加快广西有色金属工业发展的思考

文章结合我国《有色金属产业调整和振兴规划》和广西有色金属工业的实际，提出了加快广西有色金属工业发展的5条路径。     

Asset price,risk transfer and economic activities: Firm-level evidence from China

The paper investigates the extent of the impact from changes in asset price and risk on corporate investment behaviors as well as the real economy. The results support the unidirectional causality effects from asset price fluctuations on the macro-level. By applying quarterly data of Chinese listed companies, we further find the existence of balance sheet effect on the firm-level, which suggests that the changes in asset prices and risk affect the net asset value, and consequently influence corporate investment decisions. More importantly, the balance sheet effect appears to be much more significant after the implementation of new fair value accounting standards in 2007. The impact on the real economy from asset price risk is found to be more prominent as well.     

哈尔滨市北郊菜地土壤重金属污染研究

以哈尔滨市北郊菜地土壤为研究对象,经过野外调查和室内分析对土壤的理化性质,重金属的含量及空间分异性以及土壤理化性质与土壤重金属之间的相关性进行研究;采用单因子和综合因子指数法对土壤中重金属的污染现状进行评价;结果表明,哈尔滨市北郊菜地土壤重金属污染的主要贡献因子是Cd;哈尔滨市北郊菜地土壤为轻污染;土壤对Cr,Cd和Ni的吸附容量取决于土壤颗粒的组成状况;Cu,Zn,Ni和Cr和土壤理化性质间存在相关性;重金属元素间存在相关性,说明它们的来源可能相同;造成这一结果的原因是受人类活动的影响。     

黄石市基本农田水稻中重金属污染评价分析

对黄石市基本农田稻米中重金属含量进行了分析测定并进行相应的分析评价,以明确该地区稻米中的重金属污染情况。结果表明：基本农田稻米整体上已经受到了Pb污染,大冶市和阳新县的稻米均为重度Pb污染（污染指数分别为5.469和3.689）,未受到其他重金属污染（其他重金属的污染指数均小于1）;分析不同样点的污染情况,62%的样点为重污染水平,18%的样点为中污染水平,16%的样点为轻污染水平,其他为清洁水平;分析污染原因可能主要由废水浇灌以及大气重金属尘沉降等引起。     

挤塑板和苯板在高寒地区应用分析

挤塑板与苯板保温系统相似,挤塑板具有极佳的保温性能、出色的抗压性能、极低的吸水率、良好的隔音稳定性、超长的耐久性能、较好的尺寸稳定性及抗蠕变性能。     

石膏染色法

参考日本的丝绸石膏染色法,通过在含有酰胺键纤维的织物中加入不同类型的金属离子,分析金属离子对织物颜色、色光和色牢度等方面的影响。     

Volatifity spillovers on precious metals markets and the G-7： The effects of the Asian crisis

This paper investigates the nature of volatility spillovers between stock returns and precious metals returns for the G-7 countries over the 1995-2006 period. We divide our sample into a number of sub periods, prior to, during and after the Asian crisis, with the objective to provide a wide analysis of the behaviour of these two markets taking into account the effects of the Asian crisis; We use EGARCH modelling, which takes into account whether bad news has the same impact on volatility as good news. The results show that there is no evidence of volatility persistence from stock returns to precious metals returns, but overall the results are significant in the other way around. In terms of volatility spillovers effects, the main findings are that there is evidence of volatility spill over running in a bidirectional way in almost all the cases. And finally, the results from asymmetric spillovers effects show that negative news has a stronger impact in these financial markets than positive news.     

DOLLARIZATION OF DEBT CONTRACTS: EVIDENCE FROM CHILEAN FIRMS

This paper uses a new data set to estimate the causes and consequences of foreign currency debt in firms' balance sheets. The evidence from this sample of Chilean firms indicates that dollar‐denominated debt increases with firms' size and degree of exposure to foreign competition. We find evidence that dollar‐denominated debt combines with exchange rate movements to produce a negative balance‐sheet effect that reduces firms' investment in periods of strong exchange rate depreciation. This negative balance‐sheet effect is associated with long‐term debt and appears to be nonlinear in the amount of real exchange rate depreciation.     

Risk analysis for operation of aluminum heat exchangers contaminated by mercury

Brazed aluminum plate-fin heat exchangers are extensively used in gas separation processes including LNG, LPG, NGL, nitrogen rejection and olefins manufacture. In situations where mercury is a trace component of feed gas or liquid feeds to crackers, condensation of liquid or precipitation of solid mercury can occur in heat exchanger passes, even with functional mercury removal systems in place. Mercury in liquid phase causes, under certain well-defined conditions, liquid metal embrittlement of susceptible metallurgy or amalgam corrosion of core fins, both of which can lead to sudden loss of pressure containment. Mercury-contaminated aluminum heat exchangers require close scrutiny and quantitative risk assessment to allow safe operation, remediation or to justify replacement. The risk analysis procedure involves computational prediction of mercury deposition, inspection of critical areas, detailed assessment of metallurgy and fabrication, strain analysis of temperature changes during trips and shutdowns and oxide fatigue analysis. Assigning probability of equipment failure requires a complete understanding of the mechanisms of liquid metal embrittlement and amalgam corrosion that operate on aluminum plate-fin heat exchangers. Statistical correlations to known failures are essential to assignment of probability-based risk factors. Probabilities of leak and rupture failure modes can be estimated using amounts and locations of mercury deposits determined from focused inspection or calculated thermodynamically. © 2009 American Institute of Chemical Engineers Process Saf Prog, 2009