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双换法电针治疗面瘫60例临床观察 被引量:1
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作者 王竟吉 李娜 +1 位作者 李民兰 杜天银 《甘肃中医》 2005年第7期48-48,共1页
关键词 面瘫/针刺疗法 电针 双换法
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真空材料放气率高精度测量装置 被引量:1
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作者 李津铭 王进伟 +1 位作者 刘俊男 陈明 《真空》 CAS 2023年第4期60-64,共5页
介绍了上海光源二期线站工程机械真空辅助实验室研制的一套基于双通道气路转换法的真空材料放气率高精度测量装置,对同步辐射真空系统中常见的无氧铜材料样品开展放气率测试研究。实验测量并计算得出样品与本底和本底在不同温度状态、... 介绍了上海光源二期线站工程机械真空辅助实验室研制的一套基于双通道气路转换法的真空材料放气率高精度测量装置,对同步辐射真空系统中常见的无氧铜材料样品开展放气率测试研究。实验测量并计算得出样品与本底和本底在不同温度状态、排气时间、气路转换后的放气量。结果显示,经72h,150℃高温烘烤后的无氧铜放气率为3.06×10^(-12)Pa·m^(3)·s^(-1)·cm^(-2),表明装置具有较高的放气率测试精度,可以满足同步辐射装置对超高真空材料放气率的测量要求。 展开更多
关键词 真空材料 放气率 通道气路转换法
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材料在真空环境下放气的测试技术研究 被引量:24
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作者 董猛 冯焱 +3 位作者 成永军 盛学民 赵澜 王永军 《真空与低温》 2014年第1期46-51,共6页
在真空材料放气率测试装置上对金属材料的放气特性进行了实验研究,实验采用的方法为静态升压法、固定流导法、双通道气路转换法。实验结果表明,测试装置的极限真空度为9.2×10-9Pa,铜、铝合金2A12、304不锈钢三种材料半小时后的放... 在真空材料放气率测试装置上对金属材料的放气特性进行了实验研究,实验采用的方法为静态升压法、固定流导法、双通道气路转换法。实验结果表明,测试装置的极限真空度为9.2×10-9Pa,铜、铝合金2A12、304不锈钢三种材料半小时后的放气率分别为2.34×10-8Pa·m3·s-1·cm-2、1.83×10-9Pa·m3·s-1·cm-2、8.48×10-11Pa·m3·s-1·cm-2。利用四极质谱计测得装置的本底气体成分主要有H2、N2/CO、H2O和CO2,材料放出的气体成分主要有N2/CO、H2O。三种方法测试得到的铜金属材料的放气率随着温度的升高而不断增大。 展开更多
关键词 材料放气率 通道气路转换法 固定流导法 静态升压法
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铬锆铜材料的热出气性能研究 被引量:2
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作者 陈明 薛松 +2 位作者 周泽宇 刘俊男 李波 《真空科学与技术学报》 CAS CSCD 北大核心 2021年第8期766-769,共4页
采用双通道气路转换法测量了铬锆铜材料的出气率。对经过150℃、保温24 h烘烤的铬锆铜,测得的出气率为2.89×10^(-10)Pa·L·s^(-1)·cm^(-2)(等效氮气),烘烤温度提升至250℃时,铬锆铜的出气率降低约一个数量级。铬锆... 采用双通道气路转换法测量了铬锆铜材料的出气率。对经过150℃、保温24 h烘烤的铬锆铜,测得的出气率为2.89×10^(-10)Pa·L·s^(-1)·cm^(-2)(等效氮气),烘烤温度提升至250℃时,铬锆铜的出气率降低约一个数量级。铬锆铜在真空炉中进行400℃、保温24 h除气处理后,仅经过150℃、保温24 h烘烤,出气率即低至1.64×10^(-11)Pa·L·s^(-1)·cm^(-2),进一步提升烘烤温度,出气率变化不大。通过X射线光电子谱分析铬锆铜在不同温度下的表面成分。在250℃时,铬锆铜表面Cu的氧化物已经基本完全分解,在400℃时,铬锆铜体内的Cr析出至表面,降至室温,Cr仍保留在表面。铬锆铜表面氧化层成分的变化是造成其出气率差异的原因。 展开更多
关键词 铬锆铜 出气率 通道气路转换法 真空炉 X射线光电子谱
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Application of Image Fusion Methods to Cell Imaging Processing
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作者 李勤 代彩虹 +4 位作者 俞信 王苏生 张同存 曹恩华 李景福 《Journal of Beijing Institute of Technology》 EI CAS 1998年第4期412-417,共6页
Aim To fuse the fluorescence image and transmission image of a cell into a single image containing more information than any of the individual image. Methods Image fusion technology was applied to biological cell imag... Aim To fuse the fluorescence image and transmission image of a cell into a single image containing more information than any of the individual image. Methods Image fusion technology was applied to biological cell imaging processing. It could match the images and improve the confidence and spatial resolution of the images. Using two algorithms, double thresholds algorithm and denoising algorithm based on wavelet transform,the fluorescence image and transmission image of a Cell were merged into a composite image. Results and Conclusion The position of fluorescence and the structure of cell can be displyed in the composite image. The signal-to-noise ratio of the exultant image is improved to a large extent. The algorithms are not only useful to investigate the fluorescence and transmission images, but also suitable to observing two or more fluoascent label proes in a single cell. 展开更多
关键词 image fusion wavelet transform double thresholds algorithm denoising algorithms living cell image
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四象限红外探测器光电参数测试技术研究 被引量:6
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作者 徐小垚 陈海清 齐哲明 《光学仪器》 2007年第1期7-11,共5页
针对四象限红外探测器的特点,设计了基于双光路替换法的光学系统。该系统可测试探测器的脉冲响应灵敏度、光电响应均匀度以及相邻象元之间的串扰并可以有效地避免光源输出功率波动和光学分光器件分光比的测量不确定度等因素带来的误差,... 针对四象限红外探测器的特点,设计了基于双光路替换法的光学系统。该系统可测试探测器的脉冲响应灵敏度、光电响应均匀度以及相邻象元之间的串扰并可以有效地避免光源输出功率波动和光学分光器件分光比的测量不确定度等因素带来的误差,在相同的硬件条件下可实现更高的测量精度。实验结果证明:该测量系统具有较低的测量误差(≤5%),并且结构简单紧凑,可适用于对光源要求较高的检测系统进行实时检测。 展开更多
关键词 四象限红外探测器 光路替换法 响应灵敏度 响应均匀度 串扰
