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Performance of pond–wetland complexes as a preliminary processor of drinking water sources

Journal of Environmental Sciences 2016年第1期28卷 119-133页

作者： Weidong Wang Jun Zheng Zhongqiong Wang Rongbin Zhang Qinghua Chen xinfeng Yu Chengqing Yin Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Jiaxing Water Conservancy Investment Co. Ltd. Jiaxing 314033 China Jiaxing Jiayuan Water Supply and Drainage Co. Ltd. Jiaxing 314001 China

Shijiuyang Constructed Wetland（110 hm^2） is a drinking water source treatment wetland with primary structural units of ponds and plant-bed/ditch systems. The wetland can process about 250,000 tonnes of source water in the Xincheng River every day and supplies raw water for Shijiuyang Drinking Water Plant. Daily data for 28 months indicated that the major water quality indexes of source water had been improved by one grade. The percentage increase for dissolved oxygen and the removal rates of ammonia nitrogen, iron and manganese were 73.63%, 38.86%, 35.64%, and 22.14% respectively. The treatment performance weight of ponds and plant-bed/ditch systems was roughly equal but they treated different pollutants preferentially. Most water quality indexes had better treatment efficacy with increasing temperature and inlet concentrations. These results revealed that the pond–wetland complexes exhibited strong buffering capacity for source water quality improvement. The treatment cost of Shijiuyang Drinking Water Plant was reduced by about 30.3%. Regional rainfall significantly determined the external river water levels and adversely deteriorated the inlet water quality, thus suggesting that the ＂hidden＂ diffuse pollution in the multitudinous stream branches as well as their catchments should be the controlling emphases for river source water protection in the future. The combination of pond and plant-bed/ditch systems provides a successful paradigm for drinking water source pretreatment. Three other drinking water source treatment wetlands with ponds and plant-bed/ditch systems are in operation or construction in the stream networks of the Yangtze River Delta and more people will be benefited.

关键词： Pond–wetland combination Plant-bed/ditch system Constructed root channel technology Semi-subsurface flow wetland Weighted comprehensive water quality index

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Dynamics of Exciton Transport in Two-Dimensional Materials

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中国激光 2023年第1期50卷 126-137页

作者： Xia Yuexing Zhang Shuai Wu Keming Gong Yiyang Yue Shuai Liu xinfeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academyof Sciences Beijing 100049China

In recent years,two-dimensional(2D)materials have attracted extensive interests due to the large exciton binding energy different from bulk *** peculiar properties have been discovered that have farreaching perspectives in the next generation of optoelectronic *** this review,we introduce the forms of exciton existence in 2D materials and several promising 2D materials with good applications at ***,we summarize relevant contemporary tools for probing exciton dynamics and methods of regulating 2D exciton transport,for instance,electrical regulation,stress/surface wave regulation and moirépotential regulation,***,we conclude the general development of regulation in 2D materials and propose several possible opportunities of application prospect.

关键词： materials exciton diffusion transition metal dichalcogenide van deer Waals heterostructure trion moiréexciton

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A two-parameter model for ion exchange process of ion-adsorption type rare earth ores

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Journal of Rare Earths 2020年第11期38卷 1251-1256,I0004页

作者： Ping Long Guanshi Wang Chao Zhang Ying Huang Sihai Luo School of Resources and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China Cooperative Innovation center of Efficient Development and Application for Ionic Rare Earth Resources Jiangxi University of Science and TechnologyGanzhou 341000China School of Architectural and Surveying and Mapping Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

The establishment of a mathematical model for the ion exchange process is key to creating a theoretical basis for the mining of ion-adsorption type rare earth *** samples from xinfeng,Xunwu and Anyuan were used as the test ore samples in the present study and equilibrium batch tests of ore sample leaching using various ammonium sulfate concentrations were *** results show that,after leaching,there is a negative exponential relationship between the ratio of the solid-phase rare earth ion concentration to the aqueous-phase rare earth ion concentration and the initial ammonium ion ***,there is a linear relationship between the natural logarithm of the ratio of the solidphase ammonium ion concentration to the aqueous-phase ammonium ion concentration and the initial ammonium ion *** on the above two functional relationships,a two-parameter model for the equilibrium ion exchange process of ion-adsorption type rare earth ores was *** the established model to analyze the test data the model error for the Xunwu ore sample is found to be less than 5%.The proposed model is more accurate compared with the Kerr *** two-parameter model proposed in this study provides theoretical support for the numerical simulation of column leaching(in-situ leaching)of ion-adsorption type rare earth ores.

