TDS智能干选在郭屯煤矿的应用前景

为加快绿色矿山建设,保障矿井效益,减少煤流含矸量,以建设绿色生态和谐矿区为目标,以科技进步为支撑,采用TDS智能干选机可做到将绝大部分煤流中的矸石提前排除,用于井下充填,有效改善和稳定原煤煤质,有益于建设优质高效低耗选煤厂.     

Soft Sensor design for a Topping process in the case of small datasets

In this paper, a new strategy to cope with the identification of nonlinear models of industrial processes, when a limited number of experimental data is available, is proposed. The approach is intended to improve the generalization capabilities of the model and it is based on the integration of bootstrap resampling, noise injection and neural model stacking. A number of algorithms to stack the first level neural models are also compared. The method proposed has been applied to develop a Soft Sensor for the estimation of the Freezing Point of Kerosene in an atmospheric distillation unit (Topping) working in a refinery in Sicily, Italy. The improvements obtained thanks to the strategy proposed, with respect to a classical neural model, are shown in the paper.     

Dietary exposure to organochlorine pesticide residues of the Hong Kong adult population from a total diet study

Dietary exposure of the Hong Kong adult population to organochlorine pesticide (OCP) residues was estimated using a total diet study (TDS) approach. OCPs listed under the Stockholm Convention as persistent organic pollutants (POPs) including, aldrin, dieldrin, chlordane, chlordecone, dichlorodiphenyltricholroethane (DDT), endosulfan, endrin, heptachlor, hexachlorobenzene (HCB), α-hexachlorocyclohexanes (HCH), β-HCH, lindane, mirex, pentachlorobenzene and toxaphene, were studied. Out of 600 composite samples, 55% contained one or more OCP residues at detectable levels. The most commonly detected OCP was DDT (32% of all composite samples), followed by HCB (30%) and endosulfan (22%). The lower- and upper-bound mean exposure estimates of OCP residues ranged from 0% to 0.5% and were 0.1–8.4% of their respective health-based guidance values (HBGVs). The lower- and upper-bound 95th percentile exposure estimates ranged from 0% to 1.2% and were 0.1–13.6% of their respective HBGVs. This indicated that dietary exposures to the OCP residues analysed would be unlikely to pose unacceptable health risks to Hong Kong adults.     

总溶解固体含量(TDS)测量仪示值误差的不确定度评定

本文介绍了总溶解固体含量(TDS)测量仪的校准方法,并对其示值误差的不确定度进行评定.     

Dietary Manganese Exposure in the Adult Population in Germany—What Does it Mean in Relation to Health Risks?

Manganese is both an essential nutrient and a potential neurotoxicant. Therefore, the question arises whether the dietary manganese intake in the German population is on the low or high side. Results from a pilot total diet study in Germany presented here reveal that the average dietary manganese intake in the general population in Germany aged 14–80 years is about 2.8 mg day^?1 for a person of 70 kg body weight. This exposure level is within the intake range of 2–5 mg per person and day as recommended by the societies for nutrition in Germany, Austria, and Switzerland. No information on the dietary exposure of children in Germany can be provided so far. Although reliable information on health effects related to oral manganese exposure is limited, there is no indication from the literature that these dietary intake levels are associated with adverse health effects either by manganese deficiency or excess. However, there is limited evidence that manganese taken up as a highly bioavailable bolus, for example, uptake via drinking water or food supplements, could pose a potential risk to human health—particularly in certain subpopulations—when certain intake amounts, which are currently not well defined, are exceeded.     

江苏滨海平原微承压水层位水土体含盐特征及其相关性分析

通过采集测试土样和水样,分析了研究区地下水水化学特征和土体含盐特征。研究表明:江苏滨海平原地区微承压水为海相沉积水,以盐水为主,水化学类型主要为Cl-Na。微承压水盐分主要来自海水。成井层位土体含盐量较高,以弱盐渍土为主,盐渍土类型为氯盐渍土。土中盐分主要来自海水浸渍,且地下水中的Na+与地层中的交换性钙离子、镁离子产生了阳离子交换。土中易溶盐主要指标和地下水主要指标对应呈线性正相关,建立了矿化度和成井层位土体易溶盐各指标的线性回归模型,并采用HYRD1号井进行了验证,效果良好,说明了土体盐度分析在地下水咸化中的指示作用。     

感觉的时间优势评价方法及其应用

感觉的时间优势评价方法(TDS)是一个相对较新的概念,用来评价产品在一定时间内如咀嚼过程中的优势感官性质及其变化。这种方法通常被用来描述产品随时间变化的特点,它只需要研究在评价的各个阶段占优势的感官属性。TDS方法旨在研究香气成分和呈味物质释放与感知之间的联系,从而更好地理解它们。从食品生产和发展的角度讲,动态和多感官方面的对食品感官进行认知将会产生良好的效果,可以让消费者更好地了解品尝过程来评估食品的可接受性和感官性状。本文主要从如何获得TDS数据、TDS曲线的建立以及优化,TDS数据分析和TDS的应用来介绍TDS方法。