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Developments on CO_(2)-utilization technologies

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Clean Energy 2019年第2期3卷 85-100页

作者： qian zhu The IEA Clean Coal Centre 176 Upper Richmond RdLondonSW152SHUK

As an additional CO_(2)-mitigation strategy to carbon capture and storage,CO_(2)capture and utilization(CCU)is attracting increasing interest *** potential applications of CCU are diverse,ranging from using CO_(2)in greenhouses and farming to conversion of CO_(2)into fuels,chemicals,polymers and building ***_(2)has already been used for decades with mature technologies in various industrial processes such as CO_(2)-enhanced oil recovery,the food and beverage industry,urea production,water treatment and the production of fire retardants and *** are also many new CO_(2)-utilization technologies at various stages of development and *** technologies have the potential to provide opportunities for emission savings for power and other industrial sectors by partially substituting fossil-fuel raw materials,increasing efficiency and using renewable energy,and generating revenues through producing marketable *** paper investigates the CO_(2)-utilization technologies that convert CO_(2)into commercial products via chemical and biochemical reactions with a focus on front-running technologies that are at,or close to,large-scale demonstration or *** CO_(2)-utilization technologies are grouped according to the technological routes used,such as electrochemical,photocatalytic and photosynthetic,catalytic,biological process(using microbes and enzymes),copolymerization and *** developments and the status of the CO_(2)-utilization technologies are *** environmental impact of CCU is also discussed in terms of life-cycle analysis.

关键词： CCUS CO_(2)conversion CO_(2)utilization CO_(2)to fuels CO_(2)to chemicals CO_(2)mineralization carbon capture energy chemistry and catalysis

Innovative power generation systems using supercritical CO_(2) cycles

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Clean Energy 2017年第1期1卷 68-79页

作者： qian zhu The IEA Clean Coal Centre 176 Upper Richmond RdLondon SW152SHUK

Supercritical carbon dioxide(sCO_(2))power cycle is an innovative concept for converting thermal energy to electrical *** uses sCO_(2)as the working fluid medium in a closed or semi-closed Brayton thermodynamic *** sCO_(2)power cycles have several benefits such as high cycle efficiency,small equipment size and plant footprint(and therefore lower capital cost)and the potential for full carbon *** the full benefits of the sCO_(2)cycle depends on overcoming a number of engineering and materials science challenges that impact both the technical feasibility of the cycle and its economic *** example,the design and construction methods of turbomachinery,recuperator and high-pressure oxy-combustor pose significant technical *** R&D needs include material selection and testing,and optimized power cycle *** the years,particularly in the last decade,R&D efforts have been growing worldwide to develop sCO_(2)cycle technologies for power *** progress has been made in developing sCO_(2)cycle power *** small,low-temperature sCO_(2)Brayton cycle power systems are starting to emerge in the commercial market,and a natural gas-fired demonstration power plant using a sCO_(2)cycle called the Allam Cycle is under *** article describes the sCO_(2)cycles for applications in power generation from fossil fuels and reviews the recent developments in sCO_(2)power cycle technologies.

关键词： supercritical CO_(2)cycle Brayton cycle power generation energy efficiency CO_(2)capture

Deciphering cotton genomic variations for"genes to jeans"

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Molecular Plant 2023年第4期16卷 654-656页

作者： qian-Hao zhu CSIRO Agriculture and Food GPO Box 1700CanberraACT 2601Australia

Genomic variation includes inter-and intraspecific *** former is the genetic footprint of species speciation and *** latter is the within-species variation caused by spontaneous mutation that has been maintained through natural and artificial *** interspecific genomic variations of a crop helps us to understand its genetic diversity and evolution *** intraspecific genomic variations and linking them to phenotypic outcomes sheds light on how natural and artificial selection has shaped the crop and provides targets for improving its performance through molecular breeding technologies.

关键词： breeding artificial linking

Analysis of prompt supercritical process with heat transfer and temperature feedback

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Nuclear Science and Techniques 2009年第5期20卷 317-320页

作者： zhu Bo zhu qian CHEN Zhiyun School of Nuclear Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Nuclear Science and Engineering Naval University of Engineering Wuhan 430033 China

The prompt supercritical process of a nuclear reactor with temperature feedback and initial power as well as heat transfer with a big step reactivity (ρ0>β) is analyzed in this paper. Considering the effect of heat transfer on temperature of the reactor, a new model is set up. For any initial power, the variations of output power and reactivity with time are obtained by numerical method. The effects of the big inserted step reactivity and initial power on the prompt supercritical process are analyzed and discussed. It was found that the effect of heat transfer on the output power and reactivity can be neglected under any initial power, and the output power obtained by the adiabatic model is basically in accordance with that by the model of this paper, and the analytical solution can be adopted. The results provide a theoretical base for safety analysis and operation management of a power reactor.

