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| 1 | Geochemical characteristics of natural gas from mud volcanoes in the southern Junggar Basin显示文摘A number of mud volcanoes exist in the southern Junggar Basin. To date few systematic studies on natural gas geochemistry of mud volcanoes have been conducted in China. In June 1991 and August 2010, the authors investigated the mud volcanoes in the southern Junggar Basin twice, and the mud volcanism weakened gradually as seen from the variations such as the decrease of gas pressure and output, the downthrow and dry up of the mud pool. The volcanic intensity was significantly weaker than that in Taiwan. The natural gas from the mud volcanoes in the southern Junggar Basin has similar geochemical characteristics, indicating the same source or origin. The main component of the mud volcano gas is alkane gas with contents of 91.15%-97.49%, and the gas is high-quality commercial gas since methane dominates in the alkane. The 13C1 values are 49.1‰--40.6‰, which are in accordance with the peak 13C1 frequency of mud volcano gas around the world, and the alkane gas displays positive carbon isotopic series, i.e., 13C1< 13C2< 13C3, suggesting typical thermogenic origin. The helium in the mud volcano gas is typically crust-derived due to the low R/Ra values of 0.011-0.054. The mud volcano gas is coal-derived since the 13C2 values are all greater than 28‰, and C1/C1-4 and 13C1 values are in accordance with those of natural gas derived from the Lower-Middle Jurassic coal-measures. Therefore, alkane gas from mud volcanoes in the southern Junggar Basin is mainly sourced from the Lower-Middle Jurassic coal-measures. | DAI JinXing WU XiaoQi NI YunYan WANG ZeCheng ZHAO ChangYi WANG ZhaoYun LIU GuiXia | 2012 | Science China Earth Sciences2012，55，3： | 13 |
| 2 | Identification of marine natural gases with different origin sources显示文摘Kinetic experiments of gas generation for typical samples of marine gas precursors including low-maturity kerogen,residual kerogen and oil as well as dispersed liquid hydrocarbon(DLH)in source rocks were performed by closed system,and the evolution trends of molecular and isotopic compositions of natural gases from different precursors against the maturity(R0%)at laboratory conditions were analyzed.Several diagrams of gas origin were calibrated by using the experimental data.A diagram based on the ratio of normal and isomerous butane and pentane(i/nC4-i/nC5)was proposed and used to identify the origins of the typical marine natural gases in the Sichuan Basin and the Tarim Basin, China.And the maturities of natural gases were estimated by using the statistical relationships between the gaseous molecular carbon isotopic data and maturities(δ13C-R 0 %)with different origins.The results indicate that the molecular and isotopic compositions of simulated gases from different precursors are different from each other.For example,the dryness index of the oil-cracking gas is the lowest;the dryness indices of gases from DLH and kerogen in closed system are almost the same;and the dryness index of gases from residual kerogen is extremely high,indicating that the kerogen gases are very dry;the contents of non-hydrocarbon gases in kerogen-cracking gases are far higher than those in oil-cracking and DLH-cracking gases.The molecular carbon isotopes of oil-cracking gases are the lightest,those of kerogen in closed system and GLH-cracking gases are the second lightest,and those of cracking gases from residual kerogen are the heaviest.The calibration results indicate that the diagrams of ln(C1/C2)-ln(C2/C3)andδ13C2-δ13C3-ln(C2/C3)can discriminate primary and secondary cracking gases,but cannot be used to identify gas origin sources,while the diagram of i/nC4-i/nC5 can differentiate the gases from different precursors.The application results of these diagrams show that gas mixtures extensively exist in China,which involved the gases from multiple precursors and those from different maturity stages.For example,marine gases in the Sichuan Basin involve the mixture of oil-cracking gases and high-over-maturated kerogen gases,while those in the Tarim Basin involve not only the mixture of gases from multiple precursors,but also those from different maturity gases and post-reservoir alternations such as oxidized degradation and gas intrusion processes. | WANG YunPeng 1 ,ZHAO ChangYi 2 ,WANG ZhaoYun 2 ,WANG HongJun 2 ,TIAN Jin 1 ,ZOU YanRong 1 &LIU JinZhong1 1State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China 2Institute of Geology,Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China | 2008 | Science China Earth Sciences2008，51，S1： | 4 |
