Gela Malek Pour gmalekpour@esri.com Visualize Time Enabled Data using ArcGIS Qt (C++) and ToolkitAbout Esri • We build mapping technology that our customers use to solve the world’s most complex challenges offer solutions to apply location-based analytics to business practices - Visualize and analyze data more effectively - Collaborate and share maps, apps and reports easily • Headquartered in Southern worldPurpose of this talk • Showcase a quick way to create a desktop app to visualize time enabled data • Setup the development environment using Esri templates • Use the ArcGIS toolkit to use already

Using the Microsoft Graph API to get Office 365 data in your mobile apps Alex Ziskind Technical Director @digitalix www.nuvious.com Hi, I’m Alex From + 750 Million 50 Million per month Problems

第三届中国 Rust 开发者大会 Use Rust to Develop the Decentralized Open Data Application Mike Tang daogangtang@gmail.com @daogangtang 2023-06-08 ➔ 裁员 ➔ 互联网格局定型 ➔ 平台倒闭，数据丢失 这是一个什么时代？ 互联网的终局 创业 -> 种子 dataset, data will increase quickly on any dimension. ➔ Multiple dimensions Dataset Models ➔ What is open data? Build an internet platform, but open its data to everyone. ➔ Why we need open data? The The business of the closed data model has been at the end. A New Proposal: Open Data Application The Road to Open Web ➔ From the user side, it looks like just the traditional Internet app ➔ But everyone

- Excel 转 CSV 工具 • Unqlite - 单文件非关系型数据库 • Wisecondor - 生物信息 CNV 分析 • mdsn - A Multi-address DSN(Data Source Name) parser. TDengine 应用开发组 • Python/Rust/Go 连接器 • 数据可视化 • 数据库运维工具 • 第三方数据源接入 • BI Time-Series Database + Caching + Data Subscription + Stream Processing Shell: Command Line Interface High Performance, Cloud Native Simplified Solution for Time-Series Data TDengine Telegraf Kafka Systems SCADA/HMI Analytics, ML App Python/Matlab/R Java/C/C++/Restful IoT Application Visualization Tool Grafana Web Based Management Tool 21,400+ 4,600+ 18,500+ 社区版开源 2019.07.12 集群版开源 2020

isn’t being declared? struct data_t { int a; int b; }; /* Get data from device ‘dev’. */ data_t get_data_from(size_t dev); What defines how dev is passed or data_t is returned? Calling conventions… being used here? push ... call data_t get_data_from(unsigned int) add esp, 4 add eax, edx Caller cleanup (cdecl) push ... call data_t get_data_from(unsigned int) add eax, edx cleanup (stdcall) data_t d = get_data_from(dev); return d.a + d.b;What isn’t being declared? struct data_t { int a; int b; }; /* Get data from device ‘dev’. */ data_t get_data_from(size_t dev);

 Why ranges?  Provide nicer and easier to read syntax: vector data { 11, 22, 33 }; sort(begin(data), end(data)); ranges::sort(data);  Eliminate mismatching begin/end iterators  Allows “range adaptors” chained using pipes  |13 Ranges  Example of chaining views: vector data { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; auto result { data | views::filter([](const auto& value) { return value % 2 == 0; })/* Initializers  Designated initialization of aggregates  E.g.: struct Data { int anInt { 0 }; std::string aString; }; Data d { .aString = "Hello" };48 Spaceship Operator <=>  Official name:

int for each? While you could just represent these values with unsigned ints or the underlying data, these new calendrical types also provide valuable abstraction. To use weekdays, months, weekday_indexeds eapSecondInformation • For pre-2018 leap seconds, we maintain a static constexpr table to pull data from. • Note that we don’t currently have a way to detect upcoming leap seconds on older Windows 3:00 UTC America/ New York43 tzdb • This is a type that stores data from the time zone database. • Specifically, it contains data members: • string version; • vector

void g() const &; void h() &&;  Those can be rewritten as: void f(this Data&); void g(this const Data&); void h(this Data&&);9 Explicit Object Parameters  Classes often have const and non-const accessing multidimensional data:  Function call: data(x, y, z)  Multiple levels of array indexing: data[x][y][z]  C++23  Multidimensional subscript operator: data[x, y, z]  E.g.: T& operator[](size_t corresponding to std::size_t22 Literal Suffix for size_t  Use case: std::vector data{ 11, 22, 33 }; for (auto i = 0, count = data.size(); i < count; ++i) { /* ... */ }  Doesn’t compile: i is deduced as int

vector 容器： data() 获取首地址指针 • data() 会返回指向数组中首个元素的指针， 也就是等价于 &a[0] 。由于 vector 是连续 存储的数组，因此只要得到了首地址，下一 个元素的地址只需指针 +1 即可。 • 因为指针的 p[i] 相当于 *(p + i) ，因此可以 把 data() 返回的首地址指针当一个数组来 访问。 • int *data() noexcept; noexcept; • int const *data() const noexcept; vector 容器： data() 获取首地址指针 • data() 返回的首地址指针，通常配合 size() 返回的数组长度一起使用（见上一课《 C 语言指针》中提到，连续的动态数组只需要 知道首地址和数组长度即可完全确定）。 • 用他来获取一个 C 语言原始指针 int * ， 很方便用于调用 会在退出作用域时释放内存，这时候所 有指向其中元素的指针，包括 data() 都会失效。 因此如果你是在语句块内获取的 data() 指针， 语句块外就无法访问了。 • 可见 data() 指针是对 vector 的一种引用，实 际对象生命周期仍由 vector 类本身管理。 vector 容器：延续生命周期 • 如果需要在一个语句块外仍然保持 data() 对 数组的弱引用有效，可以把语句块内的 vector

Security events and logs. SIEM Analytics of corporate networks Telemetry Industrial monitoring Sensor data IoT Self-driving cars Agriculture Smart cities, surveillance Delivery Taxi Food tech HoReCa Scientific physics Astronomy & astrophysics Econometrics ML feature analytics and research Trading & financial data Fintech Insurance Investment banking Blockchain Gambling Adult Business intelligence ClickHouse Интеграция с ML & AI. Обработка графов • Batch jobs • Data Hub Support For Semistructured Data 27 JSO data type: CREATE TABLE games (data JSON) ENGINE = MergeTree; • You can insert arbitrary nested