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1Towards 6G wireless communication networks:vision,enabling technologies,and new paradigm shifts显示文摘The fifth generation(5G)wireless communication networks are being deployed worldwide from 2020 and more capabilities are in the process of being standardized,such as mass connectivity,ultra-reliability,and guaranteed low latency.However,5G will not meet all requirements of the future in 2030 and beyond,and sixth generation(6G)wireless communication networks are expected to provide global coverage,enhanced spectral/energy/cost efficiency,better intelligence level and security,etc.To meet these requirements,6G networks will rely on new enabling technologies,i.e.,air interface and transmission technologies and novel network architecture,such as waveform design,multiple access,channel coding schemes,multi-antenna technologies,network slicing,cell-free architecture,and cloud/fog/edge computing.Our vision on 6G is that it will have four new paradigm shifts.First,to satisfy the requirement of global coverage,6G will not be limited to terrestrial communication networks,which will need to be complemented with non-terrestrial networks such as satellite and unmanned aerial vehicle(UAV)communication networks,thus achieving a space-airground-sea integrated communication network.Second,all spectra will be fully explored to further increase data rates and connection density,including the sub-6GHz,millimeter wave(mmWave),terahertz(THz),and optical frequency bands.Third,facing the big datasets generated by the use of extremely heterogeneous networks,diverse communication scenarios,large numbers of antennas,wide bandwidths,and new service requirements,6G networks will enable a new range of smart applications with the aid of artificial intelligence(AI)and big data technologies.Fourth,network security will have to be strengthened when developing 6G networks.This article provides a comprehensive survey of recent advances and future trends in these four aspects.Clearly,6G with additional technical requirements beyond those of 5G will enable faster and further communications to the extent that the boundary between physical and cyber worlds disappears.Xiaohu YOU Cheng-Xiang WANG Jie HUANG Xiqi GAO Zaichen ZHANG Mao WANG Yongming HUANG Chuan ZHANG Yanxiang JIANG Jiaheng WANG Min ZHU Bin SHENG Dongming WANG Zhiwen PAN Pengcheng ZHU Yang YANG Zening LIU Ping ZHANG Xiaofeng TAO Shaoqian LI Zhi CHEN Xinying MA Chih-Lin I Shuangfeng HAN Ke LI Chengkang PAN Zhimin ZHENG Lajos HANZO Xuemin(Sherman)SHEN Yingjie Jay GUO Zhiguo DING Harald HAAS Wen TONG Peiying ZHU Ganghua YANG Jun WANG Erik GLARSSON Hien Quoc NGO Wei HONG Haiming WANG Debin HOU Jixin CHEN Zhe CHEN Zhangcheng HAO Geoffrey Ye LI Rahim TAFAZOLLI Yue GAO HVincent POOR Gerhard P.FETTWEIS Ying-Chang LIANG 2021Science China(Information Sciences)2021,64,1:122
2Determination and dynamics of difenoconazole residues in Chinese cabbage and soil显示文摘一个分析方法用稳固的阶段抽取(SPE ) 被开发为在中国卷心菜和土壤检测 difenoconazole 的残余的清除和煤气的层析。恢复和在中国卷心菜的这个方法的相对标准差是 87.6 鈥 ?9.0% , 1.71 鈥 ?0.50% 分别地;在土壤是 92.4 鈥 ?5.5% , 4.93 鈥 ?0.70% 分别地。在中国卷心菜和土壤的 difenoconazole 残余的进一步的降级被学习评估残余行为和 difenoconazole 的环境安全。在中国卷心菜和土壤的 difenoconazole 的降级率与 6.6 鈥 ?.8 和 54.2 鈥 ? 的一半生活跟随了第一顺序动力学 5.0 天分别地。Zhi Hua Wang Tong Yang Dong Mei Qin Yong Gong Ying Ji 2008Chinese Chemical Letters2008,19,8:26
3RNA-Seq analysis of yak ovary: improving yak gene structure information and mining reproduction-related genes显示文摘RNA-Seq,a high-throughput(HT)sequencing technique,has been used effectively in large-scale transcriptomic studies,and is particularly useful for improving gene structure information and mining of new genes.In this study,RNA-Seq HT technology was employed to analyze the transcriptome of yak ovary.After Illumina-Solexa deep sequencing,26826516 clean reads with a total of 4828772880 bp were obtained from the ovary library.Alignment analysis showed that 16992 yak genes mapped to the yak genome and 3734 of these genes were involved