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Severe Pneumonia Caused by Balneatrix alpica Associated with Spa

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Biomedical and Environmental Sciences 2023年第2期36卷 191-195页

作者： wu Ruo LU Xue Jun wu Ze ZHENG Yong xian Department of Emergency Medicine Central South University Xiangya School of Medicine Affiliated Haikou HospitalHaikou 570208HainanChina

Balneatrix alpica is a non-fermentative,oxidasepositive,and gram-negative bacillus with a single polar *** optimum growth temperature is 30℃,with a range of 20–46℃[1,2].It is transmitted via contact and air-borne spread from hot *** shows increased susceptibility in the elderly,especially males,and the incubation period ranges from 2 to 17 *** and meningitis were observed in Balneatrix alpica cases.

关键词： cases susceptibility optimum

IRS-Aided SWIPT Systems with Power Splitting and Artificial Noise

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China Communications 2022年第4期19卷 108-120页

作者： Baogang Li Fuqiang si Dongsheng Han wujing wu Department of Electronic and Communication Engineering North China Electric Power UniversityBaoding 071003HebeiChina Hebei Key Laboratory of Power Internet of Things Technology North China Electric Power UniversityBaoding 071003HebeiChina

Intelligent reflecting surface(IRS) is regarded as a promising technology because it can achieve higher passive beamforming gain. In particular, the IRS assisted simultaneous wireless information and power transfer(SWIPT) system can make the information decoding receivers(IDRs) have a higher signal-to-noise ratio(SNR), and the energy harvesting receivers(EHRs) have the guarantee of minimum harvested energy threshold. Motivated by the above,in this paper, we use the power splitting(PS) at the user and introduce artificial noise(AN) into the access point(AP), so that the user in system can harvest energy and decode information simultaneously,further improve the security of user. We jointly optimize the beamforming matrix at AP, the reflection phase shift at IRS and the PS ratio, in order to maximize the user’s achievable secrecy rate, subject to the user’s minimum harvested energy threshold and AP’s transmission power. Due to the introduction of PS ratio, the coupling between variables is increased,and the complexity of the problem is significantly increased. Furthermore, the problem is non-convex, so we propose an efficient algorithm based on Taylor Formula, semi-definite relaxation(SDR) and alternating optimization(AO) to get the solution. Numerical results show that the proposed IRS-SWIPT system with PS and AN achieves significant performance improvement compared with other benchmark scheme.

关键词： intelligent reflecting surface(IRS) passive beamforming power splitting SWIPT

Neuroprotection of Cyperus esculentus L. orientin against cerebral ischemia/reperfusion induced brain injury

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Neural Regeneration Research 2020年第3期15卷 548-556页

作者： si-Qun Jing Sai-Sai Wang Rui-Min Zhong Jun-Yan Zhang Jin-Zi wu Yi-xian Tu Yan Pu Liang-Jun Yan Yingdong College of Food Science and Engineering Shaoguan UniversityShaoguanGuangdong ProvinceChina School of Bioengineering Jiangnan UniversityWuxiJiangsu ProvinceChina Department of Pharmaceutical Sciences UNT System College of PharmacyUniversity of North Texas Health Science CenterFort WorthTXUSA College of Life Sciences and Technology Xinjiang UniversityUrumqiXinjiang Uygur Autonomous RegionChina

Orientin is a flavonoid *** recent years,its importance as a source of pharmacological active substance is growing rapidly due to its properties such as anti-myocardial ischemia,anti-apoptosis,anti-radiation,anti-tumor,and ***,the neuroprotective effects of Orientin on stroke injury have not been comprehensively *** aim of the present study was thus to investigate the neuroprotective capacity and the potential mechanisms of Cyperus esculentus ***(CLO)from Cyperus esculentus *** against ischemia/reperfusion(I/R)injury using standard orientin as *** in vitro studies,we treated HT22 cells with CoCl2 as an in vitro ischemic injury ***22 cells in the control group were treated with *** in vivo studies,we used rat models of middle cerebral artery occlusion,and animals that received sham surgery were used as *** found that CLO protected CoCl2-induced HT22 cells against ischemia/reperfusion injury by lowering lipid peroxidation and reactive oxygen species formation as well as decreasing protein ***,CLO did not reduce the release of lactate dehydrogenase nor increase the activity of superoxide *** showed that CLO could decrease neurological deficit score,attenuate brain water content,and reduce cerebral infarct volume,leading to neuroprotection during cerebral ischemia-reperfusion *** studies indicate that CLO flavonoids can be taken as a natural antioxidant and bacteriostastic substance in food and pharmaceutical *** molecular mechanisms of CLO could be at least partially attributed to the antioxidant properties and subsequently inhibiting activation of *** experimental procedures and protocols were approved on May 16,2016 by the Experimental Animal Ethics Committee of Xinjiang Medical University of China(approval ***20160516-57).

