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Chemical Research in Chinese Universities 1992年第4期8卷 405-409页

作者： wang Jian-ji, LIU xin-hua and wang Xi-gui (Department of Chemistry, Inner Mengoulia Normal University, Huhehaote, 010022)

By using Polya' s theorem, the generating functions of configurations, chiral and achi-ral configurations of saturated polybasic alcohols containing an adamantane skeleton were obtained. Tn order to calculate the generating functions of compounds which are substituted with a limited condition, an exclusive method is used and cycle index is modified.

关键词： Enumeration Adamantane skeleton Alcohol

Enhanced dehydrogenation kinetic properties and hydrogen storage reversibility of LiBH_4 confined in activated charcoal

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Transactions of Nonferrous Metals Society of China 2018年第8期28卷 1618-1625页

作者： He ZHOU Hai-zhen LIU Shi-chao GAO xin-hua wang State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Advanced Transmission Technology Global Energy Interconnection Research InstituteState Grid Corporation of ChinaBeijing 102209China

LiBH4 was confined into activated charcoal（AC） by melt infiltration method（MI）, and its effects on the hydrogen sorption properties were investigated. The N2 adsorption results reveal that melt infiltration method can effectively incorporated LiBH4 into AC. It can maintain the structural integrity of the scaffold and ensure the confinement effect. The nano-confined LiBH4/AC starts to release hydrogen at around 190 °C, which is 160 °C lower than that of pure LiBH4, and reaches a hydrogen desorption capacity of 13.6% at 400 °C. When rehydrogenated under the condition of 6 MPa H2 and 350 °C, it has a reversible hydrogen storage capacity of 6%, while pure LiBH4 shows almost no reversible hydrogen storage capacity under the same condition. Mass spectrometry analysis（MS） results suggest that no diborane or other impurity gases are released in the decomposition process. The apparent activation energy of dehydrogenation of LiBH4 after confinement into AC decreases from 156.0 to 121.1 k J/mol, which leads to the eminent enhancement of dehydrogenation kinetics of LiBH4.

关键词： hydrogen storage materials hydrogen storage properties lithium borohydride activated charcoal melt infiltration

Resting-state brain network remodeling after different nerve reconstruction surgeries:a functional magnetic resonance imaging study in brachial plexus injury rats

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Neural Regeneration Research 2025年第5期20卷 1495-1504页

作者： Yunting Xiang Xiangxin xing Xuyun hua Yuwen Zhang xin Xue Jiajia Wu Mouxiong Zheng He wang Jianguang Xu School of Rehabilitation Science Shanghai University of Traditional Chinese MedicineShanghaiChina Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation Ministry of EducationShanghaiChina Department of Rehabilitation Medicine Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina Department of Traumatology and Orthopedics Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghaiChina Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence(Fudan University) Ministry of EducationShanghaiChina Human Phenome Institute Fudan UniversityShanghaiChina

Distinct brain remodeling has been found after different nerve reconstruction strategies,including motor representation of the affected ***,differences among reconstruction strategies at the brain network level have not been *** study aimed to explore intranetwork changes related to altered peripheral neural pathways after different nerve reconstruction surgeries,including nerve repair,endto-end nerve transfer,and end-to-side nerve ***–Dawley rats underwent complete left brachial plexus transection and were divided into four equal groups of eight:no nerve repair,grafted nerve repair,phrenic nerve end-to-end transfer,and end-to-side transfer with a graft sutured to the anterior upper ***-state brain functional magnetic resonance imaging was obtained 7 months after *** independent component analysis algorithm was utilized to identify group-level network components of interest and extract resting-state functional connectivity values of each voxel within the *** in intra-network resting-state functional connectivity were compared among the *** muscle reinnervation was assessed by behavioral observation(elbow flexion)and *** results showed that alterations in the sensorimotor and interoception networks were mostly related to changes in the peripheral neural *** repair was related to enhanced connectivity within the sensorimotor network,while end-to-side nerve transfer might be more beneficial for restoring control over the affected limb by the original motor *** thalamic-cortical pathway was enhanced within the interoception network after nerve repair and end-to-end nerve *** areas related to cognition and emotion were enhanced after end-to-side nerve *** study revealed important brain networks related to different nerve *** networks may be potential targets for enhancing motor recovery.

