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Transformation and migration of phosphorus in excess sludge reduction pretreatment by alkaline ferrate oxidation combined with anaerobic digestion

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Journal of Environmental Sciences 2020年第6期32卷 224-234页

作者： Xiang Li yan Yuan Yong Huang Chao-ran Guo Run Jin ting-ting Liu Jun Ma School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology Suzhou 215009China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

Recently,more and more attention has been paid to the strong oxidation ability of newly prepared potassium ferrate(NAPF) in sludge reduction process,but less attention has been paid to the change of phosphorus in this *** feasibility of phosphorus migration and transformation during excess sludge reduction pretre atment using NAPF pre-oxidation combined with anaerobic digestion was *** 70 mg/g suspended solids NAPF pretreatment and 16 days anaerobic digestion,the solid-phase volatile suspended solids decreased by 44.2%,and much organic matter had been released into the liquid-phase and then degraded during digestion by indigenous *** the sludge pre-oxidation process was performed,solid-phase organic phosphorus and chemically combined phosphorus also released into the liquid-phase as PO4^3-,peaking at 100 mg/*** anaerobic digestion,the Fe3+in the liquid-phase was gradually reduced to Fe2+,and then formed Fe^2+-PO4^3- compound crystals and re-migrated to the *** concentration of PO4^3- decreased to 17.08± 1.1 mg/L in the liquid-phase after anaerobic ***,the phosphorus in the Fe^2+-PO4^3- compound accounts for 80% of the total phosphorus in the solid-phase.A large number of vivianite crystals in sludge were ***,this technology not only effectively reduces sludge,but also increases the proportion of PO43-in the sludge in the form of Vivianite.

关键词： Excess sludge Alkaline ferrate(NAPF) pre-oxidation Anaerobic digestion phosphorus Migration and transformation

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Remaining Life Prediction Method for Photovoltaic Modules Based on Two-Stage Wiener Process

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Energy Engineering 2025年第1期122卷 331-347页

作者： Jie Lin Hongchi Shen tingting Pei yan Wu School of Electrical Engineering and Information Engineering Lanzhou University of TechnologyLanzhou730050China

Photovoltaic (PV) modules, as essential components of solar power generation systems, significantly influence unitpower generation *** service life of these modules directly affects these costs. Over time, the performanceof PV modules gradually declines due to internal degradation and external environmental *** cumulativedegradation impacts the overall reliability of photovoltaic power generation. This study addresses the complexdegradation process of PV modules by developing a two-stage Wiener process model. This approach accountsfor the distinct phases of degradation resulting from module aging and environmental influences. A powerdegradation model based on the two-stage Wiener process is constructed to describe individual differences inmodule degradation processes. To estimate the model parameters, a combination of the Expectation-Maximization(EM) algorithm and the Bayesian method is employed. Furthermore, the Schwarz Information Criterion (SIC) isutilized to identify critical change points in PV module degradation trajectories. To validate the universality andeffectiveness of the proposed method, a comparative analysis is conducted against other established life predictiontechniques for PV modules.

关键词： Photovoltaic modules degradation stochastic processes lifetime prediction

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Parameter Estimation Based on Set-valued Signals:Theory and Application

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Acta Mathematicae Applicatae Sinica 2019年第2期35卷 255-263页

作者： ting WANG Hang ZHANG yan-long ZHAO The Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of Sciences

This paper summarizes the parameter estimation of systems with set-valued signals, which can be classified to three catalogs: one-time completed algorithms, iterative methods and recursive algorithms. For one-time completed algorithms, empirical measure method is one of the earliest methods to estimate parameters by using set-valued signals, which has been applied to the adaptive tracking of periodic target signals. The iterative methods seek numerical solutions of the maximum likelihood estimation, which have been applied to both complex diseases diagnosis and radar target recognition. The recursive algorithms are constructed via stochastic approximation and stochastic gradient methods, which have been applied to adaptive tracking of non-periodic signals.

