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| 1 | Interaction between the gut microbiome and mucosal immune system显示文摘The gut microbiota, the largest symbiotic ecosystem with the host, has been shown to play important roles in maintaining intestinal homeostasis. Dysbiosis of the gut microbiome is caused by the imbalance between the commensal and pathogenic microbiomes. The commensal microbiome regulates the maturation of the mucosal immune system, while the pathogenic microbiome causes immunity dysfunction, resulting in disease development.The gut mucosal immune system, which consists of lymph nodes, lamina propria and epithelial cells, constitutes a protective barrier for the integrity of the intestinal tract. The composition of the gut microbiota is under the surveillance of the normal mucosal immune system. Inflammation, which is caused by abnormal immune responses,influences the balance of the gut microbiome, resulting in intestinal diseases. In this review, we briefly outlined the interaction between the gut microbiota and the immune system and provided a reference for future studies. | Na Shi Na Li Xinwang Duan Haitao Niu | 2017 | Military Medical Research2017，4，3： | 65 |
| 2 | 2018 Chinese Pediatric Cardiology Society(CPCS) guideline for diagnosis and treatment of syncope in children and adolescents显示文摘Syncope belongs to the transient loss of consciousness(TLOC), characterized by a rapid onset, short duration, and spontaneous complete recovery. It is common in children and adolescents, accounting for 1% to 2% of emergency department visits.Recurrent syncope can seriously affect children's physical and mental health, learning ability and quality of life and sometimes cardiac syncope even poses a risk of sudden death. The present guideline for the diagnosis and treatment of syncope in children and adolescents was developed for guiding a better clinical management of pediatric syncope. Based on the globally recent development and the evidence-based data in China, 2018 Chinese Pediatric Cardiology Society(CPCS) guideline for diagnosis and treatment of syncope in children and adolescents was jointly prepared by the Pediatric Cardiology Society, Chinese Pediatric Society, Chinese Medical Association(CMA)/Committee on Pediatric Syncope, Pediatricians Branch, Chinese Medical Doctor Association(CMDA)/Committee on Pediatric Cardiology, Chinese College of Cardiovascular Physicians, Chinese Medical Doctor Association(CMDA)/Pediatric Cardiology Society, Beijing Pediatric Society, Beijing Medical Association(BMA). The present guideline includes the underlying diseases of syncope in children and adolescents, the diagnostic procedures, methodology and clinical significance of standing test and headup tilt test, the clinical diagnosis vasovagal syncope, postural orthostatic tachycardia syndrome, orthostatic hypotension and orthostatic hypertension, and the treatment of syncope as well as follow-up. | Cheng Wang Yaqi Li Ying Liao Hong Tian Min Huang Xiangyu Dong Lin Shi Jinghui Sun Hongfang Jin Junbao Du Jindou An Jie Chen Mingwu Chen Qi Chen Sun Chen Yonghong Chen Zhi Chen Adolphus Kai-tung Chau Junbao Du Zhongdong Du Junkai Duan Hongyu Duan Xiangyu Dong Lin Feng Lijun Fu Fangqi Gong Yonghao Gui Ling Han Zhenhui Han Bing He Zhixu He Xiufen Hu Yimin Hua Guoying Huang Min Huang Ping Huang Yujuan Huang Hongfang Jin Mei Jin Bo Li Fen Li Tao Li Xiaohui Li Xiaoyan Liu Yan Li Haitao Lv Tiewei Lv Zipu Li Luyi Ma Silin Pan Yusheng Pang Hua Peng Yuming Qin Jie Shen Lin Shi Kun Sun Jinghui Sun Hong Tian Jie Tian Cheng Wang Hong Wang Lei Wang Jinju Wang Wendi Wang Yuli Wang Rongzhou Wu Tianhe Xia Yanyan Xiao Chunhong Xie Yanlin Xing Zhenyu Xiong Baoyuan Xu Yi Xu Hui Yan Shiwei Yang Qijian Yi Xia Yu Xianyi Yu Yue Yuan Hongyan Zhang Huili Zhang Li Zhang Qingyou Zhang Xi Zhang Yanmin Zhang Zhiwei Zhang Cuifen Zhao Bin Zhou Hua Zhu | 2018 | Science Bulletin2018，63，23： | 54 |
