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The variation of DOM during long distance water transport by the china South to north Water Diversion Scheme and impact on drinking water treatment

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Frontiers of Environmental Science & Engineering 2024年第5期18卷 85-100页

作者： Hankun Yang Yujuan li Hongyu liu nigel j.D.Graham Xue Wu jiawei Hou Mengjie liu Wenyu Wang Wenzheng Yu State Key Laboratory of Environmental Aquatic Chemistry Key Laboratory of Drinking Water Science and TechnologyResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China School of Environment and Municipal Engineering Qingdao Technological UniversityQingdao266033China Colleges of Forestry Northeast Forestry UniversityHarbin150006China Department of Civil and Environmental Engineering Imperial College LondonSouth Kensington CampusLondonSW7 2AZUK School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing100081China State Key Laboratory of Separation Membrane Processes School of Environment Science and EngineeringTiangong UniversityTianjin300387China

In this study,samples were taken from three locations,upstream to downstream,along the central route project of the china South to north Water Diversion(SnWD)scheme in summer and *** were used to reveal the variations of dissolved organic matter(DOM)during the water transfer process,and the effects of these variations on drinking water treatment and disinfection by-products formation potential(DBPs-FP).The results showed that polysaccharides accumulate in summer and reduce in winter with flow distance,which has an important effect on the overall properties of DOM,as well as on the performance of coagulation,ultrafiltration,and the formation of *** substances,and their hydrophilic content,also increased in summer and decreased in winter with flow *** contrast,the concentration of small organic substances(MW≤1000 Da)increased in both summer and winter with flow distance,which affected both nanofiltration(nF)membrane fouling and *** results provide a useful case study of spatial and temporal changes in raw water DOM during long distance water transfer and their impact on the treatment and quality of drinking water from the SnWD.

关键词： Long-distance water transfer The china South to north Water Diversion Scheme Coagulation Membrane filtration Disinfection by-products

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An Approximation Algorithm Based on Seeding Algorithm for Fuzzy k-Means Problem with Penalties

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journal of the Operations Research Society of china 2024年第2期12卷 387-409页

作者： Wen-Zhao liu Min li School of Mathematics and Statistics Shandong Normal UniversityJinan 250014ShandongChina

As a classic nP-hard problem in machine learning and computational geometry,the k-means problem aims to partition the given dataset into k clusters according to the minimal squared Euclidean *** from k-means problem and most of its variants,fuzzy k-means problem belongs to the soft clustering problem,where each given data point has relationship to every center *** to fuzzy k-means problem,fuzzy k-means problem with penalties allows that some data points need not be clustered instead of being paid *** this paper,we propose an O(αk In k)-approximation algorithm based on seeding algorithm for fuzzy k-means problem with penalties,whereαinvolves the ratio of the maximal penalty value to the minimal ***,we implement numerical experiments to show the effectiveness of our algorithm.

关键词： Approximation algorithm Seeding algorithm Fuzzy k-means problem with penalties

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Palaeoclimatic cycles and new glacial periods induced by the impact of extraterrestrial bodies

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chinese Science Bulletin 1999年第S2期44卷 128-130页

作者： WAnG Shijie, OUYAnG Ziyuan, XIAO Zhifeng and li chunlai State Key Laboratory of Environmental geochemistry, {3. of geochemistry, chinese academy of sciences, Guiyang 550002, china. State Key Laboratory of Environmental geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

THE consequence of "nuclear winter" induced by nuclear war and climatic catastrophe induced by extraterrestrial impact were widely studied for fear of the potential danger of the basic nuclear war (the totalexplosive equivalent 5 000Mt TnT). Using zero-dimensional energy balance model authors reportedthe short-term climatic effect induced by six huge Cenozoic bolide-impact events (65, 3., 15, 2.4,1.1, 0.73.MaBP). However, only the direct climatic effect of dusts yielded by the impact was considered in the previous study. In this note, based on the previous simulation results the effect of variance ofglobal reflectance with temperature on the long-term climatic change was further taken into *** with the strata records of palaeoclimatic change the relationship of impact energy with its in-

关键词： bolide impact events palaeoclimatic cycle formation of new glacial period simulating calculation Cenozoic.

