一般工商业零售电价套餐适应性评估与优化方法

在电力体制改革的大背景下,合理评估零售电价套餐适应性,对控制电网经营风险和推进售电侧改革有重要意义。针对我国电力市场以及一般工商业的特点,首先从竞争、用户以及市场环境角度出发建立了一般工商业零售电价套餐评估指标体系;其次将层次分析法和改进的灰色白化权函数相结合,对电价套餐进行适应性评估;最后针对该评估方法建立了基于蚁群算法的优化模型,以最小成本得到提高电价套餐适应性等级的优化方案,并验证了该方法具有良好的鲁棒性,具有一定的参考意义。     

Triple Positive Solutions of Boundary Value Problems for High-order Fractional Differential Equation at Resonance with Singularities

In this paper, we investigate the existence of triple positive solutions of boundary value problems for high-order fractional differential equation at resonance with singularities by using the fixed point index theory and the Leggett-Williams theorem. The spectral theory and some new height functions are also employed to establish the existence of triple positive solutions. The nonlinearity involved is arbitrary fractional derivative, and permits singularity.     

波在胆甾醇型液晶中斜传播问题的微扰解法

介绍了波在胆甾醇型液晶中斜传播问题准确闭式解的微扰解法,其解对各向异性参数修正到二阶无穷小．在闭式中微扰项是已知的,该方法可用于研究波在胆甾醇型液晶中斜入射的传播现象．     

The radioisotopic battery based on radio-voltaic effect

The radio-voltaic effect is investigated to be applied radioisotopic batteries in this work. The collection rates of the electron-hole pairs are 94 percent for the alpha particles emitted by²³⁹Pu source and 65 percent for the beta particles emitted by⁹⁰Sr-⁹⁰Y source. The maximum energy conversion efficiency got by the silicon element is about 16%. A prototype radioisotopic battery with¹⁴⁷Pm beta sources is constructed. Its maximum short-circuit current and off voltage are about 2 A and 190 mV respectively. The experimental data suggest that the life of the prototype battery may be more than three years.     

The synthesis and crystal structure of metal complexes S-alkyl-N-(ferrocenyl-1-methyl-methylidene)-dithiocarbazate and the study on their quenching the luminescence ofruthenium(bipyridine)_~3(2+)

The cobalt, nickel, copper, zinc and cadmium complexes of S-methyl-N-(ferrocenyl-l-methyl-methylidene)-dithiocarbazate (H-LSM) and S-benzyl-N-(ferrocenyl-l-methyl-methylidene)-dithiocarbazate (H-LSB) were synthesized and the crystal structure of Cd[Fe-C(CH3) = NNCSS. (CH3)]2 was solved by X-ray diffraction. The crystal is in the orthorhombic system with space group Pbca, cell parameters a=19.741(3), b=19.924(5), c=15.452(4) A, and the final factors of R=0.032. The study on quenching the luminescence of Ru(bpy)3 by those complexes showed that bimolecular quenching constants obtained from the Stern-Vohner constant and the excited-state lifetime were related to the redox potential of the quencher. Linear relationship is shown in the plot of logkq vs. E1/2(Q+/Q). The main factor which influences the quenching rate constant and the redox potential is the coordinating ability of the metal in the complex.     

减压蜡油缓和加氢裂化催化剂酸性研究

用热重原位氨吸附－程序升温脱附及氨吸附－差热法考察了含分子筛缓和加氢裂化催化剂的载体、活性金属组分及催化剂本身的酸性。发现载体的总酸量是其分子筛含量的线性函数。载体担载上Ｎｉ、Ｗ活性组分后，可不同程度的引起催化剂的酸性变化。催化剂中分子筛含量增加除提高其加氢裂化活性外，还可增加它的ＶＧＯ加氢脱氮及加氢脱芳烃的活性，但会引起中馏份选择性的下降。催化剂的酸性可通过载体的分子筛含量、类型及分子筛改性加以调节。     

K_3[Cr_3O(OOCH)_6(H_2O)_3][α-GeW_(12)O_(40)]·17H_2O的合成、结构及特性研究

研究了多金属氧酸盐分子基化合物K3[Cr3O(OOCH)6(H2O)3][α GeW12O40]·17H2O的合成、晶体结构及其结晶水可逆脱附和吸附性能.该化合物属于单斜晶系,C2/m空间群,a=2 7383(6)nm,b=1 5830(3)nm,c=1 7304(4)nm,β=102 43(3)°,V=7 325(3)nm3,Z=4,R1(wR2)=0 0678(0 1719).该晶体具有孔道结构,孔道内的结晶水能够可逆的脱附和吸附,而晶体结构随之恢复,因此具有分子筛的特性.     

Dense Sphene-type Solid Electrolyte Through Rapid Sintering for Solid-state Lithium Metal Battery

The sphene-type solid electrolyte with high ionic conductivity has been designed for solid-state lithium metal battery. However, the practical applications of solid electrolytes are still suffered by the low relative density and long sintering time of tens of hours with large energy consumption. Here, we introduced the spark plasma sintering technology for fabricating the sphene-type Li_1.125Ta_0.875Zr_0.125SiO₅ solid electrolyte. The dense electrolyte pellet with high relative density of ca. 97.4% and ionic conductivity of ca. 1.44×10^-5 S/cm at 30℃ can be obtained by spark plasma sintering process within the extremely short time of only ca. 0.1 h. Also the solid electrolyte provides stable electrochemical window of ca. 6.0 V(vs. Li⁺/Li) and high electrochemical interface stability toward Li metal anode. With the enhanced interfacial contacts between electrodes and electrolyte pellet by the in-situ formed polymer electrolyte, the solid-state lithium metal battery with LiFePO₄ cathode can deliver the initial discharge capacity of ca. 154 mA·h/g at 0.1 C and the reversible capacity of ca. 132 mA·h/g after 70 cycles with high Coulombic efficiency of 99.5% at 55℃. Therefore, this study demonstrates a rapid and energy efficient sintering strategy for fabricating the solid electrolyte with dense structure and high ionic conductivity that can be practically applied in solid-state lithium metal batteries with high energy densities and safeties.     

含氨基酸侧链的有机硅高分子催化剂——聚γ-(色氨酸基)丙基硅氧烷钯催化剂的合成及加氢活性

本世纪60年代以来,Overberser等把存在于酶中的催化基团引入聚合物中,合成了一系列类酶聚合物催化剂。氨基酸是酶分子中的重要组成部分,它们分子中所含的氨基、羧基等均可络合金属离子形成催化剂的活性中心,氨基酸残基又可造成不同的配位环境,因此,用氨基酸作侧链合成类金属酶高分子催化剂有可能提高催化活性和选择性。     

Synthesis of a Polymer-bound Sensitizer and its Application in the Photoisomerization of trans-Vitamin D_3 to cis-Vitamin D_3

The photochemistry of the vitamin D family and their precursors has been the subject of extensive studies for many years1-4. Most of the studies focus on the photoisomer- ization of 7-dehydrocholesterol and that of tachysterol to previtamin D3, which is of commercial importance in the synthesis of vitamin D34, 5. Recently the cis/trans isomerization of vitamin D analogs (Scheme 1) draws attention because of its importance in the synthesis of hydroxylated vitamin D metabolites6. However, o…