| 3 | Hydrogen sulfide regulates abiotic stress tolerance and biotic stress resistance in Arabidopsis显示文摘Hydrogen sulfide(H_2S) is an important gaseous molecule in various plant developmental processes and plant stress responses.In this study,the transgenic Arabidopsis thaliana plants with modulated expressions of two cysteine desulfhydrases,and exogenous H_2S donor(sodium hydrosulfide,NaHS) and H_2S scavenger(hypotaurine,HT) pre-treated plants were used to dissect the involvement of H_2S in plant stress responses.The cysteine desulfhydrases overexpressing plants and NaHS pre-treated plants exhibited higher endogenous H_2S level and improved abiotic stress tolerance and biotic stress resistance,while cysteine desulfhydrases knockdown plants and HT pre-treated plants displayed lower endogenous H_2S level and decreased stress resistance.Moreover,H_2S upregulated the transcripts of multiple abiotic and biotic stress-related genes,and inhibited reactive oxygen species(ROS) accumulation.Interestingly,MIR393-mediated auxin signaling including MIR393a/b and their target genes(TIR1,AFB1,AFB2,and AFB3) was transcriptionally regulated by H_2S,and was related with H_2S-induced antibacterial resistance.Moreover,H_2S regulated 50 carbon metabolites including amino acids,organic acids,sugars,sugar alcohols,and aromatic amines.Taken together,these results indicated that cysteine desulfhydrase and H_2S conferred abiotic stress tolerance and biotic stress resistance,via affecting the stress-related gene expressions,ROS metabolism,metabolic homeostasis,and MIR393-targeted auxin receptors. | Haitao Shi Tiantian Ye Ning Han Hongwu Bian Xiaodong Liu Zhulong Chan | 2015 | Journal of Integrative Plant Biology2015，57，7： | 26 |
| 4 | The principle of the positioning system based on communication satellites显示文摘It is a long dream to realize the communication and navigation functionality in a satellite system in the world. This paper introduces how to establish the system, a positioning system based on communication satellites called Chinese Area Positioning System (CAPS). Instead of the typical navigation satellites, the communication satellites are configured firstly to transfer navigation signals from ground stations, and can be used to obtain service of the positioning, velocity and time, and to achieve the function of navigation and positioning. Some key technique issues should be first solved; they include the accuracy position determination and orbit prediction of the communication satellites, the measur- ing and calculation of transfer time of the signals, the carrier frequency drift in communication satellite signal transfer, how to improve the geometrical configuration of the constellation in the system, and the integration of navigation & communication. Several innovative methods are developed to make the new system have full functions of navigation and communication. Based on the development of crucial techniques and methods, the CAPS demonstration system has been designed and developed. Four communication satellites in the geosynchronous orbit (GEO) located at 87.5°E, 110.5°E, 134°E, 142°E and barometric altimetry are used in the CAPS system. The GEO satellites located at 134°E and 142°E are decommissioned GEO (DGEO) satellites. C-band is used as the navigation band. Dual frequency at C1=4143.15 MHz and C2=3826.02 MHz as well as dual codes with standard code (CA code and precision code (P code)) are adopted. The ground segment consists of five ground stations; the master station is in Lintong, Xi’an. The ground stations take a lot of responsibilities, including monitor and management of the operation of all system components, determination of the satellite position and prediction of the satellite orbit, accomplishment of the virtual atomic clock measurement, transmission and receiving navigation signals to and from each satellite. In the north, the south, the east, the west and the center of Chinese main land, the function of CAPS demonstration system is checked and measured. In cars and on board the system is also checked and measured. The results are as follow: CA-code, horizontal positioning accuracy, 15-25 m (1σ), vertical, 1-3 m; P-code, horizontal positioning accuracy, 8-10 m (1σ), vertical, 1-3 m; velocity accuracy, CA-code, 0.13-0.30 m/s, P-code, 0.15-0.17 m/s; time accuracy, CA-code, 160 ns, P-code, 13 ns; determination accuracy of orbit ≤2 m. About 20 million US $ and two years are spent for the development of demonstration. A complete CAPS system is now being established. | AI GuoXiang SHI HuLi WU HaiTao LI ZhiGang GUO Ji | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，3： | 21 |
