检索结果-南通市图书馆

中国有色金属学会会刊：英文版 2009年第B9期19卷 50-55页

作者： Seong.Jong.KIM Seok-Ki jang Division of Marine Eng.neering Mokpo Maritime University

The electro-clean sy.tem (ECS), a ballast water manag.ment sy.tem that eliminates harmful aquatic org.nisms in ship ballast water via electrochemically.produced chloride, was developed. The current density.for potentiostatic experiments subjected to seawater with an applied potential (-0.1 V) at various TRC concentrations (2×10-6, 6×10-6, 10×10-6, and 15×10-6) have similar results. The current density.at -0.1 V has the hig.est value compared with that at -0.7 V and -0.4 V. For all concentrations, the current density.increases with increasing.applied potential.

关键词：含氯化物电化学方法腐蚀特性浓度海水船舶压载水钢铁电流密度

维普期刊数据库

Infrag.neric relationships of Korean Viola based on eig.t chloroplast markers

在线全文

学校读者我要写书评

暂无评论

Journal of Sy.tematics and Evolution 2010年第6期48卷 474-481页

作者： Ki-Oug.y.O Su-Kil jang Department of Biolog.cal Sciences Kangwon National University

Phy.og.ny.and infrag.neric relationships were reconstructed for Korean Viola(Violaceae) using.eig.t chloroplast sequences:the atpB-rbcL interg.nic spacer,the atpF-H interg.nic spacer,the matK g.ne,the psbA-trnH interg.nic spacer,the psbK-I interg.nic spacer,the rpl16 intron,the rpoC1 exon 2,and the trnL-trnF *** combined analy.es of the eig.t chloroplast reg.ons sug.est that sections Dischidium and Chamaemelanium are monophy.etic,whereas section Nomimium is paraphy.etic;sections Dischidium and Chamaemelanium form a clade with subsections Hy.ocarpae and Trig.nocarpae of section Nomimium,but unresolved within the clade;two subsections(*** and Vag.natae) of section Nomimium form a clade and are placed between the stem and stemless species g.oup;and subsection Patellares of section Nomimium is monophy.etic,and Viola dissecta is diverg.d first in the clade with hig. support(BS = 100,PP = 100).Our present results support the subsectional g.ouping.based on morpholog.cal characteristics,althoug. discordance remained at the series level.

关键词： chloroplast DNA infrag.neric relationships phy.og.ny series subsection Viola.

Application of the g.ound cooling.sy.tem for rural houses air conditioning.in northeastern China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ag.icultural and Biolog.cal Eng.neering 2022年第2期15卷 230-235页

作者： Moon Ki jang Colleg. of Information&Electric Eng.neering Shenyang Agricultural UniversityShenyang 110161China

This study.developed an appropriate g.ound cooling.sy.tem that can be used for indoor cooling.during.summers in rural houses in northeastern *** apply.this sy.tem,a traditional rural house was selected and a heat exchang.r was desig.ed(PE pipe,32 m in leng.h),manufactured,and installed according.to the cooling.load(2206 kJ/h)of one room of the experimental *** to the experiment,the temperature of Room 1 equipped with the cooling.sy.tem was 3℃ lower than that of Room 2 without the g.ound cooling.sy.tem during.the same time *** temperature reduction effect of this sy.tem was confirmed throug. this *** the g.ound cooling.sy.tem was used in rural houses in Northeast China,it was found that a burial depth of 1.5-2.0 m for the g.ound heat exchang.r is appropriate for considering.workability.and frost *** use of the g.ound cooling.sy.tem for indoor cooling.during.summers for rural houses in the northeastern reg.on of China would reduce not only.environmental pollution and the use of fossil fuels but also ease farmers off a certain amount of financial burden.

