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The Mode of Data Exchange between PHRDC and HIS 被引量:4
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作者 王钟 李刚荣 +3 位作者 赵直枉 陈飞 李晴辉 徐朗 《中国数字医学》 2009年第10期11-14,共4页
参照国家有关个人健康档案的标准。分析HIS与PHRDC之间门诊、住院等不同医疗信息的数据交换时机及不同类型医院HIS与PHRDC的数据交换方式。以研究医疗机构与个人健康档案数据中心之间接口。并设计不同的交换方式和数据交换时机。针对不... 参照国家有关个人健康档案的标准。分析HIS与PHRDC之间门诊、住院等不同医疗信息的数据交换时机及不同类型医院HIS与PHRDC的数据交换方式。以研究医疗机构与个人健康档案数据中心之间接口。并设计不同的交换方式和数据交换时机。针对不同医疗信息、医疗机构规模,提出不同的数据交换时机和交换方式,实现个人健康档案数据中心与HIS数据交换根据固化医疗信息的特点择时上传。并能挑选符合自身实际的数据交换方式。 展开更多
关键词 医院信息系统 个人健康档案数据中心 交换时机 交换方式
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Source Separation of Diesel Engine Vibration Based on the Empirical Mode Decomposition and Independent Component Analysis 被引量:21
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作者 DU Xianfeng LI Zhijun +3 位作者 BI Fengrong ZHANG Junhong WANG Xia SHAO Kang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2012年第3期557-563,共7页
Vibration signals from diesel engine contain many different components mainly caused by combustion and mechanism operations,several blind source separation techniques are available for decomposing the signal into its ... Vibration signals from diesel engine contain many different components mainly caused by combustion and mechanism operations,several blind source separation techniques are available for decomposing the signal into its components in the case of multichannel measurements,such as independent component analysis(ICA).However,the source separation of vibration signal from single-channel is impossible.In order to study the source separation from single-channel signal for the purpose of source extraction,the combination method of empirical mode decomposition(EMD) and ICA is proposed in diesel engine signal processing.The performance of the described methods of EMD-wavelet and EMD-ICA in vibration signal application is compared,and the results show that EMD-ICA method outperforms the other,and overcomes the drawback of ICA in the case of single-channel measurement.The independent source signal components can be separated and identified effectively from one-channel measurement by EMD-ICA.Hence,EMD-ICA improves the extraction and identification abilities of source signals from diesel engine vibration measurements. 展开更多
关键词 empirical mode decomposition independent component analysis source separation single-channel signal
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Adsorption of Ce(Ⅳ) Anionic Nitrato Complexes onto Anion Exchangers and Its Application for Ce(Ⅳ) Separation from Rare Earths(Ⅲ) 被引量:9
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作者 Ludek Jelinek Mikio Kumagai 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第4期385-391,共7页
Ce (Ⅳ) nitrato complexes were adsorbed on two anion exchangers based on polyvinyl pyridine (PVP) and quatemized PVP incorporated into porous silica matrix. The effect of nitric acid concentration (0.5~6 mol... Ce (Ⅳ) nitrato complexes were adsorbed on two anion exchangers based on polyvinyl pyridine (PVP) and quatemized PVP incorporated into porous silica matrix. The effect of nitric acid concentration (0.5~6 mol·L^-1) and temperature (278 ~318 K) on Ce( Ⅳ ) sorption efficiency was investigated. Sorption increased with increasing nitric acid concentration, indicating that [Ce(NO3)6]^2- complex is the main adsorbed Ce(Ⅳ) species. Oxidation of sorbents by adsorbed Ce ( Ⅳ ) species resulting in Ce ( Ⅲ ) release to the solution was observed. Pyridine based anion exchangers exhibited higher oxidation stability compared to the commercial strong base anion exchanger. Ce( Ⅳ ) reduction was temperature dependent and obeyed pseudo-first-order reaction kinetics. Column separation of Ce ( Ⅳ ) from La ( Ⅲ ) and Y ( Ⅲ ) was carried out from 6 mol·L^-1 nitric acid with PVP based anion exchanger. Reasonable Ce (Ⅳ) breakthrough capacity (0.7 mol·kg^-1 PVP) was achieved. No remarkable decrease of capacity was observed within 3 consequent runs. In contrast, Ce (Ⅲ) leakage due to reduction decreased and breakthrough capacity slightly increased. This effect was more pronounced with increasing temperature. Regeneration with 0.1 mol·L^- 1 nitric acid was successful (recovery 100% ± 4% ) and Ce solution of high purity ( 〉 99.97% ) with respect to La and Y content was gained. 展开更多
关键词 ion exchange tetravalent cerium separATION rare earths
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Exchange Bias Effect in Phase Separated La0.33Pr0.34Ca0.33MnO3 Thin Films
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作者 李惠 李林 +2 位作者 成龙 梁海星 曾长淦 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第4期475-478,J0002,共5页
