Description of the Superdeformed Bands of the Odd-Odd Nuclei in A ～ 150 Region

With the supersymmetry scheme including many-body interactions, the global property and the △I ＝ 4bifurcation in the superdeformed (SD) bands of odd-odd nuclei in A ～ 150 mass region are investigated systematically.Good results for the γ-ray energies, the dynamical moments of inertia, and energy differences △ Eγ - △ Erefγ are obtained.It shows that this approach is quite powerful in describing not only the SD bands in even-even and odd-A nuclei butalso those in odd-odd nuclei in the mass region.

First Observation of Yrast Band in Odd-Odd N=91 ^(162)Lu Nucleus

High Spin states of the odd-odd 162Lu nucleus have been studied via 147Sm(19F,4nγ)reaction at90 MeV beam energy.Level scheme for yrast band based on π[h11/2]v[i13/2]configuration was estab-lished,for the first time,up to Iπ=23-.This band shows the signature inversion in energy before band-bending generally appeared in this mass region.It is stressed that the signature splitting in 162Lu is biggerthan that in 160Tm which could be understood in the framewrok of the cranked shell model if taking posi-tire γ-triaxiality into account.

Description of Chiral Doublet Bands in Odd-Odd Cs Isotopes

Properties of the chair doublet bands of the odd-odd Cs isotopes built on the πh_(11/2)  υh_(11/2) configurationare investigated systematically within the supersymmetry scheme including many-body interactions and possessing theSO(5)(or SU(5)) symmetry on the rotational symmetry.Quantitatively good results of the energy spectra,the energystaggering parameter as a function of the spin are obtained.The calculation shows that the stronger competition betweenthe pairing and anti-pairing effects and the SU(3) symmetry broking more seriously exist in the stable chiral structure.

Description of the Superdeformed Bands of Odd-Odd Nuclei in A～80 Region

Properties of the superdeformed bands of odd-odd nuclei in A ～ 80 mass region are investigated systematically within the supersymmetry scheme including many-body interactions and a perturbation possessing the S0(5)(or SU(5)) symmetry on the rotational symmetry. The obtained γ-ray energies, and the dynamical moments of inertia agree with experimental data. It shows that this approach is quite powerful in describing odd-odd nuclei in A ～ 80 mass region.

Signature inversion in odd-odd 76Rb,80Rb

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One possible mechanism for signature inversion of odd-odd nuclei

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应用累积比数logit模型和偏比例优势模型分析肺癌手术患者住院费用影响因素

目的阐明累积比数logit模型和偏比例优势模型在有序分类资料中的应用。方法以肺癌手术住院费用的相关因素分析为例,采用累积比数logit模型和偏比例优势模型对肺癌手术住院费用与各相关因素关系进行拟合,通过模型的对数似然值(-2ln L)判断2种模型拟合的优度。结果在自变量不全满足比例优势假定条件时(性别χ^(2)=15.888,P<0.001;手术术式χ^(2)=35.874,P<0.001),2种分析方法拟合结果不同。在不同分割点,住院费用与手术术式关系的差别较大。偏比例优势模型(-2ln L=5797.112)优于累积比数logit模型(-2ln L=5852.420),差异具有统计学意义(P<0.05)。结论有序分类资料的分析,首先应进行比例优势假定条件验证,如果自变量均满足该条件,选择累积比数logit模型,否则采用偏比例优势模型拟合。

Pell方程组x^(2)-40y^(2)=1与y^(2)-Dz^(2)=9的公解

设D=2p_(1)⋯p_(s)(1≤s≤4),其中p_(1),⋯,p_(s)是互不相同的奇素数。主要利用奇偶分析、同余、递归序列以及Pell方程解的性质等初等方法,对Pell方程组x^(2)-40y^(2)=1与y^(2)-Dz^(2)=9的公解进行研究。得出当D≠2×7×103时,该方程组仅有平凡解(x,y,z)=(±19,±3,0);当D=2×7×103时,除了平凡解(x,y,z)=(±19,±3,0)外,还有非平凡解(x,y,z)=(±27379,±4329,±114)。研究结果丰富了这类Pell方程组整数解的研究内容。

Pell方程组x^(2)-33y^(2)=1与y^(2)-Dz^(2)=16的公解

利用奇偶分析、递归序列、同余和Pell方程的解的性质等一些初等方法,对D=2p1……ps(1≤s≤4),其中p1,…,ps是互不相同的奇素数时,Pell方程组x^(2)-33y^(2)=1与y^(2)-Dz^(2)=16的公解进行了研究.得到除开D=2×7×151,方程组有非平凡解(x,y,z)=(±48599,±8460,±184)这一基本情况之外,仅有平凡解(x,y,z)=(±23,±4,0),从而推进了这类Pell方程组整数解的研究.

