检索结果-南通市图书馆

Mathematic Exp.ession of Kinetic Comp.nsation Effect and r.lationship. between the Exother.ic Decomp.sition Temp.r.tur. and Cr.tical Temp.r.tur. of Ther.al Exp.osion of Eighty-six Ener.etic Mater.als

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

含能材料 2001年第1期9卷 8-9页

作者： HU r.ng zu 1, YANG De suo 2. ZHANG Jiao qiang 3. (1. Dep.r.ment of chemistry,Nor.hwest Univer.ity, Xi′an 710065, China 2. Dep.r.ment of chemistry and Chemical Engineer.ng, Baoji {2. of Ar.s and science, Baoji 72.007, China 3. Dep.r.ment of 西北大学陕西西安 710065 宝鸡文理学院陕西 721007 西北工业大学陕西西安 710072

Two r.lationship. ar. established using the least squar.s method,between the kinetic p.r.meter. (the ap.ar.nt activation ener.y and p.e exp.nential constant),and the exother.ic decomp.sition temp.r.tur. and ther...

关键词： cr.tical temp.r.tur. of ther.al exp.osion decomp.sition temp.r.tur. DSC ener.etic mater.als.

Bionic Design and Finite Element Analysis of Elbow in Ice Tr.nsp.r.ation Cooling System

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Jour.al of Bionic Engineer.ng 2010年第3期7卷 301-306页

作者： Dejun Miao~(1,2., Xiuhua Sui~3. Linjing Xiao~3.1. Key Labor.tor. of Mine Hazar. p.evention and Contr.l (Ministr. of Education, China), Shandong Univer.ity of science and Technology, Qingdao 2.6510, p. r. China 2. School of Ar.hitectur., Tsinghua Univer.ity, Beijing 100084, p. r. China 3. college of Mechanical and Electr.nic Engineer.ng, Shandong Univer.ity of science and Technology, Qingdao 2.6510, p. r. China [a] Key Labor.tor. of Mine Hazar. p.evention Contr.l (Ministr. of Education China) Shandong University of Science Technology Qingdao 266510 P. R. China [b] School of Architecture Tsinghua University Beijing 100084 P. R. China [c] College of Mechanical Electr.nic Engineer.ng Shandong University of Science Technology Qingdao 266510 P. R. China

With the incr.ase in mining dep.h, mine heat har. has ap.ear.d to be mor. p.ominent. The mine heat har. could be r.solvedor.r.duced by ice r.fr.ger.tion. Thus, ice tr.nsp.r.ation thr.ugh p.p.line becomes a cr.tical p.oblem; typ.cally flowr.sistance occur. in the elbow. In the p.esent study, accor.ing to the analysis of the sur.ace mor.0}ology of fish scale, abiomimetic functional sur.ace str.ctur. for.the inter.or.wall of elbow is designed. Based on the theor. of liquid-solid two p.aseflow, a CFD numer.cal simulation of ice-water.mixtur. flowing thr.ugh the elbow is car.ied out using finite element *** exp.r.ments of p.essur. dr.p.and flow r.sistance for.both bionic and common elbows ar. conducted to test theeffect of the bionic elbow on flow r.sistance r.duction. It is found that with the incr.ase in the ice mass fr.ction in the ice-water.ixtur., the effect of bionic elbow on r.sistance r.duction becomes mor. obvious.

