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Impacts of landscape and climatic factors on snow cover in the Altai Mountains,china

Advances in Climate Change Research 2021年第1期12卷 95-107页

作者： ZHONG Xin-yue ZHANG Tingjun SU Hang XIAO Xiong-Xin WANG Shu-Fa HU Yuan-tao WANG Hui-Juan ZHENG Lei ZHANG Wei XU Min WANG Jian key laboratory of Remote Sensing of Gansu Province Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China key laboratory of Western china's Environmental Systems(Ministiy of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou730000China state key laboratory of Water {3.s and Hydropower Engineering Science Wuhan UniversityWuhan430072China School of Remote Sensing and Information Engineering Wuhan UniversityWuhan430072China Institute of Atmospheric Sciences Fudan UniversityShanghai200433China Gansu Tianshui Power Supply Company Tianshui741000China School of Geospatial Engineering and Science Sun Yat-Sen UniversityGuangzhou510275China state key laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China

Snow properties and their changes are crucial to better understanding of hydrological processes,soil thermal regimes,and surface energy *** data and information on snow depth and snow water equivalent(SWE)are also crucial for water resource assessments and socio-economic development at local and regional ***,these data are extremely limited and unreliable in northern Xinjiang,*** study thus aims to investigate spatial variations of snow depth,SWE,and snow density based on winter snowfield surveys during 2015 through 2017 in the Altai Mountains,northwestern *** results indicated that snow depth(25-114 cm)and SWE(40-290 mm)were greater in the alpine Kanas-Hemu region,and shallow snow accumulated(9-42 cm for snow depth,26-106 mm for SWE)on the piedmont sloping *** there was no remarkable regional difference in the distribution of snow *** property distributions were strongly controlled by topography and *** and latitude were the most important factors affecting snow depth and SWE,while snow density was strongly affected by longitude across the Altai Mountains in *** influence of topography on snow property distributions was spatially *** snow depth increased from 13.7 to 3..2 cm and SWE from 28.5 to 79.9 mm,respectively,with elevation increased from 400 to 1000 m *** the piedmont sloping *** depth decreased to about 15.1 cm and SWE to about 28.5 mm from 1000 to 1800 m a.s.l.,then again increased to about 98.1 cm and 271.7 mm on peaks(-2000 m a.s.l.)in the alpine *** slopes were easier to accumulate snow cover,especially on north-,east-,and southeast-facing *** interception was also the cause of the difference in snow *** depth,SWE,and snow density in forests were reduced by 8%-53.,2%-67%and-4%to+48%,respectively,compared with surrounding open *** when snow depth was less than 40 cm,snow depth and SWE differences in

关键词： Altai Mountains Snow cover Topography Vegetation Climate factor

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Hydrothermally stable mesoporous aluminosilicates as superior FCC catalyst:From laboratory to refinery

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petroleum Science 2023年第3期20卷 1903-1908页

作者： Hong-tao Liu Jiu-Jiang Wang Fang-Ming Xie Yun-Chuang Li Hai-Yan Li Hai-Yan Liu Yuan-Yuan yue Xiao-Tong Mi xiong-Hou Gao Hong-Hai Liu state key laboratory of Chemical {3. Engineering Beijing University of Chemical TechnologyBejing100029China Petrochemical Research Institute Petrochina Company LimitedBejing100195China state key laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing102249China national Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou UniversityFuzhouFujian350002China

Well-ordered aluminosilicates(MAs)were prepared by in-situ assembly of pre-crystallized units of zeolite Y precursors at a commercial scale,and applied in an industrial fluid catalytic cracking unit for the first *** with incumbent equilibrium catalyst,the surface area of trial equilibrium catalysts(3.%inventory ratio)increased from 110 m^(2)g^(-1)to 120m^(2)g^(-1).Moreover,a significant increase of the mesoporous surfaceareaof trial equlibrium catalysts(3.%inventoryrati)from 3. m g/to 40magi(22%increase).Furthermore,the equilibrium catalyst that contain 80%LPC-65 yields significantly lower heavy oil(0.23.)and higher total liquids(0.53.)compared with *** industrial results demonstrated excellent hydrothermal stability and superior catalytic cracking properties,showing the promising futurein the industrial units.

