为解决第五代移动通信(5th generation mobile system,5G)场景下的极化码编码设计问题,通过对两种符合5G保准规定的控制上下行信道最大编码长度的极化码进行MATLAB仿真测试,通过对多种编码方式的平均编码时间进行比较,得到了最佳的极化...为解决第五代移动通信(5th generation mobile system,5G)场景下的极化码编码设计问题,通过对两种符合5G保准规定的控制上下行信道最大编码长度的极化码进行MATLAB仿真测试,通过对多种编码方式的平均编码时间进行比较,得到了最佳的极化码编码方式。结果表明:对于上下行信道来说,在码元长度一定的情况下,不实施比特反转的生成矩阵的编码方法的用时最短编码效率最高、用时最短。展开更多
The rapid development of the automobile industry and the relative lag of the road construction have constituted a prominent contradiction all over the world, particularly, in most of large cities. To cope with it, ele...The rapid development of the automobile industry and the relative lag of the road construction have constituted a prominent contradiction all over the world, particularly, in most of large cities. To cope with it, elevated roads have been built in many cities both at home and abroad. However, traffic jams frequently appear on elevated roads immediately after the completion of their construction. The awkward situation mainly results from the planning bug or the unsuitable control, apart from drastic increase in transportation demand. Elevated roads,展开更多
In the bit-interleaved coded modulation with iterative decoding,it is desired that any two Hamming neighbors,i.e..signal constellation points whose binary labels are at unit Hamming distance,be separated by a large Eu...In the bit-interleaved coded modulation with iterative decoding,it is desired that any two Hamming neighbors,i.e..signal constellation points whose binary labels are at unit Hamming distance,be separated by a large Euclidean distance.This paper determines the mappings for the 32-ary fourdimensional generalized cross constellation（32-4D-GCC） so that the minimum squared Euclidean distance d_（min）~2 between Hamming neighbors is maximized.Among such mappings,those with minimum multiplicity N（d_（min）~2） are selected.To reduce the large search space,a set of ＂mapping templates,＂ each producing a collection of mappings with the same set partitions of binary labels,is introduced.Via enumeration of mapping templates,it is shown that the optimum d_（min）~2=16and the optimum N（d_（min）~2）=16.Among thousands optimum mappings found by computer search,two of the best performance are presented.展开更多
Angiogenesis during reactive and pathologic processes is characteristically associated with inflammation. Inflammatory cells partici- pate in angiogenesis by secreting different molecules that affect endothelial celt ...Angiogenesis during reactive and pathologic processes is characteristically associated with inflammation. Inflammatory cells partici- pate in angiogenesis by secreting different molecules that affect endothelial celt functions. We had previously shown that induced tissue factor （TF） expression in activated rnicrovascular endothelial celts （rn EC） is able to induce angiogenesis via autocrine regulation. However, the signals that induce TF expression in mEC are not fully known. Here, we demonstrate that rnonocyte paracrine cross-talk with mECs triggers rnEC-TF expression. We have identified that rnonocyte-secreted Wnt5a induces TF expression in rnEC and function-ally induces celt rnonolayer repair and angiotube formation in vitro as well as rnicrovesset formation in vivo. Monocyte-secreted Wnt5a activates FZD5 in mECs, which signals to induce the release of intraceUular Ca2＋ and increase NFKB transcription activity and TF gene expression. In sum, WntSa secreted by monocytes signals through the noncanonical Wnt-FZD5 pathway in mECs to induce TF expression that induces angiogenesis by autocrine regulation.展开更多
文摘为解决第五代移动通信(5th generation mobile system,5G)场景下的极化码编码设计问题,通过对两种符合5G保准规定的控制上下行信道最大编码长度的极化码进行MATLAB仿真测试,通过对多种编码方式的平均编码时间进行比较,得到了最佳的极化码编码方式。结果表明:对于上下行信道来说,在码元长度一定的情况下,不实施比特反转的生成矩阵的编码方法的用时最短编码效率最高、用时最短。
文摘The rapid development of the automobile industry and the relative lag of the road construction have constituted a prominent contradiction all over the world, particularly, in most of large cities. To cope with it, elevated roads have been built in many cities both at home and abroad. However, traffic jams frequently appear on elevated roads immediately after the completion of their construction. The awkward situation mainly results from the planning bug or the unsuitable control, apart from drastic increase in transportation demand. Elevated roads,
基金supported by the National Key Basic Research Program of China(973 program) under grant No.2010CB328206NSFC under grants No.60837002+3 种基金60807003and 61102048the Fundamental Research Funds for the Central Universities under grant No.2011JBM208NSF under grant CCF-0952711
文摘In the bit-interleaved coded modulation with iterative decoding,it is desired that any two Hamming neighbors,i.e..signal constellation points whose binary labels are at unit Hamming distance,be separated by a large Euclidean distance.This paper determines the mappings for the 32-ary fourdimensional generalized cross constellation（32-4D-GCC） so that the minimum squared Euclidean distance d_（min）~2 between Hamming neighbors is maximized.Among such mappings,those with minimum multiplicity N（d_（min）~2） are selected.To reduce the large search space,a set of ＂mapping templates,＂ each producing a collection of mappings with the same set partitions of binary labels,is introduced.Via enumeration of mapping templates,it is shown that the optimum d_（min）~2=16and the optimum N（d_（min）~2）=16.Among thousands optimum mappings found by computer search,two of the best performance are presented.
文摘Angiogenesis during reactive and pathologic processes is characteristically associated with inflammation. Inflammatory cells partici- pate in angiogenesis by secreting different molecules that affect endothelial celt functions. We had previously shown that induced tissue factor （TF） expression in activated rnicrovascular endothelial celts （rn EC） is able to induce angiogenesis via autocrine regulation. However, the signals that induce TF expression in mEC are not fully known. Here, we demonstrate that rnonocyte paracrine cross-talk with mECs triggers rnEC-TF expression. We have identified that rnonocyte-secreted Wnt5a induces TF expression in rnEC and function-ally induces celt rnonolayer repair and angiotube formation in vitro as well as rnicrovesset formation in vivo. Monocyte-secreted Wnt5a activates FZD5 in mECs, which signals to induce the release of intraceUular Ca2＋ and increase NFKB transcription activity and TF gene expression. In sum, WntSa secreted by monocytes signals through the noncanonical Wnt-FZD5 pathway in mECs to induce TF expression that induces angiogenesis by autocrine regulation.
