贵州省磷化工现状及发展

重点阐述贵州省磷化工的发展现状以及当前所面临的主要问题，并提出了发展磷化工的总体布局。     

太行山猕猴体表胃电的初步探讨

体表胃电是胃平滑肌功能活动的一项重要指标。为阐明猕猴胃的活动规律,我们对太行山猕猴的体表胃电进行了测量,其测结果为:慢波频率为3.57±0.26次/分,振幅为41.85±7.34微伏。“新斯的明”和“阿托品”对胃电频率影响较小,但前者能增加胃电振幅,后者能减弱胃电振幅。     

较高雷诺数下复杂断面柱体绕流的数值模拟

To simulate numerically the flow past a cylinder, the authors use a mixing method of FEM and FDM for solving the non-steady Navier-Stokes equations in two-dimension. The mesh of computing domain which includes a cylinder with complicated section is generated by composite technique. The results about the flow pattern around the cylinder, pressure distribution on the surface of cylinder and the coefficient of lift and drag agree well with experiment data.     

三辊楔横轧机机架的强度分析及结构参数研究

用有限元法计算并分析了三辊楔横轧机机架的强度,得出了机架各部位的应力状态及应力值,绘制了典型断面及机架外廓的主应力图。针对机架应力集中严重部位,对其结构与参数做了研究,找出了合理的结构参数值,为机架的改进和设计提供了理论依据。     

The responsiveness of acoustic area after stimulation of the caudate nucleus

Riassunto La stimolazione ad alta frequenza e di breve durata del nucleo caudato determina inibizione dei potenziali evocati nell'area uditiva primaria e secondarie sia in animali preparati acutamente sia in animali portatori di elettrodi a dimora.     

一种智能开关控制算法及其在电阻炉微机群控系统中的应用

本文提出了一种对过程参数变化有较好适应性的智能开关控制算法，并介绍了该算法在实际电阻炉群控系统中的硬件和软件的实现。系统运行结果表明，该算法使用便利，需要整定的参数少，并有着较好的输出响应。     

The incorporation of H3-thymidine in newly differentiated nuclei of roots ofVicia faba

Zusammenfassung Bohnenwurzeln (Vicia faba) wurden mit H³-Thymidin behandelt. Autoradiographien zeigen Aufnahmen von DNS in Zellkernen, welche keine Zellteilungen mehr durchmachen.     

Normal larvae obtained from dark fragments of centrifugedCiona eggs

Riassunto Dei due frammenti, jalino e pigmentato, ottenuti per centrifugazione dall'uovo vergine diCiona intestinalis, solo il frammento scuro è capace di svilupparsi. Da esso può aversi una larva completamente normale. Questo risultato è spiegato attribuendo un valore morfogenetico ai mitocondri che sono presenti esclusivamente nel frammento scuro.     

改进的神经网络在路面结构参数设计中的应用

针对常规的路面模量反算算法复杂、运算速度慢的问题,为了克服传统神经网络的不足,文章利用改进的神经网络技术,对路面参数进行分析和预测,采用工程实践中某段路面施工状况FWD测量数据参数作为数据样本,通过样本训练,优化了路面结构参数值,扩大了应用范围,具有较强的实用性。     

Widespread amphibian extinctions from epidemic disease driven by global warming

As the Earth warms, many species are likely to disappear, often because of changing disease dynamics. Here we show that a recent mass extinction associated with pathogen outbreaks is tied to global warming. Seventeen years ago, in the mountains of Costa Rica, the Monteverde harlequin frog (Atelopus sp.) vanished along with the golden toad (Bufo periglenes). An estimated 67% of the 110 or so species of Atelopus, which are endemic to the American tropics, have met the same fate, and a pathogenic chytrid fungus (Batrachochytrium dendrobatidis) is implicated. Analysing the timing of losses in relation to changes in sea surface and air temperatures, we conclude with 'very high confidence' (> 99%, following the Intergovernmental Panel on Climate Change, IPCC) that large-scale warming is a key factor in the disappearances. We propose that temperatures at many highland localities are shifting towards the growth optimum of Batrachochytrium, thus encouraging outbreaks. With climate change promoting infectious disease and eroding biodiversity, the urgency of reducing greenhouse-gas concentrations is now undeniable.