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Kinetic parameter estimation for cooling crystallization process based on cell average technique and automatic differentiation

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Chinese Journal of Chemical Engineering 2020年第6期28卷 1637-1651页

作者： Feiran Sun Tao Liu Yi Cao xiongwei ni Zoltan Kalman Nagy Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of TechnologyDalian 116024China School of Control Science and Engineering Dalian University of TechnologyDalian 116024China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310027China School of Engineering and Physical Science Heriot-Watt UniversityEdinburghUK Davidson School of Chemical Engineering Purdue UniversityWest LafayetteIndiana 47907United States

In this paper,a cell average technique(CAT)based parameter estimation method is proposed for cooling crystallization involved with particle growth,aggregation and breakage,by establishing a more efficient and accurate solution in terms of the automatic differentiation(AD)*** overcome the deficiency of CAT that demands high computation cost for implementation,a set of ordinary differential equations(ODEs)entailed from CAT based discretized population balance equation(PBE)are solved by using the AD based high-order Taylor ***,an AD based trust-region reflective(TRR)algorithm and another interior-point(IP)algorithm are established for estimating the kinetic parameters associated with particle growth,aggregation and *** a result,the estimation accuracy can be further improved while the computation cost can be significantly reduced,compared to the existing *** examples from the literature are used to illustrate the accuracy and efficiency of the AD-based CAT,TRR and IP algorithms in comparison with the existing ***,seeded batch cooling crystallization experiments ofβform L-glutamic acid are performed to validate the proposed method.

关键词： Cooling crystallization Population balance model Cell average technique Parameter estimation Automatic differentiation

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Image Analysis for In-situ Detection of Agglomeration for Needle-like Crystals

Image Analysis for In-situ Detection of Agglomeration for Ne...

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第36届中国控制会议

作者： Kang Zou Tao Liu Yan Huo Fangkun Zhang xiongwei ni Institute of Advanced Control Technology Dalian University of Technology School of Engineering and Physical Science Heriot-Watt University

ISBN: (纸本)9781538629185

A synthetic image analysis method is proposed for in-situ detection of particle agglomeration for monitoring crystallization processes,based on using a non-invasive imaging *** proposed method consists of image pre-processing,feature analysis,shape identification,and ***,in-situ captured images are pre-processed to eliminate the influence from uneven illumination background and particle ***,based on choosing the fundamental image features of needle-like crystals,a texture computation algorithm is established with a gray level co-occurrence matrix（GLCM） defined for different particle ***,a shape identification algorithm is given to distinguish the primary particles from overlapped particles in a captured ***,a re-segmentation algorithm is constructed to separate individual crystals from the overlapped crystals,by using a geometric approach and the chord-to-point distance accumulation（CPDA） technique,and then pseudo agglomerates are recognized from the overlapped crystals based on the texture *** results on the cooling crystallization of β form L-glutamic acid well demonstrate the effectiveness of the proposed image analysis method.

关键词： image analysis agglomeration texture feature re-segmentation

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Formulation of Organic Fertilizer Standard in Jiaxing City Based on NY525-2012

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Asian Agricultural Research 2013年第4期5卷 124-125,132页

作者： Jinfa HUANG xiongwei ni Jianping XIE Yanping SHI Jiaxing Work Station of Soil and Fertilizer

On the basis of research, analysis and argumentation, we conduct analysis and research on the current situation of quality of commercial organic fertilizer in Jiaxing City, and carry out the inspection and testing of organic matter indicators using the laboratory. Based on the standard of NY525-2012 Organic Fertilizer by the Ministry of Agriculture, this paper formulates the quality level indicators of local commercial organic fertilizer and adding specifications of raw materials.