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Supersymmetric Sawada-Kotera-Ramani Equation: Bilinear Approach 被引量:2
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作者 YU Ya-Xuan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第3期685-688,共4页
In this paper, using the Hirota's bilineax method, we consider the N = 1 supersymmetric Sawada-Kotera- Ramani equation and obtain the Bazcklund transformation of it. Its one- and two-supersoliton solutions axe obtain... In this paper, using the Hirota's bilineax method, we consider the N = 1 supersymmetric Sawada-Kotera- Ramani equation and obtain the Bazcklund transformation of it. Its one- and two-supersoliton solutions axe obtained and N-supersoliton solutions for N ≥ 3 are given under the condition kiξj = kjξi. 展开更多
关键词 N = 1 supersymmetric Sawada-Kotera-Ramani equation Backlund transformation supersoliton solutions
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New Exact Solutions for a Class of Nonlinear Coupled Differential Equations
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作者 ZHAOHong GUOJun +1 位作者 BAICheng-Lin HANJi-Guang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第5期781-786,共6页
More new exact solutions for a class of nonlinear coupled differential equations are obtained by using a direct and efficient hyperbola function transform method based on the idea of the extended homogeneous balance m... More new exact solutions for a class of nonlinear coupled differential equations are obtained by using a direct and efficient hyperbola function transform method based on the idea of the extended homogeneous balance method. 展开更多
关键词 nonlinear couple differential equations new exact solutions hyperbola function transform method
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A novel two-stage Lagrangian decomposition approach for refinery production scheduling with operational transitions in mode switching 被引量:2
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作者 施磊 江永亨 +1 位作者 王凌 黄德先 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第11期1793-1800,共8页
To address large scale industrial processes,a novel Lagrangian scheme is proposed to decompose a refinery scheduling problem with operational transitions in mode switching into a production subproblem and a blending a... To address large scale industrial processes,a novel Lagrangian scheme is proposed to decompose a refinery scheduling problem with operational transitions in mode switching into a production subproblem and a blending and delivery subproblem.To accelerate the convergence of Lagrange multipliers,some auxiliary constraints are added in the blending and delivery subproblem.A speed-up scheme is presented to increase the efficiency for solving the production subproblem.An initialization scheme of Lagrange multipliers and a heuristic algorithm to find feasible solutions are designed.Computational results on three cases with different lengths of time horizons and different numbers of orders show that the proposed Lagrangian scheme is effective and efficient. 展开更多
关键词 Refinery scheduling Operational transitions Lagrangian decomposition
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Contention avoidance using dual-fuzzy assembly threshold algorithm in optical burst switching networks
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作者 杨九如 王钢 贾世楼 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2009年第4期465-468,共4页
To avoid burst contention efficiently,on the basis of feedback-based source flow-rate control(SFC) strategy,a novel fuzzy-control-based assembly algorithm,called dual-fuzzy assembly threshold(DFAT),is proposed in an o... To avoid burst contention efficiently,on the basis of feedback-based source flow-rate control(SFC) strategy,a novel fuzzy-control-based assembly algorithm,called dual-fuzzy assembly threshold(DFAT),is proposed in an optical burst switching network.In our algorithm,according to the variations of burst assembly period and the interarrival of burst control packet,the traffic states of edge-switching nodes and core-switching nodes are first obtained.Then,the assembly threshold of bursts is set dynamically in order to operate the source traffic management from the information of traffic states.The performance of DFAT algorithm on burst loss probability is evaluated,and simulation results show that,compared with conventional assembly algorithms,the proposed scheme can constrain the birth of burst contention efficiently,when being a heavy load state of network. 展开更多
