0-57404-2C /57C404B

：（同号）/，

大量现货，价格合理，当天打款，当天顺丰，即日到货。
1、华东地区（包括山东、江苏、安徽、浙江、福建、上海）； 
2、华南地区（包括广东、广西壮族自治区、海南）； 
3、华中地区（包括湖北、湖南、河南、江西）； 
4、华北地区（包括北京直辖市、天津直辖市、河北、山西、内蒙古自治区）；
5、西北地区（包括宁夏回族自治区、新疆维吾尔自治区、青海、陕西、甘肃）； 
6、西南地区（包括四川、云南、贵州、西藏自治区、重庆直辖市）； 
7、东北地区（包括辽宁、吉林、黑龙江）； 
8、台港澳地区（包括中国台湾、香港、澳门）。
 
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1. 引言
PID（比例-积分-微分）控制器作为zui早实用化的控制器已有50多年历史，因其具有算法简单、鲁棒性好、可靠性高、直观性好等优点被广泛的应用于工业过程控制及运动控制中[1]。常规PID控制效果的优劣，不仅仅取决于控制系统模型的精确程度，还必须调整好三个参数的关系，而这种关系不一定是简单的线性组合。实际的工业过程及运动过程往往具有时变性、变参数、变结构等不确定性及很强的非线性，精确的数学模型难以建立，此外，常规PID还有实现在线调整困难，参数间相互影响，参数整定时间长等缺点，难以取得理想的控制效果。0-57404-2C /57C404B
随着控制理论的发展，将应用广泛的PID控制器与智能控制理论相结合[2]成为智能控制研究的新方向，神经网络算法具有逼近任意非线性表达能力，很强的自学习能力和概括推广能力，在解决高度非线性和不确定系统方面有很大的的潜能，应用神经网络，可以从复杂的PID三个参数组合中寻求的线性组合，使神经网络和PID本质结合。从而使得控制器具有较好的自适应性，实现参数的自动实时调节，适应过程的变化，提高系统了的鲁棒性和可靠性。
2. BP神经网络
2.1 BP神经网络的构成及设计[3]
BP神经网络是一种具有三层或三层以上的神经网络，包括输入层、隐含层、输出层，上下层之间实现全连接，而每层神经元之间无连接。当一对学习样本提供给网络后，神经元的激活值从输入层经各中间层向输出层传播，在输出层的各神经元获得网络的输入响应。接下来，按照减少目标输出与实际误差的方向，从输出层经过各中间层逐层修正各连接权值，zui后回到输入层，这种算法即BP算法。随着这种误差逆的传播修正不断进行，网络对输入模式响应的正确率也不断上升。
（1）输入输出层的设计
输入层的设计可以根据需要求解的问题和数据表示方式确定，若输入信号为模拟波形，那么输入层可以根据波形的采样点数目撅腚输入单元的维数，也可以用一个单元输入，这是输入样本为采样的时间序列。输出层的维数可以根据使用者的要求确定。如果BP网络用作分类器，类别模式一共有m个，那么输出层神经元的个数为m或者。
（2）隐层的设计
隐层单元的数目与问题的要求、输入/输出单元的数目都有直接的关系，隐单元的数目太多会导致学习时间过长、误差不一定，也会导致容错性差、不能识别以前没有的样本等等，因此，一定存在一个
1），其中k为样本数，n为输入单元数。
2），其中m为输出神经元数，n为输入单元数，a为[1,10]之间的常数。
3），其中n为输入单元数。
2.2 典型神经网络结构

Cisco 9' DTE Cable AMP Female Connector to 50 Pin Male C (72-0740-02)

Sequent SPIB Interface Card (SPIB-0000)

Hoke-Phoenix 2-Gauge Gas Flow Regulator (901A)

Sim Ware 16 Port Token Ring (SW-S16RRR)

80 Data Ram Card ISA (386/8MB)

HP Serial/parallel Module (A-3210-48)

In P4 2.8GHz/512/533/?1.525V Socket 478 CPU (SL6PF)

IBM Token-Ring 16/4 PC Card W/Cable (92G9352)

IBM 300W Power Supply - Astec SA300-3400 (7160044)

Network Video Technologies Vicor Twisted Pair Video Transceiver Card (518AR)

In 1.70 GHz Celeron Processor (SL6BC)

Oriental Reversible Motor 100V 50/60Hz w/ 3GK90K Gear Head (1987-434~Q1)

