spells types two of
mount: /home/vi/book: wrong fs type, bad option, bad superblock on /dev/sdd1, missing codepage or helper program, or other error.
mount: /home/vi/book: wrong fs type, bad option, bad superblock on /dev/sdd1, missing codepage or helper program, or other error. 解决方法： sudo mount -t ......
Python Object of type float32 is not JSON serializable
前言 使用 json.dumps(result) 对数据转 JSON 数据出现错误：TypeError: Object of type float32 is not JSON serializable 数据中存在的 float32 数据是 numpy 格式的数据，Python 内置的 float 类 ......
题解 AT_codefestival_2016_final_f【Road of the King】
注意到当前移动到的位置并不重要，重要的是经过的点数和 \(1\) 所在强连通分量大小，因此把它们放进状态里：设 \(f_{i,j,k}\) 表示进行 \(i\) 次移动，经过了 \(j\) 个不同的点，此时 \(1\) 所在的强连通分量大小为 \(k\) 的方案数。 考察下一次移动到的点的情况： 没 ......
CodeForces 1452E Two Editorials
洛谷传送门 CF 传送门 考虑枚举其中一个区间取 \([i, i + K - 1]\)，考虑对于每个 \(j\) 一次性处理出，区间取 \([j - K + 1, j]\) 多产生的贡献（即以 \(j\) 为右端点）。 对于一个 \([l_k, r_k]\)，设其与 \([i, i + K - 1] ......
Mitigation of China’s carbon neutrality to global warming
Global warming since the preindustrial era has been primarily attributed to the increase in atmospheric CO2 concentrations, which mainly results from ......
error TS2322 Type 'string null' is not assignable to type 'string unXdefined'.
这个错误消息涉及到Angular编译时的类型检查，特别是在Ivy编译器的部分编译模式下。错误消息本身提供了关键信息，但让我们详细解释这个错误的含义、可能的原因和如何修复它。 错误消息: Compiling with Angular sources in Ivy partial compilation ......
[题解] CF1156E Special Segments of Permutation
Special Segments of Permutation 给你一个排列 \(p\)，求有多少个区间 \([l, r]\) 满足 \(p_l + p_r = \max_{i \in [l, r]} p_i\)。 \(n \le 2 \times 10^5\)。 按最大值分治，记当前的分治中心为 ......
[ARC092F] Two Faced Edges 题解
题意 给定一张有向图，询问将每条有向边反向过后整个图的强连通分量的个数是否发生改变。 数据范围：$n\le 1000,m\le 200000$。 思路 分类讨论，讨论强连通分量是增加了还是减少了，假设修改的边是 $u\to v$。 强连通分量减少 因为只修改了一条边，所以强连通分量减少的情况肯定是 ......
USB(2.0 / Type-C) to MPSSE(JTAG / SPI / IIC) / UART / FIFO: FTDI 的FT4232H配成SPI+JTAG+Two Ways UART使用实例
Ti60 Demo板FT4232H 串口使用 易灵思FPGA技术交流 2022-04-15 08:43 Ti60 F225 demo板使用的是FT4232H,有4个通道A,B,C和D。其中A通道用于SPI接口，可以是AS也可以是PS。通道B用于JTAG，通道C连接了UART，通道D连接了FX3。 A ......
input type="number" 时去除上下按钮样式
全局样式 /* 取消[type='number']的input的上下箭头 */ input::-webkit-inner-spin-button { -webkit-appearance: none !important; } input::-webkit-outer-spin-button { - ......
Specific Measure of Soil Erosion
Soil erosion is an ongoing threat to multiple industries today. Once soil erodes, it becomes difficult to restore that land area to its former product ......
2023年人工智能发展现状报告：State of AI Report 2023
链接： https://www.stateof.ai/ Now in its sixth year, the State of AI Report 2023 is reviewed by leading AI practioners in industry and research. It cons ......
[LeetCode] 1360. Number of Days Between Two Dates 日期之间隔几天
Write a program to count the number of days between two dates. The two dates are given as strings, their format is YYYY-MM-DD as shown in the examples ......
Solutions of Soil Salinization
Soil salinization prevention bases on avoiding excessive salt penetration. Even though plants require a certain amount of salts to develop, their need ......
The prevention of water contamination
In order to prevent and control water contamination, China has formulated many policies and laws, such as the Water Pollution Prevention and Control L ......
USB 3.0 Type-C PD(Power Delivery)
www.usb.org: USB Charger (USB Power Delivery) | USB-IF Type-C PD(Power Delivery) USB Power Delivery ......
The measures of China's air pollution
The expiring action plan The earlier Air Pollution Action Plan, released in September 2013, may have been China’s most influential environmental polic ......
The measures of solving water issues
（1）Proper Sewage TreatmentAs a way of reducing the pollution load to zero, there is a need for the more advanced engineered cleaning process. Some dev ......
Fight Hard for Ecological Protection and Governance of the Yellow River to Address the Water Contamination
1.Effective measure aimed at addressing the water contamination: We will fight hard for ecological protection and governance of the Yellow River. We w ......
train_logReg_param.o:train_logReg_param.cc:(.text+0x3407): more undefined references to `std::__throw_out_of_range_fmt(char const*, ...)' follow
001、make 编译 报错：train_logReg_param.o:train_logReg_param.cc:(.text+0x3407): more undefined references to `std::__throw_out_of_range_fmt(char const*, ... ......
The solution of soil erosion
Solution of soil erosion (1) Engineering measures: building terraces, damming and silting land, using earthwork and concrete works, fish scale pits, e ......
../include/types.hh:16:43: fatal error: boost/archive/text_oarchive.hpp: No such file or directory
001、make编译报错如下：../include/types.hh:16:43: fatal error: boost/archive/text_oarchive.hpp: No such file or directory 002、 ......
The governance measures of marine oil pollution
The governance measures (1). Preventive measures. Prevention is one of the most effective control methods, including the following aspects: a. Strengt ......
C++ insert into tables of pgsql via libpq-fe.h and compile by g++-13
1.Install libpq-dev sudo apt install libpq-dev locate libpq-fe.h /usr/include/postgresql/libpq-fe.h 2.create table t1 create table t1(id bigserial not ......
The PRC's Policy of Tackling Water Pollution
THE POLICY CONTEXT The industrial water management system in the PRC is spread over two phases (see Figure 1). The first phase is "before-process", wh ......
the use of photovoltaic to prevent and control desertification
Land desertification is one of the main causes of sandstorm disaster. With the further intensification of global warming, desertification is becoming ......
Carbon Trading Scheme——One of China’s Innovative Strategies for Addressing Global Warming
Introduction China, as the world’s largest emitter of greenhouse gases, recognizes the urgent need to tackle the global warming problem. Over the year ......
The use of green energy can effectively solve the problem of air pollution
The use of green energy can effectively solve the problem of air pollution 一、the operation of green energy Green energy refers to a way of producing a ......
mysql 查询报错Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column
这个错误是由于 MySQL 的新版本中默认开启了ONLY_FULL_GROUP_BY模式，即在 GROUP BY 语句中的 SELECT 列表中，只能包含分组或聚合函数，不能包含其他列。而你的查询语句中出现了一个列senior_two.score.student_id，它既没有被分组也没有被聚合，因 ......
EF报错：Unable to create an object of type 'XXXXXXX'. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728
这个是在EF迁移的时候报错： 解决方案：修改你的MyDbcontext： 代码如下： public class StoreDbContexttFactory : IDesignTimeDbContextFactory< ‘你的类名’> { public ‘你的类名’CreateDbContext(s ......