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Design of Ca-type todorokite catalysts with highly active for the selective reduction of NO_(x) by NH_(3) at low temperatures

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Journal of Environmental Sciences 2024年第4期138卷 697-708页

作者： chuang chang Zidi Yan Chunlei Zhang Yanshuang Zhang Miao Jiang Luna Ruan Min Xiao Yunbo Yu Hong He School of Rare Earths University of Science and Technology of ChinaHefei 230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Ca-type todorokite catalysts were designed and prepared by a simple redox method and applied to the selective reduction of NO_(x) by NH_(3)(NH_(3)-SCR)for the first *** with the Na-type manjiroite prepared by the same method,the todorokite catalysts with different Mn/Ca ratios showed greatly improved catalytic activity for NO_(x) *** them,Mn8Ca4 catalyst exhibited the best NH_(3)-SCR performance,achieving 90%NO_(x) conversion within temperature range of 70-275℃ and having a high sulphur *** to the Na-type manjiroite sample,Ca-type todorokite catalysts possessed an increased size of tunnel,resulting in a larger specific surface *** increased the amounts of Ca doping,the Na content in Ca-type todorokite catalysts significantly decreased,providing larger amounts of Bronsted acid sites for NH_(3) adsorption to produce NH_(4)^(+).The NH_(4)^(+)species were highly active for reaction with NO+O_(2),playing a determining role in NH_(3)-SCR process at low ***,larger amounts of surface adsorbed oxygen contained over the Ca-doping samples than that over Na-type manjiroite,promoting the oxidation of NO and fast SCR *** the Ca-type todorokite catalysts,furthermore,nitrates produced during the flow of NO+O_(2),were more active for reaction with NH_(3) than that over Na-type manjiroite,benefiting the occurrence of NH_(3)-SCR *** study provides novel insights into the design of NH_(3)-SCR catalysts with high performance.

关键词： NO_(x) NH_(3)-SCR Mn-based oxides Ca-type todorokite Bronsted acid sites

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Single-incision laparoscopic surgery to treat hepatopancreatobiliary cancer:A technical review

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World Journal of Gastroenterology 2022年第27期28卷 3359-3369页

作者： Shu-Hung chuang Shih-chang chuang Division of General and Digestive Surgery Department of SurgeryKaohsiung Medical University HospitalKaohsiung Medical UniversityKaohsiung 80708Taiwan School of Medicine College of MedicineKaohsiung Medical UniversityKaohsiung 80708Taiwan

Single-incision laparoscopic surgery(SILS),or laparoendoscopic single-site surgery,was launched to minimize incisional traumatic effects in the *** SILS,such as cholecystectomies,have been gaining in popularity over the past few *** application in complicated hepatopancreatobiliary(HPB)surgeries,however,has made slow progress due to instrumental and technical limitations,costs,and safety *** minimally invasive abdominal surgery is pushing the boundaries,advanced laparoscopic HPB surgeries have been shown to be comparable to open operations in terms of patient and oncologic safety,including hepatectomies,distal pancreatectomies(DP),and pancreaticoduodenectomies(PD).In contrast,advanced SILS for HPB malignancy has only been reported in a few small case *** of the procedures involved minor liver resections and DP;major hepatectomies were rarely *** laparoscopic PD has not yet been *** herein review the published SILS for HPB cancer in the literature and our three-year experience focusing on the technical aspects.

关键词： Hepatectomy Hepatopancreatobiliary cancer Laparoendoscopic single-site surgery Pancreatectomy Pancreaticoduodenectomy Single-incision laparoscopic surgery

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Laparoscopic common bile duct exploration to treat choledocholithiasis in situs inversus patients:A technical review

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World Journal of Clinical Cases 2023年第9期11卷 1939-1950页

作者： Bo-Ya Chiu Shu-Hung chuang Shih-chang chuang Kung-Kai Kuo School of Post-baccalaureate Medicine College of MedicineKaohsiung Medical UniversityKaohsiung 80708Taiwan Division of General and Digestive Surgery Department of SurgeryKaohsiung Medical University HospitalKaohsiung Medical UniversityKaohsiung 80708Taiwan School of Medicine College of MedicineKaohsiung Medical UniversityKaohsiung 80708Taiwan

