Capacity Loss From Localization Error in MIMO Channel Using Leaky Coaxial Cable

Leaky coaxial (LCX) cable has been employed as antennas for wireless traffic over many linear-cell scenarios such as railway station, tunnels and shopping malls. In addition, LCX can be used for user localization and wireless power transfer (WPT). Compared with the equal power allocation method, the power allocation method for LCX system using positional information (PI) can improve its capacity with the same level of computational complexity. In this paper, we will investigate the level of capacity loss on the 2.4 GHz and 5 GHz band for the conventional equal power (EP) allocation method, the water-filling (WF) based power allocation, and our proposed low-complexity power allocation method for LCX system with PI. The results show that LCX system with our proposed method using PI can reduce the capacity loss due to localization error than that of others

Exploration on the Historical Roots of “Tibet Independence” From the View of British Military Invasions Into Tibet in Late Qing Dynasty

Since the middle of the 13th century, Tibet has come within the territorial jurisdiction of Chinese government and has been an inseparable part of China’s territory. The problem of so-called “Tibet independence” only appeared in the recent 100 years. It is the outcome of the imperialist aggression, intervention and plotting in modern times, as well as the conspiracy of the western anti-China forces in contemporary times. Looking back at the history of British twice military invasions of Tibet which happened over one hundred years ago and analyzing the reasons for the failure of the Qing administration and Tibetan local government against the British, we can detect the historical roots of so-called “Tibet independence” and have a better understanding towards the nature of the problem, so as to get some enlightenment about how to handle the issue properly in today’s complicated international environment

Case report: Myocardial noncompaction causing massive cerebral infarction in 1 patient with eyelid edema as an early manifestation and literature review

ObjectiveTo summarize and analyze the early clinical manifestations, risk factors, treatment and prognosis of myocardial noncompaction in children, and to provide scientific basis for early and effective intervention.MethodsCombined with a case of myocardial noncompaction with massive cerebral infarction in a child, the related research reports of myocardial noncompaction in children were analyzed retrospectively.ResultsMyocardial noncompaction in children is cardiomyopathy caused by abnormal myocardial compaction during embryonic development. Feeding intolerance, dyspnea, chest tightness, fatigue, eyelid edema and other non-specific manifestations may occur in the early stage. It is easy to miss the diagnosis and misdiagnosis in clinical diagnosis and treatment, leading to intractable heart failure, nausea and arrhythmia, thromboembolism and even sudden death and other serious complications. Early diagnosis, symptomatic treatment, control of complications and regular follow-up can prevent the occurrence of serious complications and reduce mortality.ConclusionThere is no specific clinical manifestation in the early stage of myocardial noncompaction in children. If it is not detected early and treated symptomatically, the prognosis is poor and the mortality is high. Therefore, clinicians should fully improve the understanding of the early clinical manifestations of this disease, give early diagnosis and early intervention to children, reduce the occurrence of serious complications and improve the survival rate

Numerical Simulation of Chemical Spills and Assessment of Environmental Impacts

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv