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Amplitude modulada (AM) é uma modulação obtida pela convolução de dois sinais senoidais no tempo.
A transformada Z bilateral considera as amostras atuais, passadas e futuras do sinal e, assim, o sistema é não causal.
Se um sistema tem uma resposta ao impulso dada por h(t), então, ao se aplicar um sinal x(t) nesse sistema, a sua saída será a multiplicação entre x(t) e h(t).
Se 1/(RC) = A, então a função de transferência do circuito é igual a A/(s + A).
O circuito em questão é um filtro de segunda ordem.
A função de transferência do circuito em tela permanece inalterada se as posições do capacitor e do indutor forem invertidas, pois o sistema é linear e invariante no tempo.
O circuito apresentado é linear e causal, porque suas variáveis de saída dependem dos valores futuros das variáveis de entrada.
A cinemática inversa procura analisar os incrementos de posição ao longo do tempo de cada um dos componentes do braço de um robô.
A transformação que descreve a relação entre a mão de um manipulador robótico e o referencial de origem também descreve as relações entre os elos intermediários do braço de um robô.
Os atuadores elétricos utilizados para movimentar as juntas de um robô possuem o inconveniente de gerar arcos elétricos.
Judge the following item, based on the previous text.
According to the text, the speculations about extraterrestrial
life started in the late 1800s due to canal-like features
observed on Mars.
Judge the following item, based on the previous text.
The War of the Worlds was a radio drama that told the real
story of an invasion from Mars, panicking countless people.
Judge the following item, based on the previous text.
In the last sentence of the last paragraph, the word “prickly”
means peaceful.
Considering the previous text, judge the following item.
Although there is a movement of people ditching their
smartphones in order to have what they think is a better life
quality, millions believe digital technology is essential to
everyone’s lives.
Considering the previous text, judge the following item.
It was when Dulcie Cowling was in the park with her two
kids that she took her decision to ditch her smartphone and
then she told her family and friends about it after Christmas.
Considering the previous text, judge the following item.
People who are giving up on their mobile devices believe
they were spending too much time with being connected and
they were missing their real lives because of that.
Considering the previous text, judge the following item.
In the sentence (thirteenth paragraph) “Yet, while some
worry about how much time they spend on their handset, for
millions of others they are a godsend.”, the word “Yet” is
synonymous with However.
Considering the previous text, judge the following item.
According to the text, handsets are essential for people
because sometimes healthcare, education and social services
are offered only through smartphones.
Concerning the previous text and its linguistic aspects, judge the following item.
According to the text, in Spain there are villages that were
very important cities during the time of the American Wild
West.
Concerning the previous text and its linguistic aspects, judge the following item.
Rafael Molina owns one of the most famous film sets in the
history of Western movies.
