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In-situ investigation of melting characteristics of waste selective catalytic reduction catalysts during harmless melting treatment

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2021年第3期22卷 207-221页

作者： Hao ZHOU Yu-jian xing Jia-nuo XU Ming-xi ZHOU State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Institute for Thermal Power Engineering Zhejiang UniversityHangzhou 310027China

Selective catalytic reduction(SCR) catalyst waste is a hazardous solid waste that seriously threatens the environment and public *** this study,a thermal melting technology is proposed for the treatment of waste SCR *** melting characteristics and mineral phase transformation of waste SCR catalysts blended with three different groups of additives were explored by heating stage microscopy,thermogravimetric analysis/differential scanning calorimetry(TG/DSC) analysis,thermodynamic simulation,and X-ray diffraction(XRD) analysis;heavy metal leaching toxicity was tested by inductively coupled plasma-atomic emission spectrometry(I CP-AES) *** results indicated that the melting point of waste SCR catalysts can be effectively reduced with proper *** additive formula of 39.00% Fe2 O3(in weight),6.50% CaO,3.30% SiO2,and 1.20% Al2 O3 achieves the optimal fluxing behavior,significantly decreasing the initial melting temperature from 1223℃ to1169℃.Furthermore,the whole heating process of waste SCR catalysts can be divided into three stages:the solid reaction stage,the sintering stage,and the primary melting *** leaching concentrations of V,As,Pb,and Se are significantly reduced,from 10.64,1.054,0.195,and 0.347 mg/L to 0.178,0.025,0.048,and 0.003 mg/L,respectively,much lower than the standard limits after melting treatment,showing the strong immobilization capacity of optimal additives for heavy metals in waste SCR *** results demonstrate the feasibility of harmless melting treatments for waste SCR catalysts with relatively low energy consumption,providing theoretical support for a novel method of disposing of hazardous waste SCR catalysts.

关键词： Waste selective catalytic reduction(SCR)catalyst Thermal melting treatment Melting characteristics Additives Heating stage microscope Leaching toxicity

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Product Quality Prediction by a Neural Soft-Sensor Based on MSA and PCA

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International Journal of Automation and computing 2006年第1期3卷 17-22页

作者： jian Shi xing-Gao Liu National Laboratory of Industrial Control Technology Institute of Systems Enginccring Zhejiang University Hangzhou 310027 PRC

A novel soft-sensor model which incorporates PCA （principal component analysis）, RBF （Radial Basis Function） networks, and MSA （Multi-scale analysis）, is proposed to infer the properties of manufactured products from real process variables. PCA is carried out to select the most relevant process features and to eliminate the correlations of input variables; multi-scale analysis is introduced to acquire much more information and to reduce uncertainty in the system; and RBF networks are used to characterize the nonlinearity of the process. A prediction of the melt index （MI）, or quality of polypropylene produced in an actual industrial process, is taken as a case study. Research results show that the proposed method provides promising prediction reliability and accuracy.

关键词： PCA RBF MSA Polypropylene MI.

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Effect of artificial colloids on blood coagulation during shock stage of severe burn injury

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Chinese Medical Journal 2013年第17期126卷 3334-3339页

作者： ZHOU jian-jun xing Nan CHEN Jiong SHI jian-wu SU Guo-liang Department of Burn and Skin Repair Surgery Third Affiliated Hospital Wenzhou Medical College Wenzhou Zhejiang 325200 China

