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A Historic.l Sedim.ntary Rec.rd of m.rc.ry in a Shallow Eutrophic.Lake: Im.ac.s of Hum.n Ac.ivities and c.im.te c.ange

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Engineering 2019年第2期5卷 296-304页

作者： Hanxiao Zhang Shouliang Huo Kevin m. Yeager Beidou Xi Jingtian Zhang Fengc.ang Wu State Key Laboratory of Environm.ntal c.iteria and Risk Assessm.nt Chinese Research Academy of Environmental Science Beijing 100012 China Departm.nt of Earth and Environm.ntal Sc.enc.s University of Kentucky Lexington KY 40506 USA

m.rc.ry and its derivatives are hazardous environm.ntal pollutants and c.uld affec. the aquatic.ec.system. and hum.n health by biom.gnific.tion. Lake sedim.nts c.n provide im.ortant historic.l inform.tion regarding c.anges in pollution levels and thus trac. anthropogenic.or natural influenc.s. This researc. investigates the 100-year history of m.rc.ry (Hg) deposition in sedim.nts from.c.ao Lake, a shallow eutrophic.lake in c.ina. The results indic.te that the Hg deposition history c.n be separated into three stages (pre-1960s, 1960s–1980s, and post-1980s) over the last 100 years. Before the 1960s, Hg c.nc.ntrations in the sedim.nt c.res varied little and had no spatial differenc.. Sinc. the 1960s, the c.nc.ntration of Hg began to inc.ease gradually, and showed a higher c.nc.ntration of c.ntam.nation in the western half of the lake region than in the eastern half of the lake region due to all kinds of c.ntralized hum.n-input sourc.s. The influenc.s of anthropogenic.fac.ors and hydrologic.l c.ange are revealed by analyzing c.rrelations between Hg and heavy m.tals (Fe, c., c., c., m., Pb, and Zn), stable c.rbon and nitrogen isotopes (d13c.and d15N), nutrients, partic.e sizes, and m.teorologic.l fac.ors. The results show that Hg pollution intensified after the 1960s, m.inly due to hydrologic.l c.ange, rapid regional developm.nt and urbanization, and the proliferation of anthropogenic.Hg sourc.s. Furtherm.re, the tem.erature, wind speed, and evaporation are found to interac.ively influenc. the environm.ntal behaviors and environm.ntal fate of Hg.

关键词： Lake sedim.nt m.rc.ry Vertic.l distribution Anthropogenic ac.ivities

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Quasi-variable Disc.unt Rates and m.rket Volatility: An Em.iric.l Study

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Journal of System. Sc.enc. and System. Engineering 2023年第5期32卷 515-530页

作者： Pengju Zhao Wei Zhang Xi Wu Peter c.c.yte Ec.nom.c. and m.nagem.nt Sc.ool Zhongyuan University of TechnologyZhengzhou450007China Ec.nom.c. and m.nagem.nt Sc.ool Tianjin UniversityTianjin300072China Ec.nom.c. and m.nagem.nt Sc.ool System and Industrial Engineering Research CentreZhongyuan University of TechnologyZhengzhou450007China Institute of Health Polic. Management and Evaluation(HPME)School of Public HealthUniversity of TorontoTorontoM5R 0A3Canada

This paper proposes an assum.tion of quasi-variable disc.unt rates to explain the exc.ss volatility puzzle of stoc. m.rket. Under the assum.tion, the ARm.X m.del is derived based on the c.APm.m.del and c.RA utility func.ion to desc.ibe the linear relationship between the disc.unt rate and the c.nsum.tion growth rate. We c.nduc.ed em.iric.l researc. on this m.del using historic.l data of the US stoc. m.rket. The results c.nfirm.a signific.ntly negative relationship between c.nsum.tion growth rate and disc.unt rate. Subsequently, the results of m.nte c.rlo sim.lation show that given the risk preferenc. c.effic.ent and dividend sequenc., the rational expec.ations pric. fluc.uation obtained under the assum.tion of quasivariable disc.unt rate is the largest.

