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A Proposed Core Catcher System and Thermite Experimental Results

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journal of Energy and Power Engineering 2011年第11期5卷 1005-1014页

作者： h.Y. kim j.h. kim K.S. ha j.h. Song j.h. Park Thermal hydraulics Safety Research Division Korea Atomic Energy Research Institute Daejeon 305-353 Korea

To prevent direct contact of the melt and basemat concrete of the cavity in a postulated core melt accident, a core catcher concept is suggested. Upon ablation of the sacrificial layer on top of the core catcher while molten core material is discharged, a mixture of water and gas is injected from below. It is expected that a simultaneous injection of water and gas could prevent a possible steam explosion/spike and also suppress the rapid release of steam which might result in fast over-pressurization of the containment. A test facility for the core catcher using a thermite reaction technique for the generation of the melt was designed and constructed at Korea Atomic Energy Research Institute （KAERI）. The first series of tests were performed by using a mixture of Al, Fe2O3, and CaO as a stimulant. As a first try, only water was injected from the bottom of the melt through five water injection nozzles when the melt front reached the water injection nozzles. A description of the test facility for the core catcher, the thermite composition, and the methods of experiment is included. The test results are discussed.

关键词： Core catcher corium cooling sacrificial layer water injection severe accidient thermite reaction.

Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.T.jeong S.W.Lee W.j.kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the hCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

对FIGOⅠB～ⅡB期宫颈癌患者行子宫切除术后的放射治疗

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世界核心医学期刊文摘（妇产科学分册） 2005年第6期1卷 47-48页

作者： kim j.h. kim h.j. 侯巍

This study is a retrospective analysis of stage Ⅰ B- Ⅱ B cervical carcinoma patients who had received postoperative radiotherapy (PORT). Eight hundred patients with stage Ⅰ B- Ⅱ B cervical carcinomas who received PORT after radical hysterectomy and bilateral pelvic lymph node dissection (PLND) between February 1979 and March 2000 were analyzed. The median follow- up duration was 100 months. The 5- year overall survival (OS) and disease- free survival (DFS) rates were 88% and 81% , respectively. One hundred forty- six patients (18% ) failed, and 103 of these had distant metastases. Multivariate analysis revealed that pelvic lymph node (LN) metastasis significantly compromised OS, DFS, pelvic failure- free survival (PFFS), and distant failure- free survival (DFFS) (P h age hovascular space invasion (LVSI) were significantly associated with a higher risk of distant metastasis after PORT. The incidences of late rectal, urinary, and small bowel complications of grade 3 or higher were 1.6% , 1.4% , and 1.0% , respectively. PORT achieved good OS and DFS in the patients with risk factors after radical hysterectomy for stage IB- IIB cervical carcinomas. Distant metastasis was the major pattern of treatment failure after PORT. Effective systemic chemotherapy might be a breakthrough in improving the outcome of PORT in patients with cervical carcinomas.

关键词：子宫切除术 FIGO 放射治疗间质浸润淋巴结清扫术系统化疗淋巴结转移多元分析血管腔

应用双结扎技术进行内镜黏膜下切除术治疗直肠小类癌

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世界核心医学期刊文摘（胃肠病学分册） 2006年第10期2卷 27-28页

作者： Moon j.h. kim j.h. Park C.h. 孟欣颖 Division of Gastroenterology Department of Internal MedicineHallym University896 Pyungchon-dongDongan-guAnyang-CityKyungki-do 431-796South Korea.Dr

Background and Study Aims: It is difficult to achieve complete endoscopic resection of rectal carcinoid tumors without any procedure-related complications. In this study, we evaluated the efficacy and safety of endoscopic submucosal resection with double ligation (ESMR-DL) for the treatment of small rectal carcinoid tumors. Patients and Methods: Eleven rectal carcinoid tumors (in 11 patients) were resected by ESMR-DL between November 2001 and April 2004, using a conventional single-channel endoscope with an attached band-ligator device. The lesion was aspirated into the ligator device and an elastic band was placed around the base; a detachable snare was then used to ligate the stalk below the elastic band; and snare resection was performed above the elastic band. The resected specimens were examined with respect to size, histological atypia, depth of invasion, and the histological appearance of the resection margins. Results: All the lesions were excised completely without any complications. There was no tumor invasion beyond the submucosal layer and there was no evidence of atypia in any of the specimens. Tumor diameter varied from 2.0 mm to 10.0 mm (average 6.2 mm). None of the 11 specimens showed histopathological evidence of tumor involvement at the resection margins. There were no immediate or late complications (bleeding or perforation) after ESMR-DL. There was no local recurrence and there were no distant metastases in any patients during the mean follow-up period of 18 months. Conclusion: Endoscopic submucosal resection with double ligation is a useful and safe method for the treatment of small rectal carcinoid tumors.

