|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Surgical intervention for advanced valvular heart disease in 227 cases显示文摘Background Although the results of surgical treatment in cardiac valve disease continue to improve, the postoperative mortality rate and the rate of complications in patients with advanced valvular heart disease (AVHD) are still very high. We did this retrospective study to summarize the surgical experience of heart valve replacement for patients with AVHD and discuss effective ways to improve the surgical outcome.Methods From January 1994 to October 2003, surgical procedures of heart valve replacement were performed on 227 (136 men and 91 women) patients with AVHD in our Department of Cardiothoracic Surgery. The clinical data of all patients were collected and analysed. Patients’ age ranged from 10 years to 77 years. In preoperative cardiac function grading, 157 cases were NYHA III and 70 cases NYHA IV. Fifty-one patients had had cardiac operations. The ultrasonic cardiac graphs showed that 145 patients suffered from moderate or severe pulmonary hypertension and 73 had combined giant left ventricle. Mitral valve replacement was performed in 32 cases, aortic valve replacement in 90, tricuspid valve replacement in 1, combined mitral and aortic replacement in 103 and combined mitral and tricuspid replacement in 1. Nineteen patients also received surgical corrections for other minor abnormalities during the operations. A logistic model was established to evaluate the influence of perioperative factors on the mortality rate. Results The operative mortality rate was 13.2% (30/227). The main causes of death included multiple organ dysfunction syndrome (MODS), low cardiac output syndrome and ventricular fibrillation. From the results of the binary noncounterpart multivariate logistic regression, the following statistically significant factors were found to influence the operative mortality rate: redo operation, age ≥55 years, preoperative NYHA cardiac function grading, extracorporeal circulation time ≥120 minutes and postoperative usage of GIK (glucose, insulin and potassium) solution. All factors were risk ones except postoperative application of GIK. The Hosmer-Lemeshow goodness of fit coefficient of this model was 0.976. Conclusions The risk factors associated with postoperative mortality rate in the patients with AVHD were redo operation, age ≥55 years, preoperative NYHA cardiac function grading and extracorporeal circulation time ≥120 minutes. Postoperative usage of GIK acted as a kind of metabolic therapy and will improve the recovery for patients with AVHD. Active perioperative management and care will play a very important role in reducing the operative risk and improving the short term outcome of surgical treatment for the patients with AVHD. | ZHANGXi XUZhe XUYing-qi WANGZhi-ping WUZhong-kai TANGBai-yun XIONGMai YAOJian-ping SUNPei-wu ZHONGFo-tian | 2005 | Chinese Medical Journal2005，，12： | 11 |
| 2 | Harnessing Internet finance with innovative cyber credit management显示文摘In the last two decades,Internet technologies,such as cloud computing,mobile communications,social media,and big data analytics,have brought tremendous changes to our society and reshaped the business in various industries.Specifically,the mushrooming innovations in the financial area fertilized by information and communication technologies indicates the advent of the Internet finance era.Applying the exploratory research approach,we investigate major innovative Internet-based financial services and classify them into five categories,as of e-commerce,e-payment,e-money market,online loan services,and digital currencies.Then we propose a market structure of Internet finance extended from the traditional financial market.We claim that credit management is the key issue in the marketplace of Internet finance,characterized by big data analytics,in which cyber credit appears as whole-process,multi-dimensional,and holographic.We further suggest that cyber credit be represented in the form of vector to overcome the limits of traditional single-value measure in cyber credit management.Based on this framework,we raise main research issues in Internet finance from the perspectives of theory,technology,and governance. | Zhangxi Lin Andrew B.Whinston Shaokun Fan | 2015 | Financial Innovation2015，1，1： | 7 |