关键词： brain functional networks end-to-end nerve transfer end-to-side nerve transfer independent component analysis nerve repair peripheral plexus injury resting-state functional connectivity

Influencing Factors on Center Segregation in Continuously Cast Pipeline Steel Slabs

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Journal of Iron and Steel Research International 2011年第S2期18卷 352-357页

作者： LIU Yang1, wang xin-hua2, wang Wen-jun1, JIANG Zhong-hang1 (1.Shougang Research Institute of Technology Beijing 100043 china 2.University of Science and Technology Beijing 100083, China) Shougang Res Inst Technol Beijing Beijing 100043 Peoples R China Univ Sci & Technol Beijing Beijing 100083 Peoples R China

The factors which influence center segregation of continuously cast slabs are obtained through analyzing the database of macrostructrue. It indicates that center segregation becomes severer with the increasing content of carbon, phosphorus and sulfur; Center segregation will be reduced obviously if the content of manganese is higher than 1.5% and the ratio of Mn/S is higher than 300; High degree of superheat , high casting speed and increasing width of slabs will increase the degree of center segregation. Since center segregation below class B has little effect on the property of steel, hence, in order to low the ratio of center segregation of class B-1.0 down to 10%, several control strategies are presented as follows: the contents of carbon, phosphorus and sulfur must be focalized in lower range of steel grade demanded, but manganese upper operating range control. The referenced contents of the elements in molten steel are required like this: [C]1.5%,[Mn]/[S]>300; The degree of superheat should be lower than 24℃ and the casting speed should be defined to 1.0-1.1 m·min-1. At the same time, proper secondary cooling system of water distribution should be developed and the precision of continuous caster should be also improved.

关键词： continuous casting slab, center segregation, microalloy steel

Ti_(3)AICN MAX for tailoring MgH_(2) hydrogen storage material:from performance to mechanism

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Rare Metals 2023年第6期42卷 1923-1934页

作者： xing-Qing Duan Guang-Xu Li Wen-Hui Zhang Hui Luo Hai-Mei Tang Li Xu Peng Sheng xin-hua wang Xian-Tun huang Cun-Ke huang Zhi-Qiang Lan Wen-Zheng Zhou Jin Guo Mohammd Bin Ismail Hai-Zhen Liu Guangxi Novel Battery Materials Research Center of Engineering Technology Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related TechnologySchool of Physical Science and TechnologyGuangxi UniversityNanning530004China State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co.Ltd.Beijing102209China Department of Materials Science and Engineering Zhejiang UniversityHangzhou310027China Department of Materials Science and Engineering Baise CollegeBaise533000China Energy Storage Research Group Faculty of Ocean Engineering Technology and InformaticsUniversiti Malaysia TerengganuKuala Nerus21030Malaysia

Many MXenes are efficient catalysts for MgH_(2)hydrogen storage ***,the synthesis of MXenes should consume a large amount of corrosive HF to etch out the Al layers from the transition metal aluminum carbides or nitrides(MAX) phases,which is environmentally *** this work,Ti_(3)AlCN MAX without HFetching was employed directly to observably enhance the kinetics and the cycling stability of MgH_(2).With addition of10 wt% Ti_(3)AlCN,the onset dehydrogenation temperature of MgH2 was dropped from 320 to 205℃,and the rehydrogenation of MgH2 under 6 MPa H2 began at as low as50℃.Furthermore,at 300℃,it could provide 6.2 wt% of hydrogen in 10 *** cycling,the composite underwent an activation process during the initial 40 cycles,with the reversible capacity increased from 4.7 wt% to 6.5 wt%.After that,the capacity showed almost no attenuation for up to 100 *** enhancing effect of Ti_(3)AICN on MgH_(2) was comparable to many *** was demonstrated that Ti_(3)AICN did not destabilize MgH_(2) but acted as an efficient catalyst for MgH_(2).Ti_(3)AICN was observed to be the active sites for the nucleation and growth of MgH_(2)and might also help in dissociation and recombination of hydrogen *** two factors are believed to contribute to the improvement of MgH_(2).This study not only provides a promising strategy for improving the hydrogen storage performances of MgH_(2) by using noncorrosive MAX materials,but also adds evidence of nucleation and growth of MgH_(2) on a catalyst.

关键词： Hydrogen storage Magnesium hydride MAX MXene Titanium aluminum carbonitride

AN EXPERIMENTAL INVESTIGATION OF SLOW GROUP VELOCITIES IN A PHONONIC CRYSTAL BEAM WITH A POINT DEFECT

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AN EXPERIMENTAL INVESTIGATION OF SLOW GROUP VELOCITIES IN A ...

