Single Crystal Growth and Magnetoresistivity of Topological Semimetal CoSi

We report single crystal growth of CoSi, which has recently been recognized as a new type of topological semimetal hosting fourfold and sixfold degenerate nodes. The Shubnikov–de Haas quantum oscillation(QO) is observed on our crystals. There are two frequencies originating from almost isotropic bulk electron Fermi surfaces, in accordance with band structure calculations. The effective mass, scattering rate, and QO phase difference of the two frequencies are extracted and discussed.     

V-fold交叉验证和BP神经网络在信用评价中的应用

研究关于公司神经网络信用评估问题的现状，提出一套甄选方法准则。用于建立适合于我国企业的信用评分指标体系；然后依据该指标体系建立了基于BP回归神经网络的信用评估模型；采用V—fold交叉验证技术，利用样本公司实际指标数据对该模型的评分效果进行了实证研究。     

MC模式下顾客需求与厂商供应的纳什均衡

在大规模定制(MC，Mass Customization)模式下，基于市场需求的复杂化，厂商对个性化的顾客需求很难做出及时准确的反应，而且由于其自身生产能力的限制，不可能对所有的个性化用户进行一一地满足，只可能对已经存在的个性化需求，根据自身的生产能力和规模，以利润最大化及顾客对产品的满意度为目标，对个性化需求进行较准确地预测，从而正确指导生产。本通过博弈论的方法，提出了一个基于顾客对产品的满意度及企业的利润的一个非合作博弈模型，并给出求解纳什均衡的方法。     

变维数自适应神经模糊推理策略及财务诊断应用

提出一种基于主成分分析的变维数策略，用以克服自适应神经模糊推理系统(ANFIS)难以适应数据多维数情况的缺陷。然后结合企业财务分析领域的特点，将优化的自适应神经模糊推理系统应用于公司财务状况诊断。最后，利用样本公司实际指标数据对模型的诊断能力进行了实证研究，结果显示了这种方法的优越性。     

Single crystal growth,structural and transport properties of bad metal RhSb_2

We have successfully grown an arsenopyrite marcasite type RhSb2 single crystal, and systematically investigated its crystal structure, electrical transport, magnetic susceptibility, heat capacity, and thermodynamic properties. We found that the temperature-dependent resistivity exhibits a bad metal behavior with a board peak around 200 K. The magnetic susceptibility of RhSb2 shows diamagnetism from 300 K to 2 K. The low-temperature specific heat shows a metallic behavior with a quite small electronic specific-heat coefficient. No phase transition is observed in both specific heat and magnetic susceptibility data. The Hall resistivity measurements show that the conduction carriers are dominated by electrons with ne = 8.62 × 10¹⁸ cm^-3 at 2 K, and the electron carrier density increases rapidly above 200 K without change sign. Combining with ab-initio band structure calculations, we showed that the unusual peak around 200 K in resistivity is related to the distinct electronic structure of RhSb_2. In addition, a large thermopower S(T) about -140 μV/K is observed around 200 K, which might be useful for future thermoelectric applications.     

野生葛不同部位铜、锌、铁、钙、镁含量测定

用硝酸、高氯酸混合酸消解样品,采用原子吸收光谱法,测定了河南大别山区野生葛不同部位即葛根、葛藤、葛叶及花蕾中铜、锌、铁、钙、镁的含量,并对其结果进行了分析。结果显示：葛根、葛藤、葛叶及葛花中含有丰富的宏量元素钙、镁和有益的微量元素铜、锌、铁。铜的分布量依次为：叶〉花蕾〉葛藤〉葛根;锌的分布量依次为：叶〉花蕾〉葛藤〉葛根;铁的分布量依次为：葛根〉葛藤〉叶〉花蕾;钙的分布量依次为：叶〉葛根〉花蕾〉葛藤;镁的分布量依次为花蕾〉葛根〉叶〉葛藤。测定结果为探讨中草药中宏量、微量元素与治疗心脑血管疾病功效的关系提供了有用的数据;测定结果还显示：葛叶中铜、锌、钙含量居其他部位含量之首,适宜大力开发葛叶产品。