| 3 | Gravitational wave astrophysics, data analysis and multimessenger astronomy显示文摘This paper reviews gravitational wave sources and their detection. One of the most exciting potential sources of gravitational waves are coalescing binary black hole systems. They can occur on all mass scales and be formed in numerous ways, many of which are not understood. They are generally invisible in electromagnetic waves, and they provide opportunities for deep investigation of Einstein's general theory of relativity. Sect. 1 of this paper considers ways that binary black holes can be created in the universe, and includes the prediction that binary black hole coalescence events are likely to be the first gravitational wave sources to be detected. The next parts of this paper address the detection of chirp waveforms from coalescence events in noisy data.Such analysis is computationally intensive. Sect. 2 reviews a new and powerful method of signal detection based on the GPUimplemented summed parallel infinite impulse response filters. Such filters are intrinsically real time alorithms, that can be used to rapidly detect and localise signals. Sect. 3 of the paper reviews the use of GPU processors for rapid searching for gravitational wave bursts that can arise from black hole births and coalescences. In sect. 4 the use of GPU processors to enable fast efficient statistical significance testing of gravitational wave event candidates is reviewed. Sect. 5 of this paper addresses the method of multimessenger astronomy where the discovery of electromagnetic counterparts of gravitational wave events can be used to identify sources, understand their nature and obtain much greater science outcomes from each identified event. | LEE Hyung Mok LE BIGOT Eric-Olivier DU ZhiHui LIN ZhangXi GUO XiangYu WEN LinQing PHUKON Khun Sang PANDEY Vihan BOSE Sukanta FAN Xi-Long HENDRY Martin | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，12： | 5 |
| 4 | The morphological and phylogenetic characterization for the dinoflagellate Margalefidinium fulvescens (=Cochlodinium fulvescens) isolated from the Jiaozhou Bay, China显示文摘The dinoflagellate genus Margalefidinium has been split from Cochlodinium as a new genus recently and Margalefidinium fulvescens is one of the five Margalefidinium species. Margalefidinium fulvescens is toxic and has been reported from the coastal waters of USA, Canada, Mexico, China, Japan, Indonesia, Korea, Pakistan and Spain. Here we provide the morphological and phylogenetic characterization for an isolate of it from the Jiaozhou Bay, Qingdao, China. Our results showed that the vegetative cells were subspherical to ellipsoidal, 34–60 μm in length, and 19–41 μm in width. Both single cell forms and colonies in chains of 2, 4, or 8 cells were observed in cultures, but chain forms with 2 or 4 cells were observed more often in the field samples. The cingulum was rather deep, encircling the cell approximately twice, but the sulcus was rather narrow, surrounding the cell about one turn. The nucleus was spherical and located at the central epicone. The chloroplasts were granular, brownish, and scattered peripherally. An orange pigmented body also appeared in the epicone. The apical groove appeared vase-like as previously described. Under epi-fluorescence microscopy, a pumpkin-like structure was clearly observed, in which cells were embedded. Cells were observed to exit from the structure, which led us to a hypothesis that the structure may provide cells a shelter to avoid predation or to respond to other stresses. The phylogenetic analyses based on partial LSU rDNA sequences indicated that M. fulvescens from the Jiaozhou Bay was grouped with M. fulvescens populations from other origins and closely related to the clade of M. polykrikoides.Our morphological observations and phylogenetic analyses together confirmed the presence of M. fulvescens in China and our monitoring has also observed the species dominant in the dinoflagellate community of the Jiaozhou Bay in the early autumn of 2015, which alerted us to continually monitor this bloom-forming species in the region. | HU Zhangxi DENG Yunyan LI Yuhang TANG Ying Zhong | 2018 | Acta Oceanologica Sinica2018，37，10： | 5 |