in alternative splicing.Gene structure refinement analysis showed that7340 genes that were annotated in the yak genome could be extended at the 5′or 3′ends based on the alignments been the transcripts and the genome sequence.Novel transcript prediction analysis identified 6321 new transcripts with lengths ranging from 180 to 14884 bp,and 2267 of them were predicted to code proteins.BLAST analysis of the new transcripts showed that1200?4933 mapped to the non-redundant(nr),nucleotide(nt)and/or SwissProt sequence databases.Comparative statistical analysis of the new mapped transcripts showed that the majority of them were similar to genes in Bos taurus(41.4%),Bos grunniens mutus(33.0%),Ovis aries(6.3%),Homo sapiens(2.8%),Mus musculus(1.6%)and other species.Functional analysis showed that these expressed genes were involved in various Gene Ontology(GO)categories and Kyoto Encyclopedia of Genes and Genomes pathways.GO analysis of the new transcripts found that the largest proportion of them was associated with reproduction.The results of this study will provide a basis for describing the normal transcriptome map of yak ovary and for future studies on yak breeding performance.Moreover,the results confirmed that RNA-Seq HT technology is highly advantageous in improving gene structure information and mining of new genes,as well as in providing valuable data to expand the yak genome information.LAN DaoLiang XIONG XianRong WEI YanLi XU Tong ZHONG JinCheng ZHI XiangDong WANG Yong LI Jian 2014Science China(Life Sciences)2014,57,9:23
4Effect of intestinal ischemia-reperfusion on expressions of endogenous basic fibroblast growth factor and transforming growth factor β in lung and its relation with lung repair显示文摘AIM To study the changes of endogenoustransforming growth factor β(TGFβ)and basicfibroblast growth factor(bFGF)in lung followingintestinal ischemia and reperfusion injury andtheir effects on lung injury and repair.METHODS Sixty Wistar rats were divided intofive groups,which underwent sham-operation,ischemia(45 minutes),and reperfusion(6,24and 48 hours,respectively)after ischemia(45minutes).Immunohistochemical method wasused to observe the localization and amounts ofboth growth factors.RESULTS Positive signals of both growthfactors could be found in normal lung,mainly inalveolar cells and endothelial cells of vein.Afterischemia and reperfusion insult,expressions ofboth growth factors were increased and theiramounts at 6 hours were larger than those ofnormal control or of 24 and 48 hours after insult.CONCLUSION The endogenous bFGF and TGF βexpression appears to be up-regulated in thelung following intestinal ischemia andreperfusion,suggesting that both growth factorsmay be involved in the process of lung injury andrepair.Xiao Bing Fu Yin Hui Yang Tong Zhu Sun Xiao Man Gu Li Xian Jiang Xiao Oing Sun Zhi Yong Sheng Research Laboratory,304th Hospital of PLA,Beijing 100037,China 2000World Journal of Gastroenterology2000,6,3:21
5EXPERIMENTAL STUDY OF FLOWFIELD STRUCTURE AROUND AN OGIVE-CYLINDER显示文摘The flowfield structure and their aerodynamic characteristics over an ogive cylinder were studied by means of flow visualization and surface pressure measurement in a water tunnel and a wind tunnel. The existence of multi asymmetric vortices over long slender bodies was experimentally confirmed at large angles of attack and in the subcritical Reynolds number range. The spatial 3 D characteristics of the multi vortices system were analyzed and a physical model was developed. The topological structure of different patterns in cross flow plane was studied and the mechanism governing the formation of asymmetric vortices and multi vortices was discussed from the viewpoint of stability of the topological structure. It was concluded that the maximum in the sectional side force distribution curve are not caused by the shedding of higher position vortex, but by the cross over to the symmetric plane of the lower position vortex.Ph.D.Candidate:Wang Gang Fluid Mechanics Institute, Beijing University of Aeronautics and Astronautics, Beijing 100083, China,Supervisor: Deng Xue ying (Beijing University of Aeronautics and Astronautics) Members of Dissertation Defense Committee: Tong Bing gang (Graduate School of the Chinese Academy of Sciences),Chairman Gu Zhi fu (Peking University) Yang Qi de (China Aerodynamics Research and Development Center) Lv Zhi yong (Beijing University of Aeronautics and Astronautics) Liu Pei qing (Beijing University of Aeronautics and Astronautics) 2003Journal of Hydrodynamics2003,15,5:18
