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Crystal　Structures　of　O－Vanillin－semicarbazide　and　Salicylaldehyde－semicarbazide

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Chinese Journal of Structural Chemistry 1995年第2期14卷 88-93页

作者： Li Shu-Lan Liu De-Xin Zhou Jian-Hua meng fan-qin(Department of Chemistry, Shandong University, Jinan, 250100)

o-Vanillin-semicarbazide C_9H_(11) N_3O_3, written simply as cpl, M_r= 209. 21 is a yellow crystal. Cp1 crystallizes in the monoclinic space group P2_1/a with unit cell parameters: a= 6. 596(6) , b=20. 534(6) , c=7. 108(6) , β=99.00(8)°,Z=4, D_c=1. 46 g/cm￣3, V=951 , μ=1. 05cm￣(-1), F(000)=440, R=0. 058, R_w =0. 056. Salicylaldehyde-semicarbazide C_8H_9N_3O_2, written simply as cp2, M_r=179.18 is a colorless crystal. cp2 crystallizes in the triclinic space group P1 with a= 5.276 (3), b=7. 116(4) , c=24. 286(3), a=86. 72(3) ,β=83. 99(3),γ=68.22(5) °,Z=4 , D_c=1. 41 g/cm￣3, V=841.9,μ=0. 98 cm ￣(-1),F (000)=376, R=0.066,R_w= 0. 067. The dihedral angle between plane 1 formed by benzene ring and plane 2 by N(2) , C(2), N(3), and O(3) is 161.40°for cp1, while the angle between plane 3 made by benzene ring (or benzene ring in the other molecule)and plane 4 by N(2) , C (18) , N(3) and O(3) For N(5),C(28) , O(4) , and N(6)]is 15. 07°(or 15. 15°) for cp2. The temperature of the thermodecomposition of cp1 is higher than that of cp2.

关键词： crystal structure o-vanillin-semicarbazide salicylaldehyde-semicarbazide

Sex differences in human pre-gastrulation embryos

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Science China(Life Sciences) 2025年第2期68卷 397-415页

作者： Yongjie Lu meng qin Xintong Qi Ming Yang fan Zhai Jiaqi Zhang Zhiqiang Yan Liying Yan Jie Qiao Peng Yuan State Key Laboratory of Female Fertility Promotion Center for Reproductive MedicineDepartment of Obstetrics and GynecologyPeking University Third HospitalBeijing 100191China National Clinical Research Center for Obstetrics and Gynecology(Peking University Third Hospital) Beijing 100191China Key Laboratory of Assisted Reproduction(Peking University) Ministry of EducationBeijing 100191China Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology Beijing 100191China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China

Human fetuses exhibit notable sex differences in growth rate and response to the intrauterine environment,yet their origins and underlying mechanisms remain ***,we conduct a detailed investigation of sex differences in human pre-gastrulation *** lower methylation and incomplete inactivation of the X chromosome in females,as well as the sex-specific cell-cell communication patterns,contribute to sex-differential *** trophectoderm is more inclined toward syncytiotrophoblast differentiation and exhibits a stronger hormone secretion capacity,while female trophectoderm tends to retain cytotrophoblast program with stronger mitochondrial function as well as higher vasculogenesis and immunotolerance *** primitive endoderm initiates the anterior visceral endoderm transcriptional program earlier than *** cell cycle activities of the epiblast and primitive endoderm are higher in males compared to females,while the situation is opposite in the *** conclusion,our study provides in-depth insights into the sex differences in human pre-gastrulation embryos and contributes to unraveling the origins of the sex differences in human fetal development.

关键词： human embryo sex difference trophectoderm primitive endoderm epiblast

Synthesis，Crystal　Structure　and　Thermode－composition　Kinetics　of　Copper（Ⅱ）　Complex　with　bis－（Schiffbase）　Derived　from　3－Methoxysalicylaldehyde　and　Ethanolamine

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Chemical Research in Chinese Universities 1994年第4期10卷 273-279页

作者： LI Shu-lan WANG Hong LIU De-xin and meng fan-qin(Departnient of Chemistry, Shandong University, Jinan, 250100)YANG Zhao-he(National Laboratory of Ciystal Materials, Shandong University,Jinan, 250100 )(

he present paper covers the synthesis,crystal structure and thermodecom-position kinetics of bis [(3-methoxysalicylal )-ethanolamine] copper (Ⅱ) complex.X-ray diffraction determination gave the following crystal data: triclinic *** group P1,Z=2.a = 0. 884 1 ( 4 ) .b =1.0773 (2), c = 1 . 1 32 1 (3) nm . α=70. 38(1),β= 70.70(2).γ=78.29 ( 2)°.The final agreement factors were R =0. 075, R_w= 0. 067, *** on non-isothermal kinetics of thecomplex favored second order kinetics. The kinetic equation is expressed as: da/dt= A × e ￣(-E/RT)×(1 -α)￣2 .