Background There are controversies about the use of artificial colloids. This research was aimed to determine the effect of various artificial colloids on blood coagulation in the shock stage of severe burn injury. Methods Totally, 18 female Ba-Ma mini-pigs were subjected to a 40% total body surface third-degree flame burn under anesthesia. Resuscitation therapy was applied 2 hours after the injury, using the burn shock fluid resuscitation formula commonly accepted in the surgical treatment of bums. The Ba-Ma mini-pigs were randomly assigned to three groups （six pigs in each group）： succinylated gelatin group （the artificial colloid used was succinylated gelatin Injection）, hydroxyethyl starch group （the artificial colloid used was hydroxyethyl starch （130/0.4））, and allogeneic plasma group （the colloid used was allogeneic plasma）. Blood samples were collected from the animals prior to the bum injury and again at intervals of 4, 8, 24 and 48 hours post-injury. The platelet count （PLT）, prothrombin time （PT）, international normalized ratio （INR）, activated partial thromboplastin time （APTT）, and fibrinogen （Fib） were measured, followed by a statistical analysis of all results. Results The PLT of succinylated gelatin group and hydroxyethyl starch group at intervals of 24 and 48 hours were （124.3±52.7）, （78.8±16.4）×10^9/L and （159.0±62.8）, （87.3±32.0）×10^9/L respectively. But in the allogeneic plasma group at intervals of 8, 24, and 48 hours were （234.3±52.6）, （136.0±47.4）, （75.8±31.0）×10^9/L. The decrease were all statistically significant （P 〈0.05, P 〈0.01） when compared to pre-burn （（383.3±77.9）, （382.7±65.7）, （381.0±49.4）×10^9/L）. The PLT among the three groups, at all the time points, had no statistical difference （P 〉0.05）. Compared to pre-burn （（10.8±0.9）, （11.4± 0.8）, （10.6±0.7） seconds）, the PT of succinylated gelatin group and hydroxyethyl starch group at 24 hours were （14.5±1.5） and （16.2±1.3） seconds, whereas in the allogeneic plasma group at 8 and 24 hours

关键词： burn shock colloid hydroxyethyl starch blood coagulation

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PLASMA RESISTIN LEVELS AND SINGLE-NUCLEOTIDE POLYMORPHISMS IN RESISTIN GENE 5 FLANKING REGION IN PATIENTS WITH STROKE

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Chinese Medical Sciences Journal 2007年第1期22卷 27-32页

作者： xing-jian Lin Ying-dong Zhang Qing-shan Guan Qing Di Jing-ping Shi Wei-guo Liu Department of Neurology Nanjing Brain Hospital Nanjing Medical University Nanjing 210029

Objective To analyze the role of resistin in insulin resistance (IR) through investigating the variation of plasma resistin levels and single-nucleotide polymorphisms (SNPs) in resistin gene 5’ flanking region in stroke *** In 103 atherothrombotic cerebral infarction (ACI) patients, 85 lacunar infarction (LI) patients, 70 intracerebral hemorrhage (ICH) patients, and 86 healthy controls, plasma resistin and insulin levels were measured by ELISA , SNPs in resistin gene 5’ flanking region were detected by PCR and direct DNA sequencing. The subjects’ body height and weight, the body mass index, quantitative insulin sensitivity check index (QUICKI), blood pressure, and the concentration of fasting plasma glucose, triglyceride, total cholesterol, creatinine, low-density lipoprotein, and high-density lipoprotein were also determined. Results QUICKI was significantly lower in the ACI and ICH patients (0.316±0.037 and 0.309±0.032, respectively) than that in the controls (0.342±0.043, PG and -537A>C SNPs were not significantly different among the different groups, and those SNPs were not correlated with other clinical and biochemical *** Plasma resistin is associated with stroke by participating in the development of IR. The SNPs in resistin gene 5’ flanking region has no impact on the plasma resistin level.

关键词： resistin insulin resistance single-nucleotide polymorphisms stroke

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Jackstone in the renal calyx:A rare case report

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World Journal of Clinical Cases 2023年第23期11卷 5554-5558页

作者： Hai-Feng Song Lei Liang Yu-Bao Liu Bo Xiao Wei-Guo Hu jian-xing Li Department of Urology Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102218China

BACKGROUND Jackstone is a rare entity of calculi in urinary tracts and has the characteristic appearance resembling toy *** are nearly always reported to occur in the urinary bladder,we first report a rare case of jackstone located in the obstructed renal *** SUMMARY We report a 46-year-old man presenting with intermittent,painless gross hematuria and left flank *** computed tomography revealed staghorn stones and secondary hydronephrosis.A jackstone with radiating branches was found in one of the dilated renal *** nephrolithotomy was performed and endoscopic images were recorded during the *** stone composition analysis revealed it as calcium oxalate monohydrate *** Jackstones can occur in the renal collecting system besides the *** unique appearance and imaging manifestations are the most important factors in the diagnosis of jackstones,and further exploration of the formation mechanism is required.

