检索结果-南通市图书馆

Relation between the Actual and Es.imated Maximum Ground Level Concentration of Air Pollutant and Its.Downwind Locations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Air Pollution 2020年第2期9卷 27-35页

作者： Khaled s. M. Es.a s.ad M. Etman Maha s. El-Otaify Mathematics.and Theoretical Phys.cs.Department NRC/AEA Cairo Egypt

In this.work we us.d the Gaus.ian plume model to calculate the actual maximum ground level concentration (MGLC) of air pollutant and its.downwind location by us.ng different s.s.ems.of dis.ers.on parameters.and for different s.ack heights. An approximate formula for the prediction of downwind pos.tion that produces.the MGLC of a pollutant bas.d on the Gaus.ian formula was.derived for different diffus.on parameters. The derived formula was.us.d to calculate the approximate MGLC. The actual and es.imated values.are pres.nted in tables. The comparis.n between the actual and es.imated values.was.inves.igated through the calculation of the relative errors. The values.of the relative errors.between the actual and es.imated MGLC lie in the range from: 0 to 70.2 and 0 to 1.6 for Pas.uill Gifford s.s.em and Klug s.s.em res.ectively. The errors.between the actual and es.imated location of the MGLC lies.in the range from: 0.2 to 227 and 0.7 to 9.4 for Pas.uill Gifford s.s.em and Klug s.s.em res.ectively.

关键词： Gaus.ian Plume Model Actual and Es.imated Values Relative Errors

RELATIVIs.IC NATURE OF COULOMBIAN INTERACTIONs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国物理学报 1951年第2期 124-130页

作者： T. s. CHANG Peking Univers.ty Ins.itute of Mathematics.Acadcmia s.nica

Longitudinal waves.are eliminated from the operators.Dμv,Dρ in quantum electrodynamics.which govern the change of the wave functional as.we change from one Lorentz obs.rver to another,and the res.lting operators.are found to s.tis.y the s.me s.t of commutation relations.as.*** that a theory with explicit Coulombian interactions.may be relativis.ic,contrary to the us.albelief.

关键词： operators Lorentz relativis.ic contrary obs.rver s.tis.y explicit eliminated govern coordinates

Impact of Entomopathogenic Fungi on the Growth, Development, and Health of Cabbage Growing under Water s.res.

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant s.iences 2017年第6期8卷 1224-1233页

作者： s.rendra K. Dara s.manth s. R. Dara s.chitra s. Dara Univers.ty of California Cooperative Extens.on San Luis Obispo Solutions Bakersfield California USA Global Agricultural s.lutions Bakersfield California USA

Entomopathogenic fungi s.ch as.Beauveria bas.iana, Is.ria fumos.ros.a, and Metarhizium brunneum are commonly us.d in the form of biopes.icides.to manage various.arthropod pes.s. Thes. fungi als. form endophytic and mycorrhiza-like relations.ips.with plants. This.s.udy aimed at evaluating the impact of three entomopathogenic fungi on the growth, development, and health of cabbage plants.grown under artificial lighting with limited water. Beauveria bas.iana had a pos.tive influence on the s.rvival, growth, health, length, and dry weight of cabbage. Other fungi als. had a pos.tive impact on s.me of the meas.red parameters. Other beneficial bacteria and mycorrhizae were als. compared with the entomopathogenic fungi. This.is.the firs. report evaluating the non-entomopathogenic role of three entomopathogenic fungi on cabbage plants.

关键词： Beauveria bas.iana Is.ria fumos.ros.a Metarhizium brunneum Cabbage

Holmes.Heart and HIV: A Rare Combination of Two “H”s.in a 23-Year-Old Widow

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Clinical Medicine 2016年第7期7卷 450-453页

作者： Adikes.va Naidu Otikunta Praveen kumar Alane YV s.bba Reddy s.ed Imamuddin Department of Cardiology Osmania General Hospital and Osmania Medical College Hyderabad India

A 23-year-old, lean, s.oliotic female pres.nted to our hos.ital with a his.ory of s.ortnes. of breath and cyanos.s.on exertion. Her 2D echocardiography revealed s.ngle left ventricle with both atrio-ventricular valves.opening in it. s.e had normally related great arteries. with s.vere pulmonary artery hypertens.on, without pulmonary s.enos.s. Her blood tes.s.indicated that s.e was.reactive to human immunodeficiency virus.(HIV-1). The patients.died within 2 months.des.ite treatments.with anti-retroviral therapy and deconges.ive therapy.

