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Background Some studies at home and abroad have discussed the related factors affecting the occurrence of lower limb lymphedema in patients with cervical cancer, but the conclusions are not consistent. Therefore, in this study, meta analysis was used to summarize the risk factors of lower limb lymphedema in patients with cervical cancer, and to explore the characteristics of cervical cancer high-risk population, so as to provide reference for early detection and prevention of lower limb lymphedema. Methods Electronic databases like PubMed, Embase, Cochrane Library, Web of Science, China Biology Medicine Database, China National Knowledge Infrastructure, China Science and Technology Journal Database, and Wanfang Database were consistently and exhaustively searched. Meta analysis of all eligible research results was carried out by using Review Manager 5.3 software. Results We will disseminate the findings of this systematic review and meta-analysis via publications in peer-reviewed journals. Conclusions This study will summarize the risk factors of lower limb lymphedema for cervical cancer and provide evidence for clinical intervention strategies.

In this paper, we propose a method to obtain a constrained approximation of a rational B\'{e}zier curve by a polynomial B\'{e}zier curve. This problem is reformulated as an approximation problem between two polynomial B\'{e}zier curves based on weighted least-squares method, where weight functions $\rho(t)=\omega(t)$ and $\rho(t)=\omega(t)^{2}$ are studied respectively. The efficiency of the proposed method is tested using some examples.

This paper discusses the dimension of spline spaces with highest order smoothness over hierarchical T-meshes over certain type of hierarchical T-meshes. The major step is to set up a bijection between the spline space with highest order smoothness over a hierarchical T-mesh and a univariate spline space whose definition depends on the l-edges of the extended T-mesh. We decompose the univariate spline space into direct sums in the sense of isomorphism using the theory of the short exact sequence in homological algebra. According to the decomposition of the univariate spline space, the dimension formula of the spline space with highest order smoothness over certain type of hierarchical T-mesh is presented. A set of basis functions of the spline space is also constructed.