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| 1 | Farmland changes and the driving forces in Yucheng, North China Plain显示文摘拿 Yucheng,在是的山东省的一个典型的农业县一个盒子,应用逻辑回归建模空间地识别影响农田的因素的这研究变化。用在 2001 和 2009 的高分辨率形象的二个阶段,学习在 20012009 获得了陆地使用和农田变化数据。农田被 5.14% 在时期减少,这被发现,主要由于到森林土地的农田变换并且布满建筑物土地,尽管森林土地的部分和闲置的土地被变换成农田。逻辑回归的结果显示那个地点,人口生长和农民收入是影响农田变换的主要因素,当土壤打字时并且支持弯曲是控制农田变化的分发的主要自然因素。地区性的差别和农田变化的时间空间的变量影响了逻辑回归模型的恰当的能力。巨鸟恰当的测试显示逻辑回归模型给了地区性的陆地使用变化的好解释。逻辑回归分析是一个好工具鉴别影响陆地使用的主要因素由确定改变每个因素的贡献。 | Chen Zhao Lu Changhe Fan Lan | 2012 | Journal of Geographical Sciences2012，22，3： | 7 |
| 2 | Study on drying and combustion process in grate-CFB incinerator显示文摘The drying and combustion process in the combined grate and circulating fluidized bed(grate-CFB) municipal solid waste(MSW) incinerator was investigated experimentally and mathematically.The drying grate bed was simulated by a muffle furnace,which could be controlled at a constant tempera-ture level.The kind of wastes,thickness of waste layer fed and temperature were chosen as the ad-justable parameters to study their effect on the drying process.The experimental results indicated that the hydrophilic wastes were more difficult to be dried than the hydrophobic wastes.The higher the temperature is the easier the waste is to be dried.The thinner waste layer is favorable to drying the waste.The pyrolysis experiment in the furnace showed that the higher temperature level could reduce the conversion rate of carbon to carbon monoxide.The semi-empirical mathematical model that in-cluded the bed material distribution submodel,volatile matter release submodel,carbon particle combustion submodel and so on was proposed.A 260 t/d grate-CFB incinerator was modeled and the model predicted bulk density agreed with the measured value from industrial field test.The predicted flue gas(e.g.CO2,CO) concentration deviated slightly from the industrial test data.The parameters and variables used in the model were determined by the experiments or practical field test.This model can be used to design the grate-CFB incinerator and guide its operation. | QingHai Li YanGuo Zhang MeiQian Chen AiHong Meng ChangHe Chen | 2009 | Science China(Technological Sciences)2009，52，5： | 3 |
| 3 | Fiber-reinforced composites in milling and grinding:machining bottlenecks and advanced strategies显示文摘Fiber-reinforced composites have become the preferred material in the fields of aviation and aerospace because of their high-strength performance in unit weight.The composite components are manufactured by near netshape and only require finishing operations to achieve final dimensional and assembly tolerances.Milling and grinding arise as the preferred choices because of their precision processing.Nevertheless,given their laminated,anisotropic,and heterogeneous nature,these materials are considered difficult-to-machine.As undesirable results and challenging breakthroughs,the surface damage and integrity of these materials is a research hotspot with important engineering significance.This review summarizes an up-to-date progress of the damage formation mechanisms and suppression strategies in milling and grinding for the fiber-reinforced composites reported in the literature.First,the formation mechanisms of milling damage,including delamination,burr,and tear,are analyzed.Second,the grinding mechanisms,covering material removal mechanism,thermal mechanical behavior,surface integrity,and damage,are discussed.Third,suppression strategies are reviewed systematically from the aspects of advanced cutting tools and technologies,including ultrasonic vibration-assisted machining,cryogenic cooling,minimum quantity lubrication(MQL),and tool optimization design.Ultrasonic vibration shows the greatest advantage of restraining machining force,which can be reduced by approximately 60%compared with conventional machining.Cryogenic cooling is the most effective method to reduce temperature with a maximum reduction of approximately 60%.MQL shows its advantages in terms of reducing friction coefficient,force,temperature,and tool wear.Finally,research gaps and future exploration directions are prospected,giving researchers opportunity to deepen specific aspects and explore new area for achieving high precision surface machining of fiber-reinforced composites. | Teng GAO Yanbin ZHANG Changhe LI Yiqi WANG Yun CHEN Qinglong AN Song ZHANG Hao Nan LI Huajun CAO Hafiz Muhammad ALI Zongming ZHOU Shubham SHARMA | 2022 | Frontiers of Mechanical Engineering2022，17，2： | 3 |
