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污水处理厂不停产更换阀门技术研究

山西建筑 2024年第19期50卷 119-122页

作者：陈建宁张艳青广州市第三市政工程有限公司广东广州510060

由于渗滤液具有高浓度、高盐度和高腐蚀性等特性,容易导致污水处理工艺系统中的阀门设备发生渗滤液泄漏、阀门失效等问题,从而需要通过维修或更换技术措施来保障污水处理厂的正常运行。文章研究了在带压不停产条件下更换阀门的技术,采... 详细信息

由于渗滤液具有高浓度、高盐度和高腐蚀性等特性,容易导致污水处理工艺系统中的阀门设备发生渗滤液泄漏、阀门失效等问题,从而需要通过维修或更换技术措施来保障污水处理厂的正常运行。文章研究了在带压不停产条件下更换阀门的技术,采用方案对比、理论分析及模拟实验的方法,结合故障阀门的安装位置、规格、型号及流体介质压力等技术参数,研制了一种用于带压更换阀门的新型堵板组合件及配套的综合技术。研究结果表明,该技术能够在不降低池内液位和不放空管内流体介质的情况下,实现故障阀门的更换,从而确保污水处理厂的正常运营,同时具有操作性强、施工成本低、效率高、安全环保等优点。

关键词：污水处理管道阀门堵板组合件阀门更换带压更换

INTEGRATED EVALUATION ON THE REGIONAL DEVELOPMENTAL LEVEL

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Journal of Geographical Sciences 1991年第3期 36-47页

作者： Wang Yiming chen jianning Office of Territorial Management of Ningxia Ningxia Academy of Agro-forestry Sciences

The output functions of regional economic system are principally restricted by the internal structure and external *** measurement model of regional developmental level(RDL)should be established as timely functions of a series of indexes:(?)According to RDL integrated evaluation coefficients,the 28provinces(including municipalities and autonomous regions)of China can be classified into 3 types--9 developed,6 semideveloped and 13 under-developed provinces.

关键词： regional developmental level measurement model integrated evaluation coefficient

Neutrophil extracellular traps mediate neuro-immunothrombosis

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Neural Regeneration Research 2024年第8期19卷 1734-1740页

作者： Jianbo Lou jianning Zhang Quanjun Deng Xin chen Department of Neurosurgery Tianjin Medical University General HospitalTianjinChina Tianjin Neurological Institute Key Laboratory of Post-Trauma Neuro-Repair and Regeneration in Central Nervous SystemMinistry of EducationTianjin Key Laboratory of InjuriesVariations and Regeneration of Nervous SystemTianjinChina

Neutrophil extracellular traps are primarily composed of DNA and histones and are released by neutrophils to promote inflammation and thrombosis when stimulated by various inflammato ry *** extracellular trap formation occurs through lytic and non-lytic pathways that can be further classified by formation ***,von Willebrand factor,fibrin,and many other factors participate in the interplay between inflammation and *** summarizes the intricate interplay between inflammation and thrombosis during neural development and the pathogenesis of neurological diseases,providing cutting-edge insights into post-neurotrauma thrombotic *** blood-brain barrier defends the brain and spinal cord against external assaults,and neutrophil extracellular trap involvement in blood-brain barrier disruption and immunothrombosis contributes substantially to secondary injuries in neurological *** research is needed to understand how neutrophil extracellular traps promote blood-brain barrier disruption and immunothrombosis,but recent studies have demonstrated that neutrophil extracellular traps play a crucial role in immunothrombosis,and identified modulators of ***,these neurological diseases occur in blood vessels,and the mechanisms are unclear by which neutrophil extracellular traps penetrate the blood-brain barrier to participate in immunothrombosis in traumatic brain *** review discusses the role of neutrophil extracellular traps in neuro-immunothrombosis and explores potential therapeutic interventions to modulate neutrophil extracellular traps that may reduce immunothrombosis and improve traumatic brain injury outcomes.

