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Journal of Environmental Sciences 2002年第4期14卷 474-481页

作者： lixiao-ming ZENGGuang-ming LIUJlng-jln CHENJian LUNShi-yi DepartmentofEnvironmentalScienceandEngineering HunanUniversityChangsha410082China SchoolofBiotechnology WuxiUniversityofLightIndustryWuxi214036China

The high strength easily biodegradable pollutants (represented by COD E) are strong inhibitors of terephthalic acid (TA) anaerobic biodegradation. At the same time, TA can inhibit easily biodegradable pollutants removal under anaerobic conditions to a limited extent. This mutual inhibition could happen and cause a low removal efficiency of both TA and COD E, when the effluent from TA workshops containing TA and easily biodegradable pollutants are treated by a single anaerobic reactor system. Based upon the treatment kinetics analysis of both TA degradation and COD E removal, a two stage up flow anaerobic sludge blanket and up flow fixed film reactor(UASB UAFF) system for dealing with this kind of wastewater was developed and run successfully at laboratory scale. An UASB reactor with the methanogenic consortium as the first stage removes the easily biodegradable pollutants(COD E). An UAFF reactor as the second stage is mainly in charge of TA degradation. At a COD E loading of 15.3 g/(L\5d) and a TA loading of 1.4 g/(L\5d), HRT 18.5h, the COD E and TA removal rate of the system reached 89.2% and 71.6%, respectively.

关键词： wastewater treatment anaerobic system kinetics terephthalic acid(TA) inhibition

Mockup tests for developing the CARR-CNS with a two-phase thermo-siphon loop

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Nuclear Science and Techniques 2004年第6期15卷 375-380页

作者： DUShe-Jiao BIQin-Cheng CHENTing-Kuan FENGQuan-Ke lixiao-ming StateKeyLaboratoryofMultiphaseFlowinPowerEagiaeeriag Xi＇anJiaotoagUniversityXi＇an710049 StateKeyLaboratoryofMultiphaseFlowinPowerEagiaeeriag Xi＇anJiaotoagUniversityXi＇an710049

The cold neutron source (CNS) is a facility to increase cold neutrons by scattering thermal neutrons in liquid hydrogen or deuterium around 20 K. For extracting a stable cold neutron flux from the CNS, the liquid quantity in the moderator cell should be maintained stably against disturbance of nuclear heating. The China Institute of Atomic Energy (CIAE) is now constructing the China Advanced Research Reactor (CARR: 60 MW), and designing the CARR-CNS with a two-phase thermo-siphon loop consisting of a condenser, two moderator transfer tubes and an annular cylindrical moderator cell. The mock-up tests were carried out using a full-scale loop with Freon-113, for validating the self-regulating characteristics of the loop, the void fraction less than 20% in the liquid hydrogen of the moderator cell, and the requirements for establishing the condition under which the inner shell has only vapor. The density ratio of liquid to vapor and the volumetric evaporation rate due to heat load are kept the same as those in normal operation of the CARR-CNS. The results show that the loop has the self-regulating characteristics and the in- ner shell contains only vapor, while the outer shell liquid. The local void fraction in the liquid increases with increas- ing of the loop pressure.

关键词： CARR 空隙组分自动调节热虹吸管环柱面慢化剂单元核物理

Activation of Proteinkinase ERK Mediates Induction of Macrophage MMP-12 by OxLDL

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Wuhan University Journal of Natural Sciences 2004年第1期9卷 120-124页

作者： HeChun-yan ZhouXin lixiao-ming YuHong HongJia-ling ZhongnanHospital SchoolofMedicineWuhanUniversityWuhan430071HubeiChina DepartmentofBiochemistryandMolecularBiology SchoolofMedicineWuhanUniversityWuhan430071HubeiChina DepartmentofBiochemistryandMolecularBiology SchoolofMedicineWuhanUniversityWuhan430071HubeiChina

The present study was undertaken to investigate the effect of oxidized low density lipoprotein (oxLDL) on the expression of macrophage matrix metalloproteinase-12 (MMP-12), and the possible mechanisms. Activation of extracellular signal-regulated kinase 1/2 (ERK1/2) was detected by Western blot Analysis. Enzymatic activity of MMP-12 was determined by β-casein zymography. RT-PCR analysis was used to measure the mRNA expression level of MMP-12. OxLDL-stimulated macrophages produced increased casein-degrading activities and oxLDL also significantly increased the mRNA level of MMP-12 in a dose-dependent manner. OxLDL stimulated the phosphorylation of ERK1/2 in macrophages. The use of the specific inhibitor indicated that the ERK1/2 signaling pathway was required for the induction of MMP-12. These data demonstrated that oxLDL induced MMP-12 expression in macrophages through an ERK1/2-dependent pathway. Key words oxidized low density lipoproteins - macrophage - matrix metalloproteinases CLC number Q 556+.9 Foundation item: Supported by the Natural Science Foundation of Hubei Province (99J138)Biography: He Chun-yan (1970-), female, Ph. D candidate, research direction: biochemistry diagnosis of atherosclerosis.

