Preparation and Dynamic Tensile Behavior of C200 Green Reactive Powder Concrete

A new type of green reactive powder concrete (GRPC) with compressive strength of 200 MPa is prepared by utilizing composite mineral admixtures, natural fine aggregates, and short and fine steel fibers. The quasi-static mechanical properties (mechanical strength, toughness, fracture energy and interfacial bonding strength) of GRPC specimens, cured in three different types of regimes, are investigated. The experimental results show that the mechanical properties of the C200 GRPC made with the powder binders that is composed of 40% of Portland cement, 25% of ultra fine slag, 25% of ultra fine fly ash and 10% of silica fume are better than the others'. The corresponding compressive strength, flexural strength and fracture energy are more than 200 MPa, and 30 000 J/ m2 respectively. The dynamic tensile behavior of the C200 GRPC is also investigated through the split Hopkinson pressure bar (SHPB) according to the spalling phenomenon. The dynamic testing results demonstrate that strain rate has an important effect on the dynamic tensile behavior of GRPC. With the increase of strain rate, its peak stress and relevant strain increase. The GRPC exhibits an excellent strain ratio stiffening effect under the dynamic tensile load with high strain ratio, resulting in a significant change of the fracture pattern.

The role of forest culture in green construction and management of forest parks:merging knowledge-attitude-practice and theory of planned behavior

As a cultural concept refl ecting the relationship between humans and forests,forest culture plays an active role in sustainable forest management.Forest parks provide a wide range of ecosystem services essential for the sustainable development of society,and the relationships between forest culture,green construction and management of forest parks have practical signifi cance.This study aimed to understand the interaction and process of forest culture infl uencing green construction and management in forest parks with the models Knowledge-Attitude-Practice(KAP)and Theory of Planned Behavior(TPB)by proposing a theoretical model.Four hypotheses were tested using data collected from 193 forest park employees in Heilongjiang Province,China.Our results show that forest culture had a signifi cant infl uence on green construction and forest management.In addition,subjective norm and perceived behavioral control directly impacted behavior in green construction and management of the forest park,whereas attitude did not have an impact.Subjective norm had a direct eff ect on attitude.Results between constructs show that forest culture had an indirect eff ect on planning and construction,and on ecological and economic management.Consequently,it supported three of four hypotheses within the proposed model in determining the infl uence of forest culture on green construction and management.

A Review of Feeding Behavior, Growth, Reproduction and Aquaculture Site Selection for Green-Lipped Mussel, <i>Perna viridis</i>

Green-lipped mussel, Perna viridis is a warm water mussel species that is distributed widely in the Indo-Pacific regions. It is a commercially important species and has demonstrated a great culture potential in tropical countries. The feeding behavior of P. viridis is influenced by both seston concentration and its nutritional values. It is shown the mussels exhibit higher ingestion rate when the organic content of the seston is higher. Interestingly, several studies have reported that P. viridis can demonstrate selective feeding behavior towards phytoplankton. Short term studies have shown that the P. viridis exhibits preferentially ingestion of dinoflagellates, while long term studies show that the P. viridis has a higher growth rate during diatom blooms. Nevertheless, spawning of P. viridis is induced by high primary productivity at relatively high sea water temperature. In the temperate countries, spawning is seasonal but normally occurs in summer. In the tropical countries, however, the P. viridis has been shown to spawn all year-round with two peaks which coincide with monsoon seasons. The site selection is critically important when considering the green mussel culture. Feasibility study for P. viridis farming is normally carried out first in order to evaluate the environmental conditions of the site. This paper attempts to review the current knowledge of biology, selective feeding behaviour, growth, reproductive and the aquaculture site selection methods for green-lipped mussel.

GREEN'S FUNCTION AND THE POINTWISE BEHAVIORS OF THE VLASOV-POISSON-FOKKER-PLANCK SYSTEM

The pointwise space-time behaviors of the Green’s function and the global solution to the Vlasov-Poisson-Fokker-Planck(VPFP)system in three dimensional space are studied in this paper.It is shown that the Green’s function consists of the diffusion waves decaying exponentially in time but algebraically in space,and the singular kinetic waves which become smooth for all(t,x,v)when t>0.Furthermore,we establish the pointwise space-time behaviors of the global solution to the nonlinear VPFP system when the initial data is not necessarily smooth in terms of the Green’s function.

