Automatic landmark annotation and dense correspondence registration for 3D human facial images

Dense surface registration of three-dimensional (3D) human facial images holds great potential for studies of human trait diversity, disease genetics, and forensics. Non-rigid registration is particularly useful for establishing dense anatomical correspondences between faces. Here we describe a novel non-rigid registration method for fully automatic 3D facial image mapping. This method comprises two steps: first, seventeen facial landmarks are automatically annotated, mainly via PCA-based feature recognition following 3D-to-2D data transformation. Second, an efficient thin-plate spline (TPS) protocol is used to establish the dense anatomical correspondence between facial images, under the guidance of the predefined landmarks. We demonstrate that this method is robust and highly accurate, even for different ethnicities. The average face is calculated for individuals of Han Chinese and Uyghur origins. While fully automatic and computationally efficient, this method enables high-throughput analysis of human facial feature variation.Comment: 33 pages, 6 figures, 1 tabl

Astrophysical constraints on the proton-to-electron mass ratio with FAST

That the laws of physics are the same at all times and places throughout the Universe is one of the basic assumptions of physics. Astronomical observations provide the only means to test this basic assumption on cosmological time and distance scales. The possibility of variations in the dimensionless physical constant {\mu} - the proton-to-electron mass ratio, can be tested by comparing astronomical measurements of the rest frequency of certain spectral lines at radio wavelengths with laboratory determinations. Different types of molecular transitions have different dependencies on {\mu} and so observations of two or more spectral lines towards the same astronomical source can be used to test whether there is any evidence for either temporal or spatial changes in the physical fundamental constants. {\mu} will change if the relative strength of the strong nuclear force compared to the electromagnetic force varies. Theoretical studies have shown that the rotational transitions of some molecules which have transitions in the frequency range that will be covered by FAST (e.g., CH3OH, OH and CH) are sensitive to changes in {\mu}. A number of studies looking for possible variations in {\mu} have been undertaken with existing telescopes, however, the greater sensitivity of FAST means it will open new opportunities to significantly improve upon measurements made to date. In this paper, we discuss which molecular transitions and sources (both in the Galaxy and external galaxies) are likely targets for providing improved constraints on {\mu} with FAST

Tighter weighted polygamy inequalities of multipartite entanglement in arbitrary-dimensional quantum systems

We investigate polygamy relations of multipartite entanglement in arbitrary-dimensional quantum systems. By improving an inequality and using the $\beta$th ($0\leq\beta\leq1$) power of entanglement of assistance, we provide a new class of weighted polygamy inequalities of multipartite entanglement in arbitrary-dimensional quantum systems. We show that these new polygamy relations are tighter than the ones given in [Phys. Rev. A 97, 042332 (2018)]

子宫背带式缝合术在重度子痫前期患者剖宫产术中的必要性研究

Objectives: To explore the necessity of the application of B-lynch suturing technique (brace suture) combined with uterotonics during C-section in patients in early stage of severe eclampsia. Methods: 216 subjects were selected in study group to receive B-Lynch suturing technique during C-section while 282 subjects were selected in control group to receive traditional suturing technique. The duration of C-section procedure, the incidence of postpartum hemorrhage, the hemorrhage volume, the puerperal morbidity and therapeutic effect between the two groups were compared. Results: The clinical results of the study group was remarkable, and there was a significant statistical difference of the postpartum hemorrhage volume, the incidence of postpartum hemorrhage, anemia and blood transfusion between the two groups (p<0.05). No subject has either undergone a second surgical intervention, hysterectomy or experienced other complications in the study group. The uterus of the subjects of the study group returned to normal in due time and their menstruation reappeared normally. Conclusion: The B-Lynch suturing technique has many advantages such as: simplicity of application, quick hemostasis, life-saving potential, relative safety and capacity for preserving the uterus and subsequent fertility. Its application in patients with early stage severe eclampsia can prevent the incidence of postpartum hemorrhage, anemia and subsequent blood transfusion. It is an effective method to prevent post C-section hemorrhage in patients with severe eclampsia.目的  探讨子宫背带式缝合术联合缩宫素应用在重度子痫前期患者剖宫产术中的必要性。方法  研究组216例剖宫产术中采用子宫背带式缝合术治疗；282例作为对照组剖宫产术中采用传统方法，在手术时间、产后出血发生率、产后出血量、产褥病率以及治疗效果等方面对比两组术式的临床疗效。结果  研究组病例治疗后临床效果显著 ，产后出血量、产后出血发生人数、贫血人数及输血量与对照组比较差异有统计学意义( P< 0 .05 )，无一例因血液循环不良或再出血而再次手术或子宫切除，无并发症发生，子宫复旧、月经复潮时间无异常。结论  子宫背带式缝合术具有操作简单 、止血迅速及安全易行等诸多优点，重度子痫前期剖宫产术中应用可预防产后出血发生，减少贫血及输血患者，并且能够减少输血量，是预防重度子痫前期剖宫产产后出血行之有效的方法

Ordering states with various coherence measures

Quantum coherence is one of the most significant theories in quantum physics. Ordering states with various coherence measures is an intriguing task in quantification theory of coherence. In this paper, we study this problem by use of four important coherence measures -- the $l_1$ norm of coherence, the relative entropy of coherence, the geometric measure of coherence and the modified trace distance measure of coherence. We show that each pair of these measures give a different ordering of qudit states when $d\geq 3$. However, for single-qubit states, the $l_1$ norm of coherence and the geometric coherence provide the same ordering. We also show that the relative entropy of coherence and the geometric coherence give a different ordering for single-qubit states. Then we partially answer the open question proposed in [Quantum Inf. Process. 15, 4189 (2016)] whether all the coherence measures give a different ordering of states.Comment: 12 page

Amending coherence-breaking channels via unitary operations

The coherence-breaking channels play a significant role in quantum information theory. We study the coherence-breaking channels and give a method to amend the coherence-breaking channels by applying unitary operations. For given incoherent channel $\Phi$, we give necessary and sufficient conditions for the channel to be a coherence-breaking channel and amend it via unitary operations. For qubit incoherent channels $\Phi$ that are not coherence-breaking ones, we consider the mapping $\Phi\circ\Phi$ and present the conditions for coherence-breaking and channel amendment as well.Comment: 8 page