政府建设项目集中管理模式下的全过程造价管理研究——以深圳市龙岗区建筑工务局为例

政府建设项目集中管理模式下是非经营性政府项目常采用的方式,该模式下存在多层委托代理关系,处于核心地位的代建人在整个建设过程中造价控制发挥着巨大作用。文章以龙岗区建设工务局为例阐述了政府建设项目集中管理模式下的代建人全过程造价控制中的工作重点,以及各部门间的分工协作问题。     

基于最大隶属度的目标识别

对地空导弹将要拦截的目标进行识别,其主要思想是在综合多个因素的基础上给出待识别目标相对于已有目标集中各目标的隶属程度,通过隶属度排序,决定目标的种类,以便于为防空作战决策提供科学依据.最后通过实例说明该模型的合理性和有效性.     

组建高效的教学局域网

介绍了高效的教学局域网的硬件配置和网络拓扑结构，软件的安装和设置，以及网络的功能介绍。     

X—ray Peak—Shift Determination of Deformation Fault Probability in Fe—Mn—Si Alloys

The X-ray diffraction peak-shift method was introduced into the determination of deformation fault probability (α) of Fe-Mn-Si alloys with various Mn contents and thermomechanical cycling numbers.The precise lattice constants required were obtained by numerical calculation instead of using standard sample without any fault.The influence of internal stress on the determined α has been evaluated,and the caused relative error was determined as about 4% and thus negligible.The results show that the deformation fault probability increases with decreasing Mn-content and increasing cycle number,which are qualitatively consistent with those results of Psf determined by peak-broadening method.     

学术社交网络中的权威学者推荐模型

目前，学术社交网络平台存在的信息过载和信息不对称等问题导致学者特别是影响力低的学者很难找到自己感兴趣的内容，同时，学术社交网络中影响力大的学者对学术社区的形成具有一定的促进作用并且对影响力低的学者的科学研究具有一定的导向作用，因此提出一种融合学术社区检测的权威学者推荐模型（ISRMACD）来为学术社交网络中的低影响力学者提供推荐服务。首先，利用影响力大的学者圈作为社区的核心结构对学术社交网络中学者间的关系纽带——好友关系所产生的复杂网络拓扑关系进行学术社区检测；然后，对社区内的学者计算影响力，并实现社区内部的权威学者推荐服务。在学者网数据集上的实验结果表明，该推荐模型在不同的权威学者推荐数量下均取得了较高的推荐质量，并且每次推荐10名权威学者取得的推荐精度最高，达到70%及以上。     

Φ6400mm超大铸钢齿圈制造

拉法基都江堰水泥设备Φ4.8m×52m回转窑Φ6400mm超大铸钢齿圈是目前国内生产的最大的调质齿圈之一。该齿因采用GS—34CrMo4V钢,为三幅板单齿圈结构,其制造不但难度大,而且涉及工序多。本文根据大齿圈热加工制造过程,分析了如何保证内部质量、尺寸精度、铸造及调质变形等技术难点,采取了适当的铸造、热处理工艺和各工序质量保证措施,成功制造了一套特大型齿圈。所生产的齿圈满足拉法基公司、洪堡公司、唐山安装工程公司三方的技术要求。该齿圈的生产技术达到了国内先进水平,为集团公司今后生产同类产品提供了宝贵的技术经验。     

降压井侧壁漏水的封堵方法研究

在紧邻运营的轨交旁超大超深基坑中,因为备用降压井的存在,如果侧壁封堵不好会给基坑安全造成突涌的风险.以苏州广场项目为例,对降压井侧壁在封堵不好时出现漏水的情况下如何封堵作了针对性的阐述,在实际施工中取得了较好的成效,可供类似工程借鉴.     

Astragalus membranaceus Inhibits Peritoneal Fibrosis via Monocyte Chemoattractant Protein (MCP)-1 and the Transforming Growth Factor-β1 (TGF-β1) Pathway in Rats Submitted to Peritoneal Dialysis

Inflammation and transforming growth factor-β1 (TGF-β1) contribute to the development of peritoneal fibrosis (PF), which is associated with peritoneal dialysis (PD). Astragalus membranaceus (Astragalus) has anti-inflammatory and anti-fibrotic effects in many diseases. The goal of this study was to determine the anti-fibrotic effects of Astragalus on the PF response to PD. A rat model of PD was induced using standard PD fluid, and PF was verified by HE and Masson’s staining, as well as through the expression of fibroblast surface protein (FSP) and collagen III. The expression levels of monocyte chemoattractant protein (MCP)-1, F4/80 (macrophage/monocyte marker in rat), TGF-β1 and the downstream proteins phospho-SMAD 2/3 in dialyzed peritoneal tissue treated with or without Astragalus was evaluated using immunohistochemistry analysis. Overall correlations between MCP-1 and TGF-β1 staining were analyzed using both the Spearman and Pearson methods. The results showed that Astragalus could inhibit the recruitment and activation of monocytes/macrophages, thereby reducing the production of TGF-β1 in the dialyzed peritoneal membrane. PF was also significantly decreased following treatment with Astragalus. MCP-1 expression had a strong positive correlation with TGF-β1 sensitivity, suggesting that the anti-fibrotic function of Astragalus was mediated by MCP-1 and the TGF-β1 pathway. Our results indicate that Astragalus could be a useful agent against PD-induced PF.     

聚丙烯纤维优化黄土改良土力学性能研究

为了研究聚丙烯纤维改良黄土的效果和机理以及改善灰土和二灰土的脆性破坏形式,在黄土、灰土和二灰土中随机掺入长度为10mm的聚丙烯纤维,试验中聚丙烯纤维的质量百分比为0.25%,分别养护7d、28d、90d后,进行无侧限抗压试验和直剪试验。试验结果表明:聚丙烯纤维的掺入增强了基质土的抗压、抗剪等力学性能,提高了应力峰值应变和残余强度,减小了破坏后的应力衰减速度,抑制了破坏裂缝的贯通发育。电子显微镜扫描(SEM)结果显示,随机离散分布的聚丙烯纤维作为空间三维网络,通过胶结和摩擦作用联锁土壤颗粒和胶结凝块,形成一个统一的相干框架结构,提高了改良黄土的结构强度。