Exchange bias effect is observed in the phase separated La0.33Pr0.34Ca0.33MnO3 thin films. High exchange bias field of about 1 kOe is achieved at 4 K. The exchange bias effect in La0.33Pr0.34Ca0.33MnO3 thin films migh... Exchange bias effect is observed in the phase separated La0.33Pr0.34Ca0.33MnO3 thin films. High exchange bias field of about 1 kOe is achieved at 4 K. The exchange bias effect in La0.33Pr0.34Ca0.33MnO3 thin films might originate from the intrinsic phase separation of the La0.33Pr0.34Ca0.33MnO3 or surface effect. The dependence of exchange bias effect on temperature, cooling field, and thickness is also investigated. This work would open an avenue to the application in the magnetic memory devices based on the phase separated manganites. 展开更多
关键词 exchange bias Phase separation Pulse laser deposition MANGANITES Training effect
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Experimental Investigation on Heat Exchange and Separation Performance of an Annular Structured Internal Heat-integrated Distillation Column 被引量:2
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作者 许良华 陈大为 +1 位作者 闫兵海 袁希钢 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2014年第10期1087-1091,共5页
In this paper heat exchange coefficient and separation efficiency of an annular structured internal heat-integrated distillation column(HIDi C) were experimentally measured. About 50% heat of the inner column could be... In this paper heat exchange coefficient and separation efficiency of an annular structured internal heat-integrated distillation column(HIDi C) were experimentally measured. About 50% heat of the inner column could be transferred to the outer column. The overall heat exchange coefficient decreased with an increase in pressure ratio of the inner column and the outer column, but was little affected by the F-factor. The increase of the pressure ratio decreased obviously the separation efficiency of the outer column but had little effect on that of the inner column. 展开更多
关键词 Internal heat-integrated DISTILLATION COLUMN Overall HEAT exchange coefficient separation efficiency
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Separation process study of liquid phase catalytic exchange reaction based on the Pt/C/PTFE catalysts 被引量:2
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作者 Peilong Li Li Guo +7 位作者 Renjin Xiong Junhong Luo Ming Wen Yong Yao Zhi Zhang Jiangfeng Song Yan Shi Tao Tang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第8期1837-1845,共9页
The liquid phase catalytic exchange(LPCE) reaction is an effective process for heavy water detritiation and production of deuterium-depleted potable water. In the current study, hydrophobic carbon-supported platinum c... The liquid phase catalytic exchange(LPCE) reaction is an effective process for heavy water detritiation and production of deuterium-depleted potable water. In the current study, hydrophobic carbon-supported platinum catalysts(Pt/C/PTFE) with high efficiency as reported previously for LPCE were prepared and comprehensive performance evaluation method is applied to evaluate the separation behaviors of LPCE systematically. Experimental results indicate that the optimum reaction temperature of 60–80℃ and the molar feed ratio G/L of 1.5–2.5 would lead to higher separation efficiencies. As to the packing method, a random packing mode with a packing ratio of hydrophobic catalysts 0.25 is recommended. In addition, thermodynamic analysis corresponds well with experimental results under lower temperature and G/L, while the suppression of kinetic factors should not be neglected when T > 80℃ and G/L > 1.5. 展开更多
关键词 Liquid phase CATALYTIC exchange(LPCE) HYDROPHOBIC carbon-supported PLATINUM CATALYSTS separATION behaviors Optimal operating condition Water DETRITIATION
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Separation of Clay Minerals from Host Sediments Using Cation Exchange Resins 被引量:2
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作者 I.S.Ismael H.M.Baioumy 《Chinese Journal Of Geochemistry》 EI CAS 2003年第4期337-344,共8页
Classic physical and chemical treatments applied to separating clay minerals from the host sediments are often difficult or aggressive for clay minerals. A technique using cation exchange resins (amberlite IRC\|50H an... Classic physical and chemical treatments applied to separating clay minerals from the host sediments are often difficult or aggressive for clay minerals. A technique using cation exchange resins (amberlite IRC\|50H and amberlite IR\|120) is used to separate clay minerals from the host sediments. The technique is based on the exchange of cations in the minerals that may be associated clay minerals in sediments, such as Ca and Mg from dolomite; Ca from calcite, gypsum and francolite with cations carried by resin radicals. The associated minerals such as gypsum, calcite, dolomite and francolite are removed in descending order. Separation of clay minerals using cation exchange resins is less aggressive than that by other classic treatments. The efficiency of amberlite IRC\|50H in the removal of associated minerals is greater than that of amberlite IR\|120. 展开更多