6Methylation of Dickkopf-3 as a prognostic factor in cirrhosis-related hepatocellular carcinoma显示文摘AIM:To investigate the prevalence and time of Dickkopf(DKK) family methylation and its clinical significance in hepatocarcinogenesis. METHODS:Methylation of DKK family genes was quantitatively analyzed in 115 liver tissue samples,including 50 pairs of primary hepatocellular carcinoma(HCC) and matched noncancerous cirrhotic tissue samples,as well as 15 liver cirrhosis biopsy samples. RESULTS:The methylation level of DKK3 was significantly higher in HCC tissue samples than in matched noncancerous cirrhotic tissue samples(P<0.0001) orin liver cirrhosis biopsy samples(P=0.0139) .Receiver operator characteristic curve analysis confirmed that the percent of methylated reference(PMR) values of DKK3 could effectively discriminate HCC tissue samples from noncancerous tissue samples(AUC=0.8146) or liver cirrhosis biopsy samples(AUC=0.7093) .Kaplan-Meier survival curves revealed that the progression-free survival time of patients with a higher DKK3 methylation level(PMR >1%) was significantly shorter than that of those with a lower DKK3 methylation level(PMR≤1%)(P=0.0255) . Multivariate Cox analysis indicated that methylated DKK3 was significantly and independently related with a shorter survival time(relative risk=2.527,95%CI:1.063-6.008,P=0.036) of HCC patients. CONCLUSION:Methylation of DKK3 is an important event in early malignant transformation and HCC progression,and therefore might be a prognostic indicator for risk assessment of HCC.Yang, Bin Du, Zhi Gao, Ying-Tang Lou, Cheng Zhang, Shi-Guang Bai, Tong Wang, Yi-Jun Song, Wen-Qin 2010World Journal of Gastroenterology2010,16,6:16
7Relationship between Fas/ FasL expression and apoptosis of colon adenocarcinoma cell lines显示文摘INTRODUCTIONFas/ FasL system has been identified as a keymediator of apoptosis in tumor cells[1-4]. Theoccurrence and development of neoplasm are closelyrelated to apoptosis[5-7] Most chemotherapeuticdrugs kill cancer cells mainly by inducingapoptosis[8-14].'Zhi Hai Peng Tong Hai Xing Guo Qiang Qiu Hua Mei Tang Shanghai No. 1 People’s Hospital, Shanghai 200080, China 2001World Journal of Gastroenterology2001,7,1:15
8Multicenter Evaluation of the Molecular Line Probe Assay for Multidrug Resistant Mycobacterium Tuberculosis Detection in China显示文摘In order to evaluate the performance of a molecular Hain line probe assay(Hain LPA)for rapid detection of rifampicin and isoniazid resistance of Mycobacterium tuberculosis in China。LI Qiang DONG Hai Yan PANG Yu XIA Hui OU Xi Chao ZHANG Zhi Ying LI Jun Chen ZHANG Jian Kang HUAN Shi Tong CHIN Daniel P KAM Kai Man ZHAO Yan Lin 2015Biomedical and Environmental Sciences2015,28,6:13
9Influence of high energy ball milling on Al-30Si powder and ceramic particulate显示文摘The influence of high energy ball milling on Al 30Si powder and ceramic particulate SiC was studied by means of SEM, XRD and DSC. The results show that Al 30Si powder and their microstructure are obviously refined after high energy ball milling process. The alloy powder and SiC p stick closely to each other without interfacial reaction. DSC results detect no reaction but relaxation of the samples. So high energy ball milling can be used as an effective method for ceramic particulate pre treatment in the fabrication of MMC.LI Yuan yuan(李元元) ZHANG Da tong(张大童) XIAO Zhi yu(肖志宇) 2000中国有色金属学会会刊:英文版2000,10,3:12
