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1.
案例教学是符合现代成人教育的一种教学方法,学员可以通过对案例文本研究和案例问题的交流讨论,来提高对实际问题的分析和解决能力。以陕西气象为农服务案例为例,介绍陕西省气象干部培训学院在案例教学中取得的一些经验,分析存在的不足,探讨改进措施,为气象培训同行提供参考。 相似文献
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在气象干部综合素质培训中尝试开展访谈式教学,能更好地激发学员的热情和参与度,提升教学效果。通过对陕西省气象干部培训学院开展的访谈式教学实践的分析,提出了做好访谈式教学应把握课程设计、课堂实施等关键环节及应该注意的问题。 相似文献
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案例教学是一种可以充分体现学员为主体的教学方式.案例情境的引入不仅可以高度激发学员的学习兴趣,也可使学员在教师的引导下,逐步理解并运用所学知识对案例进行剖析与探究,从而加深学员对教学内容的理解.文章通过分析案例教学在内蒙古气象部门职工培训中的应用情况,探讨案例教学在气象培训中的教学效果、影响因素及发挥的作用,就进一步提... 相似文献
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通过对气象综合素质培训班学员的交流讨论情况及培训结束后提交的心得体会的分析,探究此项培训的有效价值,明晰此项培训是能够提高广西气象"干部思想政治素质、科学文化素养、业务素质和健康素质",从而推动气象综合素质培训常态化。 相似文献
8.
提升陕西气象培训能力的思考 总被引:1,自引:0,他引:1
通过调研和调查相结合的方法,总结中国气象局气象干部培训学院培训分中心(以下简称分中心)发展的先进经验,调查全省气象职工的培训需求,指出目前陕西气象培训能力提升的迫切任务。 相似文献
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气象教育改革必须适应气象事业的新型结构谢勇华近十年来,在气象院校中,先后停止了大学专科生的招生和培养.代之以干部专修科和专科函授生的培训。这虽然对于提高气象邵门在职职工的整体素质起到了一定作用,但是由于气象事业新型结构的建立、业务技术体制的改革以及在... 相似文献
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The kinetics of the aqueous phase reactions of NO3 radicals with HCOOH/HCOO– and CH3COOH/CH3COO– have been investigated using a laser photolysis/long-path laser absorption technique. NO3 was produced via excimer laser photolysis of peroxodisulfate anions (S2O
8
2–
) at 351 nm followed by the reactions of sulfate radicals (SO
4
–
) with excess nitrate. The time-resolved detection of NO3 was achieved by long-path laser absorption at 632.8 nm. For the reactions of NO3 with formic acid (1) and formate (2) rate coefficients ofk
1=(3.3±1.0)×105 l mol–1 s–1 andk
2=(5.0±0.4)×107 l mol–1 s–1 were found atT=298 K andI=0.19 mol/l. The following Arrhenius expressions were derived:k
1(T)=(3.4±0.3)×1010 exp[–(3400±600)/T] l mol–1 s–1 andk
2(T)=(8.2±0.8)×1010 exp[–(2200±700)/T] l mol–1 s–1. The rate coefficients for the reactions of NO3 with acetic acid (3) and acetate (4) atT=298 K andI=0.19 mol/l were determined as:k
3=(1.3±0.3)×104 l mol–1 s–1 andk
4=(2.3±0.4)×106 l mol–1 s–1. The temperature dependences for these reactions are described by:k
3(T)=(4.9±0.5)×109 exp[–(3800±700)/T] l mol–1 s–1 andk
4(T)=(1.0±0.2)×1012 exp[–(3800±1200)/T] l mol–1 s–1. The differences in reactivity of the anions HCOO– and CH3COO– compared to their corresponding acids HCOOH and CH3COOH are explained by the higher reactivity of NO3 in charge transfer processes compared to H atom abstraction. From a comparison of NO3 reactions with various droplets constituents it is concluded that the reaction of NO3 with HCOO– may present a dominant loss reaction of NO3 in atmospheric droplets. 相似文献
14.
