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大港油田电网SVG装置投切控制策略

油气田地面工程 2017年第6期36卷 69-73页

作者：郑双建大港油田公司电力公司

静止无功发生器(SVG)、接触器投切电容器(HVC)以及固定电容器的配合使用能够减少设备成本,但在其运行中会在几个周波内发生过补偿或欠补偿现象;同时为保证功率因数固定,当系统需补偿容量在临界值上下波动时,还会引发HVC反复投切动作,增... 详细信息

静止无功发生器(SVG)、接触器投切电容器(HVC)以及固定电容器的配合使用能够减少设备成本,但在其运行中会在几个周波内发生过补偿或欠补偿现象;同时为保证功率因数固定,当系统需补偿容量在临界值上下波动时,还会引发HVC反复投切动作,增加接触器工作强度,降低寿命。通过控制SVG和HVC投入时间以及设定功率因数定值范围,可以避免过补偿现象,并减少接触器工作强度,提高寿命。对于拥有固定电容器补偿及系统需要补偿的无功功率较稳定的情况,可以投入固定电容器从而避免HVC反复投切,提高设备寿命,实现平滑的动态无功补偿。

关键词：动态无功补偿 SVG HVC 投切控制策略

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大港油田人工岛能源综合利用方案

油气田地面工程 2018年第11期37卷 68-71页

作者：郑双建大港油田电力公司

在分析滩海油田人工岛自然资源条件和能耗情况的基础上,构建了以能源综合利用为目标的新能源微电网。在该微电网系统中,实现自发电自用,余电上网。由风力发电承担微电网内基荷,微燃机根据热负荷情况调整运行状态,储能系统平抑风力发电... 详细信息

在分析滩海油田人工岛自然资源条件和能耗情况的基础上,构建了以能源综合利用为目标的新能源微电网。在该微电网系统中,实现自发电自用,余电上网。由风力发电承担微电网内基荷,微燃机根据热负荷情况调整运行状态,储能系统平抑风力发电波动并保证重要负荷持续运行。将微电网的运行控制分为四个阶段并设计了控制策略,实现并网、离网运行及切换。人工岛新能源微电网充分利用可再生能源,实现能源的综合利用,降低油气生产能耗。

关键词：人工岛微电网控制策略可再生能源

Occurrence and molecular characterization of Cryptosporidium spp.,Giardia duodenalis,and Enterocytozoon bieneusi from Tibetan sheep in Gansu,China

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Occurrence and molecular characterization of Cryptosporidium...

Molecular epidemiology of Cryptosporidium *** dairy cattle in Guangdong Province,South China

第十一届全国寄生虫学青年工作者学术研讨会

作者： Yayun Wu Yankai Chang Yuancai Chen Xiangqian Zhang Dongfang Li shuangjian zheng Lu Wang Junqiang Li Longxian Zhang College of Animal Science and Veterinary Medicine Henan Agricultural University

Cryptosporidium spp.,Giardia duodenalis,and Enterocytozoon bieneusi are globally ubiquitous ***,little is known about the occurrence and distribution of Cryptosporidium spp.,***,and *** in Tibetan *** the present study,fecal specimens of 177 Tibetan sheep were examined by nested PCR.4.5%(n=8),1.7%(n=3) and 34.5%(n=61) of the Tibetan sheep were positive for Cryptosporidium spp.,***,and ***,*** ubiquitum was the only species found by small subunit(SSU) r RNA-based PCR,and subtyping of ***(n=6) by 60-k Da glycoprotein(gp60) revealed that all positive isolates belonged to zoonotic XIIa subtype *** genotyping at the SSU r RNA and β-giardin(bg) genes suggested that three *** positive specimens belonged to assemblage *** analysis of internal transcribed spacer(ITS) gene characterized four *** genotypes which all belonged to Group 2,one novel CGS1(n=3),and three known:CM7(n=34),BEB6(n=22) and CHS3(n=2).We employed multilocus sequence typing(MLST) using three microsatellites(MS1,MS3 and MS7),one minisatellite(MS4),and sequence analysis of MLST yielded 3,2,2 and 2 genotypes at the MS1,MS3,MS4,and MS7 loci,respectively,forming 4 *** findings elucidate the occurrence and distribution of three zoonotic pathogens in Tibetan sheep in *** subsequent and detailed data are required to better understand the transmission of Cryptosporidium spp.,***,and *** in sheep.

