Title : Implementation of quadrature modulation and demodulation
Design Object : By implementing quadrature modulation and demodulation of analog signals in digital signal processing, students will have better understanding of sampling and frequency analysis of discrete-time signals.
Design Content : Make a MATLAB function which performs quadrature modulation and demodulation for a input signal with anti-aliasing filtering.
The Java Platform, Enterprise Edition 5 (Java EE 5) has two different but complementary
technologies for producing dynamic web Content in the presentation tier—namely Java
Servlet and JavaServer Pages (JSP).
Java Servlet, the first of these technologies to appear, was initially described as extensions
to a web server for producing dynamic web Content. JSP, on the other hand, is a newer technology
but is equally capable of generating the same dynamic Content. However, the way in
which a servlet and a JSP page produce their Content is fundamentally different servlets
embed Content into logic, whereas JSP pages embed logic into Content.
As a general rule, PhD students and their supervisors tend to focus
primarily, or even exclusively, on the Content of the research that will
go into the doctoral thesis. Other issues are often taken for granted:
how to organize your work, give a presentation, work in a team, cope
with your supervisor, and how to effectively manage your time.When
asked, former PhD students usually claim that the general experience
of being a graduate student, which includes learning how to solve
complex problems and work well with others, was of greater value to
their careers than the actual topic of their thesis.
Collection of key-value pairs.
TDictionary represents a generic collection of key-value pairs.
This class provides a mapping from a collection of keys to a collection of values. When you create a TDictionary object, you can specify various combinations of initial capacity, equality operation, and initial Content.
You can add a key that is associated with a corresponding value with the Add or AddOrSetValue methods. You can remove entries with Remove or Clear, which removes all key-value pairs. Adding or removing a key-value pair and looking up a key are efficient, close to O(1), because keys are hashed. A key must not be nil (though a value may be nil) and there must be an equality comparison operation for keys.
You can test for the presence or keys and values with the TryGetValue, ContainsKey and ContainsValue methods.
The Items property lists all Count dictionary entries. You can also set and get values by indexing the Items property. Setting the value this way overwrites any existing value.
The class TObjectDictionary inherits from TDictionary and provides an automatic mechanism for freeing objects removed from dictionary entries.
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Lithium–sulfur batteries are a promising energy-storage technology due to their relatively low cost and high theoretical energy density. However, one of their major technical problems is the shuttling of soluble polysulfides between electrodes, resulting in rapid capacity fading. Here, we present a metal–organic framework (MOF)-based battery separator to mitigate the shuttling problem. We show that the MOF-based separator acts as an ionic sieve in lithium–sulfur batteries, which selectively sieves Li+ ions while e ciently suppressing undesired polysulfides migrating to the anode side. When a sulfur-containing mesoporous carbon material (approximately 70 wt% sulfur Content) is used as a cathode composite without elaborate synthesis or surface modification, a lithium–sulfur battery with a MOF-based separator exhibits a low capacity decay rate (0.019% per cycle over 1,500 cycles). Moreover, there is almost no capacity fading after the initial 100 cycles. Our approach demonstrates the potential for MOF-based materials as separators for energy-storage applications.
3 Dimensions TV (3DTV) became commercially available in the United States
in 2010 and service in other countries was expected to follow soon thereafter.
3DTV is a subset of a larger discipline known as 3D Video (3DV). There are
now many routine vendor announcements related to 3DTV/3DV, and there are
also conferences wholly dedicated to the topic.