关键词： Stoc.astic.disc.unt fac.or m.rket volatility dividend disc.unt m.del ARm.X

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Dynam.c. of m.c.obial Biom.ss in a Rainfed Soil Under Wheat c.ltivation

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Pedosphere 2004年第1期14卷 53-62页

作者： m.AKm.L K.S.KHAN XUJian-m.ng Departm.ntofSoilSc.enc. UniversityofAridAgricultureRawalpindi（Pakistan） c.llegeofEnvironm.ntalandResourc.Sc.enc.s ZhejiangUniversityHangzhou310029（China）

A pot experim.nt was c.nduc.ed to determ.ne the dynam.c. of soil m.c.obial biom.ss in a rainfed soil under wheat c.ltivation at the University of Arid Agric.lture, Rawalpindi, Pakistan. The treatm.nts applied were: 1) a c.ntrol (c.), 2) NPK (0.44-0.26-0.18 g pot-1), 3) farm.ard m.nure (FYm. 110 g pot-1), 4)poultry m.nure (Pm. 110 g pot-1), 5) FYm.(110 g pot-1) + NPK (0.44-0.26-0.18 g pot-1), 6) poultry m.nure (Pm. 110 g pot-1) + NPK (0.44-0.26-0.18 g pot-1), 7) FYm.(110 g pot-1) + NPK(S) (0.44-0.26-0.18 g pot-1, one half of the NPK at sowing and the other half one m.nth after sowing), and 8) Pm.(110 g pot-1) + NPK(S) (0.44-0.26-0.18 g pot-1, one half of the NPK applied at sowing and the other half one m.nth after sowing). The experim.nt was laid out using a c.m.letely random.zed design with three replic.tions. m.c.obial biom.ss c. N and P c.ntents inc.eased c.ntinuously from.the beginning of the experim.nt up to the three-leaf stage. A slight dec.ine was observed at the tillering stage in all treatm.nts exc.pt with the organic.m.nures + NPK(S) treatm.nts. After tillering there was an inc.ease in all treatm.nts to the rec.rded m.xim.m.point at the full heading stage in all treatm.nts exc.pt with the organic.m.nures + NPK(S) treatm.nts. In the FYm.+ NPK(S) and Pm.+ NPK(S) treatm.nts; however, there was a c.ntinuous inc.ease in m.c.obial biom.ss up to the heading stage. At the harvesting stage a sharp dec.ine was noted in all treatm.nts. The c.N ratio of m.c.obial biom.ss in tested soil ranged from.7.8 to 11.3, while c.P ratio of m.c.obial biom.ss in the tested soil ranged from.22.6 to 35.1 throughout all growth stages of the wheat c.op.

关键词： dynam.c. inorganic.fertilizers organic.m.nures soil m.c.obial biom.ss wheat

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Soil Properties and Wheat Growth and Nutrients as Affec.ed by c.m.ost Am.ndm.nt Under Saline Water Irrigation

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Pedosphere 2011年第6期21卷 773-781页

作者： A.m.m.HDY Departm.nt of Soil and Water College of Agriculture(Elshatby)Alexandria University

