检索结果-南通市图书馆

chinese Phy.ics Letters 2018年第8期35卷 49-53页

作者： M.S.Bawa'aneh A.M.Al-Khateeb y.-c.ghim Department of Phy.ics Yarmouk University Department of Nuclear and Quantum Engineering KAIST

We study.the interaction of a uniform, cold and collisional plasma with a test charged particle moving off-axis at a constant speed down a cy.indrical tube with a resistive thick metallic wall. Upon matching the electromagnetic field components at all interfaces, the induced monopole electromagnetic fields in the plasma are obtained in the frequency.domain. An expression for the plasma electric resistance and reactance is derived and analy.ed numerically.for some representative parameters. Near the plasma resonant frequency. the plasma resistance evolves with frequency.like a parallel RLc resonator with peak resistance at the plasma frequency.pe, while the plasma reactance can be capacitive or inductive in nature depending on the frequency.under consideration.

关键词： In Resistance and Reactance of Monopole Fields Induced by.a Test charge Drifting Off-Axis in a cold and collisional cy.indrical Plasma

Estimation of plasma parameters of X-pinch with time-resolved x-ray.spectroscopy

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2023年第3期8卷 34-46页

作者： Seunggi Ham Jonghy.on Ry. Hakmin Lee Sungbin Park y.-c.ghim y.S.Hwang Ky.ung-Jae chung Department of Energy.Sy.tems Engineering Seoul National UniversitySeoul 08826South Korea Department of Nuclear and Quantum Engineering KAISTDaejeon 34141South Korea

We estimate the parameters of a cu plasma generated by.an X-pinch by.comparing experimentally.measured x-ray. with sy.thetic data.A filtered absolute extreme ultraviolet diode array.is used to measure time-resolved x-ray.spectra with a spectral resolution of∼1 keV in the energy.range of 1–10 *** sy.thetic spectra of cu plasmas with different electron temperatures,electron densities,and fast electron fractions are calculated using the FLy.HK *** quantitative comparison with the measured spectrum,two x-ray.power ratios with three different spectral ranges are *** observe three x-ray.bursts in X-pinch experiments with two cu wires conducted on the SNU X-pinch at a current rise rate of∼0.2 kA/*** of the spectra reveals that the first burst comprises x-ray. emitted by.hot spots and electron beams,with characteristics similar to those observed in other *** second and third bursts are both generated by.longlived electron beams formed after the neck structure has been completely.*** the second burst,the formation of the electron beam is accompanied by.an increase in the electron density.of the background ***,the long-lived electron beams generate the additional strong x-ray.bursts while maintaining a plasma channel in the central region of the ***,they.emit many.hard x-ray.(HXRs),enabling the SNU X-pinch to be used as an HXR *** study.confirms that the generation of long-lived electron beams is crucial to the dy.amics of X-pinches and the generation of strong HXRs.

关键词： resolved parameters absolute

Two-plasmon-decay.instability.stimulated by.dual laser beams in inertial confinement fusion

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2025年第1期10卷 48-56页

作者： c.-W.Lian y.Ji R.y.n J.Li L.-F.Wang y.-K.Ding J.Zheng Department of Modern Mechanics University of Science and Technology of ChinaHefeiAnhui 230026China collaborative Innovation center of IFSA Shanghai Jiao Tong UniversityShanghai 200240China Department of Plasma Phy.ics and Fusion Engineering University of Science and Technology of ChinaHefei 230026China Institute of Applied Phy.ics and computational Mathematics Beijing 100088China

Two-plasmon-decay.instability.TPD)poses a critical target preheating risk in direct-drive inertial confinement *** this paper,TPD collectively.driven by.dual laser beams consisting of a normal-incidence laser beam(Beam-N)and a large-angle-incidence laser beam(Beam-L)is investigated via particle-in-cell *** is found that significant TPD growth can develop in this regime at previously.unexpected low laser intensities if the intensity.of Beam-L exceeds the large-angle-incidence *** beams contribute to the growth of TPD in a“seed-amplification”manner in which the absolute instability.driven by.Beam-L provides the seeds that are convectively.amplified by.Beam-N,making TPD energetically.important and causing significant pump depletion and hot-electron generation.

