Ignite Realtime Blog: Openfire 4.8.3 Release
The Ignite Realtime community is pleased to announce the release of Openfire 4.8.3. This release contains an important fix for thread lock situation described with OF-2845. If you have noticed clients getting logged out or unable to connect with Openfire 4.8.1 or 4.8.2, please do try this release and report in the community forums if your issue is persisting.
T … ⌘ Read more
【The K 聊汽车安全（2）】汽车工程是如何进行人体伤害评价的？
汽车碰撞安全设计主要考量的，就是在发生碰撞事故时保护乘员和行人等道路弱势群体，减轻事故给乘员和道路弱势群体造成的伤害。
我们在上一讲中已经对全球主要的汽车安全法规和C-NCAP类第三方评价规程进行了详细的解读。
The K：【The K 聊汽车安全（1）】带你认识全球汽车碰撞安全法规
不管是什么安全法规，判断安全性能好坏的标准，都是以人为本，从人可能受到伤害的严重程度出发，综合评价，从而给出车辆的安全等级。
那么，如何对人体所受伤害的严重程度进行评价呢？
总体而言，人体伤害一般分为两个评价维度：第一，人体各部位所能承受的机械载荷限值。第二，根据伤害风险曲线来判断载荷作用下发生伤害的可能性。
一般来说，我们按不同的区域将人体的损伤度量区域分为头部、颈部、胸部、下肢。
接下来我将分部位给大家介绍评价捋一捋，针对人体不同区域，汽车工程是如何对所受伤害的严重程度 … ⌘ Read more
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Pinellas County Running: 6.01 miles, 00:10:20 average pace, 01:02:05 duration
was feeling in the flow for the first 2.5 miles and then some lady stopped me in her car to help her get a turtle to the pond. could not get it back afterwards but it was still a fun time out albeit exhausting.
#running
骑行时需要怎么保持正确的呼吸方法？
我在21年底，去上海做fitting follow的时候，和我的fitter：Johnny Chong —— Specialized中国的Master Fitter ，讨论过关于呼吸法的问题和一些基础原理，从中也获益良多，可以和大家分享一下。
如果你不想了解原理，只要在保存气道畅通的情况下了解两点，并且在日常生活中就不断练习到成为习惯：
1.尽量用鼻呼吸，少用或不用口呼吸；
2.学习完全呼吸法，多深呼吸少浅呼吸；
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第三次强调， 自行车运动的本质是有氧耐力和无氧耐力，所以我们如何能够获取并利用更多的氧气来和自身产生氧化反应驱动自身，尽量减少进入无氧区间的可能性，同时在必须要进入无氧区间时能维持更久输出更多，就成了整个自行车运动除技巧外的全部，所有的训练也都是围绕着这个目标来制定的。
 T-Display S3 Pro adds a 2.33” screen and phone OTG support
LILYGO has introduced the T-Display S3 Pro, a solution designed for portable applications that require multi-touch display support. This compact device not only boasts a 400mA battery but also integrates a range of sensors and offers optional IMU support. Similarly as the standard T-Display-S3 released some time ago, this upgraded version accommodates the following ESP32-S3 […] ⌘ Read more
Swift on RISC-V: Launch of New Toolchain for RISC-V Hardware
The Swift programming community has taken a significant step towards embracing open architecture with the announcement of the first Swift toolchain release for RISC-V hardware. This new project, Swift on RISC-V, introduces a complete toolchain that can be installed and used on RISC-V platforms, including the VisionFive 2 single-board computer. As RISC-V’s open-source instruction set […] ⌘ Read more
Pinellas County - Cool down: 2.35 miles, 00:09:59 average pace, 00:23:27 duration
walked about ¾ mile and then started c/d run. felt strong so endurance is in a great spot!