| 4 | Minimum quantity lubrication machining of aeronautical materials using carbon group nanolubricant: From mechanisms to application显示文摘It is an inevitable trend of sustainable manufacturing to replace flood and dry machining with minimum quantity lubrication(MQL)technology.Nevertheless,for aeronautical difficult-tomachine materials,MQL couldn’t meet the high demand of cooling and lubrication due to high heat generation during machining.Nano-biolubricants,especially non-toxic carbon group nano-enhancers(CGNs)are used,can solve this technical bottleneck.However,the machining mechanisms under lubrication of CGNs are unclear at complex interface between tool and workpiece,which characterized by high temperature,pressure,and speed,limited its application in factories and necessitates in-depth understanding.To fill this gap,this study concentrates on the comprehensive quantitative assessment of tribological characteristics based on force,tool wear,chip,and surface integrity in titanium alloy and nickel alloy machining and attempts to answer mechanisms systematically.First,to establish evaluation standard,the cutting mechanisms and performance improvement behavior covering antifriction,antiwear,tool failure,material removal,and surface formation of MQL were revealed.Second,the unique film formation and lubrication behaviors of CGNs in MQL turning,milling,and grinding are concluded.The influence law of molecular structure and micromorphology of CGNs was also answered and optimized options were recommended by considering diverse boundary conditions.Finally,in view of CGNs limitations in MQL,the future development direction is proposed,which needs to be improved in thermal stability of lubricant,activity of CGNs,controllable atomization and transportation methods,and intelligent formation of processing technology solutions. | Xin CUI Changhe LI Wenfeng Ding Yun CHEN Cong MAO Xuefeng XU Bo LIU Dazhong WANG Hao Nan LI Yanbin ZHANG Zafar SAID Sujan DEBNATH Muhammad JAMIL Hafiz Muhammad ALI Shubham SHARMA | 2022 | Chinese Journal of Aeronautics2022，35，11： | 3 |
| 5 | Biological Stability of Water-Based Cutting Fluids:Progress and Application显示文摘The application of cutting fluid in the field of engineering manufacturing has a history of hundreds of years,and it plays a vital role in the processing efficiency and surface quality of parts.Among them,water-based cutting fluid accounts for more than 90%of the consumption of cutting fluid.However,long-term recycling of water-based cutting fluid could easily cause deterioration,and the breeding of bacteria could cause the cutting fluid to fail,increase manufacturing costs,and even endanger the health of workers.Traditional bactericides could improve the biological stability of cutting fluids,but they are toxic to the environment and do not conform to the development trend of low-carbon manufacturing.Low-carbon manufacturing is inevitable and the direction of sustainable manufacturing.The use of nanomaterials,transition metal complexes,and physical sterilization methods on the bacterial cell membrane and genetic material could effectively solve this problem.In this article,the mechanism of action of additives and microbial metabolites was first analyzed.Then,the denaturation mechanism of traditional bactericides on the target protein and the effect of sterilization efficiency were summarized.Further,the mechanism of nanomaterials disrupting cell membrane potential was discussed.The effects of lipophilicity and the atomic number of transition metal complexes on cell membrane penetration were also summarized,and the effects of ultraviolet rays and ozone on the destruction of bacterial genetic material were reviewed.In other words,the bactericidal performance,hazard,degradability,and economics of various sterilization methods were comprehensively evaluated,and the potential development direction of improving the biological stability of cutting fluid was proposed. | Lizhi Tang Yanbin Zhang Changhe Li Zongming Zhou Xiaolin Nie Yun Chen Huajun Cao Bo Liu Naiqing Zhang Zafar Said Sujan Debnath Muhammad Jamil Hafiz Muhammad Ali Shubham Sharma | 2022 | Chinese Journal of Mechanical Engineering2022，35，1： | 2 |
| 6 | Effect of operating parameters and reactor structure on moderate temperature dry desulfurization 显示文摘 | ZHANG Jie YOU Changfu QI Haiying HOU Bo CHEN Changhe XU Xuehang | 2006 | Environmental Scieme & Technology2006，40，13： | 1 |
| 7 | Effect of sulfated CaO on NO reduction by NH3 in the presence of excess oxygen 显示文摘 | LI Tianjin ZHUO Yuqun ZHAO Yufeng CHEN Changhe XU Xuchang | 2009 | Energy & Fuels2009，23，4： | 1 |
| 8 | Development of coal combustion pollution control for SO2 and NOx in China 显示文摘 | XU Xuchang CHEN Changhe QI Haiyin | 2000 | Fuel Proc Technol2000，62，： | 1 |
| 9 | Development of coalcombustion pollution control for SO2 and NOx in China显示文摘 | Xu XuChang Chen Changhe Qi Haiyin | 2000 | Fuel Processing Technology2000，62，： | 1 |
| 10 | Finite element analysis of low-velocity impact damage of stitched laminates显示文摘 | Chen Gang Li Zhengneng Kou Changhe | 2004 | Journal of Reinforced Plastics and Composites2004，23，9： | 1 |
| 11 | Development of coal combustion pollution control for SO2 and NOx in China显示文摘 | Xu Xuchang Chen Changhe Qi Haiyin | 2000 | Fuel Process Technol2000，62，23： | 1 |
| 12 | Development of coal combustion pollution control for SO2 and NOx in China显示文摘 | Xu Xuchang Chen Changhe Qi Haiyin | 2000 | Fuel Processing Technology2000，，62： | 1 |