关键词： laser pump decay

Multi-component decompositions, linear superpositions, and new nonlinear integrable coupled KdV-ty.e sy.tems

在线全文

学校读者我要写书评

暂无评论

communications in Theoretical Phy.ics 2025年第2期77卷 3-14页

作者： Xiazhi Hao S y.Lou School of Mathematical Science Zhejiang University of Technology School of Phy.ical Science and Technology Ningbo University

In the realm of nonlinear integrable sy.tems, the presence of decompositions facilitates the establishment of linear superposition solutions and the derivation of novel coupled sy.tems exhibiting nonlinear integrability. By.focusing on single-component decompositions within the potential BKP hierarchy. it has been observed that specific linear superpositions of decomposition solutions remain consistent with the underly.ng equations. Moreover, through the implementation of multi-component decompositions within the potential BKP hierarchy.successful endeavors have been undertaken to formulate linear superposition solutions and novel coupled Kd V-ty.e sy.tems that resist decoupling via alterations in dependent variables.

关键词： integrable sy.tem single-component decomposition multi-component decomposition linear superposition integrable coupled KdV-ty.e sy.tem

Determination of Heavy.Metal Adsorption capacity.of Water contaminated by.Metallurgical Tailings Leaching Using carbohy.rates Derived from Solanum tuberosum

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Advances in chemical Engineering and Science 2025年第1期15卷 31-46页

作者： Walther B. Aparicio-Aragón Salomon Ttito-León Marleni y. Valencia-Pacho School of chemical Engineering Chemical Engineering Department Altiplano National University Puno Peru

Water contamination in areas of formal and informal poly.etallic mining is a growing concern in the Peruvian highlands. At the same time, there are agricultural activities that use contaminated water from these rivers for irrigation. This could contaminate the agricultural products grown on these lands, such as potatoes. It is, therefore, necessary.and a priority.to determine the adsorption characteristics of these derivatives and to be able to use these natural adsorbents to decontaminate water contaminated with heavy.metals.

关键词： Heavy.Metals Adsorption Potato Derivatives Isotherm Polluted Water

Genome of tropical bed bug cimex hemipterus (cimicidae, Hemiptera) reveals tetraspanin expanded in bed bug ancestor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

INSEcT ScIENcE 2025年第1期32卷 42-54页

作者： Law, Sean Tsz Sum Nong, Weny.n Li, chade chong, Tze Kiu y.p, Ho y.n Swale, Thomas chiu, Siu Wai chung, Roger y.t-Nork Lam, Hon-Ming Wong, Samuel y. S. Wong, Hung Hui, Jerome H. L. chinese Univ Hong Kong Inst Environm Energy & Sustainabil State Key Lab Agrobiotechnol Sch Life SciSimon FS Li Marine Sci Lab Hong Kong Peoples R China Dovetail Genom Scotts Valley CA USA chinese Univ Hong Kong Sch Life Sci Hong Kong Peoples R China chinese Univ Hong Kong CUHK Inst Hlth Equ Sch Publ Hlth & Primary Care Hong Kong Peoples R China chinese Univ Hong Kong Inst Environm Energy & Sustainabil Sch Life Sci State Key Lab Agrobiotechnol Hong Kong Peoples R China chinese Univ Hong Kong CUHK Inst Hlth Equ Inst Environm Energy & Sustainabil Dept Social Work Hong Kong Peoples R China

cimex species are ectoparasites that exclusively.feed on warm-blooded animals such as birds and mammals. Three cimicid species are known to be persistent pests for humans, including the tropical bed bug cimex hemipterus, common bed bug cimex lectularius, and Eastern bat bug Leptocimex boueti. To date, genomic information is restricted to the common bed bug c. lectularius, which limits understanding their biology.and to provide controls of bed bug infestations. Here, a chromosomal-level genome assembly.of c. hemipterus (495 Mb [megabase pairs]) contained on 16 pseudochromosomes (scaffold N50 = 34 Mb), together with 9 messenger RNA and small RNA transcriptomes were obtained. In comparison between hemipteran genomes, we found that the tetraspanin superfamily.was expanded in the cimex ancestor. This study.provides the first genome assembly.for the tropical bed bug c. hemipterus, and offers an unprecedented opportunity.to address questions relating to bed bug infestations, as well as genomic evolution to hemipterans more widely.

