Does Security of Land Operational Rights Matter for the Improvement of Agricultural Production Efficiency under the Collective Ownership in China?

Under the “separation of three rights” policy, the impact of security of land operational rights on agricultural production efficiency has attracted much attention in recent years. Data envelopment analysis and mediation effect analysis were applied to 888 family farms run by new‐type agricultural operators from Songjiang to identify the mechanism of the effect of land operational rights security on agricultural production efficiency through long‐term investment. The results show that greater security of land operational rights generally increased agricultural production efficiency. Approximately 37.94 percent of the impact could be explained by long‐term investment. The results also indicate that significant heterogeneity exists in the effect of land operational rights security on agricultural production efficiency at various levels of the family farms’ efficiency distributions. It is suggested that government should legalize land operational rights and give them a status equal to those of households’ contractual rights and land ownership rights in China's future land tenure reform.     

基于能值分析的农业经营主体可持续发展能力研究

[目的]通过对农业经营主体可持续发展能力测算方法的研究及可持续发展能力的实证分析,为提高农业经营主体可持续发展能力及培育新型农业经营主体提供理论支持和经验参考。[方法]借助典型案例调查及官方统计数据,采用物质—价值流和能值分析法对农业经营主体可持续发展能力问题展开研究。[结果]物质—价值流实证结果表明,家庭农场、种植大户和普通农户的单位土地净收入分别为1.778 4万元/hm~2、1.153 1万元/hm~2和0.439 6万元/hm~2;能值分析实证结果显示,家庭农场、种植大户和普通农户的可持续发展指数依次为24.49、4.21和3.58。[结论]从经济效益和可持续发展能力的视角来看,新型农业经营主体优于普通农户,家庭农场单位土地净收入最高,有较大的发展空间,可持续发展能力最大。     

单位球上调和Dirichlet空间上的分式线性复合算子

研究了单位球上调和Dirichlet空间上的分式线性复合算子的伴随表示,并在此基础上讨论了空间■h(BN)和■h0(BN)上的分式线性复合算子的正常性与本性正常性.     

基于IFHA算子的水利工程总承包模式选择

为了提供一种公正、合理的水利工程总承包模式选择方法,将IFHA直觉模糊混合平均算子引入水利工程总承包模式决策模型,在建立适用于水利工程的选择指标体系和重新对总承包模式进行细分的基础上,利用IFHA直觉模糊混合平均算子确定指标权重,并集结各专家选择判断意见,利用IFWA直觉模糊加权算子集结各备选模式所有指标判断信息,最终得到备选模式综合指标值,确定某特定水利工程适用的总承包模式。经算例分析,验证该模型符合工程实际,且充分削弱了专家主观性影响,保证了判断信息在集结过程中的完整性。     

德育工作者思维预见力的培养探析

面对复杂多变、动态发展的社会现实和人的思想,为了取得德育工作的主动权、增强德育工作的针对性和实效性,德育工作者应培养自己的思维预见力,明确使命,增强忧患意识,加强理论修养,不断拓宽自己的知识面,加强调查研究,运用科学思维方法,科学把握事物的规律性和趋势。     

基于语言评度算子的分包商选择研究

从建筑总承包企业的角度出发,分析了影响分包商选择的各项因素,以此为基础构建了分包商承包能力评价的多层次指标体系,提出利用语言信息算子(LWM算子和HLWA算子)对分包商进行评价和排序,算例证明这是一种科学合理、可操作性强的分包商评价与选择方法。     

Using fuzzy analytic hierarchy process to evaluate service performance of a travel intermediary

This study applies a fuzzy analytic hierarchy process (AHP) to evaluate service performance of a foreign travel intermediary (destination tour operator, DTO) through the host travel agency's vision. Service performance is a composite of various attributes, including many intangible attributes difficult to measure. Therefore, the present research adopts an AHP method and further integrates a fuzzy set theory into the service performance measurement to overcome the problem. This work collected evaluation criteria from 36 senior travel managers’ opinions, using the critical incident technique, and 56 general managers from different travel agencies to weight and rank the overall criteria by applying fuzzy AHP. Research results could help DTOs increase service performance and quality, and provide Asian travel agencies with objective standards to evaluate the most suitable business cooperators.     

浅论3G时代基于电信运营商视角的价值链策略

进入3G时代后,由于无线网络数据传输能力的提升,电信业务与网络相分离的现象越发明显,产业链演变迅速,运营商急需找准定位并采取相应策略,以实现价值链成员的共赢。     

旅行社计调职业能力指标体系构建

近年来我国旅游业迅猛发展，处于旅行社核心地位的计调及其所具备的职业能力关系到整个旅游业的健康、可持续发展，因此对计调职业能力指标体系的探讨具有重要意义。计调职业能力指标体系包括职业知识、职业素养、职业技能三方面的内容，品质修养是其中最重要的指标。     

Nφ型商模上的Toeplitz算子：相似性,酉等价性,约化子空间

利用张量积,研究了Nφ型商模上的符号为一般有限B laschke积的解析Toep litz算子的相似性、酉等价性及极小约化子空间.