期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Stability of GOY Model Under Modulation of Periodic External Force
1
作者 ZHAO Ying-Kui CHEN Shi-Gang WANG Guang-Rui 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第2期521-524,共4页
There is a phase transition between quasi-periodic state and intermittent chaos in GOY model with a critical value δ0. When we add a modulated periodic externa/force to the system, the phase transition can also be fo... There is a phase transition between quasi-periodic state and intermittent chaos in GOY model with a critical value δ0. When we add a modulated periodic externa/force to the system, the phase transition can also be found with a critical value δe. Due to coupling between the force and the intrinsic fluctuation of the velocity on shells in GOY model, the stability of the system has been changed, which results in the variation of the critical value. For proper intensity and period of the force, δe is unequal to δ0. The critical value is a nonlinear function of amplitude of the force, and the fluctuation of the velocity can resonate with the external force for certain period Te. 展开更多
关键词 CHAOS GOY model phase transition
下载PDF
天然矿研制催化剂活性载体 被引量:1
2
作者 叶炳火 魏可镁 陈雅贞 《福州大学学报(自然科学版)》 CAS CSCD 1996年第2期92-95,共4页
利用XPS,XRD,TAS,BET等表征手段对某铝土矿进行剖析研究.确定一种转型变相加工工艺,使矿中的水合铝转变为活性相,其比表面达到128m2/g,孔容量为0.22cm3/g,吸水性为38.5%,强度>80N/粒,... 利用XPS,XRD,TAS,BET等表征手段对某铝土矿进行剖析研究.确定一种转型变相加工工艺,使矿中的水合铝转变为活性相,其比表面达到128m2/g,孔容量为0.22cm3/g,吸水性为38.5%,强度>80N/粒,可直接用作某些催化剂的载体. 展开更多
关键词 铝土矿 转型变相 活性铝土石 催化剂 载体
原文传递
Popcorning-type cracking failure in thermohyperelastic packaging materials in the presence of “wet” and “dry” cavities
3
作者 LI ZhiGang SHU XueFeng 《Science China Chemistry》 SCIE EI CAS 2013年第3期624-628,共5页
Thermal cracking occurs in the plastic packaging materials due to the presence of moisturized micro-cavities in the material.The moisture resident in the micro-cavities gives rise to the internal vapor pressure that d... Thermal cracking occurs in the plastic packaging materials due to the presence of moisturized micro-cavities in the material.The moisture resident in the micro-cavities gives rise to the internal vapor pressure that drives the thermal expansion of micro-cavities as temperature rises.The plastic packaging materials are considered a class of thermo-hyperelastic materials,thus allowing the micro-cavities to thermally expand to the substantial extent before the cracking failure.The micro-cavities can be moisture-abundant(i.e.,wet) or substantially dry when cracking occurs.Cracking appears to be almost certain in the presence of wet cavities.The possibility of cracking in dry cavities turns to be two-sided:when the initial volume fraction of the micro-cavities is relatively small,cracking cannot occur in the dry cavities regardless of the phase transition temperature;when the initial cavity volume fraction is relatively large,cracking tends to occur in the dry cavities especially when the phase transition temperature is large.Because of the two-sided cracking possibility,the dry-cavity cracking mode presents a scenario that might reveal the mechanism of popcorning-type cracking failure in plastic packaging materials. 展开更多
关键词 plastic packaging materials popcorning-type cracking failure micro-cavities
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部