关键词：类癌切除术双结切缘圈套器浸润深度肿瘤浸润套扎不典型增生不典型性

磁共振成像技术研究先天性纤维化综合征和协同肌分离患者的先天动眼神经发育不全及外展神经缺失

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世界核心医学期刊文摘（眼科学分册） 2005年第11期1卷 58-59页

作者： kim j.h. hwang j.-M. 宋虎平 Department of Ophthalmology Seoul Natl. Univ. Coll. of Medicine SeoulNatl. Univ. BundangHospital 300Gumi-dongBun dang-gu Seongnam Gyeonggi-do 463-707 South KoreaDr.

Objective: There is only one neuropathologic report of congenital fibrosis of the extraocular muscles (CFEOM), and none of synergistic divergence. The aim of this report was to study the oculomotor nerve and the abducens nerve in 2 such p atients with magnetic resonance imaging. Design: Observational case reports. Met hods: Ophthalmologic examination and thin-sectioned magnetic resonance imaging across the brainstem level were performed in 2 patients with CFEOM and synergist ic divergence. To confirm the accuracy of the procedure, we compared the results obtained with those of a control group of 40 individuals using the same techniq ue. Main Outcome Measures: The oculomotor nerve and the abducens nerve on magnet ic resonance imaging. Results: Magnetic resonance imaging disclosed bilateral hy poplasia of the oculomotor nerve in both patients, and absence of the abducens n erve on the affected side of synergistic divergence. The oculomotor and abducens nerves were observed in 80 of 80 eyes (100%) screened as controls. C onclusions: In both patients with CFEOM and synergistic divergence, the oculomot or nerve was hypoplastic bilaterally, and the abducens nerve was absent on the s ide exhibiting synergistic divergence.

关键词：磁共振成像技术协同肌发育不全眼外肌核磁共振成像神经病理眼科检查薄层扫描发育不良理性报

The quasi-Gramian solution of a non-commutative extension of the higher-order nonlinear Schr?dinger equation

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Communications in Theoretical Physics 2024年第3期76卷 51-61页

作者： h W A Riaz j Lin Department of Physics Zhejiang Normal UniversityJinhua 321004China

The nonlinear Schr?dinger(NLS)equation,which incorporates higher-order dispersive terms,is widely employed in the theoretical analysis of various physical *** this study,we explore the non-commutative extension of the higher-order NLS *** treat real or complex-valued functions,such as g_(1)=g_(1)(x,t)and g_(2)=g_(2)(x,t)as non-commutative,and employ the Lax pair associated with the evolution equation,as in the commutation *** derive the quasi-Gramian solution of the system by employing a binary Darboux *** soliton solutions are presented explicitly within the framework of *** visually understand the dynamics and solutions in the given example,we also provide simulations illustrating the associated ***,the solution can be used to study the stability of plane waves and to understand the generation of periodic patterns within the context of modulational instability.

关键词： integrable systems Darboux transformation solitons

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腹膜内高温灌注化疗对卵巢癌的作用

世界核心医学期刊文摘（妇产科学分册） 2005年第1期1卷 45-46页

作者： Ryu K.S. kim j.h. Ko h.S. j.M. Lee 王雪莹 Dept. of Obstetrics and Gynecology Kangnam Saint Mary’s HospitalThe Catholic University of Korea Seoul South Korea

