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| 1 | Node Ranking Strategy in Virtual Network Embedding: An Overview显示文摘Network virtualization(NV)is a highprofile way to solve the ossification problem of the nowadays Internet,and be able to support the diversified network naturally.In NV,Virtual Network Embedding(VNE)problem has been widely considered as a crucial issue,which is aimed to embed Virtual Networks(VNs)onto the shared substrate networks(SNs)efficiently.Recently,some VNE approaches have developed Node Ranking strategies to drive and enhance the embedding efficiency.Node Ranking Strategy rank/sort the nodes according to the attributes of the node,including both residual local attributes(CPU,Bandwidth,storage,Etc.)and the global topology attributes(Number of neighborhood Nodes,Delay to other nodes,Etc.).This paper presents an overview of Node Ranking Strategies in Virtual Network Embedding,and possible directions of VNE Node Ranking Strategy. | Shengchen Wu Hao Yin Haotong Cao Longxiang Yang Hongbo Zhu | 2021 | China Communications2021，18，6： | 3 |
| 2 | Impact of self-heating effects on nanoscale Ge p-channel Fin FETs with Si substrate显示文摘In this paper, self-heating effects(SHE) in nanoscale Ge p-channel Fin FETs with Si substrate are evaluated by TCAD simulation. Hydrodynamic transport with modified mobilities and Fourier′s law of heat conduction with modified thermal conductivities are used in the simulation. Ge p-channel single-fin Fin FET devices with different S/D extension lengths and fin heights, and multi-fin Fin FETs with different fin numbers and fin pitches are successively investigated. Boundary thermal resistances at source, drain and gate contacts are set to 2000 μm^2 K/W and the substrate thermal boundary condition is set to 300 K so that the source and drain heat dissipation paths are the first two heat dissipation paths. The results are listed below:(i) 14 nm Ge p-channel single-fin Fin FETs with a 47 nm fin pitch experience 9.7% on-state current degradation.(ii) Considering the same input power, Fin FETs with a longer S/D extension length show a higher lattice temperature and a larger on-state current degradation.(iii) Considering the same input power, Fin FETs with a taller fin height show a higher lattice temperature.(iv) The temperature in multi-fin Fin FET devices will first increase then saturate with the increasing fin number. At last, thermal resistances in Ge p-channel single-fin Fin FETs and multi-fin Fin FETs are investigated. | Longxiang YIN Lei SHEN Hai JIANG Gang DU Xiaoyan LIU | 2018 | Science China(Information Sciences)2018，61，6： | 3 |
| 3 | Impact of ambient temperature on the self-heating effects in FinFETs显示文摘We use an electro-thermal coupled Monte Carlo simulation framework to investigate the self-heating effect(SHE) in 14 nm bulk n Fin FETs with ambient temperature(T_A) from 220 to 400 K. Based on this method, nonlocal heat generation can be achieved. Contact thermal resistances of Si/Metal and Si/Si O_2 are selected to ensure that the source and drain heat dissipation paths are the first two heat dissipation paths. The results are listed below:(i) not all input power(Q_(input) turns into heat generation in the device region and some is taken out by the thermal non-equilibrium carriers, owing to the serious non-equilibrium transport;(ii) a higher T_A leads to a larger ratio of input power turning into heat generation in the device region at the same operating voltages;(iii) SHE can lead to serious degradation in the carrier transport, which will increase when T_A increases;(iv) the current degradation can be 8.9% when V_(ds) = 0.7 V, V_(gs) = 1 V and TA = 400 K;(v) device thermal resistance(R_(th)) increases with increasing of T_A, which is seriously impacted by the non-equilibrium transport. Hence, the impact of TA should be carefully considered when investigating SHE in nanoscale devices. | Longxiang Yin Gang Du Xiaoyan Liu | 2018 | Journal of Semiconductors2018，39，9： | 2 |