| 3 | Photothermal therapy with regulated Nrf2/NF-κB signaling pathway for treating bacteria-induced periodontitis显示文摘Periodontitis is an inflammatory disease initiated by bacterial infection,developed by excessive immune response,and aggravated by high level of reactive oxygen species(ROS).Hence,herein,a versatile metal-organic framework(MOF)-based nanoplatform is prepared using mesoporous Prussian blue(MPB)nanoparticles to load BA,denoted as MPB-BA.The established MPB-BA nanoplatform serves as a shelter and reservoir for vulnerable immunomodulatory drug BA,which possesses antioxidant,anti-inflammatory and anti-bacterial effects.Thus,MPB-BA can exert its antioxidant,anti-inflammatory functions through scavenging intracellular ROS to switch macrophages from M1 to M2 phenotype so as to relieve inflammation.The underlying molecular mechanism lies in the upregulation of phosphorylated nuclear factor erythroid 2-related factor 2(Nrf2)to scavenge ROS and subsequently inhibit the nuclear factor kappa-B(NF-κB)signal pathway.Moreover,MPB-BA also exhibited efficient photothermal antibacterial activity against periodontal pathogens under near-infrared(NIR)light irradiation.In vivo RNA sequencing results revealed the high involvement of both antioxidant and anti-inflammatory pathways after MPB-BA application.Meanwhile,micro-CT and immunohistochemical staining of p-Nrf2 and p-P65 further confirmed the superior therapeutic effects of MPB-BA than minocycline hydrochloride.This work may provide an insight into the treatment of periodontitis by regulating Nrf2/NF-κB signaling pathway through photothermal bioplatform-assisted immunotherapy. | Yujuan Tian Ying Li Jialin Liu Yi Lin Jian Jiao Bo Chen Wanmeng Wang Shuilin Wu Changyi Li | 2022 | Bioactive Materials2022，7，3： | 3 |
| 4 | On the calibration and verification of Voronoi-based discontinuous deformation analysis for modeling rock fracture显示文摘Since its introduction,discontinuous deformation analysis(DDA)has been widely used in different areas of rock mechanics.By dividing large blocks into subblocks and introducing artificial joints,DDA can be applied to rock fracture simulation.However,parameter calibration,a fundamental issue in discontinuum methods,has not received enough attention in DDA.In this study,the parameter calibration of DDA for intact rock is carefully studied.To this end,a subblock DDA with Voronoi tessellation is presented first.Then,a modified contact constitutive law is introduced,in which the tensile and shear meso-strengths are modified to be independent of the bond lengths.This improvement can prevent the unjustified preferential failure of short edges.A method for imposing confining pressure is also introduced.Thereafter,sensitivity analysis is performed to investigate the influence of the calculated parameters and meso-parameters on the mechanical properties of modeled rock.Based on the sensitivity analysis,a unified calibration procedure is suggested for both cases with and without confining pressure.Finally,the calibration procedure is applied to two examples,including a biaxial compression test.The results show that the proposed Voronoi-based DDA can simulate rock fracture with and without confining pressure very well after careful parameter calibration. | Kaiyu Zhang Feng Liu Kaiwen Xia Ying Xu Peng Dong Changyi Yu | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，8： | 2 |
| 5 | Determining the Main Gas-generation Phase of Marine Organic Matters in Different Occurrence States using the Kinetic Method显示文摘摘要:这份报纸用运动方法探查海洋的器官的冰铜的主要煤气产生的阶段的决心。海洋的有机物的主要煤气产生的阶段被典型海洋的有机物的获得的运动参数计算的地质的历史上联合煤气的产生收益和率决定(水库油,剩余沥青,低成熟的 kerogen 和剩余 kerogen )在由 EasyRo (%)方法的中国和国外和成熟。这里,主要煤气产生的阶段为类型作为 Ro%=1.4%2.4% 被决定我 kerogen,为低成熟的类型 II kerogen 的 Ro%=1.53.0% ,为剩余 kerogen 的 Ro%=1.42.8% ,为剩余沥青的 Ro%=1.53.2% 和为水库油裂开的 Ro%=1.63.2% 。对从模仿的系统的坦诚和天然气产生的死了的线的主要煤气产生的阶段的影响也被讨论。结果显示模拟系统的坦诚在计算主要煤气产生的阶段上有明确的影响。类型 II kerogen 的主要煤气产生的阶段是在一个开的系统的 Ro%=1.43.1% ,它在一个封闭系统是比那早的。根据我们的结果,天然气产生的死了的线为类型作为 Ro=3.5% 被决定我 kerogen,为类型 II kerogen 的 Ro=4.44.5% 和为海洋的油的 Ro=4.6% 。初步的应用被介绍作为一个例子拿西南的 Tarim 盆。 | WANG Yunpeng ZHAO Changyi WANG Zhaoyun WANG Hongjun ZOU Yanrong LIU Jinzhong ZHAO Wenzhi LIU Dehan LU Jialan | 2008 | Acta Geologica Sinica(English Edition)2008，82，1： | 2 |