关键词： Ion-adsorption type rare earth ores Ion exchange Empirical model

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Spectral data treatments for impervious endmember derivation and fraction mapping from Landsat ETM＋ imagery： a comparative analysis

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Frontiers of Earth Science 2015年第2期9卷 179-191页

作者： Wei WANG xinfeng YAO Minhe JI Jiao ZHANG Key Laboratory of GIScience (Ministry of Education of China) East China Normal University Shanghai 200241 China Agricultural Information Institute of Science and Technology Shanghai Academy of Agricultural Sciences Shanghai 201403 China China East-West Cooperation Research center East China Normal University Shanghai 200241 China

Various spectral data preprocessing approaches have been used to improve endmember extraction for urban landscape decomposition, yet little is known of their comparative adequacy for impervious surface mapping. This study tested four commonly used spectral data treatment strategies for endmember derivation, including original spectra, image fusion via principal component analysis, spectral normalization, and the minimum noise fraction （MNF） transformation. Land cover endmembers derived using each strategy were used to build a linear spectral mixture analysis （LSMA） model in order to unmix treated image pixels into fraction maps, and an urban imperviousness map was generated by combining the fraction maps representing imperviousness endmembers. A cross-map comparative analysis was then performed to rank the four data treatment types based on such common evaluation indices as the coefficient of determination （R2） and root mean square error （RMSE）. A Landsat 7 ETM~ multispectral image covering the metropolitan region of Shanghai, China was used as the primary dataset, and the model results were evaluated using high-resolution color- infrared aerial photographs of roughly the same time period. The test results indicated that, with the highest R2 （0.812） and the lowest RMSE （0.097） among all four preprocessing treatments, the endmembers in the form of MNF-transformed spectra produced the best model output for characterizing urban impervious surfaces. The outcome of this study may provide useful guidance for future impervious surface mapping using medium-resolution remote sensing data.

关键词： impervious surface estimation linear spectral

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Analysis and Optimisation of Halomonas Growth Factors Based on PCA and RSM

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China Petroleum Processing & Petrochemical Technology 2019年第4期21卷 81-87页

作者： Shi Ke Huang Guofu Xu Huachun Xue Jianliang Sun Jingkuan Xiao xinfeng Li Lin College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590 Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta(Binzhou University) Bingzhou 256600 Shandong Peninsula Engineering Research center of Comprehensive Brine Utilization Weifang University of Science and TechnologyShouguang 262700

The biomass of petroleum-degrading bacteria, such as Halomonas spp., is crucial to the alleviation of severe oil spills through bioremediation. In this paper, the bacterium(HDMP1) was isolated and identified. Growth factors were analysed and optimised through the single-factor experiments, the factor analysis(FA), the principal component analysis(PCA), and the response surface methodology(RSM). Results indicated that HDMP1 was identified as genus Halomonas. In the single-factor experiments, the range of suitable growth conditions for HDMP1 covered: a salt concentration of 2%-4%, a medium pH value of approximately 9, an inoculum concentration of 1.0%, a substrate concentration of 1.0%-1.4%, and a rotation rate of 140 r/min. The evaluation by FA and PCA indicated that three significant growth factors were the salt concentration, the pH value, and the rotation rate. A maximum biomass of HDMP1 was obtained under the conditions covering a salt concentration of 3.5%, a medium pH of 8, and a rotation rate of 151 r/min by optimization.

