以某钢铁企业烧结过程,即烧结终点(Burning Though Point,BTP)优化控制系统为对象,针对当前控制软件存在开放性差、结构固定、可重用程度低的问题,提出一种多层分布式软件体系结构。在分析系统结构、接口和交互模式的基础上,给出系统开...以某钢铁企业烧结过程,即烧结终点(Burning Though Point,BTP)优化控制系统为对象,针对当前控制软件存在开放性差、结构固定、可重用程度低的问题,提出一种多层分布式软件体系结构。在分析系统结构、接口和交互模式的基础上,给出系统开发的实施方案,从而建立了一个基于Windows DNS的开放的、有强交互能力和扩展能力的分布式BTP优化控制系统。展开更多
The extraction behavior of several lanthanides（La^3＋, Eu^3＋, Lu^3＋） from nitric acid（HNO3） solution was studied using a novel extraction system based on 2,6-bis（5,6-dihexyl-1,2,4-triazin-3-yl） pyridine（isohe...The extraction behavior of several lanthanides（La^3＋, Eu^3＋, Lu^3＋） from nitric acid（HNO3） solution was studied using a novel extraction system based on 2,6-bis（5,6-dihexyl-1,2,4-triazin-3-yl） pyridine（isohexyl-BTP） as extractant in 1-alkyl-3-methylimidazolium bis（trifluoromethylsufonyl）imide（[Cnmim][NTf2]） ionic liquid. Isohexyl-BTP in ionic liquids exhibited remarkably better extraction performance for lanthanides than that in octanol-dodecane（3：7 v/v） system. Lower HNO3 concentration and short alkyl chain length of [Cnmim]^＋ were more favourable for removal of lanthanides. Besides, it was confirmed that isohexyl-BTP in ILs formed a 1：3 complex [Ln（BTP）3（NO3）n]^（3–n）＋（n=0, 1） by slope analysis. In addition, [C2mim][NTf2] preferred to extract lanthanides via a cation exchange mechanism at lower acidity, which was proved via UV-Vis measurement. It was speculated that extraction mechanism shifted from cation exchange to neutral species extraction with increase in HNO3 concentration and alkyl chain length of [Cnmim]^＋ due to the H^＋ completion, NO3^- inhibition and hydrophobicity of IL.展开更多
Extraction behavior of lanthanides(La, Eu, Dy, Lu) from HNO3 solution was studied using a novel extraction system with hydrophobic ionic liquid being diluent and isobutyl-BTP being extractant. Compared with that in is...Extraction behavior of lanthanides(La, Eu, Dy, Lu) from HNO3 solution was studied using a novel extraction system with hydrophobic ionic liquid being diluent and isobutyl-BTP being extractant. Compared with that in isobutyl-BTP/cyclohexane extraction system, application of ionic liquid as the extracting phase provided unprecedented enhancement of the extraction performance of isobutyl-BTP for lanthanides. It was found that the isobutyl-BTP/[Cnmim][NTf2] extraction system is favorable to get good extraction at low acidity condition(< 0.1 M). Of all the isobutyl-BTP/ [C n mim][NTf2](n = 2, 6, 8) systems, isobutyl-BTP/[C2mim][NTf2]extraction system provides the best extraction performance and fastest extraction kinetics within 5 min towards Dy3+. The extraction is spontaneous endothermic and temperature is good for extraction. The transfer of lanthanides, in isobutyl-BTP/[C2mim][NTf2] extraction system, proceeded via a cation exchange mechanism, in contrast to extraction of neutral complex in the cyclohexane system.展开更多
Radiofrequency ablation (RFA) has been clinically employed in Japan, and its usefulness in the treatment of hepatocellular carcinoma (HCC) has been reported by many researchers. In the present study, the convex punctu...Radiofrequency ablation (RFA) has been clinically employed in Japan, and its usefulness in the treatment of hepatocellular carcinoma (HCC) has been reported by many researchers. In the present study, the convex puncture probe PVT-350BTP, rather than a conventional convex probe, was used for RFA for the treatment of HCC and its usefulness was assessed. At the same time, evaluation of the therapeutic effect using ultrasound contrast agent was investigated. The subjects were 20 patients (16 men and 4 women) with 20 HCC nodules as confirmed by contrast CT or abdominal angiography. No