| 4 | Impact of crystal orientation and surface scattering on DG-MOSFETs in quasi-ballistic region显示文摘The characteristics of nano scale n-type double gate MOSFETs with(100) and(110) surfaces are studied using 3 D full band ensemble Monte Carlo simulator. The anisotropic surface scattering mechanism is investigated. The(100) case is sensitive to the gate voltage more than the(110) case. The impact of crystal orientation and surface scattering on transport features mainly reflects in the carrier velocity distribution. The electron transport features with(100) direction are greater than that with(110) direction, but are more likely to be affected by the surface scattering. | Lei Shen Shaoyan Di Longxiang Yin Yun Li Xiaoyan Liu Gang Du | 2018 | Journal of Semiconductors2018，39，7： | 2 |
| 5 | An MAP kinase interacts with LHK1 and regulates nodule organogenesis in Lotus japonicus显示文摘Symbiosis receptor-like kinase(SymRK) is a key protein mediating the legume-Rhizobium symbiosis.Our previous work has identified an MAP kinase kinase,SIP2,as a SymRK-interacting protein to positively regulate nodule organogenesis in Lotus japonicus,suggesting that an MAPK cascade might be involved in Rhizobium-legume symbiosis.In this study,LjMPK6 was identified as a phosphorylation target of SIP2.Stable transgenic L.japonicus with RNAi silencing of LjMPK6 decreased the numbers of nodule primordia(NP) and nodule,while plants overexpressing LjMPK6 increased the numbers of nodule,infection threads(ITs),and NP,indicating that LjMPK6 plays a positive role in nodulation.LjMPK6 could interact with a cytokinin receptor,LHK1 both in vivo and in vitro.LjMPK6 was shown to compete with LHP1 to bind to the receiver domain(RD) of LHK1 and to downregulate the expression of two LjACS(1-aminocyclopropane-1-carboxylic acid synthase) genes and ethylene levels during nodulation.This study demonstrated an important role of LjMPK6 in regulation of nodule organogenesis and ethylene production in L.japonicus. | Jun Yin Xiaomin Guan Heng Zhang Longxiang Wang Hao Li Qing Zhang Tao Chen Zeyuan Xu Zonglie Hong Yangrong Cao Zhongming Zhang | 2019 | Science China(Life Sciences)2019，62，9： | 1 |
| 6 | Calibration of drift-diffusion model in quasi-ballistic transport region for Fin FETs显示文摘In the past few years, conventional digital IC technologies have developed rapidly and the device structures have shrunk down to the quasi-ballistic region which strongly affects the device characteristics.The usage of the steady-state transport model and the parameters of the drift-diffusion(DD) method may not correctly model the performance of these devices, including the velocity distributions of the carriers. Several previous studies have suggested modifying the transport parameters of the DD model to continue using it in the quasi-ballistic region. In this paper, a Monte Carlo(MC) simulator is used to calibrate the transport parameters of the DD model for silicon Fin FETs. The device features obtained via the parameter-calibrated DD model fit well with the MC simulator. The trends of the calibration factors are also investigated for varying drain voltage, gate voltage, fin width and gate length. | Lei SHEN Shaoyan DI Longxiang YIN Xiaoyan LIU Gang DU | 2018 | Science China(Information Sciences)2018，61，6： | 1 |