关键词 CLAY MINERAL HOST sediment CATION exchange RESIN Experimental technique separate
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Study on the Separation of Co^(2+) from Zn^(2+) , Cd^(2+) by Anion-exchange Chromatography 被引量:1
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作者 WANG Xin yan,ZHOU Chun shan,WANG Yan (College of Chemistry and Chemical Engineering, Central South University of Technology, Changsha 410083, China) 《Journal of Central South University》 SCIE EI CAS 2000年第2期88-91,共4页
The separation of Co 2+ from Zn 2+ , Cd 2+ by anion exchange chromatography was discussed. The chromatographic column containing anion resin 201×7 which was saturated with a solution of ammonium chloride. The eff... The separation of Co 2+ from Zn 2+ , Cd 2+ by anion exchange chromatography was discussed. The chromatographic column containing anion resin 201×7 which was saturated with a solution of ammonium chloride. The effects of the eluant acidity and eluant composition on the separation were investigated. The results indicate that this anion exchange chromatography is suitable to the separation of Co 2+ from Zn 2+ , Cd 2+ , and the condition of separation is simple and convenient. When the column is saturated with NH 4Cl solution (2.0 mol/L, pH=4.0), the separation can be completed effectively. Zn 2+ and Cd 2+ can also be separa ted when different eluants are used and the pure solution with high concentration of Zn 2+ , Cd 2+ respectively can be obtained ea sily. 展开更多
关键词 ANION exchange CHROMATOGRAPHY ZN 2+ CD 2+ CO 2+ separATION
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Chiral ionic liquids as chiral selectors for separation of tryptophan enantiomers by ligand exchange chromatography 被引量:2
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作者 杨艳霞 李静 蒋新宇 《Journal of Central South University》 SCIE EI CAS 2013年第5期1173-1177,共5页
Chiral ionic liquids (CILs) containing imidazolium cations and L-Proline (L-Pro) anions were applied as chiral selector to separate tryptophan (Trp) enantiomers on a C18 column by ligand exchange chromatography. Sever... Chiral ionic liquids (CILs) containing imidazolium cations and L-Proline (L-Pro) anions were applied as chiral selector to separate tryptophan (Trp) enantiomers on a C18 column by ligand exchange chromatography. Several factors influencing Trp enantiomers separation, such as alkyl chain length of CILs, concentrations of Cu2+ and CILs, pH of the mobile phase, flow rate, organic solvent and temperature, were studied. Under the optimal conditions, the Trp enantiomers could be successfully separated within 21 min with the resolution of 2.30. At the same time, some thermodynamical parameters were obtained. The experimental results show that the enthalpy values of the Trp enantiomers are negative, indicating that the separation process is exothermic. And the enthalpy values of D-Trp are larger than those of L-Trp, which indicates that L-Trp could form more stable ternary complexes with tryptophan enantiomers. 展开更多
关键词 chiral ionic liquids chiral separation ligand exchange chromatography tryptophan enantiomers
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Modelling of graded index waveguide fabricated by ion exchange on Er^(3+) doped glass 被引量:1
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作者 邵公望 金国良 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第3期1096-1104,共9页
A general numerical tool, based on thermal diffusion equation and full-vectorial eigen-mode equation, has been presented for the systematic analysis of graded index channel waveguide fabricated by ion exchange on Er^3... A general numerical tool, based on thermal diffusion equation and full-vectorial eigen-mode equation, has been presented for the systematic analysis of graded index channel waveguide fabricated by ion exchange on Er^3+ doped glass. Finite difference method with full-vectorial formulation (FV-FDM) is applied to solving the full-vectorial modes of graded index channel waveguide for the first time. The coupled difference equations based on magnetic fields in FV-FDM are derived from the Taylor series expansion and accurate formulation of boundary conditions. Hybrid nature of vectorial guided modes for both pump (980 nm) and signal light (1550 nm) are demonstrated by the simulation. Results show that the fabrication parameters of ion exchange, such as channel opening width and time ratio of second step to first step in ion exchange, have large influence on the properties of waveguide. By optimizing the fabrication parameters, maintenance of monomode for signal light and improvement of the gain dynamics can be achieved in Er^3+ doped waveguide amplifier (EDWA) fabricated by ion exchange technique. This theoretical model is significant for the design and fabrication of EDWA with ion exchange technique. Furthermore, a single polarization EDWA, which operates at wavelength from 1528 nm to 1541 nm for HE polarization, is numerically designed. 展开更多