| 6 | Ag_(3)PO_(4) decorated black urchin-like defective TiO_(2) for rapid and long-term bacteria-killing under visible light显示文摘Both phototherapy via photocatalysts and physical puncture by artificial nanostructures are promising substitutes for antibiotics when treating drug-resistant bacterial infectious diseases.However,the photodynamic therapeutic efficacy of photocatalysts is seriously restricted by the rapid recombination of photogenerated electron-hole pairs.Meanwhile,the nanostructures of physical puncture are limited to two-dimensional(2D)platforms,and they cannot be fully used yet.Thus,this research developed a synergistic system of Ag_(3)PO_(4) nanoparticles(NPs),decorated with black urchin-like defective TiO_(2)(BU-TiO_(2-X)/Ag_(3)PO_(4)).These NPs had a decreased bandgap compared to BU-TiO_(2-X),and BU-TiO_(2)-X/Ag_(3)PO_(4)(3:1)exhibited the lowest bandgap and the highest separation efficiency for photogenerated electron-hole pairs.After combination with BU-TiO_(2-X),the photostability of Ag_(3)PO_(4) improved because the oxygen vacancy of BU-TiO_(2-X) retards the reduction of Ag^(+) in Ag_(3)PO_(4) into Ag^(0),thus reducing its toxicity.In addition,the nanospikes on the surface of BU-TiO_(2-X) can,from all directions,physically puncture bacterial cells,thus assisting the hybrid’s photodynamic therapeutic effects,alongside the small amount of Ag^(+) released from Ag_(3)PO_(4).This achieves synergy,endowing the hybrid with high antibacterial efficacy of 99.76±0.15%and 99.85±0.09%against Escherichia coli and Staphylococcus aureus,respectively,after light irradiation for 20 min followed by darkness for 12 h.It is anticipated that these findings may bring new insight for developing synergistic treatment strategies against bacterial infectious diseases or pathogenic bacterial polluted environments. | Yingde Xu Xiangmei Liu Yufeng Zheng Changyi Li Kelvin Wai Kwok Yeung Zhenduo Cui Yanqin Liang Zhaoyang Li Shengli Zhu Shuilin Wu | 2021 | Bioactive Materials2021，6，6： | 2 |
| 7 | Using tea nanoclusters asβ-lactamase inhibitors to cure multidrug-resistant bacterial pneumonia:A promising therapeutic strategy by Chinese materioherbology显示文摘β-lactamase,a kind of hydrolase in multi-drug resistant pathogens,can hydrolyzeβ-lactam antibiotics and make these kinds of antibiotics invalid.Small-molecular inhibitors about the enzyme and their mechanism are widely investigated but they may result in unavoidable adverse reactions and drug-resistance.Herein,we propose a new therapeutic strategy of Chinese materioherbology,in which herbal medicine or traditional Chinese medicinal herbs can be employed as biological functional materials or refreshed/excited by means of materialogy.Nat-ural tea nanoclusters(TNCs)were extracted from tea to inhibitβ-lactamase.Different from the mechanism of small-molecular inhibitors inhibiting enzymes by binding to the corresponding active sites,the TNCs as a cap cover the protein pocket and create a spatial barrier between the active sites and antibiotics,which was named“capping-pocket”effect.TNCs were combined with amoxicillin sodium(Amo)to treat the methicillin-resistant Staphylococcus aureus(MRSA)pneumonia in mice.This combinatorial therapy remarkably outperforms antibiotic monotherapy in reducing MRSA infections and the associated inflammation in mice.The therapeutic strategy exhibited excellent biosafety,without any side effects,even in piglets.Hence,TNCs have great clinical value in potentiatingβ-lactam antibiotic activity for combatting multi-drug resistant pathogen infections and the'pocket capping'effect can guide the design of new enzyme inhibitors in near future. | Ziao Zhou Jun Li Lei Tan Xiangmei Liu Yufeng Zheng Zhenduo Cui Changyi Li Kelvin Wai Kwok Yeung Zhaoyang Li Yanqin Liang Shengli Zhu Shuilin Wu | 2022 | Fundamental Research2022，2，3： | 1 |
