Ⅰ 在城市里TXT网盘资源链接或者下载方法
链接:https://pan..com/s/1lwQi4tbfhtaIcMYt4pUzNA
Ⅱ 橡胶配方怎么配
配方设计,就是根据产品的性能要求和工艺条件合理地选用原材料,确定各种原材料的用量和配比关系。橡胶材料是生胶与多种配合剂构成的多相体系,橡胶材料中各个组分之间存在着复杂的物理和化学作用。目前尚不能用理论计算的方法确定各种原材料的配比,也不能确切地推导出配方和物理性能之间的定量关系。在一定程度上仍依赖于长期积累的经验。
工具/原料
橡胶、活化剂、促进剂、硫化剂、防老剂、填料、增塑剂、补强剂等。
密炼机、开炼机、硫化机、橡胶物化性能测试试验机等。
方法/步骤
1
根据样品试用要求、物化指标等现有的条件推断橡胶品种,根据工程师的经验设计出相对应的试验配方。
列出配方,精确称量各种小料的重量,按工艺条件成放到不同容器里面带混炼试用。
2
按工艺条件要求,密炼、开练的投料顺序、温度、试验严格按照工程师设计配方要求操作,待停放硫化使用。
硫化:时间、温度、压力。三要素要控制好,按设计要求正确硫化,停放待检测物化性能。
3
通过测试配方设计出来试片,来检测待给数据是否满足现有成品使用要求和物化性能。
待全部满足物性才算合格的配方,在此之间工程师可能重新设计几个配方直至满足样品要求。
注意事项
充分注意这种交互作用,在试验设计时,尽可能周到的考虑它的作用和影响, 甚至可以把它作为一个因子去处理。 避开交互作用的大因子,把一对交互作用大的因子,分别安排在不同的两组实验中,使同组试验的因子保持相对的独立性,避免了强烈交互作用的干扰,从而使数据分析简单容易。
1. 设计配方应在多个方面综合考滤,1.确保指定的物性。所谓物性大体是在如下几个方面拉伸强度、撕裂强度、定伸应力、硬度、磨耗、疲劳与疲劳破坏、回弹力、扯断伸长率等。 2.胶料加工过程中,性能优良,确保产品高产、省料。 3.成本低价格便宜。 4.所用的原材料很易采购到。 5.生产力高,加工方便,制造过程中能耗少。 6.符合环保及卫生安全要求。
Ⅲ 汉译英(追加20分)
Household use LPG, gas and other combustible gas as fuel for more and more, but these harmful gases, explosive, hidden accidents, such as gas leakage can not discover and deal with family and neighbors would bring catastrophic harm. This design includes combustible gas alarm circuit structure and working principle. The alarm circuit to the semiconctor gas sensors as the main component of the semiconctor gas sensor to detect combustible gas to control by changing the conctivity of multi-harmonic oscillator and intermittent positive feedback oscillator work to achieve the alarm through the alarm circuit purpose.
With the development of petrochemical instry, flammable, explosive gas type and scope of use are increased. These gases in the course of the event of a leak, and air mixture will cause a fire. As the gas diffusion inherent nature of the leak, the effect of external wind, gas experience can spread rapidly along the surface, expanding hazard area. The event of a combustible gas leakage, timely and reliable to detect the air concentration of combustible gases Di, Jin Xing promptly take effective measures to remedy, to take Zhengque the Chufangfa, recing leakage Yinfa the accident, is to avoid casualties caused Chongtaicaichan He essential.
Ⅳ 求:JAVA程序员面试题
哎 我应聘了N家公司 给你一些题好了
华为的
第一部分:选择题
QUESTION NO: 1
1、public class Test {
public static void changeStr(String str){
str="welcome";
}
public static void main(String[] args) {
String str="1234";
changeStr(str);
System.out.println(str);
}
}
Please write the output result :
QUESTION NO:2
1. public class Test {
2. static boolean foo(char c) {
3. System.out.print(c);
4. return true;
5. }
6. public static void main( String[] argv ) {
7. int i =0;
8. for ( foo('A'); foo('B')&&(i<2); foo('C')){
9. i++ ;
10. foo('D');
12. }
13. }
14. }
What is the result?
