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Multivariate analysis of surface water quality in the Three Gorges area of China and implications for water management

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Journal of Environmental Sciences 2011年第9期23卷 1460-1471页

作者： Jian zhao Guo Fu kun Lei yanwu Li Chinese Research Academy of Environmental Sciences Beijing 100012 China.

Multivariate statistical techniques,cluster analysis,non-parametric tests,and factor analysis were applied to analyze a water quality dataset including 13 parameters at 37 sites of the Three Gorges area,China,from 2003–2008 to investigate spatio-temporal variations and identify potential pollution *** cluster analysis,the twelve months of the year were classified into three periods of lowflow （LF）,normal-flow （NF）,and high-flow （HF）;and the 37 monitoring sites were divided into low pollution （LP）,moderate pollution （MP）,and high pollution （HP）.Dissolved oxygen （DO）,potassium permanganate index （COD Mn ）,and ammonia-nitrogen （NH 4 ＋-N） were identified as significant variables affecting temporal and spatial variations by non-parametric *** analysis identified that the major pollutants in the HP region were organic matters and nutrients during NF,heavy metals during LF,and petroleum during *** the MP region,the identified pollutants primarily included organic matter and heavy metals year-around,while in the LP region,organic pollution was significant during both NF and HF,and nutrient and heavy metal levels were high during both LF and *** main sources of pollution came from domestic wastewater and agricultural activities and runoff;however,they contributed differently to each region in regards to pollution *** the HP region,inputs from wastewater treatment plants were significant;but for MP and LP regions,water pollution was more likely from the combined effects of agriculture,domestic wastewater,and chemical *** results provide fundamental information for developing better water pollution control strategies for the Three Gorges area.

关键词： water quality spatial variations seasonal variations multivariate statistical techniques the Three Gorges

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PANoptosis-like cell death in ischemia/reperfusion injury of retinal neurons

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Neural Regeneration Research 2023年第2期18卷 357-363页

作者： Wei-Tao yan Wen-Juan zhao Xi-Min Hu Xiao-Xia Ban Wen-ya Ning Hao Wan Qi Zhang kun Xiong Department of Human Anatomy and Neurobiology School of Basic Medical ScienceCentral South UniversityChangshaHunan ProvinceChina Department of Dermatology Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Human Resources Third Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina Hunan Key Laboratory of Ophthalmology ChangshaHunan ProvinceChina Key Laboratory of Emergency and Trauma Ministry of EducationCollege of Emergency and TraumaHainan Medical UniversityHaikouHainan ProvinceChina

PANoptosis is a newly identified type of regulated cell death that consists of pyroptosis,apoptosis,and nec roptosis,which simultaneously occur during the pathophysiological process of infectious and inflammatory *** our previous lite rature mining study suggested that PANoptosis might occur in neuronal ischemia/repe rfusion injury,little experimental research has been reported on the existence of *** this study,we used in vivo and in vitro retinal neuronal models of ischemia/repe rfusion injury to investigate whether PAN optosis-like cell death(simultaneous occurrence of pyroptosis,apo ptosis,and necroptosis)exists in retinal neuronal ischemia/repe rfusion *** results showed that ischemia/repe rfusion injury induced changes in morphological features and protein levels that indicate PANoptosis-like cell death in retinal neurons both in vitro and in ***/repe rfusion inju ry also significantly upregulated caspase-1,caspase-8,and NLRP3 expression,which are important components of the *** results indicate the existence of PANoptosis-like cell death in ischemia/reperfusion injury of retinal neurons and provide preliminary experimental evidence for future study of this new type of regulated cell death.

关键词： apoptosis gasdermin-D(GSDMD) ischemia/reperfusion mixed lineage kinase domain-like protein(MLKL) necroptosis NOD-like receptor protein 3(NLRP3) PANoptosis pyroptosis receptor-interacting protein kinase 3(RIPK3) retinal neuron

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Influence of oxygen treatment and temperature on electrical properties of the epitaxial Nb-doped SrTiO_3 films on silicon

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Science China(Physics,Mechanics & Astronomy) 2013年第10期56卷 2009-2011页

作者： XIANG WenFeng WANG ShaoMin zhao kun State Key Laboratory of Heavy Oil Processing China University of Petroleum College of Science China University of Petroleum

We have fabricated the epitaxial Nb-doped SrTiO3(NbSTO) thin films on Si substrates using a TiN film as the buffer *** oxygen-treatment and temperature dependence of electrical properties has been *** treatment showed the surface change of NbSTO films has immense influence on the resistance *** resistance ratio of two resistance states decreased after oxygen *** tested-temperature rising,the resistance and resistance ratio of two resistance states *** resistance switching of Pt/NbSTO junction as a function of oxygen-treatment and temperature can be explained by the charge trapping and detrapping process in the Pt/NbSTO interface,which will help understand the resistance switching mechanism of oxides.