| 8 | Energy Demand Prediction of the Building Sector Based on Induced Kernel Method and MESSAGEix Model显示文摘The building sector,including resident,commercial and public services,is one of the most energy-intensive sectors nowadays.The share of buildings’energy consumption in the final energy dramatically increases in various scenarios.As the preliminary work of the final energy prediction,the prediction of useful energy demand of the building sector is essential in the fields of energy-related research,especially for the scenarios design.To this end,this paper presents the prediction of energy demand in the building sector based on the Induced Kernel Method(IKM)for the useful energy.First,similar to other learning-based prediction methods,a database is constructed for the training.Specifically,the database contains not only the historical data of the useful energy demand and related indicators,but also some development templates to induce the prediction.Second,the detailed process is mathematically deduced to predict the useful energy demand components of the building sector,including electricity and heating.Finally,using various countries as examples,prediction results of the useful energy are presented in the numerical analysis.Furthermore,by using useful energy prediction results as the input of the MESSAGEix model,the paper further predicts global final energy of the building sector. | TAN Xin ZHAO Zijian LIU Changyi ZHANG Shining CHEN Xing HOU Fangxin YANG Fang GUO Fei | 2019 | Chinese Journal of Urban and Environmental Studies2019，7，4： | 1 |
| 9 | Analysis of water resource benefits due to power grid interconnections using the virtual water method显示文摘The global water demand and supply situation is becoming increasingly severe due to water shortage and uneven distribution of water resources.The highest water demand in the energy sector is attributable to power generation.With cross-country and cross-continental power grid interconnections becoming a reality,electricity trading across countries and the creation of new opportunities for re-allocation of water resources are possible.This study expands the concept of virtual water and proposes a generalized virtual water flow in an interconnected power grid system to accurately estimate water resource benefits of clean power transmission from both the production and the consumption sides.By defining the water scarcity index as a price mechanism indicator,the benefits of water resources allocation through power grid interconnections are evaluated.Taking the Africa-Asia-Europe interconnection scenario as an example,the total water saving would amount to 88.95 million m^3 by 2030 and 337.8 million m^3 by 2050.This result shows that grid interconnections could promote the development of renewable energy and expand the benefits of available water resources. | Xing Chen Zhiyuan Ma Xin Tan Yang Zhao Changyi Liu Feng Tan Fang Yang | 2019 | Global Energy Interconnection2019，2，3： | 1 |
| 10 | Plasma miR-126 Is a Potential Biomarker for Early Prediction of Type 2 Diabetes Mellitus in Susceptible Individuals显示文摘 | Tao Zhang Chunfang Lv Liling Li Sihan Chen Shenglin Liu Changyi Wang Bing Su Thean Hock Tang | 2013 | BioMed Research International2013，，： | 1 |
| 11 | A multi-functional Ru Mo bimetallic catalyst for ultra-efficient C3 alcohols production from liquid phase hydrogenolysis of glycerol显示文摘Ru and Mo bimetallic catalysts supported on active carbon modified by phosphotungstic acid(PW)were designed and applied in glycerol hydrogenolysis reaction.The physicochemical properties of the catalysts were characterized and the presence of active sites was investigated from the perspective of the glycerol hydrogenolysis performance.The MoOxis highly selective for the C—O bond cleavage of glycerol molecules,which can reasonably regulate the strong C—C bond cleavage activity of Ru nanoparticles.By using sequential deposition of Ru and Mo supported on mesoporous PW-C,the characterization results show that the combination of isolated low-valence MoOxwith metal Ru particles can form“MoOx-Ru-PW”,which provides highly catalytic activity toward C—O bond cleavage,selectively producing more C3 alcohols(mainly 1,2(3)-propanediol).The glycerol conversion of 1%Mo/Ru/PW-C catalyst was 59.6%,the selectivity of C3 alcohol was 96.1%,and the selectivity of propanediol(1,2(3)-propanediol)was 94.9%.It is noteworthy that the selectivity of 1,3-propanediol reached 20.7%when the PW was 21.07%(mass).This study provides experimental evidence for the tandem dehydration and hydrogenation mechanism of the multifunctional Mo/Ru/PW-C catalyst. | Guoxiao Cai Wei Xiong Susu Zhou Pingle Liu Yang Lv Fang Hao Hean Luo ChangYi Kong | 2022 | Chinese Journal of Chemical Engineering2022，，11： | 1 |