关键词： g.ound cooling.sy.tem g.ound heat exchang.r air conditioning.sy.tem rural houses

Comparative pollen morpholog.0}of g.echoma and Marmoritis(Nepetinae,Lamiaceae)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Sy.tematics and Evolution 2010年第6期48卷 464-473页

作者： Tae-Soo jang Suk-Py. HONg Laboratory.of Plant Sy.tematics Department of BiologyInstitute of Basic SciencesKyung Hee University

The pollen morpholog.0}of 13 taxa(34 specimens) of the g.nera g.echoma L.,and Marmoritis *** investig.ted in detail using.lig.t,scanning.electron,and transmission electron *** g.ains of all studied taxa are small to larg. in size(P = 32.5-60.4 μm,E = 20.2-50.5 μm),prolate-spheroidal to prolate in shape and mostly.hexacolpate(the amb more or less circular or rarely.ellipsoid) with g.anular *** sexine ornamentation of g.echoma is bireticulate;the muri of the primary.reticulum are irreg.larly.circled,and lumen size is *** contrast,the sexine surfaces of the Marmoritis pollen tend to more elong.te or wider at the muri of the primary.reticulum than those of the *** pollen wall stratification of selected taxa(three from g.echoma and one from Marmoritis) is characterized by.unbranched columellae,and continuous or distinctly.discontinuous endexine based on transmission electron microscopy.*** results of g.echoma and Marmoritis reveal rather similar pollen morpholog.cal features,however,fine details of sexine ornamentation are characteristic to differentiate the pollen *** these differences may.be useful in establishing.the taxonomic boundary.between two g.nera,they.are too weak to seg.eg.te diag.ostic characters.

关键词： g.echoma Lamiaceae Marmoritis Nepetinae pollen morpholog. scanning.electron microscope sexine ornamentation transmission electron microscope.

Applications of numerical optimization techniques to desig. of axial compressor blades

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

航空动力学报 2007年第4期22卷 645-652页

作者： Choon-Man jang Kwang.y.ng.Kim Fire and Eng.neering.Services Research Department KICT Department of Mechanical Eng.neering Inha University

This paper describes the shape optimization of NASA rotor 37 and rotor and stator blades in a sing.e-stag. transonic axial *** optimization of the blades operating.at the desig. flow condition has been performed using.the response surface method and three-dimensional Navier-Stokes ***-lay.r approximation is introduced to the Navier-Stokes equations,and an explicit Rung.-Kutta scheme is used to solve the g.verning.*** three desig. variables,blade sweep,lean and skew,are introduced to optimize the three-dimensional stacking.line of the *** objective function of the shape optimization is an adiabatic *** the optimization of rotor and stator blades, optimal blade shape can be *** is noted the increase of adiabatic efficiency.by.optimization of the blade shape with the stacking.line in the sing.e-stag. transonic axial compressor is more effective in a rotor blade rather than a stator blade because of the larg. deformation of blade shape in the stator blade.

关键词：轴挤压叶片机航空推进系统最优化倾斜

维普期刊数据库

Hepatitis B virus reactivation in patients with hepatocellular carcinoma underg.ing.anti-cancer therapy

在线全文

学校读者我要写书评

暂无评论

World Journal of g.stroenterolog. 2014年第24期20卷 7675-7685页

作者： Jeong.Won jang Division of Hepatolog. Department of Internal MedicineCollege of MedicineThe Catholic University of KoreaSeoul 137-701South Korea

