JS 拷贝：浅拷贝 / 深拷贝原理 + 常用方法

We give an explicit multi-parametric construction for Jenkins-Strebel differentials on real algebraic curves. Roughly speaking, the square of any real holomorphic abelian differential subjected to certain linear restrictions will be a JS quadratic differential.

We propose an $\ell_1$-penalized estimation procedure for high-dimensional linear mixed-effects models. The models are useful whenever there is a grouping structure among high-dimensional observations, i.e. for clustered data. We prove a consistency and an oracle optimality result and we develop an algorithm with provable numerical convergence. Furthermore, we demonstrate the performance of the method on simulated and a real high-dimensional data set.

近年来，在桥梁修建的过程中，基本都是使用现浇箱梁，贝雷梁柱支架的使用频率越来越高。因此，这就给后续的拆除工作带来了极大挑战。基于此，论文以某地某工程为例，进一步分析该类支架的整体卸载与拆除技术，以供参考。