关键词： Synthesis Crystal structure.Thermodecomposition kinetics

Effects of aggregate size distribution and carbon nanotubes on the mechanical properties of cemented gangue backfill samples under true triaxial compression

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 311-324页

作者： Qian Yin fan Wen Zhigang Tao Hai Pu Tianci Deng Yaoyao meng qingbin meng Hongwen Jing Bo meng Jiangyu Wu State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China Key Laboratory of Xinjiang Coal Resources Green Mining Ministry of EducationXinjiang Institute of EngineeringUrumqi 830023China

The mechanical behavior of cemented gangue backfill materials(CGBMs)is closely related to particle size distribution(PSD)of aggregates and properties of cementitious ***,the true triaxial compression tests,CT scanning,SEM,and EDS tests were conducted on cemented gangue backfill samples(CGBSs)with various carbon nanotube concentrations(P_(CNT))that satisfied fractal theory for the PSD of *** mechanical properties,energy dissipations,and failure mechanisms of the CGBSs under true triaxial compression were systematically *** results indicate that appropriate carbon nanotubes(CNTs)effectively enhance the mechanical properties and energy dissipations of CGBSs through micropore filling and microcrack bridging,and the optimal effect appears at P_(CNT)of 0.08wt%.Taking PSD fractal dimension(D)of 2.500 as an example,compared to that of CGBS without CNT,the peak strength(σ_(p)),axial peak strain(ε_(1,p)),elastic strain energy(Ue),and dissipated energy(U_(d))increased by 12.76%,29.60%,19.05%,and90.39%,***,excessive CNTs can reduce the mechanical properties of CGBSs due to CNT agglomeration,manifesting a decrease inρ_(p),ε_(1,p),and the volumetric strain increment(Δε_(v))when P_(CNT)increases from 0.08wt%to 0.12wt%.Moreover,the addition of CNTs improved the integrity of CGBS after macroscopic failure,and crack extension in CGBSs appeared in two modes:detour and pass through the ***σ_(p)and U_(d)firstly increase and then decrease with increasing D,and porosity shows the opposite ***ε_(1,p)andΔε_(v)are negatively correlated with D,and CGBS with D=2.150 has the maximum deformation parameters(ε_(1,p)=0.05079,Δε_(v)=0.01990)due to the frictional slip effect caused by coarse *** increasing D,the failure modes of CGBSs are sequentially manifested as oblique shear failure,"Y-shaped"shear failure,and conjugate shear failure.

关键词： cemented gangue backfill materials particle size distribution true triaxial compression test carbon nanotubes mechanical properties failure modes

Adaptive VDI Session Placement via User Logoff Prediction

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Machine Intelligence Research 2025年第1期22卷 189-200页

作者： Wenping fan Puhui meng Yu Tian Min-Ling Zhang Yao Zhang School of Computer Science and Engineering Southeast UniversityNanjing210096China VMware Information Technology(China)Limited Beijing100190China Key Laboratory of Computer Network and Information Integration(Southeast University) Ministry of EducationNanjing210096China

After the global pandemic,DaaS(desktop as a service)has become the first choice of many companies’remote working *** the desktops are usually deployed in the public cloud when using DaaS,customers are more cost-sensitive which boosts the requirement of proactive power *** researches in this area focus on virtual desktop infrastructure(VDI)session logon behavior modeling,but for the remote desktop service host(RDSH)-shared desktop pools,logoff optimization is also *** systems place sessions by round-robin or in a pre-defined order without considering their logoff ***,these approaches usually suffer from the situation that few left sessions prevent RDSH servers from being powered-off which introduces cost *** this paper,we propose session placement via adaptive user logoff prediction(SODA),an innovative compound model towards proactive RDSH session ***,an ensemble machine learning model that can predict session logoff time is combined with a statistical session placement bucket model to place RDSH sessions with similar logoff time in a more centralized manner on RDSH ***,the infrastructure cost-saving can be improved by reducing the resource waste introduced by those RDSH hosts with very few hanging sessions left for a long *** on real RDSH pool data demonstrate the effectiveness of the proposed proactive session placement approach against existing static placement techniques.

关键词： Virtual desktop infrastructure(VDI)resource management remote desktop service logoff prediction adaptive modeling session placement

Deep Synchronization Control of Grid-Forming Converters:A Reinforcement Learning Approach

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 273-275页

作者： Zhuorui Wu meng Zhang Bo fan Yang Shi Xiaohong Guan the School of Cyber Science and Engineering Xi'an Jiaotong University the Department of Mechanical Engineering University of Victoria

Dear Editor,This letter proposes a deep synchronization control(DSC) method to synchronize grid-forming converters with power grids. The method involves constructing a novel controller for grid-forming converters based on the stable deep dynamics model. To enhance the performance of the controller, the dynamics model is optimized within the deep reinforcement learning(DRL) framework. Simulation results verify that the proposed method can reduce frequency deviation and improve active power responses.

