A case study on the combination of HttpUrlConnection and JSON (weather forecast as an example)

1. First, define three textviews (display weather, humidity, wind direction), one editview (to input city) and one Button control in the layout file <EditText android:id="@+id/city_et" android:layout_width="match_parent" android:layout_height="wrap_content" /> <TextView an ...

Posted on Sun, 05 Apr 2020 07:24:10 -0400 by choubix

Setting up ip for linux system

Write ifcfg header files under / etc / sysconfig / network scripts /. Different systems display different files. Change ONBOOT=no to ONBOOT=yes Then restart the network service Execute the service network restart command Use the ifconfig command to view the assigned ip address. [root@localhost ~]# ifconfig ens33: flags=4 ...

Posted on Sun, 05 Apr 2020 02:02:08 -0400 by airwinx

Python implementation and simple application of BP algorithm

First, we use Python to implement a simple neural network algorithm: import numpy as np # Definition tanh function def tanh(x): return np.tanh(x) # tanh Derivative of function def tan_deriv(x): return 1.0 - np.tanh(x) * np.tan(x) # sigmoid function def logistic(x): return 1 / (1 + np.exp(-x)) # sigmoid Derivative of functio ...

Posted on Sun, 05 Apr 2020 00:51:18 -0400 by vipul73

Comparing Class and Structure Performance Test--Taking Encapsulating Network Heartbeat Packet as an Example

Catalog 1. Background 2. Advantages and disadvantages of encapsulating Ethernet heartbeat packets with classes 2.1. Advantages 2.2. Disadvantages 3. Network Heartbeat Packet Encapsulation Class 4. Implement IDisposable interface 5. Application-tier Calls 6. Testing the effectiveness of the Dispose() method 7. Test Performance Comparison 8. ...

Posted on Sun, 05 Apr 2020 00:17:34 -0400 by konnwat

Load balancing problem of Logu P4016 (minimum cost and maximum flow)

Title Description GG company has nn warehouses arranged in a circular way along the railway transportation line, and the quantity of goods stored in each warehouse varies. How to use the minimum handling quantity can make the inventory quantity of nn warehouses the same. When carrying goods, they can only be carried between adjacent warehouses ...

Posted on Sat, 04 Apr 2020 15:28:35 -0400 by timbo6585

producer of kafka manometry

background Recently, we built a large data platform by ourselves. Due to time problems and tight schedule, we could not measure the platform.Now that the platform is built, it is planned to test the platform components one by one. Welcome to correct, don't spray! Pressure Target Tests the ability of the Kafka cluster to write and consume messag ...

Posted on Sat, 04 Apr 2020 11:37:12 -0400 by yogicasey

Upload and preview pictures, audio and video files

Recently, we are uploading pictures and audio-video. The stream plug-in is used for uploading, which is easy to use. But before uploading, we need to preview the uploaded pictures and audio-video to determine whether to delete some uploaded files. First, look at the code: Address of stream upload plug-in: http://www.t ...

Posted on Sat, 04 Apr 2020 08:25:37 -0400 by mamuni

Simple use of hystrix and dynamic configuration update

Simple use of hystrix and dynamic configuration update Summary It only introduces the simple use of synchronization mode, which is helpful for fast access. There will be some details not mentioned in the official documents Default mode HelloWorld! public class CommandHelloWorld extends HystrixCommand<String> { private final String na ...

Posted on Sat, 04 Apr 2020 08:23:45 -0400 by accident

HTTP URL and JSON to create a cute weather report (with code)

When we are familiar with HTTP request and JSON; create a weather report to deepen it; Search through the Web: windy weather and register a user In the development options of the official website, select the URL of the ordinary user in the API description document; You can see our key in the console. Next Let's ...

Posted on Sat, 04 Apr 2020 05:23:21 -0400 by svivian

Using Tensorflow to realize convolutional neural network CNN

1, Data preparation MNIST data set is used for the experimental data. MNIST data set has been a "chewed" data set. Many tutorials will "start" on it, almost becoming a "model". In many tensorflow tutorials, download the mnist dataset with the following sentence: mnist = input_data.read_data_sets('MNIST ...

Posted on Sat, 04 Apr 2020 03:09:19 -0400 by JAY6390