某蒸汽动力厂按一级再热理想循环工作,新蒸汽参数为p1=15MPa,t1=600℃,再热压力pA=1.4MPa,再热温度tR=t1=600℃,背压p2=0.005MPa。功率为150000kW。试求:①定性画出循环的T-s图;②求循环热效率;③每小时所需蒸汽量。
蒸汽的有关参数如下:
p/MPa | t/℃ | h/(kJ/kg) | s/[kJ/(kg·K)] |
15 | 600 | 3582.3 | 6.6776 |
I.4 | 2892.84 | 6.6776 | |
1.4 | 600 | 3694.8 | 7.8710 |
0.005 | 2401.11 | 7.8710 | |
15 | 152.89 | 0.4762 |
饱和水的性质:
p/MPa h'/(kJ/kg) s'/[kJ/(kg·K)]
0.005 137.89 0.4762
有一位置随动系统,结构图如图3-5所示。K=40,τ=0.1。(1)求系统的开环和闭环极点;(2)当输入量R(s)为单位阶跃函数时,求系统的自然振荡角频率ωn,阻尼比f和系统的动态性能指标tr,ts,σ%。
一个垄断者如具有下列长期总成本和总收益曲线:
π=0.01Q2+12Q
TR=-0.04Q2+22Q
当最高价格分别为P=15和P=16时,它的利润最大化时的产量在前一价格和后一价格时相等。( )
请根据合同、信用证相关要求以及补充材料填制装箱单、装船通知。
补充材料:
(1)Shipping Mark: ABC
HELSINKI
No.1-400
(2)2011年12月3日开出装箱单;12月13日装船,船名SUISUN V.103
(3)G.W.为3600kgs,N.G为3500kgs
(4)B/LNo.:KEN 05-25401
售货合同
SALES CONTRACT
卖方: SHANGHAI XINXIN TRADING
Seller:Co., LTD.Contract No. :08SGQ468001
Date:Nov. 15th. 2011
地址: Signed at:SHANGHAI
Address:88, CHUNGSHAN ROAD E.I., SHANGHAI, CHINATelex:021 GDLEA CN
Fax:86-2155668888
Buyer: ABC COMPANY LIMITED, FINLAND
Address:KEDSANTERINK AUTO P.O. BOX 9, FINLANDTelex:______
Fax:+1[250]8285155
This Sales Contract is made by and between the Sellers and the Buyers, whereby the Sellers agree to sell andthe Buyers agree to buy the under-mentioned goods according to the terms and conditions stipulated below:
(1)货号、品名及规格 Name of Commodity and Specification | (2) 数量 Quantity | (3) 单位 Unit | (4) 单价 Unit Price | (5)金额 Amount |
TRANGLE BRAND 3U--SHAPE ELECTRONIC ENERGY SAVING LAMP TR—3U—A 110V 5W E27/B22 TR—3U—A 110V 7W E27/B22 TR—3U—A 110V 22W E27/B22 TR—3U—A 110V 26W E27/B22 5% more or less both in amount and quantity allowed | 5000PCS 5000PCS 5000PCS 5000PCS | PC PC PC PC | USD2.50/PC USD3.00/PC USD3.80/PC USD4.20/PC | USD12500.00 USD15000.00 USD19000.00 USD21000.00 |
Total Amount | USD67500.00 |
(6) Packing:CARTON(7) Delivery FromSHANGHAItoHELSINKI(8) Shipping Marks:N/M
(9) Time of Shipment: Within30days after receipt of L/C. Allowing transshipment and partial shipment.
(10) Terms of Payment: By100% Irrevocable Letter of Credit in favor of the Sellers to be available by sight draftto be opened and to reach China beforeDEC.1st,2011and to remain valid for negotiation in China until the 15thdays after the foresaid Time of Shipment. L/C must mention this contract number. L/C advised by BANK OFCHINA, SHANGHAI BRANCH.TLX: 444U4K GZBC. CN. ALL banking Charges outside China (the mainland ofChina) are for account of the Drawee.
(11) Insurance: To be effected by Sellers for 110% of full invoice value coveringF.P.Aup toHELSINKI.
(12) Quality/Quantity Discrepancy and Claim:
In case of the quality and/or quantity/weight are found by the Buyers to be not in conformity with the Contractwith the Contract after arrival of the goods at the port of destination, the Buyers may lodge claim with the Sellerssupported by survey report issued by an inspection organization agreed upon by both parties, with the exception,however, of those claims for which the insurance company and or the shipping company are to be held responsible,claim for quality discrepancy claim should be filed by the Buyers within 15 days after arrival of the goods at theport of destination. The Sellers shall, within 30 days after receipt of the notification of the claim, send reply to theBuyers.
(13) Force Majeure: In case of Force Majeure, the Sellers shall not be held responsible for late delivery ornon-delivery of the goods but shall notify the Buyers by cable. The Sellers shall deliver to the Buyers by registeredmail, if so requested by the Buyers, a certificate issued by the China Council for the Promotion of InternationalTrade or/and competent authorities.
(14) Arbitration: All dispute arising from the execution of or in connection with this contract shall be settledamicably by negotiation. In case of settlement can be reached through negotiation the case shall then be submit
China International Economic&Trade Arbitration Commission.In Shanghai(or in Beijing)for arbitration in actwith its sure of procedures.The arbitral award is final band binding upon both parties for setting the Dispute.Thefee,for arbitration shall be borne by the losing party unless otherwise awarded.