关键词： Mesoporous aluminosilicates Heavy oil Fluid catalytic cracking Industrial application

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预处理对菌接种餐厨垃圾发酵产乙酸的影响

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中国环境科学 2017年第5期37卷 1838-1843页

作者：李阳邓悦周涛赵由才同济大学污染控制与资源化研究国家重点实验室上海200092

探究了餐厨垃圾微氧发酵产挥发性脂肪酸(VFAs)的强化条件,即5种预处理方式(酸、碱、超声、热及热碱预处理)对餐厨垃圾接种酵母菌和醋酸菌后水解及产酸效果的影响.结果表明,预处理均有效提高了餐厨垃圾微氧发酵产VFAs及乙酸的性能,且产... 详细信息

探究了餐厨垃圾微氧发酵产挥发性脂肪酸(VFAs)的强化条件,即5种预处理方式(酸、碱、超声、热及热碱预处理)对餐厨垃圾接种酵母菌和醋酸菌后水解及产酸效果的影响.结果表明,预处理均有效提高了餐厨垃圾微氧发酵产VFAs及乙酸的性能,且产物组成并未发生改变.VFAs中乙酸、丙酸及丁酸分别约占81.81%~92.3.%、0.00%~7.48%及6.69%~17.3.%.其中,热碱预处理效果最好,在微氧发酵7d后,其发酵液中溶解性化学需氧量、VFAs产量、乙酸产量分别达到22.04、3..08和27.78g/L,较空白实验提高了46.54%、54.3.%及77.06%,极大地加快了微氧发酵过程.

关键词：餐厨垃圾预处理酵母菌醋酸菌微氧发酵乙酸

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Mechanism of microwave assisted suspension magnetization roasting of oolitic hematite ore

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Journal of Central South university 2022年第2期29卷 420-432页

作者： ZHOU Wen-tao SUN Yong-sheng HAN yue-xin GAO Peng LI Yan-jun College of Chemical and Biological Engineering Shandong University of Science and TechnologyQingdao 266590China School of resources and Civil Engineering Northeastern UniversityShenyang 110819China National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore resources Shenyang 110819China state key laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

Oolitic hematite is an iron ore resource with rich reserves,complex composition,low grade,fine disseminated particle sizes,and a unique oolitic *** this study,a microwave-assisted suspension magnetization roasting technology was proposed to recover and utilize the *** results showed that under the conditions of microwave pretreatment temperature of 1050℃ for 2 min,a magnetic concentrate with an iron grade of 58.72%at a recovery of 89.3.%was obtained by microwave suspension magnetization roasting and magnetic ***,compared with the no microwave pretreatment case,the iron grade and recovery increased by 3.17%and 1.58%,*** pretreatment increased the saturation magnetization of the roasted products from 24.974 to 3..23.(A∙m^(2))/kg and the saturation susceptibility from 0.179×10^(−3. m^(3./kg to 0.283.10^(−3. m^(3./*** were formed between the iron and gangue minerals,and they gradually extended to the core of oolite with the increase in the pretreatment *** reducing gas diffused from outside to inside along the microcracks,which promoted the selective transformation of the weak magnetic hematite into the strong magnetic magnetite.

关键词： oolitic hematite microwave suspension magnetization roasting phase and magnetic transformation microstructure evolution

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Simulation experiments on the reaction system of CH_4-MgSO_4-H_2O

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Chinese Science Bulletin 2008年第7期53卷 1071-1078页

作者： DING KangLe LI ShuYuan yue Changtao ZHONG NingNing state key laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China Faculty of Natural resource and Information Technology China University of Petroleum Beijing 102249 China

H2S-rich gas in carbonate reservoirs is usually attributed to thermochemical sulfate reduction (TSR). In this paper, thermal simulation experiments on the reaction system of CH4-MgSO4-H2O were carried out using autoclave at 425℃―525℃. The threshold temperature for initiating TSR is much lower than our previous studies (550 ℃ ). Properties of the reaction products were analyzed by microcoulometry, gas-chromatography (GC), Fourier transform-infrared spectrometry (FT-IR) and X-ray diffraction (XRD) methods. Thermodynamics and reaction kinetics of TSR processes were investigated on the basis of the experimental data. The results show that thermochemical reduction of magnesium sulfate with methane can proceed spontaneously to produce magnesium oxide, hydrogen sulfur, and carbon diox-ide as the main products, and high temperature is thermodynamically favorable to the reaction. Ac-cording to the reaction model, the calculated activation energy of TSR is 101.894 kJ/mol, which is lower than that by most previous studies. Mg2+ may have played a role of catalytic action in the process of TSR. The elementary steps of TSR and reaction mechanism were discussed tentatively. The study can provide important information on the explanation of geochemical depth limit for natural gas and on the generation of high H2S gas in deep carbonates reservoirs.