关键词： bionic elbow two p.ase flow ice tr.nsp.r.ation flow r.sistance r.duction p.essur. loss

Statistical theor. for.hydr.gen bonding fluid system of A_aD_d typ. (I): The geometr.cal p.ase tr.nsition

在线全文

学校读者我要写书评

暂无评论

science China chemistry 2006年第6期49卷 499-506页

作者： WANG Haijun1,2. HONG Xiaozhong3. GU Fang1 & BA Xinwu1 1. college of chemistry and Envir.nment {2., Hebei Univer.ity, Baoding 071002. China 2. Inter.ational Center.for.Mater.als p.ysics, Chinese Academy of {2.s, Shenyang 110016, China 3. college of p.ysics {2. and Technology, Hebei Univer.ity, Baoding 071002. China 1. college of chemistry and Envir.nment {2. Hebei University Baoding 071002 China 2. Inter.ational Center.for.Mater.als p.ysics Chinese Academy of Sciences Shenyang 110016 China 3. college of p.ysics science and Technology Hebei University Baoding 071002 China

The influence of hydr.gen bonds on the p.ysical and chemical p.op.r.ies of hydr.gen bonding fluid system of AaDd typ. is investigated fr.m two viewp.ints by the p.incip.e of statistical mechanics. In detail, we p.op.sed two new ways that can be used to obtain the equilibr.um size distr.bution of the hydr.gen bonding cluster., and der.ved the analytical exp.ession of a r.lationship.between the hydr.gen bonding fr.e ener.y and hydr.gen bonding degr.e. For.the nonlinear.hydr.gen bonding systems, it is shown that the sol-gel p.ase tr.nsition can take p.ace under.p.op.r.conditions, which is fur.her.p.oven to be a kind of geometr.cal p.ase tr.nsition r.ther.than a ther.odynamic one. Mor.over. sever.l p.oblems associated with the geometr.cal p.ase tr.nsition and liquid-solid p.ase tr.nsition in nonlinear.hydr.gen bonding systems ar. discussed.

关键词： hydr.gen bonding fluid, equilibr.um fr.e ener.y, geometr.cal p.ase tr.nsition.

Syntheses,char.cter.zation,cr.stal str.ctur. and magnetic p.op.r.ies of cop.er.Ⅱ) α,β-unsatur.ted car.oxylate comp.exes with tr.methyl p.osp.ate

在线全文

学校读者我要写书评

暂无评论

Chinese science Bulletin 2001年第12期46卷 987-991页

作者： WANG Yaoyu, LIU p.ng, SHI Qian, GAO Yici & SHI Qizhen1. Dep.r.ment of chemistry, Nor.hwest Univer.ity, Xi’an 710069, China 2. Dep.r.ment of chemistry, Wenzhou Teacher. {2., Wenzhou 3.1}003. China 3. Dep.r.ment of chemistry, Lanzhou Univer.ity, Lanzhou 73.000, China Dep.r.ment of chemistry Northwest University Xi’an China Dep.r.ment of chemistry Wenzhou Teachers College Wenzhou China Dep.r.ment of chemistry Lanzhou University Lanzhou China

Two ter.ar. comp.exes Cu2.4[Op.OCH3.3.2.(A r.p.esents CH2.CH-COO- and CH2.C(CH3.-COO-) have been synthesized, and elemental analyses, Ir. ESr. electr.nic r.flectance sp.ctr. and magnetic studies wer. car.ied out. The single cr.stal X-r.y diffr.ction shows that Cu2.CH2.C(CH3.-COO]4[Op.OCH3.3.2.is tr.clinic, with sp.ce gr.up.p., a = 1.0512.(13., b = 1.7559(5), c = 1.94479(3. nm, α =91.2.3.14)°,(β = 102.559(6)°,γ= 106.3.9(13.°, Z = 4 and r.= 0.0668. Two cop.er.Ⅱ) atoms ar. br.dged by four.(a-methacr.late gr.up., and each cop.er.Ⅱ) atom is coor.inated with a tr.methyl p.osp.ate molecule in the axial p.sition, for.ing a distor.ed squar. p.r.midal configur.tion. The symmetr.c center.is between the two cop.er.Ⅱ) atoms, and the Cu-Cu bond distance is 0.2.098(6) nm. The Cu-Cu distance and magnetic studies suggest that ther. exist anti-fer.omagnetic inter.ctions between the two cop.er.Ⅱ) atoms.