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Pien Tze Huang Inhibits Proliferation of Colorectal Cancer Cells through Suppressing PnO1 Expression and Activating p53.p21 Signaling Pathway

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chinese journal of Integrative Medicine 2024年第6期30卷 515-524页

作者： CAO liu-jing liu li-ya CHEn You-qin HAn Yu-ying WEI li-hui YAO Meng-ying FAnG Yi WU Mei-zhu CHEnG Ying Thomas j.Sferra liu Hui-xin li li PEnG jun SHEn A-ling Clinical Research institute the Second Affiliated Hospital&Academy of Integrative MedicineFujian University of Traditional Chinese MedicineFuzhou350122China Fujian Key Laboratory of Integrative Medicine in Geriatrics Fujian University of Traditional Chinese MedicineFuzhou350122China Department of Pediatrics Case Western Reserve University School of MedicineUH Rainbow Babies and Children’s HospitalClevelandOH44106USA Innovation and Transformation Center Fujian University of Traditional Chinese MedicineFuzhou350122China Department of Health Management Fujian Provincial HospitalShengli Clinical College of Fujian Medical UniversityFuzhou000000China

ObjectiveTo explore the regulatory effect of Pien Tze Huang (PZH) on targeting partner of nOB1 (PnO1) and it’s down-stream mediators in colorectal cancer (CRC) *** polymerase chain reaction was performed to determine mRnA levels of PnO1, TP53. and CDKn1A. Western blotting was performed to determine protein levels of PnO1, p53. and p21. HCT-8 cells were transduced with a lentivirus over-expressing PnO1. Colony formation assay was used to detect cell survival in PnO1 overexpression of HCT-8 cells after PZH treatment. Cell-cycle distribution, cell viability and cell apoptosis were performed to identify the effect of PnO1 overexpression on cell proliferation and apoptosis of HCT-8 cells after PZH treatment. Xenograft BALB/c nude mice bearing HCT116 cells transduced with sh-PnO1 or sh-Ctrl lentivirus were evaluated. Western blot assay was performed to detect PnO1, p53. p21 and PCnA expression in tumor sections. Terminal deoxynucleotidyl transferase dUTP nick end labling (TUnEL) assay was used to determine the apoptotic cells in *** treatment decreased cell viability, down-regulated PnO1 expression, and up-regulated p53.and p21 expressions in HCT-8 cells (PnO1 overexpression attenuated the effects of PZH treatment, including the expression of p53.and p21, cell growth, cell viability, cell cycle arrest and cell apoptosis in vitro (PnO1 knockdown eliminated the effects of PZH treatment on tumor growth, inhibiting cell proliferation inhibition and apoptosis induction in vivo (PnO1 knockdown attenuated the effects of PZH treatment on the down-regulation of PnO1 and up-regulation of p53.and p21 in vivo (PnclusionThe mechanism by which PZH induces its CRC anti-proliferative effect is at least in part by regulating the expression of PnO1 and its downstream targets p53.and p21.

关键词： colorectal cancer Pien Tze Huang chinese medicine partner of nOB1 proliferation p53.p21 pathway

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Triaxial ellipsoid models of the Moon based on the laser altimetry data of Chang'E-1

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Science china Earth sciences 2010年第11期53卷 1594-1601页

作者： WAnG WenRui1,2,3. li Fei1, liu j.anj.n1, REn Xin2, ZOU XiaoDuan2,3. MU lingli2, YAn jianGuo1, ZOU Yongliao2, ZHAnG HongBo2, Lü Chang2, liu jianZhong2, ZUO Wei2, SU Yan2, WEn WeiBin2, BIAn Wei2, WAnG Min2, li chunlai2 & OUYAnG ZiYuan2 1 School of Geodesy and Geomatics, Wuhan University, Wuhan 43.079, china 2 national Astronomical Observatory of{3., Beijing 100012, china 3.Graduate School of{3., Beijing 100049, china 1. School of Geodesy and Geomatics Wuhan University Wuhan 430079 China2. National Astronomical Observatory of Chinese Academy of Sciences Beijing 100012 China3. Graduate School of Chinese Academy of Sciences Beijing 100049 China

Lunar geodetic parameters, which play an important role in lunar exploration, can be calculated from the gravity and topography data. With the CE-1 altimetry data and LP gravity model, we calculate such geodetic parameters as the principle moment of inertia, the principle inertia axes, equatorial radius, polar radius, mean radius, flattening and offset between center of mass and center of figure (DCOM-COF). According to the CE-1 altimetry data and the above geodetic parameters, a tri-axial ellipsoid (CE-1-LAM-GEO) and a tri-axial level ellipsoid (CE-1-LAM-LEVEL) are calculated individually, providing mass center and figure center offset (DCOM-COF) and parameters more reliable in direction and magnitude.

