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Health diagnosis of concrete dams using hybrid FWA with RBF-based surrogate model

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Water Science and Engineering 2019年第3期12卷 188-195页

作者： Si-qi Dou Jun-jie Li fei kang School of Hydraulic Engineering Faculty of Infrastructure Engineering Dalian University of Technology Dalian 116024 China College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China

Structural health monitoring is important to ensuring the health and safety of *** inverse analysis method based on a novel hybrid fireworks algorithm (FWA) and the radial basis function (RBF) model is proposed to diagnose the health condition of concrete *** damage of concrete dams is diagnosed by identifying the elastic modulus of materials using the displacement changes at different reservoir water *** is a global optimization intelligent *** proposed hybrid algorithm combines the FWA with the pattern search algorithm, which has a high capability for local *** of benchmark functions and pseudo-experiment examples of concrete dams illustrate that the hybrid FWA improves the convergence speed and robustness of the original *** address the time consumption problem, an RBF-based surrogate model was established to replace part of the finite element method in inverse *** examples of concrete dams illustrate that the use of an RBF-based surrogate model significantly reduces the computation time of inverse analysis with little influence on identification *** presented hybrid FWA combined with the RBF network can quickly and accurately determine the elastic modulus of materials, and then determine the health status of the concrete dam.

关键词： Fireworks algorithm(FWA) Radial basis function (RBF) network Surrogate model Inverse analysis Structural health monitoring

Performance of a single-stage auto-cascade refrigerator operating with a rectifying column at the temperature level of -60°C

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第2期12卷 139-145页

作者： Qin WANG kang CUI Teng-fei SUN Guang-ming CHEN Institute of Refrigeration and Cryogenics State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

This paper proposes a new approach to the performance optimization of an auto-cascade refrigerator(ACR) operating with a rectifying column and six types of binary refrigerants(R23/R134a,R23/R227ea,R23/R236fa,R170/R290,R170/R600a,and R170/R600) at a temperature level of -60 °C. Half of the six binary refrigerants are nonflammable,of which the 0.5 and the 0.6 mole fractions of R23 for the R23/R236fa possess the most prospective composition for the medium and low suction pressure compressors,respectively. The remaining three binary refrigerants are flammable but with low global warming potentials,of which the 0.6 mole fraction of R170 for the R170/R600 is the most prospective one. The results show that the overall matching as well as local matching of heat capacity rates of hot and cold refrigerants in the recuperators are important for the improvement of coefficient of performance of the cycle,which can be adjusted through the simultaneous optimization of the pressure level and composition. The new approach proposed also offers a wider range of applications to the optimization in performance of the cycle using multi-component refrigerants.

关键词： Auto-cascade Binary refrigerant Refrigerator Optimization

Fluorescent probes for detection of biothiols based on “aromatic nucleophilic substitution-rearrangement” mechanism

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Chinese Chemical Letters 2019年第10期30卷 1791-1798页

作者： Yan-fei kang Li-Ya Niu Qing-Zheng Yang Hebei Key Laboratory of Quality&Safety Analysis-Testing for Agro-Products and Food and College of Laboratory MedicineHebei North UniversityZhangjiakou 075000China Key Laboratory of Radiopharmaceuticals Ministry of EducationCollege of ChemistryBeijing Normal UniversityBeijing 100875China

Biothiols,including cysteine(Cys),homocysteine(Hey),and glutathione(GSH) play important roles in physiological processes,and the detection of thiol using fluorescent probes has attracted attention due to their high sensitivity and selectively and invasive on-time ***,the similar structures and reactivity of these biothiols present great challenges for selective *** review focused on the the "aromatic nucleophilic substitution-rearrangement(SNAr-rearrangement) mechanism",which provided a powerful tool to design fluorescent probes for the discrimination between *** classify the fluorescent probes according to types of fluorophores,such as difluoroboron dipyrromethene(BODIPY),nitrobenzoxadiazole(NBD),cyanine,pyronin,naphthalimide,coumarin,and so *** hope this review will inspire exploration of new fluorescent probes for biothiols and other relevant analytes.

关键词： Biothiols Fluorescent probes Aromatic nucleophilic substitution Rearrangement Fluorophores Bioapplication

ICA-Unet:An improved U-net network for brown adipose tissue segmentation

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Journal of Innovative Optical Health Sciences 2022年第3期15卷 70-80页

作者： Haolin Wang Zhonghao Wang Jingle Wang kang Li Guohua Geng fei kang Xin Cao School of Information Sciences and Technology Northwest University Xi'anShaanxi 710127P.R.China Department of Nuclear Medicine Xijing Hospital Fourth Military Medical University Xi'anShaanxi 710127P.R.China University of Wisconsin-Madison Madison Wisconsin 53715USA

