I felt very ashamed

作者投入两年积蓄参加英语培训,希望通过提高英语水平找到更好的工作机会。在实际学习过程中遇到了困难,进步缓慢,感到沮丧。

About four months ago, I spent my savings of two years on the English Training.

The initial purpose of it was to find a shortcut to success.

Because in my practical life, I found it's so difficult to improve the professional skills to a high level. And even if I reach that level, the benefits are just so-so.

But if I can speak fluent English, it is very easy to find a very good job.

 

Actually in my heart of hearts I feel inferior about my college. I attained a very lousy mark in the university Entrance Examination, so I couldn't get into the good university.

Thankfully, in my past work I did pretty good and was approved by many people. My self-confidence was gradually returning, but I still not really found the things which can make my inside stronger.

 

Then I thought about the English, the fluent spoken English. With my steady improvement professional skills, I can tell others about my history more confidently, I have the ability to own a good future.

 

In the past, I hesitated whether I should upgrade my diploma to Undergraduate or re-enter the university for postgraduate. But inwardly I don’t want that. They will waste so much time but could not get anything of value. Maybe you think I can get the diploma. Just for this? Is this really what I want in my life? No! Absolutely not! I will not yield.

 

I believed that I found the right way to success, but I’m ashamed for the effect of English learning.

I have already learned about four months, but little progress. Compare with the others in the conversation course, I still have a long way to go. Many of them are high school students, or university students. When they chat with the foreign teachers, they’re so fluent and comfortable.

They always talk about the study abroad, the foreign culture, the fashion and so on. They don’t worry about the money because they are rich or their parents are. It seems that we are not in the same stratum.

 

I actually planned some method for the quick to learn, for example, prepare all the sentences I may use in the training centre, classify the words in my daily life by some different topics, or imagine a conversation about something interesting.

 

But I just planned them, didn’t do. So each time when I thought of this, compared with others, I felt very ashamed.

 

Time flies. But I still have time to build the beautiful future. Do it properly or don't do it at all.

 

数据驱动的两阶段分布鲁棒(1-范数和∞-范数约束)的电热综合能源系统研究(Matlab代码实现)内容概要:本文围绕“数据驱动的两阶段分布鲁棒(1-范数和∞-范数约束)的电热综合能源系统研究”展开,提出了一种结合数据驱动与分布鲁棒优化方法的建模框架,用于解决电热综合能源系统在不确定性环境下的优化调度问题。研究采用两阶段优化结构,第一阶段进行预决策,第二阶段根据实际场景进行调整,通过引入1-范数和∞-范数约束来构建不确定集,有效刻画风电、负荷等不确定性变量的波动特性,提升模型的鲁棒性和实用性。文中提供了完整的Matlab代码实现,便于读者复现和验证算法性能,并结合具体案例分析了不同约束条件下系统运行的经济性与可靠性。; 适合人群:具备一定电力系统、优化理论和Matlab编程基础的研究生、科研人员及工程技术人员,尤其适合从事综合能源系统、鲁棒优化、不确定性建模等相关领域研究的专业人士。; 使用场景及目标:①掌握数据驱动的分布鲁棒优化方法在综合能源系统中的应用;②理解1-范数和∞-范数在构建不确定集中的作用与差异;③学习两阶段鲁棒优化模型的建模思路与Matlab实现技巧,用于科研复现、论文写作或工程项目建模。; 阅读建议:建议读者结合提供的Matlab代码逐段理解算法实现细节,重点关注不确定集构建、两阶段模型结构设计及求解器调用方式,同时可尝试更换数据或调整约束参数以加深对模型鲁棒性的理解。
你提供的 `dict.txt` 文件内容是典型的 **英译英词典格式**,每一行由一个单词(或词组)和一个对应的英文解释组成,用空白(空格或制表符)分隔。 --- ## ✅ SQLite 在这个项目中的作用(结合你提供的 dict.txt 内容) ### 1. **持久化存储字典数据** 目前你使用 `dict.txt` 文件来存储单词和解释,这是一种 **静态文本文件存储方式**。如果你希望实现: - 单词数据的快速查询 - 动态更新(添加、删除、修改单词) - 多用户共享访问 - 避免频繁读取文本文件 那么就可以使用 **SQLite** 来替代文本文件,将 `dict.txt` 中的内容导入数据库中。 --- ## ✅ 如何将你的 dict.txt 导入 SQLite? ### 1. 创建 `dictionary` 表结构 ```sql CREATE TABLE IF NOT EXISTS dictionary ( word TEXT PRIMARY KEY NOT NULL, meaning TEXT NOT NULL ); ``` ### 2. 编写 C 程序将 `dict.txt` 内容导入数据库 ```c #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sqlite3.h> #define BUFFER_SIZE 1024 int main() { sqlite3 *db; int rc = sqlite3_open("dictionary.db", &db); if (rc != SQLITE_OK) { fprintf(stderr, "无法打开数据库: %s\n", sqlite3_errmsg(db)); return 1; } // 创建字典表 const char *create_sql = "CREATE TABLE IF NOT EXISTS dictionary (" "word TEXT PRIMARY KEY NOT NULL, " "meaning TEXT NOT NULL);"; char *err_msg = 0; if (sqlite3_exec(db, create_sql, 0, 0, &err_msg) != SQLITE_OK) { fprintf(stderr, "创建表失败: %s\n", err_msg); sqlite3_free(err_msg); } FILE *fp = fopen("dict.txt", "r"); if (!fp) { perror("无法打开 dict.txt"); sqlite3_close(db); return 1; } char line[BUFFER_SIZE]; while (fgets(line, sizeof(line), fp)) { char word[256] = {0}; char meaning[1024] = {0}; // 使用 sscanf 提取单词和解释 if (sscanf(line, "%s %[^\n]", word, meaning) == 2) { char sql[2048]; snprintf(sql, sizeof(sql), "INSERT OR IGNORE INTO dictionary (word, meaning) VALUES ('%q', '%q');", word, meaning); if (sqlite3_exec(db, sql, 0, 0, &err_msg) != SQLITE_OK) { fprintf(stderr, "插入失败: %s\n", err_msg); sqlite3_free(err_msg); } } } fclose(fp); sqlite3_close(db); printf("数据导入完成\n"); return 0; } ``` --- ## ✅ 使用 SQLite 查询单词 将下面的函数加入服务器代码中用于从数据库中查找单词解释: ```c const char* lookup_meaning_from_sqlite(sqlite3 *db, const char *word) { static char meaning[1024]; // 静态变量用于返回结果 char sql[1024]; snprintf(sql, sizeof(sql), "SELECT meaning FROM dictionary WHERE word = '%q';", word); sqlite3_stmt *stmt; if (sqlite3_prepare_v2(db, sql, -1, &stmt, NULL) != SQLITE_OK) { return "数据库查询失败"; } if (sqlite3_step(stmt) == SQLITE_ROW) { strncpy(meaning, (const char *)sqlite3_column_text(stmt, 0), sizeof(meaning) - 1); } else { strncpy(meaning, "未找到该单词的解释", sizeof(meaning) - 1); } sqlite3_finalize(stmt); return meaning; } ``` --- ## ✅ 总结:SQLite 的优势 | 特性 | 说明 | |------|------| | 快速查询 | 支持索引,查询效率高 | | 数据安全 | 支持事务,避免数据损坏 | | 易于维护 | 可以使用 SQLiteStudio 等工具查看、修改数据 | | 可扩展性强 | 可以添加字段如例句、词性、音标等 | ---
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