关键词：超临界温度反应核技术核反应堆

CCL2/CCR2 Contributes to the Altered Excitatory-inhibitory Synaptic Balance in the Nucleus Accumbens Shell Following Peripheral Nerve Injury-induced Neuropathic Pain

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Neuroscience Bulletin 2021年第7期37卷 921-933页

作者： Xiao-Bo Wu qian zhu Yong-Jing Gao Institute of Pain Medicine and Special Environmental Medicine Nantong UniversityNantong 226019China Co-innovation Center of Neuroregeneration Nantong UniversityNantong 226001China

The medium spiny neurons(MSNs)in the nucleus accumbens(NAc)integrate excitatory and inhibitory synaptic inputs and gate motivational and emotional behavior *** we report that the relative intensity of excitatory and inhibitory synaptic inputs to MSNs of the NAc shell was decreased in mice with neuropathic pain induced by spinal nerve ligation(SNL).SNL increased the frequency,but not the amplitude of spontaneous inhibitory postsynaptic currents(sIPSCs),and decreased both the frequency and amplitude of spontaneous excitatory postsynaptic currents(sEPSCs)in the *** also decreased the paired-pulse ratio(PPR)of evoked IPSCs but increased the PPR of evoked ***,acute bath application of C–C motif chemokine ligand 2(CCL2)increased the frequency and amplitude of sIPSCs and sEPSCs in the MSNs,and especially strengthened the amplitude of N-methyl-D-aspartate receptor(NMDAR)-mediated miniature *** Ccl2 overexpression in the NAc in vivo decreased the peak amplitude of the sEPSC/sIPSC ***,Ccr2 knock-down improved the impaired induction of NMDAR-dependent long-term depression(LTD)in the NAc after *** results suggest that CCL2/CCR2 signaling plays a role in the integration of excitatory/inhibitory synaptic transmission and leads to an increase of the LTD induction threshold at the synapses of MSNs during neuropathic pain.

关键词： E/I balance Synaptic transmission LTD CCL2 CCR2 Nucleus accumbens Neuropathic pain

New-onset diabetes secondary to acute pancreatitis:An update

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World Journal of Clinical Cases 2022年第30期10卷 10862-10866页

作者： Xian-qiang Yu qian zhu Department of General Surgery Women's and Children’s Hospital Affiliated to Qingdao UniversityQingdao 266034Shandong ProvinceChina Department of Hepatobiliary and Pancreatic Surgery Zhongnan Hospital of Wuhan UniversityWuhan 430071Hubei ProvinceChina

Diabetes is a condition of persistent hyperglycemia caused by the endocrine disorder of the ***,all pancreatic diseases have the risk of *** particular,increasing attention has been paid recently to new-onset diabetes secondary to acute pancreatitis(AP).The complications of secondary diabetes have caused a lot of trouble for patients and have garnered increasing *** present,the pathophysiological mechanism of new-onset diabetes caused by AP is not *** review summarizes the current understanding of new-onset diabetes secondary to AP.

关键词： Acute pancreatitis New-onset diabetes β-cell Hyperglycemia

Reconstructed index of summer monsoon dry-wet modes in East Asia for the last millennium

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Chinese Science Bulletin 2011年第28期56卷 3019-3027页

作者： qian WeiHong zhu YaFen TANG ShuaiQi Monsoon and Environment Research Group School of Physics Peking University Beijing 100871 China

Monthly precipitation datasets collected at 160 stations in China as well as the monthly winds and humidity data derived from the US National Centers for Environmental Prediction (NCEP) were used to construct the relationship between six summer dry-wet modes in eastern China and the summer monsoon airflow northward advance in East Asia. A millennial series of the monsoon dry-wet index (MDWI) was reconstructed based on Wang's six summer dry-wet modes in eastern China since 950 AD. A high (low) index indicates that the strong (weak) East Asian summer monsoon airflow can reach northern (southern) China and cause above (below) normal precipitation. Interdecadal periodic variations, such as the approximate 70-year oscillation, can be found in the MDWI series. In the last millennium, northern China has experienced persistent decadal wet periods and persistent decadal dry periods. At present, the MDWI is a low period on the interdecadal time scale so above-normal precipitation is observed in southern China and below-normal precipitation in northern China.

关键词：夏季季风干湿指数东亚中国北方地区月降水量中国模式重构中国东部地区

Significantly Improved Stereocomplexation Ability in Cyclic Block Copolymers

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Chinese Journal of Polymer Science 2023年第3期41卷 432-441,I0009页

作者： qian zhu Zhi-Ping Zhou Tong-Fan Hao Yi-Jing Nie Research School of Polymeric Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013China

Stereocomplex crystallization in cyclic polymer blend and cyclic block copolymers was investigated by means of dynamic Monte Carlo *** polymer systems(linear polymer blend,linear diblock copolymer,cyclic polymer blend,cyclic diblock copolymer and tetrablock copolymer)were *** was interestingly found that the cyclic polymer blend exhibited the weakest stereocomplexation ability,while the two cyclic block copolymers showed stronger stereocomplexation ability than the linear diblock *** abnormal improved stereocomplexation ability of the cyclic block copolymers can be attributed to the synergy between the ring chain topology and the block copolymer *** with the linear block copolymers,the ring chain topology confined segmental motions of cyclic polymer chains to smaller regions,and then the segments belonging to the different blocks in the cyclic block copolymers have more chance to contact with each *** this way,the cyclic block copolymers had better miscibility between segments belonging to different types of blocks,leading to the stronger stereocomplexation ability.

关键词： Monte Carlo simulation Stereocomplex crystallization Ring chain topology Cyclic block copolymers

Soliton pulse compression through cascaded quadratic nonlinearity in difference-frequency generation

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Chinese Science Bulletin 2008年第13期53卷 1941-1945页

作者： WANG Ke qian LieJia zhu HeYuan State Key Laboratory for Advanced Materials and Devices Department of Optical Science and Engineering Fudan University Shanghai 200433 China

Cascaded nonlinearity based soliton pulse compression in the process of femtosecond difference frequency generation is studied theoretically. A set of simplified coupled wave equations under the conditions of large phase mismatch and matched group velocities is obtained,which reveals the physical mechanism of soliton compression in this process. Numerical simulations demonstrate that in the presence of group velocity dispersion and equivalent cross phase modulation,both the pump and the signal pulses can be compressed with a high compression ratio.

关键词：孤立子压缩频率产生非线性叶栅当量相位