Objectives. To evaluate the clinical effect of intraperitoneal hypert hermic ch emotherapy (IPhC) in ovarian cancer patients. Patients and methods. We retrospec tively reviewed 117 stages Ic-III ovarian cancer patients, who were diagnosed a t the Gynecology Department of Kangnam St. Marys hospital between january 1994 and january 2000. Of these, 57 patients underwent cytoreductive surgery (conven tional treatment)with IPhC and 60 patients (control group) underwent conventiona l treatment only. IPhC consisted of administering a mixture of 350 mg/m2 of carb oplatin and 5,000,000 IU/m2 of interferon-α, and maintaining the intraperitone al temperature at 43-44°C during surgery. Results. The overall 5-year surviva l rate was 58.6%; that of the IPhC group was 63.4%vs. 52.8%in the control group, w ith significantly higher survival in the IPhC group (P = 0.0078). Considering st age III ovarian cancer patients only (n = 74), the survival rate was 53.8%in th e IPhC group (n = 35) and 33.3%in the control group (n = 39) and was significan tly higher in the IPhC group (P = 0.0015). For stage III ovarian cancer patients whose tumor was reduced to less than 1 cm during a second procedure (n = 53), t he 5-year survival rate was 65.6%in patients who underwent IPhC (n = 26) and 4 0.7%in the control patients (n = 27) (P = 0.0046). IPhC was an independent prog nostic factor that was not affected by surgical staging, tumor size after second surgery, or patient age, according to a multivariate analysis (hazard ratio = 0 .496, P = 0.0176). Conclusion. Our study suggests that IPhC is a promising new t reatment modality in ovarian cancer.

关键词：高温灌注化疗腹膜内 Ⅲ期卵巢癌细胞减灭术手术分期医院妇科 α-干扰素临床疗效多变量分析

Convexification of hybrid AC-DC Optimal Power Flow with Line-Commutated Converters

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CSEE journal of Power and Energy Systems 2024年第2期10卷 617-628页

作者： hongyuan Liang Zhigang Li j.h.Zheng Q.h.Wu School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China

Line-commutated converter (LCC)-based high-voltage DC (hVDC) systems have been integrated with bulk AC power grids for interregional transmission of renewable power. The nonlinear LCC model brings additional nonconvexity to optimal power flow (OPF) of hybrid AC-DC power grids. A convexification method for the LCC station model could address such nonconvexity but has rarely been discussed. We devise an equivalent reformulation for classical LCC station models that facilitates second-order cone convex relaxation for the OPF of LCC-based AC-DC power grids. We also propose sufficient conditions for exactness of convex relaxation with its proof. Equivalence of the proposed LCC station models and properties, exactness, and effectiveness of convex relaxation are verified using four numerical simulations. Simulation results demonstrate a globally optimal solution of the original OPF can be efficiently obtained from relaxed model.

关键词： AC-DC power system convex relaxation linecommutated converter optimal power flow second-order cone programming

Boosted Lithium-Ion Transport Kinetics in n-Type Siloxene Anodes Enabled by Selective Nucleophilic Substitution of Phosphorus

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Nano-Micro Letters 2024年第10期16卷 618-637页

作者： Se In kim Woong-ju kim jin Gu Kang Dong-Wan kim School of Civil Environmental and Architectural EngineeringKorea University02841 SeoulSouth Korea Nanophotonics Research Center Korea Institute of Science and Technology02792 SeoulSouth Korea

Doped two-dimensional(2D)materials hold significant promise for advancing many technologies,such as microelectronics,optoelectronics,and energy ***,n-type 2D oxidized Si nanosheets,namely n-type siloxene(n-SX),are employed as Li-ion battery *** thermal evaporation of sodium hypophosphite at 275℃,P atoms are effectively incorporated into siloxene(SX)without compromising its 2D layered morphology and unique Kautsky-type crystal ***,selective nucleophilic substitution occurs,with only Si atoms being replaced by P atoms in the O_(3)≡Si-h *** resulting n-SX possesses two delocalized electrons arising from the presence of two electron donor types:(i)P atoms residing in Si sites and(ii)h *** doping concentrations are varied by controlling the amount of precursors or their mean free *** at 2000 mA g^(-1),the n-SX electrode with the optimized doping concentration(6.7×10^(19) atoms cm^(-3))delivers a capacity of 594 mAh g^(-1) with a 73%capacity retention after 500 *** improvements originate from the enhanced kinetics of charge transport processes,including electronic conduction,charge transfer,and solid-state *** approach proposed herein offers an unprecedented route for engineering SX anodes to boost Li-ion storage.

关键词： Li-ion battery Two-dimensional N-type siloxene Doping mechanism Kinetics