| 5 | A trust model for online peer-to-peer lending: a lender’s perspective显示文摘 | Dongyu Chen Fujun Lai Zhangxi Lin | 2014 | Information Technology and Management2014，，4： | 2 |
| 6 | Validation of reference genes for gene expression studies in the dinoflagellate Akashiwo sanguinea by quantitative real-time RT-PCR显示文摘The accurate measurement of gene expression via quantitative real-time reverse transcription PCR(q RT-PCR)heavily relies on the choice of valid reference gene(s) for data normalization. Resting cyst is the dormant stage in the life cycle of dinoflagellate, which plays crucial roles in HAB-forming dinoflagellate ecology. However, only limited investigations have been conducted on the reference gene selection in dinoflagellates. Gap remained in our knowledge about appropriate HKGs for normalizing gene expression in different life stages, which laid obstacles for the application of q RT-PCR to the HAB-forming group. In this study, six candidate reference genes,18 S ribosomal RNA(18S), glyceraldehyde-3-phosphate dehydrogenase(GAPDH), α-tubulin(TUA), β-tubulin(TUB), actin(ACT) and cytochrome oxidase subunit 1(COX1), were evaluated for their expression stability with q RT-PCR and three statistical algorithms(Ge Norm, Norm Finder, and Best Keeper) for the cosmopolitan, harmful algal bloom-forming dinoflagellate Akashiwo sanguinea. Expression patterns were observed across 18 biological samples, including cells at resting stages(resting cysts), different growth stages, in darkness, exposed to abscisic acid(ABA) and exposed to temperature stress. The results indicated that TUA, 18 S and GAPDH were relatively stable across all tested scenarios. While the best-recommended reference genes differed across experimental groups, the pairs of ACT and TUA, 18 S and GAPDH were the most reliable for cells at different growth stages and darkness treatment. The combination of TUA and TUB was the best choice for normalization in resting cysts and in ABA treatment, respectively. The pair of ACT and COX1 was suitable for temperature treatments. This study was the first to investigate the stable internal reference genes in dinoflagellates at different stages of life cycle,particularly in resting cysts. Our results provided useful information for selection of reference genes in dinoflagellates regarding quantification of gene expression at different experimental scenarios, which will facilitate more accurate and widespread use of q RT-PCR in gene analysis of dinoflagellates and help to design primers targeting orthologous genes in other algal species. | DENG Yunyan HU Zhangxi MA Zhaopeng TANG Ying Zhong | 2016 | Acta Oceanologica Sinica2016，35，8： | 2 |
| 7 | 基于链接结构分析的主题搜索显示文摘针对目前一般文本搜索引擎采用的关键词匹配方法导致搜索效率相对低下的问题,在分析语义相关性的度量方案基础上,利用Wikipedia丰富链接结构所蕴涵信息,提出基于链接结构分析的主题搜索策略.设计了词条相关性算法,用以描述词间距离,并对词条进行相关度的重新排序.实验中引入用户评价机制,并与传统策略搜索结果进行对比.结果证明,该策略在扩大主题覆盖度的同时保证了较高的用户意图识别度. | 余旸 Zhangxi LIN 夏国平 | 2011 | 北京工业大学学报2011，37，4： | 2 |
| 8 | CommunitystructureandtherelationshipbetweenthespidersandenvironmentinagroforestrysysteminBeijing显示文摘 | ZhangXY(张欣颖) | 2012 | 北京林业大学学报2012，，： | 1 |
| 9 | PicoRio:An Open-Source,RISC-V Small-Board Computer to Elevate the RISC-V Software Ecosystem显示文摘PicoRioTM is an open-source project stewarded by the RISC-V International Open Source(RIOS)laboratory—rioslab.org—a nonprofit research lab at Tsinghua-Berkeley Shenzhen Institute(TBSI).The RIOS Lab uses collaborative engineering from both academia and industry to elevate the RISC-V software and hardware ecosystem.In Pico Rio,we create an open,affordable,Linux-capable RISC-V hardware platform to aid software developers in porting many modern programs that require Javascript or GPUs.Pico Rio will build upon high-quality IPs and software components from expert industry engineers and academic researchers.Pico Rio is not proprietary to any specific vendor and platform,and will have complete documentation that can help people to build quality products in a short amount of time.Our plan is to ship Pico Rio 1.0 in 1H2021. | Zhangxi Tan Lin Zhang David Patterson Yi Li | 2021 | Tsinghua Science and Technology2021，26，3： | 1 |
| 10 | Extractionandseparationofgallium,indiumandthalliumwithseveralcarboxylicacidsfromchloridemedia显示文摘 | ZHANGXY YINGY HUZG | 2003 | Talanta2003，59，： | 1 |