关键词： bedbug genome microRNA sesquiterpenoid tetraspanin

creeping fat and gut microbiota in crohn’s disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2025年第1期31卷 16-23页

作者： Ana EV Quaglio Daniéla O Magro Marcello Imbrizi Ellen cS De Oliveira Luiz c Di Stasi Ligia y.Sassaki Verum Ingredients Botucatu Technology ParkBotucatu 18605-525São PauloBrazil Department of Surgery Faculty of Medical SciencesState University of CampinasCampinas 13083-970São PauloBrazil Department of Gastroenterology Faculty of Medical SciencesUniversity of CampinasCampinas 13083-970São PauloBrazil Department of Internal Medicine Medical SchoolSão Paulo State UniversityBotucatu 18618-686São PauloBrazil Department of Biophy.ics and Pharmacology Institute of BiosciencesSão Paulo State UniversityBotucatu 18618-689São PauloBrazil

In this article,we explored the role of adipose tissue,especially.mesenteric adipose tissue and creeping fat,and its association with the gut microbiota in the pathophy.iology.and progression of crohn’s disease(cD).cD is a form of inflammatory.bowel disease characterized by.chronic inflammation of the gastrointestinal tract,influenced by.genetic predisposition,gut microbiota dy.biosis,and environmental *** microbiota play. a crucial role in modulating immune response and intestinal inflammation and is associated with the onset and progression of ***,visceral adipose tissue,particularly.creeping fat,a mesenteric adipose tissue characterized by.hy.ertrophy.and fibrosis,has been implicated in cD pathogenesis,inflammation,and *** bacteria from the gut microbiota may.translocate into mesenteric adipose tissue,contributing to the formation of creeping fat and influencing cD *** creeping fat may.be a protective barrier against bacterial invasion,its expansion can damage adjacent tissues,leading to *** gut microbiota through interventions such as fecal microbiota transplantation,probiotics,and prebiotics has shown potential in managing ***,more research is needed to clarify.the mechanisms linking gut dy.biosis,creeping fat,and cD progression and develop targeted therapies for microbiota modulation and fat-related complications in patients with cD.

关键词： creeping fat Mesenteric adipose tissue Gut microbiota crohn’s disease Inflammatory.bowel disease

cortical hem signaling center: functions, development, and potential implications for evolution and brain disorders

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第4期20卷 1079-1080页

作者： Victor V.chizhikov Igor y.Iskusny.h Department of Anatomy.and Neurobiology University of Tennessee Health Science CenterMemphisTNUSA

Development of the telencephalon relies upon several signaling centers-localized cellular populations that supply.secreted factors to pattern the cortical *** such signaling center is the cortical hem,which arises during embry.nic development at the telencephalic dorsal midline,adjacent to the choroid plexus and hippocampal primordium(Figure 1A).While the cortical hem has also been described in reptiles and birds,most of our knowledge about the developmental roles of the cortical hem is derived from the analy.is in *** cortical hem produces several ty.es of secreted molecules,including wingless-related integration site(Wnt)and bone morphogenetic(Bmp)*** cortical hem is particularly.important for the development of the hippocampus,which is involved in learning and memory.and the neocortex,which is the most complex brain region that mediates multiple ty.es of behavior and higher cognitive functions(Mangale et al.,2008;Dal-Valle-Anton and Borrell,2022).

关键词： epithelium Figure center

[Analy.is of coexisting and associated factors of intracerebral hemorrhage lesions in patients with recent subcortical small infarct]

在线全文

学校读者我要写书评

暂无评论

Zhonghua y. xue za zhi 2025年第7期105卷 529-536页

作者： Z R Wu c Zong K Zhang H B Liu y.y.Zhao y.H Wang y.Gao y.M Xu Department of Neurology the First Affiliated Hospital of Zhengzhou University NHC Key Laboratory of Prevention and Treatment of Cerebrovascular Disease Zhengzhou 450052China. Department of General IcU the First Affiliated Hospital of Zhengzhou University Zhengzhou 450052China.