关键词： Chang’E-1 laser altimetry data lunar ellipsoid lunar gravity

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non-perturbative dynamics of flat-band systems with correlated disorder

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chinese Physics B 2024年第9期33卷 547-551页

作者： Qi li junfeng liu Ke liu Zi-Xiang Hu Zhou li GBA Branch of Aerospace Information Research institute Chinese Academy of SciencesGuangzhou 510535China Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics Guangzhou 510700China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics Chongqing UniversityChongqing 401331China University of chinese academy of sciences Beijing 100039China

We develop a numerical method for the time evolution of Gaussian wave packets on flat-band lattices in the presence of correlated *** achieve this,we introduce a method to generate random on-site energies with prescribed *** verify this method with a one-dimensional(1D)cross-stitch model,and find good agreement with analytical results obtained from the disorder-dressed evolution *** allows us to reproduce previous findings,that disorder can mobilize 1D flat-band states which would otherwise remain *** explained by the corresponding disorder-dressed evolution equations,such mobilization requires an asymmetric disorder-induced coupling to dispersive bands,a condition that is generically not fulfilled when the flat-band is resonant with the dispersive bands at a Dirac point-like *** exemplify this with the 1D lieb *** analytical expressions are not available for the two-dimensional(2D)system due to its complexity,we extend the numerical method to the 2D a–T3.model,and find that the initial flat-band wave packet preserves its localization when a=0,regardless of disorder and ***,when a̸=0,the wave packet shifts in real *** interpret this as a Berry phase controlled,disorder-induced wave-packet *** addition,we present density functional theory calculations of candidate materials,specifically Hg1−*** flat-band emerges near the G point(α=0)in the Brillouin zone.

关键词： flat-band system dynamics correlated disorder

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On electro-acoustic characteristics of a marine broadband sparker for seismic exploration

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journal of Oceanology and limnology 2024年第3期42卷 760-771页

作者： jing li Kai liu liancheng ZHAnG Chenguang liu Yanliang PEI Baohua liu Key Laboratory of Marine Geology and Metallogency First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory of Marine Geology Laoshan LaboratoryQingdao 266237China Key Laboratory of Fluid Transmission Technology of Zhejiang Province Zhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory of Submarine Acoustic Investigation and Application of Qingdao(Preparatory) Qingdao 266061China Key Laboratory of Deep Sea Mineral Resources Development Shandong(Preparatory)Qingdao 266061China

The construction of major marine infrastructure projects and the exploration and development of deep-sea mineral resources require fine imaging of seabed strata and *** highresolution marine seismic exploration based on a high broadband sparker source is an important approach to reveal seabed stratum and reservoir structure,and identify *** optimize the performance of sparker seismic source,we investigated the electro-acoustic characteristics of spark discharge under conditions of different charging voltages and electrode *** show that the sound source level increased with the increase of the charging voltage,whereas the main frequency decreased when the charging voltage *** addition,it was found that the charging capacitance had more obvious influence on the main frequency than the sound source level *** the load energy decreased with increasing electrode number,the sound source level still increased but the main frequency ***,the primary to bubble(P/B)ratio increased with the increase of the electrode *** gain a deeper insight into the electro-acoustic characteristics,we investigate the relationship between sound source level and power peak,from which a good correlation was observed.A more practical statistical analysis on the rise rate of current was processed,and a perfect logarithmic function was ***,we found that the main frequency was most possibly subjected to the electrical energy,especially the charging energy per *** results indicate that the charging energy per electrode less than 10 j could increase the main frequency to above 3.0 *** last,the main frequency could be reduced to 20 Hz when the charging energy of a single-electrode discharge was enhanced to over 4 *** study shall be helpful in developing a sparker seismic source and improving the performance for marine engineering exploration and geohazard assessment.

