Orthogonal variable spreading factor channelization codes are widely used to provide variable data rates for supporting different bandwidth requirements in wideband code division multiple access (WCDMA) systems. A new...Orthogonal variable spreading factor channelization codes are widely used to provide variable data rates for supporting different bandwidth requirements in wideband code division multiple access (WCDMA) systems. A new code match scheme for WCDMA code tree management was proposed. The code match scheme is similar to the existing crowed-first scheme. When choosing a code for a user, the code match scheme only compares the one up layer of the allocated codes, unlike the crowed-first scheme which perhaps compares all up layers. So the operation of code match scheme is simple, and the average time delay is decreased by 5.1%. The simulation results also show that the code match strategy can decrease the average code blocking probability by 8.4%.展开更多
目的确定福建省泉州地区汉族群体21个常染色体短串联重量复(short tandem repeats,STR)基因座的遗传多态性参数,评估GlobalFiler检测系统在法医学个体识别和亲权鉴定中的应用价值。方法用GlobalFiler复合扩增体系扩增402名泉州汉族无关...目的确定福建省泉州地区汉族群体21个常染色体短串联重量复(short tandem repeats,STR)基因座的遗传多态性参数,评估GlobalFiler检测系统在法医学个体识别和亲权鉴定中的应用价值。方法用GlobalFiler复合扩增体系扩增402名泉州汉族无关个体的DNA样本,计算21个常染色体STR基因座的遗传学参数。结果21个常染色体STR基因座的基因型分布均符合Hardy-Weinberg平衡,且均具有较高的多态性,其观测杂合度为0.637~0.945,个人识别率为0.801~0.991,多态性信息含量为0.570~0.940,非父排除率为0.337~0.888,匹配概率为0.009~0.199。结论GlobalFiler检测系统在泉州地区汉族人群法医学个体识别和亲权鉴定有较高的应用价值。展开更多
文摘为完成地形辅助导航系统的传感器选型以及改进地形匹配算法和地形辅助导航系统可靠性的研究,开展了传感器精度对地形匹配概率的影响研究.针对不同的地形,分析了高度表误差、速度误差和航向角误差对地形匹配概率的影响,并根据实际要求通过仿真计算确定地形匹配系统中各传感器的误差范围.利用丘陵、山地和高山地等大量地形数据进行测试验证,仿真结果表明:在地形匹配概率大于90%时,速度误差小于2.2 m/s,航向角误差小于0.6°,高度表噪声标准差小于16.4 m.
基金Project(60202005) supported by the National Natural Science Foundation of China
文摘Orthogonal variable spreading factor channelization codes are widely used to provide variable data rates for supporting different bandwidth requirements in wideband code division multiple access (WCDMA) systems. A new code match scheme for WCDMA code tree management was proposed. The code match scheme is similar to the existing crowed-first scheme. When choosing a code for a user, the code match scheme only compares the one up layer of the allocated codes, unlike the crowed-first scheme which perhaps compares all up layers. So the operation of code match scheme is simple, and the average time delay is decreased by 5.1%. The simulation results also show that the code match strategy can decrease the average code blocking probability by 8.4%.
文摘目的确定福建省泉州地区汉族群体21个常染色体短串联重量复(short tandem repeats,STR)基因座的遗传多态性参数,评估GlobalFiler检测系统在法医学个体识别和亲权鉴定中的应用价值。方法用GlobalFiler复合扩增体系扩增402名泉州汉族无关个体的DNA样本,计算21个常染色体STR基因座的遗传学参数。结果21个常染色体STR基因座的基因型分布均符合Hardy-Weinberg平衡,且均具有较高的多态性,其观测杂合度为0.637~0.945,个人识别率为0.801~0.991,多态性信息含量为0.570~0.940,非父排除率为0.337~0.888,匹配概率为0.009~0.199。结论GlobalFiler检测系统在泉州地区汉族人群法医学个体识别和亲权鉴定有较高的应用价值。
