广东省将重点检查农药台账系统有台账未使用者或将受到重罚

<正>据悉,广东省设立的"广东省农药数字监管平台"于2019年4月15日正式上线运行。为充分发挥监管平台的作用,强化农药经营台账监督管理。近日,广东省农业农村厅发布了《关于加强农药经营台账监督管理的通知》(下称《通知》)。《通知》指出,广东各地要高度重视,把农药经营台账监管工作作为加强农药管理的重点工作来抓,加强组织领导,精心部署安排,强化责     

灵活使用触发器保障数据安全

为了保障数据安全,解决由于人为的原因随意修改台账数据而造成的余额数据不准确,影响正常的销售工作的问题．介绍了如何用触发器来生成所有修改台账余额的信息。这些信息中包含了用户登录所用的账号．修改数据的时间,计算机网卡物理地址,修改前的余额,修改后的余额等内容。     

全面质量管理平台应用价值

全面质量管理平台将现代的检测技术、计算机技术、通讯技术与水泥生产工艺融为一体,以质量台账为基础,对覆盖控制组、分析组、物理组的原材料、生料、熟料、水泥等所有化验数据进行全面质量管理,并具备生料配方计算、自动台账生成、数值分析等功能,     

浅谈熟料质量图表分析法

通过对熟料质量影响因素的总结提炼,发现质量台账中的数据统计分析的可操作性很强,因此以一定时期内的熟料质量波动、变化参数为目标,通过excel表制作图表分析示例,对比找出质量台账中与熟料质量相关性最强的因素,进一步确定导致熟料强度变化的原、燃材料及系统工艺、操作变化原因,及时加以调控,从而恢复、提升熟料质量,这就是熟料质量图表分析法。     

大连海关查获1000余吨走私进境废塑料

正2018年5月22日,在海关总署组织开展的打击"洋垃圾"走私"蓝天2018"第三轮集中打击行动中,大连海关共出动警力50人,分为9个小组,在大连、鲅鱼圈等地开展行动,打掉一个利用他人许可证走私进口固体废物的犯罪团伙。依托大数据平台,大连海关对2017年侦办"征程01"专案中查获的大连起洋车队台账进行重新梳理。通过     

集团公司被市政府授予2009年度杭州市节能工作先进企业称号

<正>由于公司领导重视,2009年集团公司节能基础管理体系进一步得到健全,建立由蒋明任组长的节能工作领导小组,设立节能管理专门机构,人员到位,措施得力。严格按照企业节能管理"三项法定制度",按期报送"能源利用状况报告",建立节能工作台账,实行节能目标分解落实及考核制度,万元产值综合能耗比2008年下降23%,     

工业企业挥发性有机物综合整治工作的问题与对策探析

笔者通过组织开展珠三角某市73家重点企业的VOCs"一企一策"综合整治方案评审与整治效果核实评估工作,总结了挥发性有机物综合整治过程中存在的数据失真、源头替代困难、台账管理不规范、环境保护与安全生产要求相冲突等问题,对问题产生的原因进行深入分析,为进一步推进工业企业挥发性有机物综合整治工作提出建议。     

马兰选煤厂智能调度管理系统的研究和应用

选煤厂调度管理事项繁杂,调度员需要记录大量的生产过程数据项,为提高管理效率,马兰选煤厂在智能化建设时开发了智能调度管理系统。智能调度管理系统包括生产调度管理、设备管理两部分。生产调度管理大多数原始数据由系统自动获取,个别数据由调度员手动录入,系统经自动分析、汇总、计算后,得到选煤厂各项报表、台账以及数据统计图表。设备管理由设备台账、任务中心、问题中心、润滑管理四部分组成。通过线上多端协同,完成选煤厂设备维修、保养管理和隐患管理。     

对构建工业涂装VOC全过程管控体系的系统思考

基于溶剂型涂料与水性涂料涂装体系VOC排放水平及VOC排放成分谱的比较分析,提出了我国工业涂装VOC治理技术路线,即重在源头,全面推进粉末、水性、高固体分、紫外光固化等低VOC含量涂料;兼顾末端治理,着力提升VOC收集效率,从经济成本、减排效益、二次环境影响等方面开展喷漆废气、烘干废气治理技术的评估和筛选;针对不同工业涂装行业确定差异化的最佳可行控制技术。加强工业涂装VOC排放监管,制定覆盖"源头—过程—末端"的工业涂装排放标准体系,从执法监测、自行监测、台账管理等多个方面实施工业涂装VOC排放监控,以排污许可证为载体落实排放标准、总量控制、可行技术、自行监测、台账管理、执行报告、信息公开等要求,实现工业涂装企业全过程精细化管理。     