关键词： epitaxial Nb-doped SrTiO3 films resistance switching temperature dependence oxygen treatment

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Non-contacting characterization of PM2.5 in dusty environment with THz-TDS

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Science China(Physics,Mechanics & Astronomy) 2016年第4期59卷 86-87页

作者： HongLei Zhan kun zhao LiZhi Xiao State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum

Dear Editors,Nowadays,many developing countries(such as China)are experiencing severe air pollution due to the rapid urbanization and ***2.5,which refers to the particulate matter with an aerodynamic diameter of 2.5mm... 详细信息

关键词：颗粒物光谱表征非接触式太赫兹快速城市化发展中国家环境尘土

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Research on the Work-rest Scheduling in the Manual Order Picking Systems to Consider Human Factors

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Journal of Systems Science and Systems Engineering 2019年第3期28卷 344-355页

作者： Xiaosong zhao Na Liu Shumeng zhao Jinhui Wu kun Zhang Rui Zhang Department of Industrial Engineering Tianjin UniversityTianjin 300072China

As the status of order picking in the warehousing and distribution system has been raised,the work-rest scheduling of picking becomes particularly *** science and technology have developed rapidly,manual picking is still essential and ***,previous researches focused on the study of the sequencing,ignoring human *** paper presents a work-rest schedule model in parts to picker picking *** objectives are proposed that include minimizing the picking time and minimizing picking error *** workers'fatigue,workload is taken into account in the manual order picking systems because the fatigue can have a large influence on the picking time and the picking error rate.A genetic algorithm is used to solve a multi-objective optimization problem that the model concerns and looking for a Pareto front as the most effective methods for solving this *** the original data is given,the work-rest scheduling model is built and the work sequence,and the number of breaks are determined to be chosen by decision *** addition,a case study of the model is used to confirm that the model is effective and it is necessary to consider the human factor in the picking system.

关键词： Work-rest schedule picking system fatigue workload picking error rate

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Double-peaked decay of transient photovoltage in nanoporous ZnO/n-Si photodetector

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Science China(Physics,Mechanics & Astronomy) 2014年第6期57卷 1206-1208页

作者： LIU Hao FU Cheng zhao kun State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Key Laboratory of Oil and Gas Terahertz Spectroscopy and Photoelectric Detection China Petroleum and Chemical Industry Federation(CPCIF)

In the present work,a nanoporous ZnO/n-Si structure has been proposed as a new type infrared *** by one laser pulse with wavelength of 1064 nm,this structure exhibits a double-peak decay of transient ***,the time interval between these two peaks increases linearly with the increase of irradiated pulsed energy,indicating the promising application of this hetero-junction in photo-energy detection of infrared pulsed laser.A possible mechanism for this particular photoresponse has been discussed.

关键词： ZnO sol-gel photovoltage photodetector

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H_∞ State Estimation for Stochastic Markovian Jumping Neural Network with Time-varying Delay and Leakage Delay

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International Journal of Automation and computing 2019年第3期16卷 329-340页

作者： ya-Jun Li zhao-Wen Huang Jing-zhao Li College of Electronics and Information Engineering Shunde polytechnic

The H_∞state estimation problem for a class of stochastic neural networks with Markovian jumping parameters and leakage delay is investigated in this *** employing a suitable Lyapunov functional and inequality technic,the suffcient conditions for exponential stability as well as prescribed H_∞norm level of the state estimation error system are proposed and verified,and all obtained results are expressed in terms of strict linear matrix inequalities(LMIs).Examples and simulations are presented to show the effectiveness of the proposed methods,at the same time,the effect of leakage delay on stability of neural networks system and on the attenuation level of state estimator are discussed.

