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发电厂冷却工艺用水发展现状与展望

工业水处理 2024年第4期44卷 46-57页

作者：刘欣刘玮龙国军张天成杨文强西安热工研究院有限公司陕西西安710054 华能烟台八角热电有限公司山东烟台265503

冷却工艺用水是发电厂总用水量的主要部分。随着全球淡水资源持续紧缺,改进冷却工艺系统、提高冷却水使用效率的必要性和迫切性日益凸显。从多个方面对发电厂冷却工艺节约用水进行了论述,概述了现有冷却工艺的局限性;介绍了对发电厂冷... 详细信息

冷却工艺用水是发电厂总用水量的主要部分。随着全球淡水资源持续紧缺,改进冷却工艺系统、提高冷却水使用效率的必要性和迫切性日益凸显。从多个方面对发电厂冷却工艺节约用水进行了论述,概述了现有冷却工艺的局限性;介绍了对发电厂冷却系统进行改进和优化以实现节水、降耗的新工艺;探讨了以海水和再生水为代表的非传统水源应用于冷却系统的可能性,以及将其应用于冷却工艺时可能面临的复杂性和挑战;介绍了冷却水处理和水质监测的关键技术,阐述了相关技术改进所能带来的节水效果;最后提出了冷却水管理方面存在的机遇与挑战。

关键词：冷却水再生水海水冷却发电厂

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本体感觉评估在脑瘫儿童中的应用

中国儿童保健杂志 2024年第5期32卷 534-537,565页

作者：刘方贠国俊黄美欢郭莹莹赵欣佳木斯大学康复医学院黑龙江佳木斯154007 深圳市儿童医院康复科广东深圳518034

感觉功能障碍是脑瘫儿童普遍存在的临床问题,其中本体感觉在运动过程中对于姿势的调整,平衡协调的维持方面发挥重要作用,因此,针对脑瘫儿童进行本体感觉的评估对于未来的康复具有重要意义,但是目前关于本体感觉的研究还很缺乏,其主要应... 详细信息

感觉功能障碍是脑瘫儿童普遍存在的临床问题,其中本体感觉在运动过程中对于姿势的调整,平衡协调的维持方面发挥重要作用,因此,针对脑瘫儿童进行本体感觉的评估对于未来的康复具有重要意义,但是目前关于本体感觉的研究还很缺乏,其主要应用于脑卒中、关节损伤等成年人群体。因此本文旨在整理国内外针对脑瘫儿童特殊群体的本体感觉评估进行综述。

关键词：脑性瘫痪本体感觉评估儿童

Spectral　Characteristics　of　Atmospheric　Turbulence　Model

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Communications in Nonlinear Science and Numerical Simulation 1996年第4期1卷 25-28页

作者： guojun xin shida liu Shikou liu & Fuming LIANG (Dept. of Geophysics, Peking University, Beijing, 100871, P.R.China) Dept. of Geophysics Peking University Beijing 100871 P.R.China

ＳｐｅｃｔｒａｌＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＡｔｍｏｓｐｈｅｒｉｃＴｕｒｂｕｌｅｎｃｅＭｏｄｅｌ１１ＴｈｅｐａｐｅｒｗａｓｒｅｃｅｉｖｅｄｏｎＯｃｔ．２５，１９９６ＧｕｏｊｕｎＸＩＮＳｈｉｄａＬＩＵＳｈｉｋｏｕ... 详细信息

ＳｐｅｃｔｒａｌＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＡｔｍｏｓｐｈｅｒｉｃＴｕｒｂｕｌｅｎｃｅＭｏｄｅｌ１１ＴｈｅｐａｐｅｒｗａｓｒｅｃｅｉｖｅｄｏｎＯｃｔ．２５，１９９６ＧｕｏｊｕｎＸＩＮＳｈｉｄａＬＩＵＳｈｉｋｏｕＬＩＵ＆ＦｕｍｉｎｇＬＩＡＮＧ（Ｄ...

关键词： KdV-Burgers equation heteroclinic orbit turbulent spectrum

水土保持生态建设下的黄土高原典型流域水沙响应

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中国水土保持科学 2024年第1期22卷 21-26页

作者：赵阳张永娥王昭艳张国军辛艳刘冰魏小燕中国水利水电科学研究院北京100048 宁夏回族自治区水土保持监测总站银川750002

为探讨黄土高原多沙粗沙区流域水沙关系演变特征及其对水土流失治理的响应,以黄河中游无定河流域为研究对象,综合采用水沙关系曲线、数理统计等多种方法,系统分析1956—2019年间无定河流域水沙关系多时间尺度演变特征及其与水土流失治... 详细信息