Rackmount PBX Connectors Rackmount (Gold)

Racal-Datacom Excalibur T1 DSU CSU Multiplexer pn 15-31A1001101A - No AC Adapter

EPSON J232A Flatbed color scanner

HP 4 plug AdvanceStack (J2602A)

Hewlett Packard Rack Mount Kit E60 E800 (J1469A)

Engage Communications Router Apple Talk R3232 DDS V35 (SyncRouter LT)

Digital Electronics DEC 254W AT Power Supply - Delta MP-254AB (30-37197-01)

Digital SDI Cable 25 Foot (BC26V-25)

Lucent Black ephone - MLX-10DP (107959702)

Sysgen Sysgen Smart QIC File Tape Drive 110 V (QIC-File 60)

In 9600EX External Modem (9600BPS)

Data General PS/2 Keyboard Black Sliders (6311-K)

Digital Electronocs 230W AT Power Supply (SMP-230BB)

Han One Power Supply (HN-2130)

Umax Astranet Color Flatbed Scanner (A101)

General Electric Light Valve 4.9 to 1 Lens for CRT Projector (FI-130)

Hitachi 139-0150 Filter Compartment

Homaco, Inc T-1 Demarcation Patch Panels-One Rack Space (MJP19-627CRU-V?)

IBM Port Replicator for IBM Thinkpad 380Z / 560Z (05K6160)

Welch Allyn AC Adapter 5.1VDC 750mA 20W (PS5/C)

IBM Selectabas Dock Enabler for Thinkpad (11J9013)

Jetbook Laptop Keyboard Solo (KR-26EA)

Universal Computer Systems ANSI Terminal Keyboard (DCS/948)

HP CD-RW IDE Internal 4x6 CD-Writer Plus 7200 Series (C4380-56000)

NEC Superscript 870 Main Controller (136-532833-001?)

Western Digital Controller Card (WD1005-WAH)

Idea Associates 8 Bit Parallel/Serial Card (100-027-004)

Cdc 71MB 5.25" HH IDE HDD (94204-71)

Transat Salite Receiver 24 Channel (2M7)

Valcor Solenoid Valve - New Open Box (51C56T34-3)

Daewoo Processor Board (991A1200)

Prism Data Systems Inc. Controller Card (AT16-03)

Zenith 16 Bit ISA CPU/Memory Board (85-3360-02)

Western Digital 16BIT ISA MFM Controller Card 60-000107-11 (WD1003-WA2)

Advanced EDM Automation 50 Slap Fixture AMC Stock (583465)

ATI 3D Rage II Mach64 GT PCI 2MB (109-38200-00)

Compact Air Products Pneumatic Guided Cylinder (GC23X12)

Parker PTFE FluidConnectors (ZZ-102B)

Dataram SD Server RAM (60106-99302)

Dualtec Intrusion Motion Detector, IR and RF (C2DualtecVII)

Dataram SD Server RAM (60106-99281)

Dataram SD Server RAM (60106-99280)

Dataram SD Server RAM (60106-99267)

Dataram SD Server RAM (60106-99268)

Dataram SD Server RAM (60106)

Western Digital FASST2 SCSI Controller 16-Bit (WD7000-ASC)

Sceptre AC Adapter Round 5-Pin 31 Watt (ML-6522-1)

NEC Four Circuit Trunk Card with Disconnect Supervisio (4COTB)

Zenith Memory Expansion Board 181-6364-2C-1 (85-3260-02)

Spindler & Hoyer Mirror Laser Precision (NL)

Generic 32MB Compaq Armada Laptop Memory 2 pc. Kit (Name Brand)

Zenith IO ISA Board for 286 / 386 Computer 16-Bit (85-3240-01)

Team Technology SmarTEAM Data 2400 Baud Modem - no AC Adapter (2400)

LUFRAD Proximity Switch (SLC-2-D-s)

HP Main Motor from LaserJet 5000 Printer (RH7-1357)

Generic Microscope Lamp 15V/150W= 10A (Black)

Data Products Serial I/F (260674-002)

HP Network Analyzer Quick Reference Guide (8752C)

Intermec Janus 2020 Hand-Held Data Collection Computer User (062366)

Azure Technologies Ethernet 2 Card (004057)

HP FDDI Fiber Card (4811-DAAS-MM-S?T-128)

HP A2874-66005 SCSI Card (A-3552-SC)

Agilent Technologies ESA Spectrum Analyzers Reference Guide (E4401-90237)

