1. The five functions of money are as follows:
1, the function of value scale
specific performance: to price and price all kinds of goods in life to measure the value of goods, and the money to measure the value of goods itself is also a commodity with value
2. The function of circulation means: in the process of commodity exchange, commodity sellers convert commodities into money, and then use money to buy commodities. Here, money plays the role of medium of exchange and performs the function of means of circulation. Popular will be the act of buying and selling, hand in money, hand delivery
3. Storage function
specific performance: money withdraws from the circulation field and acts as an independent form of value and the general representative of social wealth, such as the first, second and third generation of RMB, or other commemorative coins
4, the function of means of payment
specific performance: as an independent form of value, currency performs the functions of unilateral movement (such as debt repayment, tax payment, wage and rent payment, etc.), such as interest payment, wage payment, rent payment, tax payment, etc
The function of world currency is embodied in the following aspects: currency performs the function of general equivalent in the world market. Due to the occurrence and development of international trade, the currency circulation goes beyond the scope of a country and plays a role in the world market, so the currency has the function of world currency. For example, the US dollar is the world currency
2. Android 5.0 runs in art mode by default, but keeps Dalvik mode. That is to say, why do you see these two folders
for more information, please refer to the introction of Android 5.0 on the Internet: http://ke..com/item/Android%205.0? fromtitle=%E5%AE%89%E5%8D%935.0&type=syn
3. Android is an open source operating system based on Linux. One of the core contents of Android is DVM, namely Dalvik virtual machine. It differs from the traditional JVM in Architecture: the former is based on reg (in CPU) and the latter is based on stack (in memory). The most significant difference is that the former can effectively rece the number of memory access to speed up the execution of the program
others, such as can be optimized in advance, speed up the compilation, because temporarily do not understand the principle of compilation, can not understand
2. Different bytecodes are executed. The former is in dex format and the latter is in. Class format. DEX is optimized for mobile devices
Technorati tag: Android
3. DVM can run multiple VM entities at the same time and exist in independent processes. What about the JVM? Feeling also exists in the process of independence.. There is no deep understanding yet.. I'll add later< br />
4. DVM makes more use of Linux system to complete the management of processes and threads, because the thread in DVM is a thread in Linux and depends on the system to manage threads
for more information, you can go to the sharing source writer: http://blog.csdn.net/yujun411522/article/details/45932247 This article is from: Yujun 411522's blog
4. DVM refers to dalivk's virtual machine. Each Android application runs in its own process and has a separate Dalvik virtual machine instance. Every DVM is a process in Linux, so it can be considered as the same concept< br /> < br /> What is Android DVM: Dalvik is a Java virtual machine designed by Google for Android platform. Each Dalvik application is executed as an independent Linux process. Independent processes can prevent all programs from being shut down when the virtual machine crashes< br /> < br /> The difference between Dalvik and Java runtime environment 1: Dalvik is mainly used for object lifecycle management, stack management, thread management, security and exception management, garbage collection and other important functions< br /> 2: Dalvik is responsible for process isolation and thread management. Each Android application corresponds to an independent Dalvik virtual machine instance at the bottom, and its code is executed under the interpretation of the virtual machine< br /> 3: Unlike Java virtual machine running Java bytecode, Dalvik virtual machine runs its proprietary file format DEX 4: DEX file format can rece the overall file size and improve the speed of class search in I / O operation< br /> 5: ODEX is to further improve the performance in the process of running, and further optimize the DEX file< br /> 6: All threads of Android applications correspond to a Linux thread, so virtual machines can rely more on the thread scheling and management mechanism of the operating system 7: There is a special virtual machine process, zygote, which is the incubator of virtual machine instances. It will be generated when the system starts. It will complete the initialization of virtual machine, loading of library, prefabrication of class library and initialization. If the system needs a new virtual machine instance, it will quickly itself and provide the fastest data to the system. For some read-only system libraries, all virtual machine instances share a memory area with zygote.
5. The maximum value is 999, which proves that it is a three bit DVM. There is something wrong with the title. The minimum range should be 1V, resolution = range / maximum display number, resolution = resolution / range
6. When installing prison break, it is suggested that LZ shut down all anti-virus software... Otherwise, the anti-virus software will be killed by mistake... Because most of the anti-virus software provided by vagrant is pirated
I downloaded it yesterday, and the installation is successful
7. The problem with Samsung air conditioner E101 is that the voltage is too high or too low
8. Unknown_Error
9. The network knows that most of the respondents are good at the original version of all kinds of questions
in this case, it is recommended that you go to some professional Q & A areas to get strategies
there are many channels, such as the Internet Mac BBS