黑龙江省与江浙地区民营科技企业的总体发展比较研究

在介绍黑龙江省及江浙地区民营科技企业总体发展现状的基础上,通过对黑龙江省及江浙两省民营科技企业的科技投入和发展规模以及总收入情况的比较分析,提出发展黑龙江省民营科技企业的对策,这些对策将有利于改善黑龙江省民营科技企业的市场环境,提高黑龙江省民营科技企业自主创新能力,从而进一步促进黑龙江省民营经济发展。     

黑龙江省与江浙地区民营科技企业的总体发展比较研究

在介绍黑龙江省及江浙地区民营科技企业总体发展现状的基础上,通过对黑龙江省及江浙两省民营科技企业的科技投入和发展规模以及总收入情况的比较分析,提出发展黑龙江省民营科技企业的对策,这些对策将有利于改善黑龙江省民营科技企业的市场环境,提高黑龙江省民营科技企业自主创新能力,从而进一步促进黑龙江省民营经济发展.     

黑龙江省农业生产效率分析

本文利用DEA方法分析了黑龙江省县域层面上的农业生产效率,并基于效率分析了黑龙江省农业生产的可持续性.研究得出黑龙江省农业生产依靠外界投入的农业可持续性在下降,而黑龙江省农业生产技术的应用使得农业可持续性增强.黑龙江省越来越多的县(市)农业可持续性是增强的.     

黑龙江省财政支出结构问题分析及优化思路

黑龙江省财政支出规模近年来不断增加,但在财政支出结构上仍存在一些亟待解决的问题.因此,如何优化财政支出结构已成为黑龙江省财政体制改革的必然选择.本文是从黑龙江省财政支出结构及其变化情况出发,根据黑龙江省财政支出的实际情况进行调研,进而分析黑龙江省财政支出结构中存在的问题,并提出了调整优化的建议.     

黑龙江省财政支出结构问题分析及优化思路

黑龙江省财政支出规模近年来不断增加,但在财政支出结构上仍存在一些亟待解决的问题。因此,如何优化财政支出结构已成为黑龙江省财政体制改革的必然选择。本文是从黑龙江省财政支出结构及其变化情况出发,根据黑龙江省财政支出的实际情况进行调研,进而分析黑龙江省财政支出结构中存在的问题,并提出了调整优化的建议。     

关于黑龙江省财政支农资金若干问题的探讨

分析了黑龙江省财政支农资金的运行状况,探讨了黑龙江省财政支农资金存在的问题,提出了加强黑龙江省财政支农资金的对策。     

黑龙江省农业可持续发展评价与对策研究

该文利用相关统计资料建立了黑龙江省农业可持续发展评价指标体系，并应用模糊综合评价法对黑龙江省农业可持续发展能力进行评价。结果表明黑龙江省农业可持续发展总体水平相对较高，但区域性差异非常明显，最后根据评价结果提出黑龙江省农业可持续发展的对策。     

黑龙江省首次举办自然保护区风光摄影展览

由黑龙江省林业厅、中国摄影家协会黑龙江分会、黑龙江省野生动物保护协会、省人民政府自然保护区和狩猎办公室、省博物馆五单位共同举办的首届“黑龙江省自然保     

黑龙江省经济与环境协调发展问题及对策

近年来黑龙江省经济与环境协调发展问题十分突出，制约了经济社会发展，必须选择一条适合黑龙江省经济与环境协调的可持续发展道路。针对黑龙江省经济与环境协调发展存在的问题进行深刻分析，提出了促进黑龙江省经济与环境协调发展的对策建议。     

黑龙江省经济与环境协调发展问题及对策

近年来黑龙江省经济与环境协调发展问题十分突出,制约了经济社会发展,必须选择一条适合黑龙江省经济与环境协调的可持续发展道路。针对黑龙江省经济与环境协调发展存在的问题进行深刻分析,提出了促进黑龙江省经济与环境协调发展的对策建议。     

