重离子碰撞两体关联输运理论──Ⅰ．理论模型：相干态表象的构造与基本运动方程

应用相干态表象和两体关联动力学，建立了非相对论重离子碰撞两体关联输运理论ＴＢＣＴＴ（Ｔｗｏ—ＢｏｄｙＣｏｒｒｅｌａｔｉｏｎＴｒａｎｓｐｏｒｔＴｈｅｏｒｙ）．这一理论包括了时间相关的平均场．泡利阻塞和两体碰撞效应，它能够描述重离子碰撞过程中非均匀核物质的演化、涨落效应和碎裂的动力学形成．     

GPS／捷联惯性组合导航系统的一种半实时算法

本文讨论了ＧＰＳ／捷联惯性组合导航系统的原理和特点，针对其理论仿真和工程实现中的衔接问题，提出了一种半实时算法。该算法既继承了理论仿真方便、直接的优点；又充分利用了实测数据。系统调试成功后，可以直接将全套软件转换到导航计算机中。文中给出了半实时算法的原理和方案，讨论了组合卡尔曼滤波器的实现和ＧＰＳ仿真器、航迹仿真器、惯性器件等的设置。最后给出了有关结论。     

HJL-1捷联惯性航姿系统的工程实现

捷联惯性航姿系统是一类低成本的惯性导航系统，它主要用于输出三维姿态，并能直接输出与载体坐标系一致的三轴角速率和线加速度，便于自动驾驶仪和制导系统应用。本文以实际研制的ＨＪＬ－１捷联惯性航姿系统为例，讨论了整体系统组成原理，导航算法的实现，包括四元数姿态方程、修正方式、初始对准以及计时中断的实现等；文中还介绍了由Ｃ语言编制的导航软件结构和ＣＳＤＢ通讯的处理思想；最后给出了工程样机实验情况的说明。     

镶嵌固体润滑滑板的试制及其在三吨蒸汽锻锤上的应用研究

选用了一种以石墨为基料的固体润滑剂,在滑动面上能够形成均匀分布的转移膜,其在500℃高温下的润滑性能稳定,并能抵抗环境灰尘的干扰,具有良好的修补再生能力。这种固体润滑剂的热膨胀系数比钢的小,然而用其制作的镶嵌固体润滑滑板在3吨蒸汽锻锤上连续使用半年的月均磨损量仅为0.1mm,只是11~#汽缸油润滑时的1/10。这表明在高温场合下,镶嵌用固体润滑剂的热膨胀系数不一定要比金属基材的大。     

Determination of Meropenem and Ertapenem in Lagoon Water,Bedding Soil,and Silage by High-Performance Liquid Chromatography–Tandem Mass Spectrometry

A simple and sensitive method was developed and validated by high-performance liquid chromatography–tandem mass spectrometry (HPLC–MS/MS) for the determination of meropenem and ertapenem in environmental materials from dairy farms. The limits of quantification were between 1 and 20?ng/mL for the analytes in lagoon water, bedding soil, and silage. The recoveries for meropenem and ertapenem exceeded 80%. The intraday and interday precision values were less than 15% in all samples. The validated method was employed to determine the meropenem and ertapenem in environment samples obtained from dairy farms.     

Physical layer data encryption using two-level constellation masking in 3D-CAP-PON

A novel physical layer data encryption scheme using two-level constellation masking in three-dimensional(3D)carrier-less amplitude and phase modulation(CAP)passive optical network(PON)is proposed in this Letter.The chaotic sequence generated by Chua’s circuit model realizes two-level encryption of displacement masking and constellation rotation for3 D constellations.We successfully conduct an experiment demonstrating 8.7 Gb/s 3 D-CAP-8 data transmission over25 km standard single-mode fiber.With two-level constellation masking,a key space size of 2.1×1085 is achieved to bring about high security and good encryption performance,suggesting broad application prospects in future short-range secure communications.     

重离子碰撞两体关联输运理论的初步结果和守恒定律

为检验重离子碰撞的两体关联输运理论,对在各种不同相互作用条件下的理论计算结果进行了比较和分析,同时对重离子碰撞过程的守恒定律进行了计算和讨论.计算结果表明,物理量的时间演化过程,符合重离子碰撞动力学过程的一般行为.     

Multifragmentation Process in HIC Simulated by Modified Quantum Molecular Dynamics

The collision dynamics and yields of the multifragmentation in intermediate energy heavy ion collisions are simulated within the frame of the modified quantum molecular dynamics(MQMD ).With this new MQMD,it is found that the obvious improvements about the agreements between the experimental data and the simulating results for the fragment production by means of MDI and Pauli potential are achieved.Meanwhile the different influences of MDI and Pauli potential on the collision dynamics of intermediate energy heavy ion collisions are obtained.Finally the possible reasons for the discrepancies between the experimental data and the present simulating results and remedies of these deficiencies are discussed in detail.     

轴上水配位的十四元六氮大环Co(Ⅱ)配合物的合成及反常磁性的研究

本文合成了轴水配位的十四元六氮大环Co(Ⅱ)配合物,进行了元素分析、波谱、磁化率及电导等测定,发现该配合物具有反常磁性(室温磁矩为3.13BM),据此我们使用了Co(Ⅱ)离子自旋态的²E-⁴T₁模型,从理论上较好解释了该配合物的反常磁行为。