我国工业污水集中处理厂运行及水质特征分析

以我国工业污水集中处理厂的实际运行和监测数据为基础,分析了我国工业污水集中处理厂的设计处理能力、污水处理量、水力负荷率及使用的主要处理工艺等,研究了COD、BOD5、NH3-N、TN、TP的进出水水质特征以及与去除效率的相关关系.结果 表明,我国工业污水集中处理厂以1万～5万m3/d的规模为主,平均水力负荷率较低,为43.9％,AAO工艺、AO工艺、普通活性污泥法、SBR类、氧化沟类和MBR类为主流工艺,合计占比达76.2％;进、出水浓度值相对偏高,浓度值波动幅度较大,除总氮去除效率较低外,4项污染物的去除效率均高于80％;66.1％的工业污水集中处理厂进水基本能满足生物除磷的要求,但有56.4％的污水处理厂进水可生化性较差,53.6％的污水处理厂反硝化过程需要外加碳源;5项污染物的进出水浓度和去除效率与本指标的变量均呈显著相关性,其中进水污染物浓度对出水水质、去除效率均为正相关影响.     

潮白河生态补水对通州区水环境的影响分析

分析了潮白河生态补水对通州区河段的地表水质和地下水位的影响,通过对地表水质、地下水位监测数据分析,结果表明:补水初期,上游补水使白庙橡胶坝上段由劣V类提升至V类,水质明显改善,但由于白庙橡胶坝上游存水以及运潮减河蓄水同时下泄至潮白河下段,下游化学需氧量、总磷、氨氮浓度总体均升高;补水后期,由于上游补水量不足,白庙橡胶坝上游水质变差至劣V类,但受运潮减河泄流水量影响,下游氨氮、总磷浓度均有所下降;沿线地下水受生态补水影响不明显,浅层地下水平均埋深维持在15m左右轻微波动,而深层地下水平均埋深累计增加2.38 m,仅前疃村和杜店单点地下水埋深有所减少.分析结果为探索潮白河生态补水对改善地表水质、回补地下水等目标提供参考.     

Multitask learning for health condition identification and remaining useful life prediction: deep convolutional neural network approach

Predicting remaining useful life (RUL) is crucial for system maintenance. Condition monitoring makes not only degradation data available for RUL estimation but also categorized health status data for health state identification. However, RUL prediction has been treated as an independent process in most cases even though potential relevance exists with health status detection process. In this paper, we propose a convolution neural network based multi-task learning method to reflect the relatedness of RUL estimation with health status detection process. The proposed method applied to the C-MAPSS dataset for aero-engine unit prognostics supported superior performances to existing baseline models.

     

基于码本模型和多特征的早期烟雾检测

提出一种基于码本模型和多特征的早期烟雾检测算法。首先,利用码本模型进行前景提取;然后,结合烟雾的颜色模型和形状特征模型检测前景中的疑似烟雾区域;最后,利用烟雾的动态特性,有效地降低误检率,提高算法的鲁棒性。通过ROC曲线对比,实验结果表明,该算法具有良好的烟雾检测能力。同时,能够满足实时性要求,具有较高的实用价值。     

Synergistic effects of organically modified montmorillonite in combination with metal oxides on the fire safety enhancement of intumescent flame-retarded epoxy resins

Synergistic effects of organically modified montmorillonite (OMMT) in combination with different metal oxides (Bi₂O₃, Sb₂O₃, and MoO₃) on the fire safety enhancement of the intumescent flame-retarded epoxy resins (EPs) were systematically evaluated. The results from X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses show that the OMMT and metal oxides acquire a uniform distribution in the EP matrix, and OMMT platelets exhibit a fully exfoliated state. The flammability and thermogravimetry (TG) tests show that the intumescent flame retardant (IFR)-OMMT-metal oxide ternary system can endow EPs with the higher synergistic efficiencies on the enhancement of flame retardancy, smoke suppression properties, and charring ability compared to those of IFR or IFR-OMMT system, and the synergistic efficiency is the following order: IFR/OMMT/Sb₂O₃ > IFR/OMMT/MoO₃ > IFR/OMMT/Bi₂O₃. In particular, the sample, filled with 1.5 wt% OMMT, 1.5 wt% Sb₂O₃, and 27 wt% IFR, passes the UL94 V-0 rating and acquires the highest limiting oxygen index value of 28.5% among the samples. The IFR-OMMT-metal oxide ternary system exerts a better synergistic effect on the generation of crosslinking and aromatic structures that supply the excellent charring effect and barrier effect for the EPs, and the synergistic efficiency of IFR-OMMT-metal oxide ternary system is varied with the types of metal oxides.     