关键词 optical burst switching contention avoidance burst assembly dual feedback mechanism
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Calculation of optimal current density of double side permanent magnet linear synchronous motor
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作者 JANG Ki-Bong AN Ho-Jin KIM Gyu-Tak 《Journal of Central South University》 SCIE EI CAS 2011年第1期165-170,共6页
The use of design method considering a coil temperature to maximize the thrust density of a double side coreless permanent magnet linear synchronous motor(PMLSM) was presented.The optimal current density where the coi... The use of design method considering a coil temperature to maximize the thrust density of a double side coreless permanent magnet linear synchronous motor(PMLSM) was presented.The optimal current density where the coil temperature reaches an allowable temperature with heat analysis was applied to a magnetic circuit design.Changing optimal current density is verified whenever the design parameters of the motor are altered.The design parameters of the motor were applied to thrust calculation.In this way,the optimal model,which is a reversal of the existing design method,is deduced.The results were compared with the experimental data to verify their validity.When the convection heat transfer coefficient is applied to other models,the results of the analysis and test values show good concordance.The method proposed has some limitations. 展开更多
关键词 permanent magnet linear synchronous motor current density heat transfer temperature thickness of coil
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Adjacent Strong Edge Chromatic Number of Series-Parallel Graphs 被引量:1
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作者 王淑栋 庞善臣 许进 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2005年第2期267-278,共12页
In this paper, we will study the adjacent strong edge coloring of series-parallel graphs, and prove that series-parallel graphs of △(G) = 3 and 4 satisfy the conjecture of adjacent strong edge coloring using the doub... In this paper, we will study the adjacent strong edge coloring of series-parallel graphs, and prove that series-parallel graphs of △(G) = 3 and 4 satisfy the conjecture of adjacent strong edge coloring using the double inductions and the method of exchanging colors from the aspect of configuration property. For series-parallel graphs of △(G) ≥ 5, △(G) ≤ x'as(G) ≤ △(G) + 1. Moreover, x'as(G) = △(G) + 1 if and only if it has two adjacent vertices of maximum degree, where △(G) and X'as(G) denote the maximum degree and the adjacent strong edge chromatic number of graph G respectively. 展开更多
关键词 series-parallel graph adjacent strong edge coloring adjacent strong edge chromatic number.
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On Triply Periodic Wave Solutions for(2+1)-Dimensional Boussinesq Equation 被引量:1
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作者 王军民 《Communications in Theoretical Physics》 SCIE CAS CSCD 2012年第4期563-567,共5页
By employing Hirota bilinear method and Riemann theta functions of genus one,explicit triply periodic wave solutions for the(2+1)-dimensional Boussinesq equation are constructed under the Backlund transformation u =(1... By employing Hirota bilinear method and Riemann theta functions of genus one,explicit triply periodic wave solutions for the(2+1)-dimensional Boussinesq equation are constructed under the Backlund transformation u =(1 /6)(u0 1) + 2[ln f(x,y,t)] xx,four kinds of triply periodic wave solutions are derived,and their long wave limit are discussed.The properties of one of the solutions are shown in Fig.1. 展开更多
关键词 Hirota bilinear method theta functions periodic wave solutions (2+1)-dimensional Boussinesq equation
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