OCAD与其他光学设计程序及应用软件的链接和互动

介绍了OCAD(optical CAD)光学设计软件包与国内外其他著名光学设计软件，如美国ORA公司的CodeV，Focus Software公司的Zemax，还有OSLO、LENSVIEW、ASAP和TRACEPRO等，以及国内SOD 88等的链接及互动方法。指出OCAD光学设计软件包本身不仅具有光学设计软件最基本的功能，而且可以利用自身功能界面随时调用上述软件程序为其所用，做到各程序间有效链接，行为互动;OCAD光学设计软件包还可以和文字处理及工作报表等通用程序，如Word和Excel等程序进行链接和互动。针对我国光学设计和光学制图的国家标准，部颁标准及企业标准推出了面向国内的OCAD光学设计软件包。提出目前国内外有关光学设计软件的功能及特点已非常丰富，没必要重复研制内容相同的新软件，只有针对自身的特殊需要研制一些专用应用软件即可。     

机载多功能调压器的设计和实现

根据国内机载调压器的调压速度快、具备故障保护功能以及可配置的调压时机等需求特点,提出了机载多功能调压器设计和实现。首先介绍了快速调压功能的原理;其次,在快速调压功能的基础上,详细阐述机载多功能调压器中高相限制、过流保护、数字保护扩展接口和禁止调压等新增功能的设计。本机载多功能调压器已成功运用于飞机交流发电机的控制中。实践证明,本方案运行可靠,成本低廉,具有良好的经济效益。     

二组元变焦距系统辅助设计的软件研究

虽然常用的光学设计软件能够对具有良好的初始解的变焦距系统进行光路的优化计算,但它们对初始系统本身的构建和设计缺乏足够的支持能力。论述了一种二组元变焦距初始系统辅助光学设计软件的设计思路。该程序大大简化了设计人员选择和验证初始系统的计算过程,通过与常用光学设计软件(Zemax和SOD88)的交叉配合,可充分利用它来校正像差和优化系统的性能,能很快地完成变焦距初始系统的构建和评价。实践证明:该软件能够大大加快变焦距系统的设计进程。     

基于ispPAC的精密放大器的设计

本文介绍了可编程模拟器件的功能特点，列举了利用可编程模拟器件设计精密放大器的方法。     

利用CODE V设计含有自由曲面的光学系统

由于自由曲面灵活的空间布局和设计自由度，使光学系统的结构得到了简化，像质得到了提高。本文通过设计实例详细介绍了在光学设计软件CODE V中运用用户自定义面型UDS（user defined surface）的功能和计算机动态链接库DLL(dynamic link library)软件技术设计含有自由曲面光学系统的方法。通过利用此方法设计了球面和锥面光学系统，验证了其准确性和可靠性。并且利用此项技术设计了含有自由曲面的光学系统，使光学系统达到了质量轻、体积小的设计目标。此项技术扩充了CODE V软件的功能，有效地拓宽了CODE V计算复杂面型的能力。     

《建筑厅堂音质设计》简介

建筑声学的理论和实践已有１００多年的历史．虽然对于要求高质量音乐演出的厅堂,仍然存在着需要进一步探讨的原理和处理技术,但总的来说,对于不同功能的厅堂,在声学要求上已有一系列音质设计的准则和方法．对于从事建筑设计的工程技术人员,却有时难以全面掌握音质设计的基础要求． 王季卿教授新著《建筑厅堂音质设计》一书（２００１年 １月由天津科技出版社出版）,全面论述了音质设计的原理和技术：既阐述了系统的基础理论,又介绍了最新的研究进展;既讲清了音质设计中的声学原理,又对各种功能的厅堂介绍了典型的设计实例,使设计…     

船舶分油机模拟器设计与实现

针对分油机控制系统的仿真设计落后于当前先进控制系统的问题,提出了一种以Alfa Laval S系列分油机的EPC-60控制系统为母型的分油机模拟控制系统。介绍了分油机模拟器的整体结构,设计了以ARM为主控元件的仿真控制箱,实现了网络通信、液晶显示、按键扫描等功能。采用Visual C#编程语言在PC机上设计出仿真控制界面。实验结果表明：基于EPC-60为母型控制系统的分油机模拟器具有功能全、运行稳定、和实物相似度高的优点,能够实现轮机教学实验和海员培训的功能。     

智能定标器的设计与实现

介绍使用现代EDA手段设计定标器的原理和实现方法。新的定标器利用FPGA技术实现对系统中大量电路进行集成，结合AT89C51单片机进行控制和处理，并增加数据存储功能和RS232接口，简化了系统结构。     

带有STC功能的接收机中频组件的设计

本文介绍了带有STC功能的接收机中频组件的设计,它动态范围宽,输出饱和电平大,选择性好,响应时间快.同时,对系统的电磁干扰加以讨论,并介绍了抗干扰的有效措施.     

