关于氢气气瓶安全性的讨论

介绍了国际标准ISOlll20对盛装高压氢气钢瓶设计方面的有关规定,包括钢瓶的材料、设计、制造、力学性能试验和超声波检验,并与美国CPI公司在设计制造高压氢气钢瓶方面所使用的安全控制规范进行了对比,对设计及选用常温高压氢气钢瓶时应注意的问题进行了讨论。     

Principal Rings and their Invariant Factors

In this article we put forward a new look at the theory of principal and Invariant-Factor rings, with a view toward facilitating the formalization, automation, and archiving of results and their proofs. We take an elementary and constructive approach: standard techniques such as prime ideals and factorization of elements are avoided, and determinant constructions are minimized. Using such computationally friendly methods, the main existence and uniqueness results on invariant factors for a f.g. torsion module are derived, and several new algebraic constructions and results are found. The lattice of principal integral ideals for any commutative Bézoutian ring is explicitly constructed based on a first-order proof overlooked in the literature, together with a proof that this lattice is distributive. A Lagrange quotient theorem for finitely generated modules over any principal ring is stated for the first time. A very constructive new proof is given that a principal ring has the Hermite property, so is also an Invariant-Factor ring. A calculus that is needed in the ideal lattice, naturally yields a number of formulas valid for a function lattice.     

Enhanced fault tolerant routing algorithms using a concept of “balanced ring”

Fault rings can be used to guide messages bypass faulty nodes/links in a fault tolerant interconnection network. However, nodes on the fault ring become hot spots, thus causing uneven distribution of the traffic loads. To avoid such traffic congestion, a concept of the balanced ring is proposed in this paper. The proposed balanced ring, defined as concentric rings of a given fault ring, can be applied to the fault tolerant routing algorithms for mesh and torus topologies. By properly guiding messages to route on the balanced ring and the fault ring, more balanced link utilization and greatly reduced traffic congestion can be achieved on a fault tolerant network. Methods of applying the balanced ring concept to some published fault tolerant routing algorithms are discussed. Proof of deadlock and livelock freedom is also presented. The use of balanced ring does not need to add new virtual channels. The performance of two routing algorithms with and without the balanced ring is simulated and evaluated. The results indicate that routing algorithms with the balanced rings constantly yield larger throughput and smaller latency than those without.     

基于环形缓存技术的数据采集实现

讨论了无限长度数据采集系统中，实现数据实时连续采集和处理的方法与途径。通过分析双缓存采集技术的不足，提出了环形缓存技术实现无限长度数据连续采集。着重讨论了环形缓存技术的工作机理和实现方法，并通过在一心电信号采集系统运用，取得了较好的效果。     

20钢纺织钢领无毒盐浴C N RE共渗研究

 用55%KCl+45%NaCl作为基础盐，以“603”无毒液体渗碳剂添加适量的NH4Cl和微量的镧系氯化稀土等均匀混合后制成“混合渗剂”，首先在实验室内对20钢纺织钢领进行了不同温度和时间的C N RE共渗试验。对试验结果进行了表面质量、变形、硬度、金相和剥层分析后，优化出工艺参数，即在860 ℃下共渗25 h后直接淬火，再于140~150 ℃下低温回火15 h。随后，在重庆润丰纺织机械公司热处理车间进行了中试，将中试产品用于上车试验，取得了成功。最后，在100 kW中温盐浴炉上对该产品投入了批量生产。从而，淘汰了原来的气体渗碳后缓冷，再用70%NaCN+30%NaCl盐浴重新加热淬火并进行140~150 ℃低温回火的较为繁琐、不经济和有剧毒的工艺制度。     

除鳞环优化设计实现节水节能效果的研究

高压水射流钢坯除鳞技术是目前国内外应用最为普遍的一项除鳞技术。目前,国内在高压水射流除鳞系统设计上普遍采用试算方法。试算方法在实践中证明是一种比较实用的方法,但这种方法不能得出最佳参数值,即在满足钢坯除鳞效果的条件下,不能最大限度的达到节水节能的目的。以优化设计方法来进行除鳞环的设计,实现除鳞效果同时也达到了资源节约的目的。     

120t转炉托圈制造工艺分析

对120 t转炉托圈制造工艺,从方案的选择,制造工艺,使用效果等进行了详细分析。120 t转炉托圈的制造工艺是合理的,实现了当月投产,当月达产的目标。     

多层组合圆筒体的轴对称温度和热应力的通用计算方法

根据圆筒体轴对称导热的分析原理，推导了多层组合圆筒轴对称导热温度分布和热应力的通用计算式方法，多层组合圆筒体的内部界面温度和径向压力的三对角型方程组形式，给出了计算流程，编写了相应的计算程序，给出了算例．     

掺铒光纤放大器全光自动增益控制发展趋势研究

在简单分析EDFA全光自动增益控制原理的基础上,对其传统经典实现方案与目前新型改进方案进行了比较,得出用光栅来实现EDFA全光自动增益控制的方案具有较高的增益,较低的噪声,用双波长控制的方案要比单波长控制的方案在克服空间烧孔现象（SHB）和驰豫振荡上有更大的优势。     

一种分层的环状应用层多播模型

提出了一种新型的适合于大规模应用层多播的模型VRBH(Virtual Ring-Based Hierarchy),它以环作为拓扑结构,同时引入了分层和虚拟环的概念。采用了基于优先级的动态规划方法使得该环状拓扑结构随时间的变化逐渐趋于合理,并且采取一定的措施使得当出现数据传输错误时可以进行快速的恢复。由仿真试验结果得知该模型具有较低的控制开销,较高的带宽利用率和较高的数据传输率,应用该多播模型可以较好地提高多播的性能。