ZXB10在山东荣成广电城域网中的应用

结合荣成广电利用ＺＸＢ１０所组建的城域网这一实例,简要介绍了ＺＸＢ１０的技术特点以及它在几种常用业务应用方面的组网方式。     

国产高性能通用数字信号处理器的DEMO板设计

为了向用户演示高性能芯片BWDSP100,设计了一款DEMO板。通过该板可以向用户演示芯片的功能、性能等。板卡采用经典FPGA+DSP结构,处理功能强大,控制灵活。在设计过程中,贯彻以用户为中心的设计思想,不仅做到让用户使用方便,还要全面演示芯片。     

DF100A型发射机宽频带放大器工作原理及故障分析

主要针对DF100A型发射机200 W宽频带放大器的工作原理,故障现象分析和处理方法。对于宽频带放大器的未来发展方向提供一种新的思路,从根本上解决宽频带放大器的故障率较高的问题。     

真空冷冻干燥的检测与控制探讨

分析、探讨了真空冷冻干燥设备的检测与控制原理、设置、常见问题及其解决办法，阐述了Pt100铂热电阻、温度巡检仪和真空阻值显示调节仪的矫正与校验，对此类设备的使用、维护有一定的指导和参考意义。     

从全球百大纸业公司看我国纸业公司发展

通过对国外大型纸业公司的生产、营销、管理等方面的分析,探讨了我国纸业公司与国外大企业的差距及今后的发展对策。     

RETRACTED: Reproducibility study of (TLD-100) dosimeters using an automated and manual TLD reader for radiotherapy applications

The precision of the response of Harshow thermoluminescent dosimeters (TLD-100) is investigated for two Harshow TLD readers. The mean reproducibility for chips pre-readout annealed at 100 °C for 15 min, evaluated with the manual planchet reader 4500, is 0.61% (1 standard deviation) using pre-readout method. When chips are evaluated with the automated hot-gas reader 4500, reproducibility values are undoubtedly worse, mean reproducibility for numerically stabilized dosimeters being equal to 2.12%(1 standard deviation) using pre-readout method also. The pre-readout method was used for elimination of lower temperature peaks in order to obtain more stability. These results indicate that the automated hot-gas 4500 reader, or, at least, the instrument used for the present measurements, is not adequate for chips evaluation, if precise and accurate dosimetry is required. The difference in precision for manual planchet reader is apparently due to geometry inconsistencies in the orientation of the planchet to imperfect chips faces during readout, requiring careful and manual reproducible arrangement of the selected chips faces in contact with the manual reader planchet. In order to elucidate this point, the planchet support face of all chips dosimeters was identified with a small point made by pencil, reducing in this way geometrical variations.     

Looking to the future – a UK industry perspective

Abstract

The theme of the 10th PATRAM Conference has been ‘looking to the future’. This contribution aims to give a UK perspective on future issues and challenges. In doing so, I will give a short summary of UK transport experience before going on to discuss the future and in particular the challenges and opportunities facing the UK radioactive transport industry.     

Synthesis of a Large Diamond Crystal with a Smooth （100） Facet at its Top Through MPCVD

A large diamond crystal up to 500μm in diameter with a smooth(100)facet at its top has been synthesized on Mo substrate through microwave plasma chemical vapor deposition(MPCVD).Its morphology and quality were characterized by scanning electron microscopy(SEM),and the growth mechanism was roughly illustrated from both macroscopic and microscopic viewpoints.It was found that morphological instabilities are a major factor resulting in synthesis of large diamond crystals,moreover,high microwave power density(MPD),high CH4 concentrations,high pressure,high substrate surface temperature and the addition of a small amount of O2 were also necessary for the synthesis of large diamond crystals.     

Analysis of Interaction of Disruption Induced Runaway Electrons with Plasma Facing Components in Next Generation Tokamaks

Runaway electrons which are accelerated during plasma disruptions may cause damage to the plasma facing components when their energy is deposited locally. In order to assess the possible damage of plasma facing components and the associated damage thresholds in a next generation tokamak, analyses have been carried out. The energy deposition by 100 and 300 MeV electrons in component materials has been calculated using a Monte Carlo code. The effect of parametric changes of carbon armor thickness, electron energy and angle of incidence has been evaluated. Subsequently the thermal response of divertor structures with carbon armor and with bare tungsten, and of a first wall structure has been analyzed and thresholds for thermally induced component damage were derived. The damage threshold under 100 MeV electron impact on a divertor structure with 10 mm carbon coverage and dispersion strengthened copper cooling tubes is about 60 MJ/m² of incident energy, that for a divertor structure with molybdenum coolant tubes is about 115 MJ/m², whereas the damage threshold for melting of the bare tungsten divertor is only about 30 MJ/m². Damage of the first wall structure would occur above 180 MJ/m². For 300 MeV electron incidence the damage thresholds are 13 to 47% lower than the values for 100 MeV.     

Scattering of 14.1 MeV Neutrons by 6Li, 7Li, 9Be, 10B and 11B

Using a time-of-flight spectrometer, the differential cross sections were measured for the elastic and inelastic scattering of 14.1 MeV neutrons by ⁶Li, ⁷Li, ⁹Be, ¹⁰B and ¹¹B. In the case of elastic scattering by ⁷Li and ¹⁰B, correction was applied to subtract the contribution of inelastic scattering from the unresolved first excited state, after which, the elastic scattering data were compared with predictions based on the optical model. The potential parameters derived with a seven-parameter search yielded angular distributions agreeing with the present experimental data. The expressions for these parameters are presented as a function of mass number.

The experimental data on inelastic scattering were analyzed with the distorted wave Born approximation. The deformation parameters were estimated to be nearly equal to or larger than unity for these nuclei.