期末课设作业:机器学习分类系统设计与实现

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资源摘要信息:"机器学习课程期末课设作业_machinelearning_Classify_system.zip" 文件名称中的"机器学习"是人工智能的一个重要分支,它致力于通过算法使计算机系统能够在没有明确指令的情况下进行学习。机器学习通常涉及数据的处理和分析,以便计算机可以识别模式、做出决策,并对新的数据做出预测。机器学习算法可以分为几种主要类型,包括监督学习、无监督学习、半监督学习和强化学习。监督学习涉及已标记的数据集,算法从输入和输出配对中学习,然后应用于新的数据。无监督学习则处理未标记的数据集,算法必须发现数据中的模式或结构。半监督学习结合了监督学习和无监督学习,使用少量的标记数据和大量的未标记数据。强化学习关注的是如何通过与环境的交互来学习最佳行动策略。 "Classify_system"可能指的是分类系统,这是一种常见的机器学习任务,其目的是将数据分为预先定义的类别。分类系统在许多领域都有应用,包括垃圾邮件检测、医疗诊断、信用评分和图像识别。在构建分类系统时,通常需要进行数据预处理、特征选择、模型训练和评估等步骤。 由于提供的信息中没有具体的标签和详细的文件列表,我们无法获得关于该项目具体使用的技术栈、库、框架或具体的实现细节。不过,根据文件名我们可以推测该课程作业可能包括以下内容: 1. 数据预处理:在进行模型训练之前,需要对数据进行清洗、标准化、归一化或编码等预处理步骤。 2. 特征提取与选择:根据机器学习模型的要求提取相关特征,并选择对预测任务最有帮助的特征。 3. 模型选择:选择合适的机器学习模型进行训练,例如决策树、支持向量机(SVM)、神经网络、k最近邻(k-NN)、逻辑回归等。 4. 训练与验证:使用训练集对选定的模型进行训练,并使用验证集或交叉验证来调整模型参数,以防止过拟合。 5. 评估:通过测试集评估模型的性能,常用的评估指标包括准确率、精确率、召回率和F1分数。 6. 优化与调整:根据评估结果对模型进行优化,这可能涉及调整算法参数、选择不同的模型或改进特征工程。 7. 报告撰写:整理项目过程,撰写项目报告,报告中需要包括项目的背景、所用方法、实验过程、结果分析以及结论。 需要注意的是,由于标题和描述中没有提供具体的文件结构和内容,上述知识点是基于文件名提供的有限信息做出的合理推测。实际的项目文件可能会包含更多详细内容,如具体的数据集、代码实现、实验结果和分析等。在实际操作过程中,学生应严格遵守学术诚信的原则,确保所提交的课设作业是本人独立完成的工作。

使其简短些 SELECT * FROM ( SELECT fpd.fpd_id AS fpdId, fpd.fpd_budget_project AS fpdBudgetProject, fpd.fpd_budget_project_id AS fpdBudgetProjectId, fpd.fpd_pf_name AS fpdPfName, fpd.fpd_pf_id AS fpdPfId, fpd.fpd_expend_subject AS fpdExpendSubject, fpd.fpd_expend_subject_id AS fpdExpendSubjectId, fpd.fpd_payee_name AS fpdPayeeName, fpd.fpd_payee_account AS fpdPayeeAccount, fpd.fpd_payee_opening_bank AS fpdPayeeOpeningBank, fpd.fpd_payee_opening_bank_num AS fpdPayeeOpeningBankNum, fpd.fpd_dept_pay_economics_classify_num AS fpdDeptPayEconomicsClassifyNum, fpd.fpd_dept_pay_economics_classify_name AS fpdDeptPayEconomicsClassifyName, fpd.fpd_applied_amount AS fpdAppliedAmount, fpd.fpd_capital_use AS fpdCapitalUse, fpd.fpd_postscript AS fpdPostscript, fpd.fpd_budget_item_name AS fpdBudgetItemName, fpd.fpd_budget_item_number AS fpdBudgetItemNumber, fpd.fpd_dr_name AS fpdDrName, dbec.dbec_parent_num AS dbecParentNum FROM financial_payment_details fpd LEFT JOIN dept_budget_economy_class dbec ON fpd.fpd_dept_pay_economics_classify_num = dbec.dbec_num WHERE fpd.fpd_is_tax = "0" UNION ALL SELECT fpd.fpd_id AS fpdId, fpd.fpd_budget_project AS fpdBudgetProject, fpd.fpd_budget_project_id AS fpdBudgetProjectId, fpd.fpd_pf_name AS fpdPfName, fpd.fpd_pf_id AS fpdPfId, fpd.fpd_expend_subject AS fpdExpendSubject, fpd.fpd_expend_subject_id AS fpdExpendSubjectId, fpd.fpd_payee_name AS fpdPayeeName, fpd.fpd_payee_account AS fpdPayeeAccount, fpd.fpd_payee_opening_bank AS fpdPayeeOpeningBank, fpd.fpd_payee_opening_bank_num AS fpdPayeeOpeningBankNum, fpd.fpd_dept_pay_economics_classify_num AS fpdDeptPayEconomicsClassifyNum, fpd.fpd_dept_pay_economics_classify_name AS fpdDeptPayEconomicsClassifyName, sum( fpd.fpd_applied_amount ) AS fpdAppliedAmount, fpd.fpd_capital_use AS fpdCapitalUse, fpd.fpd_postscript AS fpdPostscript, fpd.fpd_budget_item_name AS fpdBudgetItemName, fpd.fpd_budget_item_number AS fpdBudgetItemNumber, fpd.fpd_dr_name AS fpdDrName, dbec.dbec_parent_num AS dbecParentNum FROM financial_payment_details fpd LEFT JOIN dept_budget_economy_class dbec ON fpd.fpd_dept_pay_economics_classify_num = dbec.dbec_num WHERE fpd.fpd_is_tax = "1" GROUP BY fpd_pay_num ) t1

