提出了一种新的基于OFDM多用户通信系统的资源分配算法。该算法在总功率限制和用户数据率要求下,通过以下两步实现子载波、比特和功率的动态分配:第一步,基于用户的平均信道增益和数据率要求进行资源初分配(每个用户分配多少个子载波、...提出了一种新的基于OFDM多用户通信系统的资源分配算法。该算法在总功率限制和用户数据率要求下,通过以下两步实现子载波、比特和功率的动态分配:第一步,基于用户的平均信道增益和数据率要求进行资源初分配(每个用户分配多少个子载波、功率);第二步,对步骤1中的结果进行调整,最终决定每个用户分配到的子载波、功率以及比特载入方式。相比于Hujun Y in等人提出的另一种基于用户需求的算法,新算法的基站发射功率略有增加,但复杂度大为降低,在实际运用中更有利用价值。展开更多
Cardiopulmonary bypass (CPB)-induced lung injury is the most important complication in open cardiac procedures, which affects surgical prognosis directly. During the inflammatory response, interaction between activate...Cardiopulmonary bypass (CPB)-induced lung injury is the most important complication in open cardiac procedures, which affects surgical prognosis directly. During the inflammatory response, interaction between activated leukocytes and endothelial cells is mediated through the expression of three main groups of adhesion molecules: the selectins, the integrins, and the immunoglobulin superfamily. The preventive effect of anti-adhesion on CPB-induced lung injury is supposed to be the farget for farther research.展开更多
文摘提出了一种新的基于OFDM多用户通信系统的资源分配算法。该算法在总功率限制和用户数据率要求下,通过以下两步实现子载波、比特和功率的动态分配:第一步,基于用户的平均信道增益和数据率要求进行资源初分配(每个用户分配多少个子载波、功率);第二步,对步骤1中的结果进行调整,最终决定每个用户分配到的子载波、功率以及比特载入方式。相比于Hujun Y in等人提出的另一种基于用户需求的算法,新算法的基站发射功率略有增加,但复杂度大为降低,在实际运用中更有利用价值。
文摘Cardiopulmonary bypass (CPB)-induced lung injury is the most important complication in open cardiac procedures, which affects surgical prognosis directly. During the inflammatory response, interaction between activated leukocytes and endothelial cells is mediated through the expression of three main groups of adhesion molecules: the selectins, the integrins, and the immunoglobulin superfamily. The preventive effect of anti-adhesion on CPB-induced lung injury is supposed to be the farget for farther research.