| 5 | Comparative proteomic and metabolomic analyses reveal mechanisms of improved cold stress tolerance in bermudagrass (Cynodon dactylon(L.) Pers.) by exogenous calcium显示文摘As an important second messenger, calcium is involved in plant cold stress response, including chilling(<20 °C) and freezing(<0 °C). In this study, exogenous application of calcium chloride(CaCl2) improved both chilling and freezing stress tolerances, while ethylene glycol‐bis‐(b‐aminoethyl) ether‐N,N,N,N‐tetraacetic acid(EGTA) reversed CaCl2 effects in bermudagrass(Cynodon dactylon(L.) Pers.).Pysiological analyses showed that CaCl2 treatment alleviated the reactive oxygen species(ROS) burst and cell damage triggered by chilling stress, via activating antioxidant enzymes,non‐enzymatic glutathione antioxidant pool, while EGTA treatment had the opposite effects. Additionally, comparative proteomic analysis identified 51 differentially expressed proteins that were enriched in redox, tricarboxylicacid cycle,glycolysis, photosynthesis, oxidative pentose phosphate pathway, and amino acid metabolisms. Consistently, 42 metabolites including amino acids, organic acids, sugars, and sugar alcohols were regulated by CaCl2 treatment under control and cold stress conditions, further confirming the Researchcommon modulation of CaCl2 treatment in carbon metabolites and amino acid metabolism. Taken together, this study reported first evidence of the essential and protective roles of endogenous and exogenous calcium in bermudagrass response to cold stress, partially via activation of the antioxidants and modulation of several differentially expressed proteins and metabolic homeostasis in the process of cold acclimation. | Haitao Shi Tiantian Ye Bao Zhong Xun Liu Zhulong Chan | 2014 | Journal of Integrative Plant Biology2014，56，11： | 19 |
| 6 | Prediction of pathological nodal stage of locally advanced rectal cancer by collective features of multiple lymph nodes in magnetic resonance images before and after neoadjuvant chemoradiotherapy显示文摘Objective:To predict pathological nodal stage of locally advanced rectal cancer by a radiomic method that uses collective features of multiple lymph nodes(LNs)in magnetic resonance images before and after neoadjuvant chemoradiotherapy(NCRT).Methods:A total of 215 patients were included in this study and chronologically divided into the discovery cohort(n=143)and validation cohort(n=72).In total,2,931 pre-NCRT LNs and 1,520 post-NCRT LNs were delineated from all visible rectal LNs in magnetic resonance images.Geometric,first-order and texture features were extracted from each LN before and after NCRT.Collective features are defined as the maximum,minimum,mean,median value and standard deviation of each feature from all delineated LNs of each participant.LN-model is constructed from collective LN features by logistic regression model with L1 regularization to predict pathological nodal stage(ypN0 or ypN+).Tumor-model is constructed from tumor features for comparison by using DeLong test.Results:The LN-model selects 7 features from 412 LN features,and the tumor-model selects 7 features from 82 tumor features.The area under the receiver operating characteristic curve(AUC)of LN-model in the discovery cohort is 0.818[95%confidence interval(95%CI):0.745-0.878],significantly(Z=2.09,P=0.037)larger than 0.685(95%CI:0.602-0.760)of the tumor-model.The AUC of LN-model in validation cohort is 0.812(95%CI:0.703-0.895),significantly(Z=3.106,P=0.002)larger than 0.517(95%CI:0.396-0.636)of the tumor-model.Conclusions:The usage of collective features from all visible rectal LNs performs better than the usage of tumor features for the prediction of pathological nodal stage of locally advanced rectal cancer. | Haitao Zhu Xiaoyan Zhang Xiaoting Li Yanjie Shi Huici Zhu Yingshi Sun | 2019 | Chinese Journal of Cancer Research2019，31，6： | 13 |
