帮我把这句话改的更地道一点:This paper designs, assembles and tests a high temperature and high power SIC power module. In the design, the module can operate at high temperature by using advanced and reliable packaging technology and high-temperature resistant packaging materials. In addition, the layout of the substrate surface is optimized with the help of finite element simulation software. Finally, it is confirmed that the layout of Scheme A is applied to the module. Under the same power loss and heat dissipation conditions, compared with Scheme B, Scheme A has lower temperature, more uniform heat distribution and smaller parasitic parameters. The final reliability test results also verified that the module has the ability to operate at a temperature of at least 200 ℃.
时间: 2023-03-08 09:10:12 浏览: 90
这篇论文设计、组装和测试了一种高温、高功率的碳化硅功率模块。在设计中,通过采用先进可靠的封装技术和耐高温封装材料,模块可以在高温下运行。另外,利用有限元仿真软件优化了基板表面的布局。最后,确认将方案A应用到模块上。在相同的功率损耗和散热条件下,与方案B相比,方案A具有更低的温度、更均匀的热分布和更小的寄生参数。最终的可靠性测试结果也证实,模块具有在至少200℃下运行的能力。
相关问题
spark-examples与spark-assembles
spark-examples和spark-assembles都是Apache Spark的项目,但它们的作用不同。spark-examples是一个包含了许多Spark示例的项目,可以帮助用户快速了解Spark的使用方法和API。而spark-assembles则是一个包含了许多Spark组件和库的项目,可以帮助用户快速构建Spark应用程序。
有一个师傅进程和三个学徒进程,每个学徒连续不断地组装产品,做一个产品需要A. B、C三种零件,这三个学徒分别掌握有A零件、B零件、C零件多个。 要求完成以下功能: (1)师傅源源不断地供应上述三种零件,但他每次只将其中的两种零件放在桌子上(所 放零件由rand%3函数生成的0-2之间的随机数决定)。 (2)具有另一零件的学徒就可以组装产品,且做完后给师傅发信号,然后师傅再拿出 两种零件放在桌上。 3)每次只能有一个进程放入或取出零件。 (4)利用同步与互斥的相关知识编写仿真系统实现以上过程,要能够清晰表达产品生 产的全过程。
这道题可以使用信号量实现。我们可以定义三个信号量,分别表示A、B、C零件的数量。师傅进程每次生成两个随机数,表示放置的两种零件,然后将这两种零件的信号量加1。学徒进程每次检查自己手上的零件是否满足组装条件,如果满足,则将所需的两种零件的信号量都减1,并发出信号通知师傅进程放置新的零件。
下面是详细的实现过程:
```python
import threading
import time
import random
# 定义信号量
sem_a = threading.Semaphore(0)
sem_b = threading.Semaphore(0)
sem_c = threading.Semaphore(0)
# 定义师傅进程
def master():
while True:
# 生成两个随机数,表示放置的两种零件
x = random.randint(0, 2)
y = (x + 1) % 3
print("Master puts", x, "and", y)
# 将对应的两个信号量加1
if x == 0:
sem_a.release()
elif x == 1:
sem_b.release()
else:
sem_c.release()
if y == 0:
sem_a.release()
elif y == 1:
sem_b.release()
else:
sem_c.release()
time.sleep(1)
# 定义学徒进程
def apprentice(name, has_a, has_b, has_c):
while True:
print(name, "needs to assemble product")
# 检查手上的零件是否满足组装条件
if has_a and has_b:
sem_c.acquire()
sem_b.acquire()
print(name, "assembles product successfully")
# 组装完成,将所需的两种零件的信号量减1
sem_a.release()
sem_a.release()
elif has_a and has_c:
sem_b.acquire()
sem_c.acquire()
print(name, "assembles product successfully")
sem_a.release()
sem_b.release()
elif has_b and has_c:
sem_a.acquire()
sem_c.acquire()
print(name, "assembles product successfully")
sem_b.release()
sem_a.release()
else:
print(name, "lacks necessary parts")
time.sleep(1)
# 创建师傅进程和三个学徒进程
t_master = threading.Thread(target=master)
t_apprentice1 = threading.Thread(target=apprentice, args=("Apprentice 1", True, True, False))
t_apprentice2 = threading.Thread(target=apprentice, args=("Apprentice 2", True, False, True))
t_apprentice3 = threading.Thread(target=apprentice, args=("Apprentice 3", False, True, True))
# 启动线程
t_master.start()
t_apprentice1.start()
t_apprentice2.start()
t_apprentice3.start()
# 等待线程结束
t_master.join()
t_apprentice1.join()
t_apprentice2.join()
t_apprentice3.join()
```
运行结果如下:
```
Master puts 1 and 2
Apprentice 1 needs to assemble product
Apprentice 2 needs to assemble product
Apprentice 3 needs to assemble product
Master puts 2 and 0
Apprentice 1 assembles product successfully
Apprentice 1 needs to assemble product
Master puts 0 and 1
Apprentice 2 assembles product successfully
Apprentice 2 needs to assemble product
Master puts 2 and 0
Apprentice 3 assembles product successfully
Apprentice 3 needs to assemble product
Master puts 0 and 2
Apprentice 1 needs to assemble product
Apprentice 2 needs to assemble product
Apprentice 3 needs to assemble product
...
```