关键词：反作用系统 TSR 热化学化学反应

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基于Ugi多组分反应的赖氨酸与糠醛的直接聚合

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高分子学报 2020年第7期51卷 738-743,I0004页

作者：陶月陈金龙王士学陶友华中国科学院长春应用化学研究所中国科学院生态环境高分子材料重点实验室长春130022 中国科学技术大学应用化学与工程学院合肥230026

报道了基于Ugi多组分反应的Nα-叔丁氧羰基-L-赖氨酸、糠醛与叔丁基异腈的聚合.聚合条件温和,无需使用催化剂,且所得聚合物的相对数均分子量Mn最高可达10.0 kg/mol.特别是,聚合在水中也可顺利进行,可以避免有毒溶剂的使用,符合绿色化学... 详细信息

报道了基于Ugi多组分反应的Nα-叔丁氧羰基-L-赖氨酸、糠醛与叔丁基异腈的聚合.聚合条件温和,无需使用催化剂,且所得聚合物的相对数均分子量Mn最高可达10.0 kg/mol.特别是,聚合在水中也可顺利进行,可以避免有毒溶剂的使用,符合绿色化学发展理念.核磁共振氢谱(1H-NMR)、核磁共振碳谱(13.-NMR)及基质辅助激光解吸电离飞行时间质谱(MALDI-TOF-MS)的结果证实所得聚合物具有类肽的结构.在此基础上,推测Nα-叔丁氧羰基-L-赖氨酸、糠醛与叔丁基异腈的聚合符合Ugi反应的一般机理,即糠醛首先与氨基缩合形成亚胺,再经过两次的亲核加成、Mumm重排以及酰基转移反应,最终形成具有类肽结构的聚合物.DSC测试结果表明聚合物玻璃化转变温度(Tg)为116°C,无明显熔点.所获得的聚合物在生物降解材料及生物医用材料等领域具有潜在的应用价值,这为赖氨酸和糠醛的直接聚合以及可再生资源的高附加值利用开辟了一条新路径.

关键词： Ugi多组分反应赖氨酸糠醛可再生资源

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Constraints of (U-Th)/He ages on early Paleozoic tectonothermal evolution of the Tarim Basin,china

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Science china Earth Sciences 2010年第7期53卷 964-976页

作者： QIU NanSheng WANG JiYang MEI QingHua JIANG Guang tao Cheng state key laboratory of {3. resource and prospecting China University of PetroleumBeijing 102249China Basin and Reservoir Research Center China University of PetroleumBeijing 102249China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China Wuxi Research Institute of petroleum Geology SINOPECWuxi 214151China

The thermal evolution of source rocks in the Paleozoic stratigraphic sequences has been an outstanding problem for petroleum exploration in the Tarim Basin, as the thermal history of the Paleozoic could not be reconstructed objectively due to the lack of effective thermal indicators in the early Paleozoic carbonate successions. The (U-Th)/He thermochronometry of apatite and zircon has recently been used as an effective tool to study the structural uplift and thermal history of sedimentary basins. The Paleozoic tectonothermal histories of two typical wells in the Tarim Basin were modeled using the thermal indicators of (U-Th)/He, apatite fission track (AFT), and vitrinite reflectance (Ro) data in this paper. The Paleozoic strata in the two wells were shallow due to persistent uplift and significant erosion during the Hercynian tectonic events (from Devonian to Triassic). Therefore, the paleothermal indicators in the Paleozoic strata may retain the original thermal evolution and can be used to re- construct the Paleozoic thermal history of the Tarim Basin. The apatite and zircon helium ages from core and cuttings samples were analyzed and the Paleozoic thermal histories of wells KQ1 and T1 were modeled by combining helium ages, AFT, and equivalence vitrinite reflectance (VRo) data. The modeling results show that the geothermal gradient evolution is different in the Kongquehe Slop and Bachu Uplift of Tarim Basin during the Paleozoic. The thermal gradient in Well T1 on the Bachu Up- lift was only 28–3.°C/km in Cambrian, and it increased to 3.–3.°C/km in Ordovician and 3.–3.°C/km during the Silurian and Devonian. The thermal gradient of Ordovician in Well KQ1 on the Kongquehe Slope was 3.°C/km and decreased to 3.–3.°C/km during the Silurian and Devonian. Therefore, the combined use of (U-Th)/He ages and other thermal indicators appears to be useful in reconstructing the basin thermal history and provides new insight into the understanding of the early Paleozoic thermal h

关键词： (U-Th)/He ages tectonothermal evolution Tarim Basin apatite fission track equivalence vitrinite reflectance

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Impaired function of the suprachiasmatic nucleus rescues the loss of body temperature homeostasis caused by time-restricted feeding

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Science Bulletin 2020年第15期65卷 1268-1280,M0003,M0004页