关键词： inflammation neuro-immunothrombosis neurologic diseases neurotrauma neutrophil extracellular traps platelet thrombosis traumatic brain injury

Theoretical analysis of the elastic Kelvin-Helmholtz instability in explosive weldings

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Defence Technology（防务技术） 2024年第2期32卷 521-528页

作者： Yuanbo Sun jianning Gou cheng Wang Qiang Zhou Rui Liu Pengwan chen Tonghui Yang Xiang Zhao State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Beijing HIWING Scientific and Technological Information Institute Beijing100084China School of Aerospace Engineering Tsinghua UniversityBeijing100084China

By considering the joint effects of the Kelvin-Helmholtz(KH) and Rayleigh-Taylor(RT) instabilities, this paper presents an interpretation of the wavy patterns that occur in explosive welding. It is assumed that the elasticity of the material at the interface effectively determines the wavelength, because explosive welding is basically a solid-state welding process. To this end, an analytical model of elastic hydrodynamic instabilities is proposed, and the most unstable mode is selected in the solid phase. Similar approaches have been widely used to study the interfacial behavior of solid metals in high-energy-density physics. By comparing the experimental and theoretical results, it is concluded that thermal softening,which significantly reduces the shear modulus, is necessary and sufficient for successful welding. The thermal softening is verified by theoretical analysis of the increase in temperature due to the impacting and sliding of the flyer and base plates, and some experimental observations are qualitatively *** summary, the combined effect of the KH and RT instabilities in solids determines the wavy morphology, and our theoretical results are in good qualitative agreement with experimental and numerical observations.

关键词： Explosive welding Hydrodynamic instabilities Elasticity

Optimal use of red cell volume distribution width-to-platelet ratio to exclude cirrhosis in patients with chronic hepatitis B

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Liver Research 2023年第3期7卷 244-251页

作者： Hongsheng Yu Chao Li Mingkai Li Zixi Liang Abdukyamu Smayi Bilan Yang Kodjo-Kunale Abassa jianning chen Bin Wu Yidong Yang Department of Gastroenterology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdongChina Guangdong Provincial Key Laboratory of Liver Disease Research GuangzhouGuangdongChina Department of Radiology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdongChina Department of Pathology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdongChina

Background and aims:Hepatitis B virus(HBV)infection is a major public health issue worldwide as it may cause serious liver diseases such as cirrhosis and hepatocellular carcinoma(HCC).Ruling out cirrhosis is important when treating chronic hepatitis B(CHB).The aim of this study was to compare the performance of the aspartate aminotransferase-to-platelet ratio index(APRI),fibrosis score based on four factors(FIB-4),and red cell volume distribution width-to-platelet ratio(RPR)in diagnosing liver fibrosis stages and to identify new cut-off values to rule out ***:Between 2005 and 2020,2182 eligible individuals who underwent liver biopsy were randomly assigned to derivation and validation cohorts in a 6:4 ratio.A grid search was applied to identify optimal cut-off values with a sensitivity of>90% and a negative predictive value(NPV)of at least 95%.Results:Overall,1309 individuals(175 patients with cirrhosis)were included in the derivation dataset,and 873(117 patients with cirrhosis)were included in the validation *** area under the receiver operating characteristic curve of RPR for diagnosing cirrhosis was 0.821,which was comparable to that of APRI(0.818,P=0.7905)and FIB-4(0.803,P=0.2395).When applying an RPR of 0.06,cirrhosis was correctly identified with a sensitivity of 93.1% and an NPV of 97.1%,while it misclassified 12 of 175(6.9%)patients in the derivation *** the validation cohort,RPR had a sensitivity and NPV of 97.4% and 99.0%,respectively,and only misclassified 3 of 117(2.6%)*** analysis indicated that the new RPR cut-off value performed more consistently than that of APRI and FIB-4 in all ***:A recently established cut-off value for RPR(≤0.06)was validated and was more effective than APRI and FIB-4 in excluding patients with cirrhosis due to a higher sensitivity and NPV and a lower misclassification *** simple and dependable test could have significant clinical implications in identifying patients

关键词： Red cell volume distribution width(RDW) Aspartate aminotransferase-to-platelet ratio index(APRI) Fibrosis score based on four factors(FIB-4) Chronic hepatitis B(CHB) Cirrhosis

Shared and Distinct Topographic Alterations of Alpha-Range Resting EEG Activity in Schizophrenia,Bipolar Disorder,and Depression