关键词 graded index channel waveguide finite difference method full-vectorial mode ion exchange technique
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Wideband dispersion removal and mode separation of Lamb waves based on two-component laser interferometer measurement 被引量:2
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作者 徐琰锋 胡文祥 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第9期261-268,共8页
Ultrasonic Lamb waves are considered as a sensitive and effective tool for nondestructive testing and evaluation of plate-like or pipe-like structures. The nature of multimode and dispersion causes the wave packets to... Ultrasonic Lamb waves are considered as a sensitive and effective tool for nondestructive testing and evaluation of plate-like or pipe-like structures. The nature of multimode and dispersion causes the wave packets to spread, and the modes overlap in both time and frequency domains as they propagate through the structures. By using a two-component laser interferometer technique, in combination with a priori knowledge of the dispersion characteristics and wave structure information of Lamb wave modes, a two-component signal processing technique is presented for implementing dispersion removal and mode separation simultaneously for two modes mixture signals of Lamb waves. The proposed algorithm is first processed and verified using synthetic Lamb wave signals. Then, the two-component displacements test experiment is conducted using different aluminum plate samples. Moreover, we confirm the effectiveness and robustness of this method. 展开更多
关键词 Lamb wave dispersion compensation mode separation two-component measurement
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Optimal design of the separate type heat pipe heat exchanger 被引量:2
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作者 俞自涛 胡亚才 岑可法 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第B08期23-28,共6页
Separate type heat pipe heat exchangers are often used for large-scale heat exchanging. The arrangement of such a heat exchanger conveniently allows heat input to and output from the heat exchanger at remote locations... Separate type heat pipe heat exchangers are often used for large-scale heat exchanging. The arrangement of such a heat exchanger conveniently allows heat input to and output from the heat exchanger at remote locations. The traditional method of designing an ordinary HPHE (heat pipe heat exchanger) is commonly applied in the separate type exchanger design, but the calculations have to be carried out separately, which makes it very complicated. In this work, the ε-NTU (effectiveness-Number of Transfer Units) method was applied for optimization analysis of single- or multi-level separate type heat pipe heat exchangers. An optimizing formula for single-level separate type heat pipe heat exchangers was obtained. The optimizing principles of effec- tiveness-NTU and heat transfer rate by the equal distribution method for multi-level separate type heat pipe heat exchanger are presented. The design of separate type heat pipe heat exchangers by the optimizing method is more convenient and faster than by the traditional method. 展开更多
关键词 separate type heat pipe heat exchanger Optimal design ε-NTU (effectiveness-Number of Transfer Units)
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Continuous Separation of Cesium Based on NiHCF/PTCF Electrode by Electrochemically Switched Ion Exchange 被引量:1
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作者 孙斌 郝晓刚 +3 位作者 王忠德 张忠林 刘世斌 官国清 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第5期837-842,共6页
Nickel hexacyanoferrate (NiHCF) film was synthesized on porous three-dimensional carbon felt (PTCF) substrate by repetitious batch chemical depositions, and the NiHCF/PTCF electrode was used as electrochemically switc... Nickel hexacyanoferrate (NiHCF) film was synthesized on porous three-dimensional carbon felt (PTCF) substrate by repetitious batch chemical depositions, and the NiHCF/PTCF electrode was used as electrochemically switched ion exchange (ESIX) electrode in a packed bed for continuous separation for cesium ions. The morphologies of the prepared electrodes were characterized by scanning electron microscopy and the effects of solution concentration on the ion-exchange capacity of the electrodes were investigated by cyclic voltammetry technique. Cycling stability and long-term storage stability of NiHCF/PTCF electrodes were also studied. The NiHCF/PTCF electrodes with excellent ion-exchange ability were used to assemble a diaphragm-isolated ESIX reactor for cesium separation. Continuous separation of cesium and regeneration of NiHCF/PTCF electrode based on the diaphragm-isolated reactor were performed in a laboratory-scale two-electrode system. 展开更多
关键词 nickel hexacyanoferrate electrochemically switched ion exchange cesium separation porous carbon felt