#running
Pinellas County - Warm up: 2.41 miles, 00:09:08 average pace, 00:21:59 duration
included some strides and felt pretty strong
#running
🧮 USERS:1 FEEDS:2 TWTS:1016 ARCHIVED:75590 CACHE:2342 FOLLOWERS:17 FOLLOWING:14
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(Updated) HiFive Unmatched SBC showcases new FU740 RISC-V SoC
SiFive has opened $665 pre-orders on a “HiFive Unmatched” Mini-ITX dev board that can power a PC. The SBC runs Linux on a penta-core, 64-bit SiFive FU740 SoC and offers 2x M.2 and PCIe x16 for graphics. In September when SiFive announced its FU740 (Freedom U740) SoC, the RISC-V chip designer said it would soon […] ⌘ Read more
Banana Pi BPI-M5 Pro Features Octa-core Rockchip RK3576 with 6 TOPS NPU
The Banana Pi BPI-M5 Pro is powered by the Rockchip RK3576 SoC, which includes a 6 TOPS NPU and supports up to 16GB of LPDDR4x RAM. This latest model enhances its predecessor with advanced computing capabilities, featuring dual GbE ports and flexible storage options. Unlike the original Banana Pi BPI-M5 launched in 2020, the new […] ⌘ Read more
《艾尔登法环》新DLC究竟讲了一个什么故事？
揭示了交界地熔炉时代的一段历史，也补全了玛丽卡悲惨的身世。
先来看几段关于熔炉的物品描述:
熔炉全护符:揉合 熔炉百相所有特征 的巨型块状物……据说是 源自巨人身体 的物品。在塔的神话中，此物被称为 熔炉之母。
燃炉面具：弯曲角围绕的那副石面具，据说是来自角人们的传说故事中，所提及的 火焰恶神。
熔炉鳞/羽/瘤护符：“此为生命初始之时的熔炉残存的痕迹，也是 局部性的隔代遗传，在古代具有神圣意义。然而在文明发展后，被视为玷污的象征。”
熔炉百相之角：此为黄金树的初始生命力量，熔炉百相之一。在过去，生命是相互混合，不分彼此。
熔炉薄翼护符：角人们认为熔炉相当神圣——因为在那 历经淬炼的进化尽头，就是他们身上的混生角。
各种角饰品+2:对角人们而言， 角是神圣的象征，也因此证明他们是受选的子民。 其中不停萌发新芽的混生角，则被视为灵力之首的象征。
旋流祷告：塔的祭司们施展的高阶 … ⌘ Read more
WebDAQ Series: Log, Monitor and Control Remotely
The WebDAQ series from Digilent consists of stand-alone data loggers designed for universal input applications, enabling remote system monitoring and control. This series includes three models: WebDAQ 904, WebDAQ 504, and WebDAQ 316, each engineered to cater to specific monitoring needs without the necessity of a personal computer. The WebDAQ 904 model is designed to […] ⌘ Read more
🧮 USERS:1 FEEDS:2 TWTS:1014 ARCHIVED:75547 CACHE:2361 FOLLOWERS:17 FOLLOWING:14
Vitess 20 is now Generally Available
Project post by the Vitess Maintainer Team We’re delighted to announce the release of Vitess 20 along with version 2.13.0 of the Vitess Kubernetes Operator. Version 20 focuses on usability and maturity of existing features, and continues to… ⌘ Read more
为什么燃油车很少刹车失灵，而新能源汽车刹车失灵概率高，这是什么原因？
我觉得横向对比吧，把相同的因素尽可能剔除掉，仅保留明显差异的变量。
因此关于驾驶辅助啊，自动驾驶这些我们先不考虑它。
我觉得其实最主要的因素可以归结到两点：
- 同级别的电动车，在重量上显著高于燃油i车（又在动力上很容易达到高速）
- 电动车为了操作便利性引入的“单踏板模式”对于用户的习惯培养
我们先说第一点： 重量！
将车辆制动下来，在燃油车时代和电动车时代有点小区别：
- 燃油车的制动力，通常包括：发动机制动（来自于泵气损失）+制动系统制动力
- 电动车的制动力，来自于：能量回收力矩+制动系统制动力
而需要制动的动能呢，本身和什么形式无关。只与车辆的速度和质量有关。根据高中物理中包含的动能公式，制动总能量为
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First there was the universe! Well, first there was some requisite boilerplate, but then there was the universe! A 2 dimensional grid, an array of 10 columns and 10 rows.
”`hljs swift
import Foundation
let rows: IntRead more”`