东莞市某代表性城镇污水处理厂管式微孔曝气器拆卸清洗案例

东莞市某小型生活污水处理厂长期运行后,管式微孔曝气器微孔堵塞,进而导致好氧池曝气不均与鼓风机运行压力增高等问题.通过"高压冲洗机冲洗+草酸浸泡"相结合的方法对好氧工艺段管式微孔曝气器拆卸清洗,节省大笔委外清洗费用,清洗后管式微孔曝气器恢复正常的曝气能力,氧利用率显著上升,好氧池工艺稳定运行,运营能耗成本明显降低.该方法...     

织物结构对纺液着色涤纶长丝织物颜色的影响

对纺液着色涤纶长丝织物在不同织物组织及不同上机纬密时的颜色变化规律进行了测试和分析.结果表明：不同的织物组织和不同的上机纬密,着色涤纶长丝织物的色相不变,但其明度L和饱和度C均有不同程度的改变,且随着上机纬密的增加,着色涤纶加弹长丝织物的明度L和饱和度C均呈下降趋势,其变化关系表现为负指数关系.     

氯离子选择性电极-标准加入法测定碳酸稀土中氯

采用HNO₃(1+ 2)溶解样品,氯则全部以Cl^—形式溶解于溶液中,通过测定溶液中Cl^—质量浓度,即可计算出碳酸稀土中氯含量。试验探讨了在以硝酸钾和柠檬酸三钠为总离子强度调节缓冲溶液(TISAB)体系中,主要以EDTA溶液络合稀土离子,采用氯离子选择性电极-标准加入法测定碳酸稀土中氯含量的方法。结果表明:溶液中Cl^—质量浓度在2.0～40.0 mg/L范围内,EDTA溶液和TISAB溶液用量均为10 mL,Cl^—质量浓度的负对数与相应电极电位(E)呈良好线性关系,线性相关系数为0.999 9;为保证测试结果的准确性,样品和电极响应斜率S值的测定须在同一恒温体系下进行;方法检出限为0.947 mg/L;对于5 mg/L的Cl^—,大量K⁺、Na⁺、NO₃^— 不干扰Cl^—的测定,RE³⁺、Ca²⁺、Fe²⁺、Na⁺最大允许量分别为10.0、4.0、5.5、23 g/L。按照实验方法测定碳酸镧和混合碳酸稀土中氯,结果的相对标准偏差(RSD,n=5)均小于5%;测定值与氯化银比浊法的测定值基本一致。     

Total-reflection active-mirror amplifier for high pulse energy and high average power by using a composite ceramic

A total-reflection active-mirror (TRAM) amplifier is functionally designed by using a composite ceramic for high pulse energy and high average power. A chirped-pulse regenerative amplifier with a cryogenic TRAM has been successfully demonstrated as a feasibility study. A 3.5 mJ pulse energy is obtained at a repetition rate of 100 Hz. The corresponding energy fluence on the TRAM is as high as 1.5 J/cm² for 0.46 ns short pulses. The M²-factor is below 1.1 and no significant beam distortion is observed.     

Redesigning China’s superblock neighbourhoods: policies,opportunities and challenges

In February 2016, China’s State Council released a set of guidelines representing a change in the country’s approach toward neighbourhood design: to move away from superblock neighbourhoods and create a finer network of urban blocks and streets. The paper traces the circumstances that prompted this change, drawing on a comparative review of international literature and practice, and explores the opportunities and challenges for urban design. While modifications of the superblock are somewhat overdue, this current mode of organization should not be entirely abandoned. The suggestions and overall blueprint warrant a more circumspect approach and should be adopted with discretion.     

杂环类农药废水的深度处理工艺

杂环类农药废水因其有机物含量高、毒性大而成为水处理的难题。本文介绍了膜生物反应器／高级氧化／超滤组合工艺作为杂环类农药废水深度处理方法，并对该工艺的构筑物参数、经济成本及运行结果进行分析。实验结果表明该法对杂环类农药废水有较好的处理效果，并具有运行成本低、占地面积小的特点。     

Accommodation of China’s Industrial Heritage in Urban Conservation Practices (Ⅱ)

In recent years, the conservation of industrial heritage in China has gained increasing attention within the broader context of urban conservation practices. For both policy-makers and scholars, accommodating this industrial heritage will emerge as a pertinent issue for consideration as a growing number of industrial architectural legacies dating from the Republican and Maoist eras come under (re)development pressures. This paper thus traces the development of industrial heritage conservation practices in China and discusses several dilemmas intrinsic to this type of conservation, including issues of authenticity, representativeness, and distinction. Based on comparative case studies from China and other international precedents, this paper also seeks to illustrate the different approaches that could be pursued while still attaining a balance between competing interests and claims.     

O2O电子商务的发展模式分析

文章通过对O2O(Online To Offline)电子商务模式的应用现状及其管理模式、发展过程、交易模式等方面的分析,归纳总结了当前O2O与传统电子商务这2个领域内在的区别和联系,并对当前O2O模式的应用领域和发展模式进行了细致分析,最后从信息生态学视角揭示了未来O2O模式将向本地化、区域化、服务精细化以及个性化发展。     

我国台湾地区民间参与公共建设立法的启示

在我国台湾地区,政府对于民间参与公共建设事业给予大力扶持且已形成完善的法律保障机制。而大陆地区由于缺乏相关法律政策的指导与技持,已成为阻碍民间参与公共建设事业发展的重要因素。基于对台湾地区民间参与公共建设事业发展的介绍,探讨相关法律规范的作用,为大陆地区相关法律的制定提供借鉴。