Spillover effects and incentive initiatives of green behavior

Spillover effects play a crucial role in hindering the effective implementation of green behavior.Whether it pertains to enterprises or individuals,engaging in green behavior often leads to increased costs.However,the benefits derived from green behavior cannot be fully recouped but rather spill over and benefit other non-green entities,thereby undermining the incentives for companies or individuals to engage in green practices.The study categorizes the spillover effects of corporate green investment into three aspects based on the channels through which they occur:environmental spillover,inter-industry spillover(vertical spillover),and intra-industry spillover(horizontal spillover).While these three spillover mechanisms work in tandem with green behavior,existing literature has predominantly focused on the "free-rider " effect of environmental spillover and horizontal spillover,neglecting the impact of vertical spillover.Additionally,this paper provides a comprehensive review of measures aimed at incentivizing corporate green investment.Current government-level measures often overlook the multifaceted nature of spillover effects stemming from green behavior and the factors influencing corporate decision-making in this regard,resulting in various limitations and deficiencies.The paper argues that,besides relying solely on direct interventions from external actors such as the government or society,a more significant emphasis should be placed on enhancing the role of enterprises as a fundamental approach.This involves fostering the endogenous capacity of enterprises to generate green investment and facilitating a beneficial interaction that respects corporate autonomy.Consequently,policymakers should consider multiple dimensions of spillover effects and design appropriate mechanisms that leverage the inherent capabilities of enterprises,thus stimulating green investment.This approach represents a crucial area for future research that warrants further in-depth inve stigation.

How Environmental Attitudes Affect Consumers’Willingness to Engage in Green Consumption Behaviors:The Moderating Role of“Plastic Restriction”

Consumers’willingness to engage in green consumption behavior will be guided by internal psychological factors and also influenced by external environmental factors.One of the most common external interventions is the issuance of scientific policies and regulations.The government may introduce policies and regulations that help to increase the willingness of green consumption behavior,such as energy-saving and emission reduction policies and policies to restrict plastic products.In this paper,the authors study the mechanism of the effect of environmental attitudes on consumers’willingness to engage in green consumption behavior from the perspective of“plastic restriction”,and conclude that the magnitude of the effect of policies and regulations on the willingness to engage in green consumption behavior varies significantly at different levels of environmental attitudes.This study provides scientific implementation ideas and targeted management suggestions for the government to formulate effective external intervention policies for green consumption.

Urban Green Space, Uneven Development and Accessibility: A Case of Dalian′s Xigang District

This study examines the socio-spatial context of uneven development and the residential accessibility of green space in Dalian of Liaoning Province, China. The social fairness was analyzed with a community scale as the basis. We combined social scientific methods with a GIS method using a behavior accessibility model from the perspectives of fairness of urban green space allocation based on social geography, geographic information science, management science and many other related discipline theories. The results show that: 1) Most of the urban green space distribution presents an unbalanced phenomenon, and it does not match with the population distribution; 2) We found some differences in the accessibility of the population with different attributes and opportunities to use and enjoy the urban green spaces, mainly due to: the dual social and spatial attributes of the residents and the serious stratum differentiation generated were the internal causes; the residential space differentiation and the pursuit of economic and real estate development were the direct causes; and unreasonable planning, in regard to the fact that government policies did not give consideration to efficiency and fairness, was also an important factor.

