陕西镇安黄家湾早更新世哺乳动物群及其伴生植物

记述了发现于陕西镇安黄家湾早更新世晚期的一个大型哺乳动物群。动物群包括哺乳动物4目、11科、24种,它们是：Canis variabilis, Hyaenidae gen. et sp. indet. , Homotherium sp. , Megantereon sp. , Lynx cf. shansius , Panthera pardus , Elephantidae gen. et sp. indet. , Equus qingyangensis , Hesperotherium sinense , Ancylotherium sp. , Megatapirus augustus, Rhinocerotidae gen. et sp. indet. , Dicerorhinus lantianensis, Sus sp. , Moschus moschi ferus , Cervus unicolor , Cervus sp. 1, Cervus sp. 2, Hydropotes sp. , Capreolus sp. , Strepsiceros annectens , Leptobos sp. , Bubalus sp. 和 Budorcas taxicolor等。动物群伴生植物孢粉分析表明,当时在化石产地生长着下列植物：Selaginella sp. , Pinaceae gen. et sp. indet. , Picea sp. , Cotinus coggygria , Juglans regia , Quercus sp. , Myrica rubra , Meliaceae gen. et sp. indet. , Celtis sp. , Oleaceae ( Syringa sp. ?) gen. et sp. indet. , Chenopodiaceae gen. et sp. indet. ,Kobresia sp. , Scrophulariaceae gen. et sp. indet. , Humulus sp. , Gramineae gen. et sp. indet. , Ranunculaceae gen. et sp. indet. , Sparganium sp. ,Celastraceae gen. et sp. indet. ,Elaeagnaceae gen. et sp. indet. ,Compositae gen. et sp. indet. ,Aremisia sp. , Xanthium sibiricum 和Carex sp.等。分析了动物群生活时栖息地的气候、植被和地貌特征,结果表明,动物群栖息在温暖、湿润、有森林、灌丛草地并富有水体的生境中,当时秦岭腹地存在着相当开阔的河谷地带,山势没有现在这么险峻,因此阻断秦岭南北动物交流的天然屏障当时可能还未真正形成,秦岭南北两侧的动物可以沿着开阔的河谷地带随季节和气候的变化互相扩散迁移。     

西藏嵩草属（莎草科）的修订

在标本观察和野外调查的基础上,对西藏的嵩草属Kobresia植物进行了分类学修订,共确认了36种和1亚种。更正了6个类群的学名,它们正确的名称是K. esenbeckii,K. fissiglumis,K. gammiei,K. littledalei,K. myosuroides ssp. bistaminata和K. vaginosa。有13个名称,即K. angusta,K. cercostachys var. capillacea,K. clarkeana,K. curticeps var. gyirongensis,K. deasyi,K. glaucifolia,K. hookeri,K. nudicarpa,K. prainii var. elliptica,K. seticulmis,K. stenocarpa,K. stenocarpa var. simplex和K. williamsii处理为异名,其中K. prainii var. elliptica,K. glaucifolia和K. stenocarpa var. simplex为新异名。发现了西藏分布的一个新记录种密穗嵩草K. handel-mazzettii。还收录了最近发表的假钩状嵩草K. pseuduncinoides和阔鳞嵩草K. woodii。此外,重新编制了西藏嵩草属分种和亚种检索表,并较为详细地登记了各类群在西藏的分布地点。     

《现代生物医学进展》编辑部及各通联部联系方式

本刊网址 ：www.biomed.net.cn, www.shengwuyixue.com, www.swcx.periodicals.net.cn E-mail： biomed_54@126.com, liudhui_21 @126.com, biomagnetism@163.com, liudhui21 @gmail.com     

有关生物工程专书文献分类汇集(续)

生物化学《亲和层析》(Affinity Chromatograph)一本实践入门书。P.D.G.Dean,W.S.Johnson和F.A.Middle主编。1055 IRLPress.《亲和层析》(Affinity Chromatograph)粒酸和蛋白的模板层析.H.Schott.19ss MarcelDekker.《氨基酸和肤》(Amino Aeids and Peptides)J.S.Davies 1985 Chapman and Hall.《多肤激素的生物化学》(Bioehemistry of the polypeptide Hormones)M.Wallis,5.L .Howell和K.W.Taylor,2955 John Wiley.     