| 7 | Improvement of plant abiotic stress tolerance through modulation of the polyamine pathway显示文摘Polyamines(mainly putrescine(Put),spermidine(Spd),and spermine(Spm))have been widely found in a range of physiological processes and in almost all diverse environmental stresses.In various plant species,abiotic stresses modulated the accumulation of polyamines and related gene expression.Studies using loss-of-function mutants and transgenic overexpression plants modulating polyamine metabolic pathways confirmed protective roles of polyamines during plant abiotic stress responses,and indicated the possibility to improve plant tolerance through genetic manipulation of the polyamine pathway.Additionally,putative mechanisms of polyamines involved in plant abiotic stress tolerance were thoroughly discussed and crosstalks among polyamine,abscisic acid,and nitric oxide in plant responses to abiotic stress were emphasized.Special attention was paid to the interaction between polyamine and reactive oxygen species,ion channels,amino acid and carbon metabolism,and other adaptive responses.Further studies are needed to elucidate the polyamine signaling pathway,especially polyamine-regulated downstream targets and the connections between polyamines and other stress responsive molecules. | Haitao Shi Zhulong Chan | 2014 | Journal of Integrative Plant Biology2014，56，2： | 13 |
| 8 | Plasma-induced nanowelding of a copper nanowire network and its application in transparent electrodes and stretchable conductors显示文摘铜 nanowires (Cu NW ) 由于他们的突出的电的性质和低费用为电子学作为积木吸引了增加的注意。然而,无所不在地在 Cu NW 的表面上存在的器官的残余和氧化物层阻碍好内部电线的接触。象热退火和酸处理那样的通常使用的方法经常导致 nanowire 损坏。此处,在房间温度的氢血浆处理被表明了为同时的表面在连接清洗并且选择焊接 Cu NW 有效。有优秀光电的性能的透明电极(19 O 汯獹獩琠浥数慲畴敲漠 ??? ‰ ???????璪?? | Ranran Wang Haitao Zhai Tao Wang Xiao Wang Yin Cheng Liangjing Shi Jing Sun | 2016 | Nano Research2016，9，7： | 11 |
| 9 | Effects of Body Size and Environmental Factors on the Acoustic Structure and Temporal Rhythm of Calls in Rhacophorus dennysi显示文摘In anurans, the outcomes of male-male contests and female choice are often associated with body size. In some species, males evaluate an opponent's fighting ability and females evaluate male quality on the basis of male communication signals, which are thought to reflect information concerning male body size. Nevertheless, previous studies reveal that male call structure is not always correlated with body size. In the present study we investigated the relationships between body size and call structure in the large treefrog, Rhacophorus dennysi, as well as the relationship of its calling behavior with air temperature and humidity. The results show that both the dominant and fundamental frequencies are negatively correlated with body size, while inter-note intervals are positively correlated with body size, indicating that call characters could reflect body size in this species.Additionally, calling in this tropical species exhibits a circadian rhythm insofar as relatively high temperature and low humidity during the day is associated with less vocal behavior. Thus, individual variations in call structure are mainly dependent on body size while the temporal rhythm of calling activity is affected by environmental conditions in large treefrogs. | Jichao WANG Jianguo CUI Haitao SHI Steven E.BRAUTH Yezhong TANG | 2012 | Asian Herpetological Research2012，3，3： | 10 |
| 10 | YEATS2 是一个选择 histone crotonylation 读者显示文摘 | Dan Zhao Haipeng Guan Shuai Zhao Wenyi Mi Hong Wen Yuanyuan Li Yingming Zhao C David Allis Xiaobing Shi Haitao Li | 2016 | Cell Research2016，26，5： | 9 |
