共查询到20条相似文献,搜索用时 390 毫秒
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严巍 《大众科学.科学研究与实践》1998,(1)
为什么潜水动物在肺部储氧量有限的情况下,能在深水呆很长时间?这个问题的答案,生理学家们已寻求了100多年,1870年,法国生理学家鲍尔·贝尔发现,潜水的鸭子心跳频率会骤然减慢。到本世纪40年代时,R·伊尔温克和P·斯考兰德尔两位美国人,创立了堪称现代经典的潜水论,指出潜水动物心脏工作缓慢,只对特别需要氧气 相似文献
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《西南科技大学学报》2003,(4)
第1期(总第69期).科技击文与研究报告基于DVB一S的IP数据业务的实现机制研究·································……李杰,马建国(1)移动机器人小队的队形控制················································……唐钟,李磊民,吴坚(7)基于可编程ASIC技术的Turb。码交织器的实现·”·“······~·……胡莉,马上,陈红艳(11)基于网络安全的ICP欺编的研究·······································……… 相似文献
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刘玉兰 《西北师范大学学报(自然科学版)》1991,(2)
一、分属检索表1。灌木。 2。叶退化为鳞片状,花被片果期不增大;雄蕊12~18;花柱4,坚果具翅或刺毛···…… .............................……,.…,...……,二,···············……1.沙拐枣属CalligonumL. 2。叶发育,内轮花被片果期增大;雄蕊6一8;花柱2一3;坚果无翅或刺毛···········,… ........................·.·...·.········································……2.木寥属AiraPhaxisL.1.草本,稀灌木。 3.花被片3;雄蕊3,柱头2,坚果双凸镜状····4···… 相似文献
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《中山大学学报(自然科学版)》1986,(4)
数学力学计算机科学临界指数变系数半线性方程的正解·,············,··················,·············一刹一熹平19吕61二维示统丘二尸(y),夕=Q(x,约极限环的存在性······,··················,······……王高雄19吕‘,一}带有慢变参数的非线性系统的渐近方法······················,······。……徐兆程水利1086。望二阶线性常微分方程张力样条配置解的渐近表示及其外推···········,··········一韩国强佣洲,… 相似文献
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《中南大学学报(自然科学版)》1986,(6)
(括号内数宇依次为年,期,始页码)地质采矿粤东北某花岗岩体褐帘石的谱学研究····································,··············一彭明生阮道源(1986,1,1)新矿物—额尔齐斯石NaZSi‘O9’··········‘·············,··、、···,·、··、··,··…张如柏杜崇良韩凤呜(1986,l,3)DFG离散函数点阵绘图系统················。···················································… 相似文献
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《西北大学学报(自然科学版)》1982,(4)
(按括号内数字依次为期数、页码)专题研究、,产、,产、、了、、了、.2、,夕‘、夕、,了、,矛、.产‘、少、1了、.了、.了‘、.了、、2、2关于《Cox。双K。认一Plemelj公式的新发明》一文的正确性及其更新证明 ·······································································,,··…,’’···……张世肋银行实时操作系统中外设管理实施方案设计······························一,’’罗景仁用代数数逼近e和e二···… 相似文献
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《苏州大学学报(医学版)》1988,(4)
第4卷第1期!红了乡自限个丫,:零因子的一类环·········································,··,,·····……周士藩(1)一条江大数律的注记·······························,·······························……杜午初(8)一类少冬有负系火的p,i十函数····················,···········,·····················……杨定恭(]3)尺“中极小曲而内班el’二:才:。,表示及其第一… 相似文献
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《贵州工业大学学报(自然科学版)》1987,(4)
第一期(总第35期)装配整休式钢筋混凝土空腹网架结构的设计与研究···……马克俭~};明辉完整与非完整力学系统的积分变分原理的一Ricmam形式···……段成尧线性规划的一种改进算法与程序················································……刘关于Huard定理的推广·························································……俞关于D3d型〔XZY。」”(n一2干,o,2一,4一)基团振动波数……马衡雷贵州台江下寒武统Bathy… 相似文献
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《南京大学学报(自然科学版)》1982,(1)