A. ABDCBDCB
B. ABCDABCD
C. Compilation fails.
D. An exception is thrown at runtime.
QUESTION NO: 3
1. class A {
2. protected int method1(int a, int b) { return 0; }
3. }
Which two are valid in a class that extends class A? (Choose two)
A. public int method1(int a, int b) { return 0; }
B. private int method1(int a, int b) { return 0; }
C. private int method1(int a, long b) { return 0; }
D. public short method1(int a, int b) { return 0; }
E. static protected int method1(int a, int b) { return 0; }
QUESTION NO: 4
1. public class Outer{
2. public void someOuterMethod() {
3. // Line 3
4. }
5. public class Inner{}
6. public static void main( String[]argv ) {
7. Outer o = new Outer();
8. // Line 8
9. }
10. }
Which instantiates an instance of Inner?
A. new Inner(); // At line 3
B. new Inner(); // At line 8
C. new o.Inner(); // At line 8
D. new Outer.Inner(); // At line 8//new Outer().new Inner()
QUESTION NO: 5
Which method is used by a servlet to place its session ID in a URL that is written to the servlet’s response output stream?
A. The encodeURL method of the HttpServletRequest interface.
B. The encodeURL method of the HttpServletResponse interface.
C. The rewriteURL method of the HttpServletRequest interface.
D. The rewriteURL method of the HttpServletResponse interface.
QUESTION NO: 6
Which two are equivalent? (Choose two)
A. <%= YoshiBean.size%>
B. <%= YoshiBean.getSize()%>
C. <%= YoshiBean.getProperty("size")%>
D.
E.
F.
G.
QUESTION NO: 7
Which of the following statements regarding the lifecycle of a session bean are correct?
1. java.lang.IllegalStateException is thrown if SessionContext.getEJBObject() is invoked when a stateful session bean instance is passivated.
2. SessionContext.getRollbackOnly() does not throw an exception when a session bean with bean-managed transaction demarcation is activated.
3. An exception is not thrown when SessionContext.getUserTransaction() is called in the afterBegin method of a bean with container-managed transactions.
4. JNDI access to java:comp/env is permitted in all the SessionSynchronization methods of a stateful session bean with container-managed transaction demarcation.
5. Accessing resource managers in the SessionSynchronization.afterBegin method of a stateful session bean with bean-managed transaction does not throw an exception.
第二部分:概念题
1. 描述Struts体系结构?对应各个部分的开发工作主要包括哪些?
3. JSP有哪些内置对象和动作?它们的作用分别是什么?
4、SQL问答题
SELECT * FROM TABLE
和
SELECT * FROM TABLE
WHERE NAME LIKE '%%' AND ADDR LIKE '%%'
AND (1_ADDR LIKE '%%' OR 2_ADDR LIKE '%%'
OR 3_ADDR LIKE '%%' OR 4_ADDR LIKE '%%' )
的检索结果为何不同?
5、SQL问答题
表结构:
1、 表名:g_cardapply
字段(字段名/类型/长度):
g_applyno varchar 8;//申请单号(关键字)
g_applydate bigint 8;//申请日期
g_state varchar 2;//申请状态
2、 表名:g_cardapplydetail
字段(字段名/类型/长度):
g_applyno varchar 8;//申请单号(关键字)
g_name varchar 30;//申请人姓名
g_idcard varchar 18;//申请人身份证号
g_state varchar 2;//申请状态
其中,两个表的关联字段为申请单号。
题目:
1、 查询身份证号码为440401430103082的申请日期
2、 查询同一个身份证号码有两条以上记录的身份证号码及记录个数
3、 将身份证号码为440401430103082的记录在两个表中的申请状态均改为07
4、 删除g_cardapplydetail表中所有姓李的记录
");