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| 1 | Metamorphic Characteristics and Tectonic Implications of the Kadui Blueschist in the Central Yarlung Zangbo Suture Zone,Southern Tibet显示文摘The Kadui blueschist is located in the central section of Yarlung Zangbo suture zone(YZSZ), southern Tibet, and has been subjected to the subduction of the Neo-Tethyan Ocean below the Asian Plate and provides important clues for better understanding the evolution of the India-Asia convergence zone. In this paper, the systematical petrographic and mineral chemical studies were carried out on the Kadui blueschist, which reveal a mineral assemblage of sodic amphibole, chlorite, epidote, albite and quartz with accessory minerals of titanite, calcite and zircon. Electron microprobe analyses demonstrate that amphibole shows zoned from actinolite core to ferrowinchite/riebeckite rim composition indicating that the sodic amphibole has formed during a prograde metamorphic event. The protolith of the blueschist is an intermediate-basic pyroclastic rock. The calculated pseudosection indicates a clockwise P-T path and constrains peak metamorphic conditions of about 5.9 kbar at 345 ℃. This condition is transitional between pumpellyite-actinolite, greenschist and blueschist facies with a burial depth of 20–22 km and a thermal gradient of 15–16 ℃/km. This thermal gradient belongs to high pressure intermediate P/T facies series and is possibly related to a warm subduction setting of young oceanic slabs. Our new findings indicate that the Kadui blueschist in the central part of YZSZ experienced a rapid subduction and exhumation process as a response to a northward subduction of the Neo-Tethyan oceanic lithosphere during the initial India-Asia collision stage. | Guangming Sun Xu-Ping Li WenYong Duan Shuang Chen Zeli Wang Lingquan Zhao Qingda Feng | 2018 | Journal of Earth Science2018，29，5： | 12 |
| 2 | Metamorphic Evolution and Zircon U-Pb Ages of the Nanshankou Mafic High Pressure Granulites from the Jiaobei Terrane, North China Craton显示文摘Petrological analysis and LA-ICP-MS zircon U-Pb dating were conducted on high-pressure mafic granulites, which occured as xenolith within TTG gneisses, from the Nanshankou Village of the Jiaobei terrane, Shandong Peninsula in the north-eastern part of the North China Craton(NCC). The mafic HP granulite is composed of garnet, clinopyroxene, orthopyroxene, amphibole and symplectitic clinopyroxene, orthopyroxene, plagioclase, ilmente and magnetite which were formed after the decomposition of porphyroblastic garnet and clinopyroxene. Four stages of metamorphic mineral assemblages for the mafic HP granulites were constrained by detail petrological and mineralogical investigations. The early prograde assemblage is represented by the mineral inclusions within garnet and clinopyroxene porphyroblasts(Opx_1+Pl_1+Qtz_1), recording the metamorphic conditions at ~754–757 ℃, 0.63–0.71 GPa; peak metamorphic conditions were determined at ~874–891 ℃, 1.32–1.35 GPa with the mineral assemblage of Grt_2+Cpx_2+Amp_2+Pl_2+Qtz_2. Retrograde minerals derived from symplectitic assemblage Opx_3+Cpx_3+Amp_3+Pl_3+Qtz_3+Ilm_3±Mag_3 were formed at 693–796 ℃, 0.60–0.84 GPa. A final greenschist to sub-greenschist facies event was recorded by the exsolution of actinolite and albite within a retrograded clinopyroxene, as well as the occurrence of prehnite, chlorite and calcite minerals. Accordingly, a clockwise P-T path was concluded on the basis of the different stages of mineral asseblage. Cathodoluminescence imaging, trace element and U-Pb dating of zircons from the mafic HP granulites recorded similar charactistics for three episodes of Paleo–Meso Proterozoic metamorphic events. These are the metamorphic events preserved in mafic and pelitic granulites in the Jiao-Liao-Ji belt(JLJB) with ^(207)Pb/^(206)Pb ages of 2.0-1.9 Ga for peak metamorphism and of 1.86-1.84 Ga for decomposing process, followed by a retrograde amphibolite facies metamorphic event related to the post-orogenic extension at the age of 1.76-1.74 Ga, resulting the exhumation of the granulite to the upper crust level. | Shuang Chen Xu-Ping Li Fanmei Kong Qingda Feng | 2018 | Journal of Earth Science2018，29，5： | 12 |
| 3 | Distributed Flow Shop Scheduling with Sequence-Dependent Setup Times Using an Improved Iterated Greedy Algorithm显示文摘To meet the multi-cooperation production demand of enterprises,the distributed permutation flow shop scheduling problem(DPFSP)has become the frontier research in the field of manufacturing systems.In this paper,we investigate the DPFSP by minimizing a makespan criterion under the constraint of sequence-dependent setup times.To solve DPFSPs,significant developments of some metaheuristic algorithms are necessary.In this context,a simple and effective improved iterated greedy(NIG)algorithm is proposed to minimize makespan in DPFSPs.According to the features of DPFSPs,a two-stage local search based on single job swapping and job block swapping within the key factory is designed in the proposed algorithm.We compare the proposed algorithm with state-of-the-art algorithms,including the iterative greedy algorithm(2019),iterative greedy proposed by Ruiz and Pan(2019),discrete differential evolution algorithm(2018),discrete artificial bee colony(2018),and artificial chemical reaction optimization(2017).Simulation results show that NIG outperforms the compared algorithms. | Xue Han Yuyan Han Qingda Chen Junqing Li Hongyan Sang Yiping Liu Quanke Pan Yusuke Nojima | 2021 | Complex System Modeling and Simulation2021，1，3： | 4 |