关键词： Organic fertilizer Jiaxing Local standard

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Sources and Accumulation Risk of Heavy Metal in Major Animal Manure

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Animal Husbandry and Feed Science 2016年第6期8卷 318-322,326页

作者： Shi Yanping Huang Jinfa ni xiongwei Xie Jianping Ren Jiajia Jiaxing Workstation of Soil and Fertilizer Jiaxing 314050 China

Feed and corresponding manure samples were collected from 27 scale pig farms and 7 scale chicken farms in Jiaxing City, Zhejiang Province, and their heavy metal contents were analyzed. The weighted average values of Cr, Cu, Zn, Pb and As in pig feed were 4.6, 123.4,370.7, 0. 69 and 6.9 mg/kg, respectively. However, referred to Safe Use Specification of Feed Additives and MOA Announcement No. 1224, the exceeding standards rates of Cr, Cu, Zn, Pb and As in pig feed were 5.36%, 62.5%, 19.64%, 3.57% and 37.5%, respectively. The sequences of heavy metal content in pig feed successively were piglet 〉 growing pig 〉 big pig 〉 sow, but the exceeding standard rates of heavy metal in feed were big pig 〉 sow 〉 growing pig 〉 piglet, and the exceeding standard rate of big pig feed was more than 95%. The exceeding standard rates of Cu, Zn and As in chicken feed were 46.7%, 11.1% and 33.3% respectively. Based on Organic Fertilizer （ NY525 -2012 ） and Sludge Agricultural Pollution Control Standard （ GIM284-84）, Cu, Zn and As in pig manure and chicken manure exceeded the standard; the exceeding standard rates of pig manure were 71.9%, 78.9% and 42.1%, while that of chicken manure were 12.5%, 25.0% and 44.4%, respectively. The exceeding standard rates of Cu and Zn in piglet manure reached 100%. There were very significant positive correlations in Cu, Zn and As between pig feed and corresponding manure, or Hg, Cu and As between chicken feed and corresponding manure, and the correlation eoeffi 2 cients r were greater than 0.8. Besides, the correlation coefflclent r of Pb between pig feed and corresponding manure was above 0.6. Continuous and high intensity of livestock manure application significantly promoted the accumulation of heavy metal in farmland soil, but the effects on heavy metal accumulation in rice was not significant.

关键词： Livestock manure Feed Organic fertilizer Heavy metal

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Parameter Estimation for Batch Crystallization Processes using Automatic Differentiation

Parameter Estimation for Batch Crystallization Processes usi...

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第37届中国控制会议

作者： Weixu Chen Fangkun Zhang Tao Liu xiongwei ni Institute of Advanced Control Technology Dalian University of Technology School of Engineering and Physical Science Heriot-Watt University

In this paper, an automatic differentiation-based sequential quadratic programming（AD-SQP） method is proposed for parameter estimation of nonlinear growth models for industrial crystallization processes. Based on the process population balance equation（PBE） related to the size-dependent growth kinetic, the parameter estimation problem is transformed into a constrained optimization problem, such that an automatic differentiation（AD） algorithm is established to efficiently compute the gradients of the model fitting error for parameter estimation. A comparative study between SQP and AD-SQP is made for reference. Simulation results demonstrates that the proposed method is more efficient and accurate than the traditional SQP. Experiments on the seeded batch cooling crystallization of the form L-glutamic acid（-LGA） with different temperature cooling profiles are performed to apply the proposed AD-SQP to identify the growth model. The predicted moments of crystal size distribution（CSD） and solution concentration well match with the measured results.

关键词： Parameter Estimation Crystallization Automatic Differentiation Population Balance Model

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蒙脱石散保留灌肠治疗腹泻的临床研究

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中国当代医药 2012年第6期19卷 59-60页

作者：倪雄伟浙江省永康市芝英中心卫生院浙江永康321306

目的观察蒙脱石散保留灌肠治疗腹泻的临床疗效并总结护理体会。方法将100例秋季腹泻患儿随机分为两组,治疗组和对照组,每组50例。对照组给予常规治疗,治疗组在常规治疗的基础上,给予蒙脱石散保留灌肠。观察两组治疗效果及相关症状改善... 详细信息

目的观察蒙脱石散保留灌肠治疗腹泻的临床疗效并总结护理体会。方法将100例秋季腹泻患儿随机分为两组,治疗组和对照组,每组50例。对照组给予常规治疗,治疗组在常规治疗的基础上,给予蒙脱石散保留灌肠。观察两组治疗效果及相关症状改善情况。结果治疗组总有效率为98.0%,对照组总有效率为74.0%,差异具有统计学意义(P<0.05);治疗组患儿的每日排便次数、治疗天数、退热时间、脱水纠正时间与对照组比较,差异有统计学意义(P<0.05)。结论蒙脱石散保留灌肠治疗腹泻疗效显著,且护理操作简单,值得临床推广应用。