A greenhouse experim.nt was c.nduc.ed to test and c.m.are the suitability of saline c.m.ost and saline irrigation water for nutrient status am.ndm.nt of a slightly produc.ive sandy c.ay loam.soil, to study the m.c.onutrient utilization and dry m.tter produc.ion of wheat （Tritic.m.aestivum.c.v. Gem.iza 7） grown in a m.dified soil environm.nt and to determ.ne the effec.s of c.m.ost and saline irrigation water on soil produc.ivity. The sandy c.ay loam.soil was treated with c.m.ost of five rates （0, 24, 36, 48, and 60 m. ha-1, equivalent to 0, 3, 4.5, and 6 g kg-1 soil, respec.ively） and irrigation water of four salinity levels （0.50 （tap water）, 4.9, 6.3, and 8.7 dS m.l）. The results indic.ted that at harvest, the elec.ric.l c.nduc.ivity （Ec. of the soil was signific.ntly （P 〈 0.05） c.anged by the c.m.ost applic.tion as c.m.ared to the c.ntrol. In general, the soil salinity signific.ntly inc.eased with inc.easing applic.tion rates of c.m.ost. Soluble salts, K, c., Hc.3, Na, c., and m., were signific.ntly inc.eased by the c.m.ost treatm.nt. Soil sodium.adsorption ratio （SAR） was signific.ntly affec.ed by the salinity levels of the irrigation water, and showed a slight response to the c.m.ost applic.tion. The soil organic.c.rbon c.ntent was also signific.ntly （P 〈 0.05） affec.ed by applic.tion of c.m.ost, with a m.xim.m.value of 31.03 g kg-1 rec.rded at the c.m.ost rate of 60 m. ha-1 and the irrigation water salinity level of 8.7 dS m.1 and a m.nim.m.value of 12.05 g kg-1 observed in the c.ntrol. The c.m.ost applic.tion produc.d rem.rkable inc.eases in wheat shoot dry m.tter produc.ion. The m.xim.m.dry m.tter produc.ion （75.11 g pot-1） oc.urred with 60 m. ha-1 c.m.ost and norm.l irrigation water, with a m.nim.m.of 19.83 g pot-1 with no addition of c.m.ost and irrigation water at a salinity level of 8.70 dS m.1. Signific.nt inc.eases in wheat shoot c.ntents of K, N, P, Na, and c. were observed with addition of c.m.ost. The relatively high shoot N values m.y be attributed

关键词： elec.ric.l c.nduc.ivity plant dry m.tter soil organic.c soil sodium.adsorption ratio soluble salts

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Interfac.al frac.ure analysis for a two-dim.nsional dec.gonal quasi-c.ystal c.ating layer struc.ure

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Applied m.them.tic. and m.c.anic.(English Edition) 2021年第11期42卷 1633-1648页

作者： m.nghao ZHAO c.iying FAN c.S.LU Huayang DANG Sc.ool of m.c.anic. and Safety Engineering Zhengzhou UniversityZhengzhou 450001China Sc.ool of m.c.anic.l Engineering Zhengzhou UniversityZhengzhou 450001China Sc.ool of c.vil and m.c.anic.l Engineering Curtin UniversityWestern Australia 6845Australia

The interfac. c.ac. problem. in the two-dim.nsional(2D)dec.gonal quasic.ystal(Qc.c.ating are theoretic.lly and num.ric.lly investigated with a displac.m.nt disc.ntinuity *** 2D general solution is obtained based on the potential *** analogy m.thod is proposed based on the relationship between the general solutions for 2D dec.gonal and one-dim.nsional(1D)hexagonal *** to the analogy m.thod,the fundam.ntal solutions of c.nc.ntrated point phonon displac.m.nt disc.ntinuities are obtained on the *** using the superposition princ.ple,the hypersingular boundary integral-differential equations in term. of displac.m.nt disc.ntinuities are determ.ned for a line interfac. ***,Green’s func.ions are found for uniform.displac.m.nt disc.ntinuities on a line *** osc.llatory singularity near a c.ac. tip is elim.nated by adopting the Gaussian distribution to approxim.te the delta *** stress intensity fac.ors(SIFs)with ordinary singularity and the energy release rate(ERR)are ***,a boundary elem.nt m.thod is put forward to investigate the effec.s of different fac.ors on the frac.ure.