Signature Inversion in Odd-odd Nuclei

Signature inversion in odd-odd nuclei is investigated by using a proton and a neutron coupling to the coherent state of the core. Two parameters are employed in the Hamiltonian to set the energy scales of rotation,neutron-proton coupling and their competition. Typical level staggering is extracted from the calculated level energies. The calculation can approximately reproduce experimental signature inversion. Signature inversion is attributed to the rotational motion and neutron-proton residual interaction having reversed signature splitting rules. It is found signature inversion can appear at axially symmetric shape and high-K band.

High-spin states and signature inversion in odd-odd ^(182)Au

High-spin states in 182Au have been produced and studied via the 152Sm(35Cl,5nγ)182Au reaction. The level scheme consisting of the πh9/2(*)Vi13/2 and πi13/2(*)V i13/2 bands has been established for the first time. The low spin signature inversion in both bands has been found. The observed signature inversion phenomena can be interpreted qualitatively using the pairing and deformation self-consistent cranked Wood-Saxon calculations.

线列型读出电路奇偶相互影响问题研究

线列型探测器适用于扫描成像系统,能够满足高速移动物体成像需求。同时,为了提高像元响应均匀性和信噪比,该类型读出电路通常会采用TDI(time delay integration)结构。而随着应用需求的提升,线列规模也不断发展。阵列规模的增加、像元间距的减小带来线列电路一系列共有问题,其中一项便是奇偶像元相互影响。表现在实际应用中为奇偶通道输出差异和奇偶像元在成像时出现拖影现象。本文针对该现象,深入的研究、分析和定位产生这些现象的原因,并采取一系列相应的措施减轻和消除这些现象,提高扫描成像质量。

梅花图的四种同源标号

利用梅花图的一种称之为“源标号”的辅助标号,分别给出了梅花图的奇优美标号、奇强协调标号、(k,d)-算术标号、k-优美标号。

具有公共边的双圈图的奇优美标号及其算法

文章对于有1条公共边的一类双圈图的奇优美标号进行了研究,运用算法分析的思想设计了奇优美标号算法,得出了其奇优美标号,并证明了这类双圈图是奇优美图等结论。

具有奇优美性的一类龙图

根据复杂网络研究的需要,定义了(k,m)-龙图和一致(k,m)-龙图,这类图具有优美性、奇优美性等性质.主要研究了这类龙图的奇优美性,定义了这类龙图的奇优美标号,其证明方法可算法化.

双圈图G(n,m)的奇优美标号及其算法

文章对于一条路连接2个单圈图生成的一类新的双圈图进行了研究,运用算法分析与设计的思想设计了奇优美标号算法,得出奇优美标号,并给出了此类双圈图是奇优美图等结论。

奇–奇数聚酰胺1111的铁电与压电性研究

采用热压法制备了奇–奇数聚酰胺(PA)1111铁电薄膜,研究了PA1111的铁电性,并通过探讨极化温度(Tp)、极化时间(tp)和极化电场强度(Ep)对PA1111压电应变常数(d33)的影响来研究PA1111的压电性。结果表明,在频率0.1 Hz,外加电场150 MV/m的条件下,PA1111的矫顽电场(Ec)约为75 MV/m,剩余极化强度(Pr)达47 m C/m2。在相同的测试条件下,PA1111的Ec接近于PA11,但Pr比PA11的低,两者的压电性能相差不大。极化工艺研究表明,随着tp增加,PA1111的d33先迅速增大后趋于稳定;随着Ep的增加和Tp的升高,PA1111的d33随之增大。在Tp为75℃,tp为30 min,Ep为50 MV/m的条件下,PA1111的d33达-3.9 p C/N,压电电压常数达-169 m V·m/N。

累积比数Logistic回归模型及其应用

在临床医学中评价某种疾病的不同治疗方案效果,进行影响因素分析,可以优化治疗方案,也为制定医疗保障补偿方案提供科学依据.应用累积比数Logistic回归模型,以1 117例急性心肌梗塞(AMI)患者的治疗效果为因变量,以其影响因素为自变量,进行回归分析,找出对治疗效果影响显著的因素.结果表明应用该模型拟合有序多分类变量数据是有效的.

偏比例优势模型在有序分类资料中的应用

目的探讨偏比例优势模型在有序分类资料中的应用。方法利用在陕西某地开展的一项前瞻性研究数据,分别采用比例优势模型和偏比例优势模型进行分析,对二者的结果进行比较。结果当资料不符合比例优势假定时,偏比例优势模型分析结果的标准误低于比例优势模型。结论当有自变量不符合比例优势假定条件时,偏比例优势模型是更为合理的选择。