二辛酯的提取

对于在制备二辛酯工艺过程中所用活性炭里吸附的二辛酯作了溶剂提取方面的研 究．对几种常用溶剂进行试验，选出最佳溶剂及提取方法．     

Simultaneous synthesis of different structures of calcium oxalate by living bi‐template

Biomimetic living bi‐templates, mung bean sprouts (MBS), were employed to control the crystallization of calcium oxalate dehydrate (COD). Two kinds of crystals in different shapes were simultaneously grown on the outer surface and the inner stem wall of MBS respectively. The whole process is in the living system that material flow and energy exchange ceaselessly. The products were respectively characterized by SEM, XRD. A presumable mechanism is proposed. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Hydrothermal synthesis and structure of a 2D supramolecular framework with right‐ and left‐helices based on mixed ligands

An exploration of the cobalt‐OH‐BDC‐bpp system under hydrothermal conditions, has led to the isolation of a novel framework [Co(OH‐BDC)(bpp)_0.5(H₂O)]_n (OH‐BDC = 5‐hydroxyisophthalic acid, bpp = 1,3‐bi(4‐pyridyl)propane). Single‐crystal X‐ray analysis reveals that it crystallizes in the monoclinic space group P2₁/n. a = 10.235(8) Å, b =17.882(14) Å, c = 14.291(11) Å, β = 92.107(9)°.The cobalt ions are linked into an extended helical chain via OH‐BDC and mono‐coordinated bpp ligands through hydrogen‐bonding interactions. Further these helical chains are united together through the bridging bpp to form a 2D layer and the adjacent chains possess the opposite chirality. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

五元联系数在高职院校学生综合素质评价中的应用

学生综合素质评价是高校素质教育测量的重要侧面,其综合素质的概念、评价指标内容的确定、权重的分配及评价方法选定直接影响着学生评价的客观性和公正性,采用"三选"法概括评价指标,用矩阵法确定各指标的权重,利用五元联系数建立数学模型试行评价,最后算例表明了它的有效性和实用性.     

Synthesis of a novel polyphosphazene/triazine bi‐group flame retardant in situ doping nano zinc oxide and its application in poly (lactic acid) resin

A novel polyphosphazene/triazine bi‐group flame retardant in situ doping nano ZnO (A4‐d‐ZnO) was synthesized and applied in poly (lactic acid) (PLA). Fourier transform infrared (FTIR), solid state nuclear magnetic resonance (SSNMR), X‐ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), and energy dispersive spectrometer (EDS) were used to confirm the chemical structure of A4‐d‐ZnO. The thermal stability and the flame‐retardant properties of the PLA composites were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), limiting oxygen index (LOI), vertical burning test (UL‐94), and micro combustion calorimeter (MCC) test. The results of XPS showed that A4‐d‐ZnO has been synthesized, and the doping ratio of ZnO was 7.2% in flame‐retardant A4‐d‐ZnO. TGA results revealed that A4‐d‐ZnO had good char forming ability (40 wt% at 600°C). The results of LOI, vertical burning test, and MCC showed that PLA/5%A4‐d‐ZnO composite acquired a higher LOI value (24%), higher UL94 rating, and lower pk‐HRR (501 kW/m²) comparing with that of pure PLA. It indicated that a small amount of flame‐retardant A4‐d‐ZnO could achieve great flame‐retardant performance in PLA composites. The catalytic chain scission effect of A4‐d‐ZnO could make PLA composites drip with flame and go out during combustion, which was the reason for the good flame‐retardant property. Moreover, after the addition of A4‐d‐ZnO, the impaired mechanical properties of PLA composites are minimal enough.     

双预应力混凝土足尺梁的试验研究

该文对双预应力混凝土足尺梁进行了试验研究，测出了双预应力混凝土梁在受载后的应变和挠度，并用有限元素法进行了分析计算。研究结果显示，双预应力混凝土足尺梁具有良好的受力特性，能够有效地降低梁高，并且在正常使用阶段比普通预应力混凝土梁有更好的工作性能。     

SL(2,R)上的双不变函数的Winer型定理

本文给出了SL(2,R)上的双不变函数的Winer定理.     

双靶反应溅射Ti-B-N复合膜的研制

采用基片架旋转的多靶磁控溅射仪，通过六方氮化硼（ｈ－ＢＮ）和Ｔｉ靶反应溅射制备Ｔｉ－Ｂ－Ｎ复合薄膜，并用ＡＥＳ、ＸＲＤ和ＴＥＭ等方法研究了薄膜的微结构．结果表明，室温下沉积薄膜均呈非晶态，经过４００°Ｃ热处理薄膜晶化．基片加热为４００°Ｃ沉积的薄膜则已晶化，ＴＥＭ分析确定薄膜结构为ＴｉＮ结构．显微硬度表征发现，室温沉积Ｔｉ与ｈ－ＢＮ的原子数约为２∶１时的薄膜达到最高硬度ＨＫ２６００．     

杯[4]双硫脲化合物的合成及其对H_2PO_4~-的络合作用

从对叔丁基酚出发合成了对叔丁基杯[4],经脱叔丁基后,下缘羟基用正丁基保护,上缘5,17 位二硝化,还原胺化,进一步硫脲化得到目标分子双硫脲杯[4]化合物——5,17-双(N'-苯基硫脲)-25,26,27,28-四正丁基杯[4]. 测定了此主体分子与H2PO-4 有强的氢键络合作用     

An elliptic equation under the effect of two nonlocal terms

The aim of this note is to investigate the existence of signed and sign‐changing solutions to the Kirchhoff type problem (0.1) where Ω is a bounded smooth domain in (N = 1,2,3), a,b > 0 and 2 < p < 2^?, with 2^?=+∞ if N = 1,2 and 2^?=6 if N = 3. Using variational methods, we show that (0.1) possesses three solutions of mountain pass type (one positive, one negative and one sign‐changing) and infinitely many high‐energy sign‐changing solutions. Copyright © 2015 John Wiley & Sons, Ltd.