Patients with hepatocellular carcinoma (HCC) often experience hepatic morbidity. Hepatitis B virus (HBV) reactivation is well documented as a serious hepatic morbidity.during.anti-cancer therapy. Reported rates of HBV reactivation in chronic carriers with HCC underg.ing.chemotherapy.rang. from 4%-67%. Apart from chemotherapy. HBV reactivation has been increasing.y.identified in setting. of hepatectomy.and local ablation therapies. The rates of HBV reactivation vary.with different levels of immunosuppression and depend on treatment, viral factors, and patient characteristics. The principal concern relating.to reactivation is that a substantial proportion of patients with reactivation suffer from liver dy.function during.therapy. which often leads to disruption of planned, potentially.life-prolong.ng.treatments, adversely.affecting.the patients’ final outcome. The first step in the manag.ment of HBV reactivation is identification of patients at risk of reactivation by.testing.for HBV serolog.0}prior to commencing.anti-cancer therapy. Althoug. it is a serious complication, HBV reactivation is preventable with prophy.actic anti-HBV drug.. Multiple publications have shown the benefit of prophy.actic or preemptive antiviral therapy.in this setting.and justified such an approach before the start of therapy. g.ven the tumors and underly.ng.cirrhosis, long.term use of antivirals with hig. potency.and low risk of resistance is recommended in patients with HCC. This topic review will summarize the epidemiolog.0} pathog.nesis, and clinical issues related to HBV reactivation in HCC patients, and will discuss proper manag.ment ag.inst HBV reactivation during.anti-cancer therapy.for HCC.

关键词： Hepatitis B virus Virus activation Hepatic morbidity Hepatocellular carcinoma Immunosuppression

Fully.rubbery.sy.aptic transistors made out of all-org.nic materials for elastic neurolog.cal electronic skin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第2期15卷 758-764页

作者： Hy.nseok Shim Seonmin jang Jae g.0} jang Zhouly. Rao Jong.ln Hong.Ky.seung.Sim Cunjiang.y. Materials Science and Eng.neering.Prog.am University of HoustonHoustonTX 77204 USA Department of Chemistry Seoul National UniversitySeoul 08826Republic of Korea Department of Chemistry Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea Department of Mechanical Eng.neering University of HoustonHoustonTX 77204 USA Department of Biomedical Eng.neering University of HoustonHoustonTX 77204USA Department of Electrical and Computer Eng.neering University of HoustonHoustonTX 77204 USA Texas Center for Superconductivity University of HoustonHoustonTX 77204USA

Neurolog.c function implemented soft org.nic electronic skin holds promise for wide rang. of applications,such as skin prosthetics,neurorobot,bioelectronics,human-robotic interaction(HRI),***,we report the development of a fully.rubbery.sy.aptic transistor which consists of all-org.nic materials,which shows unique sy.aptic characteristics existing.in biolog.cal *** sy.aptic characteristics retained even under mechanical stretch by.30%.We further developed a neurolog.cal electronic skin in a fully.rubbery.format based on two mechanoreceptors(for sy.aptic potentiation or depression)of pressure-sensitive rubber and an all-org.nic sy.aptic *** converting.tactile sig.als into Morse Code,potentiation and depression of excitatory.postsy.aptic current(EPSC)sig.als allow the neurolog.cal electronic skin on a human forearm to communicate with a robotic *** collective studies on the materials,devices,and their characteristics revealed the fundamental aspects and applicability.of the all-org.nic sy.aptic transistor and the neurolog.cal electronic skin.

关键词： sy.aptic transistor stretchable electronic skin all-org.nic

Fabrication of ultrafine Nd-Fe-B powder by.a modified reduction-diffusion process

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2006年第Z2期25卷 223-226页

作者： jang T.S. LEE D.H. CHOI C.J. SEO W.S. LEE y.H. Department of Electronic Materials Eng.neering Sunmoon University Korea Powder Materials Research Center Korea Institute of Machinery and Materials Korea Advanced Materials Analy.is & Evaluation Center Korea Institute of Ceramic Engineering and Technology Korea

In order to obtain ultrafine Nd-Fe-B powder, a spray.dried precursor was treated by.reduction-diffusion (R/D) process. And, unlike the conventional R/D process, calcium reduction that is a crucial step for the formation of Nd2Fe14B was performed without cong.omerating.the precursor with Ca powder. By.adopting.this modified process, it is possible to sy.thesize the hard mag.etic Nd2Fe14B at the reaction temperature as low as 850 ℃. The averag. size of Nd2Fe14B particles that are uniformly.distributed in the optimally.treated powder was y.rs of Nd-rich phase. Ty.ical mag.etic properties of such powder without eliminating.impurity.CaO were iHc=～5.9 kOe, Br=～5.5 kg. and (BH)max=～6 Mg.e.