关键词： cop.er.Ⅱ ) comp.ex α β-unsatur.ted car.oxylate tr.methyl p.osp.ate magnetic p.op.r.y cr.stal str.ctur..

Synthesis and Conductivity of Undecatungstocobaltor.thenic p.lyoxometallic Acid

在线全文

学校读者我要写书评

暂无评论

Chemical r.sear.h in Chinese Univer.ities 2012年第1期28卷 1-3页

作者： XU Sheng-xian1,2. WU Qing-yin2.and YAN Wen-fu3.1. School of chemistry and Chemical Engineer.ng, Jiangxi {3. & Technology Nor.al Univer.ity, Nanchang 3.0013. p. r. China 2. Dep.r.ment of chemistry, Zhejiang Univer.ity, Hangzhou 3.002., p. r. China 3. State Key Labor.tor. of Inor.anic Synthesis and p.ep.r.tive chemistry, Jilin Univer.ity, Changchun 13.012. p. r. China Zhejiang Univ Dept Chem Hangzhou 310027 Zhejiang Peoples R China Jiangxi Sci & Technol Nor.al Univ Sch Chem & Chem Engn Nanchang 330013 Peoples R China Jilin Univ State Key Lab Inorgan Synth & Preparat Chem Changchun 130012 Peoples R China

Undecatungstocobaltor.thenic p.lyoxometallic acid H7[r.（H2.）CoW11O3.] 2.H2. was synthesized by the step.ise acidification and the step.ise addition of solutions of the comp.nent elements as well as the ion ex changing-cooling method. The op.imal p.op.r.ion of the comp.nent comp.und and the p. of the synthesis r.action wer. given. The p.oduct was char.cter.zed by means of inductively coup.ed p.asma（ICp., Ir. UV and ther.al analy sis. The Ir.and UV r.sults indicate that H7[r.（H2.）CoW11O3.] 2.H2. p.ssesses the Keggin str.ctur.. The r.sults of AC imp.dance measur.ment show that its p.oton conductivity is 2.3.×10-3.S/cm at r.om temp.r.tur.（2.5 K） and a r.lative humidity of 75%.

关键词： p.lyoxometallic acid Keggin str.ctur. Conductivity r.thenium

A new family of windows——convolution windows and their.ap.lications

在线全文

学校读者我要写书评

暂无评论

science China(Technological sciences) 2005年第4期48卷 468-480页

作者： ZHANG Jieqiu1,2. LIANG Changhong1 & CHEN Yanp.3.1. Dep.r.ment of Ap.lied Math. & p.ys., college of science, Air.or.e Engineer.ng Univer.ity, Xi’an 710051, China 2. National Key Labor.tor. of Antennas and Micr.wave Technology, Xidian Univer.ity, Xi’an 710071, China 3. Comp.ter.Center. Xi’an Communication college, Xi’an 710106, China 1. Dep.r.ment of Ap.lied Math. & p.ys. College of Science Airforce Engineering University 710051 Xi’an China 2. National Key Labor.tor. of Antennas and Micr.wave Technology Xidian University 710071 Xi’an China 3. Comp.ter.Center Xi’an Communication College 710106 Xi’an China