10Insight-HXMT observations of the first binary neutron star merger GW170817显示文摘Finding the electromagnetic(EM) counterpart of binary compact star merger, especially the binary neutron star(BNS) merger,is critically important for gravitational wave(GW) astronomy, cosmology and fundamental physics. On Aug. 17, 2017,Advanced LIGO and Fermi/GBM independently triggered the first BNS merger, GW170817, and its high energy EM counterpart,GRB 170817 A, respectively, resulting in a global observation campaign covering gamma-ray, X-ray, UV, optical, IR, radio as well as neutrinos. The High Energy X-ray telescope(HE) onboard Insight-HXMT(Hard X-ray Modulation Telescope) is the unique high-energy gamma-ray telescope that monitored the entire GW localization area and especially the optical counterpart(SSS17 a/AT2017 gfo) with very large collection area(~1000 cm^2) and microsecond time resolution in 0.2-5 MeV. In addition,Insight-HXMT quickly implemented a Target of Opportunity(ToO) observation to scan the GW localization area for potential X-ray emission from the GW source. Although Insight-HXMT did not detect any significant high energy(0.2-5 MeV) radiation from GW170817, its observation helped to confirm the unexpected weak and soft nature of GRB 170817 A. Meanwhile,Insight-HXMT/HE provides one of the most stringent constraints(~10^(-7) to 10^(-6) erg/cm^2/s) for both GRB170817 A and any other possible precursor or extended emissions in 0.2-5 MeV, which help us to better understand the properties of EM radiation from this BNS merger. Therefore the observation of Insight-HXMT constitutes an important chapter in the full context of multi-wavelength and multi-messenger observation of this historical GW event.TiPei Li ShaoLin Xiong ShuangNan Zhang FangJun Lu LiMing Song XueLei Cao Zhi Chang Gang Chen Li Chen TianXiang Chen Yong Chen YiBao Chen YuPeng Chen Wei Cui WeiWei Cui JingKang Deng YongWei Dong YuanYuan Du MinXue Fu GuanHua Gao He Gao Min Gao MingYu Ge YuDong Gu Ju Guan ChengCheng Guo DaWei Han Wei Hu Yue Huang Jia Huo ShuMei Jia LuHua Jiang WeiChun Jiang Jing Jin YongJie Jin Bing Li ChengKui Li Gang Li MaoShun Li Wei Li Xian Li XiaoBo Li XuFang Li YanGuo Li ZiJian Li ZhengWei Li XiaoHua Liang JinYuan Liao CongZhan Liu GuoQing Liu HongWei Liu ShaoZhen Liu XiaoJing Liu Yuan Liu YiNong Liu Bo Lu XueFeng Lu Tao Luo Xiang Ma Bin Meng Yi Nang JianYin Nie Ge OU JinLu Qu Na Sai Liang Sun Yin Tan Lian Tao WenHui Tao YouLi Tuo GuoFeng Wang HuanYu Wang Juan Wang WenShuai Wang YuSa Wang XiangYang Wen BoBing WU Mei Wu GuangCheng Xiao He Xu YuPeng Xu LinLi Yan JiaWei Yang Sheng Yang YanJi Yang AiMei Zhang ChunLei Zhang ChengMo Zhang Fan Zhang HongMei Zhang Juan Zhang Qiang Zhang Shu Zhang Tong Zhang Wei Zhang WanChang Zhang WenZhao Zhang Yi Zhang Yue Zhang YiFei Zhang YongJie Zhang Zhao Zhang ZiLiang Zhang HaiSheng Zhao JianLing Zhao XiaoFan Zhao ShiJie Zheng Yue Zhu YuXuan Zhu ChangLin Zou 2018Science China(Physics,Mechanics & Astronomy)2018,61,3:12
11The effect of hematoma puncture drainage before decompressive craniectomy on the prognosis of hypertensive intracerebral hemorrhage with cerebral hernia at a high altitude显示文摘Purpose:Rapid decompressive craniectomy(DC)was the most effective method for the treatment of hypertensive intracerebral hemorrhage(HICH)with cerebral hernia,but the mortality and disability rate is still high.We suspected that hematoma puncture drainage(PD)+DC may improve the therapeutic effect and thus compared the combined surgery with DC alone.Methods:From December 2013 to July 2019,patients with HICH from Linzhi,Tibet and Honghe,Yunnan Province were retrospectively analyzed.The selection criteria were as follows:(1)altitude≥1500 m;(2)HICH patients with cerebral hernia;(3)Glascow coma scale score of 4-8 and time from onset to admission≤3 h;(4)good liver and kidney function;and(5)complete case data.The included patients were divided into DC group and PD+DC group.The patients were followed up for 6 months.The outcome was assessed by Glasgow outcome scale(GOS)score,Kaplan-Meier survival curve