| 12 | Effect of microbial fermentation on the sensory characteristics and chemical compositions of Chinese sweet tea(Lithocarpus litseifolius(Hance)Chun)显示文摘Sweet tea,which has hundreds of years of use among in Chinese folk,is a traditional herbal tea with pleasant sweetness,bitterness and astringency.In the current study,we used traditional microbial fermentation to improve sensory characteristics of sweet tea,especially for the reduction of bitterness and astringency.The dynamic changes of non-volatile,volatile compounds and microbial community were investigated during microbial fermentation.The contents of polyphenols,flavonoids,soluble sugar,soluble protein,catechins and dihydrochalcones decreased significantly while the tea pigments,free amino acids and gallic acid content inversely increased during microbial fermentation.A total of 61 volatile compounds were identified and quantified in sweet tea,of which 20 key compounds were identified as odor active compounds(OAV),including 3 aldehydes,1 ketone,4 alcohols,9 esters,4 alkenes and 3 other compounds.In addition,eight fungi and four bacteria were considered as core microorganisms,such as Aspergillus,Alternaria,Cladosporium,Epicoccum,Itersonilia,Penicillium,Periconia,Wallemia,Aureimonas,Enterobacter,Klebsiella and Stenotrophomonas,which were significantly correlated with non-volatile compounds and flavor compounds.These results provided theoretical guidance for processing of fermented sweet tea. | Weimin Huang Changyi Zhang Zepeng Gu Cheng Li Zhengfeng Fang Zhen Zeng Zhiqing Zhang Bin Hu Hong Chen Wenjuan Wu Tiqiang Wang Xiguo Lan Yuntao Liu | 2022 | Food Bioscience2022，46，2： | 1 |
| 13 | Economic Assessment and Policy Analysis on Wind Energy Development in China显示文摘Considering rapid development and emerging new challenges of China’s wind energy development,this paper summarizes and analyzes five critical problems.First,according to an economic potential assessment,if the feed-in tariff is set 0.60 Yuan/kWh,the economic potential of wind electricity of China will reach 6.63 PWh,it could meet as much as 2/3 of total power demand by 2030,thus the targeted wind power proportion in future high renewable energy penetration can be achieved.Second,wind energy is abundant but little consumed in Northwest,Northeast and North China while it is insufficient in South and East of China,where grid-connection condition is well.Due to this reverse distribution pattern of wind power endowment and consumption in China,grid-connection transmission must be strengthened in the future,particularly the West-East and North-South power transmission projects must be pushed forward.Third,to address the issue of increasing wind energy curtailment in Northeast,Northwest and North China,stimulating local consumption of wind power by multiple ways is a possible solution in the short term,however,in the medium and long run,it is necessary to accelerate the construction of Ultra-High Voltage power grid in order to expand power transmission to other provinces and regions.Fourth,a new electricity market mechanism should be established as the fundamental measure of promoting new energy development,while green certificate trading market and carbon trading market will form the basis for such market mechanism in the long run.Fifth,though wind power development can bring multiple benefits to economy,employment,and environment,large-scale wind power development will,to some extent,affect local and regional climate.As global warming continues,the wind power resource distribution of China and the world may experience significant changes. | LIU Changyi ZHU Rong WANG Yang | 2017 | Chinese Journal of Urban and Environmental Studies2017，5，4： | 0 |
| 14 | Effects of urea-N and CO_(2) coupling fertilization on the growth,photosynthesis,yield and anthocyanin content of hydroponic purple cabbage Brassica campestris ssp.chinensis显示文摘Water and fertilizer coupling is a high-efficiency technology for the development of facility agriculture.However,the interaction effect of nitrogen(N)and air carbon dioxide(CO_(2))on hydroponic purple cabbage,especially on its leaf anthocyanins under hydroponic solution systems,remains unexplored.In this study,six treatments were set as C0N0,C0N2,C0N4,C1N0,C1N2 and C1N4,with N0,N2 and N4 being 0.0 g/L,0.2 g/L and 0.4 g/L exogenous urea-N to hydroponic solution dilution,respectively.C0 and C1 were set as with and without CO_(2)fertilizer(i.e.,800 g CO_(2)agent added one week after transplanting and 600 g CO_(2)agent added when the plant reached 15 cm in height),respectively.Pot experiments were conducted to investigate the interaction effect of N and air CO_(2)(N×CO_(2))on the growth,photosynthesis,yield and anthocyanin