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Neuroscience Bulletin 2023年第12期39卷 1887-1890页

作者： Rui Xue Xiaojing Li jianning chen Sugai Liang Hua Yu Yamin Zhang Wei Wei Yan Xu Wei Deng Wanjun Guo Tao Li Psychiatric Laboratory State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengdu610041China Department of Neurobiology Affiliated Mental Health Center and Hangzhou Seventh People’s HospitalZhejiang University School of MedicineHangzhou310000China Liangzhu Laboratory MOE Frontier Science Center for Brain Science and Brain-machine IntegrationState Key Laboratory of Brain-machine IntelligenceZhejiang UniversityHangzhou311121China NHC and CAMS Key Laboratory of Medical Neurobiology Zhejiang UniversityHangzhou310058China

DearEditor,Schizophrenia(SCZ),bipolar disorder(BD),and major depressive disorder(MDD)are common psychiatric disorders that share several characteristics such as risk genes,and cognitive,neural,and structural abnormalities[1-3].Despite this,the boundaries between the three disorders are not clearly defined in clinical practice,and the"crosscutting"dimensional assessment of symptoms and clinical phenomena is controversial[2,4].To improve the classification criteria,it is essential to explore the underlying relationships among these disorders and address the fuzzy divergence that exists.

关键词： clinical Schizophrenia Alpha

Clinicopathological study and diagnosis of rhabdoid tumor of kidney combined with metanephric adenoma

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Chinese Medical Journal 2014年第24期127卷 4290-4291页

作者： Zhang Zhigang chen jianning Zhou Jing Liu Yong Feng Zhiying Tang Luying Jin Yi Department of Pathology the Third Affiliated Hospital Sun Yat-sen University Guangzhou Guangdong 510630 China

Rhabdoid tumor of kidney （RTK） is a highly malignant tumor that occurs in infants and children, and approximately 80% of patients are diagnosed in the first two years of life. It was firstly described in 1978, and was defined as an independent disease in 1981. In the reported literatures, there were less in adolescents and extremely rare in adults.

关键词： rhabdoid tumor metanephric adenoma kidney immunohistoehemistry pathology

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试论《南侨日报》对中国新文学的评介

福建论坛（人文社会科学版） 2005年第12期 90-93页

作者：陈建宁福建社会科学院福建福州350001

文章以《南侨日报》为研究个案,分析《南侨日报》评论和介绍中国新文学所作的努力,力图在某种程度上“还原”该时期新加坡文学书写的“历史现场”和原貌,为海外华文文学史的撰写提供必要的历史细节和现场感。

关键词：海外华文文学《南侨日报》 “人民性”

基于涌水仿真模拟对公路隧道反坡排水系统研究

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公路工程 2017年第6期42卷 143-147页

作者：陈光吉陈剑宁黎明职业大学福建泉州362000 长安大学陕西西安710062

以六盘水隧道ZK15+577~ZK13+000标段为工程实例进行涌水仿真模拟,计算了隧道底板压力、近掌子面处底板局部压力以及各标段涌水量情况。基于各标段涌水量大小设计了公路隧道反坡排水系统共得出以下几点结论:隧道左线累计一般涌水量为2 92... 详细信息

以六盘水隧道ZK15+577~ZK13+000标段为工程实例进行涌水仿真模拟,计算了隧道底板压力、近掌子面处底板局部压力以及各标段涌水量情况。基于各标段涌水量大小设计了公路隧道反坡排水系统共得出以下几点结论:隧道左线累计一般涌水量为2 920.3 m^3/d,累计雨季最大涌水量为16 425.7 m^3/d,右线累计一般涌水量为2 581.1 m^3/d,累计雨季最大涌水量为14 422.2 m^3/d;隧道左右线同时涌水时流速在涌水隧道横断面中心处最大,涌水在经过横洞时,流速较低,在交叉口处出现不规则的回旋流动;根据涌水数据算得在隧道左右线分别设置三台型号为200ZW300-18排水泵,左线设置两个集水坑,右线设置一个集水坑(尺寸均为1.5 m×1.5 m×5 m),采用分时抽水方案可顺利完成排水工作。

关键词：涌水模拟涌水量反坡排水系统排水泵