关键词： antioxidants caspase-3 cerebral ischemia/reperfusion injury cobalt chloride Cyperus esculentus L.orientin(CLO) lipid peroxidation nerve regeneration neurological deficits oxidative stress reactive oxygen species

significance of achieving carbon neutrality by 2060 on China's energy transition pathway: A multi-model comparison analysis

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Advances in Climate Change Research 2023年第1期14卷 32-42页

作者： Ling-si KONG xian-Chun TAN Bai-He GU Hong-Shuo YAN Institutes of Science and Development Chinese Academy of SciencesBeijing 100190China School of Public Policy and Management University of Chinese Academy of SciencesBeijing 100049China Center for Carbon Neutrality Strategy Institutes of Science and DevelopmentChinese Academy of SciencesBeijing 100190China

China has proposed to achieve carbon neutrality by *** previous studies have assessed net-zero emissions pathways in China,the diversity observed in these studies in terms of model construction and parameter setting has led to inconsistent conclusions on some key issues,such as energy *** study employs a multi-model comparison method to examine the significance of China's carbon neutrality target on its energy systems by assessing 67 carbon neutrality scenarios in China that are collected from the ADVANCE database,and identifying the differences between energy transition pathways under BEF60 scenarios(*** realising carbon neutrality by 2060)and AFT60 scenarios(*** realising carbon neutrality after 2060).Results show that China needs a larger deployment of low-carbon electricity,a higher electrification rate and more carbon sequestration amount under BEF60 scenarios than those under AFT60 ***,the magnitude of the difference between the two categories of scenarios varies significantly in terms of different outcome *** that present significant disparities include the deployment scale of solar power(increasing by 160%),the electrification rate of the building sector(increasing by 27%)and the carbon sequestration amount of biomass power with carbon capture and storage(increasing by 380%).In addition,this study selects six indicators to present the technological and economic characteristics of various energy systems of China at the point of net-zero *** the relationships between characteristics,this research identifies the common features among various net-zero energy systems.A great share of non-biomass renewable power generation is always associated with a relatively high per capita energy use,implying that high renewables penetration may relax restrictions on energy consumption,which should be addressed for China when making efforts to promote energy transition.

关键词： Carbon neutrality Multi-model comparison analysis Energy transition Technology option Common feature

JMNet: A joint matting network for automatic human matting

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Computational Visual Media 2020年第2期6卷 215-224页

作者： xian wu Xiao-Nan Fang Tao Chen Fang-Lue Zhang Department of Computer Science and Technology Tsinghua UniversityBeijing100084China AI Center at Visual China Group BurlingameCA94010USA School of Engineering and Computer Science Victoria University of WellingtonWellingtonNew Zealand

We propose a novel end-to-end deep learning framework, the Joint Matting Network(JMNet), to automatically generate alpha mattes for human *** utilize the intrinsic structures of the human body as seen in images by introducing a pose estimation module,which can provide both global structural guidance and a local attention focus for the matting task. Our network model includes a pose network, a trimap network, a matting network, and a shared encoder to extract features for the above three networks. We also append a trimap refinement module and utilize gradient loss to provide a sharper alpha matte. Extensive experiments have shown that our method outperforms state-of-theart human matting techniques;the shared encoder leads to better performance and lower memory *** model can process real images downloaded from the Internet for use in composition applications.

关键词： alpha matting human images deep learning pose estimation

Synergistic effects of vegetation layers of maize and potato intercropping on soil erosion on sloping land in Yunnan Province, China

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Journal of Mountain Science 2020年第2期17卷 423-434页

作者： ZHANG Xiao-yun wu Kai-xian FULLEN Michael A wu Bo-zhi Faculty of Agronomy and Biotechnology Yunnan Agricultural UniversityKunming 650201China Faculty of Technology and Engineering The University of WolverhamptonWulfruna StreetWolverhamptonWV11LYUK

Intercropping, as an overyielding system, can decrease soil erosion on sloping land through the presence of dense canopy covers. However, the structure mechanism in canopy is still unclear. We conducted a two-year field experiment on runoff plots, exploring whether the interaction between vegetation layers reduce soil erosion in maize and potato intercropping systems. The maize, potato, and weed layers in the intercropping system were removed by a single layer, two layers and three layers, respectively(total of 8 treatments including all layers removed as the control). Then, throughfall, runoff and sediment were measured at the plot and row scale on a weekly basis. Based on the difference between each treatment and the control, we calculated and found a relative reduction of runoff and sediment by any combination of the two vegetation layers greater than the sum of each single layer. In 2016 and 2017, the highest relative reduction of runoff reached 15.65% and 46.73%, respectively. Sediment loss decreased by 33.96% and 42.77%, respectively. Moreover, runoffand sediment reduced by the combination of all vegetation layers(no layers removed) was also larger than the sum of that by each single layer. In 2016 and 2017, the highest relative reduction of runoff reached 7.32% and 3.48%, respectively. So, there were synergistic effects among multi-level(two or three layers) vegetation layers in terms of decreasing soil erosion on sloping land. Maize redistributes more throughfall at the maize intra-specific row and the maize and potato inter-specific, which is favorable for the synergistic effect of reducing soil erosion. This finding shows an important mechanism of maize and potato intercropping for soil and water conservation, and may promote the application of diverse cropping systems for sustainable agriculture in mountainous areas.

