The ratio of the second-to-fourth digit length（2D：4D）has been shown to be sexually dimorphic,with males having lower mean than females and the ratio relates to masculinity and femininity in adults.2D：4D is influen...The ratio of the second-to-fourth digit length（2D：4D）has been shown to be sexually dimorphic,with males having lower mean than females and the ratio relates to masculinity and femininity in adults.2D：4D is influenced by digit growth pattern which is related to the ratio of prenatal androgen to estrogen levels in the later part of the first trimester.展开更多
The Newcomb-Benford law, which describes the uneven distribution of the frequencies of digits in data sets, is by its nature probabilistic. Therefore, the main goal of this work was to derive formulas for the permissi...The Newcomb-Benford law, which describes the uneven distribution of the frequencies of digits in data sets, is by its nature probabilistic. Therefore, the main goal of this work was to derive formulas for the permissible deviations of the above frequencies (confidence intervals). For this, a previously developed method was used, which represents an alternative to the traditional approach. The alternative formula expressing the Newcomb-Benford law is re-derived. As shown in general form, it is numerically equivalent to the original Benford formula. The obtained formulas for confidence intervals for Benford’s law are shown to be useful for checking arrays of numerical data. Consequences for numeral systems with different bases are analyzed. The alternative expression for the frequencies of digits at the second decimal place is deduced together with the corresponding deviation intervals. In general, in this approach, all the presented results are a consequence of the positionality property of digital systems such as decimal, binary, etc.展开更多
目的:探究GLI锌指3(GLI3)基因5个位点(rs77640775、rs2051935、rs3823720、rs1125413、rs846266)单核苷酸多态性(SNP)与指长比的关联性。方法:选取宁夏807名汉族大学生(女性405人,男性402人)为研究对象,以数码相机及Image-Pro Plus 6.0...目的:探究GLI锌指3(GLI3)基因5个位点(rs77640775、rs2051935、rs3823720、rs1125413、rs846266)单核苷酸多态性(SNP)与指长比的关联性。方法:选取宁夏807名汉族大学生(女性405人,男性402人)为研究对象,以数码相机及Image-Pro Plus 6.0图像软件分别采集双手照片,并测量示指(2D)和环指(4D)指长,多重PCR法检测GLI3基因5个SNP位点的基因型,单因素方差分析评估示-环指长比(D_(2/4))与GLI3基因多态性的关系。结果:宁夏女大学生左手D_(2/4)(LD_(2/4))、右手D_(2/4)(RD_(2/4))均显著高于男性;男性和女性间GLI3基因5个位点基因型和等位基因频率分布差异均无统计学意义;不同性别GLI3基因5个位点SNPs与双手D_(2/4)间均无显著关联。结论:D_(2/4)在宁夏大学生的分布具有显著性别二态性,暂未发现GLI3基因位点多态性与其形成有关。展开更多
随着数字电视的普及与发展,采用基于第二代地面数字视频广播(Digital Video Broadcasting-Terrestrial Second Generation,DVB-T2)技术的电视信号转播方案已经成为提升广播信号质量和覆盖范围的关键。针对电视信号塔的实时转播方案进行...随着数字电视的普及与发展,采用基于第二代地面数字视频广播(Digital Video Broadcasting-Terrestrial Second Generation,DVB-T2)技术的电视信号转播方案已经成为提升广播信号质量和覆盖范围的关键。针对电视信号塔的实时转播方案进行系统设计,重点分析不同环境下信号转播的技术需求。通过分析DVB-T2信号塔的系统架构、信号处理、传输链路、天线布局及频率分配等设计要点,提出一种具有高效性和实用性的实时转播方案,并保证方案在城市、山区和郊区等不同环境下的适配性,以实现广泛且稳定的信号覆盖。展开更多
文摘The ratio of the second-to-fourth digit length（2D：4D）has been shown to be sexually dimorphic,with males having lower mean than females and the ratio relates to masculinity and femininity in adults.2D：4D is influenced by digit growth pattern which is related to the ratio of prenatal androgen to estrogen levels in the later part of the first trimester.
文摘The Newcomb-Benford law, which describes the uneven distribution of the frequencies of digits in data sets, is by its nature probabilistic. Therefore, the main goal of this work was to derive formulas for the permissible deviations of the above frequencies (confidence intervals). For this, a previously developed method was used, which represents an alternative to the traditional approach. The alternative formula expressing the Newcomb-Benford law is re-derived. As shown in general form, it is numerically equivalent to the original Benford formula. The obtained formulas for confidence intervals for Benford’s law are shown to be useful for checking arrays of numerical data. Consequences for numeral systems with different bases are analyzed. The alternative expression for the frequencies of digits at the second decimal place is deduced together with the corresponding deviation intervals. In general, in this approach, all the presented results are a consequence of the positionality property of digital systems such as decimal, binary, etc.
文摘目的:探究GLI锌指3(GLI3)基因5个位点(rs77640775、rs2051935、rs3823720、rs1125413、rs846266)单核苷酸多态性(SNP)与指长比的关联性。方法:选取宁夏807名汉族大学生(女性405人,男性402人)为研究对象,以数码相机及Image-Pro Plus 6.0图像软件分别采集双手照片,并测量示指(2D)和环指(4D)指长,多重PCR法检测GLI3基因5个SNP位点的基因型,单因素方差分析评估示-环指长比(D_(2/4))与GLI3基因多态性的关系。结果:宁夏女大学生左手D_(2/4)(LD_(2/4))、右手D_(2/4)(RD_(2/4))均显著高于男性;男性和女性间GLI3基因5个位点基因型和等位基因频率分布差异均无统计学意义;不同性别GLI3基因5个位点SNPs与双手D_(2/4)间均无显著关联。结论:D_(2/4)在宁夏大学生的分布具有显著性别二态性,暂未发现GLI3基因位点多态性与其形成有关。
文摘随着数字电视的普及与发展,采用基于第二代地面数字视频广播(Digital Video Broadcasting-Terrestrial Second Generation,DVB-T2)技术的电视信号转播方案已经成为提升广播信号质量和覆盖范围的关键。针对电视信号塔的实时转播方案进行系统设计,重点分析不同环境下信号转播的技术需求。通过分析DVB-T2信号塔的系统架构、信号处理、传输链路、天线布局及频率分配等设计要点,提出一种具有高效性和实用性的实时转播方案,并保证方案在城市、山区和郊区等不同环境下的适配性,以实现广泛且稳定的信号覆盖。
