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提问人:网友cloudy_gz 发布时间:2022-01-07
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Aliasing refers to the phenomenon of a high-frequency component in the spectrum of the signal seemingly taking on the identity of a lower frequency in the spectrum of its sampled version.

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更多“Aliasing refers to the phenomenon of a high-frequency component in the spectrum of the signal seemin…”相关的问题
第1题
The gravity model assumes that size and distance are important for trade.
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第2题
The Dai, Miao, Bai, Buyi and Shui groups in China all enjoy Dragon Boat races. It was originally a sacrificial activity to the God of water or the dragon, which can be traced back to ______ time.

A、Tang Dynasty

B、the Warring States

C、Shang Dynasty

D、Ming Dynasty

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第3题
Speech and writing came into being at much the same time in the human history.
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第4题
Section D

听力原文: The fourth component of the Swedish social system is that its policies ensure full employment and increase the mobility of labour—that is, the ability to change jobs without losing income. Swedes have a strong work ethic. This, combined with state-funded programmes that minimise unemployment, results in a policy of subsidised employment, which Sweden prefers to high unemployment rates and large welfare expenditures. So, there are a large number of vocational training programmes that employers pay for available to workers in jobs that have become unnecessary. There are also subsidies for workers who must change jobs because of changes in the labour market.

Sweden introduced the fifth and final component of its social system at the end of the 20th century. This component corrects some of the problems created by the four previously mentioned components. It includes new rules that are designed to improve job stability, such as training programmes to help employees learn new skills as their jobs change and become more complex. Also, the government has reduced social insurance and welfare payments.

So, in conclusion, the Swedes are happy with their system. Sweden has achieved more in terms of social equality, economic security and freedom than many other economies. As a result, most Swedes aren’t interested in any more reform. of the economic system. However, because it is heavily involved in international markets, Sweden must continue to manage its social policies so that it remains competitive in the international marketplace.

The fourth component of the Swedish social system is that its policies ensure full employment and increase the mobility of labour—that is, the ability to change jobs without【21】______ income, Swedes have a strong work ethic. This, combined with state-funded programmes that【22】______unemployment, results in a policy of subsidised employment, which Sweden prefers to high unemployment rates and large welfare【23】______. So, there are a large number of【24】______training programmes that employers pay for【25】______to workers in jobs that have become unnecessary. There are also subsidies for workers who must change jobs because of changes in the labour market.

Sweden introduced the fifth and final component of its social system at the end of the 20th century. This component corrects some of the problems created by the four【26】______ mentioned components. It includes new rules that are designed to improve job stability, such as training programmes to help employees learn new skills as their jobs change and become more【27】______. Also, the government has reduced social【28】______and welfare payments.

So, in conclusion, the Swedes are happy with their system. Sweden has achieved more in terms of social equality, economic【29】______than many other economies. As a result, most Swedes aren’t interested in any more reform. of the economic system. However, because it is【30】______in international markets, Sweden must continue to manage its social policies so that it remains competitive in the international marketplace.

(21)

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第5题
The days on the moon get hotter than ________ water. (boil的合适形式)
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第6题

10. The Passover Story Passover, or Pesach in Hebrew, is one of the Jewish religion’s most sacred and widely observed holidays. Passover commemorates the story of the Israelites’(以色列人的) departure from ancient Egypt, which appears in the Hebrew Bible’s books of Exodus(出埃及记), Numbers(民数记) and Deuteronomy(申命记), among other texts. Jews observe the weeklong festival with a number of important rituals, including a traditional Passover meals known as a seder, the removal of leavened(加酵母的)products from their home, the substitution of matzo(犹太逾越节薄饼)for bread and the retelling of the exodus tale. According to the Hebrew Bible, Jewish settlement in ancient Egypt first occurs when Joseph, a son of the patriarch Jacob and founder of one of the 12 tribes of Israel, moves his family there during a severe famine in their homeland of Canaan. For many years the Israelites live in harmony in the province of Goshen, but as their population grows the Egyptians begin to see them as a threat. After the death of Joseph and his brothers, the story goes, a particularly hostile pharaoh(法老)orders their enslavement and the systematic drowning of their firstborn sons in the Nile. One of these doomed infants is rescued by the pharaoh’s daughter, given the name Moses (meaning “one who is pulled out”) and adopted into the Egyptian royal family. When he reaches adulthood, Moses becomes aware of his true identity and the Egyptians’ brutal treatment of his fellow Hebrews. He kills an Egyptian slave master and escapes to the Sinai Peninsula, where he lives as a humble shepherd for 40 years. One day, however, Moses receives a command from God to return to Egypt and free his kin from bondage, according to the Hebrew Bible. Along with his brother Aaron, Moses approaches the reigning pharaoh (who is unnamed in the biblical version of the story) several times, explaining that the Hebrew God has requested a three-day leave for his people so that they may celebrate a feast in the wilderness. When the pharaoh refuses, God unleashes 10 plagues on the Egyptians, including turning the Nile River red with blood, diseased livestock, boils, hailstorms and three days of darkness, culminating in the slaying of every firstborn son by an avenging angel. The Israelites, however, mark the doorframes of their homes with lamb’s blood so that the angel of death will recognize and “pass over” each Jewish household. Terrified of further punishment, the Egyptians convince their ruler to release the Israelites, and Moses quickly leads them out of Egypt. The pharaoh changes his mind, however, and sends his soldiers to retrieve the former slaves. As the Egyptian army approaches the fleeing Jews at the edge of the Red Sea, a miracle occurs: God causes the sea to part, allowing Moses and his followers to cross safely, then closes the passage and drowns the Egyptians. According to the Hebrew Bible, the Jews—now numbering in the hundreds of thousands—then trek through the Sinai desert for 40 tumultuous years before finally reaching their ancestral home in Canaan, later known as the Land of Israel. 20. Which one of the following is NOT one of Passover traditions?

A、A seder.

B、Marking the doorframes of homes with lamb’s blood.

C、The retelling of the exodus tale.

D、Having the matzo.

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第7题
For both m-law and A-law, the signal-to-noise (SNR) of low-level and high-level signals improve with the increasing m and A.
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第8题
Performance of a PCM system is only affected by quantization noise.
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第9题
In the sampling process, if the sampling period is larger than the Nyquist interval, then the sampled signal can be completely described by the sample values.
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第10题
One of the important advantages of pulse-code modulation (PCM) is the robustness to channel noise and interference.
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