嫦娥一号卫星干涉成像光谱仪时序设计

介绍了基于Actel反熔丝FPGA的嫦娥一号卫星干涉成像光谱仪时序控制模块设计.概述了时序控制模块的功能要求,详细描述了时序控制模块外部时序接口和内部时序接口,给出了时序控制模块设计的参量配置、逻辑结构和简要结果.各项地面试验和一年的在轨飞行结果表明该设计合理可靠.     

荧光光谱分析超氧化物歧化酶的构象变化及其功能

通过荧光光谱研究了枯草芽孢杆菌超氧化物歧化酶(SOD)的分子构象在不同浓度盐酸胍、尿素以及不同pH条件下的变化及其与功能的关系.结果表明,SOD构象与功能的变化与其荧光光谱的变化有明显的对应关系.随着盐酸胍浓度的增加,SOD发射峰红移,荧光强度不断下降,且这两种变化同步发生;酶则出现快失活慢变构现象.而利用尿素变性SO...     

Physical properties of some McVittie metrics

A class of McVittie's new nonquadratic solutions is investigated in some detail with regard to its physical properties. It is found that decreasing pressure and density are not compatible with center regularity for these perfect fluid spheres. It is further seen that for gaseous spheres (i.e., the density drops to zero at the outer boundary of the sphere together with the pressurep) oscillatory motions arenot possible. For these gaseous models the pressure and the density are both positive inside the outer surface, and their respective gradients are negative. For the outer gaseous shells models are constructed where for a certain time interval the pressure is increasing for contracting models. Without any restriction with respect to time, for these shell models it found that the density is increasing for contracting models, and the adiabatic speed of sound is less than the speed of light. It is also found that the trace of the energy-momentum tensor is positive, the total mass is negative, and for collapsing shells the rate of change of circumference as measured by an observer riding on the shell is an increasing function of time. However, all these models have the strange geometric feature that the physical radius is a decreasing function of comoving radial coordinate.     

Novel Bandpass Filter Configuration Using Coupled Linear Tapered Line Resonators

A novel tapped bandpass filter composed of twocoupled linear taperedline resonators (LTLRs) is proposed. Multistepped resonators are applied to analyzing LTLRs, which are difficult to analyze directly. Through this analysis method, fundamental characteristics of LTLRs and their filter design parameters can be easily derived. This new filter has insertion loss less than 0.6dB at 1.9 GHz, the return loss less than 18dB in the range 1.81.93GHz and 12.3% 3dB bandwidth. Experimental results of fabricated filter are in good agreement with the design results.     

12C6+ 离子束辐照对大鼠离体主动脉环内皮依赖性舒张功能的影响

利用兰州重离子研究装置(HIRFL) 提供的高能12C6+离子束(能量为300 MeV/u,剂量率为0.5 Gy/min) 辐照大鼠离体胸主动脉环,考察了12C6+离子束辐照对主动脉环内皮依赖性舒张功能的影响,并采用NBT 还原法测定血管环生成超氧阴离子(O2􀀀) 水平,加入外源性超氧化物歧化酶(SOD) 干预探讨了O2􀀀在内皮功能损伤中的作用。研究结果表明,2.0,4.0 和6.0 Gy 的12C6+离子束辐照大鼠胸主动脉环后,可致血管内皮依赖性舒张功能的剂量依赖性明显受损(P <0.01 vs control group),并可致血管环NBT 还原能力剂量依赖性增加(4.0 Gy 时,P <0.05;6.0 Gy 时,P <0.01 vs control group)。辐照前加入外源性SOD 对6.0 Gy 12C6+离子束辐照所致血管环NBT 还原能力升高有明显抑制作用(P <0.01),对血管环内皮依赖性舒张功能也有明显的保护作用(P<0.01),但辐照后10 min 加入外源性SOD,其保护作用明显不及前者。结论显示,12C6+ 离子束辐照大鼠胸主动脉环可致血管内皮功能受损,O2 清除剂SOD 对内皮功能受损有保护作用,说明O2􀀀介导了辐照所致内皮功能损伤。Heavy ion beam has many characteristics,and it is expected to be the most suitable radiation therapy technique for malignant tumor. It is lack of depth-understanding on the potential adverse reactions caused by using this technique, because heavy ion radiotherapy is applied to clinical for a short time. Studies have shown that the vascular injury plays a pivotal role in normal tissue damage induced in the conventional radiation therapy, but there was no research report on heavy ion beam irradiation-induced vascular injury. In the present study, the isolated aortic rings of rats were irradiated by 12C6+ ion beam (300 MeV/u, 0.5 Gy/min) delivered by HIRFL(Heavy Ion Research Facility in Lanzhou), the effects of 12C6+ ion beam irradiation on aortic rings with endothelium dependent diastolic function have been investigated.NBT reduction method was used for assaying the vascular ring formation of superoxide anion (O2􀀀) level, and the involvement of superoxide anion in endothelial function injury in rats was investigated through the intervention test of exogenous superoxide dismutase (SOD) on O2. The results showed that, the vascular endothelial dependent vasodilation was impaired significantly (P < 0:01 vs control group) by irradiation with 2.0, 4.0 and 6.0 Gy 12C6+ ion beam in a dosedependent manner, and the NBT reduction of vascular rings increased dose-dependently (P <0.05 at 4.0 Gy, P <0.01 at 6.0 Gy vs control group). Adding exogenous SOD before irradiation could significantly inhibit the increasing of NBT reduction (P<0.01), and also had protective effect on vascular endothelium dependent diastolic function (P<0.01), but 10 min after irradiation with exogenous SOD, its protective function was significantly less than before. Conclusion indicated that 12C6+ ion beam irradiation could cause endothelial function impaired, O2􀀀 scavenger SOD has a protective effect on endothelial dysfunction, suggesting that O2􀀀 mediates endothelial injury induced by heavy ion irradiation.     

