同轴热敏电缆电容特性的研究

同轴热敏电缆原是基于其具有的NTC热敏电阻特性研制而成的,对其结构、原理进行了介绍.实验中,发现同轴热敏电缆不仅具有良好NTC热敏电阻特性,同时还具有良好的PTC热敏电容特性,针对其具有的电容特性,做了火焰灼烧电容响应及恢复实验、重复性实验、振动和冲击实验.同轴热敏电缆电容特性的发现为其双参数控制提供了新途径.     

真空平板玻璃支撑应力实验研究

用弹性力学的结点法建立真空玻璃支撑应力-应变力学模型，求出真空玻璃的支撑应力-应变场，分析了其应力-应变分布规律，同时用了电测方法进行试验验证。试验结果表明，真空玻璃最大应力发生在四角第二个支撑处，最大应力弹性力学计算值11．057MPa，电测法的测试值11．765MPa，两者误差为6．02％。支柱横截面上的正应力为179MPa，纵向变形为0．2686μm（钢柱），0．7414μm（玻璃柱）。控制支撑高度误差和玻璃的平整度，保证受力的均匀，可增加真空玻璃的强度，增加其可靠性，提高其使用寿命。     

完全图的剖分图的线图的谱

如果一个图G的邻接矩阵A(G)的特征多项式的所有特征值全为整数,则称图G是整的.设图L2(Kp):L(s(Kp))是完全图Kp的剖分图S(Kp)的线图.在这篇文章里,我们利用图的理论给出了S(Kp)和L2(Kp)的特征多项式及其谱.对于图L2(Kp),得到了其补图、线图、线图的补图及补图的线图的特征多项式.也证明了这些图都是整图.这些整图的发现是对整图的研究的一个新贡献.     

Growth of the number of indexed journals of Latin America and the Caribbean: the effect on the impact of each country

The number of LA–C indexed journals in WoS has increased from 69 to 248 titles in just a period of four years (2006–2009). This unprecedented growth is related to a change in the editorial policy of WoS rather than to a change in the LA–C scientific community. We find that in the LA–C region, Brazil had the largest increase in its WoS production that also corresponded to a large increase in its production in its indexed local journals. As a consequence, Portuguese has been promoted to the second scientific language, only after English, in the LA–C production in WoS. However, while the Brazilian production in its local journals represents about one quarter of its whole WoS production, it shows a rather little effect on the respective number of citations. The rest of the LA–C countries represented in WoS still show very low levels in production and impact. Scopus has also enlarged considerably the database’s coverage of LA–C journals but with a steady growth in the period considered in this study.     

论产品设计中“设计概念”的隐喻性

以产品设计中的“设计概念”为核心,论述设计概念所包含的范畴以及表现,从设计概念的本质角度出发,解析其在设计环境中的隐喻作用,阐述设计概念的表象以及背后隐藏的内容,从“抽象与具象”、“出现与未出现”和“独立与非独立”中,理解设计概念的本源意义,从而真正分析和探究概念在设计中的价值。     

行政程序法上的行政参与原则

对行政参与原则进行了基础性研究,阐释了行政参与的概念与特征,解析了行政参与原则的法律 意义,揭示了该原则确立的社会根由.     

信息管理与信息系统专业人才系统思维培养的探讨

文章针对信息管理与信息系统（简称“信管”）专业复合人才培养的难题，提出用系统科学作为方法论基础，讨论了系统思维训练的必要性和重要性，分析了系统思维培养的目标和任务，并结合学校实际，探讨了在专业培养目标、教学计划和课程设置，以及教学实践等方面的具体实施。     

预防板翅式换热器芯体顶部下凹的工艺探索

分析板翅式换热器的芯体设计、翅片尺寸、材料状态和钎焊工艺四个方面对板翅式换热器芯片强度和抗压能力的影响,探索预防板翅式换热器芯体顶部下凹的工艺预防措施,以提高板翅式换热器的外观质量及承压强度。     

CPT色纯漂移自动测量

提出了凹点法测量显示管色纯漂移,建立了自动测试系统,实现了快速高精度的测试,为高分分辨率彩色显像管（ＨＤＴＶ）的研制提供了有力的工具。     

Influence of the proportion of wood on the thermal and mechanical performances of clay-cement-wood composites

The introduction of wood aggregates to produce low density composites is an interesting technique allowing the reuse of wastes from both the aggregate-mining and wood processing industries. This paper describes the influence that the proportion of wood aggregates has on the thermal and mechanical performance of a clay-cement-wood composite. First, the composite material and its production technique are presented. Then, the thermal conductivity, mechanical strengths and the porosity of the matrix are experimentally evaluated. Finally, it is shown that the addition of wood to clayey concrete improves its insulation characteristics, reduces its mechanical strength and increases its deformability.     

Recent developments in the documentation system of the Chinese Patent Office

Since the first Chinese Patent Law was promulgated, the Chinese Patent Office has been trying to establish its search files. It learned from some good experiences abroad and took its own concrete situation into consideration. A scientifically arranged and practical documentation system is expected.     