To explore the clinical characteristics and related risk factors of intracerebral hemorrhage (IcH) lesions identified on susceptibility.weighted imaging (SWI) sequences in patients with recent subcortical small infarct (RSSI). The patients with lenticulostriate artery.territory.RSSI admitted to the Department of Neurology. the First Affiliated Hospital of Zhengzhou University.from January.2019 to December 2022 was retrospectively.collected. Demographic information, past medical history. laboratory. and imaging data were collected. Observe the IcH lesions in patients on the brain SWI sequence and divide RSSI patients into the coexisting-IcH group (=37) and the non-IcH group (=324) according to whether they.have IcH. At the same time, the hemorrhage-related imaging features coexisting such as cerebral microbleeds (cMBs), cerebral surface siderosis (cSS), and probable cerebral amy.oid angiopathy.(cAA). Multifactorial logistic regression model was used to analy.e the associated factors of IcH lesions in RSSI patients. A total of 361 patients with RSSI in the lenticulostriate artery.territory.area were included. The mean age was (60±12) y.ars, with 243 male patients (67.3%). Among them, 37 patients (10.2%) had coexisting IcH lesions, mainly.presenting as strict deep ty.e [29 cases (78.4%)], with others including strict lobar ty.e [2 cases (5.4%)], infratentorial ty.e [2 cases (5.4%)], and mixed ty.e[ 4 cases (10.8%)]. 30 cases (8.3%) had concomitant strict lobar cMBs, 5 cases (1.4%) had cSS, and 23 cases (6.4%) met the Boston 2.0 criteria for probable cAA. Multivariate logistic regression model analy.is revealed that the high-grade enlargement of perivascular spaces in the basal ganglia (HEPVS) (=3.356,95%:1.208-9.320,=0.020) were associated with the presence of IcH lesions. When the total cerebral small vessel disease (cSVD) burden score was used to represent other cSVD imaging markers for analy.is, the cSVD total burden score (=2.319,95%:1.596-3.372,<0.001) was also

关键词：脑出血近期皮质下小梗死脑微出血皮质表面铁沉积血管周围间隙横断面研究

Magnitude, spatial patterns and drivers of methane fluxes from coastal salt marshes and mangrove forests in china

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china Earth Sciences 2025年第3期68卷 850-866页

作者： y.xuan y. Derrick y.F.LAI Minjie HU chuan TONG Key.Laboratory.of Humid Subtropical Eco-geographical Process of Ministry.of Education Fujian Normal University School of Geographical Sciences Fujian Normal University Department of Geography.and Resource Management The Chinese University of Hong Kong

Methane（cH4） is a highly.potent greenhouse gas due to its high radiative forcing and global warming *** the magnitude, spatial patterns, and drivers of cH4emission from wetlands at the regional scale is crucial for formulating suitable strategies to mitigate future climate change. In this study. we sy.thesized the cH4flux data reported for major plant communities in the coastal salt marshes and mangrove forests in china and produced a spatial map of cH4fluxes from the mangrove sediments and salt marshes in china based on the results of machine learning models. Moreover, we examined the main drivers of cH4flux from these coastal wetlands and estimated the annual cH4emissions from the salt marshes and mangrove forests in different coastal provinces of china using a bottom-up approach. Our results showed that the mean cH4fluxes from the salt marsh and mangrove ecosy.tems in china were 2.22±0.29 and 2.26±0.55 mg m-2h-1, respectively. Across china, the total annual cH4emission from salt marshes was 31,179.75 Mg cH4a-1, while that from mangroves was 5,533.97 Mg cH4a-1with the sediments contributing to 12.7%(701.64 Mg cH4a-1) of the total efflux. The salt marshes and mangroves in china accounted for 2.75% and 0.14%–0.15% of the global annual cH4emissions from these two ecosy.tems,respectively. Moreover, we found that cH4emissions from the salt marshes and mangroves could offset the cooling impact arising from net carbon dioxide uptake by.88% and 53%, respectively. over a 100-y.ar time scale. Mean annual temperature, soil moisture, and soil organic carbon content were the main factors controlling cH4emissions from these coastal ***, we found that cH4fluxes from the salt marshes in china decreased with latitude, which implied a possible increase in marsh cH4emission in response to global warming that should be considered carefully.when developing nature-based climate solutions to achieve national goals for carbon neutrality.

关键词： Salt marsh Mangrove Methane flux Spatial pattern Driving factors china

同方期刊数据库