快培育发展信息产业,充分发挥其对其它支柱产业发展的转换升级与倍增作用,是实现山西省跨越发展目标的重要途径。通过对山西信息产业发展现状与面临的问题进行认真、深入地研究,提出切合实际的加快山西信息产业发展的对策建议。     

基于山西吹制玻璃器皿产业引入绿色设计理念

发展循环经济已经成为目前我国经济发展的趋势。作为山西主要出口外贸增长点的吹制玻璃器皿行业来说,是一个传统的高污染、高能耗行业。引入绿色设计的理念,无论在初期的设计工艺还是后续的生产决策中,都为山西吹制玻璃器皿行业的发展带来了长远的利益。     

Operational damage to the structure and failure of the KAMAZ truck spring in the temperature–load conditions of the North

Forecasting of the residual life of machine and structure elements requires consideration of the changes of the metal condition until it achieves its critical states. The failure of the KAMAZ truck spring during the cold operation period under the climatic and natural conditions of the North was studied taking the metal degradation in the zones of different loading into account. The structural damage was estimated using the microhardness and porosity parameters. The physical mechanisms that change the microhardness and the formation of the pore system in the spring steel were analyzed. It is shown that a deviation of the value of the metal microhardness from the normal distribution law is observed in the zone of development of a fatigue crack in the spring. Satisfactory resistance of the spring material to the development of a failure is revealed under the considered temperature–load conditions. A materials-engineering analysis confirmed the role of the road conditions as a more significant destructive factor during the working of the spring in the permafrost zone compared to the factor of the low temperatures.     

防止液化石油气铁路罐车内置全启式安全阀弹簧断裂的方法

分析了液化石油气铁路罐车内置全启式安全阀弹簧断裂的原因，介绍了防止弹簧断裂的方法。     

Study on dynamic friction characteristics in reciprocating friction drive system

The dynamic friction characteristics of a reciprocating friction drive system are investigated under conditions of dry contact using 0·45% carbon steel pair. Three friction modes are found during the operation, i.e. stick-slip, sticking and a transition region. The critical operating conditions in classifying these three modes are examined under various driver speeds, normal loads and spring constants. The critical values of driver speed and normal load increase with increasing spring constant. Generally, in the friction drive system the disappearance of the stick-slip results in smooth rolling. It is also found that the slope at the first period of slip on the traction force–relative slip velocity curve would have a transition from negative to positive value when the friction mode of stick-slip changes into sticking. Moreover, results show that the sticking mode gives the best positioning accuracy with the least wear on the contact surfaces. In addition, a transition from severe wear to mild wear is found when the friction mode is transferred from stick-slip to sticking only.     

Tribological degradation of two vegetable‐based lubricants at elevated temperatures

Renewable‐based lubricants are being considered as potential alternatives to petroleum‐based lubricants for various reasons, mainly increased environmental sensitivity. However, understanding the tribological performance of such vegetable‐based lubricants under elevated temperatures is critical for their industrial implementation. This study focuses on the friction and abrasion rate characteristics of soybean and sunflower base oils in comparison to a base mineral oil under sliding wear at elevated temperatures. It was found that the abrasion rate and friction were less severe for the vegetable‐based lubricants up to temperatures around 100°C. The observed performance of the vegetable‐based lubricants was verified using a kinetic reaction mechanism model of lubricant degradation. Copyright © 2007 John Wiley & Sons, Ltd.     

Evaluation of thermal deformation model for BGA packages using moiré interferometry

A compact model approach of a network of spring elements for elastic loading is presented for the thermal deformation analysis of BGA package assembly. High-sensitivity moiré interferometry is applied to evaluate and calibrated the model quantitatively. Two ball grid array (BGA) package assemblies are employed for moiré experiments. For a package assembly with a small global bending, the spring model can predict the boundary conditions of the critical solder ball excellently well. For a package assembly with a large global bending, however, the relative displacements determined by spring model agree well with that by experiment after accounting for the rigid-body rotation. The shear strain results of the FEM with the input from the calibrated compact spring model agree reasonably well with the experimental data. The results imply that the combined approach of the compact spring model and the local FE analysis is an effective way to predict strains and stresses and to determine solder damage of the critical solder ball.