由MAX038构成感应加热电源逆变触发电路

为了提高感应加热电源逆变器的工作和触发质量,设计了以函数发生器MAX038为核心构成的感应加热电源逆变触发电路,实现了无相差频率跟踪功能。文中对触发脉冲的相位补偿、死区和重叠区的产生以及起动电路进行了分析和设计,给出了实验结果。     

两种新型晶闸管投切电容器补偿装置的主电路及触发方式

依照TSC投切机理，开发了两种工作可靠、使用元件少、成本低的TSC投切开关的新型主回路结构，简称为“2 1”电路和“2 2”电路。满足了TSC投切机理，投入瞬时，电流无冲击，平稳过渡。不仅介绍了“2 1”电路和“2 2”电路工作机理，晶闸管触发原理，投切过渡过程电流、电压情况等，还简单介绍针对上述两种主电路所开发的触发控制电路。     

我国低压电器的现状及发展趋势

根据我国低压电器的发展状况,介绍了其主要产品的性能、特点；通过对比分析,指出了目前我国低压电器产品存在的主要问题；结合科学技术的发展,对我国低压电器及其主要产品的发展趋势作了较为详细地论述．     

Low Temperature Dechlorination of Densified Refuse Derived Fuel in Pyrolysis

Study on behavior of chlorine contained in oval-shaped densified refuse derived fuel (d-RDF) prepared from municipal solid waste in pyrolysis was carried out by means of temperature-programmed electrical furnace, and the gas evolving from pyrolysis was investigated by FFIR. De-HC1 rate was calculated by determining the emission fraction of HC1 in the flue gas and the fraction of C1 left in the pyrolysis residue. The results show that C1 in the d-RDF releases primarily in the form of HC1 during the pyrolysis, and the initial releasing temperature of HC1 enhances with the increase of heating rate. Meanwhile, the higher the end temperature of pyrolysis, the more the C1 released. De-HCl rate is about 70% when the end temperature of pyrolysis is around 600℃. Besides, mechanism of C1 release is discussed.     

Electrochemical impedance spectra of V_2O_5 xerogel films with intercalation of lithium ion

1INTRODUCTION Vanadiumpentoxidexerogel(VXG)filmshavereceivedsignificantattentionduringthelasttwo decadesduetotheirbroadindustrialapplicationsespeciallyinopticalswitchingdevices[1,2],electro chromicdevices[3]andreversiblecathodesforlithi umrechargeablebatteries.ThecommonmethodsofpreparingVXGfilmsareconventionaltech niques,includingpulsedlaserdeposition[4],sput tering[5]andvacuum deposition[6].However,suchmethodsalwaysinvolveconditionsofhightemper atureandvacuum,whichrequirecomplicated…     

Preparation of La_(0.9)K_ (0.1)CoO_3 Perovskite Composite Oxide

1Introduction Perovskitecompositeoxideisanewkindoffunction almaterial,whichhasstablecrystalstructure,favorable thermalstability,soundelectronicproperty,anditis widelyusedascatalyst,optics,etc.Theresearchabout itsapplicationinautomobilewastegascleaninghasb…     

工业废弃物的多途径应用及效果分析

在钢铁冶金生产过程中会产生大量工业废弃物，而且其存在形态各不相同，既污染环境，又造成资源浪费。阐述了如何根据各种废弃物不同的形态，采取相应的方式方法加以回收利用；进一步介绍了几年来济钢烧结厂在这方面所做的工作及取得的成效。     

Sustainable Disposal of Domestic Sanitary Waste

The study presented is an example of the assessment of the relative sustainability of either option for disposal of domestic sanitary waste, either via the toilet or via the solid waste route. This required an evaluation of the total (social, economic, environmental, and technical) benefit/cost of implementing and adopting the alternative routes and an assessment of public responsiveness to encouragement to change sanitary waste disposal practices. It illustrates how, even for an apparently straightforward either/or question, the assessment of relative sustainability is complex and the amount of data needed to quantify sustainability indicators is prodigious. The study also provides an appraisal of the effectiveness of public campaigns to reduce waterborne disposal. Important information regarding public attitude and behavior in relation to wastewater systems has been acquired and lessons for ways of encouraging behavioral change to more sustainable ways of living have been gleaned.     

冷轧废水处理站工艺介绍

介绍包钢薄板坯连铸连轧厂冷轧废水处理的工艺程序和特点。     

Instrumental Learning Within the Rat Spinal Cord: Localization of the Essential Neural Circuit.

Following spinal transection of the upper thoracic spinal cord, male Sprague-Dawley rats given legshock whenever a hindlimb is extended learn to maintain the leg in a flexed position. The region of the cord that mediates this instrumental learning was isolated using neuroanatomical tracing, localized infusion of lidocaine, and surgical transections. DiI and Fluoro-Gold microinjection at the site of shock application labeled motor neuron bodies of lamina IX in the lower lumbar region. Local application of the Na++ channel blocker lidocaine disrupted learning when it was applied over a region extending from the lower lumbar (L3) to upper sacral (S2) cord. The drug had no effect rostral or caudal to this region. Surgical transections as low as L4 had no effect on learning. Learning also survived a dual transection at L4 and S3, but not L4 and S2. The results suggest that the essential neural circuit lies between L4 and S3. (PsycINFO Database Record (c) 2010 APA, all rights reserved)