Енглески језик - учење, преводи и остало

  • Začetnik teme Začetnik teme sreca
  • Datum pokretanja Datum pokretanja
Toma93:
Moze braza pomoc , moram za 6-7 mj da naucim pricati engleski . Sada imam slabo znanje englesko. Koji je najbrzi nacin za ucenje tog jezika posto imam velike sanse da dobijem sportsku stipendiju samo ako solidno uradim SAT i TOEFL testove . Hvala u napred na pomoci ;)
Kliknite za proširenje...

Posto je ulog veliki, tj sportska stipendija, razmisli da ako nemas pozajmis novac za privatne casove kod nekog dobrog profesora. I budi spreman da tvrdo radis, dakle minimum dva casa sa profesorom svaki dan i minimum jos dva sata kuci. Jer malo je 6-7 meseci da stignes na SAT ili TOEFL nivo, osim ako ne radis svaki dan i to intenzivno
 
Stroncijum:
Posto je ulog veliki, tj sportska stipendija, razmisli da ako nemas pozajmis novac za privatne casove kod nekog dobrog profesora. I budi spreman da tvrdo radis, dakle minimum dva casa sa profesorom svaki dan i minimum jos dva sata kuci. Jer malo je 6-7 meseci da stignes na SAT ili TOEFL nivo, osim ako ne radis svaki dan i to intenzivno
Kliknite za proširenje...

Ne mora da znaci. Uz dobrog profesor, moze on to brzo da sredi, ali se njegov rad kod kuce podrazumeva.
 
Toma93:
Moze braza pomoc , moram za 6-7 mj da naucim pricati engleski . Sada imam slabo znanje englesko. Koji je najbrzi nacin za ucenje tog jezika posto imam velike sanse da dobijem sportsku stipendiju samo ako solidno uradim SAT i TOEFL testove . Hvala u napred na pomoci ;)
Kliknite za proširenje...

kao sto je jednom Liza rekla. Da zivis u sredini gde se taj jezik govori. To ti je najbrzi nacin. Ali posto ti hoces kad odes tamo da vec znas engleski, imas assimil program za ucenje stranog jezika, veoma dobra metoda.
 
Toma93:
Moze braza pomoc , moram za 6-7 mj da naucim pricati engleski . Sada imam slabo znanje englesko. Koji je najbrzi nacin za ucenje tog jezika posto imam velike sanse da dobijem sportsku stipendiju samo ako solidno uradim SAT i TOEFL testove . Hvala u napred na pomoci ;)
Kliknite za proširenje...

Gledaj americke filmove al ne ove novije produkcije da se ne zaglupis
 
Može li neko da mi prevede ovu stranicu knjige sutra treba da radim nekakvu preyentaciju a nisam siguran u sopstveni prevod ovog jer slabo poynajem engleski, može li neko da mi prevede ovona srpski molim vas, bar neki deo od ovoga:worth::(


1.2 CHEMICAL MEASUREMENTS — THE THREELEGGED
PLATFORM
Sound chemical information that forms the basis of many of humanity’s important
decision-making processes depends on three critical properties of the measurement
process, including its (1) chemical properties, (2) physical properties, and (3) statistical
properties. The conditions that support sound chemical measurements are
like a platform supported by three legs. Credible information can be provided only
in an environment that permits a
thorough understanding
and control
of these three
critical properties of a chemical measurement:
1. Chemical properties, including stoichiometry, mass balance, chemical
equilibria, kinetics, etc.
2. Physical properties, including temperature, energy transfer, phase transitions,
etc.
3. Statistical properties, including sources of errors in the measurement
process, control of interfering factors, calibration of response signals,
modeling of complex multivariate signals, etc.
If any one of these three legs is missing or absent, the platform will be unstable
and the measurement system will fail to provide reliable results, sometimes with
catastrophic consequences. It is the role of statistics and chemometrics to address
the third critical property. It is this fundamental role that provides the primary
motivation for developments in the field of chemometrics. Sound chemometric
methods and a well-trained work force are necessary for providing reliable chemical
information for humanity’s decision-making activities. In the subsequent sections,
we begin our presentation of the topic of chemometrics by defining the term.
1.3 CHEMOMETRICS
The term chemometrics was first coined in 1971 to describe the growing use of
mathematical models, statistical principles, and other logic-based methods in the
field of chemistry and, in particular, the field of analytical chemistry. Chemometrics
is an interdisciplinary field that involves multivariate statistics, mathematical modeling,
computer science, and analytical chemistry. Some major application areas of
chemometrics include (1) calibration, validation, and significance testing; (2) optimization
of chemical measurements and experimental procedures; and (3) the extraction
of the maximum of chemical information from analytical data.
In many respects, the field of chemometrics is the child of statistics, computers,
and the “information age.” Rapid technological advances, especially in the area of
computerized instruments for analytical chemistry, have enabled and necessitated
phenomenal growth in the field of chemometrics over the past 30 years. For most of
this period, developments have focused on multivariate methods. Since the world
around us is inherently multivariate, it makes sense to treat multiple measurements
simultaneously in any data analysis procedure. For example, when we measure the
ultraviolet (UV) absorbance of a solution, it is easy to measure its entire spectrum
© 2006 by Taylor & Francis Group, LLC
Introduction to Chemometrics
3
quickly and rapidly with low noise, rather than measuring its absorbance at a single
wavelength. By properly considering the distribution of multiple variables simultaneously,
we obtain
more information
than could be obtained by considering each
variable individually. This is one of the so-called
multivariate advantages
. The additional
information comes to us in the form of correlation. When we look at one variable
at a time, we neglect correlation between variables, and hence miss part of the picture.
A recent paper by Bro described four additional advantages of multivariate
methods compared with univariate methods [1]. Noise reduction is possible when
multiple redundant variables are analyzed simultaneously by proper multivariate
methods. For example, low-noise factors can be obtained when principal component
analysis is used to extract a few meaningful factors from UV spectra measured at
hundreds of wavelengths. Another important multivariate advantage is that partially
selective measurements can be used, and by use of proper multivariate methods,
results can be obtained free of the effects of interfering signals. A third advantage
is that false samples can be easily discovered, for example in spectroscopic analysis.
For any well characterized chemometric method, aliquots of material measured in
the future should be properly explained by linear combinations of the training set
or calibration spectra. If new, foreign materials are present that give spectroscopic
signals slightly different from the expected ingredients, these can be detected in the
spectral residuals and the corresponding aliquot flagged as an outlier or “false
sample.” The advantages of chemometrics are often the consequence of using multivariate
methods. The reader will find these and other advantages highlighted
throughout the book.
 
Prijavite se ili registrujte da biste poslali poruku.

Slične teme

Nina
Mapa indoevropskih jezika
Odgovora
9
Pregleda
324
Edmund
Edmund
Nina
Zdravica i zdravičarenje
Odgovora
4
Pregleda
212
Plant
P
Nina
Slovo o jeziku
Odgovora
0
Pregleda
173
Nina
Nina

Back
Top