面粉中含砂量测定的不确定度评定

本文依据《粮油检验粉类粮食含砂量测定》对面粉中含砂量进行测量,并对其测量结果进行不确定度分析,探究影响测量过程中不确定度分量来源并进行评定。分析得出,扩展不确定度为0.0004%,面粉中含砂量测定结果为0.017%±0.0004%(k=2)。     

Evaluation of forestland use in mining operation activities in Turkey in terms of sustainable natural resources

Mining has been necessary for human activities and is conducted in line with this need. The location of mines must sometimes be where land use overlaps with other activities because the location of the mined substance cannot be changed. In Turkey, forestland are the most common of these overlapping areas. Therefore, mining has frequently occurred on forestland in Turkey—and worldwide. After the mining operation activities are conducted, the forestland are rehabilitated and returned to the forest administration. The examination of used and returned areas provides an opportunity to create an optimal situation between “mining for sustainable development” and “protection of forestland.”Accordingly, several questions, such as mining production amounts, degrees of social and economic development of the cities in which enterprises are conducting mining, the quantity of the areas they used for mining activities in forestland, the areas which were returned to the forest administration, operating license areas and operation permit areas, and the life of mining operation, were asked to the mining enterprises in Turkey through the “Survey Monkey” program in 2018. Thus, according to mineral groups, different land use rates were compared with the operating license areas, and the land uses for each mineral group were analyzed by considering the operation activity periods. The results indicate that the sustainability of the use of forestry in mining activities in Turkey has changed in a positive direction, particularly because of changes in mining and environmental legislation in Turkey over the last decade.     

分光光度法测定食品中亚硝酸盐不确定度评估

本文根据《测量不确定度评定与表示》(JJF 1059.1—2012)和《食品安全国家标准食品中亚硝酸盐与硝酸盐的测定》(GB 5009.33—2016),利用分光光度法对食品中亚硝酸盐的含量进行测定,建立数学模型对亚硝酸盐含量测定的不确定度来源分量进行计算、分析,食品中亚硝酸盐的测定结果可以表示为X=(11.2±0.70)mg·kg^-1,k=2,为评价试验测量结果的真确性提供科学依据。     

食品中金黄色葡萄球菌定量检测的不确定度评定

为提高食品中金黄色葡萄球菌定量检测结果的准确性,本文对测量不确定度进行分析和评定.按照《食品安全国家标准食品微生物学检验金黄色葡萄球菌检验》(GB 4789.10—2016)第二法金黄色葡萄球菌平板计数法对人工染菌的乳粉样品进行检测,按照《测量不确定度评定与表示》(JJF 1059.1—2012)分析不确定度来源、评定...     

Assessment of implementation of protection of mineral deposits in spatial planning in Poland

A complex of raw materials available in a given commune shapes its functional − spatial structure and affects local economic development. The use of the resource base of minerals depends largely on the management of the space and respecting the zoning restrictions connected with protection of mineral deposits. The urgent need to protect them is due to their non-renewable nature and progressive development of the land. Preserving access to deposits is essential to ensure future mineral supply necessary for the economic development. This article presents the results of the assessment of implementation of rules of protection of mineral deposits in spatial planning at the level of territorial units in Poland.The study has been conducted in twenty-three communes of the Lesser Poland voivodeship, for thirty-one unexploited mineral deposits designated for protection in the Spatial Development Plan of the Lesser Poland (Małopolskie) Voivodeship of 2003. In the study of conflict with development of the selected mineral deposits with the environment, factors related to land use, forms of nature protection, water conservation and planned land development have been evaluated. The assessment has taken into account the importance of individual factors of conflict by giving them weights by means of pairwise comparison method. Five classes of conflict of the deposit management have been proposed: non-conflicting deposit, small conflict, medium conflict, major conflict and very big conflict. Almost equal numbers of deposits (9) belong to the class characterized by a of medium, small and large conflicts. Road and technical projects as well as expected significant impact of exploitation on the environment restrain exploitation. The impact is related to the necessity of use of explosives during the exploitation and by the cumulative effect of the mining activity already existing nearby. Analysis of the planning documents of the communes has shown both inadequate protection of mineral resources, including designation of areas of deposits for single-family housing, and a few examples of properly maintained spatial planning in the field of protection of mineral deposits. Information obtained from the environmental survey has been supplemented by assessment of the social aspect. In nine communes it has been determined that the areas of mineral deposits are not subject to spatial conflicts but in seven communes there is opposite situation. The most important benefits from the mineral exploitation which has been indicated in the studied documents included: jobs, access to construction materials and development of the commune.Present work allowed to define the areas and the scale of conflicts induced by development of mineral deposits and to propose measures for rational management of mineral resources. Recognition of the existing and potential conflicts can help to make the right decisions concerning development of the area and minimising impacts of exploitation of the mineral deposits.     