关键词： set-valued signals parameter estimation one-time completed algorithms iterative estimation algorithms recursive estimation algorithms

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晚期糖基化终末产物对心血管损伤的机制及防治策略

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心脏杂志 2017年第2期29卷 241-245页

作者：张仁宇任超秦兴华李婷婷杨红艳贾敏张星第四军医大学航空航天医学系陕西西安710032 第四军医大学生理学教研室陕西西安710032

晚期糖基化终末产物(advanced glycosylation end products,AGEs)是糖酮或醛基与蛋白、脂质、氨基酸的自由氨基经不可逆反应所形成的物质,是非酶糖基化反应的最终产物。研究发现在动脉硬化、心肌舒张异常及内皮功能紊乱等心血管疾病中... 详细信息

晚期糖基化终末产物(advanced glycosylation end products,AGEs)是糖酮或醛基与蛋白、脂质、氨基酸的自由氨基经不可逆反应所形成的物质,是非酶糖基化反应的最终产物。研究发现在动脉硬化、心肌舒张异常及内皮功能紊乱等心血管疾病中都出现AGEs水平的增加,并且抑制AGEs的产生或作用具有心血管保护作用。因此,AGEs可以作为防治心血管疾病的一个潜在靶点。本文重点综述了AGEs的来源、心血管损伤机制及防治策略。

关键词：晚期糖基化终末产物心血管损伤羧甲基赖氨酸

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Diagnosis of upper gastrointestinal perforation complicated with fistula formation and subphrenic abscess by contrast-enhanced ultrasound:A case report

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World Journal of Clinical Cases 2021年第29期9卷 8858-8863页

作者： ting-ting Qiu Rong Fu yan Luo Wen-Wu Ling Department of Medical Ultrasound West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Gastrointestinal perforation complicated by subphrenic abscess is a surgical *** diagnosis relies mainly on X-ray or computed tomography(CT),while the value of ultrasound,especially contrast-enhanced ultrasound(CEUS),has been *** SUMMARY A 37-year-old man presented with fever and edema of the lower extremities for 10 *** had a history of laparoscopic repair of gastroduodenal perforation 6 mo *** first-time intravenous CEUS indicated a diagnosis of subphrenic *** received antibiotic therapy and ultrasound-guided percutaneous drainage of the ***,second-time intravenous CEUS revealed an unsatisfactory therapeutic *** CEUS was proposed,and this examination detected communication between the abscess and the *** gastrointestinal perforation complicated by fistula formation and subphrenic abscess was diagnosed with the help of *** CT and esophagogastroduodenoscopy confirmed the *** patient recovered after the perforation was repaired by *** Intravenous and intracavitary CEUS provides helpful information for the diagnosis of upper gastrointestinal perforation complicated by fistula formation and subphrenic abscess.

关键词： Contrast-enhanced ultrasound Gastrointestinal perforation Fistula Abscess Diagnosis Case report

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Establishing a new testing protocol of the electrochemical stability window for electric double-layer capacitors

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Science China Chemistry 2025年第1期68卷 217-225页

作者： Ruilin Hou Xiaoxi Zhao tingting Liang Qingyun Dou Shan Xu Xingbin yan School of Materials Science and Engineering Sun Yat-sen University Laboratory of Clean Energy Chemistry and Materials Lanzhou Institute of Chemical Physics Chinese Academy of Sciences College of Engineering and Applied Sciences Nanjing University Center of Industrial Analysis and Testing Guangdong Academy of Science

The electrochemical stability window(ESW) is crucial for determining the energy density of electric double-layer capacitors(EDLCs). However, current ESW testing protocols of EDLCs are strongly affected by artificial factors, thereby leading to unreliable result. To solve this problem, we first identify the key shortcomings of the traditional protocols by analyzing their test principles. Subsequently, taking an aqueous carbon-based EDLC as an example, we design a side reaction descriptor to represent the response difference in the charging capacitance to side reactions between the cyclic voltammetry and galvanostatic chargedischarge methods. With the aid of this descriptor, we propose a new ESW testing protocol, which is not only able to completely avoid the adverse influence of subjective factors but also fully consider the operating condition limitations. The protocol can be extended from the single electrode to the full device. This work proposes a more rigorous definition of ESW and provides a reliable protocol for evaluating the ESW of EDLCs.

关键词： electric double-layer capacitors electrochemical stability window testing protocol side reaction descriptor operating limitation

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General Higher-Order Breather and Hybrid Solutions of the Fokas System

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Communications in Theoretical Physics 2019年第5期71卷 496-508页

作者： ting-ting Chen Peng-yan Hu Jing-Song He Department of Mathematics Ningbo UniversityNingbo315211China College of Mathematics and Statistics Shenzhen UniversityShenzhen518060China

Fokas system is the simplest(2+1)-dimensional extension of the nonlinear Schr?dinger(NLS) equation(Eq.(2), Inverse Problems 10(1994) L19-L22). By appropriately limiting on soliton solutions generated by the Hirota bilinear method, the explicit forms of n-th breathers and semi-rational solutions for the Fokas system are derived. The obtained first-order breather exhibits a range of interesting dynamics. For high-order breather, it has more rich dynamical behaviors. The first-order and the second-order breather solutions are given graphically. Using the long wave limit in soliton solutions, rational solutions are obtained, which are used to analyze the mechanism of the rogue wave and lump respectively. By taking a long waves limit of a part of exponential functions in f and g appeared in the bilinear form of the Fokas system, many interesting hybrid solutions are constructed. The hybrid solutions illustrate various superposed wave structures involving rogue waves, lumps, solitons, and periodic line waves. Their rather complicated dynamics are revealed.