| 11 | Adataoperationmodel based on partial vector space forbatch processing in workflow 显示文摘 | L i u J X W e n Y P L i T ZhangXY | 2011 | Concurrencyand Computation Practice and Experence2011，17，8： | 1 |
| 12 | Life Universe, Universe Body and Something from Nothing显示文摘Universe life includes the universe realm, the life realm, human society and man-made materials. Each life has four grades.There are four different “me” in each life: true me, Yang me, Yin me and conscious me. True me never dies while Yang me, Yin meand conscious me all appear and go. The heart of life is also a system consisting of four grades (true heart + Yang me heart + Yin meheart + conscious heart). Life is a four-seasonal whole dominated by heart. True me is true while Yang me, Yin me and conscious meare false. The general law of the universe is an operating body of general rules. Both the operating body of general rules and the lifebody are combination of the true and the false. The operating body of general rules is a body with two aspects and the combinationand an autonomous operation of movement with stillness, gathering with parting and rising with falling. The operating body ofgeneral rules dominated by true me is the universe body. The essential features of the universe body include: 1) it is empty;2) it isabsolutely quiet;3) it exists forever;4) it contains seeds for everything;5) it generates everything in the universe;6) it is solid andwill never break;7) its power is King Kong power. The zero-state of the galaxy is its basic state and the giant blank zone of theuniverse. The galaxy’s turning from zero-state into one-state is getting something from nothing. The operating of general rule ispresented as the four-seasonal movement or metabolism of life. It is a continuity of movement and stillness (life and death) and aprocess of something interacting with nothing. The modes of reproduction of life consist of self-generation, generation byaugmentation and generation by transformation. The Milky Way Galaxy, the solar system and the earth are inorganic life withreproductive system and reproductive capacity. In the positive-going evolution, their inner morality power gradually decreases andundergoes different states and structures. Internal intercourse generates different lives. In the early days of the earth, the temperaturewas high and inorganic lives first appeared: humans, animals, plants and bacteria. When the temperature dropped to a proper degree,organic lives then appeared: bacteria, plants, animals and humans. Now, new lives are still appearing on the earth. | Yan Jinzhong Yan Zhangxi | 2019 | Journal of Physical Science and Application2019，9，2： | 1 |
| 13 | HAMI 3379, a CysLT2 receptor antagonist, attenuates ischemia-like neuronal injury by inhibiting mieroglial activation 显示文摘 | ZHANGXY WANGXR XU D M | 2013 | J Pharmacol Exp Ther2013，346，2： | 1 |
| 14 | The variations in soil microbial communities,enzyme activities and their relationships with soil organic matter decomposition along the northern slope of Changbai Mountain显示文摘 | XUZHIWEI YUGR ZHANGXY | 2014 | Applied Soil Ecology2014，86，： | 1 |
| 15 | Event-relat-ed potential N270,a negative component to identification ofconflicting information following memory retrieval 显示文摘 | ZhangXi Wang Yu-ping Li Shun-wei | 2003 | Clin-Neurophysiol2003，114，12： | 1 |
| 16 | Study of the inhibition mechanism of imidazoline amide on CO2 corrosion of Armco iron显示文摘 | ZHANGXY WANG F P HE Y F | 2001 | Corros Sei2001，43，8： | 1 |
| 17 | Applicationofperioperativeantimicrobialinpatientsundergoingcesareancectionbeforeandafterintervention显示文摘 | HEM KONGY ZHANGXY etal | 2013 | 中国医院药学杂志2013，33，3： | 1 |
| 18 | Elevated interleukin-2,interleukin-6 and interleukin-8serum levels in neuroleptic-free schizophrenia:association with psychopathology显示文摘 | ZhangXY ZhouDF ZhangPY | 2002 | Schizophrenia Research2002，57，： | 1 |
| 19 | Analyzing the performance and fairness of BitTorrent-like networks using a general fluid model显示文摘 | Yao Yue Chuang Lin and Zhangxi Tan | 2006 | Computer Communications2006，29，18： | 1 |
| 20 | Geneticanalysisofagronomictraitsoftwodoubledhaploidpopulationsintobacco(烟草两个DH群体农艺性状的遗传分析)[J]显示文摘 | ZHUHQ(朱慧琴) ZHANGXY(张宪银) XUEQZ(薛庆中) | | 浙江农业大学学报农业与生命科学版0，，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员