无定向导线的平差和坐标计算的应用

就无定向导线在甘肃武都地区实际应用中的测量公式推导及精度分析进行探讨。     

斜坡道弯道腰线经伟仪放样法

介绍经纬仪伪倾角法在斜坡道弯道腰线放样中的原理、公式的推导过程,还介绍了该方法在矿业公司主斜坡道施工中的应用。     

试论以长度为权求量值的窍门

介绍了以长度为权求量值的窍门,除了引进常用的加权平均公式外,重点提出一新公式,加以推导论证,论述其特点以及在矿产地质和采矿中的应用,阐明错用公式产生的严重恶果,选准用好公式所带来的经济效益和社会效益。     

Ti在铁素体中的平衡固溶度

基于Thermo-Calc和相关文献测试数据所推导出的Fe2Ti在铁素体中的平衡固溶度公式,并结合Fe2Ti的形成自由能,推导出了钛在铁素体中的平衡固溶度公式。这对于钛的碳化物、氮化物及碳氮化物等第二相颗粒在铁基体中的固溶度积求算以及相关的固溶析出行为等方面的研究具有重要的作用。     

曲线拟合的最小二乘法在数据采集中的应用

介绍曲线拟合的最小二乘法的原理及公式推导,根据对数据采集系统的分析,提出此方法在数据采集中的应用.以Delphi编程为例给出最小二乘法直线拟合的实现代码.     

复吹转炉工艺参数与转炉振动相关性实验研究

考虑实际生产中各种因素对激振力的影响，最后建立了可以应用到实际生产中的完整的激振力公式。本文还进行了实验转炉的振动测试，验证了所推导的激振力公式的正确性。     

伪斜井在黄金矿山开拓中的应用

本文介绍在黄金矿山设计中，利用伪斜井开拓推导公式，准确、迅速计算出伪斜井设计方位。也介绍了利用推导公式对倾斜矿体、急倾斜矿体开拓设计的应用实例。     

软件温压补偿实用公式及配置方法

为解决部分控制系统软件中需要自编公式进行气体流量温压补偿的问题,结合现场需要,作者对差压变送器开方和线性两种输出方式下,普通气体和蒸汽两种常用介质的软件温压补偿公式分别进行了推导,并举例说明公式在软件中的配置应用方法.为自动化软件开发人员进行气体流量温压补偿提供了实用方案.     

关于首钢高炉风口理论燃烧温度计算经验公式的探讨

通过对高炉风口直接测温及常规法的计算，推导出新的理论燃烧温度经验公式，应用不同公式计算的高炉风口理论燃烧温度与风口红外测定的温度进行对比分析，认为新经验公式更适合首钢高炉应用。     

简便测定天文方位角公式的推证及方法探讨

根据天体定位三角形和球面三角公式、推导出一般天体地平坐标与赤道坐标表示的方位均公式，并利用计算儒略目的方法，推导出一般天体方位角计算公式中的有关参数．从而给出了测线方位角的实用公式．用该公式计算测线方位角简单、方便，有现代计算手段的配合，比常规靠查天文年历求算测线方位角效率要提高几倍到十几倍、生产、经济效益显著．利用该方法在线状工程测量中求定端边方位角具有很大的实用价值和推广、普及使用的意义．最后给出了利用该公式测算方位角的具体操作步骤．为生产单位应用该方法提供了方便条件。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.