碳化硅陶瓷材料的制备工艺和应用研究进展

碳化硅陶瓷材料由于具有轻质高强、导热性能好、膨胀系数低、硬度高、抗氧化等优异的性能,被广泛用作高温结构部件。本文围绕碳化硅材料在光学反射镜材料的应用,对碳化硅材料的制备工艺和应用方面的进展作简要综述。     

设计之本在于贴近生活

创意产业是在世界经济步入知识经济阶段发展出来的新兴产业,它强调文化对经济的支持和推进。目前,全球创意产业正以每年10％的速度增长,大大高于GDP的增长。2010年,上海成功举办了世博会,并加入了联合国教科文组织“创意城市”网络。     

The Spectroscopic Systems for the Study of Light Impurity Particle Transport in the HT-7 Tokamak

Three spectroscopic systems have been developed for the study of light impurity particle transport in the HT-7 tokamak. A visible multi-channel spectroscopic system （VIS） is used to obtain the brightness distribution of the line emission from ionized light impurities. The profile of Zeff（r） has been obtained from the visible multi-channel bremsstrahlung measurement （VB）. The system with a rotating hexahedral mirror for space-time resolved spectroscopy measurement from ultraviolet to visible （UV） can provide the brightness distribution of two different emission lines of the light impurities simultaneously. The emissivities by these multi-channel measurements can be obtained by Abel inversion. The measurement was performed in typical OH discharges in the HT-7 tokamak. The carbon particle transport was analyzed. The feasibility of these diagnostic systems for the impurity particle transport study is clearly demonstrated.     

The Experiment of Modulated Toroidal Current on HT-7 and HT-6M Tokamak

The Experiments of Modulated Toroidal Current were done on the HT-6M tokamak and HT-7 superconducting tokamak. The toroidal current was modulated by programming the Ohmic heating field. Modulation of the plasma current has been used successfully to suppress MHD activity in discharges near the density limit where large MHD m = 2 tearing modes were suppressed by sufficiently large plasma current oscillations. The improved Ohmic confinement phase was observed during modulating toroidal current (MTC) on the Hefei Tokamak-6M (HT-6M) and Hefei superconducting Tokamak-7 (HT-7). A toroidal frequency-modulated current, induced by a modulated loop voltage, was added on the plasma equilibrium current. The ratio of A.C. amplitude of plasma current to the main plasma current △Ip/Ip is about 12% ～ 30%. The different formats of the frequency-modulated toroidal current were compared.     

焊接车间点焊机计算电力负荷与功率因数提高方法

介绍焊接车间点焊机计算电力负荷与功率因数提高方法.     

H_α/ D_α Measurements Based on Photo Diode Array in the HT-7 Tokamak

1. IntroductionThe measurement of H./D. emission, which canafford much information of the plasma, is one of the-,primary diagnostics in tokamak experiments. If theintensity Of H./D. emission along different chords ina poloidal plane are measured, with the ABEL inver-sion, one can get the H./D. emissivity, thus the spatial distribution of neutral H/D and its penetrationor ionization length. With the absolute brightness ofH./D. emission and assuming some symmetries inspatial distribution, …     

Radiative Divertor Plasma Behavior in L- and H-Mode Discharges with Argon Injection in EAST

Introducing strong radiative impurities into divertor plasmas has been considered as an important way to mitigate the peak heat load at the divertor target plate for ITER, and will be employed in EAST for high power long pulse operations. To this end, radiative divertor experiments were explored under both low (L) and high (H)-mode confinement regimes, for the first time in EAST, with the injection of argon and its mixture (25% Ar in D 2 ). The Ar injection greatly reduced particle and heat fluxes to the divertor in L-mode discharges, achieving nearly complete detached divertor plasma regimes for both single null (SN) and double null (DN) configurations, without increasing the core impurity content. In particular, the peak heat flux was reduced by a factor of ～6, significantly reducing the intrinsic in-out divertor asymmetry for DN, as seen by both the new infra-red camera and the Langmuir probes at the divertor target. Promising results have also been obtained in the H-modes with argon seeding, demonstrating a significant increase in the frequency and decrease in the amplitude of the edge localized modes (ELMs), thus reducing both particle and heat loads caused by the ELMs. This will be further explored in the next experimental campaign with increasing heating power for long pulse operations.     

EAST运动斯塔克效应诊断的信号处理分析系统设计

运动斯塔克效应诊断利用光弹调制偏振测量技术可将偏振角的空间方向的测量转化为对二倍频信号强度比值的求取。为精准、快速地获取二倍频信号幅值,设计了基于FPGA的运动斯塔克效应诊断数字频谱分析系统,系统采用高速ADC采集运动斯塔克效应信号后送入FPGA,以EP2AGX125型FPGA为核心进行快速傅里叶变换获得信号频谱,求取二倍频分量的幅值进而计算出偏振角。经仿真与实验测试,该系统的测量精度好于5%,工作周期小于10 ms,满足MSE诊断信号处理要求。     

冲压车间快速压机电力配电的设计、安装、调试

采用需要系数法计算冲压车间快速进口压机的负荷,准确设计变压器容量。选择无谐波电源,使动态补偿柜正常运行。安装断路器附件失压线圈,遵守倒闸操作规范。屋顶并网光伏发电波形分析     

焊接车间点焊机功率因数提高

从焊接车间点焊机设备负荷的特点出发，通过实际测试、改造等几个方面，提高点焊机的功率因数。并从测试对比中，证实中频点焊机比工频点焊机节能。