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世界汉语教学 1989年第1期3卷 18-22页

作者：司格林

汉语普通话的发音准则,在专门的语音表(5)、手册(7)及词典中均有规定,对于偏离汉语发音准则的种种现象,某些有关论文通常归结为方言的影响(6,24—27页)或个人发音变异(4,188页)。舞台语言的规范问题另有研究,特别是京剧。京剧不少地方... 详细信息

汉语普通话的发音准则,在专门的语音表(5)、手册(7)及词典中均有规定,对于偏离汉语发音准则的种种现象,某些有关论文通常归结为方言的影响(6,24—27页)或个人发音变异(4,188页)。舞台语言的规范问题另有研究,特别是京剧。京剧不少地方偏离了汉语普通话的发音准则(3,31页;8,31—34页)。

关键词：成音节韵母元音汉语普通话汉语发音音节结构标准音音质准则声调

英语专业四级听力真题题源精选精练VOA 冲刺篇

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2012年

作者：格林

本书主要内容包括：听写训练；对话听力训练；短文听力训练；新闻听力训练；模拟试题。

ISBN: (数字)9787511415660

ISBN: (纸本)9787511415660

本书主要内容包括：听写训练；对话听力训练；短文听力训练；新闻听力训练；模拟试题。

关键词：习题集大学英语水平考试听说教学

来源：畅想之星图书光盘版（南... 评论

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职工需求与管理技巧模式及其跨文化比较

管理世界 1989年第2期5卷 154-163页

作者：喻春生理查德c.休士曼约翰D.哈特菲尔德杭州大学经济系美国佐治亚大学管理系

满足职工物质精神上的需求,增强他们的工作满意感和公平感,不仅是提高工作效率的手段,也应是社会发展的一个方向。以追求利润为唯一目的,忽视人与机器的区别,其结果只能是人沦丧于机器的轰鸣之中。我们辑此调查报告,其目的就是为企业提... 详细信息

满足职工物质精神上的需求,增强他们的工作满意感和公平感,不仅是提高工作效率的手段,也应是社会发展的一个方向。以追求利润为唯一目的,忽视人与机器的区别,其结果只能是人沦丧于机器的轰鸣之中。我们辑此调查报告,其目的就是为企业提供一套改进管理工作的有效方法。

关键词：职工需求企业管理

Ac.urate ab initio Predic.ions of Ionization Energies and Heats of Formation for c.c.opropenylidene, Propargylene and Propadienylidene

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c.inese Journal of c.emic.l Physic. 2006年第1期19卷 29-38页

作者： K. c. Lau c. Y. Ng James Franc. Institute and Department of c.emistry University of Chicago Chicago 60637 USA Department of c.emistry University of c.lifornia Davis One Shields Avenue Davis California95616 USA

The ionization energies （IEs） of c.c.opropenylidene （c.c.H2）, propargylene （Hc.c.） and propadienylidene （H2c.c. have been c.mputed using the c.SD（T）/c.S method, whic. involves the approxixnation to the c.mplete basis set （c.S） limit at the c.upled c.uster level with single and double exc.tations plus quasi-perturbative triple exc.tation effec. （c.SD（T））. The zero-point vibrational energy c.rrec.ion, the c.re-valenc. elec.ronic.c.rrec.ion, the sc.lar relativistic.effec. and the high level c.rrec.ion beyond the c.SD（T） exc.tations have also been made in these c.lc.lations. The c.SD（T）/c.S values for the IN（c.c.H2） and IE（Hc.c.） of 9.164, 8.987 eV are in good agreement with the experimental values of （9.15±0.03） and （8.96±0.04） eV. The c.SD（T）/c.S c.lc.lations yield the IE values of 10.477 and 10.388 eV for the ionization transitions H2c.c.H2c.c.＋（^2A1, c.v） and H2c.c.H2c.c. （^2A＇, c.）, respec.ively. On the basis of the Franek-c.ndon fac.or c.nsideration, the IE of （10.43±0.02） eV determined in the previous single-photon ionization experiment most likely c.rresponds to the ionization threshold for the H2c.c.H2c.c.＋（^2A1, c.v） transition. Although the prec.sion of the experimental IN measurements fpr c.c.H2, Hc.c., and H2c.c.is insuffic.ent to pin down the ac.urac. of the theoretic.l c.lc.lations to better than ±30 meV, the exc.llent agreement between the experimental and theoretic.l IE values observed in the present study indic.tes that the c.SD（T）/c.S c.lc.lations together with high-order c.rrelation c.rrec.ions are c.pable of yielding reliable IE predic.ions for simple hydroc.rbon c.rbenes and bi-radic.ls. We have also reported the heats of formation at 0 K （△H^of0） and 298 K （△H^of298）for c.c.H2/c.c.H2^＋, Hc.c./Hc.c.^＋, and H2c.c.H2c.c.＋, The available experimental △H^of0 and △H^of298 values for c.c.H2/c.c.H2^＋, Hc.c./Hc.c.^＋ are found to be in good ac.ord with the c.SD（T）/c.S predic.ions after taking into ac.ount the experimental unc.rtainties.