关键词： H_∞ filtering state estimation Markovian jump exponential stability linear matrix inequality(LMI) neural networks time-varying delay leakage delay

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Design and Implementation of Color Image Encryption Based on Qubit Rotation About Axis

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Chinese Journal of Electronics 2018年第4期27卷 799-807页

作者： LIU Xiande XIAO Hong LI Panchi zhao ya School of Computer and Information Technology Northeast Petroleum University

Currently, almost all color image encryption/decryption algorithms are designed based on a classical computer, in which the key space is relatively small,and the huge gains from quantum parallelism are not obtained. To address this problem, we propose a novel color image encryption/decryption method based on random rotation of qubit and Quantum Fourier transform(QFT).First, the color image is represented in a quantum superposition state |Image>, in which the color information of each pixel is described by only one qubit |c>. Then, the |c> are randomly rotated on the Bloch sphere about three coordinate axis, and the QFT is performed on the |Image>.Once again, the |c> is randomly rotated on the Bloch sphere and then the inverse QFT is performed on the |Image>,which the encryption process is implemented. The keys are the rotation angles of two above-mentioned *** decryption is the inverse process of the *** method may run on a quantum computer in the future. The simulation results on the classic computer show that our approaches have better security.

关键词： Color image representing Color image encrypting Qubit rotating Quantum Fourier transform Quantum image processing

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Radiolabeled peptide probe for tumor imaging

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Chinese Chemical Letters 2022年第7期33卷 3361-3370页

作者： ya-Qiong yan Hao Wang Yuliang zhao CAS Center for Excellence in Nanoscience CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and Technology(NCNST)Beijing 100190China

Radionuclide imaging is now the premier imaging method in clinical practice for its high sensitivity and tomographic *** clinically available radio imaging methods mostly use positron-emission tomography(PET)and single-photon emission computed tomography(SPECT)to detect anatomic abnormalities that conventional imaging techniques typically have challenges for *** agents are indispensable for radionuclide imaging,and the radionuclide is always attached to a suitable vector that achieves targeted ***,peptides have attracted increasing interest in targeting vectors of contrast agents,mainly due to their high specificity for target receptors at nanomolar concentrations and low *** peptide probes as kinds of PET/SPECT tracers had become essential tools for clinical radionuclide *** review mainly summarizes radiolabeled peptide probes for bioimaging,including fundamental concepts of radiolabeled peptide probe design,some typical peptide analogs radiocontrast agents for PET,SPECT,and the combination imaging.

关键词： Peptide Positron-emission tomography(PET) Single-photon emission computed tomography(SPECT) Bioimaging

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Characterization of polycyclic aromatic hydrocarbons and gas/particle partitioning in a coastal city, Xiamen, Southeast China

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Journal of Environmental Sciences 2010年第7期22卷 1014-1022页

作者： Jinping zhao Fuwang Zhang Jinsheng Chen ya Xu Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China Graduate School of Chinese Academy of Sciences Beijing 100049 China

An intensive sampling program had been undertaken in autumn （October, 2008） and winter （December, 2008 and January, 2009） at urban （Xiamen University and Xianyue residential area）, suburban （Institute of Urban Environment）, industrial area （Lulian Hotel） and background （Tingxi Reservoir） in Xiamen, Fujian Province, to characterize the atmospheric concentration and gas-particle phase partitioning of PAHs. The average concentration of total PAHs in winter was almost 1.7 times higher than those in autumn. The log scale plot of Kp versus sub-cooled liquid vapor pressure （PL^0） for all the data of autumn and winter season samples gave significantly different slopes. The slope for the winter samples （-0.72） was steeper than that for the autumn samples （-0.58）. The partitioning results indicated that slope values varied depending on characteristics of specific site, source region and meteorological conditions which play important roles in the partitioning of PAHs. In addition, local emission sources had a stronger effect on partitioning results than long-transported polluted plume. The sources of PAHs in five sampling sites in Xiamen also have been discussed initially. Diagnostic ratios showed that the primary source of PAHs in urban, suburban and industrial area was from vehicle exhausts. While emission from petrochemical factory and power plant was another main contributor to industrial area.

关键词： PAHs gaseous/particulate partitioning diagnostic ratio Xiamen

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