8-羟基喹啉对碘离子修饰的B-Z化学振荡体系的扰动

研究了用碘化钾溶液对B-Z化学振荡反应的修饰,以8-羟基喹啉为被检测化合物考察了修饰前后B-Z化学振荡体系对环境的敏感性变化.结果表明,修饰后的B-Z化学振荡体系对8-羟基喹啉的灵敏度大为提高,在2.50×10~(-9)～3.16×10~(-11)mol/L范围内,振荡体系的周期变化值与8-羟基喹啉浓度的负对数呈现良好的线性关系,相关系数为0.9980.     

钾镁胁迫对橡胶幼苗叶片物质成分影响的FTIR表征

养分亏缺是作物产量和质量提升的重要限制因子。我国砖红壤植胶区钾、镁缺乏及其低的有效性长期制约天然橡胶的产、质量。以“热研7-33-97”橡胶幼苗为研究对象,利用傅里叶变换红外光谱（FTIR）对钾、镁胁迫下橡胶树叶片物质组成特征进行研究,分析不同钾、镁胁迫条件下叶片红外光谱图谱特征峰的变化及其差异,探讨钾、镁胁迫对叶片物质成分和结构的影响,以期为钾镁缺乏影响橡胶树生长与生理代谢的机理研究提供参考。结果表明：（1）缺钾条件下,1 554,1 519和1 075 cm-1处的吸收峰缺失,表明橡胶叶片中蛋白质酰胺Ⅱ带、酚类物质、碳水化合物的化学结构受到破坏,并且其他特征峰吸光度与正常处理相比均有不同程度的升高,表明缺钾造成蛋白质、碳水化合物等物质在叶片中大量积累,物质转运效率降低;（2）缺镁条件下,1 554 cm-1处吸收峰向高频方向位移了6 cm-1,说明缺镁造成蛋白质酰胺Ⅱ带的结构发生改变,同时,1 550~1 350 cm-1波数范围内吸收峰相对吸光度明显下降,说明缺镁降低了细胞壁多糖以及含油脂化合物的含量,且该波数范围内的三个吸收峰较其他吸收峰变化敏感,表明该波段可以较好地指示橡胶叶片镁营养状况;（3）钾镁同时缺乏条件下,各吸收峰的相对吸光度和强度明显减弱,1 554,1 519和1 075 cm-1处的吸收峰缺失,说明蛋白质酰胺Ⅱ带、酚类物质、碳水化合物的化学结构受到破坏,1 057 cm-1处吸收峰向高频方向位移了11 cm-1,表明橡胶叶片中果胶类多糖分子结构发生了变化。综上所述,缺钾造成橡胶叶片蛋白质、糖类物质的含量的大量积累,缺镁造成叶片细胞壁多糖和油脂化合物下降,而钾镁同时缺乏时蛋白质、脂类、糖类物质等物质含量均明显下降。研究表明,使用FTIR技术对养分缺乏下的橡胶叶片物质成分定性分析具有一定的可行性,同时可为橡胶钾、镁营养生理代谢的机制研究提供新的思路和方法。     

Highly sensitive polymer photodetectors with a wide spectral response range

A series of highly sensitive polymer photodetectors(PPDs) was fabricated with P3HT100-x:PBDT-TS1x:PC71BM1 as the active layers, where x represents the PBDT-TS1 doping weight ratio in donors. The response range of PPDs can cover from the UV to near-infrared regions by adjusting the PBDT-TS1 doping weight ratio. The best external quantum efficiency(EQE) values of ternary PPDs with P3HT:PBDT-TS1:PC_(71)BM(50:50:1 wt/wt/wt) as the active layers reach 830%, 720%,and 330% under 390-, 625-, and 760-nm light illumination and-10 V bias, respectively. The large EQE values indicate that the photodetectors utilise photomultiplication(PM). The working mechanism of PM-type PPDs can be attributed to interfacial trap-assisted hole tunnelling injection from the external circuit under light illumination. The calculated optical field and photogenerated electron volume density in the active layers can well explain the EQE spectral shape as a function of the PBDT-TS1 doping weight ratio in donors.     

银行贷款利息的速算

随着商品经营的发展，企义经营的大部分资金要用银行贷款来解决。现在银行根据企业的经营状况划分一至四类企业。计算利息的档次也就不同，所以，银行的贷款利息也逐步被企业的经营者所重视。为使更多的经营者掌握计算贷款利息的方法，这里介绍一种积数速算银行贷款利息的方法。     

Design of the new couplers for C-ADS RFQ

A new special coupler with a kind of bowl-shaped ceramic window for a proton linear accelerator named the Chinese Accelerator Driven System (C-ADS) at the Institute of Modern Physics (IMP) has been simulated and constructed and a continuous wave (CW) beam commissioning through a four-meter long radio frequency quadruple (RFQ) was completed by the end of July 2014. In the experiments of conditioning and beam, some problems were promoted gradually such as sparking and thermal issues. Finally, two new couplers were passed with almost 110 kW CW power and 120 kW pulsed mode, respectively. The 10 mA intensity beam experiments have now been completed, and the couplers during the operation had no thermal or electro-magnetic problems. The detailed design and results are presented in the paper.     

