= Day 4 = 《 The conjunction 》

Conjunction,it is kind of words,use to connect words,phrases,sentences.

It is very important in written english,because a proper conjunction in your sentence,will make the article smoothly.

Make some samples of conjunction,these are some commonly used.

=============

- The fur coat was soft,also warm.

- We have received your telegram as well as your letter of 20th May.

- The car was almost new;besides,it was in excellent condition.

Both the wheal and the barley will be shipped tomorrow.

- She is very hard-working indeed,but thenshe always has been,hasn't she?

- Mr ,either we manager this case,or you manage it.

- The coach was not on good,terms with any of the players,hence learn morale was rather now.

- He knew what be wanted;However he didn't know how to get it.

- He will be back in the minutes,In the meanwhile let's wait outside.

- He moved steadily,looking neither leftnor right.

- The plan had certain weaknesses,nevertheless we decided to adapt it.

- He was not only unkind but also untrue.

On the one hand I don't like this job,on the other handI can't get a better one.

- Be quick,or it may be too late.

- Hurry up,or else you will miss the last bus.

- You must work hard;otherwise you will not learn english well.

- There seemed no chance of coming to an agreement;therefore it was decided to break off negotiations.

- They are the same,yet not the same.

- He knows English perfectly through he has never been to England.

As he predicted,the wind changed.

As winter approached,the days became shorter.

As I have not read the book,I cannot tell you anything about it.

- I'll do it as you told me.

-  As far as I concerned,I know nothing about it.

- He stopped there as if he were petrified with terror.

- You may take my terminal as long as you don't keep it too long.

By the time he got there,everyone else had arrived.

- I‘ll finish it even if it take me all night.

In case you see him,ask him about it.

- The invitations were send out early in order that the delegates might arrive in time for the conference.

- You must return once he given you the money.

- I'll wash the dress so that you can wear it.

The moment someone appeared,we are doing something.

- I refuse to do it unless you help

- Whether we go or whether we stay,the result is same.