K. Zeller 《Meteorology and Atmospheric Physics》1950,2(4):401-403
Zusammenfassung A. undE. Vassy haben in der Frage der Temperatur-abhängigkeit des Ozongehalts der Atmosphäre aus der Gleichung loge
n
–logJ
n
logK(T
n
) geschlossen, daß auch die Gleichung loge
n
logJ
n
+logK(T
n
) gültig sei. Es wird hier nun gezeigt, daß die bei der ersten Gleichung erlaubten Vernachlässigungen bei der zweiten zu großen Fehlern führen können und daß daher von A. undE. Vassy kein Beweis für die Richtigkeit der Beziehunge=J.K(T) erbracht ist.
Summary In the question of temperature dependence of ozone content of the atmosphere A. andE. Vassy have concluded from the equation loge n –logJ n logK(T n ) that also the formula loge n logJ n +logK(T n ) must be valid. In this paper it is proved that the neglections which may be admitted for the first equation, can conduct to great errors. Therefore A. andE. Vassy have not produced a proof for the correctness of the equatione=J.K(T).
Résumé A. etE. Vassy en étuidant le problème de la teneur de l'ozone atmosphérique en relation avec la température ont admis que l'équation loge n –logJ n logK(T n ) entraînait aussi la relation loge n logJ n +logK(T n ). On montre ici que les simplifications admises pour la première équation conduisent pour l'application de la seconde à de fortes erreurs, et que par conséquent ces auteurs n'ont pas fourni de preuve de la justesse de la relatione=J.K(T).相似文献
15.
Precipitation samples were collected by filtrating bulk sampler in Kitakyushu City, Japan, from January 1988 to December 1990. Volume weighted annual mean of pH was 4.93, but the pH distribution indicated that most probable value lay in the range pH 6.0–6.4. Volume weighted annual mean concentrations of major ionic components were as follows; SO
4
2–
: 84.2, NO
3
–
: 28.1, Cl–: 86.3, NH
4
+
: 45.5, Ca2+: 63.3, Mg2+: 27.0, K+: 3.4, Na+: 69.0 µ eq l–1. The highest concentrations of these ionic components were observed in winter and the lowest occurred in the rainy season. The ratio of ex-SO
4
2–
/NO
3
–
exhibited the lowest ratio in summer, and the highest ratio in winter. Good correlations were obtained between Cl– and Na+, ex-SO
4
2+
and ex-Ca2+, NO
3
–
and ex-Ca2+, and NH
4
+
and ex-SO
4
2–
, respectively. However, no correlation between Cl– and Na+ with Ca2+ was observed. The relationship of H+ with (ex-SO
4
2–
+ NO
3
–
) - (ex-Ca2+ + NH
4
+
) indicated positive correlation. 相似文献
16.
Summary ?Above orographically structured terrain considerable differences of the regional wind field may be identified during large-scale
extreme wind events. So far, these regional differences could not be resolved by climate models. To determine the relationships
between large-scale atmospheric conditions, the influence of orography, and the regional wind field, data measured in the
upper Rhine valley within the framework of the REKLIP Regional Climate Project were analyzed and calculations were made using
the KAMM mesoscale model. In the area of the upper Rhine valley, ratios of the wind velocity in the Rhine valley at 10 m above
ground level, νval, and the large-scale flow velocity, νlar, are between νval/νlar ≈ 0.1 and νval/νlar ≈ 1. The νval/νlar ratio exhibits a strong dependence on thermal stratification, δ, and decreases from νval/νlar ≈ 1 at δ = 0 K m−1 to νval/νlar ≈ 0.2 at δ = 0.0075 K m−1. In areas, where the lateral mountainous border of the Rhine valley is interrupted, the νval/νlar ratio increases again with increasing stability or decreasing Froude number. This is obviously due to flow around the Black
Forest under stable stratification. It is demonstrated by model calculations that a complex wind field develops in the Rhine
valley at small Froude numbers (Fr < 1) irrespective of the direction of large-scale flow. The νval/νlar ratio is characterized by small values in the direct lee side (νval/νlar ≈ 0.2) and high values on the windward side of the lateral mountainous border of the Rhine valley (νval/νlar ≈ 0.8).