关键词： Fokas system bilinear method breathers hybrid solutions

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Changes in the Vascular Cylinder of Wild Soybean Roots Under Alkaline Stress

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Journal of Integrative Agriculture 2014年第10期13卷 2164-2169页

作者： NIU Lu LU Jing-mei WU Dong-mei LI yan GAO ting-ting School of Life Sciences Northeast Normal University Qinghai Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation Northwest Institute of Plateau BiologyChinese Academy of Sciences

Changes in the vascular cylinder of wild soybean （Glycine soja Sieb. et Zucc） roots under alkaline stress were investigated in an experiment that applied 90 mmol L1 alkaline stress for 10 d at the five-trifoliate plant growth stage in Huinan County, Jilin Province, China. Root samples were collected and paraffin-cut sections were made, and the root structure was observed under an optical microscope. There were significant changes in the vascular cylinder of G. soja roots under alkaline stress. Root diameter was reduced and the vascular cylinder changed from tetrarch to triarch pattern. Alkaline stress resulted in reduced, diameters of root vessels, and a large amount of residual, alkaline solution was stained cyaneous in vessels. The paratracheal parenchymatous cells of the vessels were large and there was little secondary xylem. Thus, alkaline stress caused structural changes in the vascular cylinder of G. soja.

关键词： Glycine soja Sieb. et Zucc alkaline stress anatomical structure tetrarch condition of vascular cylinder triarchcondition of vascular cylinder

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Experimental Study of Overtopping on Sea Dikes and Coastal Flooding Under the Coupled Processes of Tides and Waves

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China Ocean Engineering 2022年第3期36卷 413-426页

作者： LI yan-ting ZENG Cheng-jie Zhao Yi-han HU Po SUN Tian-ting HOU Yi-jun MO Dong-xue WANG Deng-ting School of Civil Engineering Tianjin UniversityTianjin 300350China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China Water Resources Department of Jiangsu Province Nanjing 210029China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Laboratory for Ocean and Climate Dynamics Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

Storm surges are cataclysmic natural disasters that occur along the coasts and are usually accompanied by large *** effects of coupled storm surges and waves can pose a significant threat to coastal *** labo-ratory studies on the effects of storm surges and waves on coastal structures have typically utilized steady water levels and constant wave *** indoor simulation of the coupled processes of tides and waves is developed by adding a tide generation system to an existing laboratory wave basin to model continuous dynamic tide levels so that tide generation and wave-making occur synchronously in the *** experimental methods are given,which are applied to further study waves overtopping on artificial sea dikes and coastal flooding evolution under the coupled actions of tides and *** results of the overtopping discharge obtained by the test with a dynamic water level are compared with those obtained from steady water level tests and the existing empirical *** addition,the impacts of ecological coastal shelterbelts and structures on coastal flood processes and distributions are also *** proposed simulation methods provide a new approach for studying the effects of storm surges and waves on coastal *** study also aims to provide a reference for coastal protective engineering.

关键词： storm surge water level variation wave overtopping coastal flooding experimental technique

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Synthesis and characterization of novel ternary deep eutectic solvents

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Chinese Chemical Letters 2014年第1期25卷 104-106页

作者： Yu-ting Liu yan-An Chen yan-Jun Xing Key Laboratory of Science & Technology of Eco-Textile (Donghua University) Ministry of Education College of Chemistry Chemical Engineering and BiotechnologyDonghua University

A series of room-temperature ternary deep eutectic solvents （TDESs） were prepared from imidazolium halides, zinc halides and amides. The [BMIM]Cl-ZnCl2-acetamide （1：1：1） system shows the lowest freezing point （-60℃） and lowest density in the series. The viscosity and conductivity of TDESs have an exponential relationship with temperature and can be fitted by Arrhenius equation.

关键词： Ternary deep eutectic solvents Room-temperature Synthesis Physical properties

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