2016年全国压电和声波理论及器件应用研讨会

作者： Kuo-chih ChuaNG Zhi-qiang ZHANG hua-xin wang Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province School of Aeronautics and Astronautics Institute of Applied Mechanics Zhejiang University

Background, Motivation and Objective Phononic crystals(PCs) have gained much attention for their potential applications in vibration suppression, sound insulation, filters, and so on. Apart from the phenomena of band gaps, existence of the crystal defects makes confinement of elastic waves in a localized mode possible. When the periodicity of the lattice is broken by the defects, localized resonance peaks can occur inside the band gaps. Various wave-manipulation devices can be designed through the introductions of the defect modes(e.g., frequency filters, couplers, focusing devices, etc). Here we experimentally investigate influences of the point defect modes on the propagations of flexural waves in a PC Timoshenko beam. Statement of Contribution/Methods In this work, the dispersion curves and the group velocities around the defect modes are theoretically obtained by the transfer matrix method with a supercell technique. In order to demonstrate the existence of the localized defect modes inside the band gaps, we set up a high-sensitivity fiber Bragg grating(FBG) sensing system and measure the displacement transmittance of the PC beam. Hanning windowed tone burst excitations are generated through a multilayered piezoelectric actuator and the transient elastic waves are then measured by the FBG sensing system. Results We show that the proposed FBG sensing system is able to obtain point-wise input and output displacements at the two ends of the PC beam for the obtainment of the displacement transmittance. In addition, we experimentally demonstrate that flexural waves propagate with slow group velocities around the defect modes. Discussion and Conclusions In conclusion, we have investigated the transmission properties of a PC Timoshenko beam with a point defect. The defect mode is existed inside the band gaps, validated theoretically by the transfer matrix theory with a supercell technique and experimentally by the proposed FBG displacement sensing system. The slow grou

关键词： Phononic crystal beam Group velocity Defect mode Fiber Bragg grating(FBGs)

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超大采高工作面液压支架与围岩耦合作用关系

煤炭学报 2017年第2期42卷 518-526页

作者：王国法庞义辉李明忠马英刘新华天地科技股份有限公司开采设计事业部北京100013 煤炭科学研究总院开采研究分院北京100013

针对金鸡滩煤矿坚硬厚煤层赋存条件,提出了8.2 m超大采高一次采全厚开采方法,分析了超大采高工作面液压支架与围岩的强度、刚度、稳定性耦合关系及控制方法,研制了ZY21000/38/82D型超大采高液压支架及新结构。基于液压支架与围岩耦合作... 详细信息

针对金鸡滩煤矿坚硬厚煤层赋存条件,提出了8.2 m超大采高一次采全厚开采方法,分析了超大采高工作面液压支架与围岩的强度、刚度、稳定性耦合关系及控制方法,研制了ZY21000/38/82D型超大采高液压支架及新结构。基于液压支架与围岩耦合作用关系,采用理论分析与数值模拟方法研究了超大采高液压支架合理工作阻力确定的"双因素"控制法;通过建立脆性坚硬厚煤层煤壁片帮的"拉裂-滑移"力学模型,得出了控制煤壁片帮发生滑移失稳的液压支架临界护帮力;分析了销轴铰接间隙对超大采高液压支架稳定性的影响及控制方法。通过创新研制大缸径抗冲击双伸缩立柱、三级协动护帮装置等新结构,保证了超大采高液压支架与围岩系统的稳定性控制。

关键词： 8.2m超大采高综采支架与围岩耦合关系工作阻力煤壁片帮稳定性控制

Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-Yan huang Yi-De Zhang Jie Chen Hai-Di Fan Wan wang Bin wang Ju-Yun Ma Peng-Peng Li Hai-Wei Pu xin-Yian Guo Jian-Gang Shen Su-hua Qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

Facile synthesis of the dodecahydridododecaborate (B12H122-) from borane Lewis base adducts

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Science China Chemistry 2025年

作者： Yi Jing xin-Ran Liu xing-hua wang Hui Han Sha-Sha Liang Xi-Meng Chen Dong-Hui Wei Lai-Sheng wang Xue-Nian Chen College of Chemistry Zhengzhou University School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced MaterialsHenan Normal University Department of Chemistry Brown University

Polyhedral boranes are a class of well-known boron molecular clusters widely used in energy,chemistry,medicine,and materials science because of their unique physical and chemical *** efforts have been made in the past decades to find more effective synthetic methods for this important class of boron ***,existing synthetic methods suffer from low efficiency and low ***,we report a facile one-pot synthesis of[（CH3）3S]2B12H12with moderate yields at mild *** mechanisms for the multi-step chemoselective synthesis of B12H122-without other by-products are elucidated based on theoretical results and our previous *** Lewis base used in B–H bond condensation reaction,which acts as a hydrogen or to balance the newly generated polyhedral borane charges,is proposed and studied in *** current study has led to a more effective and selective synthetic method for B12H122-and has also implicated the syntheses of other new polyhedral boranes.

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Investigation on novel pharmacological target against pulmonary hypertension

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Investigation on novel pharmacological target against pulmon...