Situs inversus(SI)is a rare congenital condition characterized by a mirror-image transposition of the major visceral *** the 1990s,more than one hundred SI patients have been reported to have successfully undergone laparoscopic *** these cases,the major problem is to overcome is the left-right condition for right-handed *** common bile duct exploration(LCBDE),an alternative to treat patients with bile duct stones,has shown equivalent efficacy and is less likely to cause pancreatitis than endoscopic retrograde *** updated meta-analyses revealed that a shorter postoperative hospital stay,fewer procedural interventions,cost-effectiveness,a higher stone clearance rate,and fewer perioperative complications are additional advantages of ***,the technique is technically demanding,even for skilled laparoscopic *** LCBDE in patients with difficult situations,such as SI,is more complex than *** herein review published SI patients with choledocholithiasis treated by LCBDE,including our own experience,and this paper focuses on the technical aspects.

关键词： Choledocholithiasis Choledochotomy Laparoscopic common bile duct exploration Single incision Situs inversus Transcystic

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转子系统动力学仿真平台设计与实验验证

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东北大学学报（自然科学版） 2023年第3期44卷 375-381页

作者：罗忠吴东泽李雷葛长闯东北大学机械工程与自动化学院辽宁沈阳110819 东北大学航空动力装备振动及控制教育部重点实验室辽宁沈阳110819 东北大学佛山研究生院广东佛山528312 中国航发沈阳发动机研究所辽宁沈阳110015

转子系统动力学仿真中模型建立、支承设置、网格划分、约束设置等操作导致计算分析效率低,且操作繁琐易导致设置遗漏或误触.针对此问题,提出一种转子系统动力学仿真平台,实现了转子系统参数化建模与自动化仿真,提升了转子系统的仿真效率... 详细信息

转子系统动力学仿真中模型建立、支承设置、网格划分、约束设置等操作导致计算分析效率低,且操作繁琐易导致设置遗漏或误触.针对此问题,提出一种转子系统动力学仿真平台,实现了转子系统参数化建模与自动化仿真,提升了转子系统的仿真效率.首先,采用ACT(application customization toolkit),Python和XML联合设计的方法,对参数化建模模块和动力学仿真模块进行界面、功能、数据传递的设计.然后,在仿真实例中详细展示了此平台的工作流程、具体功能和仿真结果.最后,通过现有转子实验台对仿真平台进行实验验证,结果表明,仿真和实验的误差较小,证明了仿真平台的可行性和有效性.

关键词：转子系统动力学仿真平台参数化建模自动化仿真 ACT

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A cohort study of hospitalized adult dengue patients with fatality in Taiwan: The elderly and febrile characteristics matter for prognosis

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Asian Pacific Journal of Tropical Medicine 2020年第7期13卷 301-307页

作者： Tsung-Hang Kuo Chia-chang chuang Chin-Chung Tseng Ming-Yuan Hong Sheng-Hsiang Lin Institute of Clinical Medicine College of MedicineNational Cheng Kung UniversityTainan 70403 Department of emergency National Cheng Kung University HospitalCollege of MedicineNational Cheng Kung UniversityTainan 70403 Department of Internal Medicine National Cheng Kung University HospitalCollege of MedicineNational Cheng Kung UniversityTainan 70403 Biostatistics Consulting Center National Cheng Kung University HospitalCollege of MedicineNational Cheng Kung UniversityTainan 70403 Department of Public Health College of MedicineNational Cheng Kung UniversityTainan 70403

Objective:To identify the febrile characteristics and clinical presentations associated with fatality in hospitalized adult patients with dengue virus(DENV)***:A total of 289 adult hospitalized patients with laboratoryconfirmed DENV infections were examined,of which 22 were fatal and 267 were non-fatal.A comparison of the clinical and laboratory characteristics was retrospectively conducted of the deceased and surviving *** logistic regression and receiver operating characteristic curve analysis were performed to identify predictors of ***:Fatal patients exhibited significantly more comorbidities,particularly renal and cardiac comorbidities,and they were,in general,older than control individuals(P<0.0001).The results of logistic regression analysis showed that febrile duration of less than four days before arriving in the Emergency Department(OR=5.34;95%CI:1.39–20.6),episode of hypotension in the Emergency Department(OR=6.95;95%CI:2.40–20.1),and comorbidity with congestive heart failure(OR=11.26;95%CI:2.31–54.79)were all significantly associated with inpatient fatality due to DENV *** ROC curve analysis indicated that the final prognostic model yielded an area under the curve of 0.87(95%CI:0.79–0.97)for ***:The aforementioned clinical findings may help clinicians predict fatality among adult inpatients with DENV infection.