关键词： Cryptosporidium spp. G.duodenalis E.bieneusi zoonotic Tibetan sheep

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Molecular epidemiology of Cryptosporidium *** dairy cattle i...

第十一届全国寄生虫学青年工作者学术研讨会

作者： Nan Liang Yayun Wu Mingfei Sun Yankai Chang Xuhui Lin Linzeng Yu Suhui Hu Xiangqian Zhang shuangjian zheng Zhaohui Cui Longxian Zhang College of Animal Science and Veterinary Medicine Henan Agricultural University International Joint Research Laboratory for Zoonotic Diseases of Henan College of Animal Husbandry Engineering Henan Vocational College of Agriculture Institute of Animal Health Guangdong Academy of Agricultural Sciences

To determine the prevalence of Cryptosporidium in dairy cattle in Guangdong Province,South China,1440 fecal samples were collected from 10 farms and screened for Cryptosporidium with *** overall prevalence of Cryptosporidium was 4.38%(63/1440),and the infection rates in preweaned calves,postweaned calves,heifers and adults were 6.40%(19/297),6.19%(33/533),1.48%(4/271) and 2.06%(7/339),*** Cryptosporidium species,Cryptosporidium andersoni(n=33),Cryptosporidium bovis(n=22) and Cryptosporidium ryanae(n=8) were detected by DNA sequence analysis of the 63 positive samples,and *** was identified as the most common species on the dairy cattle *** preweaned calves,*** was the most prevalent species(9/19,47.37%).In contrast,*** was the predominant species(19/33,57.58%) in postweaned calves and the only species found in heifers and *** zoonotic species Cryptosporidium parvum was not detected in this ***-four *** isolates were successfully classified into three multilocus sequence typing(MLST) *** subtype A4,A4,A4,A1 was the predominant subtype,and MLST subtype A2,A5,A2,A1,previously found in sheep,was detected in cattle for the first time.A linkage disequilibrium analysis showed that the *** isolates had a clonal genetic population ***,further molecular studies are required to better understand the epidemiology of Cryptosporidium in Guangdong.

关键词： Cryptosporidium dairy cattle genotype Guangdong prevalence subtype

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变电站事故总信号合成浅谈

电工技术 2019年第17期 93-94页

作者：龙家文郑双健于宏芳苏占江天津大港油田电力公司生产调度中心

介绍了变电站事故总信号的概念和作用,探讨了无人值班变电站监测信息采集规范中全站事故总信号的合成方法及注意事项。

关键词：变电站事故总信号综合自动化无人值班监测信息

Prototypes,modifications,and hydrocarbon enrichment variations in basins influenced by Tethyan evolution:A comparative analysis of the Persian Gulf Basin and the Sichuan Basin

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Science China Earth Sciences 2023年第12期66卷 2871-2897页

作者： Zhiliang HE Zhijun JIN shuangjian LI Guoping BAI Xueyan LV Jinrui GUO Jian GAO Jinyin YIN Yingqiang LI Dingye zheng China Petroleum&Chemical Corporation Beijing 100728China Institute of Energy Peking UniversityBejing 100871China SINOPEC Petroleum Exploration and Production Research Institute Beijing 102206China SINOPEC Key Laboratory of Geology and Resources in Deep Stratum Beijing 102206China

