Spin-Isospin Excitations and Muon Capture by Nuclei

By analyzing the energy-weighted moments of the strength function calculated in RPA and beyond it is shown that the explanation of the effect of missing strength of Gamow-Teller transitions requires that residual interaction produce high-excited $1^{+}$ particle-hole collective states. The example of this interaction is presented. The manifestations of spin-isospin nuclear response in nuclear muon capture are discussed.Comment: 16 pages, 5 figures, 2 tables. The talk at the XVI International School on Nuclear Physics, Neutron Physics and Nuclear Energy, September 19-26, Varna, Bulgari

Atmospheric neutrino and Long Baseline neutrino experiments

The results obtained by several experiments on atmospheric neutrino oscillations are summarized and discussed. Then the results obtained by different long baseline neutrino experiments are considered. Finally conclusions and perspectives are made.Comment: Invited Lecture at the Carpatian Summer School of Physics 2007, Sinaia, Romania, August 200

Refractive effects in the scattering of loosely bound nuclei

A study of the interaction of loosely bound nuclei 6,7Li at 9 and 19 AMeV with light targets has been undertaken. With the determination of unambiguous optical potentials in mind, elastic data for four projectile-target combinations and one neutron transfer reaction 13C(7Li,8Li)12C have been measured on a large angular range. The kinematical regime encompasses a region where the mean field (optical potential) has a marked variation with mass and energy, but turns out to be sufficiently surface transparent to allow strong refractive effects to be manifested in elastic scattering data at intermediate angles. The identified exotic feature, a "plateau" in the angular distributions at intermediate angles, is fully confirmed in four reaction channels and interpreted as a pre-rainbow oscillation resulting from the interference of the barrier and internal barrier farside scattering subamplitudes.Comment: 19 pages, 14 figures, 3 tables to submit to Phys. Rev.

数据挖掘在市场营销中的应用

本文主要研究数据挖掘在市场营销中的应用，目标是为了满足用户需求，自动处理大量的原始交易数据，从中识别重要和有意义的关联规则。将关联规则挖掘应用于市场营销有助于识别顾客购买行为，发现顾客购买模式和趋势，改进服务质量，取得更好的顾客保持力和满意程度，提高货品销量比率，设计更好的货品运输与分销策略，减少商业成本。因而将数据挖掘技术应用于市场营销领域中具有重要的意义。 超量数据是数据挖掘中经常遇到的技术难题。为能从大量数据（特别是大型数据库）中有效地抽取信息，数据挖掘算法必须是高效的。本课题组的研究重点正是针对关联规则的一序列挖掘和更新算法进行探讨，并将其应用到市场营销中。努力实现一个具有实际应用价...This thesis presents a description of data mining applied in the marketing. It aims at assisting humans in extracting useful information (knowledge) from the rapidly growing volumes of data. Data mining and knowledge discovery techniques are more important to understand user behavior better, to improve the service provided, and to increase the business opportunities. In response to such a demand, ...学位：工学硕士院系专业：计算机与信息工程学院计算机科学系_计算机应用技术学号：19992800

Trojan Horse Method experiments with radioactive ion beams

The Trojan Horse Method (THM) is an indirect method that allows to get information about a two body reaction cross-section even at very low energy, avoiding the suppression effects due to the presence of the Coulomb barrier. The method requires a very accurate measurement of a three body reaction in order to reconstruct the whole kinematics and discriminate among different reaction mechanisms that can populate the same final state. These requirements hardly match with the typical low intensity and large divergence of radioactive ion beams (RIBs), and experimental improvements are mandatory for the applicability of the method. The first reaction induced by a radio activeion beam studied by applying the THM was the 18F(p,α)15O. Two experiments were performed in two different laboratories and using different experimental set-ups. The two experiments will be discussed and some results will be presented

A NOVEL APPROACH TO MEASURE THE CROSS SECTION OF THE 18O(p, α)15N RESONANT REACTION IN THE 0-200 keV ENERGY RANGE

The 18O(p, α)15N reaction is of primary importance to pin down the uncertainties, due to nuclear physics input, affecting present-day models of asymptotic giant branch stars. Its reaction rate can modify both fluorine nucleosynthesis inside such stars and oxygen and nitrogen isotopic ratios, which allow one to constrain the proposed astrophysical scenarios. Thus, an indirect measurement of the low-energy region of the 18O(p, α)15N reaction has been performed to access, for the first time, the range of relevance for astrophysical application. In particular, a full, high-accuracy spectroscopic study of the 20 and 90 keV resonances has been performed and the strengths deduced to evaluate the reaction rate and the consequences for astrophysics