I. Anne Bronte’s Life

安妮·勃朗特生于1820年1月17日,是帕特里克·勃朗特与玛丽亚·布兰威尔·勃朗特最小的女儿。母亲在她仅一岁时去世。安妮与其姐妹艾米莉关系密切,共同创作了关于虚构世界贡达尔的作品。为了家庭责任,安妮成为了一名女家庭教师。她的小说《阿格尼斯·格雷》和《野庄园的房客》展现了她的文学才华。

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Anne was born on 17 January 1820. She is the youngest child of Patrick Bronte and Maria Branwell Bronte. Her mother died when she was only a year old, and when the two oldest siblings died of consumption in 1825, Anne was really too young to remember. She and Emily were especially close, writing together on their imaginary world of Gondal, a kingdom mostly separate from Angria, which Charlotte and brother Branwell wrote about. Like all the Bronte sisters, Anne was rather too dependent on these imaginary writings, but she had a strong sense of family duty. So she went away to school, where there was no time for such flights of fancy, and trained as a governess. Her health was not terribly good, but she persevered. In May of 1840, she went as governess to the home of the Reverend Edmund Robinson, where she would work for some years.

In 1843, Branwell went with Anne to the Robinsons' to act as tutor to the older boys of the family. When Branwell was dismissed in disgrace about two years later, Anne resigned her post, feeling that was the only proper thing to do. Though she was apparently glad to leave the post, she was depressed over the uncertainty of her future. The publication of the sisters' Poems in May 1846 was quite a bright spot for her, even though they didn't sell very well. Still, this publication encouraged all of them to write novels for publication, Anne's contribution being Agnes Grey. This novel, like Emily's Wuthering Heights, was published right after Jane Eyre in hopes of cashing in on that novel's success. Anne was at least optimistic enough to write a second novel, The Tenant of Wildfell Hall.

When Branwell died in September of 1848, it was Anne who took over many of the necessary arrangements, as Charlotte had taken ill. When Emily died of consumption three months later, Charlotte was the pillar of strength, as Anne herself was beginning to feel the first symptoms of her own fatal illness. The only thing that cheered her was the quiet but noticeable success of her poems in various literary magazines. When she was told that she, too, had consumption, in January of 1849, she nearly broke down completely under the weight of illness and her own religious doubts, but hid her panic from her family, still reeling from the two previous losses. Using a legacy from Anne's recently-diseased godmother, Charlotte took her to the seaside (which she loved) in hopes of a cure. She died at Scarborough on 28 May 1849; her last words being, "Take courage, Charlotte, take courage."

 

从您提供的文档《Jane Eyre - Charlotte Bronte》来看,这份文档可以作为实验所需的英文信源材料。以下是基于此文档进行马尔可夫信源模型实验的大致步骤及部分C++代码示例,以帮助理解如何完成您的实验任务: ### 实验步骤概览: #### 一、数据预处理阶段 1. **读取文本**:将《Jane Eyre》这本书的内容加载到内存中。 2. **清理文本**:去除标点符号等非字母字符,并且统一大小写转换为小写形式以便后续分析。 #### 二、构建马尔可夫链模型 1. **计算转移矩阵**:根据清理后的文本构建一阶、二阶乃至更高阶的状态转移矩阵。 - 对于一阶马尔可夫过程,状态就是单个单词; - 对于二阶,则是连续两个单词作为一个整体考虑其出现的概率分布; - 类似地对于三阶则是三个连续单词。 2. **生成新的句子**:利用上述得到的概率分布随机抽样来创建符合原文风格的新段落。 #### 三、输出结果 1. 输出字/词频统计表格。 2. 分别使用条件概率法和香农仿真算法生成大约300字长度的一阶、二阶和三阶马尔可夫信源文本。 ### C++代码片段展示(简化版) 以下是一些关键函数的概念性实现,请注意这只是一个非常基础的例子,具体细节可能需要根据实际情况调整优化。 ```cpp #include <iostream> #include <fstream> #include <map> #include <string> #include <vector> #include <random> using namespace std; // 函数用于加载并清理文本 string load_and_clean_text(const string& filename){ ifstream file(filename); string text((istreambuf_iterator<char>(file)), istreambuf_iterator<char>()); // 清理文本逻辑... transform(text.begin(), text.end(), text.begin(), ::tolower); // 转换为小写字母 // 这里还需要添加更多的清理规则... return text; } // 构建n元组频率表 void build_ngram_table(const string& text, map<vector<string>, int>& ngram_table, int n=1){ stringstream ss(text); vector<string> tokens(n), tmp_tokens; string word; while(ss >> word){ tmp_tokens.push_back(word); if(tmp_tokens.size() >= n){ copy(tmp_tokens.end()-n, tmp_tokens.end(), tokens.begin()); ++ngram_table[tokens]; } } } // 使用给定的ngram表生成指定长度的新文本 string generate_text_with_ngram(map<vector<string>, int>& ngram_table, size_t length, int n=1){ string result = ""; default_random_engine generator; uniform_int_distribution<int> distribution(0, 99); auto iter = begin(ngram_table); advance(iter, distribution(generator)%ngram_table.size()); vector<string> current_context(iter->first); for(size_t i=0;i<length;++i){ vector<pair<vector<string>, int>> candidates; for(auto &entry : ngram_table){ if(equal(entry.first.begin(), entry.first.begin()+n-1, current_context.begin())){ candidates.emplace_back(entry); } } // 根据概率选择下一个单词 int sum = accumulate(candidates.begin(), candidates.end(), 0, [](int acc, const pair<vector<string>, int>& p){return acc+p.second;}); int r = rand()%sum+1; for(auto &candidate:candidates){ if(r<=candidate.second){ current_context.erase(current_context.begin()); current_context.push_back(candidate.first.back()); result += candidate.first.back()+" "; break; }else{ r -= candidate.second; } } } return result; } int main(){ string filepath = "path/to/Jane_Eyre.txt"; // 替换成真实的路径 string cleaned_text = load_and_clean_text(filepath); map<vector<string>, int> unigram_table, bigram_table, trigram_table; build_ngram_table(cleaned_text, unigram_table, 1); build_ngram_table(cleaned_text, bigram_table, 2); build_ngram_table(cleaned_text, trigram_table, 3); cout << "Generated Unigram Text:\n" << generate_text_with_ngram(unigram_table, 300, 1) << endl; cout << "\nGenerated Bigram Text:\n" << generate_text_with_ngram(bigram_table, 300, 2) << endl; cout << "\nGenerated Trigram Text:\n" << generate_text_with_ngram(trigram_table, 300, 3) << endl; return 0; } ``` 请注意以上给出的是一个简化版本的解决方案框架,实际操作时还需考虑更多边界情况如异常处理、更复杂的文本清洗方式以及性能优化等问题。此外,在正式提交作业之前一定要仔细测试代码确保正确无误并且按照老师的要求格式化最终成果。
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