关键词： Deep reinforcement learning

Impact of Skin Temperature Control Variable on the Assimilation of Microwave Temperature-sounding Channels in Regional Numerical Weather Prediction

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Advances in Atmospheric Sciences 2025年第3期42卷 564-578页

作者： Yaodeng CHEN Qihang YANG Luyao qin Yuanbing WANG Deming meng Xusheng YAN Key Laboratory of Meteorological Disaster Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing 210044China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China Key Laboratory of Mesoscale Severe Weather Ministry of EducationSchool of Atmospheric SciencesNanjing UniversityNanjing 210023China

Accurate skin temperature is one of the critical factors in successfully assimilating satellite radiance data over ***,model-simulated skin temperature may not be accurate *** address this issue,an extended skin temperature control variable(TSCV) approach is proposed in a variational assimilation framework,which also considers the background error correlation between skin temperature and atmospheric variables.A series of single observation tests and a 10-day cycling assimilation experiment were conducted to evaluate the impact of the TSCV approach on the assimilation of AMSU-A and ATMS(Advanced Technology Microwave Sounder) microwave temperature-sounding channels over *** results of the single observation tests show that by applying the TSCV approach,not only the direct analysis of skin temperature is realized,but also the interaction between skin temperature and atmospheric variables can be achieved during the assimilation *** results of the cycling experiment demonstrate that the TSCV approach improves the skin temperature analysis,which in turn reduces the RMSE of the surface variables and low-level air temperature *** TSCV approach also reduces the difference between the observed and simulated brightness temperatures of both microwave and infrared window channels over land,suggesting that the approach can facilitate the radiance simulation of these channels,thus contributing to the assimilation of window channels.

关键词： radiance assimilation skin temperature control variable microwave temperature-sounding numerical weather prediction

An unusual case of welder＇s siderosis with local massive fibrosis： a case report

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Chinese Medical Journal 2012年第3期125卷 552-554页

作者： Ji Cheng Chen Gang Cai Hou-rong meng fan-qin Chen Yan-bin Guo Ling-chuan Huang Jian-an Ling Chun-hua Soochow Univ Affiliated Hosp 1 Dept Med Div Resp Dis Suzhou 215006 Jiangsu Peoples R China Soochow Univ Affiliated Hosp 1 Dept Pathol Suzhou 215006 Jiangsu Peoples R China Nanjing Univ Nanjing Drum Tower Hosp Div Resp Dis Dept Med Nanjing 210008 Jiangsu Peoples R China Nanjing Univ Nanjing Drum Tower Hosp Dept Pathol Nanjing 210008 Jiangsu Peoples R China

Welder＇s siderosis was traditionally described as ＂benign pneumoconiosis＂ because of the absence of associated symptoms, functional impairment or pulmonary fibrosis. Although several authors have reported evidence of fibrosis in the lungs of welders, sJderosJs with local massJve fibrosis has been rarely descrJbed. In this paper, we present a case of Welder＇s siderosis with local massive fibrosis mimicking lung cancer.

关键词： siderosis occupational disease fibrosis welding

Synthesis，Crystal　Structure　of　N－Salicylidene－o－aminobenzoic　Acid　Dipyridine　Copper（Ⅱ）　Monohydrate

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Chinese Journal of Structural Chemistry 1995年第6期 55-60页

作者： Li Shu-Lan Liu De-Xin meng fan-qin Zhou Jian-Hua(Department of Chemistry,Shandong University,Jinan,250100) Yang Zhao-He(National Laboratory of Crystat Material,Shandong University,Jinan)

The blue crystal of the title complex N-salicylidene-o-aminobenzoic acid dipyridine Cu（Ⅱ） monohydrate,C24H19CuN3O3·H2O, was obtained and examined by the X-ray single crystal diffraction determination. Crystal data are:Mr=*** *** group Cc,Z=4;a=8.431（2）,b=16.568（3）,c=15.885（5）,β=102.97（3）°; V=2162 3,Dc=1.47 g/cm￣3,μ=10.46 cm￣（-1）,F（000）=*** final agreement factors are R=0.045 and Rω=0.052 for 1327 unique reflections[I≥3σ（I）]. The complex is *** which the Cu（Ⅱ） ion has a pseudo-square geometry,with one N atom and two O atoms as coordinated atoms.

关键词： schiff base Cu(Ⅱ) complex crystal structure