Toshiba Dot Matrix Printhead (P1340)

Maxconn Controller Card (MM58167A)

Nvidia MX400 PRO-T Video Card (MS-8826)

A-VAC Vacuum Sensor (51-1500-01)

SSAC Time Delay - Solid State - 10A Res 120VAC 1-100 Mi (KRD 1324)

RasterOps Mac Video Board (8/24 XLi)

NMB 270W Power Supply from Sony VAIO PCV-RX series (MJPC-270A1)

Maxtor 23.0GB 3.5" IDE Hard Drive (92305U3)

Irwin 20 MB Internal 5.25" Tape Drive (125)

Apple 150W Power Supply for Power Mac (614-0039)

Snap Systems Model 4 POS Point-of-sale for School Cafeteria's (4)

Cabletron Cabletron 10BT TP Module Enterasys (TPMIM-T3)

Homaco, Inc Homaco Modular Jack Panel (MJP19-4-25CRE)

Sejun Wireless Keyboard SWK-8697WT (SPR-8697WT6A)

NEC External Relay Card (DK00)

Kacer AT Power Supply for IBM 8525 (KCO-100T-2)

Ultra Tek 130W AT Power Supply (UTS 130-01)

Tie/Communicati?ons HX DSS Console 56 Button (86115)

Cisco 10" DTE Male Cable (72-0671-02)

Phillips Controller Card (SPE142-002)

Phillips Controller Card (SPE-142-003)

Hyundai 1200 bps Modem (HMD-1202)

IBM Dot Matrix Ptrinthead (5182)

Dixon Mini Regulator 1/4 Inch 22 CFM with Gauge (R07-200-R)

Motorola 10 MBPS Elan Card Ethernet Codex 70967-01 (70968G01)

SynOptics Lattisnet 920-167B Token Ring STP/UTP Host Module (3502B)

Att/Lucent/Avay?a 8 Port Digital Card (TN754)

Brother PC Label Printer (QL-500)

Nor / Meridian Network Card - Black Trim (QPC414B)

Microcom DeskPorte 14.4S 14,400 bps Modem New in Box (103603006A)

AST CPU Memory Processor Board (AST 202403-002x11)

Buhler 48 Volt DC Motor (1.13.043.107)

Shinano Kenshi Stepper Motor with Gear Assembly (127K94840)

AST 386SX-20 Processor Board (202438-001X5)

Dell 9GB hard drive SCSI (93310)

Microcom DeskPorte 14.4S 14,400 bps Data/ Modem (103603006A)

Micropolis 331MB SCSI HARD Drive (1578)

Mitsubishi 5.25" Internal Floppy Disk Drive (M4851A-352U)

AST 8-Bit 486 Processor/ memory Board (202397 010 A)

AST RAMPAT-512 RAMPAGE AT MEMORY BD (202079)

Hengstler Print Head, Hecon 24DC D1 (GO685746)

DEI Asynchronous Data Set (ADT 2)

Gems Flow Switch - FS-4, Ryton, SPDT, 0.75 GPM (122355)

Superior Electric SLO-SYN Synchronous Stepping Motor (M063-FC06)

Custom Electronic Shutter Controller (110 VAC)

Buhl Optical Purple Lens (7 x 3 x 3)

Okidata Board (4YA4021-1051)

Microcom External Modem AX/2400C - Missing the light cover (AX2400C)

Virginia KMP Corp Stainless Steel Vibration Absorber (VAB-13SS)

NEC 16-Button Speakerphone with LCD Display (ETJ-16DD-1(BK)?)

Western Digital 15.3GB 3.5" IDE Hard Drive (AC315300-00DV)

Compaq 540MB 3.5" SCSI HH Drive 50 Pin - C2244 (142038-001)

Western Digital 500.0GB 3.5" SATA Caviar SE16 Hard Drive (WD5000AAKS)

Quantum 18.2GB 3.5" SCSI HH Hard Drive 80 Pin - New (18.2W)

Quantum 18.2GB 3.5" SCSI HH Hard Drive 68 Pin (18.2W)

IBM 18.2GB Hard drive (18P3546)

Quantum 18.2GB 3.5" SCSI HH Hard Drive 80 Pin (18.2J)

IBM 540MB Laptop Hard Drive - DHAA-2540 (06G6593)

Dell 20.5GB 3.5" IDE Hard Drive - Quantum (35NTD)