关键词： oxidized low density lipoproteins macrophage matrix metalloproteinases

Influences of physical properties of two-phase mixture on void fraction in an annular vessel

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Nuclear Science and Techniques 2004年第4期15卷 243-247页

作者： lixiao-ming BIQin-Cheng FENGQuan-Ke CHENTing-Kuan DUShe-Jiao SchoolofEnergyandPowerEngineeringXi′anJiaotongUniversityXi′an710049 TheStateKeyLaboratoryofMultiphaseFlowinPowerEngineering Xi′anJiaotongUniversityXi′an710049

To keep the void fraction of two-phase hydrogen in the moderator cell of the cold neutron source (CNS)of China Advanced Research Reactor (CARR) to a specified range, an annular vessel with the same size as the actual moderator cell was used as test section. Deionized water and alcohol, sucrose, and sodium chloride solutions with different concentrations were used as working fluid to find out influences of physical properties, such as density, viscosity and surface tension, of the two-phase mixture on void fraction. The tests proved that the ratio of surface tension to density of liquid phase has great influence on void fraction: the larger the ratio, the smaller the void *** the ratio of surface tension to density of Freon 113 is lower than that of liquid hydrogen, Freon 113 can be used as a working fluid to study the void fraction in the two-phase hydrogen thermosiphon loop in the CNS of CARR and the results will be conservative.

关键词：双相流表面张力密度中子源环形导管

Model-based evaluation on the conversion ratio of ammonium to nitrite in a nitritation process for ammonium-rich wastewater treatment

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Journal of Environmental Sciences 2004年第6期16卷 1005-1010页

作者： lixiao-ming YANGQi ZENGGuang-ming A.Cornelius K.H.Rosenwinkel S.Kunst D.Weichgrebe DepartmentofEnvironmentalScienceandEngineering HunanUniversityChangsha410082China InstituteofWaterQualityandWasteManagement HannoverUniversityWelfengartenD-130167HannoverGermany

Modeling for nitritation process was discussed and analyzed quantitatively for the factors that influence nitrite accumulation. The results indicated that pH, inorganic carbon source and Hydraulic Retention Time(HRT) as well as biomass concentration are the main factors that influenced the conversion ratio of ammonium to nitrite. A constant high pH can lead to a high nitritation rate and results in high conversion ratio on condition that free ammonia inhibition do not happen. In a CSTR system, without pH control, this conversion ratio can be monitored by pH variation in the reactor. The pH goes down far from the inlet level means a strongly nitrite accumulation. High concentration of alkalinity can promoted the conversion ratio by means of accelerating the nitritation rate through providing sufficient inorganic carbon source(carbon dioxide). When inorganic carbon source was depleted, the nitritation process stopped. HRT adjustment could be an efficient way to make the nitritation system run more flexible, which to some extent can meet the requirements of the fluctuant of inlet parameters such as ammonium concentration, pH, and temperature and so on. Biomass concentration is the key point, especially for a CSTR system in steady state, which was normally circumscribed by the characteristics of bacteria and may also affected by aeration mode and can be increased by prolonging the HRT on the condition of no nitrate accumulation when no recirculation available. The higher the biomass concentration is, the better the nitrite accumulation can be obtained.

关键词： conversion ratio modeling analysis nitritation process nitrite accumulation

Synthesis of serotonin transporter imaging agent [^(125)I]ADAM

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Nuclear Science and Techniques 2005年第3期16卷 153-155页

作者： LUChun-Xiong WUChun-Ying JIANGQuan-Fu CHENZheng-Ping ZHANGTong-Xing lixiao-ming WANGSong-Pei JiangsuInstituteofNuclearMedicine Wuxi214063

The synthesis of serotonin transporter imaging agent [125I] -2-((2-((dimethylamino)methyl)phenyl) thio)-5-iodophenylamine([125I] ADAM) was reported. The chemical structure of the labeling precursor 5- (tributyl- stannyl) -2-((2-((dimethylamino)methyl)phenyl)thio)phenylamine and all its intermediates were verified by IR,1HNMR and MS. The radioiodinated compound was prepared using iododestannylation reaction by hydrogen peroxide. Final radiochemical purity was above 95% determined by TLC.

关键词：复合胺传输成象介质 TLC 合成工艺放射医学

Crop Yield,N Uptake and Nitrates in a Fluvo-Aquic Soil Profile

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Pedosphere 2004年第1期14卷 131-136页

作者： ZHANGShu-Xiang LIXiu-Ying lixiao-Ping YUANFeng-ming YAOZhao-Hua SUNYong-Lin ZHANGFu-Dao InstituteofSoilsandFertilizers ChineseAcademyofAgriculturalSciencesBeijing100081（China）