关键词： high-resolution marine seismic exploration sparker seismic source sound source level main frequency electro-acoustic characteristics

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Chemical-reaction-path modeling of ore-depositional processes in the Shangmanggang gold deposit, Yunnan, china

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chinese Science Bulletin 1999年第S2期44卷 174-176页

作者： li Zeqin, TU Guangchi and li Chaoyang institute of {3., chinese academy of sciences, Guiyang 550002,{3. institute of geochemistry Chinese Academy of Sciences Guiyang 550002 China

THE Shangmanggang gold deposit is located at the southwestern corner of Yunnan, china. The deposit occurs along the southwest-trending Shangmanggang Fault. near the surface, the hanging wall of the fault consists of sandstone and mudstone of the Middle jurassic Mongga Formation (j2m), and also severs asthe hanging wall of the gold orebodies. The footwall of the fault is composed of dolomitite locally intercalated with medium-bedded limestone of Lower Permian Sazipo Formation (P1s). In the depth, the faultcut into strata of the Sazipo Formation (P1s). The deposit is characterized by intense clay alteration,which is similar to the Mercur Gold Deposit, Utah of USA, and by unique hydrothermal pinnacle karsl,

关键词： chemical-reaction-path modeling gold deposit Yunnan.

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Greatly enhanced corrosion/wear resistances of epoxy coating for Mg alloy through a synergistic effect between functionalized graphene and insulated blocking layer

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journal of Magnesium and Alloys 2024年第1期12卷 332-344页

作者： Z.Y.Xue X.j.li j.H.Chu M.M.li D.n.Zou L.B.Tong School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China

The poor corrosion and wear resistances of Mg alloys seriously limit their potential applications in various *** conventional epoxy coating easily forms many intrinsic defects during the solidification process,which cannot provide sufficient *** the current study,we design a double-layer epoxy composite coating on Mg alloy with enhanced anti-corrosion/wear properties,via the spin-assisted assembly *** outer layer is functionalized graphene(FG)in waterborne epoxy resin(WEP)and the inner layer is Ce-based conversion(Ce)*** FG sheets can be homogeneously dispersed within the epoxy matrix to fill the intrinsic defects and improve the barrier *** Ce film connects the outer layer with the substrate,showing the transition *** corrosion rate of Ce/WEP/FG composite coating is 213. times lower than that of bare Mg alloy,and the wear rate is decreased by~90%.The improved corrosion resistance is attributed to the labyrinth effect(hindering the penetration of corrosive medium)and the obstruction of galvanic coupling *** synergistic effect derived from the FG sheet and blocking layer exhibits great potential in realizing the improvement of multi-functional integration,which will open up a new avenue for the development of novel composite protection coatings of Mg alloys.

关键词： Mg alloy Functionalized graphene Epoxy coating Corrosion/wear resistance Blocking layer

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Effect of Al_(2)O_(3.on the Mechanical Properties of(B_(4)C+Al_(2)O_(3.)/Al neutron Absorbing Materials

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Acta Metallurgica Sinica(English Letters) 2024年第8期37卷 1411-1420页

作者： j.X.Cai B.M.Shi n.li Y.liu Z.G.Zhang Y.n.Zan Q.Z.Wang B.L.Xiao Z.Y.Ma Shi‑Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key Laboratory of nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China nuclear Equipment Division Beijing Institute of Nuclear EngineeringChina Nuclear Power Engineering Co.Ltd.Beijing 100840China Department of Materials Science School of Mechanical EngineeringShenyang UniversityShenyang 110044China

B_(4)C/Al composites are widely utilized as neutron absorbing materials for the storage and transportation of spent nuclear *** order to improve the high-temperature mechanical properties of B_(4)C/Al composites,in-situ nano-Al_(2)O_(3.was introduced utilizing oxide on Al powder *** this study,the Al_(2)O_(3.content was adjusted by utilizing spheroid Al powder with varying diameters,thereby investigating the impact of Al_(2)O_(3.content on the tensile properties of(B_(4)C+Al_(2)O_(3.)/Al *** was found that the pinning effect of Al_(2)O_(3.on the grain boundaries could hinder the recovery of dislocations and lead to dislocation accumulation at high *** the result,with the increase in Al_(2)O_(3.content and the decrease in grain size,the high-temperature strength of the composites increased *** finest Al powder used in this investigation had a diameter of 1.4μm,whereas the resultant composite exhibited a maximum strength of 251 MPa at room temperature and 13. MPa at 3.0℃,surpassing that of traditional B_(4)C/Al composites.

关键词： Al matrix composites neutron absorbing materials (B_(4)C+Al_(2)O_(3.)/Al composites High-temperature strength

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