X_And_Y的博客

C++ referenceC++ Core Guidelines知乎经验，关于学习方法和开源项目的推荐https://www.zhihu.com/question/29112393/answer/511136742一些C++开源库 https://en.cppreference.com/w/cpp/links/libs暂时记录这些

坐标系定义球坐标系(R,θ,ϕ)(R,\theta,\phi)(R,θ,ϕ)，直角坐标系(x,y,z)(x,y,z)(x,y,z)x=Rsin⁡θcos⁡ϕ,  y=Rsin⁡θcos⁡ϕ,  z=Rcos⁡θx=R\sin\theta\cos\phi,\;y=R\sin\theta\cos\phi,\;z=R\cos\thetax=Rsinθcosϕ,y=Rsinθcosϕ,z=Rcosθ球坐标系和直角坐标系单位矢量转换(R^,θ^,ϕ^\hat{R},\hat{\theta},\hat{\phi

证明：n×(H1−H2)=Js\mathbf{n}\times(\mathbf{H}_1-\mathbf{H}_2)=\mathbf{J}_sn×(H1​−H2​)=Js​n\mathbf{n}n 单位法向量H1\mathbf{H}_1H1​，H2\mathbf{H}_2H2​：分界面两侧的磁场Js\mathbf{J}_sJs​是面电流密度如图，t\mathbf{t}t是单位切向量，n...