The effects of different chemical fertilizer combinations (N, P and K) oncrop yield, N uptake and nitrate distribution and accumulation to a depth of 100 cm were studied ina cinnamon fluvo-aquic soil profile (Beijing) with a continuous winter wheat-summer maize croppingsystem for nine years. The experiment consisted of 7 treatments: no fertilizer control (CK); Nalone, N in combination with K (NK), P (NP), and P and K (NPK and N1PK); and P and K in combinationwithout N (PK). The rate of N was 150 kg ha^(-1) for the N treatments except Treatment N1PK withhigher N rate (195 kg ha^(-1)), and the rates of P (P_2O_5) and K (K2O) were 75 and 37.5 kg ha^(-1),respectively. The applications of N combined with P and K (NK, NP and NPK) resulted in higher cropyields than a single application of N. The yields followed the order: NPK > NP > N1PK > PK > NK > N> CK for winter wheat, and NPK > N1PK > NP > NK > N > PK > CK for summer maize. Supplement of N withP or K, or both P and K resulted in a higher average N uptake of the two crops, which was in adecreasing order NPK > NP > N1PK > NK > N > PK > CK. The combinations also increased apparent Nrecovery more than N alone and CK. The nitrate content in the profile was thus reduced more in thecombination treatments. The nitrate accumulation in the soil profiles followed the order: N > NK >N1PK > NPK > NP > CK > PK. Higher N uptake by the adequately fertilized crops (Treatment NPK)reduced nitrate accumulation in the profile and thus reduced nitrate leaching. The optimum N:P:Kratio was thus of paramount importance in increasing yields and N uptake of crops and reducingnitrate leaching losses.

关键词： fertilizer combination N uptake nitrate distribution and accumulation yield

Airborne space laser communication system and Experiments

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Airborne space laser communication system and Experiments

国防光电子论坛空间光信息与组网技术及应用研讨会

作者： lixiao-ming ZHANGLi-zhong MENGLi-xin National and Local Joint Engineering Research Center of Space Optoelectronics Technology of CUST School of photoelectric engineering Changchun University of science and technology

Airborne space laser communication is characterized by its high speed, anti-electromagnetic interference, security, easy to assign. It has broad application in the areas of integrated space-ground communication networking, military communication, anti-electromagnetic communication. This paper introduce the component and APT system of the airborne laser communication system design by Changchun university of science and technology base on characteristic of airborne laser communication and Y12 plan, especially introduce the high communication speed and long distance communication experiment of the system that among two Y12 plans. In the experiment got the aim that the max communication distance 144 Km, error 97%, average capture time 20 s. The experiment proving the adaptability of the APT and the high speed long distance communication.

关键词： laser communication plan platform APT

来源： cnki会议评论

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重视甲状腺癌手术治疗的规范化

中华耳鼻咽喉头颈外科杂志 2009年第4期44卷 265-267页

作者：李晓明白求恩国际和平医院耳鼻咽喉头颈外科石家庄050082

甲状腺手术的历史最早可以追溯到公元1000年，有资料记载Albucasis当时曾成功地切除过甲状腺肿，但文献记载第一例有完整记录的甲状腺手术完成于1595年。1872年，瑞士的Kocher完成了第一例甲状腺切除术，到1901年Kocher共完成2000例甲... 详细信息

甲状腺手术的历史最早可以追溯到公元1000年，有资料记载Albucasis当时曾成功地切除过甲状腺肿，但文献记载第一例有完整记录的甲状腺手术完成于1595年。1872年，瑞士的Kocher完成了第一例甲状腺切除术，到1901年Kocher共完成2000例甲状腺手术。鉴于他在甲状腺手术和生理学研究方面的杰出贡献，1909年Kocher获得了诺贝尔医学奖。从那时起，甲状腺疾病的外科治疗逐渐兴起，经过100年的不断发展，甲状腺手术已取得重大进展。时至今日，外科医生可以通过不同的手术方式成功地对各种甲状腺肿瘤进行手术切除。

关键词：手术治疗甲状腺癌 Kocher 甲状腺手术甲状腺肿瘤甲状腺切除术诺贝尔医学奖甲状腺疾病

基于Neo4j的海量石油领域本体数据存储研究

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计算机科学 2018年第B6期45卷 549-554页

作者：宫法明李翛然中国石油大学(华东)计算机与通信工程学院山东青岛266580

语义网技术的发展促进了石油领域中多学科本体之间的整合技术的发展。随着数据的规模的增大,传统的基于关系型数据库的数据存储和信息检索等存在较多问题。对此,提出了一个基于Neo4j数据库的领域本体构建过程,专注于改进数据存储和信息... 详细信息

语义网技术的发展促进了石油领域中多学科本体之间的整合技术的发展。随着数据的规模的增大,传统的基于关系型数据库的数据存储和信息检索等存在较多问题。对此,提出了一个基于Neo4j数据库的领域本体构建过程,专注于改进数据存储和信息检索两个方面。首先,提出了一种基于图形数据库Neo4j的大规模本体数据存储问题的解决方案,通过设计一种基于Neo4j的存储模型配合分布式存储机制,实现存储空间的高效利用。其次,在Neo4j数据模型的基础上,设计了一种两层索引结构的检索算法。实验评估表明,提出的方法与基于关系数据库的方法相比,在数据存储方面可以节省10%以上的存储空间,在信息检索方面将检索效率提高了30多倍。

关键词：石油领域本体 RDF数据 Neo4j数据库大数据存储运动目标判断