财政分权、地方政府行为与经济绿色转型

依据2009—2019年省级面板数据,运用空间计量模型和中介效应模型,考量财政分权对经济绿色转型的影响。结果显示:财政分权促进本地经济绿色转型作用显著,但会阻碍相邻地区经济绿色转型进程。地方政府行为在二者之间发挥着中介作用,财政分权主要通过促进地方政府合理竞争、提高地方政府财政科技投入强度促进经济绿色转型,提高财政分权程度会强化地方保护主义行为,但地方保护主义行为对经济绿色转型的影响不显著。

空气质量改善能缩小城乡居民消费差距吗?——兼论绿色发展对共同富裕的促进作用

厘清空气质量对城乡居民消费差距的影响作用,有助于理解中国式现代化进程中绿色发展与共同富裕目标的协同推进。从医疗和防御性支出、规避行为以及劳动生产率等视角阐释了空气质量影响城乡居民消费差距的理论机制,并使用2005—2020年中国省际面板数据对其影响作用进行了实证检验。研究发现:空气质量改善会显著缩小城乡居民消费差距,这一结论在使用逆温天数作为工具变量进行内生性处理,以及更换空气污染物指标、考虑空间自相关等方式进行稳健性检验后依然成立;该作用通过缩小城乡居民消费倾向差距以及城乡居民收入差距两条渠道产生;此外,空气质量对城乡居民消费差距的影响作用还存在空间溢出效应。研究结果表明,推动绿色发展改善空气质量,能够缩小城乡居民消费差距,从而助力共同富裕目标的实现。

价格补贴、征税与劝诫政策调节下的绿色消费行为影响机制研究

研究价格补贴、征税与劝诫3种不同政策工具在绿色素养、价值感知与绿色消费行为意愿之间的影响机制,对采取有效政策工具促进绿色消费行为具有重要价值。从理论与实证出发,探讨了绿色素养、价值感知与绿色消费行为意愿之间的关系,引入了价格补贴、征税与劝诫多种政策工具导向作为情景调节变量,并分析了其在上述关系之中的调节效应。结果表明:①消费者的绿色素养越高,越能正向促进绿色消费行为意愿;②绿色价值感知利得与绿色价值感知利失起并行中介作用,且消费者的绿色素养更能通过绿色价值感知利得正向促进绿色消费行为意愿;③3种政策导向工具都能正向调节绿色素养对绿色价值利得感知之间的关系。在对绿色素养对绿色价值利失感知之间的影响关系中,价格补贴性政策能够显著调节这一影响机制,征税型政策与劝诫型政策导向对这一影响机制调节效应不显著。同时,调节效应图分析显示,不同高低分组的价格补贴政策、征税与劝诫型政策导向对绿色素养对绿色消费行为意愿的调节也有一定的异质性。

控股股东私利行为、客户治理与企业绿色创新——基于中国上市公司的经验研究

以2012—2021年A股非金融上市公司为样本,理论分析与实证考察控股股东私利行为对企业绿色创新的影响以及关系客户对此的治理效应。研究结果表明,控股股东私利行为显著降低了企业绿色创新水平,而客户的治理能力能有效弱化控股股东私利行为对企业绿色创新的负面影响,揭示了客户治理效应的存在。基于影响机理的进一步分析发现,客户对控股股东私利行为的治理效应在低现金持有水平、过度投资企业中表现得更为显著。基于企业外部治理机制的进一步分析显示,在影响控股股东私利行为与企业绿色创新关系的过程中,客户治理与产品市场竞争治理、机构投资者持股治理之间存在显著的替代关系。对此,企业应建立健全内部治理与监督机制,加强客户资源管理。

配偶对员工绿色行为的影响:基于溢出-交叉模型的分析

如何激发员工绿色行为成为新时代学界和组织实践关切的议题。本研究基于溢出交叉理论(spillover-crossover model,SCM)框架,构建配偶与员工绿色行为关系的理论模型。采用动态追踪、滞后配对的方案获取80对双职工夫妻样本,结果显示:配偶绿色行为通过提升工作家庭人际资本化进而影响员工绿色行为;配偶绿色知识分享意愿和能力显著强化上述关系,分享意愿和能力水平越高,二者间关系越强。研究扩展了绿色行为研究范式,从家庭视角为组织绿色管理提供有益启示。

