液相色谱-串联质谱外标法定量分析中基质效应的评估

以苯巯基尿酸为目标化合物,考察了色谱分离条件(即强洗脱、弱洗脱及梯度洗脱)对采用外标法定量的液相色谱-串联质谱(LC-MS/MS)分析中基质效应的影响。试验表明:①对无基质标准溶液的分析,以强洗脱条件下的灵敏度最高,且可实现高通量分析;②对同一基质不同浓度的试液,弱洗脱条件的基质效应明显改善,而梯度洗脱的结果最好;③对不同来源的基质和不同浓度的试验,在3种不同的色谱分离条件中以梯度洗脱效果最好,提高了分离度,减少了共流出,有效地降低了基质效应对目标物分析的影响。因此,在LC-MS/MS分析中,色谱分离条件的改善对降低基质效应对测定的影响十分重要。     

利他扰动与Nash均衡点集的利他稳定性

引入了一个新的利他扰动.定义了KyFan点集的利他本质集,进一步证明在此扰动下,KyFan点集的利他本质连通区的存在性.证明了满足一定条件的n人非合作博弈中,Nash均衡点集至少存在一个利他本质连通区,而且Nash均衡点集的每一个本质集必是利他稳定集,Nash均衡点集的本质连通区也是利他本质集连通区.     

MEMS矢量水听器灵敏度自动测试系统设计

针对微机电系统(MEMS)矢量水听器声压灵敏度测试中出现的测试步骤单一、测试任务繁重且耗时多,同时手动测量存在不确定的操作误差等问题,在分析矢量水听器灵敏度测试原理和测试过程的基础上,采用AD9850,AD8599,PGA205、单片机MK60DN512ZVLQ110等芯片,设计了集成信号激励源、微弱信号检测、调理以及信号采样和传输等模块的矢量水听器灵敏度自动测试装置。该装置将测试现场的仪器缩小,多模块功能集成,通过与PC上位机连接控制,快速、实时地完成矢量水听器灵敏度测试标定,在节约测试时间的同时,也能快速地完成对水听器的优化改进的验证；此装置体积小、轻便,测试连线简单,方便外场测试,促进MEMS水听器工程化应用。     

2010年度物理科学二处科学基金项目评审工作综述

物理科学二处主要资助基础物理、粒子物理、核物理、核技术与应用、加速器物理与探测器技术、等离子体物理、同步辐射方法与技术等领域的研究工作,同时负责受理"NSAF联合基金"、"大科学装置科学研究联合基金"、"理论物理专     

带势的非线性Klein-Gordon方程柯西问题的稳定和不稳定集

对带势的非线性Klein-Gordon方程柯西问题,我们定义了新的对于初值的稳定和不稳定集.我们证明了如果发展进入了不稳定集,解在有限时间内爆破;如果发展进入了稳定集,解整体存在.运用势并讨论,我们回答了当初值为多少时,柯西问题的整体解存在.     

Pr离子缺陷对Bi-2223／Ag带材磁通涡旋运动的影响

Pr部分替代Ca可以在Bi-2223的超导层中引起局域缺陷（简称Pr离子缺陷），本文分析了不同含Pr量的Bi-2223／Ag带材在垂直于带面的外场下电阻转变特性，研究了其磁通钉扎势垒的变化规律．结果表明：Pr离子缺陷显著提高了Bi-2223带材的磁通钉扎势垒（U）．不同含Pr量样品的磁通钉扎势垒（U）均满足U／（1-Tirr／Tco）（1／H^α的规律．其不同α值反映了样品中不同的磁通蠕动方式．在不含Pr离子缺陷的样品中．磁通主要以双弯结的方式进行蠕动，含Pr离子缺陷的样品中磁通蠕动主要以直接剪切的方式进行．     

2014年度物理科学二处科学基金项目评审工作综述

物理科学二处主要资助基础物理、粒子物理、核物理、核技术与应用、加速器物理与探测器技术、等离子体物理、同步辐射方法与技术等领域的研究工作,同时负责受理国家自然科学基金委员会—中国工程物理研究院联合基金(简称NSAF联合基金)、大科学装置科学研究联合基金、先进核裂变能的燃料增殖与嬗变重大研究计划、理论物理专款等类型项目。本文简要综述2014年度物理科学二处基金项目受理、评审情况,使广大科研人员及科研管理部门了解本年度     

Optical and mechanical properties of polyurethane/surface-modified nanocrystalline cellulose composites

in order to improve the optical and mechanical performances of waterborne polyurethane （WPU）, nanocrystalline cellulose （NCC）/WPU composites were synthesized in this study. NCC （prepared by acid hydrolysis of cotton fiber） was modified by （3-aminopropyl）triethoxysilane （APTES） to enhance its compatibility with WPU, and the surface-modified NCC was characterized by grafting ratio, crystallinity and contact angle （CA）. NCC/WPU composites were examined by scanning electron microscopy （SEM）, X-ray powder diffraction （XRD） and thermogravimetric analysis （TG）. The anti-yellowing property, specular gloss, pencil hardness, and abrasion resistance of NCC/WPU composites were investigated by the methods of Chinese National Standards GB/T 23999-2009, GB/T 9754-2007, GB/T 6739-2006 and GB/T 1768-2006, respectively. The results showed that the grafting ratio of NCC modified by 6% APTES was 36.01% and the crystallinity of modified NCC was decreased with the enhancement of APTES. CA of the modified NCC was decreased by 28.8% and the nanoparticles were homogeneously dispersed in the WPU matrix. The XRD patterns of the NCC/WPU composites were relatively steady, while the thermal stability of the composites was enhanced by 6.7% with 1.0 wt% modified NCC. Modified NCC affected the specular gloss of NCC/WPU composites more obviously than the anti-yellowing property. The pencil hardness of NCC/WPU composites was increased from 2H to 4H by addition of NCC and the abrasion resistance of the composites was enhanced significantly. In general, NCC/WPU composites showed significant improvements in the optical and mechanical performances.     

4mm回旋管用超导磁体的研制和应用

研制了一个用于4mm 回旋管的超导磁体,其主磁场达到3T.与回旋管配合产生基波长脉冲,输出功率大于60KW,脉冲宽度10—20ms,工作频率70GHz.用于 HL-1托卡马克成功地进行了等离子体预电离实验.     

Research on six-degree-of-freedom calibration system for wind tunnel balances with a collimated laser beam

A newly-developed six-degree-of-freedom calibration system for the wind tunnel balances is introduced. The frame of the system, the functions and the operating principle of different parts are presented in detail. The system is composed of four parts: the automatically loading subsystem, the automatically resetting subsystem, the data-acquisition subsystem and the measurement subsystem. The results of some cell experiments proved that the system can meet the needs of the present calibration task of the balance. Through further improvement, the system can be also used to calibrate other devices with multi degree-of-freedom and measure the minute shifts, such as the guide rail of machine tool and the assembling of large parts and so on.