Ⅰ 在城市裡TXT網盤資源鏈接或者下載方法
鏈接:https://pan..com/s/1lwQi4tbfhtaIcMYt4pUzNA
Ⅱ 橡膠配方怎麼配
配方設計,就是根據產品的性能要求和工藝條件合理地選用原材料,確定各種原材料的用量和配比關系。橡膠材料是生膠與多種配合劑構成的多相體系,橡膠材料中各個組分之間存在著復雜的物理和化學作用。目前尚不能用理論計算的方法確定各種原材料的配比,也不能確切地推導出配方和物理性能之間的定量關系。在一定程度上仍依賴於長期積累的經驗。
工具/原料
橡膠、活化劑、促進劑、硫化劑、防老劑、填料、增塑劑、補強劑等。
密煉機、開煉機、硫化機、橡膠物化性能測試試驗機等。
方法/步驟
1
根據樣品試用要求、物化指標等現有的條件推斷橡膠品種,根據工程師的經驗設計出相對應的試驗配方。
列出配方,精確稱量各種小料的重量,按工藝條件成放到不同容器裡面帶混煉試用。
2
按工藝條件要求,密煉、開練的投料順序、溫度、試驗嚴格按照工程師設計配方要求操作,待停放硫化使用。
硫化:時間、溫度、壓力。三要素要控制好,按設計要求正確硫化,停放待檢測物化性能。
3
通過測試配方設計出來試片,來檢測待給數據是否滿足現有成品使用要求和物化性能。
待全部滿足物性才算合格的配方,在此之間工程師可能重新設計幾個配方直至滿足樣品要求。
注意事項
充分注意這種交互作用,在試驗設計時,盡可能周到的考慮它的作用和影響, 甚至可以把它作為一個因子去處理。 避開交互作用的大因子,把一對交互作用大的因子,分別安排在不同的兩組實驗中,使同組試驗的因子保持相對的獨立性,避免了強烈交互作用的干擾,從而使數據分析簡單容易。
1. 設計配方應在多個方面綜合考濾,1.確保指定的物性。所謂物性大體是在如下幾個方面拉伸強度、撕裂強度、定伸應力、硬度、磨耗、疲勞與疲勞破壞、回彈力、扯斷伸長率等。 2.膠料加工過程中,性能優良,確保產品高產、省料。 3.成本低價格便宜。 4.所用的原材料很易采購到。 5.生產力高,加工方便,製造過程中能耗少。 6.符合環保及衛生安全要求。
Ⅲ 漢譯英(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程序員面試題
哎 我應聘了N家公司 給你一些題好了
華為的
第一部分:選擇題
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:概念題
1. 描述Struts體系結構?對應各個部分的開發工作主要包括哪些?
3. JSP有哪些內置對象和動作?它們的作用分別是什麼?
4、SQL問答題
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 '%%' )
的檢索結果為何不同?
5、SQL問答題
表結構:
1、 表名:g_cardapply
欄位(欄位名/類型/長度):
g_applyno varchar 8;//申請單號(關鍵字)
g_applydate bigint 8;//申請日期
g_state varchar 2;//申請狀態
2、 表名:g_cardapplydetail
欄位(欄位名/類型/長度):
g_applyno varchar 8;//申請單號(關鍵字)
g_name varchar 30;//申請人姓名
g_idcard varchar 18;//申請人身份證號
g_state varchar 2;//申請狀態
其中,兩個表的關聯欄位為申請單號。
題目:
1、 查詢身份證號碼為440401430103082的申請日期
2、 查詢同一個身份證號碼有兩條以上記錄的身份證號碼及記錄個數
3、 將身份證號碼為440401430103082的記錄在兩個表中的申請狀態均改為07
4、 刪除g_cardapplydetail表中所有姓李的記錄
");