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Simulation and heat exchanger network designs for a novel single-column cryogenic air separation process
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作者 Quancong Zhang Zuqian Wu +2 位作者 Zhikai Cao Qingyin Jiang Hua Zhou 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第7期1498-1509,共12页
To realize the industrialization of the novel single-column air separation process proposed in previous work,steady-state simulation for four different configurations of the single-column process with ternary(nitrogen... To realize the industrialization of the novel single-column air separation process proposed in previous work,steady-state simulation for four different configurations of the single-column process with ternary(nitrogen,oxygen and argon)is developed.Then,exergy analysis of the single-column processes is also carried out and compared with the conventional double-column air separation process at the same capacity.Furthermore,based on the steady-state simulation of single-column processes,the different heat exchanger networks(HENs)for the main heat exchanger and subcooler in each process are designed.To obtain better performance for this novel process,optimization of process configuration and operation is investigated.The optimal condition and configuration for this process is consisted as:feedstock is divided into two streams and the reflux nitrogen is compressed at the approximate temperature of 301 K.In addition,HEN is optimized to minimize the utilities.HENs without utilities are obtained for the four different configurations of single-column process.Furthermore,capital costs of the HEN for different cases are estimated and compared. 展开更多
关键词 CRYOGENIC air separation Single-column Exergy PINCH technology Heat exchange network
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Poly [ (chloromethyl) styrene-co-divinylbenzene] Continuous Rod Column of Weak Cation Exchange Chromatography and its Applications in the Separation of Biopolymers
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作者 Quan Zhou LUO Yin Mao WEI +2 位作者 Tong LIU Gen Hu LEI Xin Du GENG(Institute of Modem Separation Science. Shaanxi Provincial Key Laboratory of Modem SeparationScience. Northwest University. Xi’an 710069) 《Chinese Chemical Letters》 SCIE CAS CSCD 1999年第3期215-218,共4页
Macroporous poly [(chloromethyl) styrene-co-divinylbenzene] continuous rod was prepared by direct polymerization of the monomers in the presence of a porogenic diluent inside an empty chromatographic column. A new ... Macroporous poly [(chloromethyl) styrene-co-divinylbenzene] continuous rod was prepared by direct polymerization of the monomers in the presence of a porogenic diluent inside an empty chromatographic column. A new 'in-situ' technique was used to modify the synthesized polymer rod for a weak cation exchanger and it has been used successfully for the separation of biopolymers. It was found that the back pressure of the continuous rod column was much lower and its surface was proved to be modified well. 展开更多
关键词 liquid chromatography weak cation exchange polymer continuous rod modification BIOPOLYMER separATION
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Separation of Neutral Amino Acids with Ligand Exchange Resins
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作者 Wang Shouting, Wang Busen and He Binglin (Institute of Polymer Chemistry, Nankai University, Tian jin) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1990年第4期373-377,共5页
Four neutral amino acids (Gly, Ala,.Val and Leu) were separated with ligand exchange resins. The separation capacity of the ligand exchange resins is compared with that of common ion exchange resins. The effects of el... Four neutral amino acids (Gly, Ala,.Val and Leu) were separated with ligand exchange resins. The separation capacity of the ligand exchange resins is compared with that of common ion exchange resins. The effects of eluent, column temperature, and central metal ions of the support on the separation are studied. The relationship between matrix structure of resins and their separation capacity is analysed. 展开更多
关键词 Ligand exchange resins Neutral amino acids separATION
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Mode separation of resonant cavity by electromagnetic simulation
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作者 吴群 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2001年第1期27-29,共3页
Presents the investigation of characteristics of mode separation in typical magnetron cavity for the great importance of precise prediction of mode separation used in the theoretical study and engineering design of ma... Presents the investigation of characteristics of mode separation in typical magnetron cavity for the great importance of precise prediction of mode separation used in the theoretical study and engineering design of magnetrons, and the comparative theoretical predication and simulation analysis made using field theory and computer simulation based on commercial EDA tools, Ansoft High Frequency Structure Simulator(HFSS)and POISSON SUPERFISH. 展开更多