The hydrocarbon accumulation modes and differences in the Tethyan realm serve as a hot research topic in the petroleum geology community at home and *** the Persian Gulf Basin in the Middle East and the Sichuan Basin in China,situated on the southern and northern sides of the Tethyan realm,respectively,record the whole geological process of the opening and closure of the Prototethys,the Paleotethys,and the Neotethys sequentially,exhibiting anomalous hydrocarbon *** on the analysis of the plate tectonic evolution in the Tethyan realm,this study dissects the structures and hydrocarbon accumulation conditions of both *** by a systematic comparative analysis of the factors controlling hydrocarbon enrichment in the process of plate breakup and convergence in the Tethyan realm,this study proposes petroleum exploration targets in the *** results are as follows:(1)Since the Meso-Neoproterozoic,the Persian Gulf Basin and the Sichuan Basin have undergone similar tectonic evolution in the early stage but different in the late *** the influence of the formation and evolution of the Prototethys,Paleotethys,and Neotethys oceans,both basins experienced multi-stage development and modification,forming two major extension-convergence ***,both basins are characterized by the vertical orderly superimposition of various basin prototypes in the order of rift-intracratonic basin(passive continental margin)-foreland.(2)The fact that the Tethyan realm was long located at medium-low latitudes and the local anoxic environment formed in the process of plate breakup and convergence played a vital role in the formation of extensive source *** source rocks are predominantly distributed in underfilled rifts and deep depressions that were connected to the ocean in the unidirectional continental breakup process;basin-slopes and intra-shelf basins on passive continental margins;basinal lows within intracratonic basins,and underfill

关键词： Tethyan realm Unidirectional breakup and convergence Basin prototype Structural modification Hydrocarbon enrichment Exploration target Persian Gulf Basin Sichuan Basin

西藏林芝地区不同养殖模式藏猪肠道寄生虫感染情况调查

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畜牧与兽医 2018年第7期50卷 88-91页

作者：周春香李东方郑双健王璐陈远才王璐阳毋亚运常艳凯陶建平张龙现扬州大学兽医学院江苏扬州225009 河南农业大学牧医工程学院河南郑州450000

藏猪是西藏特有的高原型猪种,肠道寄生虫感染是影响藏猪养殖经济效益的重要因素之一。为了解西藏藏猪肠道寄生虫感染情况,从西藏林芝地区采集放牧养殖模式和养殖场散养模式藏猪粪便样品共715份,采用卢戈氏碘液法和饱和蔗糖溶液漂浮法并... 详细信息

藏猪是西藏特有的高原型猪种,肠道寄生虫感染是影响藏猪养殖经济效益的重要因素之一。为了解西藏藏猪肠道寄生虫感染情况,从西藏林芝地区采集放牧养殖模式和养殖场散养模式藏猪粪便样品共715份,采用卢戈氏碘液法和饱和蔗糖溶液漂浮法并镜检观察。结果显示：藏猪肠道寄生虫总感染率为64.34%（460/715）,检出的5种寄生虫感染率分别为：球虫20.42%（146/715）、圆线虫16.92%（121/715）、鞭虫1.54%（11/715）、阿米巴原虫37.90%（271/715）和蛔虫23.08%（165/725）。放牧养殖模式寄生虫感染率为90.10%（91/101）,高于养殖场散养模式的60.10%（369/614）,且放牧养殖模式和养殖场散养模式藏猪感染的优势虫种分别是球虫和阿米巴、阿米巴和蛔虫。调查结果表明养殖场散养模式有助于藏猪肠道寄生虫的防控,但仍然要加强对藏猪肠道寄生虫的诊断和防治。

关键词：西藏藏香猪养殖模式寄生虫

Surgical resection plus radiofrequency ablation for the treatment of multifocal hepatocellular carcinoma

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Hepatobiliary Surgery and Nutrition 2019年第1期8卷 19-28页

作者： Cheng Zhou Yuanfei Peng Kaiqian Zhou Lan Zhang Xiangyu Zhang Lei Yu Jie Hu Feiyu Chen shuangjian Qiu Jian Zhou Jia Fan zhenggang Ren zheng Wang Liver Cancer Institute and Department of Liver Surgery Zhongshan HospitalSchool of Life SciencesFudan UniversityShanghai 200032China Institute of Biomedical Sciences School of Life SciencesFudan UniversityShanghai 200032China State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development School of Life SciencesFudan UniversityShanghai 200032China

