排序方式： 共有8条查询结果，搜索用时 15 毫秒
1
1.
Based on the survey data of 250 farmers from the Multan district of Southern region of Punjab, Pakistan this study aims to empirically examine the determinants of access to agricultural credit. This study used the probit model to analyze the data. The results revealed that formal education, farm size, level of farm mechanization, farm revenue and landholding size positively and significantly influenced access to agricultural credit while the age of the farmer’s, distance, and off- farm income negatively and insignificantly influenced farmer’s accessibility to agricultural credit. The findings of the current study offer a policy guideline to streamline national policy on agricultural finance. This study also recommends that ZaraiTaraqiati Bank (ZTBL) and other Commercial Banks should improve their agricultural credit schemes to fulfil the diversified needs of small farm holders.
相似文献2.
Ummul Fahri Abdul Rauf Panlop Zeephongsekul 《Theoretical and Applied Climatology》2014,115(1-2):153-166
The main objective of this study is to investigate the joint distribution of rainfall severity and rainfall duration in the state of Victoria, Australia, based on monthly rainfall data from selected rain-gauge stations which are located in the north-eastern and south-western parts of the state, during the period from 1950 to 2010. Traditional approach for considering the joint distribution of rainfall characteristics using standard bivariate modeling presents some limitations that can be circumvented by using Copula models. Archimedean and extreme-value copulas will be used to obtain the bivariate distribution of rainfall severity and duration. The Standard Precipitation Index (SPI), which is employed extensively to quantify rainfall severity, will be discussed in detail. Several goodness of fit tests will be performed to find the best fitting copulas and the results will be summarized. The final fitted copulas will then be applied to obtain the joint and conditional return periods from a minimum of two years to one hundred years of rainfall events in Victoria. 相似文献
3.
János Kovács Szabolcs Á. Fábián Gábor Varga Karoly Németh Corina Risso Francisco Nullo Gabor Kereszturi Titusz Bugya Szabolcs Á. Fábián Noémi L. Görcs István P. Kovács Bertalan Radvánszky Gabriella Barta Rudolf Musil Alice Ghiselli Marzio Merazzi Andrea Strini Roberto Margutti Michele Mercuriali Rauf Gardashov Daria Gushchina Boris Dewitte Martin Michálek Marián Putiš Christoph A. Hauzenberger Jindřich Šancer Martin Štrejbar Aneta Maleňáková George Migiros George D. Bathrellos Hariklia D. Skilodimou Theodoros Karamousalis 《Central European Journal of Geosciences》2011,3(2):229-229
4.
R. G. Gardashov 《Izvestiya Atmospheric and Oceanic Physics》2006,42(5):632-636
With reference to the model of a random Gaussian homogeneous cylindrical (one-dimensional) sea surface z = ζ(x), the inverse problem is formulated in the form of the integral Fredholm equation of the first kind to determine the distribution density of the number of specular points on the sea surface. The kernel of the equation is determined in terms of the Fourier transform of the distribution density of radii of surface curvature at the points of specular reflection. The equation derived by the author earlier for the distribution density and written for the dimensionless radius of curvature contains no parameters, a result that is indicative of the universal character of this distribution for an arbitrary Gaussian surface. The validity of the original formulas obtained in this paper was verified by simulations. 相似文献
5.
Evaluation of analyses of leachate for inorganic constituents, from selected landfills in Illinois indicates that leachate
quality is variable and is strongly affected by waste type and cover material. Twenty parameters were detectable in all samples,
but selenium was not detected in any of the samples analyzed. More than 98% of the mean leachate composition was comprised,
in descending order, of total alkalinity (bicarbonate plus carbonate), sulfate, sodium plus potassium, calcium plus magnesium,
chloride, and iron plus managese. Excluding iron, trace metals contributed less than one percent to the total; of these, copper,
zinc and boron were most significant.
Based on milliequivalents per liter of major constituents, approximately 73 percent of the cations and 92% of the anions fall
within the concentration range of potable waters. Heavy metals, organics, suspended matter, microorganisms, odor and color
are among the objectionable qualities of leachate which should not be present in potable waters.
In assessing the impact of leachate on ground-water quality, use of indicator parameters in place of comprehensive analyses
for routine water samples is frequently desirable in the interest of both time and economics. Availability, mobility, persistence,
analyticity and contrast of concentrations in leachate and ground water are important factors to consider in selection of
an indicator. Boron, iron, ammonia and total dissolved solids appear to be reliable parameters for indicating ground-water
pollution by leachate. Chloride and hardness may also be useful under certain conditions. Sulfate was the least reliable parameter
considered. Although many of the trace elements in leachate exceed Illinois Environmental Protection Agency Public Water Supply
Standards in more than 50% of the samples, these elements are most useful as indicators when a waste rich in trace elements
is deposited in a landfill of unfavorable hydrogeology. 相似文献
6.
Rauf Gardashov 《Central European Journal of Geosciences》2011,3(2):169-174
The problem is studied both theoretically and experimentally. Statistical distributions of the total curvature and the reciprocal to the total curvature at the specular points (SP) of a random Gaussian uniform sea surface are discussed. The theoretical distribution and its asymptotes are completely investigated. The validity of the theoretical distribution is verified by numerical simulations and natural experiments. In the experimental study of this distribution, Sun glint images taken with a high time and spatial resolution digital camera are used. Those images are developed by using a specially-designed Fortran program which calculates the statistical characteristics of the glints. The experimentally derived distribution of the glint areas is compared with the theoretical distribution. The main causes (origins) of small divergence between the theoretical and experimental results are discussed. 相似文献
7.
The inverse problem in the form of Fredholm integral equation of the first kind for determining the distribution density of
the number of specular points of 3-D Gaussian sea surface is formulated and solved. The kernel of this equation is determined
by the characteristic function of the distribution of radii of curvature at the specular points. On the basis of numerical
experiments, and also by using images of the Sun glitters it is shown that on the known distribution density of the intensity
of reflected light it is possible to define the distribution densities of both the number of specular points and the radii
of curvature at the specular points. 相似文献
8.
Natural Hazards - Agriculture involves multiple risks of which environmental and production threats are major ones. Farmers’ risk attitudes and risk perceptions have a significant role in... 相似文献
1