熔体物性综合测定仪的控制系统

介绍利用微机制控制和数据处理技术,结合工艺对熔体的物理化学性能进行测量的方法和系统,以及系统的硬件配置,软件组成和功能。该系统能快捷高效地测量出熔体粘度、表面张力、熔渣密度等,具有较高的精确性、可靠性和实用性。     

抗震钨丝的现状与展望

叙述了抗震钨丝的掺杂机理和制备工艺，指出只有掺入K、Si和Al，才能获得良好的抗震性能。文章还介绍了国内外生产现状，并对抗震钨丝的发展方向提出了新的见解。     

车灯几何光路的分析及优化设计

通过车灯几何光路的分析,提出了一种优化设计方案.     

翅片在镁熔砣余热回收过程中的效果分析

应用FLUENT软件,分别对有无翅片的余热回收室内的余热回收过程进行数值模拟。通过对翅片蓄热升温过程、余热回收室内布风情况、余热回收时间、风温变化等方面的对比,分析得到翅片对镁熔坨余热回收的影响,从而为带翅片镁熔砣余热回收方法的确定提供理论依据,所得出结论可用于指导实际生产。     

高炉法钙镁磷肥适当提高鼓风氧含量的试验

为促使高炉法钙镁磷肥企业在提高产量、降低消耗的基础上提高企业经济效益,云南沾益磷肥厂在2#高炉上用纯氧提高鼓风空气中氧含量1%～2%进行工业性生产试验。试验证实了适当提高氧含量鼓风是安全可靠的,提高氧含量鼓风尽管技术很成熟,但由于氧含量提高过少,影响钙镁磷肥高炉技经指标因素较多,试验未取得理想效果。应进一步制定提高鼓风中氧含量在10%～30%的试验方案,继续试验,开发这一工业应用技术。     

复合材料纤维张力缠绕预应力场动态特性

复合材料纤维张力缠绕技术通过提高纤维的张力水平可充分发挥纤维高强、高模优势,在成型过程中对结构进行预紧,成为解决高速转动部件径向变形大、界面强度低等问题新的有效途径。将每一层纤维的张力缠绕等效为一个含预应力复合材料薄环的叠加,基于正交各向异性复合材料缠绕层和各向同性金属芯模弹性变形理论,建立了纤维张力缠绕力学解析模型,得到芯模和缠绕层预应力场随缠绕层数及缠绕张力的变化规律,并通过复合材料纤维张力工艺试验验证了力学解析模型的正确性。研究发现了纤维张力缠绕中预应力“饱和”现象,并确定了影响张力缠绕预应力场的两个主要参数:缠绕层环径向刚度比E_θ/E_r和张力大小T（r）,为复合材料纤维张力缠绕成型工艺提供理论支撑。      

The Mechanisms of Thin Filament Assembly and Length Regulation in Muscles

The actin containing tropomyosin and troponin decorated thin filaments form one of the crucial components of the contractile apparatus in muscles. The thin filaments are organized into densely packed lattices interdigitated with myosin-based thick filaments. The crossbridge interactions between these myofilaments drive muscle contraction, and the degree of myofilament overlap is a key factor of contractile force determination. As such, the optimal length of the thin filaments is critical for efficient activity, therefore, this parameter is precisely controlled according to the workload of a given muscle. Thin filament length is thought to be regulated by two major, but only partially understood mechanisms: it is set by (i) factors that mediate the assembly of filaments from monomers and catalyze their elongation, and (ii) by factors that specify their length and uniformity. Mutations affecting these factors can alter the length of thin filaments, and in human cases, many of them are linked to debilitating diseases such as nemaline myopathy and dilated cardiomyopathy.