元素-红外分析法测定海上油田含聚油泥中聚合物的含量

注聚驱油是海上油田高效开发的重要手段. 随着注聚产液量的提升,部分返出聚合物形成的含聚油泥堵塞流程,影响到采出液处理设备运行的问题亟待解决. 通过将含聚油泥中的油、泥、聚合物分离,联合运用元素分析、红外光谱（IR）、气相色谱、X射线衍射（XRD）、分光光度法对其组成进行分析,不同取样点的含聚油泥其主要组成是含油量为22.9%~42.12%,含水量为38.34%~62.3%,含固量为14.8%~19.54%. 其中聚合物含量为3.37%~7.42%,无机矿物含量1.30%~3.74%. 含聚油泥中的原油与SZ36-1标准原油组分一致,注入聚合物AP-P4性质没有发生变化,其结果对指导含聚油泥中原油、聚合物的回收利用研究和油泥分离技术开发有重要意义.     

混凝土楔入劈拉和三点弯曲断裂过程的细观数值模拟Mesoscale simulation on fracture process of wedge splitting and three-point bending of concrete

基于离散元思想和Voronoi单元划分技术,利用混凝土细观刚体弹簧元模型,开展了混凝土楔入劈拉试件和三点弯曲切口梁的断裂过程数值仿真分析。从裂缝开展过程、试件破坏形态、荷载-张口位移曲线(P-CMOD)和断裂能等方面,将数值分析结果与已有的试验结果进行了对比。结果表明,细观刚体弹簧元法较准确地模拟了混凝土楔入劈拉试件和三点弯曲切口梁断裂过程。最后,分析了缝高比和骨料体积含量对混凝土断裂过程的影响规律,发现断裂能随骨料体积含量呈单调递增趋势。     

C-ADS注入器Ⅱ项目RFQ射频系统介绍（英）

C-ADS注入器Ⅱ的RFQ射频系统是该强流加速器的关键一环,它通过两台完全一样的耦合器为一台四边形四翼型RFQ提供和传送功率。该射频系统在设计之初就考虑为10 mA连续束流而进行特殊优化,从功率源、耦合器和功率传输系统几个方面对其进行详细介绍,尤其是针对CW模式下的系统稳定运行以及设备可靠性等方面进行的特殊考虑和模拟方法。该系统已经在2015年通过了10 mA连续束的测试,证实了该射频系统的设计和调试符合物理的实验需求。特别阐述了该系统中一种新的碗型陶瓷窗耦合器的设计思路和一种无环形器情况下的特殊的耦合系数调谐方法,同时推导了双端口耦合的计算方法的具体设置过程。     

基于窗耦合结构的HIAF RFQ高频腔体研究

作为直线加速器的前级聚焦加速部分,RFQ(射频四极场) 在束流动力学和运行稳定性上都应表现良好,需要保持电场平整和电磁强耦合。为实现这两个目标,提出并研究了窗耦合结构。针对工作频率为81.25 MHz 的1 m长模型腔,利用三维电磁仿真软件CST MWS微波工作室对传统的四翼型、四杆型高频结构进行了仿真,并重点研究了窗耦合型结构。对开窗的对称方式、开窗的个数和大小等进行了分析,发现合适的窗耦合结构能保持较为紧凑的横向尺寸同时能耗适中,同四翼型结构相比二极模频率也远离了运行频率。为验证模拟结果,建造了一个铝模型腔,并对模型腔进行了冷模测试,实测频率为81.41 MHz,相邻模频率差为10.74 MHz,与模拟结果接近。仿真模拟和模型腔测试的结果表明,窗耦合四翼型结构可作为较低频率RFQ的一种设计。As a focusing and acceleration element in front part of the linear accelerator RFQ, should have ahigh performance in both beam dynamic and operation stability. It requires the electro-magnetic field of RFQ to keep uniform and strongly coupled. In this paper the window coupled structure is proposed and investigated to meet the requirements of RFQ design. Different structures have been compared and analyzed, including four-vane type and four-rod type, and the four-vane type with windows. It was concluded that window-coupled structure is more compact in the transverse dimension with modest power loss and the dipole frequency is far from the operation frequency compare to the normal four-vane structure. A one-meter long and frequency of 81.25 MHz model-cavity of alumimum was employed as a sample and simulated by using the microwave studio of CST. The low power RF test results show that the operating frequecy is 81.41 MHz and the nearest mode frequency separation is 10.74 MHz, which is in good agreement with the simulated values. It is concluded that the window-coupled structure is a candidate for low frequency RFQ.