Performance of Feedback BP Networks

ＰｅｒｆｏｒｍａｎｃｅｏｆＦｅｅｄｂａｃｋＢＰＮｅｔｗｏｒｋｓ￥ＬｕｏＳｉｗｅｉ；ＹａｎｇＷｕｊｉｅ＆ＺｈａｎｇＡｉｊｕｎ（Ｄｅｐｔ．ｏｆＣｏｍｐｕｔｅｒＳｃｉｅｎｃｅ＆Ｔｅｃｈｎｏｌｏｇｙ．ＮｏｒｔｈｅｒｎＪｉａｏｔｏｎｇＵｎｉｖｅｒｓｉｔｙ，Ｂｅ...     

Artificial Neural Network for Combining Forecasts

ＡｒｔｉｆｉｃｉａｌＮｅｕｒａｌＮｅｔｗｏｒｋｆｏｒＣｏｍｂｉｎｉｎｇＦｏｒｅｃａｓｔｓ￥ＳｈａｎｍｉｎｇＳｈｉ，ＬｉＤ．Ｘｕ＆ＢａｏＬｉｕ（ＤｅｐａｒｔｍｅｎｔｏｆＣｏｍｐｕｔｅｒＳｃｉｅｎｃｅ，ＵｎｉｖｅｒｓｉｔｙｏｆＣｏｌｏｒａｄｏａｔＢｏｕｌ...     

Failure of opioids to affect excitation and contraction in isolated ventricular heart muscle

Summary The opioid agonists morphine (selective for -receptors) and ethylketocyclazocine (selective for kappa-receptors), at concentrations evoking strong effects in neuronal structures, did not significantly affect the configuration of the intracellularly recorded action potential and the force of contraction in ventricular heart muscle isolated from guinea pigs, rabbits and man. These results suggest that any changes of heart functions in vivo in response to opioid-like drugs are probably not mediated postsynaptically at the myocardial cell membrane but rather presynaptically, influencing the release of noradrenaline and/or acetylcholine from the nerve terminals.     

Immunogenetics

Summary The 1985 Catalog of Mapped Genes (Human Gene Mapping 8; 33) has been used to pick out the known, immunologically important genes; these are then discussed in the following order: 1. genes controlling organs, tissues and cells of the immune apparatus, 2. genes determining self structures, 3. genes determining the structures of immunological specificity, 4. genes determining substances with immunoregulatory and effector properties. The symbols for the genes and the biological functions of their products are explained. The genetics of the ABO blood groups, of the HLA-system and of antibody formation are given in rather more detail.     

MD Method in Solving Multiple Criteria Decision Problems Arising from Investment Systems

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NOVELL局域网的操作使用维护经验点滴

介绍了ＮＯＶＥＬＬ网络的操作维护技巧．     

Solutions of Two-point BVP in Banach Spaces

IntroductionGuoetal.[1]discussedthetwo-pointboundaryvalueproblem(BVP)forordinarydifferentialequationsinBanachspaces,-u″=f(t,u),　t∈I=[0,1]u(0)=u(1)=0andgavesomeconclusions.Usingthemonotoneiterationtechnique,SongFumindiscussedthesameBVP[1]andshoweditsmaximalandminimalsolutions[2].Inmoregeneralboundaryvaluecondi-tions,GuoandSun[3]discussedBVPinreflexiveBanachspacesandmadeseveralconclusions.InthisworkthefollowingBVPinrealBanachspace,E,isconsidered.Lu(-p(t)u′)′ q(t)u=f(t,u),B0uau(0)-…     

医院信息管理系统业务量估算与网络流量控制

本文介绍医院信息管理系统组成与设计要求;讨论了信息系统业务量估算,网络流量控制方法,保证信息管理系统数据有效性,快速存储,共享使用与安全可靠性。     

Biology of halophilic bacteria,Part II

Archaebacteria (archaea) are comprised of three groups of prokaryotes: extreme halophiles, methanogens and thermoacidophiles (extreme thermophiles). Their membrane phospholipids and glycolipids are derived entirely from a saturated, isopranoid glycerol diether,sn-2,3-diphytanylglycerol (archaeol) and/or its dimer, dibiphytanyldiglyceroltetraether (caldarchaeol). In extreme halophiles, the major phospholipid is the archaeol analogue of phosphatidylglycerolmethylphosphate (PGP-Me); the glycolipids are sulfated and/or unsulfated glycosyl archaeols with diverse carbohydrate structure characteristic of taxons on the generic level. Biosynthesis of these archaeol-derived polar lipids occurs in a multienzyme, membrane-bound system that is absolutely dependent on high salt concentration (4 M). The highly complex biosynthetic pathways involve intermediates containing glycerol ether-linked C₂₀-isoprenyl groups which are reduced to phytanyl groups to give the final saturated polar lipids. In methanogens, polar lipids are derived both from archaeol and caldarchaeol, and thermoacidophiles contain essentially only caldarchaeol-derived polar lipids. The function of these membrane polar lipids in maintaining the stability, fluidity and ionic properties of the cell membrane of extreme halophiles, as well as the evolutionary implications of the archaeol and caldarchaeol-derived structures will be discussed.     

累次成像光学系统模型的建立及应用

分析了物在任意位置且两次以上累次成像这一问题，利用透镜成像的基本公式对之建立了数学模型，并归纳出应用该模型设计光学系统的一般步骤．