nodules were ≤1.0 cm in diameter, 12 were 1.1 cm - 2.0 cm, and 8 were 2.1 cm - 3.0 cm. An Aplio diagnostic ultrasound system (Toshiba Medical Systems, Tokyo, Japan) and the PVT-350BTP probe (Toshiba) were employed for RFA. The PVT-350BTP supports puncture angles of 55, 70, 85, and 100 degrees. By mounting various types of puncture adapters on the probe, 13 G to 22 G puncture needles can be used. The needle can easily be attached and detached by operating a lever. Contrast echo studies with Levovist were performed before and after RFA, and the results were evaluated using the Advanced Dynamic Flow (ADF) imaging technique. Puncture was performed successfully using this probe for 20 cases with 20 nodules. It was confirmed that RFA with the PVT-350BTP permits percutaneous treatment to be performed more reliably than with a conventional probe.展开更多
The adsorption behavior of241Am(Ⅲ) and Eu(Ⅲ) by silica/polymer-based iso Hex-BTP adsorbent(iso HexBTP/Si O2-P) was investigated by a batch experiment method. iso Hex-BTP/Si O2-P exhibited high affinity and selectivi...The adsorption behavior of241Am(Ⅲ) and Eu(Ⅲ) by silica/polymer-based iso Hex-BTP adsorbent(iso HexBTP/Si O2-P) was investigated by a batch experiment method. iso Hex-BTP/Si O2-P exhibited high affinity and selectivity for241Am(Ⅲ) over152Eu(Ⅲ) in 2–4 mol/dm3 nitric acid solutions. Within the experimental contact time range of 0.5–24 h, iso Hex-BTP/Si O2-P showed high selectivity for241Am(Ⅲ) compared to152Eu(Ⅲ) in3 mol/dm3 nitric acid solution. However, the adsorption kinetics of241Am(Ⅲ) and152Eu(Ⅲ) was slow. Eu(Ⅲ)adsorption followed the pseudo-second-order kinetic model, indicating chemical adsorption as the rate-limiting step of the adsorption process. And the adsorption agreed well with the Langmuir adsorption model at various temperatures. The adsorption kinetics and isotherm data indicated that the equilibrium adsorption capacity, the adsorption rate, the maximum adsorption capacity and the adsorption affinity, increased with temperature. The thermodynamic parameters, negative change in Gibbs free energy, and positive change in enthalpy and entropy,suggested that the adsorption of Eu(Ⅲ) was spontaneous and endothermic process with an increase of entropy.展开更多
文摘以某钢铁企业烧结过程,即烧结终点(Burning Though Point,BTP)优化控制系统为对象,针对当前控制软件存在开放性差、结构固定、可重用程度低的问题,提出一种多层分布式软件体系结构。在分析系统结构、接口和交互模式的基础上,给出系统开发的实施方案,从而建立了一个基于Windows DNS的开放的、有强交互能力和扩展能力的分布式BTP优化控制系统。
基金supported by the National Natural Science Foundation of China(11475112)the Ph.D.Programs of Foundation of Ministry of Education of China(20130073120051)
文摘The extraction behavior of several lanthanides（La^3＋, Eu^3＋, Lu^3＋） from nitric acid（HNO3） solution was studied using a novel extraction system based on 2,6-bis（5,6-dihexyl-1,2,4-triazin-3-yl） pyridine（isohexyl-BTP） as extractant in 1-alkyl-3-methylimidazolium bis（trifluoromethylsufonyl）imide（[Cnmim][NTf2]） ionic liquid. Isohexyl-BTP in ionic liquids exhibited remarkably better extraction performance for lanthanides than that in octanol-dodecane（3：7 v/v） system. Lower HNO3 concentration and short alkyl chain length of [Cnmim]^＋ were more favourable for removal of lanthanides. Besides, it was confirmed that isohexyl-BTP in ILs formed a 1：3 complex [Ln（BTP）3（NO3）n]^（3–n）＋（n=0, 1） by slope analysis. In addition, [C2mim][NTf2] preferred to extract lanthanides via a cation exchange mechanism at lower acidity, which was proved via UV-Vis measurement. It was speculated that extraction mechanism shifted from cation exchange to neutral species extraction with increase in HNO3 concentration and alkyl chain length of [Cnmim]^＋ due to the H^＋ completion, NO3^- inhibition and hydrophobicity of IL.