关键词： Jackstone Renal calyx Obstruction Case report

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Entecavir vs lamivudine therapy for na?ve patients with spontaneous reactivation of hepatitis B presenting as acute-on-chronic liver failure

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World Journal of Gastroenterology 2014年第16期20卷 4745-4752页

作者： Yang Zhang Xiao-Yu Hu Sen Zhong Fang Yang Tao-You Zhou Guo Chen Yan-Yan Wang jian-xing Luo Department of Infectious Diseases Affiliated Hospital of Chengdu University of Traditional Chinese Medicine Department of Clinical Medicine Chengdu University of Traditional Chinese Medicine Center of Infectious Diseases West China HospitalSichuan University

AIM:To investigate the short-term and long-term efficacy of entecavir versus lamivudine in patients with spontaneous reactivation of hepatitis B presenting as acute-on-chronic liver failure(ACLF).METHODS:This was a single center,prospective cohort ***,consecutive hospitalized patients received either entecavir 0.5 mg/d or lamivudine 100mg/*** patients were given standard comprehensive internal *** primary endpoint was survival rate at day 60,and secondary endpoints were reduction in hepatitis B virus(HBV)DNA and alanine aminotransferase(ALT)levels,and improvement in Child-Turcotte-Pugh(CTP)and model for end-stage liver disease(MELD)scores at day 60 and survival rate at week ***:One hundred and nineteen eligible subjects were recruited from 176 patients with severe acute exacerbation of chronic hepatitis B:65 were included in the entecavir group and 54 in the lamivudine group(full analysis set).No significant differences were found in patient baseline clinical *** day 60,entecavir did not improve the probability of survival(P=0.066),despite resulting in faster virological suppression(P<0.001),higher rates of virological response(P<0.05)and greater reductions in the CTP and MELD scores(all P<0.05)than ***,at week 52,the probability of survival was higher in the entecavir group than in the lamivudine group[42/65(64.6%)vs 26/54(48.1%),respectively;P=0.038].The pretreatment MELD score(B,1.357;95%Cl:2.138-7.062;P=0.000)and virological response at day30(B,1.556;95%Cl:1.811-12.411;P=0.002),were found to be good predictors for 52-wk ***:Entecavir significantly reduced HBV DNA levels,decreased the CTP and MELD scores,and thereby improved the long-term survival rate in patients with spontaneous reactivation of hepatitis B presenting as ACLF.

关键词： Acute-on-chronic liver failure Hepatitis B Entecavir Lamivudine Survival

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民用发动机污染排放及低污染燃烧技术发展趋势

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航空动力学报 2008年第6期23卷 986-996页

作者：赵坚行南京航空航天大学能源与动力学院南京210016

针对民用发动机污染排放的现状,介绍了低污染燃烧技术发展概况及趋势,国际民航组织(ICAO)颁布的《航空发动机的排放》标准,以及中国民用航空局(CAAC)对排气污染物的规定,分析了排气污染物的生成机理和主要影响因素以及改善措施.对6种先... 详细信息

针对民用发动机污染排放的现状,介绍了低污染燃烧技术发展概况及趋势,国际民航组织(ICAO)颁布的《航空发动机的排放》标准,以及中国民用航空局(CAAC)对排气污染物的规定,分析了排气污染物的生成机理和主要影响因素以及改善措施.对6种先进低污染燃烧室(分级、变几何、催化、贫油预混预蒸发燃烧室(LPP)、富油燃烧/淬熄/贫油燃烧技术(RQL)以及双环预混旋流(TAPS)等燃烧室)的工作原理与特点、以及应用状况作了简要分析.其中分级燃烧技术构成了先进低污染燃烧室设计的技术基础,而LPP,RQL与TAPS燃烧室为三种很有发展前途的低污染燃烧室.此外,还介绍了贫油直接喷射、燃料电池以及主动燃烧控制等三种新型的低污染燃烧技术,虽然实现这些技术难度较大,但有广阔的应用前景.

