黑龙江省森林植物园观果树种的引种及应用

介绍了黑龙江省森林植物园引种成功的观果树种及其在园林绿化中的应用情况和建议.     

Behavioural factors in young people's fruit consumption

This study aims to find out the determinant factors affecting fruit consumption behaviour in Portuguese young people, based on the Health Action Process Approach (HAPA) model, and determine if this model explains differences according to gender, age and rural/urban environments. This research is innovative because it tests the HAPA model with young people, and because it adds social support to the HAPA model as an extra predictor of young people's behaviour. To gather the data, a questionnaire survey was applied in two public schools, one in a rural area and the other in a city. The survey was answered by 266 Portuguese young people, aged 15–21 years, from the 10th to the 12th grades. Authorization for the survey was given in advance, from the Ministry of Education, schools and parents, after which the survey was performed. Before applying the questionnaire, two pre‐tests were carried out, each with ten participants and with similar characteristics to the population studied. This study analyses action self‐efficacy, outcome expectancies, action planning, risk perception, intention, maintenance self‐efficacy and social support variables. The result was obtained through a two‐step process, by determining the measurement and structural model, using Smart PLS 2.0. The results show that young females have more factors determining fruit consumption, with greater social support for action self‐efficacy, greater maintenance self‐efficacy through action self‐efficacy, and greater perception of risk regarding fruit consumption. In terms of age, young people over 16 years present greater outcome expectations for the intention, greater perception of risk and action self‐efficacy for fruit consumption. The multi‐group analysis referring to differences between young people living in rural or urban environments did not show proof of the model giving a better explanation of one situation or the other. It can be concluded that the HAPA model is appropriate to the investigation of behaviour factors that influence young people's fruit consumption. The results also indicate that in the scope of the behaviour analysed the proposed model gives a better explanation for females and for those over 16 years.     

煤矿井下锚杆支护粉尘防治现状和发展方向

介绍了煤矿粉尘的危害和煤矿粉尘的性质,分析了锚杆支护粉尘防治现状和锚杆钻车干式除尘,评述了锚杆支护粉尘防治发展方向。     

我国果农在水果供应链中的现状及对策分析——以柑橘为例

果农作为柑橘水果供应链的重要组成部分，由于多方面因素的影响，并没有享受到供应链所带来的收益。该文对我国果农在柑橘水果供应链中的现状及原因进行了分析，然后提出了对策建议。     

水电站电气设备干燥

文章介绍了水电站发电机定、转子绕组和其它设备的干燥方法,是为了供水电施工参考。     

废干电池和钛白废酸制取锰锌铁氧体研究

我国每年报废上百万吨的废干电池，钛白工业也会产生大量的废硫酸，这不仅浪费了资源，还严重污染了环境。根据废干电池和钛白废硫酸的特点，本工艺研究用钛白废硫酸浸出废干电池，通过硫化、氧化加热、置换、水解、氟化等净化除杂后，采用共沉淀法制取锰锌铁氧体，产品初始磁导率达8000以上，杂质质量分数小于10-4。该工艺采取以废治废，废物中的主要成分不需相互分离即可制取高附加值的锰锌铁氧体，少量的杂质元素可通过净化脱除并进行处置。     

绿色加工技术中刀具问题的研究

本文对绿色加工技术中刀具问题进行了探讨,从三个方面介绍了目前高速干切削加工工艺下刀具问题的研究思路,并对三种思路进行评价。     

带粘滞阻尼器结构随机风振响应分析

本文针对带粘滞阻尼器的高层建筑结构的随机风振响应和等效静态设计风载取值进行了系统研究。采用复模态理论解耦,并利用随机振动理论获得结构风振响应的解析式,建立了将结构分解为一系列等效单自由度体系的一般方法,继而利用等效单自由度体系随机风振响应的解析解,获得了带粘滞阻尼器的高层建筑结构基于现行规范Davenport谱随机风振响应的解析解,并给出算例,从而建立了非经典阻尼非对称的被动控制结构基于Davenport谱随机风振响应和风载取值的一般解析方法。     

消费者果蔬类农产品购买渠道选择行为研究——基于乌鲁木齐市消费者的调查

通过对消费者果蔬类农产品购买地点的选择及购买频率、购买渠道的选择和关注因素以及消费者个人特征与购买地点选择的调查研究发现,超市将逐渐成为果蔬类农产品零售的一个重要的营销渠道。超市应克服在果蔬类农产品经营方面存在的困难,合理规划超市选址与布点,有效划分与安排超市果蔬类农产品的经营区域,控制果蔬类农产品的销售价格,保持果蔬类农产品的新鲜度,加强果蔬类农产品品牌建设,以提升超市果蔬类农产品的竞争力。     

The Clean Development Mechanism’s Low-hanging Fruit Problem: When Might it Arise,and How Might it be Solved?

It is widely recognized that industrialized countries’ commitments under the Kyoto Protocol to reduce their greenhouse-gas emissions will be far less costly to achieve if they can be met at least in part through investment in cheap abatement options available in developing countries, as is permitted under the Protocol’s Clean Development Mechanism. Developing-country NGOs and others involved in the policy debate on the CDM have frequently raised concerns, however, about the so-called “low-hanging fruit” problem. The standard characterization of this problem is that if developing countries allow their cheap abatement options to be used now, they may find themselves worse off in future when they take on emissions-reduction commitments of their own, because only expensive abatement options will remain. We show that under plausible CDM-market imperfections a low-hanging fruit problem may indeed arise, but that the standard characterization of the problem is incorrect. We also present a potential solution, based on mandating a “virtual” option clause in CDM-investment contracts.