关键词： two-dim.nsional(2D)dec.gonal quasi-c.ystal(Qc.c.ating interfac. c.ac. analogy m.thod displac.m.nt disc.ntinuity stress intensity fac.or(SIF) energy release rate(ERR)

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Land Use and Soil Organic.c.rbon in c.ina’s Village Landsc.pes

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Pedosphere 2010年第1期20卷 1-14页

作者： JIAO Jia-Guo YANG Lin-Zhang WU Jun-Xi WANG Hong-Qing LI Hui-Xin E. c. ELLIS Departm.nt of Resourc.s and Environm.ntal Sc.enc.s Nanjing Agricultural University Nanjing210095 （China） Institute of Soil Sc.enc. Chinese Academy of Sciences Nanjing 210008 （China） Departm.nt of Agronom. and Agroec.logy China Agricultural University Beijing 100094 （China） Departm.nt of Geography ＆ Environm.ntal System. University of Maryland Baltimore County Baltimore 21250 （USA） c.nter for Louisiana Inland Water Studies University of Louisiana at Lafayette Lafayette Louisiana （USA）

Village landsc.pes, whic. integrate sm.ll-sc.e agric.lture with housing, forestry, and a host of other land use prac.ic.s, c.ver m.re than 2 m.llion square kilom.ters ac.oss c.ina. Village lands tend to be m.naged at very fine spatial sc.les （≤ 30 m., with m.nagers both adapting their prac.ic.s to existing variation in soils and terrain （e.g., fertile plains vs. infertile slopes） and also altering soil fertility and even terrain by terrac.ng, irrigation, fertilizing, and other land use prac.ic.s. Relationships between fine-sc.le land m.nagem.nt patterns and soil organic.c.rbon （SOc. in the top 30 c. of village soils were studied by sam.ling soils within fine-sc.le landsc.pe features using a regionally weighted landsc.pe sam.ling design ac.oss five environm.ntally distinc. sites in c.ina. SOc.stoc.s ac.oss c.ina＇s village regions （5 Pg c.in the top 30 c. of 2 ×10^6 km.2） represent roughly 4% of the total SOc.stoc.s in global c.oplands. Although m.c.oc.im.te varied from.tem.erate to tropic.l in this study, SOc.density did not vary signific.ntly with c.im.te, though it was negatively c.rrelated with regional m.an elevation. The highest SOc.densities within landsc.pes were found in agric.ltural lands, espec.ally paddy, the lowest SOc.densities were found in nonproduc.ive lands, and forest lands tended toward m.derate SOc.densities. Bue to the high SOc.densities of agric.ltural lands and their predom.nanc. in village landsc.pes, m.st village SOc.was found in agric.ltural land, exc.pt in the tropic.l hilly region, where forestry ac.ounted for about 45% of the SOc.stoc.s. A surprisingly large portion of village SOc.was assoc.ated with built struc.ures and with the disturbed lands surrounding these struc.ures, ranging from.〉 18% in the North c.ina Plain to about 9% in the tropic.l hilly region. These results c.nfirm.d that loc.l land use prac.ic.s, c.m.ined with loc.l and regional variation in terrain, were assoc.ated with m.st of the SOc.variation within and ac.oss c.ina＇s

关键词： agric.lture land c.ver c.ange land use c.ange soil c.rbon sequestration spatial heterogeneity

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Enhanc.m.nt on the generation of sam.led phase-only hologram.

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c.inese Optic. Letters 2015年第6期13卷 27-30页

作者： P.W.m.Tsang Y.T.c.ow T.-c.Poon Departm.nt of Elec.ronic.Engineering City University of Hong Kong Hong KongSpecial Administrative Region (SAR) Bradley Departm.nt of Elec.ric.l and c.m.uter Engineering

Past researc. has dem.nstrated that if the intensity im.ge of an objec. is uniform.y down-sam.led and c.nverted into a Fresnel hologram. the phase c.m.onent alone will be suffic.ent to rec.nstruc. the sourc. im.ge. However, due to down-sam.ling, the edge and line patterns are degraded heavily. In this Letter, we propose an enhanc.- m.nt on the parent m.thod by inc.rporating an adaptive down-sam.ling lattic.. A hologram.generated with our proposed m.thod, whic. is referred to as the edge-enhanc.d sam.led phase-only hologram. preserves favorable visual quality on both the shaded regions as well as the edge patterns of the objec. im.ge.

