S7300通过DP线连接，需要采集底层PLC的数据

3个回答

Dynamic Programming? 动态编程的问题
Problem Description Dynamic Programming, short for DP, is the favorite of iSea. It is a method for solving complex problems by breaking them down into simpler sub-problems. It is applicable to problems exhibiting the properties of overlapping sub-problems which are only slightly smaller and optimal substructure. Ok, here is the problem. Given an array with N integers, find a continuous subsequence whose sum’s absolute value is the smallest. Very typical DP problem, right? Input The first line contains a single integer T, indicating the number of test cases. Each test case includes an integer N. Then a line with N integers Ai follows. Technical Specification 1. 1 <= T <= 100 2. 1 <= N <= 1 000 3. -100 000 <= Ai <= 100 000 Output For each test case, output the case number first, then the smallest absolute value of sum. Sample Input 2 2 1 -1 4 1 2 1 -2 Sample Output Case 1: 0 Case 2: 1
Dynamic Programming? 动态编程的实现
Problem Description Dynamic Programming, short for DP, is the favorite of iSea. It is a method for solving complex problems by breaking them down into simpler sub-problems. It is applicable to problems exhibiting the properties of overlapping sub-problems which are only slightly smaller and optimal substructure. Ok, here is the problem. Given an array with N integers, find a continuous subsequence whose sum’s absolute value is the smallest. Very typical DP problem, right? Input The first line contains a single integer T, indicating the number of test cases. Each test case includes an integer N. Then a line with N integers Ai follows. Technical Specification 1. 1 <= T <= 100 2. 1 <= N <= 1 000 3. -100 000 <= Ai <= 100 000 Output For each test case, output the case number first, then the smallest absolute value of sum. Sample Input 2 2 1 -1 4 1 2 1 -2 Sample Output Case 1: 0 Case 2: 1
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android scrollview滚动时 差不多 碰到第一个 imageView时 toolbar就会变色 代码很简单 就一个布局文件 加一个activity bug现象：是滚动到一半时 toolbar会变色，为什么？ 布局文件 比较长 但没啥东西 就一个scrollview 里面加了几个imageView imageView 用的是比较大的图片 432x1965的大图 ，主要是为了能更快复现bug 调了好几天 最后把代码清一清，新建了一个activity发现还是能复现 demo_my_test_activtiy.xml ``` <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <include layout="@layout/demo_test_toolbar" /> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:text="热点" android:textSize="20sp" android:textStyle="bold" /> <ImageView android:id="@+id/id_web_image" android:layout_width="200dp" android:layout_height="160dp" /> <Button android:id="@+id/id_btn_test" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/test" /> <ImageView android:id="@+id/zoom_image" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="@dimen/activity_vertical_margin" android:adjustViewBounds="true" android:maxHeight="750dp" android:src="@drawable/qmshtu_v" /> <ImageView android:id="@+id/zoom_image2" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="@dimen/activity_vertical_margin" android:adjustViewBounds="true" android:maxHeight="750dp" android:src="@drawable/qmshtu_v" /> <ImageView android:id="@+id/zoom_image3" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="@dimen/activity_vertical_margin" android:adjustViewBounds="true" android:maxHeight="650dp" /> <ImageView android:id="@+id/image_view_glide" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout> </ScrollView> </LinearLayout> ``` demo_test_toolbar.xml ``` <merge xmlns:android="http://schemas.android.com/apk/res/android" > <!--加了这个 在actionbar 下出现阴影--> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="80dp" android:minHeight="?attr/actionBarSize" android:paddingTop="@dimen/status_bar_height" android:background="#FF00FFEE" > </android.support.v7.widget.Toolbar> </merge> ``` ``` public class MyTestActivity extends AppCompatActivity { @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.demo_my_test_activtiy); } } ``` 整个代码 没干啥事 有没有人遇到过？ 怎么解决 现在发现 这个BUG在红米手机上会出现 但在山寨平板上不会 不知道是不是MIUI特有的问题
Android 手持PDA 如何让扫描到的数据，跟随光标，输入到任意EditText

Dynamic Programming怎么实现的呢
Problem Description Dynamic Programming, short for DP, is the favorite of iSea. It is a method for solving complex problems by breaking them down into simpler sub-problems. It is applicable to problems exhibiting the properties of overlapping sub-problems which are only slightly smaller and optimal substructure. Ok, here is the problem. Given an array with N integers, find a continuous subsequence whose sum’s absolute value is the smallest. Very typical DP problem, right? Input The first line contains a single integer T, indicating the number of test cases. Each test case includes an integer N. Then a line with N integers Ai follows. Technical Specification 1. 1 <= T <= 100 2. 1 <= N <= 1 000 3. -100 000 <= Ai <= 100 000 Output For each test case, output the case number first, then the smallest absolute value of sum. Sample Input 2 2 1 -1 4 1 2 1 -2 Sample Output Case 1: 0 Case 2: 1

constraintlayout居中怎么无法实现？
![图片说明](https://img-ask.csdn.net/upload/201912/02/1575282442_69475.png) ``` <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="10dp"> <androidx.constraintlayout.widget.ConstraintLayout android:id="@+id/left_layout" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/beijing_left_text" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"> <TextView android:id="@+id/left_msg" android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent"/> </androidx.constraintlayout.widget.ConstraintLayout> <androidx.constraintlayout.widget.ConstraintLayout android:id="@+id/right_layout" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/beijing_right_text" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintTop_toBottomOf="@+id/left_layout"> <TextView android:id="@+id/right_msg" android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> </androidx.constraintlayout.widget.ConstraintLayout> </androidx.constraintlayout.widget.ConstraintLayout> ```
Recyclerview嵌套recyclerview的深坑，我坐在Recyclerview这个坑里很久了，仰望天空希望能把我拉上去。