and correlation between time from admission to operation and prognosis.A good outcome was defined as independent(GOS score,4-5)and poor outcome defined as dependent(GOS score,3-1).All data analyses were performed using SPSS 19,and comparison between two groups was conducted using separatet-tests or Chi-square tests.Results:A total of 65 patients was included.The age ranged 34-90 years(mean,63.00±14.04 years).Among them,31 patients had the operation of PD+DC,whereas 34 patients underwent DC.The two groups had no significant difference in the basic characteristics.After 6 months of follow-up,in the PD+DC group there were 8 death,4 vegetative state,4 severe disability(GOS score 1-3,poor outcome 51.6%);8 moderate disability,and 7 good recovery(GOS score 4-5,good outcome 48.4%);while in the DC group the result was 15 death,6 vegetative state,5 severe disability(poor outcome 76.5%),4 moderate disability and 4 good recovery(good outcome 23.5%).The GOS score and good outcome were significantly less in DC group than in PD+DC group(Z=-1.993,p=0.046;χ2=4.38,p=0.043).However,there was no significant difference regarding the survival curve between PD+DC group and DC group.The correlation between the time from admission to operation and GOS at 6 months(r=-0.41,R2=0.002,p=0.829)was not significant in the PD+DC group,but significant in the DC group(r=-0.357,R2=0.128,p=0.038).Conclusion:PD+DC treatment can improve the good outcomes better than DC treatment for HICH with cerebral hernia at a high altitude.Lin-Jie Wei Chi Lin Xing-Sen Xue Guo-Dong Dun Jian-Bo Zhang Yan-Xiang Tong Jia-Xiong Wang Shi-Ji Yang Ling Wang Zhi Chen Hua Feng Gang Zhu 2021Chinese Journal of Traumatology2021,24,6:11
12Correlation of Seven Biological Factors(Hsp90α,p53,MDM2,Bcl-2,Bax,Cytochrome C,and Cleaved caspase3)with Clinical Outcomes of ALK+ Anaplastic Large-cell Lymphoma显示文摘Objective To explore correlation of seven apoptosis‐related proteins (Hsp90α,p53,MDM2,Bcl‐2,Bax,Cytochrome C,and Cleaved caspase3) with clinical outcomes of ALK+ anaplastic large‐cell lymphoma (ALCL).Methods Using immunohistochemistry and immunofluorescence double staining methods,the expressions of these seven apoptosis‐associated proteins were studied to clarify their relationship with clinical outcomes of 36 ALK+ and 25 ALK‐ systemic ALCL patients enrolled between 1996 and 2006.The relationship of these apoptosis‐regulating proteins with NPM‐ALK status was also evaluated with the tyrosine inhibitor herbimycin A (HA) in vitro by immunocytochemistry,Western blotting and flow cytometric assays.Results The presence of Hsp90α‐,MDM2‐,Bax‐,Cytochrome C,and Cleaved caspase3‐positive tumor cells was found significantly different in ALK+ and ALK‐ ALCLs ,which was correlated with highly favorable clinical outcome.The Bcl‐2‐ and p53‐positive tumor cells were found in groups of patients with unfavorable prognosis.Inhibition of NPM‐ALK by HA could reactivate the p53 protein and subsequent apoptosis‐related proteins and therefore induced apoptosis in ALK+ ALCL cells.Conclusion Our results suggest that these seven proteins might be involved in apoptosis regulation and associated with clinical outcome of ALK+ systemic ALCLs.We also reveal a dynamic chain relation that NPM‐ALK regulates p53 expression and subsequent apoptosis cascade in ALK+ ALCLs.LI Hui Ling HUANG Xue Ping ZHOU Xin Hua JI Tian Hai WU Zi Qing WANG Zhi Qiang JIANG Hui Yong LIU Fan Rong ZHAO Tong 2011Biomedical and Environmental Sciences2011,24,6:9
13Solidification Behavior and Segregation of Re-containing Cast Ni-base Superalloy with Different Cr Content显示文摘The effect of chromium(Cr) on solidification and segregation behavior of Re-containing cast Ni-base superalloys was investigated by optical microscopy(OM),scanning electron microscopy(SEM) and electronic probe micro analysis(EPMA).The results show that Cr has significant effect on solidification and segregation behavior of Re-containing cast Ni-base superalloys.The liquidus and solidus of alloy decrease with increasing Cr in alloys.The segregation coefficient(K) of Mo increases and that of W and Re decreases gradually with increasing Cr element.Xiurong Guan Enze Liu Zhi Zheng Yongsi Yu Jian Tong Yuchun Zhai 2011Journal of Materials Science & Technology2011,27,2:9
