.
2Data Preparation and technical routes
2.1Lab Area Overview
The sample area of the experiment is the old city of xuchang City, Henan Province. The area is 1.8 square kilometers, with thousands of individual buildings. The ancient and modern buildings in the area coexist, and there is a large area of water and green space, fully reflecting the complexity and diversity of general cities, it is very representative.
2.2Data Source
1) in the old city of xuchang city and its surrounding areas, the
axial direction.The United States uses UTM to prepare military maps and remote sensing satellite images of Earth resources around the world)Map Projection selection is based on the geographical location, contour shape, and map usage of the target region. World Maps usually use three types: Positive cylinder, pseudo cylinder, and multi-cone.Azimuth projection is generally used in circular area.When the east-west direction of the graphic area is extend
to the datum later ).
The Cartesian coordinate system is defined as a "flat" coordinate system following the curvature of the Earth. it's not flat in the sense that it usually follows the Earth's curvature in one direction and has a known scale-error in the other direction relative to the distance of the origin. the most well-known coordinate system is the Universal Transverse Mercator (UTM), but surveyors define their own little local flat coordina
): at android.os.Looper.loop(Looper.java:137)01-01 04:04:44.050 I/dalvikvm( 1724): at android.app.ActivityThread.main(ActivityThread.java:4424)01-01 04:04:44.050 I/dalvikvm( 1724): at java.lang.reflect.Method.invokeNative(Native Method)01-01 04:04:44.050 I/dalvikvm( 1724): at java.lang.reflect.Method.invoke(Method.java:511)01-01 04:04:44.050 I/dalvikvm( 1724): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)01-01 04:04:44.050 I/dalvikvm( 1724): at co
instructions on its wiki page http://wiki.untangle.com/index.php/Main_Page. You can also refer to an article http://www.esecurityplanet.com/views/article.php/3926016/How-to-Protect-an-Entire-Network-with-Untangle.htm I wrote earlier) to learn more and see how to get started.URL: http://www.untangle.com/
EndianEndian provides its free community edition for network and security device software, and provides unified Threat Management (UTM) function. Thi
confined water roof in Heihe Basin1:1 million Heihe Valley grassland map1:1 million Heihe watershed vegetation map1:100,000 Heihe watershed soil map1:250,000 Heihe watershed Soil map1:100,000 zoning map of water resources development and utilization in Heihe watershed3) Remote sensing dataAster Remote Sensing imagery (200 views)AVHRR Data Products: (projection: Latitude and longitude)2002 10-Day NDVI data synthesized in 8km resolution1981-2003 Gimms Datamss/tm/etm+ images for the 80, 90 and 200
encryption system is the American Data Encryption Standard DES, AES (Advanced Encryption Standard) and European Data Encryption Standard IDEA.
In 1977, the US National Bureau of Standards and Regulations officially implemented the US Data Encryption Standard DES, disclosed its encryption algorithm, and approved the use of it for non-confidential organizations and commercial confidential communications. Then DES became the world's most widely used encryption standard. The encryption and decrypti
Reprinted from: Http://blog.csdn.net/oujunli/article/details/9102101#replyFor people engaged in Android development, encountering ANR (application not responding) is a more common problem. In general, if there is a ANR occurrence, the system will generate trace files in the/data/anr/directory, by analyzing the trace file, you can locate the cause of the ANR. There are many reasons for the ANR, such as high CPU usage, no timely response to events, deadlocks, and so on, which shows how to analyze
Https://gqqnbig.me/2015/11/23/net-framework%e7%89%88%e6%9c%ac4-0-30319-asp-net%e7%89%88%e6%9c%ac4-6-118-0/?utm _source=tuicoolutm_medium=referralThe. NET Framework 4.5 is an in-place upgrade that directly upgrades. NET 4.0 instead of co-existing with. NET 4.0. [1]The. NET Framework 4.5 is composed of the common language runtime (CLR) 4.0, some new classes, and the old class's patches, so it Environment.Version still returns 4.0.30319.42000.When you in
When the jquery upload plugin uploadify was used in the previous period, there was always an error 302 the System reporting HTTP error.On-line collection of information, basically, the session value is lost , according to the solution provided by users to modify, the problem is not resolved.So, not to rule out that this is one of the workarounds for solving the 302 error, but I'm going to come up with another solution that takes into account the problem of asynchronous transmission for your refe
1.detached the Cartesian product is produced in the case of the Jion explicit left outer connection query in the crawl strategy Detachedcriteria DC = Detachedcriteria.forclass (topic.class); Dc.add (Restrictions.like ("title", "percent")); Criteria = Dc.getexecutablecriteria (session); Criteria.setfirstresult ((currentpage-1) * pagesize); Criteria.setmaxresults (pagesize); listThe results from the above query under join areThere is a Cartesian product phenomenon, s
occurred while executing the function.(2). The main thread is block: Very obvious threads are locked, this time can be seen by which thread is locked, you can consider optimizing the code. If it is a deadlock problem, it needs to be resolved in a timely manner.(3). Because the time to capture the trace is likely to be time-consuming operation has been completed (ANR--time-consuming operation completed, System catch trace), then the trace is no use, the main thread of the stack is this:
"Main"
two questions:
Which places are running on the main thread?
Not the main thread, where do you do it?
Answer later.2, ANR Analysis 2.1 Get ANR generated trace fileWhen ANR is generated, the system generates a Traces.txt file that is placed under/data/anr/. You can export it locally by using the ADB command:$adb pull data/anr/traces.txt .2.2 Analysis of ANR caused by traces.txt2.2.1 common obstructionThe tracs.txt files obtained are generally as follows:
The following i
, which includes only three types of thread precedence, which is coarse-grained control, as follows:
Public static Final intmax_priority = Ten Public static Final intmin_priority = 5 Public static Final intmin_priority = 1
The thread priority in the Android version uses the setthreadpriority (int priority) and getpriority () in the Android.os.Process class to set and get the thread's priority, which includes the 10-thread priority, The finer-grained control strategy relative to Java is as follo
behind the default code.
3 Why is there still a flow of traffic after the advertisement has been put off?
Now almost all the sites are in the SEM ads, or all kinds of banner ads. If you use the UTM tag for this type of traffic, in the days after the stop to see if Google Analytics also from the SEM or banner traffic. I believe most of them will. And in the end of the period of time, the remaining of these advertising flows are usually relatively
For small and medium-sized LAN, because the network structure is relatively simple, the number of hosts is less, often ignoring the security of the network construction, resulting in hackers and malicious elements can easily invade. Recently, international well-known network equipment manufacturers combined with the technology launched a few suitable for small and medium-sized network security equipment, today we will introduce its unified security Gateway Zywall USG100.
Fig. 1, integrated Tech
Now the industry seems to have a trend that the firewall seems to have no use, anyway, the firewall can not block what attacks. In this year, "Gray Pigeon" and "Panda incense" and other security issues are common, so for users, especially those who have more money for large industry users, more likely to buy some more expensive IDs or IPs solutions. But in fact, the firewall still has its useful, the firewall can also do more, perhaps for many users, there is no need to spend more money to buy I
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