关键词：蒙脱石散保留灌肠腹泻护理体会

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环保型节氮肥料——脲铵在晚稻上的施用效果研究

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环境污染与防治 2013年第3期35卷 72-74页

作者：黄锦法石艳平王润屹倪雄伟谢建萍嘉兴市土壤肥料工作站浙江嘉兴314050 嘉兴市农业科学研究院浙江嘉兴314016

在晚稻上施用脲铵与尿素,探索脲铵和尿素对水稻产量与氮肥吸收利用率(REN)的影响效果。结果表明:(1)尽管两种氮肥含氮量不同,但施用脲铵处理的折施纯氮量比尿素处理减少34.78%,晚稻产量并不减少,反而略有增加。(2)为了保证水稻产量、提... 详细信息

在晚稻上施用脲铵与尿素,探索脲铵和尿素对水稻产量与氮肥吸收利用率(REN)的影响效果。结果表明:(1)尽管两种氮肥含氮量不同,但施用脲铵处理的折施纯氮量比尿素处理减少34.78%,晚稻产量并不减少,反而略有增加。(2)为了保证水稻产量、提高REN,当地水稻种植选择脲铵代替尿素作为氮肥效果较好,且推荐施用脲铵量为450～525kg/hm2为宜。(3)施用脲铵量较高的REN优于施用量较低,施用脲铵525～600kg/hm2(折施纯氮量为157.5～180.0kg/hm2)时,REN为34%左右;施用脲铵375～450kg/hm2时,REN约低5百分点。(4)在不施用有机肥料的条件下,从植株吸收氮量看,折施纯氮量180～200kg/hm2,才能达到氮素收支基本平衡。因此,适量施用脲铵并配施有机肥或稻草还田,可以缓解氮素不平衡的问题。

关键词：脲铵氮肥氮肥吸收利用率水稻产量复合氮肥缓释肥

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湖北宜昌磷矿伴生稀土元素分布规律、赋存状态及其开发利用前景分析

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中国地质 2024年第2期51卷 525-546页

作者：刘林王大钊陈爱章蔡雄威中南冶金地质研究所湖北宜昌443001 东华理工大学核资源与环境国家重点实验室江西南昌330013

【研究目的】湖北省宜昌磷矿中伴生有稀土元素,研究其分布规律及赋存状态,对稀土元素的回收利用具有重要意义,其作为伴生矿产的综合利用将成为未来稀土矿的重要来源。【研究方法】本文以含稀土磷块岩为主要研究对象,在系统取样的基础上... 详细信息

【研究目的】湖北省宜昌磷矿中伴生有稀土元素,研究其分布规律及赋存状态,对稀土元素的回收利用具有重要意义,其作为伴生矿产的综合利用将成为未来稀土矿的重要来源。【研究方法】本文以含稀土磷块岩为主要研究对象,在系统取样的基础上,开展岩矿鉴定、全岩地球化学分析、XRD衍射分析、SEM观察、LA-ICP-MS测试等工作。【研究结果】磷块岩中稀土元素总量ΣREE+Y为63.5×10^(-6)~271.8×10^(-6),不同层位或不同岩性的磷块岩中稀土元素含量有所差异。【结论】稀土元素含量受岩性控制明显,由白云岩→白云质磷块岩→致密块状磷矿石→泥质条带磷块岩→泥岩,含量逐渐升高。微量元素反映出宜昌磷矿的古气候以干热为主,西北部略表现出温暖湿润特点;Ce异常、V/ni和Y/Ho比值反映海水中EH条件从底部到顶部,即从Ph22成磷期到Ph13成磷期,形成水体环境逐渐氧化。宜昌磷矿中稀土元素总量整体较低,且泥岩较磷块岩中含量高,表明吸附态稀土较类质同象稀土含量高。宜昌伴生稀土磷矿资源丰富,利用合理的技术对稀土元素进行综合回收,对宜昌磷矿资源的合理利用和经济发展有重要意义。