Fujitsu 4.3GB 3.5" IDE Hard Drive (MPD3043AT)

Dell 15.3GB 3.5" IDE Hard Drive - Maxtor 51536U3 (89FXR)

Samsung 4.3GB 3.5" IDE Hard Drive (SV0432A)

Samsung 2.1GB 3.5" IDE Hard Drive (WN321620A)

Dell 20.0GB 3.5" IDE Hard Drive - Hitachi 07N8134 (2M919)

Toshiba 2167MB Laptop Hard Drive (MK2101MAN)

Compaq 30.0GB 3.5" IDE Hard Drive - Quantum 30.0AT (168628-001)

Quantum 7.5GB 3.5" IDE Hard Drive (7.5AT)

Compaq 9.1GB 3.5" SCSI Hard Drive 7200 RPM 80 Pin - Fujit (313720-001)

Quantum 18.2GB 3.5" SCSI Hard Drive 80 Pin (18.2J)

Becton Dickinson Guardian One-Piece Sharps Collector 5 G Lot of 2 (305491)

Sun Power Supply for E4000/E5000 (300-1260-03)

Delta Electronics 103W Power Supply - Vintage (DPS 100BB)

Torrington 1" Bore 2 Bolt Pillow Block Non Expansion Ball Bearing

Allen-Bradley Photo Switch Ser A with Cord (42GRP-9062)

Lenovo T60 R60 Z60 Thinkpad Laptop Mini Dock Type 2505 Port Replicator (42W4601)

US Robotics 33.6 ISA Modem Gateway 2000 epath 1.012.0478-B (87173102)

Farallon LC Card Mac Ethernet (897067-80)

AST 16/8 Bit ISA Fastram Mem Expansion Board (202146-003)

Zebra Module (403520G-091P)

Trident 32 Bit 15 Pin Video Card TGUI9400CXi (VGA-9400C)

IBM 20" V.24 Cable 3174 5394 RS232 2 Switch (53F4779)

Practical Peripherals PM9600 V/32V/42bis Internal Modem ISA 1991 (A1013200)

Zoom ISA14.4 /Modem Card (VFPV32BIS)

US Robotics Sportster 14.4 V32b/V42b Vintage ISA Modem (00027600)

Practical Peripherals Pocket Modem ISA (2400)

IBM Modem 1-532-01244-307 (SM-24HN/1)

Zoom 1002 Modem 10236109 Card (X5H1-1080K)

Multitech 8 Bit ISA w/Com Port Card (PB85020-5H)

Compaq Advanced VGA Controller Board (EISA) (126656-001)

Epson 3.5 FDD (SMD-280H)

Microcom OfficePorte Voice 33.6 kbps Data/ Modem (180603002A)

Chips I/O BOARD (FHG5UA)

Fisher Superfrost Plus Precleaned Microscope Slides (12-550-15)

Fisher Superfrost precleaned microscope slides (12-550-14)

Zebra Hydride battery pack for CAMEO 3 (CC15294-4)

HP 56K V90 USB Data Modem (UM9800-U)

IBM 36.7GB 3.5" SCSI 10000RPM HDD Ultrastar DDYS-T3695 (07N3200)

Astec 145W ATX Power Supply (ATX145-3485)

Spectra Physics Ion Laser Cavity Air Pump (2200)

In 550 MHz Pentium III Xeon Processor (SL3FK)

Nibco 4 Line Copper Water Manifold (595-Y-66)

Cisco CNM3XEOBRD Router w/ 1DSU T1 No Faceplate (CISCO2610)

Traid Corp Vintage Black Briefcase 17x12x10 (641)

Encore 16 Port Fast Ethernet Stackable Hub (ENH716-TX)

Motorola FT100 M Fractional T1 Unit (6104506100010)

International Power Power Supply (IHD 24 - 4.8)

Media 100 Tutorial and User's Guide 2nd Edition August 1997

HP Power supply 205W (0950-2060)

Narda Microwave Coupler 820 - 900 MHz (3151-20)

Tektronix Dual Time Base with Options Instruction Manual (7B92A)

Browning Sheave (BK85H)

Browning Sheave New Open Box (AK89X1)

Browning Sheave (AK89H)

Wang ISA 16-BIT Network Adapter (9454)

Hewlett Packard OmniBook Mini Dock (F1452A)

In Focus Systems ELECTROBOARD (480CX)

HP Procurve switch 2524 (J4813A)