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基于专家PID控制的云水含量传感器设计

传感器与微系统 2024年第4期43卷 68-71页

作者：段然刘清惓杨杰汤鸿霄葛祥建恽雨涵南京信息工程大学江苏省大气环境与装备技术协同创新中心江苏南京210044 南京信息工程大学江苏省气象探测与信息处理重点实验室江苏南京210044

本文设计了一种基于热线法的便携式微型云水含量传感器。该传感器探头采用环形加热片和测温铂电阻的新结构,保证了加热的均匀性和测温的准确性。通过理论公式推导和流体仿真,传感器设计的可行性得到了进一步验证,并得出云水含量与加热... 详细信息

本文设计了一种基于热线法的便携式微型云水含量传感器。该传感器探头采用环形加热片和测温铂电阻的新结构,保证了加热的均匀性和测温的准确性。通过理论公式推导和流体仿真,传感器设计的可行性得到了进一步验证,并得出云水含量与加热片加热功率之间的函数关系。采用32位STM32F103C8T6芯片为核心,其性能保证了传感器系统的稳定性。通过专家PID控制算法实时控制传感器迎风面温度。仿真结果表明:专家PID系统的响应速度更快,适应性更强。为进行实验测试,搭建了风洞实验平台。通过实验测量,当测试云水含量值为0.5 g/m^(3)时,加热片加热功率为1.4 W,计算出实际值为0.58 g/m^(3),满足设计要求。

关键词：云水含量流体仿真专家PID算法风洞系统

维普期刊数据库博看期刊

Adsorption　characteristics　of　copper　in　rivers　contaminated　by　acid　mine　drainage　from　copper　mine

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Journal of Environmental Sciences 1996年第1期8卷 28-37页

作者： Luan Zhaokun Chen Ming tang hongxiao(Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)

In this paper, the partitioning of copper between surfacial sediments and overlaying water in Dawu-Le An River, which was contaminated by acid mine drainage resulted from mining activities,was studied by field investigation and acid dissolution *** adsorption experiments were carried out to study the adsorption of copper on amorphous iron oxyhydroxide and ore tailing *** results showed that it was the binding of copper onto the surface of amorphous Fe/Al oxyhydroxides and ore tailing particles that regulated the concentrations of dissolved Cu at downstream of Dawu River and its inlet into Le An River.A significant part of adsorbed copper was likely to be associated with amorphous Fe/Al oxyhydroxides coated on the surface of ore tailing particles. A simplified surface complexation model can be used to describe the adsorption behavior in the river.

关键词： copper mine adsorption behavior natural waters.

Comprehensive assessment of heavy metal pollution in river and lake sediments using face graph and index of geoaccumulation

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Journal of Environmental Sciences 1997年第1期9卷 40-48页

作者： Liu Wenxin tang hongxiao Luan Zhaokun Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China Res. Ctr. for Eco-Environ. Sciences Chinese Academy of Sciences Beijing 100085 China

Surface sedimental samples were collected from(1)Le An River in Jiangxi Province, south of China,and(2)several lakes located in southwest of *** of heavy metals in these samples were ***,the situations of heavy metal pollution in two regions were comprehensively assessed by combined index of geoaccumulation with visualized multi- variate graphical method——modified Chernoff Face *** graphs intuitively demonstrated strong heavy metal contamination in Le An River,especially copper ***,in lakes' sedimental samples,contamination of other heavy metals showed mild or clean except cadmium and chromium.

关键词： heavy metals sediment assessment index of geoaccumulation face graph.

Heavy metal adsorption on the Le An River sediment —The adsorption model

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Journal of Environmental Sciences 1997年第1期9卷 59-70页

作者： Wen Xianghua Du Oing tang hongxiao Research Centre for Eco-Environmental Sciences,Chinese Academy of Sciences.Beijing 100085,China Res. Ctr. for Eco-Environ. Sciences Chinese Academy of Sciences Beijing 100085 China

In this study,the surface properties and adsorption properties of the Le An River sedi- ment were modelled via surface complexation *** model parameters were determined based on the data of our potentiometric titration experiments and the metal adsorption experiments with the Le An River sediment ***,the surface complexation models for the natural sediment,in our case the Le An River sediments,which can interpret the experimental data very well were successfully *** typical surface complexation models that is the con- stant capacitance model,the diffuse layer model and the triple layer model,were considered in this *** work indicated that the consistency and the interdependency among model parame- ters together with the selection of the surface adsorbed species should be emphasized.

关键词： surface complexation model Le An River sediment potentiometric titration adsorption.

Features and mechanism for coagulation－flocculation processes of polyaluminum chloride

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Journal of Environmental Sciences 1995年第2期7卷 204-211页

作者： tang hongxiao Luan Zhaokun(State Key Laboratory of Environrnental Aquatic Chemistry, Research Center for Eco- Environmental Sciences,Chinese Academy of Sciences , Beijing100085 , China)

Ｆｅａｔｕｒｅｓａｎｄｍｅｃｈａｎｉｓｍｆｏｒｃｏａｇｕｌａｔｉｏｎ－ｆｌｏｃｃｕｌａｔｉｏｎｐｒｏｃｅｓｓｅｓｏｆｐｏｌｙａｌｕｍｉｎｕｍｃｈｌｏｒｉｄｅＴａｎｇＨｏｎｇｘｉａｏ；ＬｕａｎＺｈａｏｋｕｎ（Ｓｔａｔｅ... 详细信息

Ｆｅａｔｕｒｅｓａｎｄｍｅｃｈａｎｉｓｍｆｏｒｃｏａｇｕｌａｔｉｏｎ－ｆｌｏｃｃｕｌａｔｉｏｎｐｒｏｃｅｓｓｅｓｏｆｐｏｌｙａｌｕｍｉｎｕｍｃｈｌｏｒｉｄｅＴａｎｇＨｏｎｇｘｉａｏ；ＬｕａｎＺｈａｏｋｕｎ（ＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙｏｆＥｎ...