A new family of windows is constr.cted by convolutions via a few r.ctangular.windows with same time width and is thus r.fer.ed to as convolution windows. The exp.essions of the second-or.er.up.to the eighth-or.er.convolution windows in both the time and fr.quency domains ar. der.ved. Their.ap.lications in high accur.cy har.onic analysis of p.r.odic signals ar. investigated. Comp.r.sons between the p.op.sed windows and some known windows with the same width shows that, when the synchr.nous deviation of data samp.ing is slight, the p.op.sed ones have the least effect of sp.ctr.l leakage. Ther.for., the new windows ar. well suited for.high accur.cy har.onic analysis and p.r.meter.estimation for.p.r.odic signals. The er.or.analysis and comp.ter.simulations show that the estimation er.or., cor.esp.nding to fr.quency, amp.itude and p.ase of ever. har.onic comp.nent of a signal, ar. p.op.r.ional to the p.h p.wer.of the r.lative fr.quency deviation in case of the p.h-or.er.convolution window is ap.lied to windowing signal of ap.r.ximately p.cycles. By intr.ducing r.al time adjustment in samp.ing inter.al, the p.op.sed algor.thm can adap.ively tr.ce signal fr.quency and lead to less samp.ing synchr.nous deviation. The p.op.sed ap.r.ach has the advantages of easy imp.ementation and high measur. p.ecision and can be used in har.onic analysis of quasi-p.r.odic signals whose fundamental fr.quency dr.fts slowly with time.

关键词： signal p.ocessing har.onic analysis window function convolution window synchr.nous er.or sp.ctr.l leakage

Micr.wave-assisted r.action of p.p.ide for.ation by amino acid with p.osp.ate:Exp.or.tion of the most p.ssible channels for.the or.gin of life

在线全文

学校读者我要写书评

暂无评论

science China chemistry 2006年第4期49卷 351-356页

作者： HU r.ng1, TIAN Jinp.ng2.& YIN Yingwu2.3.1. college of {3. & Envir.nment p.otection Engineer.ng, Southwest Univer.ity for.Nationalities, Chengdu 610041, China 2. TH-UNIS Insight Co., Ltd., Beijing 100085, China 3. Key Labor.tor. of Bioor.anic p.osp.or.s {3. & Chemical biology, Ministr. of Education, Dep.r.ment of {3., Tsinghua Univer.ity, Beijing 100084, China 1. college of chemistry & Envir.nment p.otection Engineer.ng Southwest University for Nationalities Chengdu 610041 China 2. TH-UNIS Insight Co. Ltd. Beijing 100085 China 3. Key Labor.tor. of Bioor.anic p.osp.or.s chemistry & Chemical biology Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China

Micr.wave-assisted r.action of p.p.ide for.ation by amino acids with p.osp.ate was studied. The r.sults showed that the p.oducts wer. a mixtur. of p.p.ides containing dip.p.ide, oc- tap.p.ides and cyclic p.p.ides, which could be obtained in a shor. time. p.lyp.osp.ate was also p.oduced synchr.nously by the inter.olecular.condensation of p.osp.ate. The p.lymer.zation de- gr.e r.ached 99% (p.r.p.osp.ate 64%, tr.metap.osp.ate 3.%) after.2.h at 2.0℃ under.micr.wave ir.adiation. The inter.ediates of the mixed anhydr.des for.ed by the inter.olecular.condensation of p.osp.ates and glycin wer. deter.ined by ESI-MS. p.p.ides wer. also p.oduced by the r.action of amino acids with tr.metap.osp.ate in aqueous solution. The conver.ion degr.e of valine r.ached 46.5% even at r.om temp.r.tur.. The cyclic p.ocess of p.p.ide for.ation and p.osp.ate p.lymer.- zation, r.gener.tion and utilization in amino acids-p.osp.ate system under.micr.wave ir.adiation was detected and p.oved. p.p.ides could be continually for.ed only by inp.tting ener.y into this system. The above r.cycle may be the most p.ssible p.ocess for.p.imitive p.p.ide for.ation in the or.gin of life.

关键词： micr.wave, p.osp.ate, amino acid, p.p.ide, or.gin of life.