关键词： Synergistic effect Vegetation layer Soil erosion Intercropping Maize Potato

Role of microRNAs in endothelial function

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Chinese Medical Journal 2013年第9期126卷 1779-1786页

作者： CHEN xian-bing ZHENG si-dao wu Hong-jin Clinical Trials Centre Department of Cardiology Beijing Hospital of Integrated Traditional Chinese and Western Medicine Beijing 100039 China

MicroRNAs （miRNAs） are a class of short, single-stranded, noncoding RNAs that modulate avariety of biological functions as negative regulators gene expression. Post-transcriptional regulation of by miRNAs is crucial in many aspects including cell proliferation and death. They play important regulatory roles in endothelial cell function, which are significant for the treatment of endothelial dysfunction and related metabolic disorders. This review summarizes current insights into the functions of miRNAs, focusing specifically on the regulation of endothelial function.

关键词： microRNA endothelial cell gene regulation

Stratosphere-troposphere synergetic effect on the extreme low-temperature event over China in late November 2022

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Advances in Climate Change Research 2023年第5期14卷 671-680页

作者： Ying-xian ZHANG Dong si Yan-Ju LIU Mei MEI Guo-Fu WANG China Meteorological Administration Climate Studies Key Laboratory Beijing 100081China National Climate Centre China Meteorological AdministrationBeijing 100081China Climate Change Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

In late November 2022,most regions in China were hit by a strong northwest-path cold wave,bringing a high-hazard extreme low-temperature event(ELTE).Several parts of Northwest China experienced extremely low temperatures and record-breaking snow depths.A stratosphere-troposphere synergetic effect was suggested to be closely related to the ELTE according to a diagnostic *** the one hand,the concurrent establishment of two blockings in Europe-Northeast Atlantic and North Pacific led to a polar vortex split at the tropopause,and the Arctic Oscillation phase subsequently turned *** airflow with high potential vorticity(PV)was squeezed out of the ***,a high-PV air that originated from the lower stratospheric Arctic was conveyed southwards to the western siberian Plain along the sloping isentropic *** condition triggered a tropospheric response in which the East Asia trough deepened due to the intensified cyclonic circulation induced by the high-PV *** the other hand,downward propagation of stratospheric anomalies accompanied by stratospheric polar vortex displacement and split was observed in mid-and late November,*** in stratospheric circulation contributed to enhanced blockings over Europe-Northeast Atlantic in the lower stratosphere or upper *** a result,the inverted omega-shaped circulation pattern was formed in the middle to upper troposphere,and it consisted of the intensified East Asia trough and two blockings in the upstream and downstream *** high-PV air upstream of the East Asia trough was advected to China,which directly led to the outbreak of the *** establishment of double blockings and the displacement or split of the stratospheric polar vortex can be efficient signals for cold-event prediction in *** study provides novel insights into the cause of ELTEs under warming climates in the future.

关键词： Extreme low-temperature event Synergetic effect Blockings Polar vortex Potential vorticity

Role of unsteady tip leakage flow in acoustic resonance inception of a multistage compressor

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Chinese Journal of Aeronautics 2023年第10期36卷 165-181页

作者： Xiaohua LIU Zihao wu Changxin si Jun YANG Xiaofeng SUN School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory(Fluid Machinery and Engineering Research Base)of sichuan Province Xihua UniversityChengdu 610039China China Three Gorges Investment Management Co.Ltd Shanghai 200124China School of Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai 200093China Research Institute of Aero-Engine Beihang UniversityBeijing 100191China

In previous studies,a theoretical model was developed after Acoustic Resonance(AR)was experimentally detected in a four-stage compressor,and AR inception was proposed to be triggered by an unknown sound source,which is a pressure perturbation of a specific frequency with a suitable circumferential propagation *** present paper,which is not dedicated to the simulation of acoustic field,aims to identify the specific sound source generated by the unsteady tip leakage flow using the unsteady Computational Fluid Mechanics(CFD)*** a comprehensive analysis of an Unsteady Reynolds Averaged Navier-Stokes(URANS)simulation,a pressure perturbation of non-integer multiple of rotor frequency is found at the blade *** the essence of the tip leakage flow is a jet flow driven by the pressure difference between two sides of blade,a simplified tip leakage flow model is adopted using Large Eddy simulation(LES)in order to simulate the jet flow through a tip *** is found that the convection velocity of shedding vortices fits the expected propagation speed of the sound source,the frequency is also close to one of the dominating frequencies in the URANS simulation,and the resultant combination frequency coincides with the experimentally measured AR *** such a simplified model successfully captures the key physical mechanisms,it is concluded that this paper provides a piece of unambiguous evidence on the role of unsteady tip leakage vortex in triggering the AR inception of the multistage compressor.

关键词： Acoustic Resonance(AR) Jet flow Multistage compressor Tip leakage flow Unsteady flow