Interplay between Humoral and CLA+ T Cell Response against Candida albicans in Psoriasis

Candida albicans (CA) infections have been associated with psoriasis onset or disease flares. However, the integrated immune response against this fungus is still poorly characterized in psoriasis. We studied specific immunoglobulins in plasma and the CA response in cocultures of circulating memory CD45RA⁻ cutaneous lymphocyte antigen (CLA)^+/− T cell with autologous epidermal cells from plaque and guttate psoriasis patients (cohort 1, n = 52), and also healthy individuals (n = 17). A complete proteomic profile was also evaluated in plaque psoriasis patients (cohort 2, n = 114) regarding their anti-CA IgA levels. Increased anti-CA IgA and IgG levels are present in the plasma from plaque but not guttate psoriasis compared to healthy controls. CA cellular response is confined to CLA⁺ T cells and is primarily Th17. The levels of anti-CA IgA are directly associated with CLA⁺ Th17 response in plaque psoriasis. Proteomic analysis revealed distinct profiles in psoriasis patients with high anti-CA IgA. C-C motif chemokine ligand 18, chitinase-3-like protein 1 and azurocidin were significantly elevated in the plasma from plaque psoriasis patients with high anti-CA levels and severe disease. Our results indicate a mechanism by which Candida albicans exposure can trigger a clinically relevant IL-17 response in psoriasis. Assessing anti-CA IgA levels may be useful in order to evaluate chronic psoriasis patients.     

大型燃气轮机"两班制"运行方式下的节能探讨

以三菱M701 F4型燃气-蒸汽联合循环单轴机组为研究对象,对机组频繁调峰、朝启晚停的"两班制"新常态运行方式进行分析,从设备改造、逻辑修改等方面进行探讨.以安全、经济为前提,对相关合理性进行阐述.通过对修改方案的计算,探索更优节能运行方式,进一步提升机组的经济效益,并提出合理建议,对同类型运行机组具有一定参考意义.     

基于演化算法的奇偶校验器自动设计*

基于演化算法技术,提出一种新的设计思想,实现奇偶校验器的电路自动设计.实验证明,多目标演化算法具有较少的运算量和较高的效率,能自动设计出使用逻辑门数更少、延时更小的奇偶校验器.     

有机发光材料中间体1-羟基芘的合成工艺研究

1-羟基芘是一种重要的有机电致光材料中间体,该中间体能与一些芳烃及其衍生物进一步反应得到不同性质的光电材料,具有广阔的市场前景。为获得1-羟基芘,本文以芘为原料,在二氯甲烷溶液中,在三氯化铝的催化下与乙酰氯反应得到1-乙酰芘;然后与间氯苯过甲酸或过氧硼酸发生bayer-villiger反应,得到1-乙酰氧基芘;接着在甲醇和四氢呋喃混合溶液中水解得到1-羟基芘,该合成路线短,原料易得,适应工业化生产,经1HNMR光谱鉴定,产物与1-羟基芘结构一致。     

国外电网侧储能电站参与调频辅助服务市场的机制经验及对我国的启示

储能是高比例可再生能源电力系统稳定安全运行的重要支撑技术之一,中国调频辅助服务市场规则设计应考虑储能参与.本文概述了电网侧储能技术的调频现状,并介绍了储能为电网提供调频辅助服务具备响应时间快、调度性能好的优势,并以美国、澳大利亚和英国的调频辅助服务市场为案例,介绍了储能调频的现状,分析了国外典型调频辅助服务市场设定的适用于电网侧储能电站的规则,包括电网侧储能电站作为市场主体参与调频辅助服务市场的市场准入门槛、参与方式和价格机制;比较了不同电力市场对于电网侧储能参与调频辅助服务市场的设计的差异及其对储能参与调频辅助服务市场的影响.调研了我国电力市场建设现状,通过对比分析了我国储能参与调频辅助服务市场存在大多数地区储能的市场主体地位不明确,大部分允许储能参与的市场容量准入限制为世界典型国家限制的2倍或以上,部分地区调频收益下限过低难以反映储能调频的容量价值等不足.参考国外经验,在合适的机制设计下,我国储能调频容量需求可超过6 GW,调频辅助服务市场设计应明确赋予储能市场主体地位,随市场建设和技术发展适时降低准入门槛使分布式小容量储能参与提供调频服务,价格机制设计两部制价值以反映储能调频的容量价值并保障储能调频最低收益.