Abacus Mental Math Training vs 巧工 · 古代机械三维互动馆

"Abacus Mental Calculation - Grade Assessment for Mental Math and Flash Anzan", a professional training and exam tool is a specialized application designed strictly in accordance with the "World Abacus Mental Calculation Federation Abacus Mental Calculation Grade Assessment Standard." It features professional grading, rich content, ease of use, and an educational and entertaining experience. It is an essential training and exam tool for mathematics enthusiasts and flash calculation enthusiasts. The application is divided into two main modes: Challenge Mode and Custom Mode. The Challenge Mode consists of 10 levels and 200 stages, corresponding to the proficiency and ability assessment standards of Abacus Mental Calculation from Level 10 to Level 1. The difficulty of each stage progresses gradually, and the exam stages of each major level strictly adhere to the question paper standards of the "Abacus Mental Calculation Grade Assessment Standard." This allows examinees and speed calculation enthusiasts to receive comprehensive Abacus Mental Calculation training and assess their own mental calculation skills. Level 5 of Abacus Mental Calculation corresponds to the corresponding level of the Computerized Accounting Certificate in the Certified Public Accountant examination, providing relevant individuals with ample practice opportunities. In the Abacus Mental Calculation examination and assessment standards, Levels 8-10 only involve addition and subtraction, while Levels 1-7 also include multiplication and division. The exam settings, difficulty, time limit, number of questions, and question types in this application fully comply with the corresponding exam standards. If students can successfully pass the corresponding level exam in this application, they can be considered to possess the equivalent qualification of Abacus Mental Calculation and can confidently participate in the grade assessment exam. The Custom Mode includes Flash Calculation and Abacus Mental Calculation functions. In Flash Calculation, users can select calculation methods, number range, number of digits, and time intervals. In Abacus Mental Calculation, users can customize calculation methods, number of questions, and time limit, thereby improving their mathematical and mental calculation skills through extensive and repetitive training. Our Abacus Mental Calculation and Flash Anzan application has a fresh and concise interface, natural and friendly interactions, and provides a user-friendly experience. It can quickly help mathematics enthusiasts improve their Abacus Mental Calculation performance and mathematical calculation skills. It is suitable for students of all levels, various abacus calculation, speed calculation, and mental calculation enthusiasts, as well as individuals preparing for Abacus Mental Calculation grade assessment and computerized accounting examinations. Our goal has always been to create a professional Abacus Mental Calculation and Flash Calculation application. We sincerely hope that this application can enhance your mental calculation ability, cognitive skills, and mathematical proficiency, and help you successfully pass the grade assessment exam!

巧工是一座装进口袋的古代机械陈列馆：50 件中外古代机械与器物，全部以三维模型呈现；机器会自己运转，你也可以点穿外壳看内部。 【机器自己会转，不是预录动画】 每台机器按真实传动关系装配：入馆后水流驱动自行运转，立轮经锥齿轮增速带动主轴，三盘磨同时转动；曲柄牵杆往复、木扇一下下向炉膛鼓风。齿轮啮合、连杆往复、凸轮起落、刮板链循环都是运行时逐帧算出来的，不是预录动画。单指滑移是旋转视角、双指捏合是缩放，均为相机操作。 【点一下，看穿外壳】 点选任一零件：它被点亮，其余构件转为半透明，内部机构一次看清——藏在樽身的都柱、槽内循环的刮板链、仪象台顶的轮系。底部铭牌同步给出该零件的名称与作用；转速表按各件器物的额定传动比读数，纯往复件显示「次/分」而非「转/分」。 【两页解说：传动链 与 历史】 「传动链」逐件列出谁驱动谁；「历史」页写明年代、出处、背景与意义。 【形制有争议的，把争议摆出来】 木牛流马、司南、候风地动仪、水运浑天——史学界本无定说。这些器物内置多种复原假说，点标题下方的按钮即可切换对比，每一种都只是「一种可能」，不是标准答案。 【50 件器物 · 七个门类】 ・水利提水 · 动力（7）：筒车、水排、桔槔、辘轳、翻车、水转翻车、高转筒车 ・粮食加工（7）：水转连磨、连机碓、卧轮水磨、水碾、罗、风扇车、水转三事 ・纺织（6）：纺车、水转大纺车、大纺车、缫车、斜织机、花楼机 ・天文 · 计时 · 指示（5）：漏刻、简仪、记里鼓车、指南车、水运仪象台 ・世界古代（9）：罗马双列水磨、希罗汽转球、阿基米德螺旋泵、安提基特拉机械、机轴擒纵、塔楼天文钟、贾扎里象钟、双缸水泵、可编程乐手 ・争议 · 多假说（4）：木牛流马、司南、候风地动仪、水运浑天 ・百工器用（12）：走马灯、竹蜻蜓、车船、杆秤、算盘、陀螺、手磨、欹器、被中香炉、踏轮起重机、曲辕犁、风筝 【离线 · 零权限 · 无内购】 全部内容随 App 内置，不发起任何网络请求，飞行模式下完整可用；不申请定位、相机、麦克风、照片、运动等任何系统权限；无账号、无广告、无内购、无订阅，也没有需要恢复的购买。设置里可按机型选择画质档位（自动 / 高 / 中 / 低）。 【请把它当演示，不要当考据】 巧工是机构原理的互动演示物，不是考据成果：齿数、转速、比例与构件尺寸均为便于看懂机构的演示取值，不可作为复原数据引用。历史文字带有「确证 / 较可靠 / 推定 / 争议」四档置信度标注，尚未逐条核对原书图版与博物馆实物。 【运行要求】iOS 17 及以上。iPhone 竖屏；iPad 原生支持，横竖屏全屏自适应（藏品墙按屏宽自动 2–4 列）。 问题、纠错与建议：xappfactory-feedback@hotmail.com