用于加速器控制的神经元网络的研究与设计

随着HIRFL-CSR工程的进展，前端控制系统的改造在实时性、可靠性和成本等方面提出了更高的要求。而且HIRFL-CSR系统工作坏境非常复杂，各种干扰难以预测，使用传统方法很难达到稳定的控制效果。针对这些问题，本论文利用LonWorks现场总线技术与智能控制相结合的方法，研究和设计了用于HIRFL-CSR端控制的神经元网络系统。本文首先阐述了智能控制的产生与发展，分析了智能控制的结构理论和智能控制的主要技术，深入研究了神经网络算法及一些典型的用于控制的神经元网络模型。并从HIRFL-CSR控制角度出发，设计了用于加速器控制的神经网络控制模型，该神经网络利用一种全局寻优的自适应快速即算法来弥补基本B尸算法的缺陷，使其更加符合HIRFL-CSR控制系统的要求。其次，结合HIRFI-CSR工程的控制要求，采用Lonworks现场总线技术，把传统的集中与分散相结合的集散控制结构，变成新型的全分布式结构，把控制功能、彻底下放到现场，依靠现场智能设备本身实现基本控制功能，形成一个低成本，高可靠性的前端现场智能控制系统。采用神经元芯片实现了智能控制器和网络适配器，结合神经网络控制技术设计和实现了HIRFL-CSR控制网络的试验平台。该神经元网络的整体构架符合现代控制技术的网络化，智能化，分散化和开放化的发展趋势。最后，总结了神经元网络的研究与设计，并提出神多兄网络柞加谏器智能神不课题对HIRFL-CSR控制的完瞥迸行了有益的探索，提出了可行的实现方案，该研究对于HIRFL-CSR控制系给的改造具有重要的工程意义。

HIRFL剥离器后切束线物理设计

HIRFL is a tandem cyclotron complex for heavy ion. On the beam line between SFC and SSC, there is a stripper. Behind it, the distribution of charge states of beam is a Gauss distribution. The equilibrium charge state Q_0 is selected by 1BO2(a 50° dipole behind the stripper) and delivered to SSC. One of two new small beam line (named SLAS) after 1B02 will be builded in or der to split and deliver the unused ions of charge states (Q_0 ± n) to aspecific experimental area. Q_0 ± n ions are septumed and separated from initial(Q_0) ion beam by two septum magnets SM1, SM2. The charge state selected by SM1 will be Q_0 ± 1(6 ≤ Q_0 < 17), Q_0 ± 2(17 ≤ Q_0 < 33) and Q_0 ± 3 (Q_0 ≥ 33) forming a beam in one of the two possine new beam line with the stripping energy of (0.2 to 9.83 Mev/A), an emittance of 10π mm.mrad in the two transverse planes and an intensity ranging from 10~(11) pps for z ≤ 10 to some 10~5 pps for the heaviest element. Behind SM2, a few transport elements (three dipoles and seven qudrupoles) tra nsport Q_0 ± n beam to target positions T1, T2 (see fig. 1) and generate small beam spots (φ ≤ 4mm, φ ≤ 6mm). The optics design of the beam line has been done based on SLAC-75 (a first and second - order matrix theory). beam optics calculation has been worked out with the TRANSPORT program. The design is a very economical thinking, because without building a new accelerator we can obtain a lower energy heavy ion beam to provide for a lot of atomic and solid state physical experiments

加速器中高频电磁场计算及其应用

本文在了解和掌握传统的高频腔体设计方法--传输线理论的基础上，作为该理论的应用，计算了HIRFL注入器SFC高频腔体的主要参数；与实际测量值进行了比较，分析了误差的主要来源。主要的工作是用传输线理论和二维场计算相结合的方法设计了兰州重离子加速器冷却储存环(HIRFL-CSR)的高频腔体，给出了高频系统的主要参数以及所设计腔体加速电场的分布

HIRFL主加速器SSC和注入器SFC等时场的建立

本论文计算HIRFL主加速器SSC和注入器SFC的理论等时场，并在实测线圈场数据基础上，用最优化方法计算出主线圈和垫补线圈电流，建立起垫补场。还进一步研究了垫补场下粒子的轨道特性。垫补场和理论等时场间的相对误差<=1#per thousand)