Brown adipose tissue(BAT)is a kind of adipose tissue engaging in thermoregulatory thermogenesis,metaboloregulatory thermogenesis,and *** studies have revealed that BAT activity is negatively correlated with adult body weight and is considered a target tissue for the treatment of obesity and other metabolic-related ***,the activity of BAT presents certain differences between different ages and ***,BAT segmentation based on PET/CT data is a reliable method for brown fat ***,most of the current BAT segmentation methods rely on the experience of *** this paper,an improved U-net network,ICA-Unet,is proposed to achieve automatic and precise segmentation of ***,the traditional 2D convolution layer in the encoder is replaced with a depth-wise overparameterized convolutional(Do-Conv)***,the channel attention block is introduced between the double-layer ***,the image information entropy(IIE)block is added in the skip connections to strengthen the edge ***,the performance of this method is evaluated on the dataset of PET/CT images from 368 *** results demonstrate a strong agreement between the automatic segmentation of BAT and manual annotation by *** average DICE coeffcient(DSC)is 0.9057,and the average Hausdorff distance is *** results suggest that the method proposed in this paper can achieve effcient and accurate automatic BAT segmentation and satisfy the clinical requirements of BAT.

关键词： PET/CT segmentation of brown adipose tissue U-net medical image processing deep learning

Calcium-based polymers for suppression of soil acidification by improving acid-buffering capacity and inhibiting nitrification

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Journal of Environmental Sciences 2024年第5期139卷 138-149页

作者： fei kang Yunshan Meng Yanning Ge Yun Zhang Haixiang Gao Xueqin Ren Jie Wang Shuwen Hu Beijing Key Laboratory of Farmland Soil Pollution Prevention-control and Remediation College of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China Department of Applied Chemistry China Agricultural UniversityBeijing 100193China

Soil acidification is a major threat to agricultural sustainability in tropical and subtropical *** and environmentally friendly materials,such as calcium lignosulfonate(CaLS),calcium poly(aspartic acid)(PASP-Ca),and calcium polyγ-glutamic acid(γ-PGA-Ca),are known to effectively ameliorate soil ***,their effectiveness in inhibiting soil acidification has not been *** study aimed to evaluate the effect of CaLS,PASP-Ca,andγ-PGA-Ca on the resistance of soil toward acidification as directly and indirectly(i.e.,via nitrification)caused by the application of HNO_(3)and urea,*** comparison,Ca(OH)_(2)and lignin were used as the inorganic and organic controls,*** the materials,γ-PGA-Ca drove the substantial improvements in the pH buffering capacity(pHBC)of the soil and exhibited the greatest potential in inhibiting HNO_(3)-induced soil acidification via protonation of carboxyl,complexing with Al~(3+),and cation exchange *** acidification induced by urea,CaLS was the optimal one in inhibiting acidification and increasing exchangeable acidity during ***,the sharp reduction in the population sizes of ammonia-oxidizing bacteria(AOB)and ammonia-oxidizing archaea(AOA)confirmed the inhibition of nitrification via CaLS ***,compared to improving soil pHBC,CaLS may play a more important role in suppressing indirect ***,γ-PGA-Ca was superior to PASP-Ca and CaLS in enhancing the soil pHBC and the its resistance to acidification induced by HNO_(3) addition,whereas CaLS was the best at suppressing urea-driven soil acidification by inhibiting *** conclusion,these results provide a reference for inhibiting soil re-acidification in intensive agricultural systems.

关键词： Calcium-based polymer Soil acidification pH buffering capacity Nitrification inhibition

The role of lipid metabolism in osteoporosis:Clinical implication and cellular mechanism

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Genes & Diseases 2024年第4期11卷 220-233页

作者： Jing Zhang Wenhui Hu Zhi Zou Yuheng Li fei kang Jianmei Li Shiwu Dong College of Bioengineering Chongqing UniversityChongqing 400044China Department of Biomedical Materials Science College of Biomedical EngineeringArmy Medical University(Third Military Medical University)Chongqing 400038China State Key Laboratory of Trauma and Chemical Poisoning Army Medical University(Third Military Medical University)Chongqing 400038China

In recent years,researchers have become focused on the relationship between lipids and bone metabolism ***,many diseases related to lipid metabolism dis-orders,such as nonalcoholic fatty liver disease,atherosclerosis,obesity,and menopause,are associated with osteoporotic *** has been clinically observed in humans that these lipid metabolism disorders promote changes in osteoporosis-related indicators bone mineral density and bone ***,similar osteoporotic phenotype changes were observed in high-fat and high-cholesterol-induced animal *** lipid metabolism(such as increased oxidized lipids and elevated plasma cholesterol)affects bone microenvironment ho-meostasis via cross-organ communication,promoting differentiation of mesenchymal stem cells to adipocytes,and inhibiting commitment towards ***,disturbances in lipid metabolism affect the bone metabolism balance by promoting the secretion of cyto-kines such as receptor activator of nuclear factor-kappa B ligand by osteoblasts and stimulating the differentiation of ***,this review addresses the possible link be-tween lipid metabolism disorders and osteoporosis and elucidates the potential modulatory mechanisms and signaling pathways by which lipid metabolism affects bone metabolism *** also summarize the possible approaches and prospects of intervening lipid meta-bolismforosteoporosistreatment.