content of hydroponic purple cabbage Brassica campestris ssp.chinensis.The results showed N×CO_(2)extremely significantly influenced plant height(H),net photosynthetic rate(Pn),stomatal conductance(Gs),intercellular oxidation concentration(Ci),transpiration rate(Tr),leaf water use efficiency(LWUE)and yield.The C1N0 treatment had the largest yield at 262.5 g/plant,with higher values for root length,root weight,plant height and leaf number than the other treatments.The Pn,Ci and Tr of C1N4 were the highest at 3.05μmol CO_(2)/m2·s,352.8μmol CO_(2)/m2·s and 2.31 mmol H2O/m2·s,respectively.The C1N2 treatment received the largest Gs value of 0.70 mol H2O/m2·s and the largest Tr of 2.31 mmol H2O/m2·s.There was the highest LWUE for C0N2(1.41)and the highest anthocyanin content for C1N2(1.35 mg/kg).There was a significant negative correlation between leaf number and anthocyanin(r=-0.414,p<0.05).The findings demonstrated that adding CO_(2)fertilizer and 0.2 g/L exogenous urea-N to hydroponic solution dilution is a potential N×CO_(2)coupling strategy to increase anthocyanin and the yield of purple cabbage. | Danyan Chen Yuanyuan Feng Ya Liu Juan Hu Shilong Li Jingze Ma Xinyu Lu Xiaorui Jiang Shuhui Sun Zhi Yang Changyi Wang | 2023 | International Journal of Agricultural and Biological Engineering2023，16，5： | 0 |
| 15 | Feature Based Machining Process Planning Modeling and Integration for Life Cycle Engineering显示文摘Machining process data is the core of computer aided process planning application systems.It is also provides essen- tial content for product life cycle engineering.The character of CAPP that supports product LCE and virtual manufacturing is an- alyzed.The structure and content of machining process data concerning green manufacturing is also examined.A logic model of Machining Process Data has been built based on an object oriented approach,using UML technology and a physical model of machin- ing process data that utilizes XML technology.To realize the integration of design and process,an approach based on graph-based volume decomposition was apposed.Instead,to solve the problem of generation in the machining process,case-based reasoning and rule-based reasoning have been applied synthetically.Finally,the integration framework and interface that deal with the CAPP integration with CAD,CAM,PDM,and ERP are discussed. | LIU Changyi (College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China | 2006 | 武汉理工大学学报2006，28，S2： | 0 |
| 16 | Technology advance and discounting of the historical emission responsibilities显示文摘Solving the dispute over historical greenhouse gases emission responsibility is critical for the future climate agreement.This article borrows the methodology from the carbon budget proposal,but further develops this approach by proposing discount of the historical responsibility due to the technology advance.Firstly,it studies the Annex I countries'mitigation and financial responsibilities of the historical emission in the carbon budget proposal;furthermore,it analyzes the results and implications of the discount approach.Results show that the discount method significantly reduces the burden of the mitigation and financial responsibilities of the Annex I countries.Thus,we claim that the discount approach is a systematic,pragmatic,and fair approach to solve the historical responsibility dispute and financial problems for the post-2020international climate institutions. | Changyi Liu Jiahua Pan Ying Chen | 2015 | Chinese Journal of Population,Resources and Environment2015，13，2： | 0 |
| 17 | Micro-Newton scale variable thrust control technique and its noise problem for drag-free satellite platforms:a review显示文摘High-precision detection in fundamental space physics,such as space gravitational wave detection,high-precision earth gravity field measurement,and reference frame drag effect measurement,is the key to achieving important breakthroughs in the scientific study of fundamental space physics.Acquiring high-precision measurements requires high-performance satellite platforms to achieve“drag-free control”in a near“pure gravity”flight environment.The critical technology for drag-free control is variable thrust control at the micro-Newton scale.Thrust noise is the most important technical indicator for achieving drag-free flight.However,there is no literature about the current status and future prospects of variable thrust control based on thrust noise.Therefore,the micro-Newton