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Multi-objective optimization and evaluation of supercritical CO_(2) Brayton cycle for nuclear power generation

Nuclear Science and Techniques 2024年第2期35卷 183-209页

作者： guo-peng yu Yong-Feng Cheng Na Zhang Ping-Jian Ming Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China School of Civil Engineering and Architecture East China Jiaotong UniversityNanchang 330013China

The supercritical CO_(2) Brayton cycle is considered a promising energy conversion system for Generation IV reactors for its simple layout,compact structure,and high cycle *** models of four Brayton cycle layouts are developed in this study for different reactors to reduce the cost and increase the thermohydraulic performance of nuclear power generation to promote the commercialization of nuclear *** analysis,multi-objective optimizations,and four decision-making methods are applied to obtain each Brayton scheme’s optimal thermohydraulic and economic *** show that for the same design thermal power scale of reactors,the higher the core’s exit temperature,the better the Brayton cycle’s thermo-economic *** the four-cycle layouts,the recompression cycle(RC)has the best overall performance,followed by the simple recuperation cycle(SR)and the intercooling cycle(IC),and the worst is the reheating cycle(RH).However,RH has the lowest total cost of investment(C_(tot))of$1619.85 million,and IC has the lowest levelized cost of energy(LCOE)of 0.012$/(kWh).The nuclear Brayton cycle system’s overall performance has been improved due to *** performance of the molten salt reactor combined with the intercooling cycle(MSR-IC)scheme has the greatest improvement,with the net output power(W_(net)),thermal efficiencyη_(t),and exergy efficiency(η_(e))improved by 8.58%,8.58%,and 11.21%,*** performance of the lead-cooled fast reactor combined with the simple recuperation cycle scheme was optimized to increase C_(tot) by 27.78%.In comparison,the internal rate of return(IRR)increased by only 7.8%,which is not friendly to investors with limited *** the nuclear Brayton cycle,the molten salt reactor combined with the recompression cycle scheme should receive priority,and the gas-cooled fast reactor combined with the reheating cycle scheme should be considered carefully.

关键词： Supercritical CO_(2)Brayton cycle Nuclear power generation Thermo-economic analysis Multi-objective optimization Decision-making methods

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Influence of Surfactant-polymer Complexes on Crystallization and Aggregation of CaCO_3

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Chemical Research in Chinese Universities 2012年第4期28卷 737-742页

作者： PAN Yan guo yu-peng ZHAO Xu WANG Zi-chen College of Chemistry Jilin UniversityChangchun 130021P.R.China College of Chemistry Changehun Normal UniversityChangchun 130032P.R.China

Hollow calcium carbonate（CaCO3） microspheres with different morphologies were synthesized via the precipitation reaction of calcium chloride with sodium carbonate in the presence of different surfactant-polymer *** selected anionic surfactants were sodium dodecyl sulfonate（SDS） and sodium dodecyl benzenesulfonate（SDBS）,*** selected water-soluble polymers were polyacrylic acid（PAA） and polyvinyl pyrrolidone（PVP）.In this work,SDS-PVP ＂pearl-necklace model＂ micellar complex was formed via hydrophobic effectiveness between SDS and PVP and it served as the spherical template to generate spherical CaCO3 aggregates with hollow microspheres composed of about 500 nm irregular shaped ***-PAA complexes and SDBS-PAA complexes formed ＂core-shell model＂ aggregates with calcium ions serving as the medium to link the anionic surfactant and the ***-PAA ＂core-shell model＂ aggregates would act as templates for hollow CaCO3 microspheres consisting of 30―50nm irregular shaped ***-PAA ＂core-shell model＂ aggregates served as the spherical aggregate templates to generate spherical CaCO3 aggregates consisted of many small spherical particles which had grown *** the obtained CaCO3 hollow microspheres are calcite *** research may provide new insight into the control of morphologies of hollow CaCO3 microspheres in the presence of surfactantpolymer complexes.

关键词： Surfactant-polymer complex Calcium carbonate Hollow microsphere

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Preparation and UV-light Absorption Property of Oleic Acid Surface Modified ZnO Nanoparticles

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Chemical Research in Chinese Universities 2011年第3期27卷 500-502页

作者： KANG Jong-hun guo yu-peng CHEN yue WANG Zi-chen Pyongyang Printing Industry University Pyongyang DPRK College of Chemistry Jilin University Changehun 130021 P. R. China

Syntheses of zince oxide（ZnO） nanoparticles by direct precipitation and surface modification with oleic acid were reported. ZnO nanoparticles were characterized via X-ray diffractometry（XRD）, transmission electron microscopy（TEM）, infrared spectroscopy（IR） and UV-Vis spectroscopy. The prepared ZnO nanoparticles were nearly spherical and highly crystalline with an average size of 29 nm. In addition, high UV-light absorption properties of oleic acid surface modified ZnO nanoparticles were successfully obtained for a dispersion of ZnO nanoparticles in ethanol.