基金Supported by the National Natural Science Foundation of China(Nos.91126006 and 11475112)the Ph.D.Programs Foundation of Ministry of Education of China(No.20130073120051)the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning
文摘Extraction behavior of lanthanides(La, Eu, Dy, Lu) from HNO3 solution was studied using a novel extraction system with hydrophobic ionic liquid being diluent and isobutyl-BTP being extractant. Compared with that in isobutyl-BTP/cyclohexane extraction system, application of ionic liquid as the extracting phase provided unprecedented enhancement of the extraction performance of isobutyl-BTP for lanthanides. It was found that the isobutyl-BTP/[Cnmim][NTf2] extraction system is favorable to get good extraction at low acidity condition(< 0.1 M). Of all the isobutyl-BTP/ [C n mim][NTf2](n = 2, 6, 8) systems, isobutyl-BTP/[C2mim][NTf2]extraction system provides the best extraction performance and fastest extraction kinetics within 5 min towards Dy3+. The extraction is spontaneous endothermic and temperature is good for extraction. The transfer of lanthanides, in isobutyl-BTP/[C2mim][NTf2] extraction system, proceeded via a cation exchange mechanism, in contrast to extraction of neutral complex in the cyclohexane system.
文摘Radiofrequency ablation (RFA) has been clinically employed in Japan, and its usefulness in the treatment of hepatocellular carcinoma (HCC) has been reported by many researchers. In the present study, the convex puncture probe PVT-350BTP, rather than a conventional convex probe, was used for RFA for the treatment of HCC and its usefulness was assessed. At the same time, evaluation of the therapeutic effect using ultrasound contrast agent was investigated. The subjects were 20 patients (16 men and 4 women) with 20 HCC nodules as confirmed by contrast CT or abdominal angiography. No nodules were ≤1.0 cm in diameter, 12 were 1.1 cm - 2.0 cm, and 8 were 2.1 cm - 3.0 cm. An Aplio diagnostic ultrasound system (Toshiba Medical Systems, Tokyo, Japan) and the PVT-350BTP probe (Toshiba) were employed for RFA. The PVT-350BTP supports puncture angles of 55, 70, 85, and 100 degrees. By mounting various types of puncture adapters on the probe, 13 G to 22 G puncture needles can be used. The needle can easily be attached and detached by operating a lever. Contrast echo studies with Levovist were performed before and after RFA, and the results were evaluated using the Advanced Dynamic Flow (ADF) imaging technique. Puncture was performed successfully using this probe for 20 cases with 20 nodules. It was confirmed that RFA with the PVT-350BTP permits percutaneous treatment to be performed more reliably than with a conventional probe.
基金Supported by National Natural Science Foundation of China(Nos.11305102,91126006,21261140335 and 91226111)Doctoral Fund of Ministry of Education of China(No.20130073110046)
文摘The adsorption behavior of241Am(Ⅲ) and Eu(Ⅲ) by silica/polymer-based iso Hex-BTP adsorbent(iso HexBTP/Si O2-P) was investigated by a batch experiment method. iso Hex-BTP/Si O2-P exhibited high affinity and selectivity for241Am(Ⅲ) over152Eu(Ⅲ) in 2–4 mol/dm3 nitric acid solutions. Within the experimental contact time range of 0.5–24 h, iso Hex-BTP/Si O2-P showed high selectivity for241Am(Ⅲ) compared to152Eu(Ⅲ) in3 mol/dm3 nitric acid solution. However, the adsorption kinetics of241Am(Ⅲ) and152Eu(Ⅲ) was slow. Eu(Ⅲ)adsorption followed the pseudo-second-order kinetic model, indicating chemical adsorption as the rate-limiting step of the adsorption process. And the adsorption agreed well with the Langmuir adsorption model at various temperatures. The adsorption kinetics and isotherm data indicated that the equilibrium adsorption capacity, the adsorption rate, the maximum adsorption capacity and the adsorption affinity, increased with temperature. The thermodynamic parameters, negative change in Gibbs free energy, and positive change in enthalpy and entropy,suggested that the adsorption of Eu(Ⅲ) was spontaneous and endothermic process with an increase of entropy.
