中国的酒税应该更高点吗?

《经济学人》杂志最近一篇讨论中国酒类消费增长的文章指出:中国的酒税比大多数国家要低。言下之意是提高酒税将会显著减少酒类消费。但真的会是这样的吗?在回答这个问题之前,我们不妨先问问政府为什么要对酒类征税。这主要有两个原因。第一,与征收其他税种一样,政府希望开源增收来维持其运转;第二,政府可能希望人们减少对某种产品的消费,故设法使其变得更加昂贵。第二个原因是《经济学人》杂志文中所考虑到     

Promote Competitive Neutrality to Facilitate China’s Economic Development:Outlook,Policy Simulations,and Reform Implementation-A Summary of the Annual SUFE Macroeconomic Report(2019-2020)

Twenty nineteen(2019)marked another year of lethargic growth in the Chinese economy amidst escalated internal and external complexities.Internally,the country's macroeconomic landscape was overcast continuously by fallen consumption growth,plunged growth in manufacturing investment,rapid accumulation of household debt,risen income inequality,and the overhang of local government debt.The nation's external conditions did not fare any better,with drastically declined growth in imports and exports,continued trade tensions with the US,and weakened external demand.Based on the IAR-CMM model,which takes account of both cyclical and secular factors,the baseline real GDP growth rate is projected to be 6.0%in 2020(5.9%using more reliable rather than the official data),with a downside risk.Alternative scenario analyses and policy simulations are conducted,in addition to the benchmark forecast,to reflect the influences of various internal and external uncertainties.The findings emanated from these analyses lead us to stress the importance and urgency of deepening reform to achieve competitive neutrality for China’s transformation into a phase with sustainable and high-quality development.     

水泥土复合管桩浅析

水泥土复合管桩是由高喷搅拌法形成的水泥土桩与同心植入的预应力管桩复合形成的获得国家专利的新型复合桩型.水泥土复合管桩不仅桩身材料强度高,还兼有侧阻力大的优点.既可作为基桩使用,也可将其用于复合地基.水泥土复合管桩充分利用原土,且施工时无噪音和污染,经济、环保,适用于粉土、粘性土、素填土、砂土等土层,特别适合软土地基.相比起纯粹的水泥土桩和预应力管桩,适用范围更广,发展前景更广阔,属于绿色建筑基础.     

百口泉71井区储层保护技术研究应用

通过室内实验研究,明确储层特征及敏感性情况,系统分析了储层损害机理,并结合超前注水,研究制定出"先期防膨、早期分注"与"控制注水强度、保持注采平衡"对策措施,形成了先期分层、梯度式防膨与后期注水过程中段塞脉冲式防膨相结合的工艺技术,确定了合理的注入压力和注入量等参数。投入现场实施后效果显著,百71井区白碱滩组油藏注入压力保持稳定,吸水状况良好,动用程度良好。     

天空还会变蓝吗

英国广播公司(BBC)有时将自己描述为"世界领先的公共新闻服务",其喜欢给人的印象是,拥有训练有素的记者,用进步的观点报道这个地球村上正在发生的所有事情。然而,伴随着这些日子英国大部分的"服务",BBC面临着严重的资金短缺,那些拥有遍布全球的专业记者的日子早已不复存在。通常是,一旦一条消息出现,他们会立即在网上询问周围认识的人:"你在X吗?看到什么冲突了没有?能发照片吗?"这样得到消息会更快捷和更便宜。当然,这样的方式也会有不     

美国银行业离岸服务外包分析

考察美国银行业离岸服务外包市场,有助于洞察全球金融业服务外包的发展趋势。本文分析了美国银行业服务外包市场的现状、外包业务范围的延伸、业务动机和模式的扩展以及规范美国银行离岸外包活动的法规和指引。指出业务全流程外包,加强对离岸服务提供商的监控,综合考虑成本、服务质量、效率和增值效应的外包战略,外包市场的进一步细分等将是美国银行业离岸服务外包的发展趋势。     

SEMI-ADAPTIVE GRID METHOD FOR CONVECTION-DOMINATED FLOW

A simple and efficient adaptive grid method (so-called "semi-adaptive grid method" ,SAGM) is presented in the paper. An obvious speciality of this method is that all computations are carried out on the physical plane. This semi-adaptive grid method has been successfully applied to solve the problems of steady and unsteady convection-diffusion equations with convection-dominated. A various examples have been tested. The numerical results show that numerical solutions are monotonic (near boundary or shock layer). The accuracy is higher than that on the uniform meshes.     

APPLICATION OF A NOVEL ALGORITHM FOR MOVING SURFACE FLOWS

Purpose:To demonstrate a novel algorithm for simulating moving surface flows. Methods: A fully conservative control volume method, on an adaptive Eulerian grid, has been developed to guarantee that the "kinematic free surface condition "is automatically satisfied by solving the mass and momentum conservation equations. No separate free surface tracing equation is needed. The basic idea has been extended to solve general moving surface problems by adding "boundary-node-constraints" to the solution equation set. Results; Two application problems, a critical free surface flow over an obstruction and flow past a 2-D inflated building, were predicted by the proposed method. The predicted results were in good agreement with the corresponding experimental findings. Conclusions: The proposed moving surface model permits prescribed moving walls, free surfaces, and compliant surfaces to be simulated by the same computer code. The moving surface shape is obtained as part of the solution of the conservation equation     

老挝南涅河一级水电站的设计与施工

南涅河一级水电站是老挝政府的优先建设项目,主坝为老挝最高碾压混凝土坝,2015年开工建设,计划于2018年建成蓄水。竣工后该项目将为老挝带来巨大的经济效益,特别是在加快波里坎赛省社会经济发展方面。回顾了该项目设计、施工情况以及所取得的成就,介绍了施工中采用的一些创新技术。     

美国奥罗维尔大坝溢洪道事故及处置

2017年初的风暴袭击了美国加利福尼亚州,对境内陈旧的基础设施造成了不同程度的破坏。其中,奥罗维尔大坝遭受严重损毁,溢洪道被冲垮,大量洪水溢出,坝基与边坡遭到冲刷,冲刷物碎片阻塞下游河道,导致发电站停机,对下游民众的生命和财产安全造成了严重威胁,因此,该州政府宣布进入紧急状态。记录了灾害发生的全过程以及相关部门的应对措施。灾后,加州州长宣布了若干加强防洪安全的举措。