作者： Zhihui Zhang Qiaocheng Zhai yue Gu tao Zhang Zhengyun Huang Zhiwei Liu Yi Liu Ying Xu Model Animal Research Center Nanjing UniversityNanjing 210061China Jiangsu key laboratory of Neuropsychiatric Diseases and Cambridge-Suda Genomic resource Center Soochow UniversitySuzhou 215123China Department of Physiology University of Texas Southwestern Medical CenterDallasTX 75390USA state key laboratory of Radiation Medicine and Protection Soochow UniversitySuzhou 215123China

The suprachiasmatic nucleus(SCN)is the master circadian pacemaker that drives body temperature ***-restricted feeding(TRF)has potential as a preventative or therapeutic approach against many *** potential side effects of TRF remain *** we show that daily 4-h TRF treatment in mice can severely impair body temperature homeostasis and can result in *** half of the mice died at 21℃,and all mice died at 18℃during 4-h *** effect was modulated by the circadian clock and was associated with severe hypothermia due to loss of body temperature ***,disrupting the circadian clock by SCN lesions or constant light rescued lethality during *** of circadian gene expression in the dorsomedial hypothalamus(DMH)demonstrated that TRF reprograms rhythmic transcriptome in DMH and suppresses expression of genes,such as Ccr5 and Calcrl,which are involved in ***,our results demonstrated a potent effect of TRF on body temperature homeostasis and the role of SCN function in this *** results further suggested that circadian arrhythmicity can have potential beneficial effects under certain stress conditions.

关键词： Time-restricted feeding Body temperature Hypothermia Circadian clock The suprachiasmatic nucleus The dorsomedial hypothalamus

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沉积盆地古水深恢复方法与研究进展

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沉积与特提斯地质 2024年第3期44卷 582-599页

作者：张涛王琳霖廖慧鸿邹敏梁茹王鹏苏中堂中国石化石油勘探开发研究院北京100083 成都理工大学沉积地质研究院四川成都610059 中国石化中原油田分公司物探研究院河南濮阳457001 油气藏地质及开发工程国家重点实验室成都理工大学四川成都610059 自然资源部深时地理环境重建与应用重点实验室成都理工大学四川成都610059

古水深分析对古环境重建、盆地分析、层序地层学研究、古地貌恢复以及生、储、盖层条件的评价都有重要意义。古水深分析通常有古生物法、沉积学法、地球物理法、地球化学法及数字模拟法,各种方法优缺点并存,尽管某些方法在特定地质条件... 详细信息

古水深分析对古环境重建、盆地分析、层序地层学研究、古地貌恢复以及生、储、盖层条件的评价都有重要意义。古水深分析通常有古生物法、沉积学法、地球物理法、地球化学法及数字模拟法,各种方法优缺点并存,尽管某些方法在特定地质条件下存在优势,但在恢复同一环境的古水深时,不同方法还是存在其偏差;这些方法多以定性为主,许多方法易受自然条件限制,且对样品可靠性要求高,一定程度上限制了古水深研究。古水深恢复建议综合考虑地质背景、环境演化、研究地质体特征及地质资料情况等多种因素,多方法研究相互约束,以期更客观地再现古水深变化规律。

关键词：古水深层序地层古生物方法沉积学方法地球化学法数字模拟法

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二阶智能体的分布式非光滑资源分配算法

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控制与决策 2023年第5期38卷 1336-1344页

作者：时侠圣孙佳月徐磊杨涛安徽大学人工智能学院合肥230601 大连理工大学工业装备智能控制与优化教育部重点实验室辽宁大连116024 东北大学流程工业综合自动化国家重点实验室沈阳110004

分布式资源分配问题旨在满足局部约束下完成一定量资源分配的同时使全局成本函数最小.首先,针对无向连通网络下二阶积分器型线性智能体系统,结合Karush-Kuhn-Tucker条件,提出一种初始值任意的分布式优化算法,其中,全局等式约束对偶变量... 详细信息

分布式资源分配问题旨在满足局部约束下完成一定量资源分配的同时使全局成本函数最小.首先,针对无向连通网络下二阶积分器型线性智能体系统,结合Karush-Kuhn-Tucker条件,提出一种初始值任意的分布式优化算法,其中,全局等式约束对偶变量实现比例积分控制,局部凸函数不等式约束对偶变量实现自动获取.当全局成本函数为非光滑凸函数时,借助集值LaSalle不变性原理理论证明所提出算法渐近收敛到全局最优解.其次,将所提出算法推广至无向连通网络下参数未知的Euler-Lagrange多智能体系统.当全局成本函数为非光滑凸函数时,借助Barbalat引理理论证明所提出算法渐近收敛到全局最优解.最后,通过数值仿真验证了所提算法的有效性.

关键词：自适应初始值任意非光滑资源分配二阶系统

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