任意测站测设道路曲线

提出一种以任意测站进行曲线测设的测设元素计算方法，从而充分利用全站仪的放样功能，方便快捷地测设道路曲线。     

全站仪任意设站测设曲线

文中介绍了一种测设曲线的实用方法，即全站仪任意设站测设曲线。充分利用全站仪的优点，一次设站即可放样曲线中线、内外两边线上的全部需放样点位，且具有测设效率高、测设精度高、测站选择灵活等优点，是一种很好的方法。     

线路坐标系下的中线点位坐标计算通式

摒弃了常规法测设线路中线需建立多个独立坐标系的方法，在对“线元”上任一点曲率计算的基础上，提出了一个统一在线路坐标系下以桩号或弧长为引数的坐标计算通式，使得各种情况下的曲线及其相互组合线形上点的坐标计算变得相当容易，借助于计算机，甚至可编程计算器就可实现计算的自动化。提高了测设的精度，对于线路测设具有较高的推广使用价值。     

高速公路和桥梁缓和曲线段护栏曲线的性质及放样方法

该文在论证了高速公路和桥梁缓和曲线段护栏曲线的性质后，提出了适合护栏特点和条件的弦线支距法放样方法；推出的护栏曲线参数模型，奠定了其测设的基础，并据此讨论了现有测设方法的精度问题，所得结论对护栏曲线的测设具有重要意义。     

高速公路和桥梁缓和曲线段护栏曲线的圾放样方法

该文在论证了高速公路和桥梁缓和曲线段护栏曲线的性质后，提出了适合护栏特点和条件的弦线支距法放样方法；推出的护栏曲线参数模型，奠定了其测设的基础，并据此讨论了现有测设方法的精度问题，所得结论对护栏曲线的测设具有重要意义。     

山区长输气管线的曲线测设

该文介绍了在山区长输气管线测量中 ,管线的折点桩之间大部分不通视且部分点上空有障碍物 ,采用GPS不能施测坐标时 ,结合山区的自然地理条件 ,采用全站仪间接施测折点水平角 ,极坐标法测设曲线以及跨越障碍物测设曲线的内容和方法 ,可在一定精度要求下应用     

大型公路桥梁曲线段三维测设数据实时解算方法及应用

该文结合南京长江二桥复杂的曲线段施工 ,讨论其三维测设数据的计算模型及解算方法 ,编制相应的计算程序 ,为现场测设提供有效的计算方案 ,从而指导桥梁曲线段的施工测设 ,提高施工速度和保证工程质量。     

坐标法测设公路曲线桥

立足于利用光电仪，采用极坐标方法解决曲线桥墩、台的测设与复核，力求得到一套系统的实用计算方法。测设固然为目的，但为保证其准确性，必须采取合理的方法予以复核，方可予以施工。     

任意设站法放样道路边坡点

本介绍在道路施工中。尤其是在高边坡放样时选择全站仪。采用任意设站法。测设道路各边坡控制桩点的方法，具有速度快、精度高、迁站少、实现一站多点之功效，同时利用fx-4500p型编程计算。设置实用程序。充分发挥出全站仪潜在优势。     

在道路边桩坐标计算中可编程计算器的应用

文中利用计算器，根据横断面所测设的数据，直接计算出道路边桩的坐标。此方法较其他方法具有速度快、准确度高、外业工作量小等特点。     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

2014 second batch of rare earth quota released

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Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.