关键词： Dengue Hospitalized patient Adult Fatality Febrile duration Hypotension

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基于测井参数的煤储层地应力计算方法研究——以延川南区块为例

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煤田地质与勘探 2023年第5期51卷 23-32页

作者：常闯李松汤达祯冯鹏中国地质大学(北京)能源学院北京100083 煤层气开发利用国家工程中心煤储层实验室北京100083

地应力对煤储层渗透率的影响贯穿整个煤层气开采过程,进而影响煤层气的运移和产出效果。为了探讨煤层地应力的有效计算方法,以鄂尔多斯盆地东缘延川南区块为例,基于研究区主力煤层测井、试井资料,及煤岩泊松比、弹性模量、储层压力等参... 详细信息

地应力对煤储层渗透率的影响贯穿整个煤层气开采过程,进而影响煤层气的运移和产出效果。为了探讨煤层地应力的有效计算方法,以鄂尔多斯盆地东缘延川南区块为例,基于研究区主力煤层测井、试井资料,及煤岩泊松比、弹性模量、储层压力等参数计算结果,构建适用于该区煤储层地应力的计算模型,并对研究区地应力分布特征进行剖析。结果表明:(1)相比于组合弹簧模型,修改后的葛氏模型计算的煤层水平主应力平均相对误差更小,更适用于延川南区块地应力预测;(2)研究区2号煤层最小水平主应力(σ_(h))为9.23~29.36 MPa,平均16.87 MPa,最大水平主应力(σ_(H))为10.74~44.71 MPa,平均25.49 MPa,垂向主应力(σ_(v))为15.64~39.51 MPa,平均27.07 MPa;(3)平面上,研究区以西掌断裂带为分界线,煤储层地应力呈现西北高、东南低的特征;垂向上,随煤层埋深的增大,3个方向的应力及侧压系数均呈现递增的趋势,应力场状态也由正断型(σ_(v)>σ_(H)>σ_(h))逐渐向走滑型(σ_(H)≈σ_(v)>σ_(h))转变,且区内煤储层侧压系数及应力场状态的变化与小型逆断层的分布密切相关。修改后的葛氏模型预测精准度达92.15%,且可通过修改构造应力系数应用到其他区块,对研究区深部煤层气乃至对其他区块深部煤层气开发具有重要意义。

关键词：地应力测井葛氏模型侧压系数逆断层延川南

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The siphonic energy transfer between hot solar wind and cold martian ionosphere through open magnetic flux rope

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Fundamental Research 2024年第4期4卷 882-889页

作者： Xiaojun Xu Lou-chuang Lee Qi Xu Qing chang Jing Wang Ming Wang Shaosui Xu Christian Mosti Charles J.Farrugia Xing Wang Yudong Ye Zilu Zhou Lei Luo Peishan He Shaoguan Cheng State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao 999078China CNSA Macao Center for Space Exploration and Science Macao 999078China Institute of Earth Science Academia SinicaTaipei 115029China Institute of Space Science and Applied Technology Harbin Institute of TechnologyShenzhen 518000China Planetary Environmental and Astrobiological Research Laboratory(PEARL) School of Atmospheric SciencesSun Yat-sen UniversityZhuhai 519000China Nanjing University of Information Science and Technology Nanjing 210000China Space ScienceLaboratory Universityof CaliforniaBerkeleyCA94320USA Space Research Institute Austrian Academy of SciencesGraz 8010Austria University of New Hampshire NH 03824USA