全同轴型Marx发生器的研制与场路协同仿真

针对Marx发生器小型化的应用需求和快前沿脉冲下Marx发生器内部存在波过程的实际情况,开展了全同轴结构Marx发生器的研制和场路协同仿真。Marx发生器采用基于环形电容器、环形开关、锥形隔离电感、轴心单边充电的全同轴结构方案,避免结构偏心带来的局部场增强效应。在CST软件中建立了Marx发生器实际结构模型,利用时变材料和场路协同仿真功能实现了充放电过程的动态仿真,仿真结果显示出快前沿脉冲下Marx发生器内部存在波过程。据此可以对绝缘设计进行优化,并分析结构参数对输出脉冲的影响。研制的5级Marx发生器体积小于0.015 m3,可在10 μs内充电至88 kV,对40 Ω传输线输出峰值电压210 kV的高压脉冲,峰值功率约1.1 GW,脉冲前沿5.3 ns,半高宽11.2 ns。     

超氧化物歧化酶在L-半胱氨酸修饰金电极上电化学行为的现场拉曼光谱研究

在以电化学方法确认L半胱氨酸对铜锌超氧化物歧化酶(copper,zincsuperoxidedismutase,SOD)在金丝电极上的电子迁移过程起促进作用的基础上,本文论述了将拉曼光谱电化学方法应用于猪红细胞SOD在经L半胱氨酸修饰的金丝电极上的电化学行为的现场拉曼光谱研究。研究结果从分子水平上提供了有关L半胱氨酸修饰在金电极上的电化学过程中,以及SOD在L半胱氨酸修饰的金电极上发生电子迁移过程中,存在于SOD、L半胱氨酸与金电极之间的相互成键作用情况随电化学过程进行而发生变化的微观结构信息,并进行了必要的分析和探讨。     

样条函数在光学器件设计和优化中的建模与应用

讨论了样条函数在光学器件设计和优化过程中的建模方法与应用。提出了用样条函数进行太阳能会聚器的优化设计。根据太阳能会聚器曲面的设计要求,首先讨论了抛物面与高次非球曲面的光学性能,然后给出了样条函数的数学模型和优化设计过程。基于光学设计软件CODE V的计算机仿真结果表明,它与通常的抛物面会聚器相比,样条函数方法具有太阳能转换效率高、系统可实现间断跟踪太阳和成本低等优点。     

Particle coupling to the octupole state in 89Sr from 88Sr(p,p')88Sr analog resonances and 88Sr(d,p)89Sr

A study has been made of the six most pronounced isobaric analog resonances in the ⁸⁸Sr(p, p')⁸⁸Sr (3^?) excitation function at E_p = 7.65, 7.80, 7.92, 8.78, 9.75, and 9.90 MeV. They are believed to have a simple structure in the parent nucleus ⁸⁹Sr consisting of the lowlying positive-parity, single-neutron spectrum of ⁸⁹Sr weakly coupled to the collective 3^? state in ⁸⁸Sr. A high-resolution ⁸⁸Sr(d, p)⁸⁹Sr experiment was performed to locate small 2f and 3p admixed fragments in ⁸⁹Sr which would allow these analog resonances their entrance widths. In addition, on-resonance ⁸⁸Sr(p, p')⁸⁸Sr (3^?) angular distributions were measured in order to determine the partial waves involved in the exit channel. Results are compared to a particlephonon coupling model, and overall selectivity, strengths, and angular distributions of the (p, p') analog resonances are consistent with the above interpretation.