浅谈工程总承包项目的合同管理

本文从加强项目前期工作、提高管理人员素质、搞好三大控制、发挥项目经理的作用和计算机的应用等方面,论述了工程总承包项目的合同管理。     

五环工程新签50/80项目EP合同

2010年11月13日上午,由中国五环工程有限公司承担设计采购EP总承包的内蒙古博大实地化学有限公司50／80项目合同签字仪式在内蒙古鄂尔多斯市隆重举行。根据合同约定,中国五环工程有限公司将承担50万L／a合成氨装置、80万t/a尿素装置以及辅助设施和公用工程的设计和采购工作,项目计划于2013年8月底实现机械竣工。     

光敏树脂3D打印适用性的流变学表征方法

通过旋转流变仪联用自制的光固化装置,在光固化过程中采用动态流变测试的时间扫描模式研究液态光敏树脂光固化特性,在光固化前采用稳态流动测试和动态频率扫描探测树脂的流动特性,在光固化后采用动态应力扫描原位分析成型材料的力学性能.结果表明,树脂光固化前的黏度约为0.5 Pa·s,流动性较好;光固化中树脂固化需要的紫外光照射时长...     

气田加热炉适用性分析

伴随气田开发,天然气的换热与集气站设备伴热等工艺,对天然气地面集输显得尤为重要。采气分公司第二作业区拥有两类加热炉以保证天然气的换热,经实际生产发现两类加热炉均存在使用问题。本文对加热炉在实际生产中的优缺点进行分析,延长加热炉使用年限,达到节约经费的效益,使加热炉高效、稳定、安全的为气田服务。     

从南海工程看涉外工程投标报价及合同管理

总结我公司在2003年参与的年产80万t乙烯的CSPC南海项目的投标报价及合同管理中的经验与教训。     

浅析新形势下工程招投标与合同管理

长久以来,工程投标和招标都是工程承包的主要方式,而工程投招标的顺利进行离不开良好的合同管理。如今,社会环境和市场经济一直在不断变化和发展,给建筑市场带来了不少新的挑战,分析出新形势下工程投招标与合同管理存在的问题并提出相应对策与建议有助于应对这些新的挑战,从而使当今的建筑市场朝着更加繁荣的方向前进。     

对外EPC工程总承包合同风险防范分析

本文简要论述了EPC工程总承包合同的范畴,通过项目实施的保险准备、保函、贸易方式及结算等对总承包方需要防范风险做简要的介绍。     

国际工程EPC项目的合同管理

通过论述国际工程EPC合同管理的主要方面,彰显合同管理在EPC项目中的重要性,提出了国际工程EPC承包商应该重视合同管理职能、明确合同管理部门和组织设置、制定完善的合同管理工作程序以及在项目管理中确定合同管理重点工作,得出中国的工程公司只有通过加强合同管理,提高EPC总承包项目管理水平,才能真正和国际先进管理水平接轨,...     

合理规避建安工程合同营业税的问题

本文概述了建安工程的合同特点以及相关税务规定,通过重点分析财税[2003]16号文件“建筑安装工程的计税营业额不应包括设备价值”的这一政策,得出建筑安装业如能充分掌握行业相关税务政策,并合理应用,正确的规避建安工程合同营业税,可以有效的减少工程建设投资的税务成本,或可减少施工企业的税务支出,实现其利润最大化,提高企业的竞争力。     

新形势下工程招投标与合同管理分析

在法制建设的开展和社会主义市场经济的进一步规范的新形势下,在工程招标、投标和合同签订的过程中由于缺乏法制意识和法律知识,企业将面对着违反法律法规、损害企业利益的风险。本文在分析目前工程招标、投标和合同签订的实际情况的基础上,探讨对工程招标、投标和合同管理的进一步规范。     

On the applicability of modified dischinger equations

The article demonstrates that the concept of separating the reversible creep part from the creep function of concrete is very useful, theoretically as well as practically. The demonstration is carried out indirectly by using the concept in developing a new method of analysis, the results of which are successfully compared with experimental data. Contrary to some other methods an analytical conversion is possible between the three principal forms of the stress-strain relation. By simplifying the method the simple Improved Dischinger equation — previously developed by the author — is derived. It is shown that also the Improved Dischinger equation agress well with experimental results — except (as expected) for some time (approx. 2 months) after large load jumps. Thus the two Modified Dischinger methods represent two levels of accuracy and mathematical complexity.     

On the applicability of the Lennard-Jones potential function to amorphous high polymers

Pressure-volume-temperature measurements were performed on five amorphous thermoplastics. From these data, first derivatives of internal energy with respect to volume were calculated. These derivatives were cast into the Lennard-Jones form and the two defining parameters were evaluated for each polymer. It was found that, when the polymer is in the glassy state, these parameters correspond to the volume and internal energy of the polymer at absolute zero. For melts, the first derivatives are constant within the accuracy of these experiments regardless of temperature, pressure, or volume. As a result, the Lennard-Jones potential was found to be a good model for the amorphous glassy state and inappropriate above T_g. © 1993 John Wiley & Sons, Inc.     

制造电子产品用的生物基复合材料

日本电子集团NEC公司开发了利用生物基塑料聚乳酸(PLA)加工的新型复合材料,应用领域包括制造手机外壳等电子部件产品。NEC公司称,PLA-碳纤维复合材料与不锈钢相比,有较高的导热性能。应用作电子产品外壳,     

On the solution and applicability of bivariate population balance equations for mixing in particle phase

New benchmarks are used to test two classes of discretization methods available in the literature to solve bivariate population balance equations (2-d PBEs), and the applicability of these mean-field equations to finite size systems. The new benchmarks, different from the extensions of their 1-d counterparts, relate to prediction of kinetics of mixing in particle phase under: (i) pure aggregation of particles, called aggregative mixing, and (ii) simultaneous breakup and coalescence of drops. The discretization methods for 2-d PBEs, derived from the widely used 1-d solution methods, are first classified into two classes. We choose one representative method from each class. The results show that the extensions based on minimum consistency of discretization perform quite well with respect to both the new and the old benchmarks, in comparison with the geometrical extensions of 1-d methods. We next revisit aggregative mixing using Monte-Carlo simulations. The simulations show that (i) the time variation of the extent of mixing in finite size systems has power law scaling with the system size, and (ii) the mean-field PBEs fail to capture the evolution of mixing for reduced population of particles at long times. The sum kernel limits the applicability of PBEs to substantially larger particle populations than that seen for the constant kernel. Interestingly, these populations are orders of magnitude larger than those at which the PBEs fail to capture the evolution of total particle population correctly.     

NEC新型激光头支持HD DVD、DVD和CD

2003年11月4日～7日于奈良举行的光盘国际会议“ISOM‘03”上,NEC发表了有关兼容激光头—以蓝紫色激光为光源的下一代光盘“HD DVD”激光头的演讲,该激光头同时支持现行DVD和CD。演讲中,NEC展示了这种支持3种光盘的新型激光头。 DVD及DVD的光学部分为无限远修正(USI:Universal Infinity System)设计,通过加工有衍射光栅(Diffraction Grating)的物镜进行球面像差修正。这时,蓝紫色激光使用2次衍射光、红色激光使用