关键词： biomass factor analysis principal component analysis growth factors response surface methodology

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Strong in-plane optical anisotropy in 2D van der Waals antiferromagnet VOCl

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Nano Research 2023年第5期16卷 7481-7488页

作者： Tianle Zhang Jiantao Du Wenjun Wang Keming Wu Shuai Yue xinfeng Liu Wanfu Shen Chunguang Hu Minghui Wu Zhe Qu Shengxue Yang Chengbao Jiang School of Materials Science and Engineering Beihang UniversityBeijing 100191China Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory Chinese Academy of SciencesHefei 230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS center for Excellence in Nanoscience National center for Nanoscience and Technology Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Precision Measuring Technology and Instruments Tianjin UniversityTianjin 300072China College of Materials and Chemical Engineering MinJiang UniversityFuzhou 350108China Fujian Key laboratory of Functional marine Sensing materials Minjiang UniversityFuzhou 350108China

Two-dimensional(2D)van der Waals(vdW)magnetic materials with strong in-plane anisotropy can make possible novel applications such as optospintronics and strain *** this work,the strong in-plane optical anisotropy in 2D vdW antiferromagnet VOCl has been systematically *** optical brightness and absorption coefficient exhibit evident periodic variation with the change of incident polarization,unveiling the strong in-plane anisotropic optical *** Raman intensity in this material shows obvious dependence on the polarization angle of incident laser,demonstrating that the phonon properties possess strong in-plane ***,we have also realized in-situ visualization of in-plane optical reflection anisotropy in this ***,the strong second harmonic generation(SHG)signal can only be detected when the incident polarization is along specific in-plane crystal orientations,illustrating the presence of strong in-plane nonlinear optical *** findings will benefit the applications of VOCl in the field of polarization-dependent electronics and spintronics.

关键词： two-dimensional material vanadium oxide chloride in-plane optical anisotropy linear dichroism nonlinear optics

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Exciton–polaritons in semiconductors

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Journal of Semiconductors 2019年第9期40卷 6-7页

作者： Qing Zhang xinfeng Liu Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

In 1951,Huang firstly proposed the concept of polariton and derived its dispersion relation by combing lattice vibration in ionic crystals with electromagnetic waves using classic electromagnetic theory,which was prim... 详细信息

关键词： Exciton-polaritons semiconductors theory

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From intrinsic dielectric loss to geometry patterns: Dual-principles strategy for ultrabroad band microwave absorption

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Nano Research 2021年第5期14卷 1495-1501页

作者： Bin Quan Weihua Gu Jiaqi Sheng xinfeng Lv Yuyi Mao Lie Liu Xiaogu Huang Zongjun Tian Guangbin Ji College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing210016China School of Chemistry and Materials Science Nanjing University of Information Science&TechnologyNanjing210044China National center of Supervision and Inspection on Additive Manufacturing Products Quality Wuxi214000China Shenzhen General Test Systems Inc Taohuayuan Hi-Tech ParkShenzhen518102China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing210016China

As electromagnetic absorbers with wide absorption bandwidth are highly pursued in the cutting-edge electronic and telecommunication industries, the traditional dielectric or magnetic bulky absorbers remain concerns of extending the effective absorption bandwidth. In this work, a dual-principle strategy has been proposed to make a better understanding of the impact of utilizing conductive absorption fillers coupled with implementing artificial structures design on the absorption performance. In the comparison based on the microscopic studies, the carbon nanotubes (CNTs)-based absorbers are confined to narrow operating bandwidth and relatively fixed response frequency range, which can not fulfill the ever-growing demands in the application. With subsequent macroscopic structure design based on the CNTs-based dielectric fillers, the artificial patterns show much more broadened absorption bandwidth, covering the majority of C-band, the whole X-band, and Ku-band, due to the tailored electromagnetic parameters and more reflections and scatterings. The results suggest that the combination of developing microscopic powder/bulky absorbers and macroscopic configuration design will fundamentally extend the effective operating bandwidth of microwave.

关键词： geometry patterns numerical simulation three-dimensional(3D)printing broadband microwave absorption

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Lentivirus-mediated silencing of I2PP2A through RNA interference attenuates trichloroethylene-induced cytotoxicity in human hepatic L-02 cells

Lentivirus-mediated silencing of I2PP2A through RNA interfer...

