题目内容
（请给出正确答案）
A.43dBm
B.-7dB
C.-3dB
D.53dBm
参考答案
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更多“Cell Maximum Transmission Power（小区下行所有物理信道加起来所允许的最大发射功率），以下哪个值得配置是合理的（）”相关的问题
Potassium dichromate and potassium permanganate have over lapping absorption spectra in 1mol·L-1H2SO4. K2Cr2O7has an absorption maximum at 440nm，and KMnO4has a band at 545nm. A mixture is analyzed by measuring the absorbance at these two wavelengths with the following result：A440=0.405，A545=0.712 in a 1.00cm cell(approximate；exact length not known). The absorbances of pure solution of K2Cr2O7(1.00×10-3mol·L-1)and KMnO4(2.00×10-4mol·L-1)in 1mol·L-1H2SO4，using the same cell gave the following resuits；
ACr,440=0.374，ACr,545=0.009，AMn,440=0.019，AMn,545=0.475. Calculate the concentrations of dichromate and permanganate in the sample solution.
For free space transmission, if the transmi power is
, the receive power is
, and the propagation distance is d, then the correct formulas include a.
, where k is a constant. b.
, where k is a constant. c.
, where k is a constant. d.
, where k is a constant.
A、错
B、对
C、对
D、对
Skycell, a major European cell phone manufacturer, is making production plans for the coming year. Skycell has worked with its customers (the service providers) to come up with forecasts of monthly requirements (in thousands of phones) as shown in Table 3-1. Manufacturing is primarily an assembly operation, and capacity is governed by the number of people on the production line. The plant operates for 20 days a month, eight hours each day. One person can assemble a phone every 10 minutes. Workers are paid 20 euros per hour and a 50 percent premium for overtime. The plant currently employs 1,250 workers. Component cost for each cell phone totals 20 euros. Given the rapid decline in component and finished-product prices, carrying inventory from one month to the next incurs a cost of 3 euros per phone per month. Skycell currently has a no-layoff policy in place. Overtime is limited to a maximum of 20 hours per month per employee. Assume that Skycell has a starting inventory of 50,000 units and wants to end the year with the same level of inventory.
(a) Assuming no backlogs, no subcontracting, and no new hires, what is the optimum production schedule？ What is the annual cost of this schedule？ (b) Is there any value for management to negotiate an increase of allowed overtime per employee per month from 20 hours to 40？ (c) Reconsider parts (a) and (b) if Skycell starts with only 1,200 employees. Reconsider parts (a) and (b) if Skycell starts with 1,300 employees. What happens to the value of additional overtime as the workforce size decreases？ (d) Consider part (a) for the case in which Skycell aims for a level production schedule such that the quantity produced each month does not exceed the average demand over the next 12 months (1,241,667) by 50,000 units. Monthly production including overtime is no more than 1,291,667. What would be the cost of a level production schedule？ What is the value of overtime flexibility？
The maximum tensile force in the bar should be
A、12KN
B、20KN
C、8KN
D、13KN
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