“互联网+”思维运用在锅炉检验中的思考

互联网+的思维方式已经在各行各业中逐步得到运用,对于特种设备检验,特别是锅炉检验而言,在业务工作中可以很好的将"互联网+"的思维运用在锅炉检验中。本文从锅炉检验风险预警和锅炉检验质量、检验的实施效率及数据管理等三个方面,阐述将互联网+的思维运用在锅炉检验中对锅炉检验的积极作用。     

A bidisperse pore diffusion model for methane displacement desorption in coal by CO2 injection

A model for competitive displacement of adsorbed methane by CO₂ injection is presented. A key feature of the model is the use of a bidisperse pore-diffusion model that accounts for both macro- and micropore diffusion in the coal matrix. The model was applied to analyse the performance of a laboratory core flush test and an excellent match to the test date was achieved. The results of history matching indicate that the overall sorption rate is controlled by the micropore diffusion. Furthermore, a variable apparent micropore diffusivity, which is dependent on the total sorbate concentration in the coal sample, is required to yield a close match to the test data.     

A two-dimensional model for gas mixing in the upper dilute zone of a circulating fluidized bed

Based on measurements in a circulating fluidized test unit with a riser of 0.4 m i.d., a two-dimensional two-phase model for gas mixing has been developed. Radial gas dispersion and gas backmixing caused by dense clusters falling countercurrently to the main flow of a lean gas/solid suspension are considered. The model has successfully been compared with experimental data over a wide range of operating conditions. The model accounts for the main mixing phenomena and may be applied to calculations of chemical reactions in CFB risers.     

An Asymptotic F Test for Uncorrelatedness in the Presence of Time Series Dependence

We propose a simple asymptotically F-distributed Portmanteau test for zero autocorrelations in an otherwise dependent time series. By employing the orthonormal series variance estimator of the variance matrix of sample autocovariances, our test statistic follows an F distribution asymptotically under fixed-smoothing asymptotics. The asymptotic F theory accounts for the estimation error in the underlying variance estimator, which the asymptotic chi-squared theory ignores. Monte Carlo simulations reveal that the F approximation is much more accurate than the corresponding chi-squared approximation in finite samples. The asymptotic F test is as easy to use as the chi-squared test: there is no need to obtain critical values by simulations. Furthermore, it has more accurate empirical sizes and substantial power advantages, comparing to other competitors.     

Short Communication: Aircraft interior panels tested according to the maritime high-speed craft code

The fire standard for aircraft interior panels has been compared to the corresponding marine standard with respect to smoke emission and heat release rate. This has been performed by testing an aircraft panel approved by the Federal Aviation Administration according to one of the International Maritime Organization standards for High-Speed Craft, according to the full-scale room fire test, ISO 9705. The test showed that even if the panel met the strict requirements of the Federal Aviation Administration it did not fulfil the apparently even stricter requirements of the International Maritime Organization. The panel failed on several accounts, including smoke production, heat release and structural integrity. © 1997 John Wiley & Sons, Ltd.     

Burning and dripping behaviors of polymers under the UL94 vertical burning test conditions

An experimental setup was constructed to record the real‐time mass data of eight pure polymers under the UL94 vertical burning test conditions. The experiments showed that the flame rises up to the clamp or the dripping occurs soon for the pure polymers. The mass burned before the flame reaching the clamp and the dripping occurrence only accounts for a small fraction of the original mass of the specimen, which differentiates the UL94 test from the cone calorimeter test. The mass loss rate of polymer specimens is in the magnitude order of 0.001–0.01 g/s. It was also found that the flame of thin specimens usually reaches the clamp sooner than that of thick specimens. Apart from the dripping behaviors found in large‐scale fires, it is found that the diameter of the first drop for the tested polymers is in the range of 2.0–10.0 mm. The mass of the first drop increases with the first dripping time. The first dripping time and the mass of the first drop increase with the thickness of the specimen, especially for polymers of large‐size dripping type. Copyright © 2009 John Wiley & Sons, Ltd.     

