动物识别专家系统实验报告.doc

题目：动物识别专家系统一 实验目的理解和掌握产生式只是表示方法，能够用选定的编程语言实现产生式系统的规则库。二 实验内容（1） 以动物识别系统的产生式规则为例。（2） 用选定的编程语言建造规则库和综合数据库，并能对它们进行增加、删除和修改操作。三 实验原理动物识别专家系统是流行的专家系统实验模型，它用产生式r来表示知识，共15条r、可以识别七种动物，这些r既少又简单，可以改造他们，也可以加进新的r，还可以用来识别其他东西的新r来取代这些r。动物识别15条r:r1： IF 动物有毛发 THEN 该动物是哺乳动物r2: IF 动物能产奶 THEN该单位是哺乳动物r3: IF 该动物有羽毛 THEN该动物是鸟r4: IF动物会飞 AND会下蛋 THEN该动物是鸟r5: IF动物吃肉 THEN该动物是肉食动物r6: IF动物有犬齿 AND有爪 AND眼盯前方 THEN该动物是食肉动物r7: IF动物是哺乳动物 AND有蹄 THEN该动物是有蹄动物r8: IF动物是哺乳动物 AND是反刍动物 THEN该动物是有蹄动物r9: IF动物是哺乳动物 AND是食肉动物 AND是黄褐色的 AND有暗斑点 THEN该动物是豹r10： IF动物是黄褐色的 AND 是哺乳动物 AND 是食肉 AND 有黑条纹 THEN该动物是虎r11： IF动物有暗斑点 AND 有长腿 AND 有长脖子 AND 是有蹄类 THEN该动物是长颈鹿r12： IF动物有黑条纹 AND 是有蹄类动物 THEN该动物是斑马r13： IF动物有长腿 AND 有长脖子 AND 是黑色的 AND 是鸟 AND 不会飞THEN该动物是鸵鸟r14： IF动物是鸟 AND 不会飞 AND 会游泳 AND 是黑色的 THEN该动物是企鹅r15： IF动物是鸟 AND 善飞 THEN该动物是信天翁四 推理树部分推理树如下：长颈鹿长脖子长腿暗斑点有蹄类斑马黑条纹有蹄哺乳嚼反刍动物有毛发有奶r11r12r8r7r1r2五 代码程序是用java编写的规则对象代码：public class Rule private ArrayList premise = new ArrayList();private int result;public void addPremise(int item) premise.add(item);public int size() return premise.size();public int getPremiseAt(int index) return premise.get(index);public void setResult(int result) this.result = result; public int getResult() return result;规则库代码如下：public class RuleBase private ArrayList rules = new ArrayList();public int size() return rules.size();public RuleBase() init();public void addRule(Rule rule) rules.add(rule);public Rule getRuleAt(int index) return rules.get(index);public void init() Rule rule1 = new Rule();rule1.addPremise(0); rule1.setResult(20);rules.add(rule1);Rule rule2 = new Rule();rule2.addPremise(1); rule2.setResult(20);rules.add(rule2);Rule rule3 = new Rule();rule3.addPremise(2); rule3.setResult(21);rules.add(rule3);Rule rule4 = new Rule();rule4.addPremise(3); rule4.addPremise(13); rule4.setResult(21);rules.add(rule4);Rule rule5 = new Rule();rule5.addPremise(19); rule5.setResult(22);rules.add(rule5);Rule rule6 = new Rule();rule6.addPremise(4); rule6.addPremise(15); rule6.addPremise(12); rule6.setResult(22);rules.add(rule6);Rule rule7 = new Rule();rule7.addPremise(20); rule7.addPremise(9); rule7.setResult(23);rules.add(rule7);Rule rule8 = new Rule();rule8.addPremise(20); rule8.addPremise(18); rule8.setResult(23);rules.add(rule8);Rule rule9 = new Rule();rule9.addPremise(20); rule9.addPremise(22); rule9.addPremise(14); rule9.addPremise(11);rule9.setResult(24);rules.add(rule9);Rule rule10 = new Rule();rule10.addPremise(20); rule10.addPremise(22); rule10.addPremise(11); rule10.addPremise(5);rule10.setResult(25);rules.add(rule10);Rule rule11 = new Rule();rule11.addPremise(23); rule11.addPremise(6); rule11.addPremise(7); rule11.addPremise(14);rule11.setResult(30);rules.add(rule11);Rule rule12 = new Rule();rule12.addPremise(23); rule12.addPremise(5); rule12.setResult(26);rules.add(rule12);Rule rule13 = new Rule();rule13.addPremise(21); rule13.addPremise(6); rule13.addPremise(17); rule13.addPremise(7);rule13.setResult(27);rules.add(rule13);Rule rule14 = new Rule();rule14.addPremise(21); rule14.addPremise(10); rule14.addPremise(17); rule14.addPremise(8);rule14.setResult(28);rules.add(rule14);Rule rule15 = new Rule();rule15.addPremise(21); rule15.addPremise(16); rule15.setResult(29);rules.add(rule15);综合数据库代码如下：public class Database ArrayList db = new ArrayList();public void addFact(int item) db.add(item);public boolean contains(int item) return db.contains(item);控制系统代码如下：public class Machine public static String inference(Database db) RuleBase ruleBase = new RuleBase();int result = 0;for (int i = 0; i ruleBase.size(); i+) int size = ruleBase.getRuleAt(i).size();boolean flag = true;for (int j = 0; j = 24) result = fact;break;switch (result) case 24:return 金钱豹;case 25:return 老虎;case 26:return 斑马;case 27:return 鸵鸟;case 28:return 企鹅;case 29:return 信天翁;case 30:re