This study introduces and verifies a relative navigation technique for two CubeSats in formation flying as part of the CANYVAL-C mission. Because the mission requires precision and robustness subject to restricted computational complexity, the technique employs an Extended Kalman Filter (EKF) and raw...
Reproduction steps openjdk 17 and 21 scala version 2.13.10 and 2.13.14 and 2.13.15 sbt version 1.10.1 and 1.10.2 build.sbt scalaVersion := "2.13.14" // or other 2.13.x versions trait ParentTrait extends Any { def value: String } class Ch...
AnyVal 是⼀个 abstract 类，继承 Any，⽬的是取代 primary 类型 AnyRef 是⼀个 trait，继承 Any，重写了 Any 中部分⽅法 Any 和 Object 定义上没有任何关系 AnyRef 和 Object 定义上没有任何关系 scala 的继承体系是通过 Any、AnyRef 实现的。为了兼容 java 的继承体系，scala 编译器将 AnyRef 置于与...
错误消息 "value <= is not a member of any" 表示<= 操作符不适用于 min 或max 的数据类型。在Scala中,这通常意味着 min 或max 的类型不是数值类型(如 Int、Double 等),或者它们可能是 Null 类型。 分析代码: 出错的代码是 min <= visitcount && max > visitcount。这里...
例如,type_name_of_val::<Option<String>>(None) 可以返回 "Option<String>" 或"std::option::Option<std::string::String>",但不能返回 "foobar"。 此外,输出可能会在编译器的版本之间改变。 此函数不能解析 trait 对象,这意味着 type_name_of_val(&7u32 as &dyn Debug) 可以返回 "dyn Debug",但...
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telescoperelative attitudeCurrent space telescopes have a single structure, and consequently, their focal length cannot be increased sufficiently. Sometimes, this problem may prevent the improvement of the resolution of the telescope. To solve this problem, the concept of virtual telescope has been ...
CANYVAL-X mission is developed for demonstrating a virtual telescope alignment system. The main objective of this mission is to build an inertial alignment of a virtual telescope with respect to the Sun during a few minutes by using two CubeSats, Tom(2U) and Jerry(1U). Inertial alignment is...
Head & NeckSentinel Node BiopsyBACKGROUND: metastasis from cutaneous squamous (cSCC) is poorly predicted clinically and is associated with a high mortality rate.: From 2010 to 2013, patients with high-risk cSCC...
THE LEGENDARY C-47: A GOONEY BY ANY OTHER NAMEDiscusses the United States military's use of C-47 transport plane during World War II. Start of manufacture of C-47 in 1940; Military pi...