期末二次订购下风险规避且促销的收益共享契约协调研究

在期末二次订购下,利用CVaR准则考察收益共享下销售商风险规避且促销的决策问题,并得到一些有意义的管理启示。讨论了风险中性制造商在两生产模式下的生产决策。探讨了收益共享措施的协调问题,分析了各参数的关系,获得如下启示:销售商越是风险规避,首次订购量越少;制造商的首次生产量不一定是首次订购量,在有二次订货情况下可以投机生产来获得额外利润;在收益共享措施下,批发价固定,要风险态度不同的销售商订购等量的商品,风险规避度大的销售商,分享收益的比例小;如果制造商想要收益共享比例增大,那么首次批发价就要降低。     

New Quantum Codes Derived from Cyclic Codes

International Journal of Theoretical Physics - In this paper, we construct optimal or almost optimal dual-containing cyclic codes from cyclotomic classes of order r. Based on these cyclic codes...     

Study on comparison of reducing ability of three organic hydride compounds

Selective reduction of three kinds of substrates were studied to evaluate the reducing abilities of N,N-dimethyl-benzimidazolidine (DMBI), 2-phenylbenzimidazoline (PBI) and 2-phenylbenzothiazoline (PBT). As hydride donors, these three five-membered heterocyclic compounds performed different reducing abilities depending on the substrates.     

Dissipativity-based resilient reliable sampled-data asynchronous control for interval-valued fuzzy systems with semi-Markovian hybrid fault coefficients

Nonlinear Dynamics - This article addresses the dissipativity-based nonfragile reliability sampled-data asynchronous synthesis problem for nonlinear networked control systems approximated by...     

Bulky iminophosphine-based nickel and palladium catalysts bearing 2,6-dibenzhydryl groups for ethylene oligo-/polymerization

A series of 2,6-dibenzhydryl substituted bulky Ni and Pd complexes containing P,N-chelating ligands, {[2,6-(Ph₂CH)₂-4-R-C₆H₂-N=CH-C₆H₄-2-PPh₂]MX₂; MX₂ =NiBr₂; R = Me ( Ni1 ); R = F ( Ni2 ); MX₂ =PdCl₂, R = Me ( Pd1 )}, have been prepared and used as catalyst precursors for ethylene oligo-/polymerization. Compared to the corresponding 2,6-diisopropyl Ni catalyst, these bulky Ni precatalysts activated by Et₂AlCl exhibited excellent catalytic performance toward ethylene polymerization with activity of up to 1.90 × 10⁵ g PE (mol Ni)⁻¹ h⁻¹, and result in semicrystalline PEs with high molecular weight. The catalytic performance of these bulky P,N-type complexes was significantly improved by introducing two ortho-dibenzhydryl on the N-aryl substituents. However, the formation of C₁₀–C₂₄ oligomers were generated using their palladium catalysts through ethylene oligomerization at high temperatures.     

Internal friction related to viscous motion of phase interfaces during thermoelastic martensitic transformation

Two internal friction peaks were observed in CuAlNiMnTi polycrystalline shape memory alloy by a partial phase transition method in non-isothermal measurements. The low-temperature internal friction peak arising from the soft mode effect caused by the viscous movement of atoms along phase interfaces was studied in the present study in terms of internal friction fundamentals. An internal friction model related to the peak was established, which was shown to be in good agreement with experimental results.     

Hierarchical Porous N-Doped Carbon Nanosheets Obtained by Organic–Inorganic Bipolymeric Engineering for Improved Lithium–Sulfur Batteries

A new route for obtaining N-doped carbon nanosheets through an in situ solid-state thermal organic–inorganic polymerization and carbonization method, with glucose and melamine as precursors, due to different temperature intervals for glucose or melamine polymerization, is reported. At a current rate of 0.2 C, as a cathode for a lithium–sulfur cell, the N-doped carbon nanosheet/sulfur hybrid delivers a high capacity of 1313 and 722 mA h g⁻¹ in the 1st and 200th cycles, respectively; these values are over 40 % higher than that of cells with glucose-derived carbon nanosheets.     

Phase control of squeezed state in double electromagnetically induced transparency system with a loop-transition structure

We theoretically study the squeezed probe light passing through a double electromagnetically induced transparency (DEIT) system, in which a microwave field and two coupling lights drive a loop transition. It is shown that the output squeezing can be maintained in both two transparency windows of DEIT, and it can also be manipulated by the relative phase of the three driving fields. The influence of the intensity of applied fields and the optical depth of atoms on the squeezing is also investigated. This study offers possibilities to manipulate the squeezing propagation in atomic media by the phase of electromagnetic fields.     

Ir(III)螯合物催化醚的硅氢化反应中负氢来源的机理研究

采用DFT方法对Ir（Ⅲ）螯合物催化乙醚硅氢化生成乙烷和乙基硅醚的反应展开理论研究.反应中[H-Ir-H]，[H-Ir-Si]，[Ir（HSiEt₃）]和[Et₃Si-Ir-（H）₃]化合物均为可能的负氢来源.理论研究表明[H-Ir-H]化合物是最优势的负氢来源.通过扭曲-相互作用能分析，发现其他三种可能的负氢来源不优势的原因在于HSiEt₃或SiEt₃基团对铱中心的络合.更为重要的，我们发现[H-Ir-H]化合物中适中的Ir-H键解离能，小位阻以及SiEt₃对醚的络合而产生的促进作用共同使得[H-Ir-H]化合物上的负氢转移相对优势.     

Jacobsthal sums and permutations of biquadratic residues

Let $p\equiv 1(\mathrm{mod}4)$ be a prime. In this paper, with the help of Jacobsthal sums over finite fields, we study some permutation problems involving biquadratic residues modulo p.