浅析业主对建设工程施工索赔的预防及处理

从业主的角度出发,对建设工程施工索赔管理的基本思路进行了论述,对索赔预防及处理的具体措施进行了分析,并对业主的施工索赔管理提出了几点思考。     

Codepositon of Nanodiamonds with Chromium(Ⅲ)

This paper studied the dispersion of Detonation Nano-diamond(DND)in acid medium,then well dispersed DND suspension with different concentrations were added to the trivalent chromium electrolyte.The chromium and chromium-nanodiamond composite coatings were prepared by composite plating process.Scanning electron microscopy(SEM) confirmed the presence of composite coatings and Energy Dispersive X-ray Analysis(EDX)revealed the composition,the effect of coating time on microhardness of chromium coatings and chromium-nanodiamond coatings were disscussd.It is found that the addition of nanodiamond increases the microhardness of the coatings.When the concentration of DND in electrolyte is 2.0-3.0 g/L,the plating time is about 15-20 min,the maximum hardness is obtained.     

Preparation of Pt Ag alloy nanoisland/graphene hybrid composites and its high stability and catalytic activity in methanol electro-oxidation

In this article, PtAg alloy nanoislands/graphene hybrid composites were prepared based on the self-organization of Au@PtAg nanorods on graphene sheets. Graphite oxides (GO) were prepared and separated to individual sheets using Hummer's method. Graphene nano-sheets were prepared by chemical reduction with hydrazine. The prepared PtAg alloy nanomaterial and the hybrid composites with graphene were characterized by SEM, TEM, and zeta potential measurements. It is confirmed that the prepared Au@PtAg alloy nanorods/graphene hybrid composites own good catalytic function for methanol electro-oxidation by cyclic voltammograms measurements, and exhibited higher catalytic activity and more stability than pure Au@Pt nanorods and Au@AgPt alloy nanorods. In conclusion, the prepared PtAg alloy nanoislands/graphene hybrid composites own high stability and catalytic activity in methanol electro-oxidation, so that it is one kind of high-performance catalyst, and has great potential in applications such as methanol fuel cells in near future.     

Mixed protein-templated luminescent metal clusters (Au and Pt) for H2O2 sensing

A simple and cost-effective method to synthesize the luminescent noble metal clusters (Au and Pt) in chicken egg white aqueous solution at room temperature is reported. The red-emitting Au cluster is used as fluorescent probe for sensitive detection of H₂O₂.     

酸侵蚀区白砂岩冻融损伤的影响因素研究

通过循环冻融试验,探究酸侵蚀地区白砂岩冻融损伤的影响因素。研究对三组白砂岩分别作不浸泡、水浸泡、酸浸泡的处理后进行不同次数的冻融循环,再进行单轴压缩试验。并从纵波波速、峰值应力、应力-应变曲线、相对杨氏模量、损伤变量等方面分析不同处理方式的影响。研究表明:水的浸泡是白砂岩冻融损伤的主要原因,酸侵蚀能在一定程度上加快白砂岩的冻融损伤,但本实验中影响不大。研究成果对寒区及酸侵蚀区的建设及工程具有一定的参考价值。     

PSQ防水防腐涂料的创新与应用

在原VSQ防水防腐涂料基础上掺海泡石乳化焦油或乳化沥青,解决了在潮湿基面嵌缝、补缝的难题:掺加普通水泥或"堵漏王"可使成本更低;掺加硅灰粉、空心微珠等材料,用于屋顶、外墙有较好的反射隔热效果.介绍了PSQ防水防腐涂料的产品性能,以及产品的应用实例和注意事项.     

脱脂大豆粕硫酸酸解试验和利用

选择脱脂大豆粕硫酸酸解条件,底物浓度20％,5％的硫酸加酸量为1:5,酸解温度80℃,酸解时间8h,作酸解试验,可获得氨基酸含量(0.91g/100ml)、还原糖含量(8.7g/100ml)、可溶性固形物含量(20g/100ml)都较高的酸解液;利用酸解液调配酱油、饮料;利用粕渣粉作贫蛋白食品添加剂,蛋白质饲料,具有可行性并有很好的效益。     

含电池储能系统的电热联合系统风电接纳能力评估

为促进风电消纳,减少“弃风”,将电池储能系统（BESS）接入电热联合系统。为考虑风功率的不确定性,基于风功率预测误差的概率特性建立风功率场景概率模型。然后,建立包含BESS的电热联合系统风电接纳能力评估模型。模型具有系统运行成本最低和“弃风”电量最小2个不同维度优化目标,且目标优化之间可能存在冲突。为求解该模型,基于改进主要目标法将其转换为多个单目标优化问题,并采用GAMS中DICOPT求解器给出风电接纳能力评估模型的帕累托解集。基于帕累托解集,从接纳电量和接纳成本两方面对BESS接入后的电热联合系统风电接纳能力进行深入分析。最后进行仿真分析,验证了该文所提模型及求解算法的有效性。     

杂环化合物在农药发展中的重要作用

在近年的农药发展中，杂环化合物农药是重要的发展趋向，而在杂环化合物中，含氨杂环化合物则是新农药发展的热点，在含氮杂环化合物中，含有吡啶，嘧啶，吡唑，三唑等杂环和稠杂环的化合物，又是发展最快，最为重要的领域，在这些领域中，出现了许多超高效的新品种，在今后的发展中，出现了许多超高效的新品种，在今后的发展中，可望出现超高效，无公害农药的新纪元。     

A CCD-based reader combined with CdS quantum dot-labeled lateral flow strips for ultrasensitive quantitative detection of CagA

Immunochromatographic assays are widely used to detect many analytes. CagA is proved to be associated closely with initiation of gastric carcinoma. Here, we reported that a charge-coupled device (CCD)-based test strip reader combined with CdS quantum dot-labeled lateral flow strips for quantitative detection of CagA was developed, which used 365-nm ultraviolet LED as the excitation light source, and captured the test strip images through an acquisition module. Then, the captured image was transferred to the computer and was processed by a software system. A revised weighted threshold histogram equalization (WTHE) image processing algorithm was applied to analyze the result. CdS quantum dot-labeled lateral flow strips for detection of CagA were prepared. One hundred sera samples from clinical patients with gastric cancer and healthy people were prepared for detection, which demonstrated that the device could realize rapid, stable, and point-of-care detection, with a sensitivity of 20 pg/mL.