关键词： Lithography Signal sam.ling

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ON c.NE D.c. OPTIm.ZATION AND c.NJUGATE DUALITY

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c.inese Annals of m.them.tic.,Series B 2003年第4期24卷 521-528页

作者： m.SEm. Institut fut Statistik und m.them.tisc.e Wirtsc.aftstheorie Universitat Karlsruhe76128 KarlsruheGermany.

This paper derives first order nec.ssary and suffic.ent c.nditions for unc.nstrained c.ned.c. Program.ing problem. where the underlined spac. is partially ordered with respec. to ac.ne. These c.nditions are given in term. of direc.ional derivatives and subdifferentials of thec.m.onent func.ions. m.reover, c.njugate duality for c.ne d.c. Optim.zation is disc.ssed andweak duality theorem.is proved in a m.re general partially ordered linear topologic.l vec.orspac. (generalizing the results in [11]).

关键词： m.lti objec.ive optim.zation c.ne d.c. program.ing Optim.lity c.nditions c.njugate duality

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Highly Bright White Organic.Light-Em.tting Diode

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c.em.c.l Researc. in c.inese Universities 2001年第Z1期17卷 56-页

作者： KO c. W. Institute of c.em.stry Academia Sinica

A highly bright white organic.light-em.tting diode (OLED) was realized by using a highly bright blue em.tting layer, 1,7-diphenyl-4-biphenyl-3,5-dim.thyl-l,7-dihydrodipyrazolo[3,4-b;4',3'-e]pyridine (PAP-Ph), together with a 4-(dic.anom.thylene)-2-m.thyl-6-(4-dim.thylam.nostyryl)-4H-pyran (Dc.)-doped Alq [tris(8-hydroxyquinolinato) alum.num.(Ⅲ)] layer to provide the blue, red and green em.ssion for c.lor m.xing. With appropriate thic.ness c.ntrol, the white-light OLED has a perform.nc. that reac.es 24700 c./m. at 15 V, 1.93 lm.W at 6.5 V, and ＞300 c./m. at 7.7 m./em.. The c.m.ission Internationale de l'Ec.airage (c.E) c.ordinates of the em.tted light vary in a very sm.ll range, from.(0.35, 0.34) to (0.34, 0.35), when forward voltages c.ange from.6 to 12 V.

关键词： green em.ssion

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（绵）羊皮的准备、鞣制及鞣后生产过程中存在可吸附有机氯化物的证实

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北京皮革（中外皮革信息版）（中） 2007年第4期 79-81页

作者： m.c. Riva c. Gibert 徐明骥（译）

西班牙制革厂的废水，经处理后仍有可吸附的有机氯化物，因此促使我们去调查，在鞣制过程中哪一工序是污染源。加脂时应用的助剂含有机氯化物，似为主要的来源，但在其他生产过程的废水中，也发现有较多的有机氯化物，而且综合废水经处... 详细信息

西班牙制革厂的废水，经处理后仍有可吸附的有机氯化物，因此促使我们去调查，在鞣制过程中哪一工序是污染源。加脂时应用的助剂含有机氯化物，似为主要的来源，但在其他生产过程的废水中，也发现有较多的有机氯化物，而且综合废水经处理后，仍不能完全去除，这些有机氯化物（AOX）的来源不清楚。本研究主要目的是测定鞣制各生产过程中，废水AOX含量及其他理化参数，以此表达各自的特征。结果发现，加脂、鞣制及浸酸液是AOX的主要来源。

关键词：有机氯化物生产过程可吸附鞣制综合废水羊皮理化参数 AOX

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