Received October 22, 2001; revised June 18, 2002; accepted June 23, 2002 相似文献
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Rate constants for the gas-phase reactions of OH radicals, NO3 radicals and O3 with the C7-carbonyl compounds 4-methylenehex-5-enal [CH2=CHC(=CH2)CH2CH2CHO], (3Z)- and (3E)-4-methylhexa-3,5-dienal [CH2=CHC(CH3)=CHCH2CHO] and 4-methylcyclohex-3-en-1-one, which are products of the atmospheric degradations of myrcene, Z- and E-ocimene and terpinolene, respectively, have been measured at 296 ± 2 K and atmospheric pressure of air using relative rate methods. The rate constants obtained (in cm3 molecule–1 s–1 units) were: for 4-methylenehex-5-enal, (1.55 ± 0.15) × 10–10, (4.75 ± 0.35) × 10–13 and (1.46 ± 0.12) × 10–17 for the OH radical, NO3 radical and O3 reactions, respectively; for (3Z)-4-methylhexa-3,5-dienal: (1.61 ± 0.35) × 10–10, (2.17 ± 0.30) × 10–12, and (4.13 ± 0.81) × 10–17 for the OH radical, NO3 radical and O3 reactions, respectively; for (3E)-4-methylhexa-3,5-dienal: (2.52 ± 0.65) × 10–10, (1.75 ± 0.27) × 10–12, and (5.36 ± 0.28) × 10–17 for the OH radical, NO3 radical and O3 reactions, respectively; and for 4-methylcyclohex-3-en-1-one: (1.10 ± 0.19) × 10–10, (1.81 ± 0.35) × 10–12, and (6.98 ± 0.40) × 10–17 for the OH radical, NO3 radical and O3 reactions, respectively. These carbonyl compounds are all reactive in the troposphere, with daytime reaction with the OH radical and nighttime reaction with the NO3 radical being predicted to dominate as loss processes and with estimated lifetimes of about an hour or less. 相似文献
19.
Heinz Reuter 《Meteorology and Atmospheric Physics》1956,9(4):433-438
Zusammenfassung Eine Überprüfung der vonNamias abgeleiteten Formel zur Konstruktion sogenannter Trendkarten an Hand 20 ausgewählter Höhenkarten in der Zeit vom November 1955 bis Mai 1956 ergab eine vollkommene Bestätigung der vonNamias für Amerika angegebenen Korrelationskoeffizienten und des Faktors der entsprechenden Regressionsgleichung für den mitteleuropäischen Raum, obwohl die Untersuchungen sich auf die 850 mb-Topographie bezogen zum Unterschied vonNamias, der die 700 mb-Fläche zugrunde legte. Durch eine sinngemäße Kombination der in der synoptischen Praxis üblichen Konstruktionsmethode für 24 stündige Vorhersagekarten mit statistischen Überlegungen über die Abweichungen vom Normalwert gelingt die Ableitung einer Prognosenformel für eine dreitägige Mittelkarte, die als Grundlage für mittelfristige Wetterprognosen (Halbwochenprognosen) Verwendung findet. Die Formel weist gegenüber der Trendformel vonNamias den Vorteil auf, daß sie mit praktisch derselben Treffergenauigkeit einen wesentlich größeren Vorhersagezeitraum erfaßt.
Herrn Prof. Dr.H. Ficker zum 75. Geburtstag gewidmet. 相似文献
Summary Using 20 different contour charts during the period from November 1955 to May 1956 the formula for the construction of socalled trendcharts, primarily derived byNamias, has been verified for Central Europe though the investigations were based upon data from the 850 mb-level instead of the 700 mb-level used byNamias. Through a combination of the synoptic method for construction of forecast maps 24 hours in advance with statistic considerations about the departure from normals a formula is finally derived for a forecast of a three day mean chart. This formula has been successfully used for an extended forecast half week in advance. The described method shows an essential improvement upon theNamias procedure since a much greater forecast period can be obtained with almost the same accuracy.