竹亚科刚竹属植物的修订(Ⅴ)

在模式材料、实物照片或采集物观察比较以及实地考察的基础上,结合原始描述,对竹亚科Bambusoideae刚竹属Phyllostachys Sieb.et Zucc.中最后一批存疑或悬而未决的拉丁双名进行了考订。分别将彭县刚竹P.sapida并入石绿竹P.arcana,P.balansae并入桂竹P.bambusoides,金竹仔P.subulata并入寿竹P.bambusoides f.shouzhu,广州刚竹P.cantoniensis并入水竹P.heteroclada,大节刚竹P.lofushanensis和刺芒刚竹P.aristata均并入笔笋竹P.nidularia f.basipilis,贵州刚竹P.guizhouensis并入毛金竹P.nigra var.henonis,台湾石竹P.lithophila并入刚竹P.sulphurea var.viridis,均作为异名处理;讨论了产于越南的3个种的归属问题,推测P.caobangensis可能与桂竹P.bambusoides为同种,而P.baccanensis和P.vietbacensis可能均与假毛竹P.kwangsiensis为同种。     

《现代生物医学进展》编辑部及各通联部联系方式

本刊网址： www.biomed.net.cn, www.shengwuyixue.com, www.swcx.periodicals.net.cn E-mail ： biomed_54@ 126.com, liudhui__21 @ 126.com, biomagnetism@ 163.com, liudhui21 @gmail.com     

中国清风藤属Sabia Colebr.(清风藤科)的订正

归并了清风藤属5个名称,Sabia campanulata Wall.ex Roxb.var,kingiana Nayar et Majumder处理为S.campanulata Wall.ex Roxb。的异名,S.metcalfiana L.Chen处理为S.leptandra Hook.f.et Thoms.的异名,S.longruiensis X.X.Chen et D.R,Ling和S.swinhoei Hemsl.ex Forbes et Hemsl.ex FOrb.et Hemsl。的异名,S.nervosa Chun ex Y.F.Wu处理为S.coriacea Rehd.et Wils.的异名,订正了缅甸清风藤S.burmania L.chen在中国有分布的错误报道。     

为《Flora of China》提供的伞形科新资料

在为编写《Flora of China》伞形科而进行的修订工作中,提出了11个新组合,即矮小丝瓣芹Acronema minus (M. F. Watson) M. F. Watson & Z. H. Pan, 短柄丝瓣芹A. brevipedicellatum Z. H. Pan & M. F. Watson, 川西当归Angelica sinensis var. wilsonii (H. Wolff) Z. H. Pan & M. F. Watson, 云南细裂芹Harrysmithia franchetii (M. Hiroe) M. L. Sheh, 钝叶独活Heracleum candicans var. obtusifolium (Wall. ex DC.) F. T. Pu & M. F. Watson, 中华天胡荽Hydrocotyle hookeri ssp. chinensis (Dunn ex R. H. Shan & S. L. Liou) M. F. Watson & M. L. Sheh, 普渡天胡荽H. hookeri ssp. handelii (H. Wolff) M. F. Watson & M. L. Sheh, 锐棱岩风Libanotis grubovii (V. M. Vinogradova) M. L. Sheh & M. F. Watson, 美脉藁本Ligusticum likiangense (H. Wolff) F. T. Pu & M. F. Watson和线叶藁本L. nematophyllum (Pimenov & Kljuykov) F. T. Pu & M. F. Watson, 无管藁本L. nullivittatum (K. T. Fu) F. T. Pu & M. F. Watson和二色棱子芹Pleurospermum bicolor (Franch.) C. Norman ex Z. H. Pan & M. F. Watson.; 发现了1个新种,即短柄丝瓣芹。此外,还为Pleurospermum govanianum var. bicolor Franch.指定了后选模式。     

《现代生物医学进展》编辑部及各通联部联系方式

本刊网址:www.biomed.net.cn,www.shengwuyixue.com,www.swcx.periodicals.net.cnE-mail:biomed_54@126.com,liudhui_21@126.com,biomagnetism@163.com,liudhui21@gmail.com编辑部地址:哈尔滨市54号信箱(150001)哈尔滨市花园街184号     

《现代生物医学进展》编辑部及各通联部联系方式

本刊网址:www.biomed.net.cn,www.shengwuyixue.com,www.swcx.periodicals.net.cnE-mail:biomed_54@126.com,liudhui_21@126.com,biomagnetism@163.com,liudhui21@gmail.com编辑部地址:哈尔滨市54号信箱(150001)哈尔滨市花园街184号     

具有放牧率的某些概周期生态模型

文［１］研究了具有放牧率的周期生态模型的周期解的存在性、唯一性与稳定性等问题．本文考虑更加广泛的生态模型,即具有放牧率的概周期生态系统的概周期解的存在性、稳定性,通过利用指数型二分性和不动点方法,得到一些新结果．     

Mean square stability of uncertain stochastic BAM neural networks with interval time-varying delays

The robust asymptotic stability analysis for uncertain BAM neural networks with both interval time-varying delays and stochastic disturbances is considered. By using the stochastic analysis approach, employing some free-weighting matrices and introducing an appropriate type of Lyapunov functional which takes into account the ranges for delays, some new stability criteria are established to guarantee the delayed BAM neural networks to be robustly asymptotically stable in the mean square. Unlike the most existing mean square stability conditions for BAM neural networks, the supplementary requirements that the time derivatives of time-varying delays must be smaller than 1 are released and the lower bounds of time varying delays are not restricted to be 0. Furthermore, in the proposed scheme, the stability conditions are delay-range-dependent and rate-dependent/independent. As a result, the new criteria are applicable to both fast and slow time-varying delays. Three numerical examples are given to illustrate the effectiveness of the proposed criteria.     

