《德意志意识形态》的城市思想及其现代意义

马克思、恩格斯的《德意志意识形态》集中论述了城市的起源、功能和演变过程,说明了城乡的分离和对立是人类文明演进的必经阶段,资本是改造和再造城市空间的内在动力.这些宝贵思想为我们化解城乡矛盾、解决空间正义问题提供了钥匙.     

杜84块超稠油成本管理方法研究

企业成本管理是指企业生产经营过程中各项成本核算、成本分析、成本决策和成本控制等一系列科学管理行为的总称。文中通过对超稠油成本构成的分析,找出控制成本的重点和难点,充分动员和组织企业全体人员,对企业生产经营过程的各个环节进行科学合理的管理,挖掘可变成本,提出降低成本的方法和途径,实现经济效益最大化,同时为超稠油油藏实现油藏经营管理提供了一定的参考。     

An improved portfolio optimization model for oil and gas investment selection

For oil company decision-makers,the principal concern is how to allocate their limited resources into the most valuable opportunities.Recently a new management philosophy,＂Beyond NPV＂,has received more and more international attention.Economists and senior executives are seeking effective alternative analysis approaches for traditional technical and economic evaluation methods.The improved portfolio optimization model presented in this article represents an applicable technique beyond NPV for doing capital budgeting.In this proposed model,not only can oil company executives achieve trade-offs between returns and risks to their risk tolerance,but they can also employ an ＂operational premium＂ to distinguish their ability to improve the performance of the underlying projects.A simulation study based on 19 overseas upstream assets owned by a large oil company in China is conducted to compare optimized utility with non-optimized utility.The simulation results show that the petroleum optimization model including ＂operational premium＂ is more in line with the rational investors＇ demand.     

鄂尔多斯盆地西南部延长组 过剩压力与油藏的关系

鄂尔多斯盆地西南部长8油藏的发现,揭示出盆地长8具有形成大中型油田的地质条件。从流体运移 的角度,应用平衡深度法原理,计算出过剩压力,建立了研究区的过剩压力体系,分析产生过剩压力的地质条件 及控制因素,认为长7段的过剩压力是油气初次运移的主要动力,并根据不同层段之间过剩压力差值,预测出有 利目标区,为寻找类似油田提供了理论依据。     

A comparison of neural network and multiple regression analysis in modeling capital structure

Empirical studies of the variation in debt ratios across firms have used statistical models singularly to analyze the important determinants of capital structure. Researchers, however, rarely employ non-linear models to examine the determinants and make little effort to identify a superior prediction model. This study adopts multiple linear regressions and artificial neural networks (ANN) models with seven explanatory variables of corporation’s feature and three external macro-economic control variables to analyze the important determinants of capital structures of the high-tech and traditional industries in Taiwan, respectively. Results of this study show that the determinants of capital structure are different in both industries. The major different determinants are business-risk and growth opportunities. Based on the values of RMSE, the ANN models achieve a better fit and forecast than the regression models for debt ratio, and ANNs are cable of catching sophisticated non-linear integrating effects in both industries. It seems that the relationships between debt ratio and independent variables are not linear. Managers can apply these results for their dynamic adjustment of capital structure in achieving optimality and maximizing firm’s value.     

武钢高炉喷煤经济效益浅析

高炉喷煤的经济效益与保本置换比和实际置换比有关，为提高经济效益，应降低保本转换比与提高实际转换比。     

浅析企业资本结构

国有企业资产负债率不断上升,企业自有资本在资本结构中所处的比重不断下降,这既加大了企业经营风险,又严重影响了企业的发展。对影响资本结构的因素及如何优化资本结构进行阐述。     

含多正弦扰动的航天器无拖曳控制系统性能极限研究

本文研究了航天器无拖曳控制系统的性能极限问题.将空间环境扰动描述为一个阶跃分量、一个平稳随机分量和多个正弦分量的线性组合,利用残余非保守力的稳态方差度量扰动抑制性能,并运用Wiener-Hopf设计方法求解最小灵敏度函数.为确保残余非保守力的渐近平稳性,将最小灵敏度函数表示为反馈系统的频域拓扑结构,并推导了闭环系统的极限指标.结合无拖曳控制指标,讨论了加速度计模式下的传感器、执行器的指标分解问题.     

浅论管理局资金紧张的原因及解决对策

影响管理局资金紧张的原因有三点:一是受企业自身管理和经营的影响;二是受市场环境的影响;三是受政策方面的影响。针对上述原因提出解决对策:1、严格奖惩,层层传递压力,确保资金回笼;2、盘活存量资金,加强集中管理,不断提高资金使用效率;3、优化筹资理财,精心运作,切实降低资金成本;4、加强沟通,积极反映情况,努力争取集团公司的政策支持。     

浅谈江汉采油厂货币资金的内部控制

货币资金是单位流动性最强、控制风险最高的资产,是单位生存与发展的基础,必须加强对单位货币资金的管理与控制。阐述了货币资金内部控制的意义及目标,分析了江汉采油厂货币资金内部控制的现状,提出了加强江汉采油厂货币资金内部控制的对策。