Résumé La formule établie parNamias en vue de construire les cartes d'évolution a fait l'objet d'un examen critique fondé sur la discussion de vingt cartes d'altitude de la période de novembre 1955 à mai 1956. Les valeurs des coefficients de corrélation données par cet auteur pour l'Amérique du Nord ainsi que le coefficient de l'équation de régression correspondante ont été confirmés pour l'espace européen, bien que les topographies étudieés n'aient pas été les mêmes (850 mb au lieu de 700 mb). Combinant les méthodes usuelles de construction des cartes de prévision de vingt-quatre heures à des critères statistiques d'écart à la normale, l'auteur établit une formule de prévision destinée à calculer une carte moyenne de trois jours servant de base à la prévision à moyenne échéance. Cette formule présente sur celle deNamias l'avantage d'atteindre une plus longue période de prévision avec une égale exactitude.
Herrn Prof. Dr.H. Ficker zum 75. Geburtstag gewidmet. 相似文献
20.
F. Möller 《Meteorology and Atmospheric Physics》1954,7(1):158-169
Zusammenfassung Für eine Reihe von Atmosphärenmodellen, die untereinander gleiche Temperaturschichtung und konstante relative Feuchtigkeit, aber verschieden hohe Temperatur und Feuchtigkeit im festen Niveau haben, wird der NettostrahlungsstromE in 400 mb und am Boden durch Berechnungen in den bekannten Strahlungsdiagrammen bestimmt. Es läßt sich zeigen, daßE
400 (E
B
) als Funktion der Temperaturt
400 (t
B
) und der Feuchtigkeit bzw. des Taupunktes
400 (
B
) dargestellt werden kann [Abb. 1 und 3, Gl. (1) und (3)], ählich, wie das für die effektive Strahlung des BodensE
B
bereits früher durch die Formeln vonÅngström, Brunt u. a. geschehen ist. Wolkenschichten können durch Korrektionsfaktoren berücksichtigt werden. Die Abweichungen zwischen den so gewonnenen Strahlungssummen und den durch Planimetrieren im Strahlungsdiagramm berechneten sind im Durchschnitt kleiner als 3,5% (11%), für die Differenz E=E
400–E
B
sind sie kleiner als 6%.
Mit 4 Textabbildungen. 相似文献
Summary For a series of model atmospheres which have the same stratification of temperature and constant relative humidity but different temperatures and humidities at a fixed level, the net radiation fluxE at 400 mb and at the surface are determined by computations in the well known radiation charts. It is shown thatE 400 (E B ) can be represented as a function of the temperaturet 400 (t B ) and humidity resp. dew point 400 ( B ) [Fig. 1 and 3, formula (1) and (3)], in a similar manner as the outgoing radiationE B is already approximated by the formulae ofÅngström, Brunt, a. o. Cloud layers may be accounted for by correction factors. The differences between the radiation fluxes found in this way and those computed by integration in a radiation chart are in the average smaller than 3.5% (11%); with E=E 400–E B , the differences are smaller than 6%.
Résumé Pour plusieurs modèles de l'atmosphère qui ont la même structure par rapport à la température et une humidité relative constante, mais à un niveau fixe des températures et humidités différentes, on calcule à l'aide de diagrammes de radiation connus le flux net de radiationE pour 400 mb et au sol. On peut montrer queE 400 (E B ) peut être représenté comme fonction de la températuret 400 (t B ) et de l'humidité, resp. du point de rosée 400 ( B ) [Fig. 1 et 3, formules (1) et (3)], tout comme cela a déjà été fait pour la radiation effective au solE B grâce aux formules d'Ångström, deBrunt et d'autres. Par un facteur de correction on tient compte des couches de nuages. Les écarts entre les sommes de radiation ainsi obtenues et celles calculées à l'aide des diagrammes de radiation sont en moyenne plus petits que 3,5% (11%), la différence E=E 400–E B ne dépasse pas 6%.
Mit 4 Textabbildungen. 相似文献