2023-04-20 上传

将下面这条sql语句简化一下:SELECT * FROM ( SELECT fpd.fpd_id AS fpdId, fpd.fpd_budget_project AS fpdBudgetProject, fpd.fpd_budget_project_id AS fpdBudgetProjectId, fpd.fpd_pf_name AS fpdPfName, fpd.fpd_pf_id AS fpdPfId, fpd.fpd_expend_subject AS fpdExpendSubject, fpd.fpd_expend_subject_id AS fpdExpendSubjectId, fpd.fpd_payee_name AS fpdPayeeName, fpd.fpd_payee_account AS fpdPayeeAccount, fpd.fpd_payee_opening_bank AS fpdPayeeOpeningBank, fpd.fpd_payee_opening_bank_num AS fpdPayeeOpeningBankNum, fpd.fpd_dept_pay_economics_classify_num AS fpdDeptPayEconomicsClassifyNum, fpd.fpd_dept_pay_economics_classify_name AS fpdDeptPayEconomicsClassifyName, fpd.fpd_applied_amount AS fpdAppliedAmount, fpd.fpd_capital_use AS fpdCapitalUse, fpd.fpd_postscript AS fpdPostscript, fpd.fpd_budget_item_name AS fpdBudgetItemName, fpd.fpd_budget_item_number AS fpdBudgetItemNumber, fpd.fpd_dr_name AS fpdDrName, dbec.dbec_parent_num AS dbecParentNum FROM financial_payment_details fpd LEFT JOIN dept_budget_economy_class dbec ON fpd.fpd_dept_pay_economics_classify_num = dbec.dbec_num WHERE fpd.fpd_is_tax = "0" UNION ALL SELECT fpd.fpd_id AS fpdId, fpd.fpd_budget_project AS fpdBudgetProject, fpd.fpd_budget_project_id AS fpdBudgetProjectId, fpd.fpd_pf_name AS fpdPfName, fpd.fpd_pf_id AS fpdPfId, fpd.fpd_expend_subject AS fpdExpendSubject, fpd.fpd_expend_subject_id AS fpdExpendSubjectId, fpd.fpd_payee_name AS fpdPayeeName, fpd.fpd_payee_account AS fpdPayeeAccount, fpd.fpd_payee_opening_bank AS fpdPayeeOpeningBank, fpd.fpd_payee_opening_bank_num AS fpdPayeeOpeningBankNum, fpd.fpd_dept_pay_economics_classify_num AS fpdDeptPayEconomicsClassifyNum, fpd.fpd_dept_pay_economics_classify_name AS fpdDeptPayEconomicsClassifyName, sum( fpd.fpd_applied_amount ) AS fpdAppliedAmount, fpd.fpd_capital_use AS fpdCapitalUse, fpd.fpd_postscript AS fpdPostscript, fpd.fpd_budget_item_name AS fpdBudgetItemName, fpd.fpd_budget_item_number AS fpdBudgetItemNumber, fpd.fpd_dr_name AS fpdDrName, dbec.dbec_parent_num AS dbecParentNum FROM financial_payment_details fpd LEFT JOIN dept_budget_economy_class dbec ON fpd.fpd_dept_pay_economics_classify_num = dbec.dbec_num WHERE fpd.fpd_is_tax = "1" GROUP BY fpd_pay_num ) t1

2023-04-20 上传