| 13 | Efficacy and safety of darbepoetin alfa injection replacing epoetin alfa injection for the treatment of renal anemia in Chinese hemodialysis patients:A randomized,open-label,parallel-group,noninferiority phase III trial显示文摘Background:This study was to explore the clinical efficacy and safety of darbepoetin alfa injection replacing epoetin alfa injection(recombinant human erythropoietin injection,rHuEPO)for the treatment of anemia associated with chronic kidney failure in Chinese patients undergoing hemodialysis.Method:This study was a multicenter,randomized,open-label,intergroup parallel control phase III noninferiority trial from April 19,2013 to September 9,2014 at 25 sites.In this study,the members of the darbepoetin alfa group underwent intravenous administration once per week or once every two weeks.The members of the control drug epoetin alfa group underwent intravenous administration two or three times per week.All subjects underwent epoetin alfa administration during the 8-week baseline period.After that,subjects were randomly assigned to the darbepoetin alfa group or epoetin alfa group.The noninferiority in the changes of the average Hb concentrations from the baseline to the end of the evaluation period(noninferiority threshold:-1.0 g/dl)was tested between the two treatments.The time-dependent hemoglobin(Hb)concentration and the maintenance rate of the target Hb concentration(the proportion of subjects with Hb concentrations between 10.0 and 12.0 g/dl)were also evaluated.Iron metabolism,including changes in the serum iron,total iron-binding capacity,ferritin,transferrin saturation,and comparisons of the dose adjustments between the two groups during the treatment period were analyzed further.Adverse events(AEs)were also observed and compared,and the safety was analyzed between the two treatment groups.The conversion rate switching from epoetin alfa to darbepoetin alfa was also discussed.SAS?software version 9.2 was used to perform all statistical analyses.Descriptive statistics were used for all efficacy,safety,and demographic variable analyses,including for the primary efficacy indicators.Results:Four hundred and sixty-six patients were enrolled in this study,and ultimately 384 cases were analyzed for safety,including 267 cases in the darbepoetin alfa group and 117 cases in the epoetin alfa group.There were 211 cases in the per-protocol set,including 152 cases in the darbepoetin alfa group and 59 cases in the epoetin alfa group.The changes in the average Hb concentrations from the baseline to the end of the evaluation period were-0.07 and-0.15 g/dl in the darbepoetin alfa group and epoetin alfa group respectively.The difference between the two groups was 0.08 g/dl(95%confidence interval[CI]:-0.22 to 0.39),and the lower limit of the 95%CI was-0.22>-1.0 g/dl.The average Hb concentrations of the two groups were 10.88-11.43 g/dl(darbepoetin alfa)and 10.91-11.38 g/dl(epoetin alfa)during the study period of Weeks 0-28,with the maintenance rates of the target Hb concentration ranging within 71%-87%and 78%-95%in the darbepoetin alfa group and epoetin alfa group respectively.During the period of comparison between the two groups,the incidence of AEs in the darbepoetin alfa group was 61.42%,while in the epoetin alfa group it was 56.41%.All of the adverse events and reactions in the study were those commonly associated with hemodialysis.Conclusion:The overall efficacy and safety of darbepoetin alfa for the treatment of Chinese renal anemia patients undergoing hemodialysis are consistent with those of epoetin alfa. | Bicheng Liu Nan Chen Jinghong Zhao Aiping Yin Xiongfei Wu Changying Xing Gengru Jiang Junzhou Fu Mei Wang Rong Wang Jianying Niu Ping Fu Zhaohui Ni Fanfan Hou Jiuyang Zhao Jing Chen Yuqing Chen Wei Shi Jianghua Chen Wenge Li Gang Xu Ling Zhong Wenhu Liu Guohua Ding Yuichiro Kondo Changhe Yue Changlin Mei | 2022 | Chronic Diseases and Translational Medicine2022，8，2： | 1 |
| 14 | Development of coal combustion pollution control for SO2 and NOx in China显示文摘 | Xu Xuchang Chen Changhe Qi Haiyin | 2000 | Fuel Processing Technology2000，62，23： | 1 |
| 15 | Development of coal combustion pollution control for SO2and NOx in China显示文摘 | changhe Chen Haiyin Qi | 2000 | Fuel Processing Technology2000，62，： | 1 |
| 16 | Evolution of pore fractal dimensions for burning porous chars显示文摘 | HE Rong XU Xuchang CHEN Changhe | 1998 | Fuel1998，77，12： | 1 |
| 17 | Development of coal combustion pollution control for SO2 and NOx in China 显示文摘 | XuchangXu Changhe Chen Heiyin Qi Rong He Changfu You Guangming Xiang | 2000 | Fuel Processing Technology2000，62，23： | 1 |
| 18 | Development of coal combustion pollution control for SO2 and NOx in China 显示文摘 | Xu Chang Changhe Chen Haiying Qi | 2000 | Fuel Processing Technology2000，62，： | 1 |
| 19 | Development of coal combustion pollution control for SO2 and NOx in China显示文摘 | Xu Xuchang Chen Changhe Qi Haiyin | 2000 | Fuel Process Technol2000，62，23： | 1 |
| 20 | Angiographic morphologic features of infarct-related arteries and timely reperfusion in acute myocardial infarction: Predictors of slowflow and no-reflow 显示文摘 | Yip H K Chen M C ChangH W etal | 2002 | Chest2002，122，： | 1 |
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