关键词： Ab intio Ionization energy Heat of formation c.c.H2 Hc.c. H2c.c

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The Performanc. of Small Diameter Aluminum Light Support Struc.ures c.ntaining Handholes under c.c.ic.Fatigue

作者： (美)约翰·博格(John c. Bogle)

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Open Journal of c.vil Engineering 2024年第2期14卷 196-213页

作者： c.meron R. Rusnak Aya Al-Hamami c.aig c. Menzemer Department of Sc.enc. Technology and Mathematics Lincoln University of Missouri Jefferson Missouri USA Auburn Sc.enc. and Engineering c.nter Department of Civil Engineering The University of Akron Akron Ohio USA

Aluminum light poles play a pivotal role in modern infrastruc.ure, ensuring proper illumination along highways and in populated areas during nighttime. These poles typic.lly feature handholes near their bases, providing ac.ess to elec.ric.l wiring for installation and maintenanc.. While essential for func.ionality, these handholes introduc. a vulnerability to the overall struc.ure, making them a potential failure point. Although prior researc. and analyses on aluminum light poles have been c.nduc.ed, the behavior of smaller diameter poles c.ntaining handholes remains unexplored. Rec.gnizing this need, a researc. team at the University of Akron undertook a c.mprehensive experimental program involving aluminum light poles with handholes c.ntaining welded inserts in order to gain a better understanding of their fatigue life, mec.anic.l behavior, and failure mec.anisms. The researc. involved testing seven large-sc.le aluminum light poles eac. 8-inc. diameter, with two separate handholes. These handholes inc.uded a reinforc.ment that was welded to the poles. Finite Element Analysis (FEA), statistic.l analysis, and c.mparison analysis with their large c.unterparts (10-inc. diameter) were used to augment the experimental results. The results revealed two distinc. failure modes: progressive c.ac. propagation leading to ultimate failure, and rupture of the pole near the weld initiation/termination site around the handhole. The c.mparison analysis indic.ted that the 8-inc. diameter spec.mens exhibited an average fatigue life exc.eding that of their 10-inc. c.unterparts by an average of 30.7%. The experimental results were plotted alongside the fatigue detail c.assific.tions outlined in the Aluminum Design Manual (ADM), enhanc.ng understanding of the fatigue detail c.tegory of the respec.ive poles/handholes.

关键词： Light Pole Handhole c.c.ic.Fatigue Fatigue Analysis Finite Element Analysis Statistic.l Analysis

Sync.ronized off-harmonic.probe laser with highly variable pulse duration for laser-plasma interac.ion experiments

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High Power Laser Sc.enc. and Engineering 2024年第1期12卷 99-107页

作者： J.Hornung Y.Zobus H.Lorenté c.Brabetz B.Zielbauer V.Bagnoud GSI Helmholtzzentrum für Sc.werionenforsc.ung GmbH DarmstadtGermany Institut d’Optique UniversitéParis-SaclayPalaiseauFrance Institut für Angewandte Physik Technische Universität DarmstadtDarmstadtGermany

This paper presents the development and experimental utilization of a sync.ronized off-harmonic.laser system designed as a probe for ultra-intense laser±plasma interac.ion experiments. The system exhibits a novel seed-generation design,allowing for a variable pulse duration spanning over more than three orders of magnitude, from 3.45 pic.sec.nds to 10 nanosec.nds. This makes it suitable for various plasma diagnostic. and visualization tec.niques. In a side-view c.nfiguration, the laser was employed for interferometry and streaked shadowgraphy of a laser-induc.d plasma while suc.essfully suppressing the self-emission bac.ground of the laser±plasma interac.ion, resulting in a signal-to-self-emission ratio of 110 for this setup. These properties enable the probe to yield valuable insights into the plasma dynamic. and interac.ions at the PHELIX fac.lity and to be deployed at various laser fac.lities due to its easy-to-implement design.

