工程建设项目招标范围和规模标准规定

第一条为了确定必须进行招标的工程建设项目的具体范围和规模标准,规范招标投标活动,根据《中华人民共和国招标投标法》第三条的规定,制定本规定。第二条关系社会公共利益、公众安全的基础设施项目的范围包括:

赣南上犹营前大型客家民间灯彩艺术——“九狮拜象”

"九狮拜象"是上犹县营前镇所特有的一种大型客家民间灯彩艺术,其形成前后共经历了两三百年的历史。"九狮拜象"这一灯彩艺术在功能、规模和制作工艺上有其发展变化的一个过程,在乐器配置及曲牌使用上形成了自己的一套体系。

Large Scale VLSI Module Placement Using LFF Heuristics by Stages

We present a deterministic algorithm for large-scale VLSI module placement. Following the less flexibility first （LFF） principle,we simulate a manual packing process in which the concept of placement by stages is introduced to reduce the overall evaluation complexity. The complexity of the proposed algorithm is （N1 ＋ N2 ） × O（ n^2 ） ＋ N3× O（n^4lgn） ,where N1, N2 ,and N3 denote the number of modules in each stage, N1 ＋ N2 ＋ N3 = n, and N3〈〈 n. This complexity is much less than the original time complexity of O（n^5lgn）. Experimental results indicate that this approach is quite promising.

Bulk and bubble-scale experimental studies of influence of nanoparticles on foam stability

Influence of silicon oxide(SiO_2) and aluminum oxide(Al_2O_3) nanoparticles on the stability of nanoparticles and sodium dodecyl sulfate(SDS) mixed solution foams was studied at bulk and bubble-scale. Foam apparent viscosity was also determined in Hele-Shaw cell In order to investigate the foam performance at static and dynamic conditions. Results show that the maximum adsorption of surfactant on the nanoparticles occurs at 3 wt% surfactant concentration. Foam stability increases while the foamability decreases with the increasing nanoparticle concentration. However, optimum nanoparticle concentration corresponding to maximum foam stability was obtained at 1.0 wt% nanoparticle concentration for the hydrophilic SiO_2/SDS and Al_2O_3/SDS foams. Foam performance was enhanced with increasing nanoparticles hydrophobicity. Air-foams were generally more stable than CO_2 foams.Foam apparent viscosity increased in the presence of nanoparticles from 20.34 mPa·s to 84.84 mPa·s while the film thickness increased from 27.5 μm to 136 μm. This study suggests that the static and dynamic stability of conventional foams could be improved with addition of appropriate concentration of nanoparticles into the surfactant solution. The nanoparticles improve foam stability by their adsorption and aggregation at the foam lamellae to increase film thickness and dilational viscoelasticity. This prevents liquid drainage and film thinning and improves foam stability both at the bulk and bubble scale.

寻找新动力 创造新供给 谋求新发展—中招协2016年会员单位交流研讨会综述

11月25日,中国招标投标协会2016年会员单位交流研讨会在广东汕头召开。国家发展改革委国民经济综合司总量处副处长丁琳、固定资产投资司投融资处李泽正和法规司法规一处徐致远出席会议并介绍有关情况。中国招标投标协会会长任珑出席会议并向与会代表介绍了中招协2016年开展的重点工作和2017年工作的初步考虑。

Robust linear optimization under matrix completion

Linear programming models have been widely used in input-output analysis for analyzing the interdependence of industries in economics and in environmental science.In these applications,some of the entries of the coefficient matrix cannot be measured physically or there exists sampling errors.However,the coefficient matrix can often be low-rank.We characterize the robust counterpart of these types of linear programming problems with uncertainty set described by the nuclear norm.Simulations for the input-output analysis show that the new paradigm can be helpful.