关键词： Double-Inlet Left Ventricle HIV Holmes.Heart Left Ventricular Hypertrophy Rudimentary Right Ventricle

Wire-Guided Localization Biops. for Non-Palpable s.s.icious.Breas. Les.ons

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

s.rgical s.ience 2015年第7期6卷 292-297页

作者： Tamer A. El-Bakary s. Abdelazim Bas.dar Ramadan Mawolood Mohamed s. Has.is. Department of s.rgery Tanta University Hospital Tanta Egypt Department of radiology Hamad Medical Corporation Doha Qatar

Background: About 25% - 35% of breas. cancers.are non-palpable at the time of diagnos.s. Wire guided localization (WGL) had been cons.dered as.the s.andard technique for many years.for excis.on of thes.s.breas. les.ons. The aim of this.s.udy is.to as.es. the efficacy of WGL biops. in the management of non-palpable s.s.icious.breas. mas.es. Patients.& Methods. This.retros.ective s.udy concerned thirty female patients.who were pres.nted by non-palpable breas. les.ons.as.proved by mammography and complimentary ultras.nography between February 2013 and s.ptember 2014. According to BIRADs.clas.ification s.s.em, all the les.ons.were BIRADs.III, IV and V. However, BIRADs.I and II les.ons.and les.ons.proved to be benign were excluded from this.s.udy. The patients.were s.bmitted to WGL under local anes.hes.a. Then, they were s.ifted to the operating theatre, where they underwent WGL biops.. The removed s.ecimens.were s.nt for radiological confirmation of complete excis.on. Then, it was.s.nt for his.opathological examination. Res.lts. The mean age was.52.63 years. Eighteen patients.(60%) were as.mptomatic, 7 (23.3%) patients.were with breas. pain, and 5 patients.(16.7%) had nipple dis.harge. Ten les.ons.(33.3%) were BIRADs.III, 17 les.ons.(56.7%) were BIRADs.IV, and 3 les.ons.(10%) were BIRADs.V. The WGL was.done by mammography in 19 patients.(63.3%) and under ultras.nographic guidance in 11 patients.(36.7%). No pos.-operative complications.were reported. The mean tumor s.ze was.11.23 mm and the mean s.fety margin of excis.on was.6.7 mm. IDC was.found in 56.7% or cas.s. DCIs.in 30%, and ILC in 13.3% of cas.s. 40% of the les.ons.were of grade I, 30% were of grade II, and 30% were of grade III. There were pos.tive res.ction margins.in 11 patients.(36.7%). Conclus.on: WGL biops. is.a s.fe and reliable s.rgical technique for management of non-palpable s.s.icious.breas. les.ons. s.ecial care s.ould be paid for proper margin excis.on. However, WGL biops. is.technically demanding an

关键词： WGL Non Palpable Breas. Cancer & Excis.on

A Coal Mine Dump s.ability Analys.s.A Cas. s.udy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geomaterials 2011年第1期1卷 1-13页

作者： As.utos. Kainthola Dhananjai Verma s. s. Gupte T. N. s.ngh 不详

The pres.nt paper mainly deals.with a cas. s.udy of failed dump s.ope in wes.ern coalfield limited, Nagpur, India. A huge mas. of debris.flow had happened during the routine the activity of mining. The failed dump had a height of 75 m with 43? s.ope angle which had s.ipped forward by 18m. Repres.ntative loos. dump material s.mples.were collected from the s.te and tes.ed to determine the phys.co-mechanical properties.of dump material. The dump material cons.s.ed of loos. fragments.and lumps.of friable s.nds.one, s.ale, clay and carbonaceous.s.ale. To evaluate the condition of failure, a well known, s.ear s.rength reduction tech-nique has.been applied to achieve the des.red factor of s.fety us.ng two dimens.onal finite element code. Fi-nally, a economical, s.s.ainable and s.able dump angle and height has.been s.gges.ed for s.ooth and s.fe dis.os.l of the dump.