14Two new phenylethanoid glycosides and a new secoiridoid glycoside from the roots of Picrorhiza scrophulariiflora显示文摘二新 phenylethanoid glycosides,命名 scroside H (1 ) , scroside 我(2 ) ,并且新 secoiridoid glycoside,命名 picrogentioside 我(3 ) ,从地下被孤立 Picrorhiza scrophulariiflora 的部分。他们的结构根据分光镜的证据被阐明。Lian Chun Zou Zhi Hui Yan Tong Fei Zhu Hua Xiang Da Cheng Wang Xu Ming Deng 2010Chinese Chemical Letters2010,21,9:7
15Increased circulating circular RNA103516 is a novel biomarker for inflammatory bowel disease in adult patients显示文摘BACKGROUND Increasing evidence demonstrates that by acting as microRNA sponges modulating gene expression at the transcriptional or post-transcriptional level,circular RNAs(circRNAs)participate in the pathogenesis of a variety of diseases and are considered ideal biomarkers of human disease.AIM To examine the expression of circRNA_103516 in inflammatory bowel disease(IBD)and its associations with clinical phenotypes and inflammatory cytokines.METHODS Peripheral blood mononuclear cells(PBMCs)were obtained from patients with IBD,healthy controls(HCs),and patient controls(PCs).Expression of circRNA_103516 and hsa-miR-19b-1-5p was assessed by quantitative reverse transcription-polymerase chain reaction.Crohn's disease activity index(CDAI),Mayo score,C-reactive protein(CRP)level,and erythrocyte sedimentation rate(ESR)were measured.To assess the inflammatory cytokines tumour necrosis factorα(TNF-α),interferon-γ(IFN-γ),and interleukin-10(IL-10),blood samples were analysed by flow cytometry.RESULTS Ninety Crohn’s disease(CD)and 90 ulcerative colitis(UC)patients,80 HCs,and 35 PCs were included in the study.CircRNA_103516 was upregulated in CD and UC patients compared with HCs and PCs(P<0.05).The area under the curve of circRNA_103516 for diagnosing CD and UC was 0.790 and 0.687,respectively.In addition,circRNA_103516 levels were increased in active CD and UC compared with remittent groups(P=0.027,P=0.045).Furthermore,in CD,circRNA_103516 correlated positively with CDAI(P<0.001),CRP(P<0.001),ESR(P<0.001),TNFα(P<0.001),and IFN-γ(P<0.001)and negatively correlated with IL-10(P=0.006).In UC patients,circRNA_103516 correlated with Mayo score(P<0.001),CRP(P<0.001),ESR(P<0.001),TNFα(P<0.001),IFN-γ(P=0.011),and IL-10(P=0.002).Additionally,circRNA_103516 correlated positively with stricturing(P=0.018)and penetrating(P=0.031)behaviour.Moreover,hsamiR-19b-1-5p correlated negatively with circRNA_103516 in CD.CONCLUSION CircRNA_103516 levels in PBMCs can be considered an ideal candidate biomarker for diagnosing IBD.Dysregulation of circRNA_103516 may participate in the molecular mechanism of IBD through hsa-miR-19b-1-5p sponging.Yu-Lan Ye Juan Yin Tong Hu Li-Ping Zhang Long-Yun Wu Zhi Pang 2019World Journal of Gastroenterology2019,25,41:6
16Lateral stability region conservativeness estimation and torque distribution for FWIA electric vehicle steering显示文摘Estimation of the lateral stability region and torque distribution on steering is very important to improve stability in lateral handling for all wheel drive electric vehicles.Based on the built-nonlinear vehicle dynamic model,the lateral stability region of the vehicle related to steering is estimated using Lyapunov function.We obtained stable equilibrium points of non-straight driving according to the estimated lateral stability region and also reconstructed the Lyapunov function matrix,which proved that the closed-loop system composed of yaw rate and lateral velocity is satisfied with negative definite property.In addition,the designed controller dynamically allocates the drive torque in terms of the vertical load and slip rate of the four wheels.The simulation results show that the estimated lateral stability region and the designed controller are satisfactory in handling stability performance against different roads and vehicle parameters.YIN Guo Dong JIN Xian Jian QING Zhi Yong BIAN Chen Tong 2015Science China(Technological Sciences)2015,58,4:5