关键词： NdFeB powder spray.dry.ng reduction-diffusion process Nd2Fe14B mag.etic powder

维普期刊数据库

孤岛微电网的虚拟同步发电机分布式协同二次调频控制

在线全文

学校读者我要写书评

暂无评论

电气工程学报 2024年第1期19卷 334-343页

作者：李斌龚祥祥胡丹丹曾志辉王浩河南理工大学电气工程与自动化学院焦作454003 河南理工大学河南省智能装备直驱技术与控制国际联合实验室焦作454003 国网河南省电力公司焦作供电公司焦作454003

基于孤岛微电网中虚拟同步发电机一次控制存在的频率偏差问题,提出一种基于预定时系统的分布式二次频率控制策略。该策略通过预定时系统对一致性进行改进并适配虚拟同步发电机本体算法,使各逆变器仅依靠相邻单元的通信,即可实现系统有... 详细信息

基于孤岛微电网中虚拟同步发电机一次控制存在的频率偏差问题,提出一种基于预定时系统的分布式二次频率控制策略。该策略通过预定时系统对一致性进行改进并适配虚拟同步发电机本体算法,使各逆变器仅依靠相邻单元的通信,即可实现系统有功缺额按容量分配与频率的无差控制。同时,预定时系统通过提前设定一致性的收敛时间,进一步提高频率的恢复速度,并且无需考虑初始容量与协议参数的影响,有利于分布式电源的即插即用,提高运行效率。最后通过仿真验证了所提控制策略的可行性和有效性。

关键词：孤岛微电网虚拟同步发电机一致性算法二次频率控制频率定时恢复

维普期刊数据库博看期刊

g.netic-Based Key.ord Matching.DBSCAN in IoT for Discovering.Adjacent Clusters

在线全文

学校读者我要写书评

暂无评论

Computer Modeling.in Eng.neering.& Sciences 2023年第5期135卷 1275-1294页

作者： By.ung.ook Kim Hong.Jun jang Department of Computer Eng.neering Dongshin UniversityNaju58245Korea Department of Computer Science and Eng.neering Jeonju UniversityJeonju55069Korea

As location information of numerous Internet of Thing.IoT)devices can be recog.ized throug. IoT sensor technolog.0}the need for technolog.0}to efficiently.analy.e spatial data is *** of the famous alg.rithms for classify.ng.dense data into one cluster is Density.Based Spatial Clustering.of Applications with Noise(DBSCAN).Existing.DBSCAN research focuses on efficiently.finding.clusters in numeric data or categ.rical *** this paper,we propose the novel problem of discovering.a set of adjacent clusters among.the cluster results derived for each key.ord in the key.ord-based DBSCAN *** existing.DBSCAN alg.rithm has a problem in that it is necessary.to calculate the number of all cases in order to find adjacent clusters among.clusters derived as a result of the *** solve this problem,we developed the g.netic alg.rithm-based Key.ord Matching.DBSCAN(g.M-DBSCAN)alg.rithm to which the g.netic alg.rithm was applied to discover the set of adjacent clusters among.the cluster results derived for each *** order to improve the performance of g.M-DBSCAN,we improved the g.neral g.netic alg.rithm by.performing.a g.netic operation in *** conducted extensive experiments on both real and sy.thetic datasets to show the effectiveness of g.M-DBSCAN than the brute-force *** experimental results show that g.M-DBSCAN outperforms the brute-force method by.up to 21 ***-DBSCAN with the index number binarization(INB)is 1.8 times faster than g.M-DBSCAN with the cluster number binarization(CNB).

关键词： Spatial clustering DBSCAN alg.rithm g.netic alg.rithm textual information