A new approach for fabricating B4C/Cu graded composite by rapid self-resistance sintering under ultra-high pressure was presented, by which a near dense B4C/Cu graded composite with a compositional spectrum of 0-100% ...A new approach for fabricating B4C/Cu graded composite by rapid self-resistance sintering under ultra-high pressure was presented, by which a near dense B4C/Cu graded composite with a compositional spectrum of 0-100% was successfully fabricated. Plasma relevant performances of sintered B4C/Cu composite were preliminarily characterized, it is found that its chemical sputtering yield is 70% lower than that of SMF800 nuclear graphite under 2.7keV D+ irradiation, and almost no damages after 66 shots of in situ plasma discharge in HL-1 Tokamak facility, which indicates B4C/Cu plasma facing component has a good physical and chemical sputtering resistance performance compared with nuclear graphite.展开更多
To what extent is law a closed and autopoietic, and to what degree is it an open system interacting with other social structures?1 This complex question can be regarded as the underlying guideline of the present surve...To what extent is law a closed and autopoietic, and to what degree is it an open system interacting with other social structures?1 This complex question can be regarded as the underlying guideline of the present survey of Ancient Law. The historical development of law, and private law in particular, was not the focus of historical and philological studies in the twentieth century. Attention was paid to certain statutes of prominent law-givers such as Hammurabi or Solon, or grand law codifications such as the Twelve Tables.展开更多
With monomer of A_aB_b type, the polymer moments of polycondensation reaction is inves-tigated in detail by means of direct differentiation technique to obtain a recursion formula.This formula is suitable for both pre...With monomer of A_aB_b type, the polymer moments of polycondensation reaction is inves-tigated in detail by means of direct differentiation technique to obtain a recursion formula.This formula is suitable for both pre-gel and post-gel in evaluating the polymer momentsexplicitly.展开更多
基金This work was financially supported by "863 " key foundation of China (No. 715-011-0230).
文摘A new approach for fabricating B4C/Cu graded composite by rapid self-resistance sintering under ultra-high pressure was presented, by which a near dense B4C/Cu graded composite with a compositional spectrum of 0-100% was successfully fabricated. Plasma relevant performances of sintered B4C/Cu composite were preliminarily characterized, it is found that its chemical sputtering yield is 70% lower than that of SMF800 nuclear graphite under 2.7keV D+ irradiation, and almost no damages after 66 shots of in situ plasma discharge in HL-1 Tokamak facility, which indicates B4C/Cu plasma facing component has a good physical and chemical sputtering resistance performance compared with nuclear graphite.
文摘To what extent is law a closed and autopoietic, and to what degree is it an open system interacting with other social structures?1 This complex question can be regarded as the underlying guideline of the present survey of Ancient Law. The historical development of law, and private law in particular, was not the focus of historical and philological studies in the twentieth century. Attention was paid to certain statutes of prominent law-givers such as Hammurabi or Solon, or grand law codifications such as the Twelve Tables.
基金the National Natural Science Foundation of China.
文摘With monomer of A_aB_b type, the polymer moments of polycondensation reaction is inves-tigated in detail by means of direct differentiation technique to obtain a recursion formula.This formula is suitable for both pre-gel and post-gel in evaluating the polymer momentsexplicitly.