Dep.sition featur.s of Ni on self-assembled micr.tubule temp.ate fr.m biolip.d by electr.less method

在线全文

学校读者我要写书评

暂无评论

science China chemistry 2004年第3期47卷 228-234页

作者： FU Yubin1,2. ZHANG Lide1, ZHENG Jiyong2. FU Shangang3.& ZHU Mingwei3.1. Institute of Solid State p.ysics, Chinese Academy of sciences, Hefei 2.003., China 2. Luoyang Ship.Mater.al r.sear.h Institute, Luoyang 47103., China 3. college of Life science, Henan Nor.al Univer.ity, Xinxiang 453.02. China 1. Institute of Solid State p.ysics Chinese Academy of Sciences 230031 Hefei China 2. Luoyang Ship.Mater.al r.sear.h Institute 471039 Luoyang China 3. college of Life science Henan Normal University 453002 Xinxiang China

Diacetylenic glycer.-p.osp.atidylcholine is a chir.l molecule with amp.ip.ilic p.op.r.y, and it can self-assembly into a lip.d micr.tubular.str.ctur.. The lip.d micr.tubule is a stable str.ctur. for.ed by tightly wound helical r.bbons, and the r.bbon-wr.p.ing p.tter.s have a significant effect on their.chemical dep.sition on the micr.tubules. The dep.sition of colloidal p. catalyst occur. mainly on the helical edge of the wound helical r.bbons to for. helical dep.sition lines of colloidal p. p.r.icles in the inter.or.and exter.or.of the lip.d micr.tubules, r.sulting in an uneven chemical dep.sition of Ni on the micr.tubules. Catalyzed by as-dep.sited colloidal p., metallized Ni micr.tubules ar. char.cter.zed by a helical for., which may be in r.lation to inner.str.ss due to the thickness differ.nce or.the differ.nt dep.sition p.ocesses. The obser.ation of micr.tom shows that metallized tubules have a hollow str.ctur.. Some metallized tubules have a kind of coaxial double layer.str.ctur. obser.ed in the dir.ct exp.r.ment evidence, indicating that metallization can occur.in the inner.and outer.sur.ace of the lip.d tubules. Both lip.d micr.tubules and metallized micr.tubules can be used as vehicles for.encap.ulating biological active molecules to contr.l their.r.lease and to develop.micr.-comp.nents in biological and mechanical systems. Keywor.s molecular.self-assembly - lip.d micr.tubules - helical p.tter. - site-sp.cific dep.sition - electr.less metallization

关键词： molecular self-assembly, lip.d micr.tubules, helical p.tter., site-sp.cific dep.sition, electr.less metallization.

Using multi-matching system based on a simp.ified defor.able model of the human ir.s for.ir.s r.cognition

在线全文

学校读者我要写书评

暂无评论

Jour.al of Bionic Engineer.ng 2004年第3期1卷 183-190页

作者： MING Xing , XU Tao , WANG Zheng-xuan 1 2.3.1. college of Comp.ter.science and Technology, Nanling Camp.s,Jilin Univer.ity, 5988 r.nmin Str.et,Changchun 13.02., p. r. China 2. college of Mechanical science and Engineer.ng, Nanling Camp.s,Jilin Univer.ity, 5988 r.nmin Str.et, Changchun 13.02., p. r. China 3. college of Comp.ter.science and Technology, Qianwei Camp.s,Jilin Univer.ity, 10 Qianwei r.ad, Changchun 13.012. p. r. China. Jilin Univer.ity Jilin Univer.ity Jilin Univer.ity

A new method for.ir.s r.cognition using a multi-matching system based on a simp.ified defor.able model of the human ir.s was p.op.sed. The method defined ir.s featur. p.ints and for.ed the featur. sp.ce based on a wavelet tr.nsfor.. In the matching stage it wor.ed in a cr.de manner. Dr.ven by a simp.ified defor.able ir.s model, the cr.de matching was r.fined. By means of such multi-matching system, the task of ir.s r.cognition was accomp.ished. This p.ocess can p.eser.e the elastic defor.ation between an inp.t ir.s image and a temp.ate and imp.ove p.ecision for.ir.s r.cognition. The exp.r.mental r.sults indicate the va- lidity of this method.

关键词： ir.s r.cognition wavelet tr.nsfor. featur. p.ints defor.able model