绿色金融政策、企业行为与中国工业非对称转型

新型工业化背景下,中国绿色金融政策的产业转型效应能否契合中国工业转型需求有待检验。以2015-2022年A股工业企业为样本,以中国绿色金融改革创新试验区试点政策为准自然实验,利用渐进双重差分法实证研究中国绿色金融政策的工业转型效应,并从微观企业行为层面分析其内在机制。研究发现绿色金融政策存在“非对称转型”效应,其总体上提高了污染行业的生产效率、降低了绿色行业的生产效率。进而利用动态分析方法进行机制检验发现,对于污染行业,绿色金融政策倒逼企业优化要素配置效率但抑制了企业创新行为,导致生产效率短期提升明显但长期增长动力不足;对于绿色行业,绿色金融政策明显激励了企业创新投入,但抑制了企业要素配置优化行为,导致生产效率短暂下降,但在较长时间窗口内稳步提升。进一步研究发现,与排污收费政策和研发补贴政策搭配使用能够削弱绿色金融政策对污染行业的创新抑制效应、提高绿色行业的要素配置效率,从而缓解绿色金融政策的“非对称转型”效应,促进中国工业整体生产效率在短期和中长期内均衡提升。

企业社会责任感知对工作场所绿色行为的影响机制研究

目前企业CSR的研究呈现从宏观领域向员工个体感知等微观领域推进的趋势。采用问卷调查,共收集219份有效问卷。分析发现:员工社会CSR感知和环境CSR感知越匹配,员工的工作场所绿色行为水平越高;工作意义起到中介作用,员工绿色价值观发挥调节机制。研究结论有望为企业绿色发展背景下的CSR实践提供参考作用。

LED绿光在雏鹅高密度养殖模式中的调控作用

为探究两阶段LED绿光在雏鹅高密度饲养模式中的调控作用,确定适宜的光照方案。该研究基于生产实际,采用双因素试验设计(孵化光照×育雏光照),设置黑暗和绿光2种孵化光照,白光和绿光2种育雏光照,分析高密度饲养模式下孵化期和育雏期LED绿光照射对14 d雏鹅生长性能、肠道发育、血液激素、羽毛质量及啄羽行为的影响。结果表明,育雏期提供LED绿光能显著增加14 d雏鹅体质量、1~14 d日均体质量增量、日均采食量(P<0.05)并降低料重比(P<0.05),显著降低血液中五羟色胺、皮质酮含量及十二指肠隐窝深度(P<0.05),显著增加雏鹅胸腹部羽毛长度(P<0.05)、降低雏鹅背部裸露评分(P<0.01)及减少啄羽行为(P<0.001);种蛋绿光孵化可显著减少子代雏鹅啄羽时间和次数(P<0.05);而孵化光照和育雏光照在影响雏鹅各指标上无显著交互作用(P>0.05)。该研究证实了两阶段LED绿光对雏鹅高密度饲养模式中负面效应的正面调控作用,且育雏期提供绿光效果更好,可为鹅高效生产提供理论依据。

创新视角下碳市场推动经济体绿色转型的微观机理

绿色创新是脱碳之源,亦是实现“双碳”目标的根本途径,但市场失灵常常导致其供给不足,需要宏观政策给予必要的引导。那么,碳市场政策能否有效推动经济体绿色创新体系建设?循理方能事成,该研究从企业投资视角构建碳市场推动经济体低碳创新微观驱动和绿色转型宏观演变的理论分析框架。为验证碳市场下企业早期投资行为的动态特征,作者基于中国2000—2019年A股上市公司面板数据,建立一阶差分广义矩估计模型进行实证分析,结论如下:①碳市场政策信息显著促进了企业早期投资结构的动态调整,持续推动企业生产设备绿色升级和生产工艺绿色创新,是经济体绿色创新体系建设的有力支撑。②碳市场对企业投资调整和绿色创新的引导路径存在行业间差异,低隐含碳服务行业致力于生产设备升级,高隐含碳生产行业则倾向于产品创新。③区域经济发展水平和绿色税收优惠政策显著影响碳市场下的企业绿色创新投资决策。④在碳市场下,企业绿色技术创新水平的提升对于其他类型创新不存在挤出效应,且对经济体综合创新发展存在正向激励。据此,应稳步推进全国统一碳市场的建设和运行,因地制宜、因势利导地完善“碳市场推动中国经济体绿色技术创新体系建设”的协同、配套政策,助力碳市场成为促进企业绿色技术创新、推动经济体绿色转型、实现高质量碳达峰和如期碳中和的长效机制。