为探讨黄土高原多沙粗沙区流域水沙关系演变特征及其对水土流失治理的响应,以黄河中游无定河流域为研究对象,综合采用水沙关系曲线、数理统计等多种方法,系统分析1956—2019年间无定河流域水沙关系多时间尺度演变特征及其与水土流失治理的协同响应。研究结果表明:1)研究时段内,无定河流域年径流及年输沙量呈锐减趋势(P<0.05),且均在1970年左右发生减少突变;2)流域水沙关系在年际和场次洪水尺度上均发生深刻变化。2010年以后,暴雨频发导致流域内侵蚀物源头供应明显增加,流域河道泥沙输送能力小幅提高;3)水土保持措施实施对流域水沙锐减影响较大。2000年前后在相似降雨条件下,单位降雨量径流量和单位降雨量输沙量较20世纪70年代减少47%和62%。水土保持措施面积增加与流域径流输沙减少呈现较好的一致性,流域水土流失治理在提高黄河多沙粗沙区流域下垫面抗侵蚀能力等方面发挥重要作用。研究结果可为科学认知区域水土流失治理成效及入黄泥沙锐减成因提供参考。

关键词：水沙关系极端暴雨土壤侵蚀治理成效黄河

High performance 1.3 μm InGaAsN superluminescent diodes

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Science China(Technological Sciences) 2009年第8期52卷 2396-2399页

作者： QU Yi LI Hui JXZhang BO BaoXue GAO xin liu guojun National Key Laboratory on High Power Semiconductor Lasers Changchun University of Science and TechnologyChangchun 130022China Department of Materials Science and Engineering National University of SingaporeSingapore

High performance 1.3 μm InGaAsN superluminescent diodes (SLDs) were fabricated with Schottky contact. The structure was grown by metal organic chemical vapor deposition (MOCVD). Output power of 3 mW was obtained in continuous wave (CW) mode at room temperature. The full width at half maximum (FWHM) of the emission spectrum was 30 nm. The devices operated up to 100°C.

关键词： InGaAsN superluminescent diodes Schottky contact

木耳多糖对犊牛血清抗氧化、免疫指标及肠道菌群的影响

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中国兽医学报 2024年第6期44卷 1290-1298页

作者：王琪茹张雨姜国均刘海燕何欣师鑫潮赵兴华河北农业大学动物医学(中兽医)学院河北保定071001 河北农业大学理学院河北保定071001

旨在探讨木耳多糖对犊牛抗氧化能力、免疫功能和肠道菌群的影响。试验选取(30±3)日龄和(55.33±1.86)kg体质量相近、健康状况良好的荷斯坦犊牛24头,随机分为2组,分别为对照组(C组)和试验组(T组),每组12个重复,每个重复1头。C组饲喂开... 详细信息

旨在探讨木耳多糖对犊牛抗氧化能力、免疫功能和肠道菌群的影响。试验选取(30±3)日龄和(55.33±1.86)kg体质量相近、健康状况良好的荷斯坦犊牛24头,随机分为2组,分别为对照组(C组)和试验组(T组),每组12个重复,每个重复1头。C组饲喂开食料和代乳粉,T组除饲喂开食料之外,再于代乳粉中添加木耳多糖10 g/头,连续添加10 d,检测血清抗氧化、免疫指标和肠道菌群。结果表明:与C组相比,T组犊牛血清SOD和GSH-Px活性显著提高(P0.05);提高了乳杆菌属和普拉梭菌属的相对丰度(P<0.05);提高了丁酸球菌的相对丰度(P<0.05);LEfSe分析结果显示,T组中有11种显著富集的标志物种,如厚壁菌门、乳杆菌属等,C组中有9种显著富集的标志物种,如变形菌门等。结果表明,木耳多糖可提高犊牛的血清抗氧化水平,增强机体免疫力,同时可以改善肠道菌群结构。

关键词：木耳多糖犊牛抗氧化免疫功能肠道菌群

The Interaction Between The Different Scale Eddies of The Turbulence

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Communications in Nonlinear Science and Numerical Simulation 1997年第4期2卷 197-201页

作者： shida L IU,Fuming L IANG,Shikuo L IU,guojun xin (Department of Geophysics,Peking University,Beijng1 0 0 871 ,China) Department of Geophysics Peking University Beijng 100871 China

The turbulence is composed from a large number of eddies of different *** the inertial range,the“2 / 3power-law”for velocity structure function and the“-5 / 3power-law”for energy spectrum were derived by Kolmogorov and were convinced as universal *** this paper,the turbulence which obeys the power-law of the auto-correlation function will be taken as a matter of the different scale Brownian motions which obeys the exponent-law of the auto- correlation function and the local self-similarity for different *** which we demonstrated that the turbulentexchange coefficient of different scale hierarchy changes quantitatively with its scale size and atmospheric stratification stability

关键词： Atmospheric turbulence

Numerical simulation for the coupling effect of local atmospheric circulations over the area of Beijing,Tianjin and Hebei Province