关键词：磷矿伴生稀土分布规律赋存状态开发利用前景矿产勘查工程宜昌湖北

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不同缓控释肥搭配脲铵对水稻产量、氮素利用效率和土壤养分的影响

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浙江农业学报 2021年第1期33卷 122-130页

作者：陈贵鲁晨妮石艳平倪雄伟程旺大张红梅王保君张丽萍孙达嘉兴市农业科学研究院浙江嘉兴314016 嘉兴市土肥植保与农村能源站浙江嘉兴314050 嘉兴市南湖区农渔技术推广站浙江嘉兴314051

为了明确不同类型缓控释肥搭配脲铵在水稻减氮和节本增效方面的应用效果,特开展田间试验,以嘉兴地区常规施肥(N 225 kg·hm^-2)为对照(CK),研究了分别基于木质素类缓控释肥好乐耕(HL)、脲甲醛类缓控释肥永笑(YX)、硝化抑制剂类缓控释肥... 详细信息

为了明确不同类型缓控释肥搭配脲铵在水稻减氮和节本增效方面的应用效果,特开展田间试验,以嘉兴地区常规施肥(N 225 kg·hm^-2)为对照(CK),研究了分别基于木质素类缓控释肥好乐耕(HL)、脲甲醛类缓控释肥永笑(YX)、硝化抑制剂类缓控释肥开擂喽(KL)与脲铵搭配的一基一追模式,在较CK减氮0、20%、35%和50%条件下对常规粳稻产量、氮素利用效率和土壤养分的影响。结果表明:与CK相比,一基一追模式下减氮量超过20%时水稻产量显著(P<0.05)下降,主要原因为单位面积穗数和每穗粒数下降比例大于结实率和千粒重的增加比例。随施氮量减少,一基一追模式下水稻的氮素利用效率增加,其中,KL与脲铵组合的减氮50%处理氮素利用效率最高,达20.1 kg·kg^-1,且其谷物氮素生理利用效率较CK显著(P<0.05)增加14.7%。YX与脲铵组合的减氮20%处理的氮素吸收效率比CK显著(P<0.05)增加12.4%,表观氮肥回收效率显著(P<0.05)增加22.3%。一基一追模式下,施氮量减少时,土壤碱解氮含量下降;但是,不减氮条件下,其土壤碱解氮含量较CK显著(P<0.05)增加7.44%~9.57%。当选用KL与脲胺结合时土壤pH值较CK显著(P<0.05)下降0.17~0.31个单位。综合考虑产量、氮素利用效率、表观氮肥回收效率和土壤养分,一基一追模式下较CK减氮20%较为合理,且以脲甲醛类缓控释肥搭配脲铵的效果最佳。

关键词：缓控释肥脲铵施肥模式氮素利用效率土壤养分

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Electroless ni-Co-P Coating of Cenospheres Using Ag(NH_(3))_(2)^(+) Activator

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材料热处理学报 2004年第5B期25卷 1115-1118页

作者： ZENGAi-xiang xiongwei-hao DepartmentofChemistry ChangshaUniversityofScienceandTechnologyChangshaChina／／StateKayLaboratoryofDie＆MouldTechnologyHuazhongUniversityofScienceandTechnologyWuhanChina StateKayLaboratoryofDie＆MouldTechnology HuazhongUniversityofScienceandTechnologyWuhanChina

Electroless ni-Co-P-coating of fly-ash cenosphere particles is demonstrated in the present investigation. The Electroless ni-Co-P-coating process is modified by replacing the conventional sensitization and activation steps with only using activation step with Ag(NH3)2+ activator. The cenospheres are characterized by scanning electron microscope (SEM), energy dispersive spectroscopy (EDX), X-ray diffraction analysis (XRD) and X-ray photoelectron spectroscopy (XPS) during and after the coating process. Relatively uniform coating is obtained under the given coating conditions. The possible mechanism of electroless ni-Co-P-coating of cenospheres utilizing Ag(NH3)2+ activator is suggested. The low density ni-Co-P coated cenospheres may be utilized for manufacturing conducting polymers for EMI-shielding application and microwave absorbing materials.

关键词： ni-Co-P涂层 Ag(NH3)2^+活化剂飞灰微粒非电解镀层

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