| 11 | MicroRNA-4661 inhibits antiviral innate immune response by targeting interferon-alpha显示文摘 | Yingke Li Xiaohua Fan Xingying He Haijing Sun Zui Zou Hongbin Yuan Haitao Xu Chengcai Wang Xueyin Shi | 2012 | Cellular & Molecular Immunology2012，9，6： | 8 |
| 12 | Allele-defined genome reveals biallelic differentiation during cassava evolution显示文摘Dear Editor,Generation of heterozygous genomes by hybridization between or within species can help maintain plant diversity and serve as a potential source of new species(Baek et al.,2018).Moreover,genomic heterozygosity is associated with genomic coadaptation,developmental stability,and heterosis.Accurate definition of alleles in haplotypes is necessary to precisely characterize allelic variation controlling agriculturally important traits(Shi et al.,2019).Currently,most released genomes have mosaic assembly of haplotypes due to random selection or collapse of alleles during genome assembly(Shi et al.,2019),which masked allelic variation and functional differentiation of divergent alleles in heterozygous species. | Wei Hu Changmian Ji Haitao shi Zhe Liang Zehong Ding Jianqiu Ye Wenjun Ou Gang Zhou Weiwei Tie Yan Yan Jinghao Yang Xiaoying Yang Yunxie Wei Zhiqiang Jin Jianghui Xie Ming Peng Wenquan Wang Anping Guo Biyu Xu Jianchun Guo Songbi Chen Liming Ma Mingcheng Wang Yang Zhou Xiaolong Li Ruoxi Li Siyi Guo Xinhui Xiao Zhongqing Wan Feifei An Jie Zhang Qingyun Leng Yin Li Ray Ming Kaimian Li | 2021 | Molecular Plant2021，14，6： | 8 |
| 13 | Interspecific Differences in Diet between Introduced Red-eared Sliders and Native Turtles in China显示文摘Although the alien Red-eared slider(Trachemys scripta elegans) is generally argued as an invasive species that competes with native turtles,the fi eld evidence on its diet is controversial.Field studies conducted at the Gutian Nature Reserve of Guangdong and along the Wanquan River in Hainan,China show that T.s.elegans is an opportunitic omnivore,consuming a wide variety of food items.Consumption varies throughout its range;more plant material is consumed in Guangdong,compared to a more carnivorous diet in Hainan;and juveniles are also found to have a more carnivorous diet than adults.This implies a high adaptability to new environment.Sympatric native Mauremys sinensis shows a more herbivorous diet and a narrower niche breadth(0.0260) in Hainan,plus a low niche overlap(0.3048) with T.s.elegans,providing a potential empty niche for the invasive T.s.elegans.Red-eared slider is also known to consume large quantities of native prey species to disrupt the ecological balance.It is imperative to understand the invasive nature of this species and the mechanisms by which it affects native ecology. | Jian WANG Haitao SHI Shijia HU Kai MA Chuang LI | 2013 | Asian Herpetological Research2013，4，3： | 7 |
| 14 | Protective effect of hydroxychloroquine on rheumatoid arthritis-associated atherosclerosis显示文摘Background: Patients with rheumatoid arthritis (RA) have an increased risk for cardiovascular disease. We examined the effect of gut microbiota in a mouse model of RA that develops atherosclerosis. Methods: We created three groups of K/BxN female mice that were positive for the anti‐glucose‐6‐phosphate isomerase (GPI) antibody: control diet (CD), high fat diet (HFD), and HFD with hydroxychloroquine (HFD + HCQ). Serological tests were used to detect the serum levels of total cholesterol (TCHO), low‐density lipoprotein cholesterol (LDL‐C), triglyceride (TG), high‐density lipoprotein cholesterol (HDL‐C), anti‐ GPI antibody titers, and serum cytokines. Atherosclerotic plaque was determined by histological analysis, and gut microbiota were determined by 16sV4 sequencing. Results: Relative to mice given the CD, those receiving the HFD had increased serum levels of LDL‐C, TCHO, and TG, decreased serum levels of HDL‐C, increased atherosclerotic lesions in the aortic root, and altered gut microbiota. Addition of HCQ to HFD decreased the serum levels of LDL‐C, TCHO, and TG, increased serum levels of HDL‐C, and decreased the atherosclerotic