倒边盖挖逆作法基坑支护结构可靠性分析

为了解决采用标准Monte Carlo法计算复杂基坑工程上常见小概率失效,导致计算效率低的问题,以南京市湖南路地下商业街工程为工程背景,首先,将随机响应面法与基坑工程三维模型相结合,求解极限功能函数的响应面方程,并用标准Monte Carlo法计算失效概率和可靠指标,探讨采用倒边盖挖逆作法作为基坑支护结构施工方法的可行性;其次,基于该响应面方程,以土体的弹性模量为随机变量参数,采用马尔可夫链蒙特卡罗子集模拟法(MCMC子集模拟法)计算基坑支护结构的失效概率,并与标准Monte Carlo法结果进行对比分析。结果表明：当支护结构最大侧移控制指标为25 mm时,计算得到的可靠指标均大于4.6,即采用倒边盖挖逆作法施工过程中基坑是安全的;10万次和50万次标准Monte Carlo法计算得到的失效概率均为零,说明对于标准Monte Carlo法,在计算小概率失效问题时10万与50万的样本量是不足的;而MCMC子集模拟法用2.98万个样本计算出的结果与标准Monte Carlo法采用100万个样本计算的结果相对误差仅为1.7%,表明MCMC子集模拟法对于小概率失效问题求解的优势。所提算法在一定...     

福建省服务业FDI对服务贸易影响的实证研究

通过构建VAR模型,并运用协整检验、脉冲响应函数与方差分解等分析方法,对福建省2000-2012年服务业实际利用FDI与服务贸易之间的长期动态关系进行了实证研究.结果显示:在短期内,服务业FDI与服务出口存在互补关系,与服务进口存在替代关系;长期来看,服务业FDI与服务进出口的关系不稳定.最后根据结论给出一些政策建议.     

新阶段中国商品对俄出口研究

中国俄罗斯年开启了中俄交流的大幕。在这个时期,中国加大商品出口,平衡对俄贸易逆差已不容忽视。中国商品在俄罗斯市场具有明显的竞争优势,应借助俄罗斯中国年活动平台,促进相互了解和发展,优化产品出口结构,进一步开拓俄罗斯市场。     

National response strategies and marketing innovations during the COVID-19 pandemic

During the COVID-19 pandemic, different nations have adopted a variety of response strategies to fight and contain the new coronavirus. Such national response strategies can be classified into three categories based on their underlying philosophy: strict control with unlimited resources, relentless contribution with limited resources, and rough rationality with limited resources. We discuss the philosophies, characteristics, and performances of the three response strategies and when they should be adopted. We also examine what marketing innovation strategies enterprises should adopt to survive and grow their businesses in both the short and long term. This study provides important strategic implications for national policymakers and enterprises on the use of response strategies as well as marketing innovation tactics and strategies to be used both during and after the pandemic.     

CPR核电站应急柴油发电机组安装

本文介绍了岭澳核电二期应急柴油发电机组的安装技术。该安装技术在实际工程中是切实可行的，并可作为其它CPR核电站应急柴油发电机组安装的参考。     

浅析网络政治动员

网络政治动员对国家政治安全具有双重影响,因此,我们要畅通网络政治参与渠道,加强对网络信息的监控和管理,发挥网络政治动员的正面作用。     

工作场所越轨行为的形态、员工反应与组织对策

工作场所越轨行为是指组织成员有意采取的针对其他组织成员或组织财物的违反组织重要主流规范的行为。本文旨在探讨当前工作场所越轨行为的形态特征、员工的反应以及工作场所越轨行为与组织对策间的关系。通过对580名员工的问卷调查,研究发现:(1)生产型过失、损公肥私与合作破坏行为是最常见的工作场所越轨行为类型;(2)员工最不能容忍的是违法行为与合作破坏行为;(3)视情形而定与沉默是员工较可能采取的对工作场所越轨行为的反应方式;(4)曝光与存档有利于防控生产型过失、损公肥私与合作破坏行为,定向引导有助于防控违法行为。     

Marketing Relationship Management: Antecedents to Survival and Dissolution

ABSTRACT

Though investing in relationships in order to continue them seems intuitive, is every relationship worth further investment? For those partnerships in unstable conditions, it is important to know which ones are headed for dissolution and which ones have the potential to survive.

In addition to assessing the economic value of continuing a partnership, this paper argues that the behavioral quality of a relationship should also be considered if relationship management is to be successful. A Partnership Survival Framework (PSF) is offered, wherein conflict response behaviors are shown to be predictive of not only survival but also the quality of a relationship. Here, the PSF is proposed and tested. Support is found for the framework and theoretical and managerial implications are discussed.     

Local interests or centralized targets? How China’s local government implements the farmland policy of Requisition–Compensation Balance

The Requisition–Compensation Balance of Farmland (RCBF) is a strict policy in China aimed at controlling farmland conversion and replenishing farmland loss caused by urban expansion through a set of top-down quotas. These conflict with local interests, since land conversion from agriculture to construction is a key tool by which local governments attract investment and raise fiscal revenue. How should local authorities respond to this centralized policy? This paper presents a framework “quantity–quality–productivity–environment” to investigate local governments’ coping strategy and the holistic performance of the RCBF. The empirical study indicated that local jurisdictions placed economic and financial growth first and continued expropriating farmland on a large-scale, including land of high quality, for development. However, impelled by compulsory quotas and supervision from governments at higher levels, local authorities would partly replenish the quantity loss through farmland exploitation, regardless of the quality of the new cropland and the possible environmental impact. Consequently, fast requisition and unqualified compensation undermined the capacity of regional agricultural output. We suggest that the RCBF is not capable of guaranteeing food security, whilst farmland supplementation threatens the local environment.     

Understanding Equity in the Recreation User Fee Context

Equity is a major public concern related to recreation fees on public lands. The purpose of this study was to test a three-dimensional model of equity and to examine the perceptions of equity across demographic segments. Data were collected by a telephone survey with residents (N = 366) of two western states. Confirmatory factor analysis supported the three-dimensional equity model in a recreation fee context. People tended to support democratic equity more than compensatory equity. Greater support was shown for discounted fees for the elderly and persons with disabilities than for discounts for ethnic minorities, low income people, or large families, suggesting the possibility of two sub-dimensions of the compensatory equity construct. Overall, the results do not support that disadvantaged groups seek discounted fees.