加速器运行状态报警系统设计

加速器运行状态自动报警系统作为兰州重离子研究装置（HIRFL）自控系统的一部分，自动检测加速器运行时各设备状态，发现异常发出声光报警。系统软件主要采用c语言，声光报警装置通过CAMAC输出寄存器受计算机控制。

Cure processing modeling and cure cycle simulation of epoxy-terminated poly(phenylene ether ketone) .2. Chemorheological modeling

Chemorheology and corresponding models for an epoxy-terminated poly(phenylene ether ketone) (E-PEK) and 4,4'-diaminodiphenyl sulfone (DDS) system were investigated using a differential scanning calorimeter (DSC) and a cone-and-plate rheometer. For this system, the reported four-parameter chemorheological model and modified WLF chemorheological model can only be used in an isothermal or nonisothermal process, respectively. In order to predict the resin viscosity variation during a stepwise temperature cure cycle actually used, a new model based on the combination of the four-parameter model and the modified WLF model was developed. The combined model can predict the resin viscosity variation during a stepwise temperature cure cycle more accurately than the above two models. In order to simplify the establishment of this model, a new five-parameter chemorheological model was then developed. The parameters in this five-parameter model can be determined through very few rheology and DSC experiments. This model is practicable to describe the resin viscosity variation for isothermal, nonisothermal, or stepwise temperature cure cycles accurately. The five-parameter chemorheological model has also successfully been used in the E-PEK systems with two other curing agents, i.e., the diamine curing agent with the addition of a boron trifluride monoethylamine (BF3-MEA) accelerator and an anhydride curing agent (hexahydrophthalic acid anhydride). (C) 1997 John Wiley & Sons, Inc.

The sedimentation rates in the Okinawa trough during the Late Quaternary

On the basis of accelerator mass spectrometer radiocarbon (AMS C-14) dating, sedimentation rates of 11 cores collected from the northern to southern Okinawa Trough are discussed. The sedimentation rates in the Okinawa Trough roughly range from 11 to 39 cm/ka, and the average is 23.0 cm/ka. China's continental matter is the main sediment source of the middle Okinawa Trough and has important contribution to the northern and southern Okinawa Trough. The sedimentation rates during the marine oxygen isotope (MI5) 2 are uniformly higher than those during MIS 1 in the northern and middle Okinawa Trough while they are on the contrary in the southern Okinawa Trough. Sedimentation rates in the Okinawa Trough can be one of the proxies of sediment source and an indicator of cooling events.

Millennial-scale paleoceanography in Okinawa Trough during Late Quaternary period

Based on the analyses of foraminifer and accelerator mass spectrometer radiocarbon dating in DGKS9603 core from mid-Okinawa Trough close to bottom, oscillation curve, which expressed the relation between the surface water temperature and the depth, has been obtained by using foraminifer analysis and calculation of FP-12E transfer function. The whole core indicated seven cold phases and eight warm phases. Obvious expression of low temperature event during Middle and Late Holocene, YD,H1,H2,H3 and H4 events, as well as the short cold phase during the middle last glacial period, implied that short shifts since 50 kaBP would have been global significance. Sedimentation rate during cold phases is usually faster than that in warm stages, with the lowest rate in Holocene, which may be connected with rising sea level and principal axial of Kuroshio Current moving to west. Volcanic activities highly developed in Okinawa Trough during the Quaternary period, thus abundant volcanic glass and pumice were well preserved.

Manganese abnormity in holocene Sediments of the Bohai Sea

Manganese abnormity has been observed in the Holocene sediments of the mud area of Bohai Sea. On the basis of grain size, chemical composition, heavy mineral content and accelerator mass spectrometry (AMS) C-14 dating of foraminifer, relationships between manganese abnormity and sedimentation rates, material source, hydrodynamic conditions are probed. Manganese abnormity occurred during the Middle Holocene when sea level and sedimentation rates were higher than those at present. Sedimentary hiatus was not observed when material sources and hydrodynamic conditions were quite similar. Compared with the former period, the latter period showed a decrease in reduction environment and an inclination toward oxidation environment with high manganese content, whereas provenance and hydrodynamic conditions showed only a slight change. From the above observations, it can be concluded that correlation among manganese abnormity, material source, and hydrodynamic conditions is not obvious. Redox environment seems to be the key factor for manganese enrichment, which is mainly related to marine authigenic process.