天津市七里海滨海湿地沉积物重金属元素的空间分布特征

对七里海滨海湿地沉积物6种重金属元素进行系统分析,结果表明Cu、Zn、Pb、As、Cd 5种元素在沉积物中含量相对稳定,Hg元素在湿地沉积物中分布不均匀,变化较大。富集度分析表明,七里海滨海湿地重金属富集度划分为元素适中、轻度富集、中度富集3个级别,元素富集程度依次为Cd＞Cu＞Zn＞Pb＞Hg＞As,As元素基本介于元素适中和元素贫乏之间, Cu、Zn、Pb、Hg 4种重金属达到了轻度富集,说明该区已受到轻度污染,Cd元素已到达中度富集,说明该区已受到中度污染,应引起重视。     

试析牛对清代台湾乡村社会发展的贡献

清代台湾社会开发的主力军是闽粤移民，但牛在乡村社会的发展中，充当了极重要的生产力角色。牛在台湾乡村社会的土地开垦与工商业发展中独当一面，在民众生活甚至风俗中也占显要位置。牛是清代台湾乡村社会发展过程中不可缺少的重要动力。     

农用地定级中区位因素定量化存在的问题及其改进

通过介绍目前农用地定级工作中区位因素定量化处理的一般方法,分析了目前区位因素定量化过程中存在的问题,如空间距离量算、阻隔与通道、衰减模型、定级区域外的区位因素影响等,并提出了相应的改进措施,以使定级结果尽可能的符合实际.     

Decomposition of gender differentials in agricultural productivity in Ethiopia

A number of studies document gender differentials in agricultural productivity. However, they are limited to region and crop‐specific estimates of the mean gender gap. This article improves on previous work in three ways. First, data representative at the national level and for a wide variety of crops is exploited. Second, decomposition methods—traditionally used in the analysis of wage gender gaps—are employed. Third, heterogeneous effects by women's marital status and along the productivity distribution are analyzed. Drawing on data from the 2011–2012 Ethiopian Rural Socioeconomic Survey, we find an overall 23.4 percentage point productivity differential in favor of men, of which 13.5 percentage points (57%) remain unexplained after accounting for gender differences in land manager characteristics, land attributes, and access to resources. The magnitude of the unexplained fraction is large relative to prior estimates in the literature. A more detailed analysis suggests that differences in the returns to extension services, land certification, land extension, and product diversification may contribute to the unexplained fraction. Moreover, the productivity gap is mostly driven by non‐married female managers—particularly divorced women—; married female managers do not display a disadvantage. Finally, overall and unexplained gender differentials are more pronounced at mid‐levels of productivity.     

济宁地区酱菜中乳酸菌的筛选与鉴定

目的:对从酱菜中筛选出的优质乳酸菌进行形态学观察、探究其最适生长pH,并筛选出降解亚硝酸盐能力强的乳酸菌株。方法:采用平板计数法进行菌数测定,采用革兰染色法对乳酸菌进行观察,利用分光光度法测定乳酸菌在不同PH培养液中OD值。结果:从酱菜中提取出的乳酸菌为革兰氏阳性菌,最适生长pH为6。最终分离得到降解亚硝酸盐能力强的LD-1乳酸菌。结论:酱菜含有乳酸菌并成功筛选出降解亚硝酸盐能力强的乳酸菌。