用回路法分析自动模切机双肘杆机构

为了研究模切机的双肘杆机构的运动规律,根据回路法的基本原理,提出了用回路法分析复杂连杆机构运动规律的方法,描述了回路法的基本原理与实际应用.用回路法分析模切机的双肘杆机构,避免了对机构的拆分.基于回路法建立了模切机双肘杆施压机构的运动数学方程,并绘出了双肘杆机构部分构件位移、速度、加速度的运动曲线.     

解构主义对现代主义设计的意义

通过分析现代设计的发展历程,进而论证了解构主义设计自诞生以来对现代设计作出的巨大贡献。这种贡献不仅仅体现在它的广度上,更在于它的深度:即从思想观念与设计理念上对现代设计作出了影响。     

木塑复合材料的发展回顾

由于具有经济和环保的优点,木塑复合材料在近些年得到了快速发展.本文主要回顾了国内外木塑复合材料的发展历史和研究现状.包括所研究的木塑复合材料的种类、力学行为的表征和特点、各种影响木塑复合材料力学性能的因素,以及为提高木塑复合材料力学性能而采取的物理和化学的处理方法和工艺.还介绍了一些用来研究木塑复合材料行为的实验手段.     

A note on the can-order policy for the two-item stochastic joint-replenishment problem

In this paper, a two-item continuous-review inventory system is studied. Demands for item 1 and item 2 occur at epochs generated by independent Poisson processes. In addition to the standard cost structure, there is economy of scale in joint replenishment. For the continuous joint replenishment problem, the literature proposes the can-order policy. Under this policy, an order is triggered by item 1 at its demand epoch, when its inventory position falls to its reorder level. In this situation, if the inventory position of item 2 is at or below its “can-order” level, item 2 is also included in this order and a discounted fixed ordering cost is charged for it. As a result, the inventory positions of both items are raised to their respective order-up-to levels. Reciprocally, the same procedure is valid at the demand epoch of item 2. In this study, this two-item inventory system is modeled as a semi-Markov decision process and a simple enumeration algorithm is proposed for its solution. We show that previous formulations of the problem do not necessarily converge to the best can-order policy by providing numerical examples.     

小波双三次插值搜索算法提高遥感图像分辨力

通过小波双三次插值中高频外推阈值门限选取与峰值信噪比变化关系的分析,提出了小波双三次插值搜索算法。该算法能够自动搜索到高频外推的最佳阈值门限,在不破坏光学遥感图像原始信息的情况下,提高图像的空间分辨力和峰值信噪比,有利于对图像的细节信息进行观察分析。实验表明,该算法的重建图像的峰值信噪比比全小波插值图像和小波双线性插值图像的峰值信噪比分别高6.5dB和2.4dB,熵提高到原图像的1.3倍,是一种提高光学遥感图像分辨力的有效算法。     

Evolution of the structure of the WWER-1000 reactor vessel from the prototype model to WWER-1200

We discuss the guidelines used in the design of the vessels of WWER-1000 (water-cooled water-moderated) nuclear reactors. The characteristic specific features of the structure of the reactor vessel are discussed, and the subsequent steps of improvement of its design aimed at the increase in its operating safety and designed service life up to 60 years are proposed.     

State Primary Standard of the Units of the Disperse Parameters of Aerosols,Suspensions, and Powdered Materials

An analysis is made of the use of measuring instruments for obtaining the disperse parameters of aerosols, suspensions, and powder materials and their metrological assurance is considered. The State primary standard for the disperse parameters is described together with its purpose, its operating principles, and its technical and metrological characteristics.     

The role and effects of the third body in the wheel–rail interaction

This paper focuses on the presence of the third body, a solid interfacial layer in the wheel–rail contact. This third body is studied from different viewpoints: its presence including composition, thickness and morphology; and its role with respect to its load‐carrying capacity, shearing behaviour, transfer of material and finally global friction coefficient. The general approach is phenomenological and is carried out as closely as possible of the real tribological behaviour of this contact. This paper presents a synthesis of different studies coming from: analysis of specimens taken out periodically from rails and wheels in service, and thus under real contact conditions; and test laboratories, allowing us to impose rolling–sliding conditions with very high precision. From all these studies and results, a better understanding of the role of the third body and its influence on friction, adhesion and damage mechanisms (wear, pits, cracks …) is reached and this is the first step for including its effect in numerical models.     

Effect of the smelting and refining methods on the endurance of St. 20 steel in working media

The article describes the results of a study of fatigue strength, low-endurance fatigue, and the work of deformation of St. 20 steel produced by various methods (acid and basic smelting, vacuum-arc refining). It was shown that while the fatigue limit of this steel is not substantially affected by the method of its preparation, its endurance in air and neutral corrosive media when subjected to cyclic elastoplastic strains (i.e., its low-endurance fatigue strength) depends to a large extent on the method of its manufacture and on the resulting degree of its purity.