variable thrust control technology and the thrust noise of the drag-free satellite platform are reviewed in this work.Firstly,the research status of micro-Newton scale variable thrust control technology and its applications to drag-free satellite platforms are introduced.Then,the noise problem is analyzed in detail and its solution is theoretically investigated in three aspects:“cross-basin flow problem,”“control problem,”and“system instability and multiple-coupled problem.”Finally,a systematic overview is presented and the corresponding suggested directions of research are discussed.This work provides detailed understanding and support for realizing low-noise variable thrust control in the next generation of drag-free satellites. | Changyi XU Wenya LI Xuhui LIU Yong LI Chao ZHANG | 2023 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2023，24，10： | 0 |
| 18 | Clinical Features of Spontaneous Remission in the Classic Fever of Unknown Origin:A Retrospective Study显示文摘Objective To summarize the clinical features of spontaneous remission in classic fever of unknown origin(FUO).Methods Medical records of 121 patients diagnosed with FUO at admission in Peking Union Medical College Hospital between January 2018 and June 2018 were reviewed retrospectively.Patients who were discharged without etiological diagnoses were followed for 2 years.The clinical features and outcomes of these patients were summarized.Multivariate logistic regression was used to analyze related factors of spontaneous remission of FUO.Results After excluding 2 patients who lost to follow-up,the etiology of 119 FUO patients were as follows:infectious diseases in 30(25.2%)cases,connective tissue diseases in 28(23.5%)cases,tumor diseases in 8(6.7%)cases,other diseases in 6(5.0%)cases,and unknown diagnoses in 47(39.5%)cases.Totally,41 patients experienced spontaneous remission of fever(the median time from onset to remission was 9 weeks,ranging from 4 to 39 weeks).In patients with spontaneous remission in FUO,lymphadenopathy was less common clinical manifestation,the levels of inflammatory markers including leukocyte count,neutrophil count,neutrophil ratio,C-reactive protein,and ferritin were lower,and the proportion of CD8 positive T lymphocytes expressing CD38 was lower.Multivariate logistic regression analysis of factors with a P-value<0.05 in univariate analysis shown that white blood cell count(OR:0.S45,95%CI:0.306-0.971,P=0.039),neutrophil count(OR:2.074,95%CI:1.004-4.284,P=0.049),and proportion of neutrophils(OR:0.928,95%Cl:0.871-0.990,P=0.022)were independent significant factors associated with spontaneous remission in FUO.Conclusions This study suggested that most patients discharged with undiagnosed classic FUO would remit spontaneously.Thus,for patients with stable clinical conditions,follow-up and observation could be the best choice.Patients with lower level of some inflammatory factors may have a high likelihood of spontaneous remission in classic FUO. | Changyi Liu Xiaoqing Liu Xiaochun Shi | 2022 | Chinese Medical Sciences Journal2022，37，2： | 0 |
| 19 | Internet Based Reconfigurable Architecture for CAPP Development and Customization显示文摘 | Changyi Liu Gewei Zhang Wenhe Liao | 2006 | 通讯和计算机(中英文版)2006，3，1： | 0 |
| 20 | Poverty Reduction Effect of Adaptation to Climate Change: Empirical Evidence from China’s Loess Plateau and Qinba Mountains显示文摘Based on the micro-survey data of rural households in China’s Loess Plateau and Qinba Mountains,this paper empirically examines the poverty reduction effect and mechanism of adaptation to climate change.The research conclusions show that the adaptation actions can significantly reduce the poverty vulnerability of farmers,especially the future incidence of poverty in agricultural or poor households to a greater extent,which is characterized by a“pro-poor”effect.Adaptation actions can reduce poverty from two aspects:decreasing the expected income volatility(loss mitigation effect)and increasing the expected income level(opportunity effect),and the former is stronger than the latter.In the post-2020 period,China should enhance policy support in rural areas to adapt to climate change,improve the resilience of farmers’livelihoods and climate change resilience of rural areas,and promote sustainable poverty reduction. | LIU Jie LIU Changyi | 2020 | Chinese Journal of Urban and Environmental Studies2020，8，3： | 0 |
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