关键词： polyaluminum chloride coagulation - flocculation microelectrophoresis.

Adsorption of atrazine by natural organic matter and surfactant dispersed carbon nanotubes

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Journal of Environmental Sciences 2010年第8期22卷 1195-1202页

作者： Baoyou Shi, Xiaoyan Zhuang, Xiaomin Yan, Jiajuan Lu, hongxiao tang State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

The aggregation and dispersion behaviors of carbon nanotubes （CNTs） can regulate the environmental spread and fate of CNTs, as well as the organic pollutants adsorbed onto them. In this study, multi-walled carbon nanotubes （MWNTs） and single-walled carbon nanotubes （SWNTs） were surface modified with humic acids from different sources and with surfactants of different ionic types. The dispersion stability of surface modified CNTs was observed by UV-Vis spectrophotometry. The effect of humic acid and surfactant dispersion on the adsorption of atrazine by CNTs was investigated by batch equilibrium experiments. Both humic acid and surfactant could effectively disperse MWNTs, but not SWNTs, into stable suspensions under the studied conditions. Surface modified CNTs had a greatly reduced capacity for adsorption of atrazine. The inhibitory effect of peat humic acid was relatively stronger than that of soil humic acid, but the two surfactants had a similar inhibitory effect on atrazine adsorption by the two CNT types. Increases in surfactant concentration resulted in rapid decreases in the adsorption of atrazine by CNTs when the surfactant concentration was less than 0.5 critical micelle concentration.

关键词： carbon nanotubes adsorption dispersion atrazine

Distribution　of　various　aluminum　fractions　in　surface　water　of　the　Le　An　River

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Journal of Environmental Sciences 1997年第3期9卷 40-44页

作者： Liu Wenxin, tang hongxiao, Luan Zhaokun Research Center for Eco-Environmental Sciences, Beijing 100085, China

Total concentration and fractions of aluminum in water samples collected from the Le An River were determined by PCV complex colorimetry. Taking advantage of developed empirical models combined with nonlinear multivariate statistical technique, concentration of aluminum adsorbed by suspended particles, i.e. [Al ads ] was regressed with concentration of monomeric aluminum,i.e.[Al mono ], pH and turbidity. However, aluminum strongly bound with humic substances, i.e.[Al org ] was universally too low to detected in this experiment, and at least, it may be partially related with much lower DOC level along the Le An River.

关键词： aluminum fractions surface water empirical model.

The buffering effects of aquatic sediments against acidic deposition

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Journal of Environmental Sciences 1994年第1期6卷 21-28页

作者： Liao Bohan tang hongxiao(Researeh Center for Eco-Environmental Sciences. Chinese Academy of Sciences, Beijing 100085, China)

The cation exchange and the chemical weathering are two important processes for sedi-ments to buffer the acidification of surface water. In this paper, for sediments these two processeshave been studied. The relationship between BFC of sediments and ANC of the surface waters andthe weathering characteristics of sediments were discussed. The buffering effect and mechanism of sedi-ments against acidic deposition have also been studied. The results show that BFC of sediments arepositively correlative to ANC of the surface waters. the chemical weathering rate of sediments can beexpressed as R=k×[H￣ +]￣m.

关键词： acidic deposition, sediment, surface water cation exchange, chemical weathering.

Quantitative　model　for　species　distribution　of　hydroxy　polyaluminum　chloride

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Journal of Environmental Sciences 1997年第3期9卷 45-53页

作者： Feng Li, Luan Zhaokun, tang hongxiao Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

The species distribution of hydroxy polyaluminum chloride (PAC, Al T=0.1mol/L) solutions prepared through two different types of base injection was studied and compared quantitatively by Al Ferron timed complex colorimetric method(AFM) and 27 Al NMR spectroscopy method (ANM), and was simulated by using a quantitative calculating procedure of chemical equilibrium in MINEQL model. The results suggest that methodology of synthesis is very important for determining species distribution in the preparation of PAC solutions. In the PAC solution prepared by micro injection of base method(MIBM), there are at least five kinds of species including a kind of monomeric species Al 3+ , three kinds of polymeric species Al 2(OH) 4+ 2, Al 7(OH) 4+ 17 , Al 13 O 4(OH) (7- n )+ 24+ n ( n =0,2)and an aggregate of Al 13 or a solid phase Al(OH) 3 (aq.). Whereas in the PAC solution prepared by instantaneous injection of base method (IIBM), there are a kind of monomeric species Al 3+ , two kinds of polymeric species Al 2(OH) 4+ 2, Al 13 O 4(OH) (7- n )+ 24+ n ( n =0,2) and a solid phase Al(OH) 3(am). The change of species distribution in the PAC solution depends on preparing method, B(OH/Al) value and concentration.

关键词： polyaluminum species distribution quantitative analysis model calculation.