(15)Shipping advice must be sent to buyer within 2 days after shipment advising number of packages.gross&net weight,vessel name,Bill of Lading No.and date,contract No.Value.
The Seller:×××The Buyer:×××
ISSUE OF A DOCUMENTARY CREDIT
2011 NOV. 25 Logical Terminal GDPF
MTS700 Page 00001
Func JSRVPR1
UserHeader Service Code 103:
Bank Priority 113:
Msg User Ref. 108:
Info. From CI 115:
SequenceofTotal *27 : 1/1
Form ofDoc. Credit *40A: IRREVOCABLE
DoC. CreditNumber *20 : LRT0402457
Date oflssue 31C: 20111125
Expiry *31D: 20120110
Applicant *50 : A.B.C. CORP.
AKEKSANTERINK AUTO
P. O. BOX 9,FINLAND
Beneficiary * 59: SHANGHAIXINXIN TRADING CO.,LTD.
88,CHUNGSHAN ROAD E.1,SHANGHAI,CHINA
Amount *32B: Currency USD Amount 67500.00
Pos./Neg.Tol.(%) 39A: 05/05
Available with/by *41D: BANK OF CHINA
Draft at… 42C: SIGHT
Drawee 42D: METITA BANK LTD.,FINLAND
PartialShipments 43P: Allowed
Transshipment 43T: Allowed
LoadinginCharge 44A: SHANGHAI
ForTransportto ... 44B: HELSINKI
Shipment Period 44C: LATEST DEC 26th,2011
Descript. of Goods 45A:
TRANGLE BRAND 3U—SHAPE ELECTRONIC ENERGY SAVING LAMP,
TR—3U—A 110V 5W E27/B22 5000PCS USD2.50/PC
TR—3U—A 110V 7W E27/B22 5000PCS USD3.00/PC
TR—3U—A 110V 22W E27/B22 5000PCS USD3.80/PC
TR—3U—A 110V 26W E27/B22 5000PCS USD4.20/PC
CIF HELSINKIAS PER S/C 04SGQ468001 DD 15, Nov., 2011
Documents required 46 A:
+COMMERCIAL INVOICE IN 5 COPIES.
+PACKING LIST IN 5 COPIES.
+FULL SET OF 3/3 ORIGINAL CLEAN ON BOARD MARINE BILLS OF LADING,MADE OUT TO ORDER, MARKED“FREIGHT PREPAID”AND NOTIFY APPLICANT.
+GSP CERTIFICATE OF ORIGIN FORM A, CERTIFYING GOODS OF ORIGIN INCHINA,ISSUED BY COMPETENT AUTHORITIES.
+INSURANCE POLICY/CERTIFICATE COVERING RISKS F.P.A OF P.I.C.C. lNCLUDINGWAREHOUSE TO WAREHOUSE CLAUSE UP TO FINAL DESTINATION AT HELSINKI,FORAT LEAST 110 PCT OF CIF—VALUE.
+SHIPPING ADVICES MUST BE SENT TO APPLICANT WITHIN 2 DAYS AFTERSHIPMENT ADVISING NUMBER OF PACKAGES,GROSS & NET WEIGHT,VESSEL NAME, BILL OF LADING NO. AND DATE, CONTRACT NO., VALUE.
+BENEFICIARY'S CERTIFICATE CERTIFYING THAT ONE COPY EACH OFINVOICE, N/N B/L HAVE BEEN FAXED TO BUYER TO FAX NO. +1 [250] 8285155 WITHIN 3 DAYS AFTER SHIPMENT.
Addition Cond. 47 A:
IF BILLS OF LADING ARE REQUIRED ABOVE, PLEASE
FORWARD DOCUMENTS IN TWO MAILS ORIGINALS SEND
BY COURIER AND DUPLICATES BY REGISTERED AIRMAIL.
Details of Charges 71 B: BANK CHARGES EXCLUDING ISSUING
BANKS ARE FOR ACCOUNT OF BENEFICIARY.
Presentation Period 48 : DOCUMENTS TO BE PRESENTED WITHIN
15 DAYS FROM SHIPMENT DATE
Confirmation *49 : WITHOUT
Instructions 78 :
DISCREPANT DOCUMENTS,IF ACCEPTABLE, WILL BE SUBJECT TO A
DISCREPANCY HANDLING FEE OF USE 50.00 OR EQUIVALENT WHICH
WILL BE FOR ACCOUNT OF BENEFICIARY.
SPECIAL NOTE: A/C OF BENEFICIARY (UNLESS OTHERWISE STATED)
AT APPROPRIATE LIBOR RATE PLUS 1.00 PER CENT MARGIN.
Send To ReC. Info. 42 : THIS CREDITIS ISSUED SUBJECT TO
2007 REVISION,I.C.C. PUBLICATIONS
NO. 600
Trailer Order is <MAC:> <PAC:> <ENC:>
<CHK:> <TNG:> <PDE:>
MAC: ID20750E
CHK: 5044662F74BC
设X服从参数为λ的指数分布,当k<X≤k+1(k=0,1,2,…)时,令Y=k,求E(Y).
连续型随机变量X的密度函数为
其中μ,σ(σ>0)为参数,则称随机变量X服从______分布,记作______;当μ=0,σ=1时,密度函数为f(x)=______,这种正态分布称为______分布,记为______.