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Science China Earth Sciences 2009年第3期52卷 382-392页

作者： liu ShuHua liu Zhenxin LI Ju WANG YinChun MA YanJun SHENG Li liu HePing LIANG FuMing xin guojun WANG JianHua Department of Atmospheric Sciences School of PhysicsPeking UniversityBeijing 100871China Institute of Beijing Urban Meteorology China Meteorological AdministrationBeijing 100089China Institute of Shenyang Atmospheric Environment China Meteorological AdministrationShenyang 110016China Department of Physics Atmospheric Sciences&General ScienceJackson State UniversityP.O.Box 17660JacksonMS 39217-0195USA

Using the model system MM5.V3 and multi-layer grid nesting technique, we have done a multi-scale numerical simulation over the area of Beijing, Tianjin and Hebei Province to analyze the temperature and wind field there and study its local circulations. The results show a coupling effect of Urban Heat Island Circulation (UHIC), Mountain Valley Breeze (MVB) and Sea Land Breeze (SLB) occurs in this area when the synoptic system is weak. The SLB can penetrate deep into the mainland for about 200 km when it is blooming. MVB can extend to south and cover almost the whole plain area in Beijing. Both MVB and SLB are diurnal periodical; meanwhile the phase of MVB drops behind that of SLB for about six hours. As a local circulation, the UHIC weakens the two circulations above, and it also has a diurnal period. As a result, the coupling effect of circulations reveals not only different features in spring-summer period and autumn-winter period in a year but also the difference between early morn- ing to noonday and afternoon to night in a day. We noted the diffusion of contamination over the area around Beijing, and found the steady presence of a transport routine of contamination over North-China throughout the year caused by the Coupling Effect mentioned above. This find is important for studying the environment pollution in this area.

关键词： Beijing-Tianjin-Hebei Mountain Valley Breeze Sea Land Breeze urban heat island circulation numerical simulation

Regulation of RNA methylation and immune infiltration patterns by m5C regulators in head and neck squamous cell carcinoma

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BIOCELL 2023年第12期47卷 2641-2660页

作者： shida HOU TIANJUN LAN YAOCHENG YANG PEISHENG LIANG xin liu JUNJIE WANG ZHIFENG CHEN RONGSHENG ZENG ZIJING HUANG Guanghua School of Stomatology Hospital of StomatologyGuangdong Province Key Laboratory of StomatologySun Yat-sen UniversityGuangzhou510095China Department of Oral and Maxillofacial Surgery Sun Yat-sen Memorial Hospital of Sun Yat-sen UniversityGuangzhou510010China Department of Orthopedics The Second Xiangya HospitalCentral South UniversityChangsha410000China Department of Stomatology Affiliated Hospital of Hangzhou Normal UniversityHangzhou310015China Department of Stomatology Shunde HospitalSouthern Medical University(The First People’s Hospital of Shunde)Foshan528308China Hospital of Stomatology The First Affiliated Hospital of Jinan UniversityGuangzhou510632China Department of Stomatology Nanfang HospitalSouthern Medical UniversityGuangzhou510515China Department of Endodontics Stomatological HospitalSouthern Medical UniversityGuangzhou510280China

5-Methylcytosine(m5C)methylation contributes to the development and progression of various malignant *** study aimed to explore the potential role of m5C methylation regulators(m5CMRs)in head and neck squamous cell carcinoma(HNSCC).Methods:The transcription data of HNSCC samples were obtained from The Cancer Genome Atlas(TCGA)and the Gene Expression Omnibus(GEO)***,the m5C patterns in HNSCC were evaluated based on 14 ***,the m5Cscore was developed to quantify m5C patterns by using principal component analysis(PCA)*** single-cell RNA sequencing datasets and various methods were employed to assess the prognostic value and sensitivity to ***,key prognostic m5CMRs were identified using univariate COX regression analysis,and their clinical significance was validated based on the Human Protein Atlas(HPA)database and by using ***:Two distinct m5C clusters were identified.m5C cluster A is characterized by an immune-activated microenvironment and is associated with a favorable *** differences were observed in prognosis,immune infiltration,and immunotherapy response between the high-and low-m5Cscore *** in the high-m5Cscore group exhibited high TMB,which is correlated with poor *** m5Cscore of epithelial cells in HNSCC was higher than that in other *** prognostic m5CMRs,including NSUN2,DNMT3B,ALKBH1,and Y-Box Binding Protein 1(YBX1),were associated with poor ***:Our research indicates that in head and neck squamous cell carcinoma,the m5C modification profoundly affects the TME’s diversity and complexity,influencing prognosis and the success of *** m5C regulatory elements may be a new method for enhancing the efficacy of immunotherapy in HNSCC.

关键词： Head and neck squamous cell carcinoma RNA methylation 5-methylcytosine Immunotherapy