org.springframework.jdbc.UncategorizedSQLException: ### Error querying database. Cause: java.sql.SQLException: Character set 'utf8mb4_general_ci' cannot be used in conjunction with 'binary' in call to regexp_like. ### The error may exist in class path resource [mapper/StaffTeamMapper.xml] ### The error may involve defaultParameterMap ### The error occurred while setting parameters ### SQL: SELECT COUNT(*) AS total FROM cm_staff_team t LEFT JOIN (SELECT m.staff_code, MAX(m.clock_time) AS clock_time FROM cm_attendance_management_2025 m WHERE m.clock_flag = 1 AND m.vesting_year = ? AND m.clock_time BETWEEN ? AND ? + INTERVAL 1 DAY GROUP BY m.staff_code) t2 ON t.staff_code = t2.staff_code LEFT JOIN (SELECT m.staff_code, COUNT(DISTINCT m.vesting_date) AS missing_days FROM cm_attendance_management_2025 m WHERE m.clock_flag = 0 AND m.vesting_year = ? AND m.clock_time BETWEEN ? AND ? + INTERVAL 1 DAY GROUP BY m.staff_code) t3 ON t.staff_code = t3.staff_code WHERE t.is_on = 1 AND (t.region_name REGEXP ? AND is_all = 0) AND t.region_name REGEXP ? AND t.main_position_code REGEXP ? AND t.main_position_name REGEXP ? ### Cause: java.sql.SQLException: Character set 'utf8mb4_general_ci' cannot be used in conjunction with 'binary' in call to regexp_like. ; uncategorized SQLException; SQL state [HY000]; error code [3995]; Character set 'utf8mb4_general_ci' cannot be used in conjunction with 'binary' in call to regexp_like.; nested exception is java.sql.SQLException: Character set 'utf8mb4_general_ci' cannot be used in conjunction with 'binary' in call to regexp_like. 帮我解决这个问题
11-07
内容概要:本文详细介绍了一种基于Simulink的表贴式永磁同步电机(SPMSM)有限控制集模型预测电流控制(FCS-MPCC)仿真系统。通过构建PMSM数学模型、坐标变换、MPC控制器、SVPWM调制等模块,实现了对电机定子电流的高精度跟踪控制,具备快速动态响应和低稳态误差的特点。文中提供了完整的仿真建模步骤、关键参数设置、核心MATLAB函数代码及仿真结果分析,涵盖转速、电流、转矩和三相电流波形,验证了MPC控制策略在动态性能、稳态精度和抗负载扰动方面的优越性,并提出了参数自整定、加权代价函数、模型预测转矩控制和弱磁扩速等优化方向。; 适合人群:自动化、电气工程及其相关专业本科生、研究生,以及从事电机控制算法研究与仿真的工程技术人员;具备一定的电机原理、自动控制理论和Simulink仿真基础者更佳; 使用场景及目标:①用于永磁同步电机模型预测控制的教学演示、课程设计或毕业设计项目;②作为电机先进控制算法(如MPC、MPTC)的仿真验证平台;③支撑科研中对控制性能优化(如动态响应、抗干扰能力)的研究需求; 阅读建议:建议读者结合Simulink环境动手搭建模型,深入理解各模块间的信号流向与控制逻辑,重点掌握预测模型构建、代价函数设计与开关状态选择机制,并可通过修改电机参数或控制策略进行拓展实验,以增强实践与创新能力。
<think>我们正在讨论一个XML片段,它看起来像是MyBatis或iBATIS框架中的动态SQL语句。 这个片段是:<iterate prepend="" property="datas" open="(" close=")" conjunction=","> #datas[]# <!-- 订单状态 --> </iterate> 让我们分解这个片段: 1. `<iterate>` 标签:在MyBatis(或iBATIS)中,`<iterate>`标签用于遍历一个集合(如List、数组等),并对其中的每个元素生成相应的SQL片段。 2. 属性解释: - `prepend`:这是一个可选的属性,用于指定在生成的内容之前添加的字符串。这里为空字符串,所以不会在前面添加额外的字符串。 - `property`:指定要迭代的集合属性名。这里属性名为`datas`,意味着这个迭代会针对一个名为`datas`的集合(或数组)进行。 - `open`:指定在迭代生成的整个结果之前添加的字符串。这里是一个左括号 `(`。 - `close`:指定在迭代生成的整个结果之后添加的字符串。这里是一个右括号 `)`。 - `conjunction`:指定每次迭代之间使用的分隔符。这里是一个逗号 `,`。 3. 标签体内容:`#datas[]#` 是占位符,它会被当前迭代的元素替代。注意,在MyBatis中,通常使用`#{}`作为参数占位符,但这里使用的是`#datas[]#`,这可能是iBATIS的旧语法(MyBatis的前身)。在MyBatis中,我们通常这样写:`#{item}` 并在`<foreach>`标签中指定`item`属性(但这里用的是`<iterate>`,所以可能是iBATIS)。实际上,在MyBatis中,我们使用`<foreach>`标签,而`<iterate>`是iBATIS的标签。 4. 注释:`<!-- 订单状态 -->` 是一个XML注释,说明这个迭代可能是用于订单状态的数据。 因此,这个代码片段的用途是:遍历一个名为`datas`的集合,将集合中的每个元素作为值,生成一个以逗号分隔的列表,并且在列表的开头和结尾分别加上左括号和右括号。 例如,如果`datas`是一个包含[10, 20, 30]的列表,那么生成的SQL片段将是: `(10, 20, 30)` 这个片段通常用在SQL语句的IN条件中,因为IN条件需要这样的格式:`column IN (value1, value2, ...)` 所以,在完整的SQL语句中,可能会这样使用: ```sql SELECT * FROM orders WHERE status IN <iterate prepend="" property="datas" open="(" close=")" conjunction=","> #datas[]# </iterate> ``` 注意:在MyBatis中,我们使用`<foreach>`标签,而不是`<iterate>`。例如,同样的功能在MyBatis中会这样写: ```xml <foreach item="item" collection="datas" open="(" close=")" separator=","> #{item} </foreach> ``` 但是,由于问题中给出的是`<iterate>`标签,所以可以判断这是iBATIS框架的语法。 总结:该代码片段用于在SQL语句中动态生成一个由集合元素组成的、用括号括起来且以逗号分隔的列表,常用于IN条件。 </think>理解您提供的代码片段:`<iterate prepend="" property="datas" open="(" close=")" conjunction=","> #datas[]# <!-- 订单状态 --> </iterate>` ### 代码片段解析 1. **核心组件**: - `<iterate>`:动态 SQL 标签,用于遍历集合(数组/列表) - `property="datas"`:指定要遍历的集合对象(名为 `datas` 的参数) - `open="(" close=")"`:生成以 `(` 开头、`)` 结尾的包围结构 - `conjunction=","`:集合元素间用逗号分隔 2. **生成效果**(假设 `datas = [1001, 1002, 1003]`): ```sql (1001, 1002, 1003) ``` 3. **典型用途**: 主要用于构建 SQL **IN 子句**,例如: ```sql SELECT * FROM orders WHERE status IN <iterate property="datas" open="(" close=")" conjunction=","> #datas[]# </iterate> ``` 等效于: ```sql SELECT * FROM orders WHERE status IN (1001, 1002, 1003) ``` 4. **特殊语法说明**: - `#datas[]#`:动态插入当前遍历元素(`[]` 表示迭代中的当前项) - `<!-- 订单状态 -->`:XML 注释(实际执行时会被忽略) ### 应用场景示例 在订单查询系统中,根据多种状态筛选订单: ```xml <select id="findOrdersByStatus"> SELECT * FROM orders WHERE status IN <iterate property="statusList" open="(" close=")" conjunction=","> #statusList[]# <!-- 如: 1(待支付),2(已发货) --> </iterate> </select> ``` 调用时传入参数:`statusList = [1, 2, 5]`,生成: ```sql WHERE status IN (1, 2, 5) ``` > 💡 提示:这是 **iBATIS/MyBatis** 框架特有的动态 SQL 语法(`<iterate>` 在 MyBatis 3+ 中已升级为 `<foreach>`)[^1]。
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