相互干扰的捕食与被捕食者种群的Hassall模型定性分析

本文证明了Hassall模型的渐近稳定性、有界性、全局稳定性。解决了文献[1]对该模型的三个猜想：（1）模型在某种条件下,正平衡点（x^*,y^*）是渐近稳定的;（2）模型的一切正初始条件的解有界;（3）模型在一定条件下,正平衡点（x^*,y^*）是全局稳定的。     

New stability criteria for uncertain neural networks with interval time-varying delays

This paper is concerned with the stability analysis for neural networks with interval time-varying delays and parameter uncertainties. An approach combining the Lyapunov-Krasovskii functional with the differential inequality and linear matrix inequality techniques is taken to investigate this problem. By constructing a new Lyapunov-Krasovskii functional and introducing some free weighting matrices, some less conservative delay-derivative-dependent and delay-derivative-independent stability criteria are established in term of linear matrix inequality. And the new criteria are applicable to both fast and slow time-varying delays. Three numerical examples show that the proposed criterion are effective and is an improvement over some existing results in the literature.     

时标上脉冲混合动态系统实用渐近稳定性（英文）

在此篇论文中,采用Lyapunov直接法研究了一类时标脉冲混合动态系统关于两个测度的实用稳定性,进而将多个Lyapunov函数法推广到实用渐近稳定的研究中,并得到了相应的结论.     

延迟遗传调控网络稳定性及分支

本文主要研究了延迟遗传调控网络的局部稳定性和该网络的Hopf分支存在条件．延迟遗传调控网络是无穷维系统,此类系统在平衡点线性化后的特征方程为超越方程。通过对此超越方程进行研究,得到了系统系数不同时的系统稳定的条件及相关结论,又进一步说明了此系统的Hopf分支存在条件．最后,举一个例子进行了数值仿真验证了所得到的结论．     

Mathematical analysis of a metapopulation model with space-limited recruitment

We investigate a mathematical aspect of a multi-species' sessile metapopulation model with space-limited recruitment proposed by Iwasa et al. in 1986. We define some basic reproduction numbers to show the threshold condition for the stability of trivial steady state and the existence of coexistent steady state. We show the existence of steady state where all species exist when some reproduction numbers are greater than one by the fixed point theorem. And we construct the Lyapunov function to show the global stability of trivial steady state when some basic reproduction numbers are not greater than one.     

Sequence specific thermal stability of the collagen triple helix

Theoretical calculations of the thermal stability of collagen triple helices using empirical values for the contribution of individual tripeptide units are presented and compared with direct measurements of the thermal stability of various types of collagens. Relative stabilities are assigned to the positions of the tripeptide units in the amino acid sequence along the length of the collagen molecule. The sequence specific relative stabilities of type I and type XI collagens are compared. These offer insight into the reasons for the existence of unfolding intermediates in type XI collagen that are absent in type I collagen. The pattern of relative stabilities calculated for mouse type IV collagen is consistent with experimental results which indicate that the amino terminal region is very stable and that the interruptions cause increased flexibility and independently unfolding domains. Mutations in the triple helical domain of human type I procollagen occurring in brittle bone disease (osteogenesis imperfecta) show varying effects on the thermal stability of the molecule. The sequence specific thermal stability calculations shed some light on why some mutations of cysteine for glycine have greater effects on the thermal stability than others.     

Distribution and dispersal in populations capable of resource depletion

Summary A simulation model has been used to investigate the influence of animal (insect) distribution and dispersal among exhaustable resource units (food plants). Population size and stability were used as measures of success. The results showed that population size and stability are highest when egg batch size is as large as can be supported by the average food plant or slightly larger if larval dispersal occurs. Clumping of egg batches of food plants increases population stability when egg batches are small by insuring that some food plants will not be overcrowded. Increasing the proportion of larval dispersers or the success of dispersers can increase or decrease population size and stability depending on the original egg batch distribution, but individuals which produce offspring some of which disperse, generally have a selective advantage. Density dependent larval dispersal decreases population stability. Finally, individuals with lower reproductive capacities can have a selective advantage over those with higher reproductive capacities under certain conditions of egg batch size and larval dispersal.     

多比例时滞细胞神经网络的指数周期性与稳定性

研究了一类具多比例时滞细胞神经网络的全局指数周期性与稳定性.通过变换y(t)=x(e~t)将具多比例时滞的细胞神经网络变换成具常时滞变系数的细胞神经网络,利用一些分析技巧与构造合适的Lyapunov泛函,得到系统的周期解存在唯一且全局指数周期的时滞依赖的充分条件,判断方法简单易验证.并给出了两个例子及其数值仿真结果以支持所得结论.