| 7 | Modeling and characterizing the typical under-ice acoustic channel for the Arctic显示文摘The properties of arctic underwater acoustic channel were researched using BurkeTwersky(BT) model and ray theory.In the BT model,sea ice ridge is assumed as a set of semi-elliptical cylinder randomly distributed on a stress-free surface.By approximation of low frequency and high frequency of the BT model,the reflection coefficients were calculated at different frequencies.On the basis of ray theory,the acoustic field was calculated and the properties of underwater acoustic channel was analyzed.Compared to underwater acoustic channel properties when the boundary is air,the results show that under the ice surface some sound rays disappear during transmission,because the ice surface reflection coefficients is less than absolute soft surface.Especially,the higher the frequency,the higher the under-ice transmission loss.As a result,under-ice condition is unfavourable for acoustic signals to travel far.Besides,as to the channel structure,the reflection coefficient of ice layer is smaller,the channel multi-path structure is not significant compared to water-air interface without ice.The research results are valuable for our understanding of hydroacoustic channel and the prediction of the sonar system working in the polar region. | ZHU Guangping YIN Jingwei ZHOU Huanling CHEN Wenjian HU Siwei GUO Longxiang | 2019 | Chinese Journal of Acoustics2019，38，2： | 1 |
| 8 | cAMP-PGC1α途径诱导的抗Warburg效应驱动胶质母细胞瘤细胞分化为星形胶质细胞显示文摘文章简介多形性胶质母细胞瘤(GBM)是人类最具侵袭性的肿瘤之一。虽然分化治疗已被提出作为治疗GBM的潜在方法,但诱导分化的机制仍然很不清楚。在此,课题组利用c AMP激活剂建立了GBM诱导分化模型,该模型特异性地指导GBM分化为星形胶质细胞。 | Fan Xing Yizhao Luan Jing Cai Sihan Wu Jialuo Mai Jiayu Gu Haipeng Zhang Kai Li Yuan Lin Xiao Xiao Jiankai Liang Yuan Li Wenli Chen Yaqian Tan Longxiang Sheng Bingzheng Lu Wanjun Lu Mingshi Gao Pengxin Qiu Xingwen Su Wei Yin Jun Hu Zhongping Chen Ke Sai Jing Wang Furong Chen Yinsheng Chen Shida Zhu Dongbing Liu Shiyuan Cheng 谢志 朱文博 颜光美 | 2018 | 科学新闻2018，0，4： | 1 |
| 9 | Evaluation of ICUs and weight of quality control indicators:an exploratory study based on Chinese ICU quality data from 2015 to 2020显示文摘This study aimed to explore key quality control factors that affected the prognosis of intensive care unit(ICU)patients in Chinese mainland over six years(2015–2020).The data for this study were from 31 provincial and municipal hospitals(3425 hospital ICUs)and included 2110685 ICU patients,for a total of 27607376 ICU hospitalization days.We found that 15 initially established quality control indicators were good predictors of patient prognosis,including percentage of ICU patients out of all inpatients(%),percentage of ICU bed occupancy of total inpatient bed occupancy(%),percentage of all ICU inpatients with an APACHE II score≥15(%),three-hour(surviving sepsis campaign)SSC bundle compliance(%),six-hour SSC bundle compliance(%),rate of microbe detection before antibiotics(%),percentage of drug deep venous thrombosis(DVT)prophylaxis(%),percentage of unplanned endotracheal extubations(%),percentage of patients reintubated within 48 hours(%),unplanned transfers to the ICU(%),48-h ICU readmission rate(%),ventilator associated pneumonia(VAP)(per 1000 ventilator days),catheter related blood stream infection(CRBSI)(per 1000 catheter days),catheter-associated urinary tract infections(CAUTI)(per 1000 catheter days),in-hospital mortality(%).When exploratory factor analysis was applied,the 15 indicators were divided into 6 core elements that varied in weight regarding quality evaluation:nosocomial infection management(21.35%),compliance with the Surviving Sepsis Campaign guidelines(17.97%),ICU resources(17.46%),airway management(15.53%),prevention of deep-vein thrombosis(14.07%),and severity of patient condition(13.61%).Based on the different weights of the core elements associated with the 15 indicators,we developed an integrated quality scoring system defined as F score=21.35%xnosocomial infection management+17.97%xcompliance with SSC guidelines+17.46%×ICU resources+15.53%×airway management+14.07%×DVT prevention+13.61%×severity of patient condition.This evidence-based quality scoring system will help in assessing the key elements of quality management and establish a foundation for further optimization of the quality control indicator system. | Longxiang Su Xudong Ma Sifa Gao Zhi Yin Yujie Chen Wenhu Wang Huaiwu He Wei Du Yaoda Hu Dandan Ma Feng Zhang Wen Zhu Xiaoyang Meng Guoqiang Sun Lian Ma Huizhen Jiang Guangliang Shan Dawei Liu Xiang Zhou China-NCCQC | 2023 | Frontiers of Medicine2023，17，4： | 0 |