绿色变革型领导对员工自愿绿色行为的影响:自然情感联结与权力距离取向的作用

基于情感事件理论,探究绿色变革型领导对员工自愿绿色行为的影响机制。本研究分三个时点搜集了83个团队305份领导-员工配对数据,并进行多层次分析。结果表明:绿色变革型领导正向预测员工自愿绿色行为,员工自然情感联结在上述关系中发挥中介作用。此外,员工的权力距离取向正向调节绿色变革型领导与员工自然情感联结的关系,以及绿色变革型领导经由自然情感联结对员工自愿绿色行为的积极作用。本研究拓展了学界对员工自愿绿色行为激发因素的认识,同时为企业的绿色管理实践提供了新启示。

如何打通绿色购买决策的“最后一公里”——绿色购买意向-行为转化机制分析

绿色购买是绿色消费中的重要环节,然而消费者“想而不买”可能会制约绿色消费市场的发展。目前,绿色购买行为转化的内在机理探索尚处在起步阶段,鲜有将外部购物情境与消费者内在特质结合考量的绿色购买决策研究。本研究从消费者购买绿色标签产品的临场决策情境出发,以计划行为理论和行动阶段理论为理论基础,结合节约认知努力的观点视角,探究绿色购买意向-行为之间的转化机制。研究结果表明:绿色购买意向对绿色购买行为有显著的直接影响;感知行为控制、绿色购买执行意向在绿色购买意向和行为之间具有双重、链式中介作用;节约认知努力对“绿色购买意向-感知行为控制-绿色购买执行意向-绿色购买行为”链式中介作用具有负向调节作用。相关结论拓展了计划行为理论中绿色购买的意向-行为转化机制,为绿色营销的管理实践提供了建议。

考虑风险规避的绿色供应链融资决策

针对绿色供应链下小微制造企业融资难等问题,构建由单个制造商和零售商组成的二级绿色供应链博弈模型。在制造商不考虑融资进行绿色生产的基础上,引入银行融资、零售商融资和风险规避行为,分析当供不应求或需求突然增加而产能不足时,零售商是否为制造商提供融资以扩大产量的问题,给出不同融资策略下制造商和零售商的最优决策。结果显示:在绿色供应链中,增加产品绿色度可以提高制造商和零售商的利润。对于制造商来说,采用任何融资方式都能够缓解资金压力,但当零售商风险规避程度较小时,应选择向零售商融资;当零售商风险规避程度较大时,应选择向银行融资。当零售商为上游制造商提供融资时,双方的利润水平都可以得到有效提升。因此,零售商可以设定合理的融资利率,为制造商提供金融帮助,并多方位评估制造商的生产经营能力,选择合适的方式规避制造商产量不足所带来的风险,降低自身损失。同时,鼓励制造商进行绿色技术创新、生产绿色度更高的产品,从而提高市场竞争力。

基于VOSviewer的企业绿色专利行为研究现状

随着国家对绿色创新发展的愈发重视,企业绿色专利行为也受到了学界更多的关注。从供给侧和需求侧的角度出发,将企业绿色专利行为划分为生产行为与消费行为进行概念分析,并运用VOSviewer软件筛选了国内知网数据库相关文献进行可视化计量研究。结果表明,当前企业绿色专利生产行为是学界研究的热点,且呈现高速发展的趋势,研究热点主要围绕内外部的影响因素展开,如环境规制、融资约束、绿色金融、数字化等,但学者间的合作较少;对企业绿色专利消费行为的研究则处于缓慢起步阶段,学界关注度极低,研究层次少,主要围绕绿色技术转移、绿色专利交易等展开。鉴于此,未来应加强对企业绿色专利行为的综合研究,加大对绿色专利再配置与绿色专利交易市场的相关讨论。