关键词 resonant cavity mode separation SIMULATION
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Effects of Polar Organic Solvent on Separation of Y(edta)^-/Nd(edta)^- Complexes on Polyacrylic Anion Exchangers
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作者 Halina Hubicka Dorota Kolodynska 《Journal of Rare Earths》 SCIE EI CAS CSCD 2005年第1期124-128,共5页
The use of polar organic solvents for the separations of rare earth elements (Ⅲ) is effective especially for their extensive separations despite the solubility limitations. The study shows that polyacrylate anion exc... The use of polar organic solvents for the separations of rare earth elements (Ⅲ) is effective especially for their extensive separations despite the solubility limitations. The study shows that polyacrylate anion exchangers, particularly the weakly basic, gel anion exchanger Amberlite IRA 68, can be applied to the separation of rare earth complexes with EDTA in H_2O-methanol and H_2O-ethanol systems. In most cases the determined distribution coefficients of Ln^(3+) complexes with EDTA in mixed media like water-methanol on polyacrylate anion exchangers are larger than those in pure water (media.) 展开更多
关键词 polar organic solvent Y(edta)^-/Nd(edta)^- separation ion exchange rare earths
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Prediction of Instability Separation Modes and Its Application in Practical Dynamic Security Region
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作者 曾沅 余贻鑫 +3 位作者 王红梅 闵亮 张沛 LEES T 《Transactions of Tianjin University》 EI CAS 2007年第3期157-162,共6页
The transient critical boundary of dynamic security region (DSR) can be approximated by a few hyper planes correlated with instability separation modes. A method to fast predict instability separation modes is propose... The transient critical boundary of dynamic security region (DSR) can be approximated by a few hyper planes correlated with instability separation modes. A method to fast predict instability separation modes is proposed for DSR calculation in power injection space. The method identifies coherent generation groups by the developed K-medoids algorithm, taking a similarity matrix derived from the reachability Grammian as the index. As an experimental result, reachability Grammian matrices under local injections are approximately invariant. It indicates that the generator coherency identifications are nearly consistent for different injections. Then instability separation modes can be predicted at the normal operating point, while average initial acceleration is considered as the measure of the critical generator group to amend the error. Moreover, based on these predicted instability separation modes, a critical point search strategy for DSR calculation is illustrated in the reduced injection space of the critical generators. The proposed method was evaluated using New England Test System, and the computation accuracy and speed in determining the practical DSR were improved. 展开更多
关键词 instability separation mode dynamic security region K-medoids algorithm reachability Grammian
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Energy Analysis of a Counter-Flow Plate Heat Exchanger Working in Stationary Mode and Using Geothermal Energy for Drying
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作者 Jean Pierre Tine Biram Dieng +1 位作者 Mouhamadou Lamine Cisse Marie Pascaline Sarr 《材料科学与工程(中英文A版)》 2019年第2期64-74,共11页
This paper presents an energy analysis of a counter-flow plate heat exchanger operating in stationary mode. The exchanger comprises a rectangular plate of which we vary the heat transfer surface (by fixing its width a... This paper presents an energy analysis of a counter-flow plate heat exchanger operating in stationary mode. The exchanger comprises a rectangular plate of which we vary the heat transfer surface (by fixing its width and varying its length) and analyze the evolution of some parameters as a function of this heat transfer surface. The parameters to be analyzed are the NTU (number of transfer units), the effectiveness, the temperatures of both primary and secondary fluids and the heat flux. The analysis carried out will help understand the behavior of the counter-flow plate heat exchanger operating in stationary mode. Then, the heat transfer surface of the exchanger is determined for the sizing of a counter-flow plate heat exchanger intended to produce hot air for drying. That plate heat exchanger uses water vapor heated by geothermal energy as a primary fluid and atmospheric air as a secondary fluid. The products to be dried are onions with a mass flow of water to be evacuated of 100 kg/h. 展开更多
关键词 exchangER flux temperature GEOTHERMAL STATIONARY mode
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