关键词： ZnO nanoparticle Oleic acid Modification UV-light absorption Dispersion

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Early prostate specific antigen decline and its velocity are independent predictive factors for outcomes of mCRPC patients treated with abiraterone acetate

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Military Medical Research 2022年第6期9卷 754-756页

作者： Jiang-Yi Wang guo-peng yu Long Li guo-Wen Lin Ding-Wei Ye Department of Urology Fudan University Shanghai Cancer Center270 Dong'an RoadShanghai 200032China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China Department of Urology Shanghai Ninth People's HospitalShanghai Jiaotong University School of MedicineShanghai 200011China

Dear Editor,Although the incidence of prostate cancer(PCa) has decreased in recent decades in Western countries, it has gradually increased in China due to the increasingly longer life expectancy and more popular west... 详细信息

关键词： Metastatic castration-resistant prostate cancer PSA decline PSA velocity Overall survival Time to PSA progression

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Accurate mirror-based camera pose estimation with explicit geometric meanings

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Science China(Technological Sciences) 2014年第12期57卷 2504-2513页

作者： LI Xin LONG Gu Can guo peng yu LIU Jin Bo ZHANG Xiao Hu yu Qi Feng College of Aerospace Science and Engineering National University of Defense Technology Hunan Key Laboratory of Videometrics and Vision Navigation

An accurate closed form solution is proposed to estimate camera pose by several mirrored reference object images acquired via a planar mirror under different unknown poses. Compared with state-of-the-art methods, our method is more accurate when there are more than three images and has explicit geometric meanings. This method also properly handles cases in which some of the mirror poses are parallel. The central idea is to minimize an error metric based on all reflections of rotation, which enables the camera rotation to be estimated directly by SVD of sum of mirrored camera rotations. After that, the camera translation is computed by solving a large system of linear equations to minimize object space collinearity error. Both synthesized data and real data experiments show the advantages of our approach.

关键词： pose estimation planar mirror reflection geometric meaning SVD

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Overexpression of the MADS-box gene SIMBP21 alters leaf morphology and affects reproductive development in tomato

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Journal of Integrative Agriculture 2021年第12期20卷 3170-3185页

作者： WANG yun-shu guo peng-yu ZHANG Jian-ling XIE Qiao-li SHEN Hui HU Zong-li CHEN guo-ping Laboratory of Molecular Biology of Tomato Bioengineering CollegeChongqing UniversityChongqing 400044P.R.China

Fruit yield is the most important horticultural trait of ***21,a SEPALLATA subclass MADS-box gene has been reported to have functions in regulating pedicel abscission zone identity and development and controlling sepal size in ***,we generated transgenic tomato plants which overexpress SIMBP21 and found the transformants displayed curly leaves,abnormally shaped flowers with twisted and opened stamens,reduced yield parameters,and small and light *** studies on the gain-of-function phenotype and gene expression level showed that its novel aspects played important roles in determining leaf morphology,flower and inflorescence architecture,and seed size,as well as the fruit *** of SIMBP21 in tomato resulted in curly leaves with fewer leaflets due to the regulation of the critical leaf polarity genes that cause an imbalance between the midvein adaxial-abaxial cell *** in the architecture of flowers and inflorescences resulted in reduced fruit ***,we demonstrated that SIMBP21 plays its role through inhibiting the expression of the genes involved in the determination of seed development in tomato and SIMBP21 protein can interact with other MADS-box protein(SIAGL11,TAGL1 and SIMBP3)to control seed ***,these results suggest that overexpression of SIMBP21 causes multiple types of damage to plant growth and development,especially fruit yield,in tomato.

关键词： overexpression of SIMBP21 curly leaf fruit yield seed size

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Trehalose and trehalose-hydrolyzing enzyme in the haemolymph of Locusta rnigratoria infected with Metarhizium anisopliae strain CQMa102

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Insect Science 2007年第4期14卷 277-282页

作者： HUA ZHAO ZHONG-KANG WANG YOU-PING YIN YAN-LING LI ZHEN-LUN LI guo-XIONG peng yu-XIAN XIA GeneticEngineeringResearchCenter CollegeofBioengineeringChongqingUniversityChongqingChina

Topical application of the Metarhizium anisopliae var. acridum specialist strain CQMa 102 to the locust Locusta migratoria manilensis results in changes of the concentrations of trehalose and glucose in the haemolymph. Micrographs of the locust haemolymph shows Metarhizium anisopliae can effectivly penetrate the external skeleton of locust and after 2 days infection, the hyphae body will appear in the haemolymph of infected insects. The time in decrease of trehalose concentration coincided with that in increase of trehalose-hydrolysing enzyme activity in the haemolymph of the fungus-infected insects. Overlay gel analysis indicated there was considerably more trehalose-hydrolysing activity in the haemolymph of locusts infected by fungus than in controls. A comparable isoform was identified in in vitro culture of the fungus, suggesting a fungal origin for the in vivo enzyme. Haemolymph trehalose decreased significantly during mycosis of locusts by M. anisopliae. All these results suggested that this fungus may take advantage of competing nutrient utilization against the insect by its trehalose-hydrolyzing enzyme secretion. It may provide fundamental knowledge for fungal pathogenesis.

