关于吸油烟机的国家标准和IEC标准中一些错误和修订建议

本文指出了现有吸油烟机国家标准和IEC标准中的一些错误和不足之处，并提出了修订建议，可以使吸油烟机检测更符合实际，提高检测精度，提高工作效率。这些改进措施在沈阳“国家日用金属制品质量监督检验中心”经过试验，证明是切实有效的，但如要采纳为标准内容，应作进一步研究。     

Impact of metal silos on households’ maize storage,storage losses and food security: An application of a propensity score matching

Maize is the most important food staple in Eastern and Southern Africa, with a highly seasonal production but relatively constant consumption over the year. Farmers have to store maize to bridge seasons, for food security and to protect against price fluctuations. However, the traditional storage methods do not protect grain well, resulting in large postharvest losses. Hermetically sealed metal silos kill storage pests by oxygen deprivation without pesticides. Popular in Central America, they are now being promoted in Africa, but their impact here has not yet been studied. This study used propensity score matching to evaluate the impact of metal silos on duration of maize storage, loss abatement, cost of storage, and household food security. Metal silo adopters (N = 116) were matched with non-adopting farmers from a representative sample of 1340 households covering the major maize-growing zones in Kenya. The major effect of the metal silos was an almost complete elimination of losses due to insect pests, saving farmers an average of 150–200 kg of grain, worth KSh9750 (US$130). Metal silo adopters also spent about KSh340 less on storage insecticides. Adopters were able to store their maize for 1.8–2.4 months longer, and to sell their surplus after five months at good prices, instead of having to sell right after the harvest. The period of inadequate food provision among adopters was reduced by more than one month. We conclude that metal silos are effective in reducing grain losses due to maize-storage insects, and that they have a large impact on the welfare and food security of farm households. The initial cost of metal silos is high (KSh20,000/1.8 ton) and therefore policies to increase access to credit, to reduce the cost of sheet metal, and to promote collective action can improve their uptake by smallholder farmers.     

基于降息环境下分期还贷利率调整的弹性分析

从央行五次降息,到商业房贷利率下限可打七折,每个购房者都在计算这笔或多或少的息差。这次调整能给购房者以多大的实惠,对于还款的具体偿还过程的本息金额又是怎样的影响,文章基于Excel的分析,对利率调整的弹性进行剖析。     

基于ArcSDE和SQL Server 2005的城乡动态监测集成数据库的构建——以义乌市城乡动态监测集成数据库为例

海量城乡动态监测数据的组织和管理是城乡动态监测亟待解决的问题。本文以义乌市城乡动态监测集成数据库为例,在对城乡动态监测集成数据库特点进行深入分析的基础上,介绍了基于ArcSDE和SQL Server 2005的城乡动态监测集成数据库设计及构建流程,并对城乡动态监测数据分类与编码、数据库逻辑设计及数据库存储设计进行了详细阐述。     

How Big is the Crowding-Out Effect of User Fees in the Rural Areas of Ethiopia? Implications for Equity and Resources Mobilization

Using a nested multinomial logit model, this study investigates the demand “reduction” and “diversion” effects of user fees in rural areas of Ethiopia. The results reveal that an increase in user fees of public clinics, which are the most widely used alternative, can have a significant demand reduction effect on the poorest of the poor. This implies that despite cost recovery has been advocated as an alternative means of health care financing in most of the developing world, increasing user fees may drive the poorest segment of the population out of the health care market unless some protective measures are taken.     

城市扶贫政策的消极性缺陷及其改进途径

认为"积极福利"的核心理念是无责任即无权利,其具体的实施维度可以丰富和重构为四个方面,即保障生活、提升资本、增加权利和增强动力,其中资本包括人力资本和社会资本.从"积极福利"的角度看,我国现行城市扶贫政策存在较为明显的消极性,即侧重于从外部对贫困者进行基本生活救助,而相对忽视了挖掘和激发贫困者自身的潜能,这不利于搞好城市扶贫工作和构建和谐社会,应营建更加积极的城市扶贫政策.     

Debt rescheduling and the choice between bonds and loans for LDCs' foreign debt

This paper examines less developed country (LDC) borrowers' choice of financing methods. I devleop and test the hypothesis that ex-ante consideration of rescheduling affects LDC borrowers' choice between bonds and commercial loans. Banks can monitor and distinguish between permanent and temporary shocks, while bondholders cannot. Therefore, debt rescheduling based on the nature of economic shocks is feasible with loan financing. Our empirical findings indicate the debt rescheduling is considered exante in LDC lending. In addition, default risk and contract size affect the choice of financing instruments.     

Equal opportunity and poverty reduction: How should aid be allocated?

This paper analyzes a model of aid allocation equalizing the opportunity between recipient countries to reach a common poverty reduction goal. We propose a fair and efficient aid allocation based on a multicriteria principle. The model considers structural handicaps in recipient countries in terms of lack of human capital and economic vulnerability, their initial poverty, and the natural gap between the growth rate required to reach a development goal and the observed one. We show that our proposed aid allocation favors poor and vulnerable countries with our multicriteria principle. It substantially differs from the observed allocation. Analyses also shed light on the impact of the donors' aversion to the low natural growth gap in recipient countries on the optimal aid allocation and the marginal efficiency of aid.     

滇西北地区耕地利用存在的问题及对策

滇西北地区山高坡陡，区位特殊，耕地总量少，坡耕地多，陡坡种植面积大，农业生态环境脆弱。随着滇西北地区保护与发展行动计划在该区域实施，必须加大投入力度，加快基本农田建设步伐，彻底改善农业生产条件，提高耕地单位面积产量。同时要加快退耕还林还草，改善区域生态环境。     

论林业在应对气候变暖中的重大作用

全球气候变暖将严重损害经济发展,但开展化石燃料减排执行难度大,许多国家采取生物固碳减排。林业在应对气候变暖中具有不可替代的作用、潜力巨大。初步结算,我国林业每年可减排和吸收CO2当量的潜力为30亿t以上,并具有可持续性。若能开发潜力的50%,年均增加减排量则相当于我国目前碳排放增长的4倍。为此我国应增加科技、资金投入,加快林业发展步伐,完善政策,建立国内碳汇交易机制,积极应对气候变暖。