17Performance and mechanism study for low-temperature SCR of NO with propylene in excess oxygen over Pt/TiO_2 catalyst显示文摘A 0.5 wt.% Pt/TiO2 catalyst was prepared and used for the low-temperature selective catalytic reduction(SCR) of NO with C3 H6 in the presence of excess oxygen.The effects of Pt loading and O2 concentration on Pt/TiO2 catalytic performance for low-temperature SCR were investigated.It was found that optimal Pt loading was 0.5 wt.% and excess O2 favored low-temperature SCR of NOx.The mechanism of low-temperature SCR of NO with C3 H6 was investigated with respect to the behavior of adsorbed species over Pt/TiO2 at 150°C using in situ DRIFTS.The results indicated that surface nitrosyl species(Pt δ+-NO and Ti 3+-NO) and Pt 2+-CO are main reaction intermediates during the interactions of NO,C3 H6 and O2.A simplified NO decomposition mechanism for the low-temperature SCR of NO with C3 H6 was proposed.Zhixiang Zhang,Mingxia Chen,Zhi Jiang,Wenfeng Shangguan Research Center for Combustion and Environmental Technology,Shanghai Jiao Tong University,Shanghai 200240,China. 2010Journal of Environmental Sciences2010,22,9:5
18Polymorphisms of dihydropyrimidine dehydrogenase gene and clinical outcomes of gastric cancer patients treated with fluorouracil-based adjuvant chemotherapy in Chinese population显示文摘背景 Dihydropyrimidine 脱氢酶( DPD ),涉及5氟尿嘧啶( 5-FU )的分解代谢的关键酶,是关于这研究的 .The 目的是探索在 dihydropyrimidine 脱氢酶基因( DPYD )和在中国 population.Methods 与基于氟尿嘧啶的辅助化疗对待的胃的癌症病人的临床的结果的多型性之间的协会的 5-FU 的功效和毒性的 pharmacogenetic 研究的吸引人的候选人有气体的 362ZHANG Xiao-ping BAI Zhi-bin CHEN Bao-an FENG Ji-feng YAN Feng JIANG Zhi ZHONG Yue-jiao WU Jian-zhong CHEN Lu LU Zu-hong TONG Na ZHANG Zheng-dong XU-Pei-pei PENG Miao-xin ZHANG Wen-jing WANG Shuai 2012Chinese Medical Journal2012,,5:5
19Aberrant methylation of SPARC in human hepatocellular carcinoma and its clinical implication显示文摘AIM:To investigate the methylation status of secreted protein acidic and rich in cysteine(SPARC) in human hepatocellular carcinoma(HCC) and evaluate its clinical implication.METHODS:The methylation status of SPARC was analyzed in one HCC cell line(SMMC-7721) and 60 pairs of HCC and corresponding nontumorous tissues by methylation-specific polymerase chain reaction and bisulfite sequencing.The expression of SPARC mRNA and protein were examined by reverse transcription polymerase chain reaction and immunohistochemistry,respectively.The correlations between the methylation status and the gene expression,the clinicopathological parameters,as well as the prognosis after surgery were analyzed.RESULTS:In the SMMC-7721 cell line,the loss of SPARC expression was correlated with the aberrant methylation and could be reactivated by the demethylating agent 5-aza-2'-deoxycytidine.Methylation frequency of SPARC in HCC was significantly higher than that in the corresponding nontumorous tissues(45/60 vs 7/60,P < 0.001),and it was correlated with the pathological classification(P = 0.019).The downregulation of the SPARC mRNA expression in HCC was correlated with the SPARC methylation(P = 0.040).The patients with methylated SPARC had a poorer overall survival than those without methylated SPARC(28.0 mo vs 41.0 mo,P = 0.043).CONCLUSION:Aberrant methylation is an important mechanism for SPARC inactivation in HCC and SPARC methylation may be a promising biomarker for the diagnosis and prognosis of HCC.Ye Zhang Zhi Du Tong Bai Ying-Tang Gao Yi-Jun Wang Cheng Lou Feng-Mei Wang Yu Bai Bin Yang 2012World Journal of Gastroenterology2012,18,17:4
20Ischemia-modified albumin measured with ultra-filtration assay in early diagnosis of acute coronary syndrome显示文摘Shu-ming Pan Chao-yang Tong Qing Lin Chen-ling Yao Jie Zhao Zhi Deng 2010World Journal of Emergency Medicine2010,1,1:4
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