关键词： Metarhizium anisopliae Locusta migratoria manilensis trehalose-hydrolysingenzymes trehalose glucose mycosis

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植物光呼吸途径研究进展

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草业学报 2014年第4期23卷 322-329页

作者：郭玉朋青海民族大学化学与生命科学院青海西宁810007

光呼吸是和光合作用密切相关的一个过程,它起始于光合作用碳固定阶段的第1个酶,1,5-二磷酸核酮糖(RuBP)羧化/加氧酶的加氧反应。RuBP加氧生成2-磷酸乙醇酸,这是一种对光合作用有抑制作用的物质,通过光呼吸可以转化成3-磷酸甘油酸(3-PGA)... 详细信息

光呼吸是和光合作用密切相关的一个过程,它起始于光合作用碳固定阶段的第1个酶,1,5-二磷酸核酮糖(RuBP)羧化/加氧酶的加氧反应。RuBP加氧生成2-磷酸乙醇酸,这是一种对光合作用有抑制作用的物质,通过光呼吸可以转化成3-磷酸甘油酸(3-PGA),作为卡尔文循环的底物被利用。由于这一过程释放CO2及NH3,消耗还原力NADPH和能量ATP,因此被认为是不利于光合作用的一个浪费能量的过程。但光呼吸也有其有利的一面。在强光下,光呼吸可以通过调节电子传递、消耗能量等方式,减轻由于光能过剩造成的光抑制及光氧化对光合机构的伤害。对光呼吸途径基因的克隆,有助于更好地了解光呼吸的生理功能,并通过对基因的修饰,达到调控光呼吸的目的,使作物增产。在这里,本文就关于光呼吸的途径、生理功能、基因克隆及光呼吸调控几个方面的内容做了综述。

关键词：光呼吸途径生理功能基因克隆

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钛酸盐纳米管薄膜的合成、结构与性质

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高等学校化学学报 2012年第11期33卷 2361-2367页

作者：潘琰郭飞君郭玉鹏吉林大学化学学院长春130012 长春师范学院化学学院长春130032

在水热条件下,控制反应温度和氢氧化钠的浓度,分别采用去离子水和盐酸进行洗涤处理,在钛金属基底表面合成出含钠元素和不含钠元素的两种钛酸盐纳米管薄膜(TiNTW和TiNTA),并利用X射线衍射分析、扫描电子显微镜、透射电子显微镜和能量色散... 详细信息

在水热条件下,控制反应温度和氢氧化钠的浓度,分别采用去离子水和盐酸进行洗涤处理,在钛金属基底表面合成出含钠元素和不含钠元素的两种钛酸盐纳米管薄膜(TiNTW和TiNTA),并利用X射线衍射分析、扫描电子显微镜、透射电子显微镜和能量色散X射线光谱等对其结构、组成和性质进行了表征.结果表明,TiNTW和TiNTA均由宽约8 nm、长约1μm的纳米管组成,但TiNTA表现出较好的光催化活性和储氢性能,而热稳定性弱于TiNTW,二者在性质上的显著区别归因于2种钛酸盐纳米管薄膜的晶体结构和元素组成的不同.

关键词：钛酸盐纳米管热稳定性光催化活性储氢性能

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基于航空器自主运行的空中交通复杂性建模

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交通运输系统工程与信息 2022年第2期22卷 305-312,321页

作者：王红勇郭宇鹏中国民航大学空中交通管理学院天津300300

针对航空器自主运行模式的空中交通运行态势评估问题,本文重构了基于分布式空中交通管理系统的空中交通复杂性评价方法,并仿真验证了该方法在航空器冲突探测和自主航迹规划中的应用。首先,基于自由航路空域和航空器自主运行模式定义了... 详细信息

针对航空器自主运行模式的空中交通运行态势评估问题,本文重构了基于分布式空中交通管理系统的空中交通复杂性评价方法,并仿真验证了该方法在航空器冲突探测和自主航迹规划中的应用。首先,基于自由航路空域和航空器自主运行模式定义了空中交通复杂性,在通过三维空域栅格模型量化航空器时空位置的基础上,构建复杂度计算模型以反映航空器位置、航向、航速对空域各栅格的实时复杂性影响;其次,基于实际管制扇区(ZSSSAR01)及高度层,分别模拟自由航路与固定航路运行模式,对比两者空中交通复杂度时空分布差异;并结合自由航路运行模式,在空中交通复杂性与航空器冲突指标(冲突率、冲突比例)相关性分析的基础上,研究空域复杂度阈值确定方法;最后,初步探究基于空域复杂度阈值进行航空器自主航迹调整的方法,评估其运行效果。仿真实验结果表明:自由航路运行模式相对固定航路运行模式可显著降低空域最大复杂度值(平均降幅119%);模型计算得到,空中交通复杂度与空域中航空器冲突指标有强相关性(相关系数大于0.90);基于复杂度和复杂度阈值的航迹调整策略具备一定可行性。

关键词：航空运输空中交通复杂性自由航路空域航空器自主保持间隔运行空中交通管理

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