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One cell has 2 TRXs （14 timeslots used for TCH).How many Erlang can this cell carry if t

One cell has 2 TRXs (14 timeslots used for TCH).How many Erlang can this cell carry if the QoS (blocking rate) is 2%？（）

A.2.7 Erlang

B.8.2 Erlang

C.16.0 Erlang

D.14.0 Erlang

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发布时间：2022-07-19

更多“One cell has 2 TRXs （14 timeslots used for TCH).How many Erlang can this cell carry if t”相关的问题

第1题

Which of the following statements is incorrect？（)

A.One TG consists of up to 16 TRXs

B.One TG can be connected to a maximum of 32 cells

C.A cell can be connected to one only

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第2题

Zinc(II) and the ligand L form. a product cation that absorbs strongly at 600 nm. As l

Zinc（II) and the ligand L form. a product cation that absorbs strongly at 600 nm. As l

ong as the concentration of L excess that of zinc (II) by a factor of 5, the absorbance of the solution is only lined on the cation concentration. Neither zinc(I) nor L absorbs at 600 nm. A solution that is 1.60X10^-6mol·L^-1in zinc (II) 1.00 mol·L^-1in L has an absorbance of

0.164 in a 1.00 cm cell at 600 nm.Calculate

(1) the transmittance of this solution.

(2) the transmittance of this solution in a 3 cm cell.

(3) the molar absorbance of the complex at 600 nm.

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第3题

One reason that I may be the last person in Manhattan without a cell phone is that I

A.thrill

B.cherish

C.abandon

D.deprive

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第4题

Passage Two Modern humans emerged some 250,000 years ago, yet agriculture is a fairly

recent invention, only about 10,000 years old. Many crop plants are rather new additions to our diet: broccoli (a flowering mutant of kale) is thought to be only 500 years old. Most innovation is far more recent still. Although Austrian monk Gregor Mendel's pea plant experiments quietly laid the basic foundations of genetics in the mid-19th century, his work was rediscovered and applied to crop breeding only at the beginning of the 20th century. Further advances have steadily accumulated. The 1940s saw the identification of DNA as genetic material and the adoption, by commercial breeders, of genetic modification - typically by applying chemicals or radiation to DNA to try to make plants with advantageous characteristics. The modifications ultimately led to the green revolution of the 1960s and 1970s, during which time global wheat yields tripled. The 1980s and 1990s saw the commercial adoption of agricultural biotechnology, which has allowed breeders to introduce specific genes into crops from the same or different species. In 2004 the first plant genome was fully sequenced, and since then the number of plant gene sequences in GenBank, the public repository for gene sequence information, has been doubling every two years. Our knowledge is increasing exponentially, as it has been in other fields such as semiconductors and cellular telephony. Our challenge is to increase agricultural yields while decreasing the use of fertilizer, water, fossil fuels and other negative environmental inputs. Embracing human ingenuity and innovation seems the most likely path. Plants did not evolve to serve humans, and their sets of genes are incomplete for our purposes. The integral role of modifying genes is obvious to all breeders, though sometimes painfully absent from the public's understanding of how modern agriculture succeeds. All breeding techniques, from before Mendel's time until today, exploit modifications to plant DNA. These modifications can take the form. of mistakes or mutations that occur during natural cell division in the wild; the natural but random movement of DNA sequences from one part of a plant's genome to another; or the more precise insertion of known gene sequences using biotechnology. In all these cases, plant genes are moved within or across species, creating novel combinations. Hybrid genetics - the combination of different versions of the same gene – has resulted in spectacular yield increases. Largely as the consequence of using hybrid seed varieties, corn yields in the U.S. have increased more than 500 percent in the past 70 years. Questions 6-10 are based on Passage Two.

(1)Which statement is correct according to paragraph one？

A、Broccoli was first bred by Mendel

B、Broccoli wasn’t considered edible until 500 years ago

C、Mendel's work was considered most important in the history of genetics

D、Mendel’s study found its major application some 100 years ago

(2)What was cited as a result of the green revolution？

A、Sharp rise in worldwide wheat production

B、Extensive use of organic fertilizer

C、Large-scale adoption of genetic modification

D、Commercial success of genetically modified seeds.

(3)Which statement is true of GenBank according to the passage？

A、The number of gene sequences has doubled since its foundation

B、The commercial breeders are its main sponsors

C、It is a genetic sequence database

D、It was founded in 2004

(4)It can be learned from the passage that the significance of genetic modification is ______.

A、questioned by some critics

B、poorly conveyed to the public

C、appreciated by all breeders

D、fully understood only by scientists

(5)The word “novel” in paragraph three is closest in meaning to ______.

A、artificial

B、various

C、hybrid

D、new

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第5题

Recent media attention has focused on a possible link between cell phone use and brain

cancer,originally,because of a lawsuit that alleged such a link.Network news programs ran their own tests of cell phones,reporting to the public that some cell phones exceed the maximum level In 2000,it was estimated that there were 92 million cell phone users in the United States and this number was growing by 1 million every month.More recently,the Cellar Telecommunications & Internet Association estimated that there were almost 170 million US cell phone users,and the seriousness of brain tumours,this is clearly a topic of wide concern.This report summarizes what we now know about the carcinogenicity of using cell phones.of emitted radio frequency energy allowed by the US Federal Communications Commission.

Cell phones operate with radio frequencies,a form. of energy located on the electromagnetic spectrum between FM radio waves and the waves used in microwave ovens,radar,and satellite stations.Cell phones do not emit ionizing radiation,the type that damages DNA and is known to have the ability to cause cancer.

Cell phone technology works on a system of geographically separated zones called"cells".Each cell has its own "base station" that both receives and emits radio waves.When a call is placed from a cell phone,a signal is sent from the cell phone antenna to that cell's base station antenna.The base station responds to the cell phone signal by assigning the phone an available RF channel.When the RF channel is assigned,radio signals are simultaneously received and transmitted,allowing voice information to be carried between the cell phone and the base.The base station transfers the call to a switching centre, where the call can be transferred to a local telephone carrier or another cell phone.

6.There has existed argument about the link between cell phone and brain tumor()

7.The rapid growing number of cell phone users has been a great concern in the US()

8.The 3rd paragraph tries to prove that cell phones do not cause brain cancer()

9.A switching centre is needed when we make a call through cell phone()

10.The topic of the passage is about cell phone and cancer.()

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第6题

Deliveries often arrive too late.You, therefore want to send reminders to your vendor

s.Which prerequisites must be fulfilled to generate reminders for a purchase？ Order item？ There are 2 correct answers to this question.()

A.You have entered at least one reminder level in the purchase order item

B.The purchase order must be output

C.The delivery date is at least one week in the past