Background:To compare the efficacy and safety of surgical resection plus radiofrequency ablation(SR-RFA)with transarterial chemoembolization(TACE)in patients with multifocal hepatocellular carcinoma(HCC)beyond the Milan ***:From 2009 to 2015,a total of 469 consecutive patients with multifocal HCC beyond the Milan criteria(≤5 nodules)treated with SR-RFA(n=59)or TACE(n=410)were *** overall survival(OS)rate was compared through propensity score matching(PSM)analysis at a ratio of 1:2,and 141 patients were identified(SR-RFA,n=47;TACE,n=94).Subgroup analysis was conducted according to factors associated with treatment ***:Before PSM,the 1-,2-and 3-year OS rates were 81.5%,68.3%and 64.3%in the SR-RFA group and 58.7%,35.5%and 24.4%in the TACE group,respectively(all P<0.001).After PSM,the 1-,2-and 3-year OS rates in the SR-RFA group were 81.8%,68.7%and 63.4%,whereas those in the TACE group were 59.3%,36.1%and 19.4%,respectively(all P<0.001).Subgroup analysis also revealed a survival advantage of SR-RFA over TACE in each *** 30-day mortality rate was 1.22%in the TACE group and nil in the SR-RFA group(P=0.861).Conclusions:SR-RFA provides better a long-term survival rate than TACE for patients with multifocal HCC beyond the Milan ***-RFA may serve as an alternative treatment for patients with multifocal HCC in a selected patient population.

关键词： Hepatocellular carcinoma(HCC) radiofrequency ablation(RFA) surgical resection(SR) transarterial chemoembolization(TACE) survival rate

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四川盆地寒武系盐相关构造及其控油气作用

石油与天然气地质 2014年第5期35卷 622-631,638页

作者：李双建孙冬胜郑孟林孟宪武中国石化石油勘探开发研究院北京100083 中国石化构造与储层实验室北京100083 中国石化西南油气分公司贵州贵阳550001

四川盆地东部和南部中、下寒武统广泛发育膏盐岩层系,形成了多种样式的盐相关构造。依据露头、钻井和地震资料分析,认为四川盆地寒武系膏盐岩形成于克拉通内局限台地环境,具有时代老、埋藏深、厚度分布不均、膏多盐少及伴生岩石类型多... 详细信息

四川盆地东部和南部中、下寒武统广泛发育膏盐岩层系,形成了多种样式的盐相关构造。依据露头、钻井和地震资料分析,认为四川盆地寒武系膏盐岩形成于克拉通内局限台地环境,具有时代老、埋藏深、厚度分布不均、膏多盐少及伴生岩石类型多样等特点。受膏岩和盐岩流动性差异、构造挤压、基底断裂和滑脱作用等多种因素影响,膏盐岩层系相关构造分层性明显。盐上层表现为背斜、推覆体和断块背斜构造;盐层表现为盐枕构造、盐缩颈形成的鱼尾构造和岩盐塑性流动构造;盐下层则表现为受复杂基底断裂控制的叠瓦冲断和背冲断块构造。寒武系膏盐岩为震旦系-下寒武统目的层系的油气聚集提供了优质的封盖条件;同时,膏盐岩自身参与的TSR反应(硫酸盐热化学还原反应)和表生溶蚀也可以有效地改善储层的储集物性。更重要是,寒武系膏盐岩作为区域滑脱层对盐上和盐下震旦系-下古生界构造变形起着重要控制作用,形成一系列含油气构造圈闭。从盐相关构造的发育特点来看,鄂西-渝东区的盐下断背斜和川东南地区的盐上断背斜是有利的勘探目标。

关键词：盐相关构造膏盐岩控油气作用勘探目标寒武系四川盆地