社会资本、技术感知对茶农有机肥替代化肥技术采纳行为影响研究——基于江苏省茶叶主产区溧阳市茶农调研数据

基于江苏省茶叶主产区溧阳市365位茶农的调研数据,通过结构方程模型分析社会资本、技术感知与茶农有机肥替代化肥技术采纳行为之间的关系,并揭示了不同个人特征和家庭禀赋对茶农技术采纳行为存在异质性影响,以期促进溧阳市茶业绿色化、有机化。结果发现:①社会资本和技术感知正向促进茶农有机肥替代化肥技术采纳行为。②社会网络在技术易用性感知;社会信任在技术有用性感知和易用性感知;社会规范在技术有用性感知对茶农技术采纳行为存在中介作用。③茶农个人特征和家庭禀赋对其有机肥替代化肥技术采纳行为影响有着显著差异性,主要表现在性别、年龄、种植年限和茶园种植面积四个方面,受教育程度、家庭从事茶叶种植人数、茶叶生产年收入占家庭年收入的比值这三个方面并没有表现出显著差异。

非转基因大豆种植区消费者对转基因大豆油购买意愿实证研究

虽然转基因食品已通过商业化运作进入到人们的日常消费,但是关于转基因食品的争议却从未消失,消费者对转基因食品可能存在的风险仍有疑问,这些疑问增加了购买的不确定性。利用黑龙江省调研数据,运用结构方程模型,分析感知风险、涉入程度对消费者转基因大豆油购买意愿的影响发现:消费者对转基因大豆油的健康风险、后代风险、功能风险、个体心理风险、社会外在影响风险对其购买意愿存在显著负向影响;消费者产品涉入程度、购买涉入程度对转基因大豆油购买意愿影响不显著;消费者的涉入程度通过感知风险间接影响转基因大豆油购买意愿;不同人口特征变量的消费者的感知风险、涉入程度、购买意愿不存在显著的差异性。

河南省农村产业融合测度及对农民收入影响分析

通过构建河南省农村产业融合评价指标体系,运用熵值法对河南省农村产业融合水平进行了测度与分析;并基于2008~2018年河南省面板数据,运用固定效应模型实证分析了农村产业融合对农民收入的影响。研究发现,河南省农村产业融合发展水平逐年提升且对农民收入具有明显的影响。鉴于此,提出了政府应着力发展农业加工业,努力打通农产品加工产业链条;充分挖掘河南乡村生态资源价值,让生态产业化,从而吸引社会资本流入乡村地区;拥抱新经济、新技术催生农村地区新经济发展的对策建议。

供应链库存成本模型最优值的研究

文中考虑了客户存在缺货现象和提前期对客户订货和生产商生产的影响,建立了供应链库存成本模型。该模型存在最优订货量、最优缺货量和最优订货次数,最后通过数值分析方法分析了最优值之间的关系。

Further Study of A-Related Quantum Interference of H-State Diatomic on Collision-Induced Rotational Energy Transfer

In our previous theoretical studies [Meng-Tao Sun, Yong-Qing Lee, and Feng-Cai Ma, Chem. Phys.Left. 371 （2003） 342], we have reported the quantum interference on collision-induced rotational energy transfer on CO （A ^1 Π,v = 3） with inert gases, which originates from the difference between the two A-related collision potential energy surfaces. The interference angle, which measures the degree of coherence, is presented in this paper. Based on the time-dependent first order Born approximation, taking into account the anisotropic Lennard-Jones interaction potentials, the relation of the interference angle with the factors, including experimental temperature, partner, and rotational quantum number, are obtained. The changing tendencies with them are discussed. This theoretical model is important to understanding and performing this kind of experiment.

Interference Angle on Quantum Rotational Energy Transfer in Na+Na_2 (A^1Σ_u^+,v = 8～b^3Π_(Ou), v = 14) Molecular Collision System

In order to study the collisional quantum interference （CQI） on rotational energy transfer in atom-diatom system, we have studied the relation of the integral interference angle and differential interference angle in Naq-Na2 （A1 ∑u^＋,v=8-b^3∏0u,v=14） collision system. In this paper, based on the first-Born approximation of timedependent perturbation theory and taking into accounts the anisotropic effect of Lennard-Jones interaction potentials, we present a theoretical model of collisional quantum interference in intramolecular rotational energy transfer, and a relationship between differential and integral interference angles.

Collisional Quantum Interference on Rotational Energy Transfer： Relation Between Integral Interference Angle and Rotational Quantum Number in Na2（A^1∑u^＋,ν=8～b^3∏0u,ν=14）-Na System

Collisional quantum interference （CQI） on rotational energy transfer was observed in Na2（A^1∑u^＋,ν=8～b^3∏0u,ν=14） system in collision with Na [Chem. Phys. Lett. 318 （2000） 107], and the degree of the interference was measured. The integral interference angle was obtaJned through theoretical calculation. We will research the factors that have effect on collisional quantum interference on rotational energy transfer in Na2（A^1∑u^＋,ν=8～b^3∏0u,ν=14）-Na system. Basing on the time-dependent first order Born approximation, and taking into account the anlsotroplc Lennard Jones interaction potentials and ＂straight-line＂ trajectory approximation, we obtain the factors that have effect on CQI in Na2-Na system, and obtain the relation between the integral interference angle and rotational quantum number.

互联网使用、社会资本与农村居民膳食质量改善——基于黑龙江省微观调查数据分析

互联网在农村地区的嵌入为农村居民社会资本积累与膳食质量改善提供了新的技术赋能。基于信息效应理论和社会资本理论,以黑龙江省为例,利用316户农村家庭实地调研数据,运用OLS模型和中介效应模型,分析互联网使用对农村居民膳食质量的微观作用,探讨社会资本的中介效应。结果表明,黑龙江省农村居民膳食质量处于低度膳食失衡状态,膳食质量距均值为34.133。互联网使用能够显著改善农村居民膳食质量,可以通过社会资本的部分中介效应对农村居民膳食质量产生正向影响。异质性分析表明,互联网使用对农村居民膳食质量的改善作用在高学历和种植规模较大的群体中更为显著。据此,提出了扎实推进合理膳食行动,促进农村居民膳食营养均衡;向纵向深发展“互联网+营养与膳食”模式;拓展农村居民互联网社交新渠道,提升社会资本存量等建议。