美国的中国通与20世纪60年代初到70年代初的美中关系

研究冷战时期的中美关系,不容忽视的是对美国中国通命运和作用的研究。在20世纪60—70年代初,中美关系进入了一个新的转折时期,美国的中国通的命运也有了改变。中国通在肯尼迪时期开始回到美国国务院任职;学术界的中国通也通过在约翰逊时期的“富布赖特听证会”作证、组织非政府组织和出版中国问题研究的专著等不同方式,教育公众和政要、影响舆论和新闻界,最终促使美国政府改变对华政策。     

新型冷冲模镶块堆焊焊条的研制

介绍一种新研制的适合于大型冷冲模镶块刃口堆焊的专用堆焊焊条 ,通过试验确定了焊条的合金成分并给出了比较合理的焊芯和焊条药皮化学成分。测试结果表明 ,新焊条堆焊层金属的化学成分、硬度、硬度梯度、金相组织均满足在铸铁基体上堆焊制造冷冲模镶块的要求 ,具有良好的焊接工艺性能 ,与常用冷冲模堆焊焊条D32 2的对比试验表明 ,在相同条件下 ,新型焊条的耐磨性能优于D32 2。     

冷加工成形薄壁圆筒体的预应力分析

本文对冷加工成形的薄壁圆筒体进行了详细的预应力分析。对ＧＢ１５０—８９《钢制压力容器》中消除预应力的有关规定进行了探讨。     

《从冷战到冷和--当代国际关系演变与研究》评介

当代国际关系研究已经成为我国社会科学领域研究的一个热点,如何梳理其线条,怎样建构其体系,郝成敦先生的力作《从冷战到冷和———当代国际关系演变与研究》一书在此方面作了很好的尝试。     

冷拌沥青混合料性能评价指标的建议

本文主要分析了当期冷补沥青混合料的评价方式和评价体系,认为评价体系和评价指标的提出应充分考虑国家相关法律规范及现有的技术设备条件而建立,在分析利用的基础上,进一步明确了评价体系和评价指标。     

Phase formation,texture evolutions,and mechanical behaviors of Al0.5CoCr0.8FeNi2.5V0.2 high-entropy alloys upon cold rolling

The cold rolling (CR) reduction dependence of microstructure evolutions and mechanical properties for Al_0.5CoCr_0.8FeNi_2.5V_0.2 high-entropy alloy (HEA) were investigated. The HEA remains FCC structures consisting of nanoscale ordered L1₂ phase, confirming the phase formation prediction. With increasing CR reduction, the textures transform from random ones to FCC rolling ones accompanied by dense slip bands and deformation twins. Under a 50% CR reduction, the deformation textures started to become evident and were governed by typical {111}<112>F, {110}<100>Goss and {112}<111>Cu texture components. When the CR reduction approached 90%, the deformation textures mainly contained the {110}<111>A, {114}<110>X, and {112}<111>Cu texture components. As a result, both Vickers hardness and ultimate strength increased, but the ductility decreased roughly. The enhanced strength should be attributed to the anisotropy and work hardening behavior from textures. The plastic deformation for the samples under low CR reductions was dominated by deformation twins and slip bands. However, under high CR reductions, the textures severely impeded the further propagation of pre-existing slip bands, leading to the rapid decrease of ductility. Therefore, the CR reduction should be carefully designed before optimal heat treatments to enhance the strength and ductility synergy.     

Discharge pattern analysis suggests existence of a low-threshold calcium channel in cold receptors

Summary The regular periodic activity patterns of mammalian cold receptors have been quantitatively studied. Analysis of the timing of either single impulses or impulse groups demonstrated that the periodic receptor process is maintained independently of impulse generation and continues to operate under conditions when afferent impulses are not initiated. These results imply that the underlying conductances must be operational at threshold potentials related to impulse generation. In addition to temperature, the periodic process is considerably sensitive to calcium, which affects mainly the probability of impulse generation during each cycle. Reduction of external calcium and application of calcium entry blockers with relative selectivity for low-threshold calcium channels are similarly effective in modulating cold receptor activity. The data imply the existence of a low-threshold calcium conductance at the sensory terminal.     

冷聚变双中子态模型研究（I）

论述了冷聚变观念，双中子态模型的物理基础；指出“异常”核现象揭示了新物理，不能套用传统的核聚变观念去认识和评价冷聚变．利用双中子态模型及其寿命的计算结果，能解释“死后热”，衰变产物银１１１的存在及长寿命放射性在反应产物中存在的原因．     

磷酸缓冲液浸种对番茄幼苗抗冷性的影响

用 ７．５ ｍｍｏｌ／Ｌ，ｐＨ５．８的磷酸缓冲液浸番茄种子 ５ ｈ，能促进种子萌发和幼苗生长．当幼苗在低温胁迫（５℃± １℃， ４８ ｈ）时，磷酸缓冲液能有效地降低相对电导车、减缓ＭＤＡ的积累，维持较高的ＴＴＣ还原力和促进脯氨酸积累．表明磷酸缓冲液浸种能提高番茄幼苗对冷害的抗性．     

冷核聚变反应截面的测量原理与实验方法

本文对冷核聚变反应截面的测量原理与实验方法进行了详细地讨论，为证实冷核聚变是否存在提供了一条可能的途径，本文所提供的原理与方法，在电化学方面也有一定的实用价值。