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2012深圳市预防医学会学术研讨会

作者： Xifei Yang Yingzhi Jiang Jie Li Wen-xu Hong Desheng Wu xinfeng Huang Haiyan Huang Li Zhou Lingqing Yang Jianhui Yuan Zhixiong Zhuang Jianjun Liu Key Laboratory of Modern Toxicology of Shenzhen Medical Key Laboratory of Health ToxicologyShenzhen Center for Disease Control and Prevention

Trichloroethylene(TCE) is a common chemical pollutant that exists in air,soil,and drinking *** exposure is known to cause severe hepatotoxicity,however,the mechanisms underlying TCE hepatotoxicity remain poorly *** a previous proteomics study,we found that TCE exposure up-regulated the expression of the inhibitor 2 of protein phosphatase 2A(12PP2A),a potent and specific endogenous inhibitor of protein phosphatase(PP) 2A,in human hepatic L-02 ***,we employed lentivirusmediated RNA interference(RNAi) to knock down 12PP2A expression in L-02 ceils and explored the potential role of 12PP2A in TCE-induced *** found that TCE treatment of L-02 cells causes decreased cell viability,increased apoptosis and elevated 12PP2A mRNA and protein ***-treated L-02 ceils were also found to have significantly reduced PP2A ***-mediated 12PP2A knockdown partially prevented the decrease in viability and increased apoptosis induced by TCE treatment. Knockdown of 12PP2A in TCE-treated L-02 cells also suppressed the inhibition of PP2A activity and prevented caspase-3 *** data for the first time demonstrate that the up-regulation of 12PP2A could mediate,at least in part,TCE-induced liver cell toxicity through the inhibition of PP2A activity and caspase-3-mediated pathway,and suggest that I2PP2A may play a crucial role in mediating TCE hepatotoxicity.

关键词： 12PP2A Protein phosphatase(PP) 2A Trichloroethylene(TCE) siRNA

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IGFBP-3 promotes cachexia-associated lipid loss by suppressing insulin-like growth factor/insulin signaling

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Chinese Medical Journal 2023年第8期136卷 974-985页

作者： Xiaohui Wang Jia Li Wei Zhang Feng Wang Yunzi Wu Yulin Guo Dong Wang xinfeng Yu Ang Li Fei Li Yibin Xie Department of General Surgery Xuanwu HospitalCapital Medical UniversityBeijing 100053China Department of Gastrointestinal Surgery Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102218China Department of Pancreatic and Gastric Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Pharmacology School of Basic Medical SciencesCapital Medical UniversityBeijing 100069China

Background:Progressive lipid loss of adipose tissue is a major feature of cancer-associated *** addition to systemic immune/inflammatory effects in response to tumor progression,tumor-secreted cachectic ligands also play essential roles in tumor-induced lipid ***,the mechanisms of tumor-adipose tissue interaction in lipid homeostasis are not fully ***:The yki-gut tumors were induced in fruit *** metabolic assays were performed to investigate the lipolysis level of different types of insulin-like growth factor binding protein-3(IGFBP-3)treated *** was used to display phenotypes of tumor cells and *** polymerase chain reaction(qPCR)analysis was carried out to examine the gene expression levels such as Acc1,Acly,and Fasn et ***:In this study,it was revealed that tumor-derived IGFBP-3 was an important ligand directly causing lipid loss in matured ***-3,which is highly expressed in cachectic tumor cells,antagonized insulin/IGF-like signaling(IIS)and impaired the balance between lipolysis and lipogenesis in 3T3-L1 *** medium from cachectic tumor cells,such as Capan-1 and C26 cells,contained excessive IGFBP-3 that potently induced lipolysis in ***,neutralization of IGFBP-3 by neutralizing antibody in the conditioned medium of cachectic tumor cells significantly alleviated the lipolytic effect and restored lipid storage in ***,cachectic tumor cells were resistant to IGFBP-3 inhibition of IIS,ensuring their escape from IGFBP-3-associated growth ***,cachectic tumor-derived ImpL2,the IGFBP-3 homolog,also impaired lipid homeostasis of host cells in an established cancer-cachexia model in *** importantly,IGFBP-3 was highly expressed in cancer tissues in pancreatic and colorectal cancer patients,especially higher in the sera of cachectic cancer patients than non-cachexia cancer ***:Our stu

关键词： Biomarker Cancer Cachexia Insulin-like growth factor binding protein-3 Lipid loss

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