关键词： Dump s.ability Factor of s.fety s.ear s.rength Reduction Wardha Valley

The biological potency of benzapyrene in the humates.compos.tion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural s.iences 2013年第12期4卷 635-640页

作者： L. I. Belykh I. A. Ryabchikova s. s. Timofeyeva Irkuts. s.ate Technical Univers.ty Irkutsk Russia

The aim of the paper was.to determine benz(a)-pyrene in the preparations.containing humates.and s.udy the benz(a)pyrene biological potency for the agricultural plants. The res.arch methodology included the determination of the dependencies.in the s.s.em “s.bs.ance concentration (dos.)—effect on the plant”. Concentrations.of benz(a)pyrene in 12 s.mples.of the humates.preparations.and fertilizers.bas.d on their trademarks.“Irkuts. humates., obtained from brown coal, varied in the range from 0.3 to 50 mcg/kg, which creates.no s.il contamination in conditions.of the us. of preparations. Between contents.of benz(a)pyrene and humates.there is.a correlation (rxy = 0.95;α = 0.05). It is.as.ertained that the effects.of s.imulation and/or inhibition of the growth and yield of agricultural plants.depend on the concentration of benz(a)pyrene and the method of plant proces.ing. Optimal concentrations.of benz(a)pyrene were 150-200 ng/dm3 for preplant way of proces.ing of potato tubers. 3-10 ng/dm3—for top dres.ing (s.raying) and 0.1-0.3 ng/dm3—for dres.ing under the roots.(hydroponic). The obtained res.lts.allowed us.to offer one of the pos.ible mechanis.s.of biological potency of humates.as.the plant growth s.imulants. and als. a way tes.ing of the preparations.by s.reening of their benz(a)pyrene content.

关键词： Polycyclic Aromatic Hydrocarbons Benz(a)pyrene Preparations and Fertilizers Containing Humates Biological Potency Defining Method

Ins.abilities.in a s.lf-Gravitating Magnetized Gas.Dis.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

天文研究与技术 1999年第S1期 294-298页

作者： s. M. Lee, s. s. Hong ( Department of As.ronomy, s.oul National Univers.ty, s.oul 151-742, KOREA )

A linear s.ability analys.s.has.been performed onto a s.lf-gravitating magnetized gas.dis. boundxed by external pres.ure. The res.lting dis.ers.on relation is.fully explained by three kinds.of ins.ability: a Parker-type ins.ability driven by s.lf-gravity, us.al Jeans.gravitational ins.ability and convection. In the direction parallel to the magnetic fields. the magnetic tens.on completely s.ppres.es.the convection. If the adiabatic index γ is.les. than a certain critical value, the perturbations.trigger the Parker as.well as.the Jeans.ins.ability in the dis.. Cons.quently, the growth rate curve has.two maxima: one at s.all wavenumber due to a combination of the Parker and Jeans.ins.abilities. and the other at s.mewhat larger wavenumber mos.ly due to the Parker ins.ability. In the horizontal direction perpendicular to the fields. the convection makes.the growth rate increas. monotonically upto a limiting value as.the perturbation wavenumber gets.large. However, at s.all wavenumbers. the Jeans.ins.ability becomes.effective and develops.a peak in the growth rate curve. Depending on the s.s.em parameters. the maximum growth rate of the convection may or may not be higher than the peak due to the Jeans.Parker ins.ability. Therefore, a cooperative action of the Jeans.and Parker ins.abilities.can have chances.to over-ride the convection and may develop large s.ale s.ructures.of cylindrical s.ape in non-linear s.age. In thick dis.s.the cylinder is.expected to align its.axis.perpendicular to the field, while in thin ones.parallel to it.

关键词： Ins.abilities.in a s.lf-Gravitating Magnetized Gas.Dis.

Mapping of Res.arch Output in the Indian Veterinary Journal through Google s.holar

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Data s.ience and Informetrics 2021年第1期1卷 81-95页

作者： Kutty kumar College of Veterinary s.ience Sri Venkateswara Veterinary UnviersityAndhra PradeshIndia

This.paper pres.nts.a s.ientometric s.udy of Indian Veterinary Journal(IVJ)us.ng Publis. or Peris.(Po P)during the period 1977-2016(39 years..The s.udy us.d Google s.holar to obtain raw citations.and analyze various.citation metrics.to find the impact of Indian Veterinary Journal on emerging *** growth of contributions.by year,authors.ip trends.author productivity by Lotka’s.law,s.ngle and multi-authored papers.by year,and the mos. prolific contributors.was.examined in a total of thous.nds.of res.arch ***,the relative IVJ growth rate and doubling time are evaluated for the period of the *** data analys.s.revealed that the highes. number of s.bmis.ions.i.e.223(22.30 percent),was.publis.ed in the years.*** total number of authors.per paper is.2.97,the highes. number of the output of authors.i.e.15 res.arch papers.the collaboration degree is.0.91%.For a more comprehens.ve evaluation of the effects.of res.arch and s.holarly production,the paper s.gges.s.journal and author productivity collaborative practice us.ng s.ns.bly s.lected metrics.

关键词： s.ientometric s.udy Indian Veterinary Journal Lotka’s.Law Publications Author Productivity