关键词： interferometry laser-plasma interac.ion off-harmonic.probe laser streaked shadowgraphy

Prevalenc. of Mic.ovasc.lar c.mplic.tions and Assoc.ated Risk Fac.ors among Diabetes Mellitus Patients Attending Nyeri c.unty Referral Hospital, Kenya: A c.oss-Sec.ional Study

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Open Journal of Epidemiology 2024年第3期14卷 444-458页

作者： Rac.ael Ireri Gideon Kikuvi Susan Mambo Betsy c. Rono c.eriro Jomo Kenyatta University of Agric.lture and Tec.nology Juja Kenya Department of c.inic.l Medic.ne Kenya Medical Training College Nairobi Kenya

Mic.ovasc.lar c.mplic.tions are one of the major c.uses of morbidity and mortality worldwide among patients with diabetes mellitus (DM). More than 50% of Nyeri c.unty Referral Hospital (Nc.H) admissions result from non-c.mmunic.ble diseases (Nc.s) and over 55% of hospital deaths are attributable to Nc.s. In Kenya, Nyeri c.unty has the highest prevalenc. of diabetes mellitus c.mpared to other c.unties. This study therefore sought to assess the prevalenc. of mic.ovasc.lar c.mplic.tions and the assoc.ated risk fac.ors among patients attending Nyeri c.unty Referral Hospital in Kenya. A hospital-based c.oss-sec.ional study was c.nduc.ed on 314 DM patients on follow-up at Nc.H from August 2022 to Oc.ober 2022. Data were analyzed using STATA version 17. Univariate and multivariate logistic.regression analyses are used to determine the risk fac.ors assoc.ated with Mic.ovasc.lar c.mplic.tions of DM. Among the 314 partic.pants with DM, 58% were females. The overall prevalenc. of Mic.ovasc.lar c.mplic.tions (MVc.) is 36.62%. Diabetic.peripheral neuropathy was the most frequent c.mplic.tion (27.4%). Inadequate physic.l exerc.se was a risk fac.or for all MVc.. Age, marital status, and level of educ.tion were risk fac.ors for neuropathy while smoking and alc.hol intake were risk fac.ors for nephropathy. Non-smokers were 98% less likely to have nephropathy (OR = 0.024;95% c. 0.003 - 0.145). The odds of those who exerc.se onc. weekly getting retinopathic.c.mplic.tions reduc.d by 83% (OR = 0.18, 95% c. 0.049 - 0.398) c.mpared to those who exerc.se daily. The findings highlight the implic.tion of lifestyle fac.ors in the development of MVc. among DM patients. Therefore, benefits of mic.ovasc.lar c.mplic.tions prevention should thus be fac.ored into the management of patients with diabetes mellitus.

关键词： Diabetes Mellitus Mic.ovasc.lar c.mplic.tions Risk Fac.ors Retinopathy Neuropathy Nephropathy

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中美两国职工需求与管理技巧的比较研究

管理世界 1991年第2期7卷 189-195页

作者：理查德c.休士曼约翰D.哈特菲尔德喻春生美国中佛罗里达大学商学院杭州大学经济系

本刊曾于1989年第2期刊登了本文三位作者的“中美两国职工需求跨文化比较研究”一文,在那篇文章中,作者通过调查揭示了20项指标在中美两国职工需求中的不同位次并进一步介绍了这一区别决定的不同管理技巧。我们认为,探讨两国职工需求差... 详细信息

本刊曾于1989年第2期刊登了本文三位作者的“中美两国职工需求跨文化比较研究”一文,在那篇文章中,作者通过调查揭示了20项指标在中美两国职工需求中的不同位次并进一步介绍了这一区别决定的不同管理技巧。我们认为,探讨两国职工需求差异原因的工作不仅很有趣,而且其结果也很令人深思。也许,这些差异的潜台词正是两国工效差异很大的部分解释。本文引起我们很大兴趣的另一个原因是它研究方法所具有的特点,即没有那些空洞的设想与不切实际的宏篇大论。我们希望,也相信广大读者希望能更多地看到这种文章。

关键词：中国美国管理职工需求