关键词：航空航天推进系统民用发动机排气污染物低污染燃烧分级燃烧室

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跨声压气机周向槽处理机匣非设计工况研究

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航空动力学报 2008年第4期23卷 687-692页

作者：祝剑虹朴英周建兴岂兴明清华大学航天航空学院北京100084

设计了某单级跨声压气机周向槽处理机匣,利用全三维定常数值模拟方法研究了三种典型转速下的机匣扩稳机理;对比分析得出处理机匣扩稳性能与压气机工况、处理槽位置的关系:转速越高,处理槽扩稳效果越好,而且位于叶尖弦长中部的处理槽更有... 详细信息

设计了某单级跨声压气机周向槽处理机匣,利用全三维定常数值模拟方法研究了三种典型转速下的机匣扩稳机理;对比分析得出处理机匣扩稳性能与压气机工况、处理槽位置的关系:转速越高,处理槽扩稳效果越好,而且位于叶尖弦长中部的处理槽更有效.当转速降低时,扩稳效果减弱,靠近尾沿的处理槽更为明显.研究表明,该压气机在降转速过程中存在一个扩稳机理的转变:在高转速下扩稳以抑制间隙涡破裂为主,而低转速下则以抑制叶尖吸力面附面层分离为主.

关键词：航空、航天推进系统压气机机匣处理数值模拟失速

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A biomechanical case study on the optimal orthodontic force on the maxillary canine tooth based on finite element analysis

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2018年第7期19卷 535-546页

作者： jian-lei WU Yun-feng LIU Wei PENG Hui-yue DONG jian-xing ZHANG Key Laboratory of E&M(Zhejiang University of Technology) Ministry of Education & Zhejiang Province Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang University Department of Stomatology Zhejiang Provincial People's Hospital

Excessive forces may cause root resorption and insufficient forces would introduce no effect in orthodontics. The objective of this study was to investigate the optimal orthodontic forces on a maxillary canine, using hydrostatic stress and logarithmic strain of the periodontal ligament（PDL） as indicators. Finite element models of a maxillary canine and surrounding tissues were developed. Distal translation/tipping forces, labial translation/tipping forces, and extrusion forces ranging from 0 to 300 g（100 g=0.98 N） were applied to the canine, as well as the force moment around the canine long axis ranging from 0 to 300 g·mm. The stress/strain of the PDL was quantified by nonlinear finite element analysis, and an absolute stress range between 0.47 k Pa（capillary pressure） and 12.8 k Pa（80% of human systolic blood pressure） was considered to be optimal, whereas an absolute strain exceeding 0.24%（80% of peak strain during canine maximal moving velocity） was considered optimal strain. The stress/strain distributions within the PDL were acquired for various canine movements, and the optimal orthodontic forces were calculated. As a result the optimal tipping forces（40–44 g for distal-direction and 28–32 g for labial-direction） were smaller than the translation forces（130–137 g for distal-direction and 110–124 g for labial-direction）. In addition, the optimal forces for labialdirection motion（110–124 g for translation and 28–32 g for tipping） were smaller than those for distal-direction motion（130–137 g for translation and 40–44 g for tipping）. Compared with previous results, the force interval was smaller than before and was therefore more conducive to the guidance of clinical treatment. The finite element analysis results provide new insights into orthodontic biomechanics and could help to optimize orthodontic treatment plans.

关键词： Biomechanics Optimal orthodontic force Finite element analysis Periodontal ligament

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Polarization imaging in atmospheric environment based on polarized reflectance retrieval

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Chinese Optics Letters 2019年第1期17卷 115-120页

作者： Huijie Zhao jian xing xingfa Gu Guorui Jia School of Instrumentation Science and Opto-electronics Engineering Beihang University Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences

A method for calculating the atmospheric parameters measurement accuracy requirement based on polarized reflectance retrieval is proposed. The at-sensor polarization states with different atmospheric parameters content are simulated based on the atmospheric radiative transfer model in order to select the key parameter affecting the polarization observation. The accuracy requirement of atmospheric parameters is derived through the polarized reflectance retrieval method. Experiment results show that retrieval accuracy of polarized reflectance of typical ground objects can be up to 90%. The atmospheric parameters measurement accuracy requirement when the retrieval accuracy is more than 75% is derived.

关键词： atmospheric environment polarized reflectance retrieval

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