第期关于具有离散谱的线性无界算子的摄动问题及其应用·4··············4··········……王体翔(1)、。面_。._.:.___。.J_心__,1__、。、。二。、,、、樱什、方程嘿=一夕一夕2一卜二二y一卜而,赞二州1+a幼的极限环的位置估计~’一d云口J一J一7d才一‘一”’“?一’‘、””‘一一r一” 与唯一性····························,······,4····························,············……王明淑(13)多自由度系统结构对反共振现象的影响·… 相似文献
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《山东理工大学学报:自然科学版》2004,(6)
第1期微观仿真车道变换模型研究·························································,,,·,······,··,····,,,,·王晓原,孟昭为,宿宝臣(1)离散变量板壳结构拓朴优化设计及其应用···················································……柴山,曲庆文,李建新,等(6)闪速热解挥发实验中玉米秸颗粒滞留时间的确定··········································……… 相似文献
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《内蒙古民族大学学报(自然科学版)》2003,(6)
第1期三精圆柱体绕流流场和压力场的边界元分析·····,···········,···············……李春芝,张国有,杨德全(1)多原子极性半导体中体极化子的内部激发态························,、···················……王成舜,肖景林(5)极性膜中弱稠合极化子自陷能的温度依赖性的研究···············……乌力吉仓,额尔敦朝兽,肖景林(9)半导体表面态的研究与展望·····················,······················… 相似文献
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《广西师范大学学报(自然科学版)》2003,(4)
第1期基于优先度的人工生命体行为选择研究···················································,········……谢汝林,李祖枢智能系统集成开发平台ISIDP的实现与应用····································……刘大有,杨博,虞强源,等基于属性坐标分析和学习的评估决策模型·······································……吴钦藩,冯嘉礼,董占球,等模糊算子神经网络的函数逼近能力·········… 相似文献
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《徐州师范大学学报(自然科学版)》2003,(4)
·数学·收缩核与拓扑度的计算···········································································……孙经先(l,1)关于奇摄动Robin边值问题的几个定理··········································……周明孺,王广瓦(1,5)强连续余弦算子函数的不可约性·······································……张玉丽,王彩侠,宋晓秋(1,10)一类口中多圆柱上函数空间上的极… 相似文献
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《中国科学(G辑)》2004,34(6):i001-i003
on,了nl 66内z巧︸ ‘l 1卫,.1,尸,J 八、44﹄、 ‘几胜1 J.L,.. 勺一IJ 孟U,沙 ,..五,.且 题目作者 物理学 全反式类胡萝卜醛(all一tra。井APo一8’一calotenal)的飞秒时间分辨瞬态吸收光谱············一 】·································4··················……张蕾全冬晖汪力杨国祯翁羽翔 基于电磁场积分方程数值求解法的光学近场散斑及其一阶统计特性···················~·······~·… ~···一····~··一·······~~… 相似文献
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《浙江师范大学学报(自然科学版)》2003,(4)
·专家约稿·植物病原菌激发子与信号识别机理64种荒摸植物种子微形态的研究郭泽建,蒋冬花(1·l)骥,李俊祯,泥志,等(2·平(4·109)马基于行为主义的数学教育理论·······························································……喻325)·数学.局部凸H一空间中Ky Fan型截口定理的一些新的应用····································……孟莉(1·8)一类广义梯度及其在最优化中的应用······················… 相似文献
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《邵阳学院学报(自然科学版)》2004,1(4):124-128
第一期B(I)空间中两种收敛的拓扑比较···········,·····················,·········································……李经文(1)分数傅里叶变换全息与菲涅耳衍射·······,········……,.’,······································……曾阳素,郭永康(2)高强铝合金铸态组织与性能的研究················································……宁爱林,… 相似文献
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《西安工程科技学院学报》2003,(4)
关抗SARS专栏关抗SARS战役的思考·························································……,’’…周国泰,等第3期(189)对SARS制定科学术语的意见······················································……翁心植第3期(192)医用防护服研究现状及SARS防护服的性能要求···························……张建春,等第3期(坤4)1月下E复合膜的SARS防护及透湿机理的研究·····… 相似文献