| 4 | Pb(II) removal of Fe 3 O 4 @SiO 2 –NH 2 core–shell nanomaterials prepared via a controllable sol–gel process显示文摘 | Jianming Zhang Shangru Zhai Shi Li Zuoyi Xiao Yu Song Qingda An Ge Tian | 2013 | Chemical Engineering Journal2013，，： | 1 |
| 5 | Real-time identification of multiple nanoclusters with a protein nanopore in single-cluster level显示文摘It is important and challenging to analyze nanocluster structure with atomic precision.Herein,α-hemolysin nanopore was used to identify nanoclusters at the single molecule level by providing two-dimensional(2D)dwell time–current blockage spectra and translocation event frequency which sensitively depended on their structures.Nanoclusters such as Anderson,Keggin,Dawson,and a few lacunary Dawson polyoxometalates with very similar structures,even with only a two-atom difference,could be discriminated.This nanopore device could simultaneously measure multiple nanoclusters in a mixture qualitatively and quantitatively.Furthermore,molecular dynamics(MD)simulations provided microscopic understandings of the nanocluster translocation dynamics and yielded 2D dwell time–current blockage spectra in close agreement with experiments.The nanopore platform provides a novel powerful tool for nanocluster characterization. | Ling Zhang Peilei He Huang Chen Qingda Liu Libo Li Xun Wang Jinghong Li | 2024 | Nano Research2024，17，1： | 0 |
| 6 | Effects of formaldehyde on fermentable sugars production in the low-cost pretreatment of corn stalk based on ionic liquids显示文摘Low cost processing of lignocellulosic biomass is of great importance for sustainable chemistry and engineering.Herein,a low cost system composed of 1-butyl-3-methylimidazolium chloride([C_(4)C_(1) im]Cl),HCl and formaldehyde(FA)was developed for the pretreatment of corn stalk at 80℃.The efficiency of this technology was compared with that in dioxane system or without FA addition.Due to FA stabilization,the extent of acid-hydrolysis of carbohydrate fraction can be significantly decreased while 70%above of lignin was removed with the pretreatment of[C_(4)C_(1) im]Cl/HCl/FA system at 80℃for 2 h.A maximum reducing sugar yield of 93.7%and glucose concentration of 7.0 mg·ml^(-1) were subsequently obtained from enzymatic hydrolysis of the slurry.There were great differences in compositions of small molecule degraded products obtained with FA addition or not.The present[C_(4)C_(1) im]C_(l) based system exhibits great potential of substituting volatile organic solvents(i.e.dioxane)in developing low cost lignocellulosic biomass pretreatment at low temperature.Also,this work would gain insight into understanding on the roles of stabilization methods on the economic improvement of IL based biomass processing. | Kaili Zhang Ligang Wei Qingqin Sun Jian Sun Kunlan Li Shangru Zhai Qingda An Junwang Zhang | 2022 | Chinese Journal of Chemical Engineering2022，35，2： | 0 |
| 7 | Application of ASTLOF scoring system in the treatment of acute symptomatic thoracolumbar compression fractures显示文摘Background:Osteoporotic vertebral compression fracture(OVCF)is a common injury in the el-derly,often caused by low-energy injuries.Improper treatment will not only affect the stability and balance of the spine,but in severe cases will lead to neurological damage and inerease the risk of death.This retro-spective study aims to explore the principles of treatment of patients with the assessment system of thora-columbar osteoporotic fracture(ASTLOF)in acute symptomatic thoracolumbar compression fractures when the ASTLOF score=4 points.Methods:The clinical data of patients with acute symptomatic thoracolumbar compression fractures admitted from February 2018 to February 2020 were retrospectively analyzed.Each patient was evaluated according to the ASTLOF scoring system,and patients with ASTLOF score=4 were selected,a total of 108 patients.According to different treatment methods,they were divided into 32 cases in the non-surgical treatment(NST)group and 76 cases in the surgical treatment(ST)group.The visual analog score(VAS),Oswestry disability index(ODI),the recovery of injured vertebral body height,and the incidence of adjacent segment fractures were used for comprehensive evaluation.Results:During the follow-up,the VAS score and ODI score showed that the early pain relief and functional improvement of the surgical treatment group were better than those of the conservative treatment group(P<0.05);the Cobb angle of the surgical treatment group was 3 months and 6 months after the operation,and the vertebral body was injured.The degree of improvement of margin height was better than that of the conservative treatment group(all P<0.05);in the surgical treatment group,6 cases of adjacent vertebral fractures occurred after surgery,accounting for 7.89%,and 2 cases of the conservative treatment group had adjacent vertebral fractures,accounting for 6.25%There was no statistically significant difference between the two groups(P>0.05).Conclusions:When the ASTLOF scoring system is used in the treatment of acute symptomatic thoracolumbar compression fractures,patients with ASTLOF score=4 should be treated with surgery in time,which can re-lieve pain early and quickly,perform functional exercises as soon as possible,and reduce complications re-lated to long-term bed rest.Whether it increases the risk of adjacent vertebral fractures requires long-term follow-up studies in a large number of cases. | Li Qingda Yang Junsong Liu Tuanjiang He Baorong Zhang Xuefang Hao Dingjun | 2021 | 美中国际创伤杂志2021，20，1： | 0 |
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