关键词： Bone homeostasis Cross-organ communication Lipid metabolism Osteoclast Osteoporosis

Highly selective metal recovery from spent lithium-ion batteries through stoichiometric hydrogen ion replacement

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Frontiers of Chemical Science and Engineering 2021年第5期15卷 1243-1256页

作者： Weiguang Lv Xiaohong Zheng Li Li Hongbin Cao Yi Zhang Renjie Chen Hancheng Ou fei kang Zhi Sun National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100190China School of Materials Science&Engineering Beijing Institute of TechnologyBeijing100081China Ganzhou Highpower Technology Co. Ltd.Ganzhou341000China

Spent lithium-ion battery recycling has attracted significant attention because of its importance in regard to the environment and resource *** hydrometallurgical methods usually leach all valuable metals and subsequently extract target meals to prepare corresponding ***,Li recovery in these processes requires lengthy operational procedures,and the recovery efficiency is *** this research,we demonstrate a method to selectively recover lithium before the leaching of other elements by introducing a hydrothermal *** 90%of Li is leached from high-Ni layered oxide cathode powders,while consuming a nearly stoichiometric amount of hydrogen *** this selective recovery of Li,the transition metals remain as solid residue hydroxides or ***,the extraction of Li is found to be highly dependent on the content of transition metals in the cathode materials.A high leaching selectivity of Li(>98%)and nearly 95%leaching efficiency of Li can be reached with LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2).In this case,both the energy and material consumption during the proposed Li recovery is significantly decreased compared to traditional methods;furthermore,the proposed method makes full use of H+to leach Li+.This research is expected to provide new understanding for selectively recovering metal from secondary resources.

关键词： recycling spent LIBs selective recovery hydrothermal treatment

Structure and Thermal Stability of a One-dimensional Chain Cobalt Coordination Polymer [Co(phen)(2,4,6-TMBA)_2(H_2O)]_n

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Chinese Journal of Structural Chemistry 2006年第6期25卷 752-756页

作者： YANG Ying-Qun LI Chang-Hong LI Wei ZHANG Chun-Hua GUO Dong-Cai kang Yun-fei Department of Chemistry and Materials Science Hengyang Normal University Hengyang 421008 China College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China Department of Chemical Engineering Hunan Institute of Technology Hengyang 421008 China

A one-dimensional chain cobalt（Ⅱ） coordination polymer with 2,4,6-trimethylbenzoic acid, 1,10-phenanthroline and cobalt perchlorate anhydrous has been synthesized in the solvent mixture of water/methanol and characterized. Crystal data for this complex： tetragonal, space group I41, a = 2.0356（2）, c = 1.3779（3） nm, V= 5.7096（15） nm^3, Mr= 581.51,μ（MoKa） = 0.644, Dc = 1.353 g/cm^3, Z = 8, F（000） = 2424, final S = 1.005, R = 0.0404 and wR = 0.0865. The crystal structure shows that the cobalt ion is coordinated with two nitrogen atoms of one 1,10-phenanthroline molecule, three oxygen atoms from three 2,4,6-trimethylbenzoic acid molecules and one water molecule, giving a distorted octahedral coordination geometry. The result of TG analysis indicates that the title complex is stable till 200 ℃.

关键词： cobalt(Ⅱ) complex crystal structure thermal stability analysis

A novel denoising framework for cerenkov luminescence imaging based on spatial information improved clustering and curvature-driven diffusion

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Journal of Innovative Optical Health Sciences 2018年第4期11卷 35-42页

作者： Xin Cao Yi Sun fei kang Lin Wang Huangjian Yi Fengjun Zhao Linzhi Su Xiaowei He School of Information Science and Technology Northwest University Xi'an Shaanxi 710069P.R.China Department of Nuclear Medicine Xijing Hospital Fourth Military Medical University Xi'anShaanxi 710032P.R.China

With widely availed clinically used radionuclides,Cer enkov luminescence imaging(CLI)has become a potential tool in the field of optical molecular ***,the impulse noises introduced by high-energy gamma rays that are generated during the decay of radionuclide reduce the image quality significantly,which affects the acauracy of quantitative analysis,as well as the three dimensional *** this work,a novel denoising framework based on fuzzy dlustering and curvat ure driven difusion(CDD)is proposed to remove this kind of impulse *** improve the accuracy,the F u1zzy Local Information C-Means algorithm,where spatial information is evolved,is *** evaluate the per formance of the proposed framework sys-tematically with a series of experiments,and the corresponding results demonstrate a better denoising effect than those from the commonly used median filter *** hope this work may provide a useful data pre processing tool for CLI and its following studies.

关键词： Cerenkov luminescence imaging image processing radionuclide imaging