lesions in the aortic root. Mice receiving HFD + HCQ also had the greatest bacterial diversity among the three experimental groups. Moreover, HCQ treatment significantly increased the abundance of Akkermansia and Parabacteroides, and decreased the abundance of Clostridium sensu stricto cluster 1, and therefore may be responsible for the reduced RA‐associated atherosclerosis and dyslipidemia. Conclusion: Our mouse model of RA indicated that HFD increased ankle width and aggravated a therosclerosis a nd d yslipidemia, a nd t hat H CQ a lleviated t he d yslipidemia and atherosclerosis, but had no effect on ankle width. | Na Shi Shuangyue Zhang Gregg Silverman Mengtao Li Jun Cai Haitao Niu | 2019 | Animal Models and Experimental Medicine2019，2，2： | 6 |
| 15 | Novel fabrication of copper nanowire/cuprous oxidebased semiconductor-liquid junction solar cells显示文摘Cu nanowire (NW )/cuprous 氧化物(Cu 2 O ) 有极大地提高的效率和减少的费用的基于的半导体液体连接太阳能电池被装配。Cu NW 象 Cu NWs/ Cu 2 O 同轴的结构,它显著地有益于费用分离。最好的太阳能电池在模仿的 AM1.5G 照明下面象 1.92% 一样高到达了变换效率,它基于做氟的符号的听氧化物和 Cu 2 O。 | Haitao Zhai Ranran Wang Weiqi Wang Xiao Wang Yin Cheng Liangjing Shi Yangqiao Liu Jing Sun | 2015 | Nano Research2015，8，10： | 6 |
| 16 | Preparation and characterization of AlN seeds for homogeneous growth显示文摘Large size AlN bulk crystal has been grown on SiC heterogeneous seed by physical vapor transport (PVT). The properties of AlN wafer were characterized by high resolution X-ray diffraction (HRXRD), Raman spectroscopy, etched method and atomic force microscope (AFM). Growth mechanism of AlN crystal grown on heterogeneous SiC seeds was proposed. Crystallization quality of AlN samples were improved with the growth process, which is associated with the growth mechanism. AlN single wafer has excellent crystallization quality, which is indicated by HRXRD showing the (0002),(1012) XRD FWHM of 76.3,52.5 arcsec, respectively. The surface of the AlN wafer is measured by AFM with a roughnessof 0.15 nm, which is a promising seed for AlN homogeneous growth. | Li Zhang Haitao Qi Hongjuan Cheng Lei Jin Yuezeng Shi | 2019 | Journal of Semiconductors2019，40，10： | 5 |
| 17 | Nano-selenium controlled cadmium accumulation and improved photosynthesis in indica rice cultivated in lead and cadmium combined paddy soils显示文摘Selenium nanoparticles(Se NPs) are less toxic and more biocompatible than selenite or selenate. However, studies involving spraying with Se NPs for reducing accumulation of cadmium(Cd) and lead(Pb) in rice grains have been rarely reported as yet. Herein, indica rice seedlings cultivated in Cd + Pb-spiked paddy soils(denoted as positive control) were sprayed with Se NPs sols for four times from tillering to booting stage. Compared to positive control, 50–100 μmol/L Se NPs downregulated Cd transporters-related genes such as Os LCT 1, OsH MA 2 and Os CCX2 in leaves and OsLCT1, Os PCR1 and Os CCX2 genes in node I at filling stage. Meanwhile, Se-binding protein 1 was distinctly elevated, involving the repression of Cd and Pb transportation to rice grains. Se NPs also differentially improved RuBP carboxylase and chlorophylls especially some key genes and proteins involving photosynthetic system. Besides, 25–50 μmol/L Se NPs diminished reactive oxygen species overproduction from NADPH oxidases whereas boosted glutathione peroxidase, reducing protein carbonylation in rice seedlings. However, the antioxidant isozymes and oxidatively modified proteins were slightly rebounded at 100 μmol/L. Se contents were noticeably elevated and confirmed to exist as selenomethionine in the rice grains following all the treatments by Se NPs. Thus, the optimal dosage of Se NPs for foliar application is 50 μmol/L, which significantly decreased Cd accumulation, improved photosynthesis and Se enrichment whereas caused no distinct reduction of Pb in the grains. Thus, an appropriate dosage of Se NPs can be conducted to decrease Cd accumulation, improve photosynthesis, and organic Se contents in rice grains. | Chengrun Wang Tingting Cheng Haitao Liu Fangyun Zhou JifengZhang Min Zhang Xinya Liu Wenjun Shi Tong Cao | 2021 | Journal of Environmental Sciences2021，33，5： | 5 |