&emsp;&emsp;请问要如何在Anaconda中创建一个同时拥有Python 3.7.4与JupyterLab 1.1.4的环境？ &emsp;&emsp;我在cmd中通过以下命令创建了一个Python 3.7.4环境： ```batch D:\Anaconda3\envs>conda create -n dp python=3.7 WARNING: A directory already exists at the target location 'D:\Anaconda3\envs\dp' but it is not a conda environment. Continue creating environment (y/[n])? y Collecting package metadata (current_repodata.json): done Solving environment: done ## Package Plan ## environment location: D:\Anaconda3\envs\dp added / updated specs: - python=3.7 The following NEW packages will be INSTALLED: ca-certificates anaconda/pkgs/main/win-64::ca-certificates-2019.8.28-0 certifi anaconda/pkgs/main/win-64::certifi-2019.9.11-py37_0 openssl anaconda/pkgs/main/win-64::openssl-1.1.1d-he774522_2 pip anaconda/pkgs/main/win-64::pip-19.2.3-py37_0 python anaconda/pkgs/main/win-64::python-3.7.4-h5263a28_0 setuptools anaconda/pkgs/main/win-64::setuptools-41.4.0-py37_0 sqlite anaconda/pkgs/main/win-64::sqlite-3.30.0-he774522_0 vc anaconda/pkgs/main/win-64::vc-14.1-h0510ff6_4 vs2015_runtime anaconda/pkgs/main/win-64::vs2015_runtime-14.16.27012-hf0eaf9b_0 wheel anaconda/pkgs/main/win-64::wheel-0.33.6-py37_0 wincertstore anaconda/pkgs/main/win-64::wincertstore-0.2-py37_0 ``` &emsp;&emsp;Python 3.7.4被成功安装，但当继续安装JupyterLab时，会出现以下问题： ```batch D:\Anaconda3\envs>activate dp D:\Anaconda3\envs>conda.bat activate dp (dp) D:\Anaconda3\envs>conda install jupyterlab Collecting package metadata (current_repodata.json): done Solving environment: failed with initial frozen solve. Retrying with flexible solve. Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source. Collecting package metadata (repodata.json): done Solving environment: failed with initial frozen solve. Retrying with flexible solve. Solving environment: | Found conflicts! Looking for incompatible packages. ... UnsatisfiableError: The following specifications were found to be incompatible with each other: Package tornado conflicts for: jupyterlab -> tornado[version='!=6.0.0,!=6.0.1,!=6.0.2'] Package jinja2 conflicts for: jupyterlab -> jinja2[version='>=2.10'] Package notebook conflicts for: jupyterlab -> notebook[version='>=4.3|>=4.3.1'] Package nodejs conflicts for: jupyterlab -> nodejs[version='<10'] Package sqlite conflicts for: python=3.7 -> sqlite[version='>=3.25.3,<4.0a0|>=3.26.0,<4.0a0|>=3.27.2,<4.0a0|>=3.28.0,<4.0a0|>=3.29.0,<4.0a0'] Package openssl conflicts for: python=3.7 -> openssl[version='>=1.1.1a,<1.1.2a|>=1.1.1b,<1.1.2a|>=1.1.1c,<1.1.2a'] Package pip conflicts for: python=3.7 -> pip Package jupyterlab_launcher conflicts for: jupyterlab -> jupyterlab_launcher[version='>=0.10.0,<0.11.0|>=0.11.0,<0.12.0|>=0.11.2,<0.12.0|>=0.13.1,<0.14.0|>=0.4.0|>=0.6.0,<0.7.0'] Package subprocess32 conflicts for: jupyterlab -> subprocess32 Package futures conflicts for: jupyterlab -> futures Package jupyterlab_server conflicts for: jupyterlab -> jupyterlab_server[version='>=0.2.0,<0.3.0|>=1.0.0,<2.0.0'] Package vc conflicts for: python=3.7 -> vc[version='14.*|>=14.1,<15.0a0'] ``` &emsp;&emsp;这个是什么问题？如何解决？感觉默认的base环境很庞大，很多东西用不到。但想要使用JupyterLab又不得不安装……
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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <LinearLayout android:layout_width="match_parent" android:layout_height="180dp" android:orientation="horizontal"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentStart="true" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginStart="150dp" android:layout_marginLeft="150dp" android:layout_marginTop="100dp" android:text="用户登陆" android:textColor="@android:color/holo_blue_dark" android:textSize="30sp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="90dp" android:orientation="horizontal"> <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="@+id/editText1" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginLeft="35dp" android:layout_marginStart="35dp" android:text="用户名" android:textSize="25sp" /> <EditText android:id="@+id/editText1" android:layout_width="200dp" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginLeft="40dp" android:layout_marginStart="40dp" android:text="" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="90dp" android:orientation="horizontal"> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="@+id/editText2" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginLeft="35dp" android:layout_marginStart="35dp" android:text="密码" android:textSize="25sp" /> <EditText android:id="@+id/editText2" android:layout_width="200dp" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginLeft="66dp" android:layout_marginStart="66dp" android:text="" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="90dp" android:orientation="horizontal"> <Button android:id="@+id/button5" android:layout_width="100dp" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginLeft="80dp" android:layout_marginStart="80dp" android:text="登陆" /> <Button android:id="@+id/button4" android:layout_width="100dp" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginLeft="45dp" android:layout_marginStart="45dp" android:text="注册" /> </LinearLayout> </LinearLayout>
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