A mechanism for energy transfer from the solar wind to the Martian ionosphere through open magnetic flux rope is proposed based on the observations by Mars Atmosphere and Volatile EvolutioN(MAVEN).The satellite was located in the dayside magnetosheath at an altitude of about 70o km above the northern *** between the hot solar wind protons and the cold heavy ions/neutrals in the subsolar region can cool the protons and heat the heavy *** a result,the magnetosheath protons are siphoned into the ionosphere due to the thermal pressure gradient of protons and the heated heavy ions escape along the open magnetic field *** direct collisions in the lower-altitude region were not detected,this physical process is demonstrated by MAVEN measurements of enhanced proton density,decreased proton temperature and oppositely directed motions of hot and cool protons within the flux rope,which are very different from the observational features of the flux transfer events near the Earth's *** mechanism could universally exist in many contexts where a collisionless plasma region is connected to a collisional plasma *** reconstructing the magnetic geometry and the cross-section of the flux rope using the Grad-Shafranov technique,the ion loss rates are quantitatively estimated to be on the order of 1023 s-l,which is much higher than previously estimated.

关键词： Mars Flux rope Solarwind Ionosphere Ion loss

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测量不确定度在几何量检测中的应用

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仪器仪表标准化与计量 2022年第6期 22-24,43页

作者：王塘杰常闯中国船舶重工集团公司第七一三研究所郑州市450000

几何量测量在各个领域,尤其是机械产品的研发、生产及制造中均广泛存在,对于制造与装配精度要求较高的测量,其测量结果及数据处理至关重要。本文主要针对测量不确定度在几何量检测中的应用进行阐述,首先对标准不确定度的A类及B类评定方... 详细信息

几何量测量在各个领域,尤其是机械产品的研发、生产及制造中均广泛存在,对于制造与装配精度要求较高的测量,其测量结果及数据处理至关重要。本文主要针对测量不确定度在几何量检测中的应用进行阐述,首先对标准不确定度的A类及B类评定方法及流程进行介绍,然后通过实例说明在几何量检测中测量不确定度的分析和计算,旨在为提高几何量检测质量,更好地服务生产和生活提供参考和借鉴。

关键词：测量不确定度几何量检测千分尺

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炼油装置高压热交换器Ω环密封失效分析

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石油化工设备 2015年第5期44卷 83-86页

作者：殷昌创中国昆仑工程公司北京100037

针对某高压热交换器Ω环的裂纹进行了材料化学成分分析、裂纹的宏观形貌分析、材料金相及裂纹扩展分析以及断口的微观形貌分析,找出了Ω环裂纹产生的原因,探讨了高压热交换器Ω环的选材问题,根据分析结果提出了Ω环的改进措施。

关键词：高压热交换器 Ω环连多硫酸失效分析

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基于HPLC-MS/MS技术的酮病奶牛血清脂质代谢物分析

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中国兽医学报 2024年第4期44卷 802-807页

作者：李卓常仁旭孙旭东徐闯黑龙江八一农垦大学动物科技学院黑龙江大庆163319

对25头荷斯坦奶牛进行初次筛选,包含13头疑似酮病和12头疑似健康奶牛。依据临床症状和血液酮体浓度将其分为临床型酮病组(血液中BHBA≥3.0mmol/L,NEFA>0.5mmol/L,且表现消瘦、食欲减退)及健康组(血液中BHBA1的脂质分子。结果显示:共筛选... 详细信息

对25头荷斯坦奶牛进行初次筛选,包含13头疑似酮病和12头疑似健康奶牛。依据临床症状和血液酮体浓度将其分为临床型酮病组(血液中BHBA≥3.0mmol/L,NEFA>0.5mmol/L,且表现消瘦、食欲减退)及健康组(血液中BHBA1的脂质分子。结果显示:共筛选出18个与酮病相关的差异代谢物,与健康组相比,酮病组其中有5种磷脂酰胆碱(phosphatidylcholine,PC)、4种胆固醇酯(cholesterol esters,CE)、2种鞘磷脂(sphingomyelin,SM)、2种溶血磷脂酰胆碱(lyso-phosphatidyl choline,LPC)、2种甘油三酯(triglyceride,TAG)降低;有3种游离脂肪酸(free fat acid,FFA)升高。结果表明,这些异常的脂质可能是酮病奶牛的新型标志物。

关键词：奶牛围产期酮病脂质组学 HPLC-MS/MS

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