九州硅岛的发展与日本产业集群计划

美国硅谷的成功,促使许多国家纷纷进行效仿。九州硅岛很早就致力于产业集群的实践,21世纪初,日本进一步明确地提出了在全国范围内实施产业集群计划,其经验对我国实施产业集群战略具有一定的借鉴意义。     

气相色谱法测定矿物岩石中二氧化碳的研究

本文以磷酸为溶剂，采用一种新的装置溶解矿物岩石样品，气相色谱法测定二氧化碳。测定的碳酸盐标样和硅酸盐标样中的二氧化碳的相对误差分别为０．２％和－４７％；相对标准偏差分别为１．０％和３．３％。该法简单、快速，不仅适于测定矿物岩石中低含量二氧化碳，也可以测定高含量二氧化碳。     

钛白废酸回收技术研究

通过臭氧氧化技术将钛白废酸中的Fe2 氧化成Fe3 ,再用萃取法除去Fe3 。考察了络合剂(盐酸)浓度、萃取剂、萃取相比和多级错流萃取级数等对Fe3 萃取率的影响,初步探索了反萃法回收萃取剂及萃取剂的循环利用。结果表明,当盐酸浓度为3.4～4.0mol/L时,几乎可完全络合溶液中的Fe3 ,Fe3 的萃取率随相比(O/W)的增加而增大,萃取级数愈多萃取效果愈好。O/W=1∶1的单级萃取与总相比O/W=0.5∶1的四级错流萃取率接近。当反萃相比(W/O)=1.5∶1时,Fe3 的反萃率达97%,萃取剂经过6次萃取—反萃循环后,Fe3 的萃取率没有明显下降。去除Fe3 后的钛白废酸,经蒸馏浓缩到70%左右,再与浓硫酸混合后可用于钛白粉的生产,蒸馏过程中得到的盐酸循环使用,反萃出来的Fe3 可作为生产铁红的原料。     

立足全球 保障资源需求

在全球经济一体化的形势下,为保障我国矿产资源的供应,必须实施全球资源战略.文章分析了我国矿产资源状况及我国对矿产资源的需求,并就实施战略资源储备,介绍了一些国家的具体办法,提出了若干对策和举措.     

Farming systems and Conservation Agriculture: Technology,structures and agency in Malawi

Conservation Agriculture (CA) is advocated as an agricultural innovation that will improve smallholder famer resilience to future climate change. Under the conditions presented by the El Niño event of 2015/16, the implementation of CA was examined in southern Malawi at household, district and national institutional levels. Agricultural system constraints experienced by farming households are identified, and in response the technologies, structures and agency associated with CA are evaluated. The most significant constraints were linked to household health, with associated labour and monetary impacts, in addition to the availability of external inputs of fertiliser and improved seed varieties. Our findings show that such constraints are not adequately addressed through current agricultural system support structures, with the institutions surrounding CA (in both Government extension services and NGO agricultural projects) focusing attention predominantly at field level practice, rather than on broader system constraints such as education and health support systems. Limited capacity within local institutions undermines long term efforts to implement new technologies such as CA. It is vitally important that the flexibility of farmers to adapt new technologies in a locally-appropriate manner is not closed down through national and institutional aims to build consensus around narrow technical definitions of a climate-smart technology such as CA. To enable farmers to fully utilise CA programmes, interventions must take a more holistic, cross-sectoral approach, understanding and adapting to address locally experienced constraints. Building capacity within households to adopt new agricultural practices is critical, and integrating healthcare support into agricultural policy is a vital step towards increasing smallholder resilience to future climate change.     

三种不同蒸馏仪器测定食品中二氧化硫含量的对比

目的:比较传统玻璃蒸馏瓶蒸馏装置、二氧化硫测定仪、自动凯氏定氮仪3种仪器测定食品中二氧化硫的效果及适用性,为设备选型提供参考.方法:选取番薯干、咸菜、香菇干,分别用上述3种蒸馏装置测定样品中的二氧化硫含量,分析测定结果和过程控制.结果:使用3种不同蒸馏仪器测定结果无显著性差异,两次独立测定结果的绝对差值小于算术平均值的10%,回收率均在85%~95%.结论:二氧化硫测定仪自动化程度高,安全性高,基本可以替代传统玻璃蒸馏瓶蒸馏,实现大部分食品的批量检测,对于香菇干等蒸馏过程易倒吸食品,可采用自动凯氏定氮仪检测,提高实验的准确性和可靠性.     

Is socially responsible investment useful in Mexico? A multi-factor and ex-ante review

The present paper continues the firsts reviews made to socially responsible investment in Mexico. We extended these reviews by using a non-parametric multivariate equality test, along with a multi-factor market cap model, and a Monte Carlo simulation. Our results show that the IPCS index, the IPCcomp and the IPC have a statistically equal mean-variance performance, suggesting that this sort of investment style (SRI) is a good substitute of the broad market investment style in the long term. Among the causes of this finding is the fact that the IPCS and the IPCcomp indexes have almost the same large and small cap stock concentration and the IPC index (a large-cap one) is not as diversified and mean-variance efficient as the former.     

中国人口老龄化与碳排放的关系——基于因素分解和动态面板的实证分析

利用中国1990～2008年全国层面和1995～2008年省级层面的数据,分别采用LMDI因素分解法和动态面板的GMM估计方法,对中国人口老龄化与碳排放之间的关系进行了考察。全国层面的因素分解结果表明,老龄化是中国近年来人均碳排放增加的重要原因。动态面板模型的估计结果表明,老龄化与碳排放之间存在显著的倒U型曲线关系。对老龄化不同影响渠道的研究则表明,当前老龄化主要是通过生产渠道对碳排放的增加产生促进作用,而消费渠道的影响很不明显。     

Sustainable development. With or without mankind?

The author challenges the conventional wisdom that the main risk to Western development is environmental degradation caused by mankind. Concern over the greenhouse effect and global warming have more to do with millenium fever than reality. There is still very little evidence to suggest that these environmental phenomena result from human activity. What we do know is that there have been major cyclical fluctuations throughout history. The author cautions against implementing ‘scientistic’ policies in the face of such doubts, just because it is trendy to do so.     

国有商业银行费用偏好与组织绩效的实证分析

单一国有产权结构、出资人监督缺位和委托代理问题共同决定了国有商业银行费用扩张偏好.实证结果表明,费用规模扩张侵蚀了出资人利润性收益空间,成为国有商业银行利润率指标偏低的解释因素.因此,国有商业银行制度变迁必然包含能够抑制费用偏好的制度工具创新.政府宏观经济目标的退出可以使出资人硬化利润约束,但在政府效用函数不可能全面退出国有商业银行的现实背景中,通过引进在位寡头之间的竞争可以为国有商业银行利润目标约束硬化提供外在制衡条件;同时,产权多元化改革基础上的银行治理结构完善则是解决委托-代理问题下经营者费用偏好问题的彻底措施.