| 18 | Transparent heaters based on highly stable Cu nanowire films显示文摘尽管有灵活、透明的电影加热器的最近的成功的示范,有高光的发射度和低应用直接电流(DC ) 的大多数加热器电压是基于的银 nanowire (Ag NW ) 或银基于格子。在这研究,灵活、可拉长的铜 nanowire (Cu NW ) 基于透明电影加热器通过一个基于答案的过程,恐水病的聚合物的薄层在 Cu NW 电影上在被包含被制作。薄聚合物层在严厉严峻的条件下面保护了这些电影免受氧化的伤害,即,高温度,高湿度,和酸、碱的环境。这些电影展出了显著性能,一个宽操作温度范围(多达 150 | Haitao Zhai Ranran Wang Xiao Wang Yin Cheng Liangjing Shi Jing Sun | 2016 | Nano Research2016，9，12： | 5 |
| 19 | Research on Large Volume Airgun Source Signal Reception in Hutubi, Xinjiang Using Seismic Network Data显示文摘We used data from the Xinjiang Digital Seismic Network and PSD( Power Spectral Density) method to perform noise level assessment for six stations. We calculated the median of the power spectral density to evaluate the noise level of different stations. After the comparison of the power spectral density of different stations and the airgun signal recognition,we found that noise level of stations with recognizable airgun source signals is lower than that of stations without recognizable signals. The largest difference of the power spectral density is 40 d B,and the smallest is 15 d B. Finally,we found that the failure to recognize the signal of airgun sources at some stations is due to the noise level. | Su Jinbo Wang Qiong Wang Haitao Shi Yongjun Chen Xiangjun Feng Lei Chen Hao Zhang Wenxiu | 2016 | Earthquake Research in China2016，30，3： | 4 |
| 20 | Fluid Property Discrimination in Dolostone Reservoirs Using Well Logs显示文摘The Ordovician Majiagou Formation is one of the main gas-producing strata in the Ordos Basin,China.The identification of hydrocarbon-bearing intervals via conventional well logs is a challenging task.This study describes the litholog of Ma 5(Member 5 of Majiagou Formation)dolostones,and then analyzes the responses of various conventional well logs to the presences of natural gas.The lithology of the gas bearing layers is dominantly of the dolomicrite to fine to medium crystalline dolomite.Natural gas can be produced from the low resistivity layers,and the dry layers are characterized by high resistivities.Neutron-density crossovers are not sensitive to the presences of natural gas.In addition,there are no significant increases in sonic transit times in natural gas bearing layers.NMR(nuclear magnetic resonance)logs,DSI(Dipole Sonic Imager)logs and borehole image logs(XRMI)are introduced to discriminate the fluid property in Majiagou dolostone reservoirs.The gas bearing intervals have broad NMR T2(transverse relaxation time)spectrum with tail distributions as well as large T2gm(T2 logarithmic mean values)values,and the T2 spectrum commonly display polymodal behaviors.In contrast,the dry layers and water layers have low T2gm values and very narrow T2 spectrum without tails.The gas bearing layers are characterized by low Vp/Vs ratios,low Poisson’s ratios and low P-wave impedances,therefore the fluid property can be discriminated using DSI logs,and the interpretation results show good matches with the gas test data.The apparent formation water resistivity(AFWR)spectrum can be derived from XRMI image logs by using the Archie’s formula in the flushed zone.The gas bearing layers have broad apparent formation water resistivity spectrum and tail distributions compared with the dry and water layers,and also the interpretation results from the image logs exhibit good agreement with the gas test data.The fluid property in Majiagou dolostone reservoirs can be discriminated through NMR logs,DSI logs and borehole image logs.This study helps establish a predictable model for fluid property in dolostones,and have implications in dolostone reservoirs with similar geological backgrounds worldwide. | WANG Guiwen LAI Jin LIU Bingchang FAN Zhuoying LIU Shichen SHI Yujiang ZHANG Haitao CHEN Jing | 2020 | Acta Geologica Sinica(English Edition)2020，94，3： | 4 |
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