| 10 | Under-ice ambient noise in the Arctic Ocean: observations at the long-term ice station显示文摘Under-ice ambient noise in the Arctic Ocean is studied using the data recorded by autonomous hydrophones at the long-term ice station during the 9th Chinese National Arctic Research Expedition.Time-frequency analysis of two 7-s-long ice-induced noise samples shows that both ice collision and ice breaking noise have many outliers in the time-domain(impulsive characteristic)and abundant frequency components in the frequency-domain.Ice collision noise lasts for several seconds while the duration of ice breaking noise is much shorter(i.e.,less than tens of milliseconds).Gaussian distribution and symmetric alpha stable(sαs)distribution are used in this paper to fit the impulsive under-ice noise.The sαs distribution can achieve better performance as it can track the heavy tails of impulsive noise while Gaussian distribution fails.This paper also analyzes the meteorological variables during the under-ice noise observation experiment and deduces that the impulsive ambient noise was caused by the combined force of high wind speed and increasing atmosphere temperature on the ice canopy.The Pearson correlation coefficients between long-term power spectral density variations of under-ice ambient noise and meteorological variables are also studied in this paper. | Xiao Han Jingwei Yin Yanming Yang Hongtao Wen Longxiang Guo | 2020 | Acta Oceanologica Sinica2020，39，9： | 0 |
| 11 | Multidimensional dynamic prediction model for hospitalized patients with the omicron variant in China显示文摘Purpose:To establish dynamic prediction models by machine learning using daily multidimensional data for coronavirus disease 2019(COVID-19)patients.Methods:Hospitalized COVID-19 patients at Peking Union Medical College Hospital from Nov 2nd,2022,to Jan 13th,2023,were enrolled in this study.The outcome was defined as deterioration or recovery of the patient's condition.Demographics,comorbidities,laboratory test results,vital signs,and treatments were used to train the model.To predict the following days,a separate XGBoost model was trained and validated.The Shapley additive explanations method was used to analyze feature importance.Results:A total of 995 patients were enrolled,generating 7228 and 3170 observations for each prediction model.In the deterioration prediction model,the minimum area under the receiver operating characteristic curve(AUROC)for the following 7 days was 0.786(95%CI 0.721-0.851),while the AUROC on the next day was 0.872(0.831-0.913).In the recovery prediction model,the minimum AUROC for the following 3 days was 0.675(0.583-0.767),while the AUROC on the next day was 0.823(0.770-0.876).The top 5 features for deterioration prediction on the 7th day were disease course,length of hospital stay,hypertension,and diastolic blood pressure.Those for recovery prediction on the 3rd day were age,D-dimer levels,disease course,creatinine levels and corticosteroid therapy.Conclusion:The models could accurately predict the dynamics of Omicron patients’conditions using daily multidimensional variables,revealing important features including comorbidities(e.g.,hyperlipidemia),age,disease course,vital signs,D-dimer levels,corticosteroid therapy and oxygen therapy. | Yujie Chen Yao Wang Jieqing Chen Xudong Ma Longxiang Su Yuna Wei Linfeng Li Dandan Ma Feng Zhang Wen Zhu Xiaoyang Meng Guoqiang Sun Lian Ma Huizhen Jiang Chang Yin Taisheng Li Xiang Zhou China National Critical Care Quality Control Center Group | 2023 | Infectious Disease Modelling2023，8，4： | 0 |
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