基于测试数据的蔗渣锅炉能量分析及能效提升措施

目前蔗渣锅炉存在服役年限较长、燃烧不充分、效率低下、燃料浪费严重以及污染物排放高等问题,对其原因分析欠缺大量现场数据。为了解决这一问题,本文对121台蔗渣锅炉进行能效测试,得出锅炉热效率达到标准限定值和目标值的数量分别仅占51.24%和0.83%;热损失最大的排烟热损失达10%,其中所含水分的热损失占到将近1/4;二氧化碳排放量平均值达到131.54kg/GJ。深入分析各影响因素与热效率的关系,得出了主要影响因素为烟气温度、过量空气系数和飞灰含碳量。并针对这些因素提出了能效提升措施。若能效均能达到限定值或目标值,每年的蔗渣消耗量将分别减少157kt或568kt,二氧化碳排放量将分别减少160kt或522kt,其他污染物排放同样会减少,推及到全国的蔗渣锅炉,节能减排潜力更巨大。     

Viscosity of the binary systems containing trifluoroethanol,water and tetraethylene glycol dimethyl ether. Prediction of the ternary viscosity from binary data

Kinematic viscosities were measured over the entire range of composition and at atmospheric pressure for the binary systems trifluoroethanol (TFE)-H₂O, TFE-tetraethylene glycol dimethyl ether (TEGDME), and TEGDME-H₂O from 293.15 to 333.15 K. The data were fitted by the Stephan and Heckenbergber (1989) correlation, which accounts for the dependence on temperature and mixture composition. Methods for predicting ternary excess viscosities from excess viscosity data for the three binary mixtures involved are examined and tested for the system TFE-H₂O-TEGDME at 303.15 K by comparing predicted and experimental data. The empirical correlation of Colinet (1967) is shown to be the best for this system.     

Mechanism of the coupled 24-electron reduction and transformations among the “blues”, the “browns” and the “reds” of ammonium metatungstate

The complete mechanistic pathway for the 24-electron redox behavior of the metatungstate anion has been determined through the simulation of cyclic voltammetry data in low pH electrolytes. After the electrochemical reduction by up to four electrons, forming the “tungsten-blues”, coupled chemical and electrochemical reactions occur with increasing complexity upon further reduction of the metatungstate anion. Quantitative analysis of the data accounts for the formation of stable reduced “tungsten-browns” from the 6- and 12-electron reduced forms, and “tungsten-reds” from the 18- and 24-electron reduced forms.     

Adhesion evaluation for a stratified system in JKR geometry

The JKR test, which consists of investigating the contact between an elastic lens and a rigid substrate, is a local and precise adhesion test. However, in the classical JKR mechanical analysis, the dimensions of the system must be large compared to the size of the contact area; we consider here a rigid substrate coated with a thin layer of a softer material. We show that this case cannot be analysed using the JKR theory. We propose a simple mechanical approach, modeling the layer as an elastic mattress, which accounts for the experimentally observed phenomena.     

纯油区薄差油层和表外储层试井解释方法分析与认识

X区纯油区二、三次井主要开采有效厚度小于0．5m的表内薄差储层和表外储层,岩芯资料统计结果表明,平均有效孔隙度18．12％,平均有效渗透率74．0×10^3μm2从试井解释统计结果看,关井时间72h内出现径向流的井仅占11。05％。根据X区纯油区二、三次井开发现状,应用目前采用的试井解释方法,对出径向流直线段的井应用水驱平均压力进行地层压力水平分析,受解释参数的影响,地层压力偏低0．61MPa,采用合理参数计算的地层压力值与注采比的关系符合油田开发规律。建议今后应用产液剖面综合分析出液厚度,并考虑砂体发育情况编制软件精确计算单井的实际供油面积,提高地层压力的解释精度;不出径向流直线段井采用关井末点压力分析地层压力水平,在关井时间短的条件下,该压力不能真实反映实际的地层压力水平。由于受产量任务影响,不能无限延长关井时间,因此有必要针对薄差油层和表外储层试井资料出径向流直线段井数比例低的现状,探索压力恢复有效测试时间,并研究应用试井早期资料进行试井解释的方法,以更好地进行储层评价和指导生产。