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Advances of graphdiyne-supported metal catalysts in thermocatalytic reactions

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Nano Research 2024年第4期17卷 2223-2233页

作者： jia Yu Yida Yang Yuliang Li Changyan cao Weiguo Song Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular SciencesLaboratory of Molecular Nanostructures and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular SciencesLaboratory of organic solidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

Supported metal catalysts are widely used in the modern chemical *** electronic interaction between supports and active components is of great significance for heterogeneous ***(GDY),a new type of carbon allotrope with sp-hybridized carbon atoms,πconjugate structure,and electron transmission capability,is a promising candidate as catalyst *** years have witnessed the rapid progress of GDY-supported metal catalysts for different catalysis *** that most processes in the current chemical industry are thermocatalytic reactions,we herein give an overview about the advances and particular characteristics of GDY-supported catalysts in these *** geometric structure and electronic properties of GDY are first ***,the synthesis methods for GDY-supported metal catalysts and their applications in thermocatalytic reactions are discussed,in which the effect of electronic interaction on catalytic performance is ***,the current challenges and future directions of GDY-supported metal catalysts for thermocatalysis are *** is expected that this review will enrich our understanding of the advances of GDY as a superior support for metal catalysts in thermocatalytic reactions.

关键词： graphdiyne metal catalysts thermocatalytic reactions heterogeneous catalysis

Design and synthesis of two dimensional-ZnIn2S4 nanosheets with sulfur vacancies for improving photocatalytic hydrogen production performance

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Progress in Natural Science:Materials International 2023年第5期33卷 607-615页

作者： jianguo He Guanghui Zhang Yichen jiang jianfa jia jianliang cao College of Chemistry and Chemical Engineering Henan Polytechnic University State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization Henan Polytechnic University

The remarkable properties exhibited by two-dimensional(2D) photocatalytic materials,differing from bulk materials,have captivated significant *** this study,a hexagonal-phase ZnIn2S4were synthesized using thiosulfate,thioacetamide,and L-cysteine as sulfur sources(denoted as ZIS-A,ZIS-B and ZIS-C),*** synthesized ZnIn2S4 exhibited varying morphologies and photocatalytic properties,which were characterized through XRD,SEM,TEM,EPR,XPS and so *** results confirmed that ZIS-B with 2D nanosheets structures exhibited superior photocatalytic properties compared with that of the flower-like spheres and block *** hydrogen evolution rate of the ZIS-B is 3653 μmol g-1h-1,which is 3.1 times than that of the other *** improvement was attributable to that the ZIS-B have 2D nanosheets structures and sulfur ***,the 2D nanosheets structure endowed ZnIn2S4with a larger surface area and abundant reactive sites for efficient evolution ***,the presence of sulfur vacancies served as active sites,facilitating carrier transport and ultimately promoting the rate of photocatalytic hydrogen *** results present a novel method for optimizing 2D ZnIn2S4photocatalyst to improve the photocatalytic hydrogen evolution.

关键词： ZnIn2S4 Nanosheets Sulfur vacancies Photocatalytic hydrogen production

Gastroduodenal intussusception due to gastric schwannoma treated by billroth Ⅱ distal gastrectomy:One case report

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World Journal of Gastroenterology 2015年第7期21卷 2225-2228页

作者： jia-Hua Yang min Zhang Zhi-Hua Zhao Yu Shu Jun Hong Yi-Jun cao Department of General Surgery Putuo Hospital Shanghai University of Traditional Chinese Medicine

Schwannomas are rarely observed in the gastrointestinal *** most common symptoms of a gastric schwannoma are abdominal pain or dyspepsia,gastrointestinal bleeding,and an abdominal *** gastric schwannomas are asymptomatic and are discovered incidentally or at *** diagnosis of a schwannoma is based on immunohistochemical positivity for S-100 *** a case report of a rare complication of gastric schwannoma causing gastroduodenal intussusception that was successfully managed by a BillrothⅡdistal *** this rare case,the patient had intermittent,colicky abdominal pain,nausea,and vomiting for over 4wk accompanied by a weight loss.A diagnosis of gastric intussusception was made by computed tomography.A BillrothⅡdistal gastrectomy was then performed,and complete en bloc removal(R0 resection)was *** confirmed a gastric schwannoma through positive immunohistochemical staining for S-100 protein.

关键词： Gastroduodenal intussusception Gastric schwannoma

Phonon-assisted upconversion photoluminescence of quantum emitters

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Journal of Semiconductors 2023年第4期44卷 60-69页

作者： Yuanfei Gao jia-min Lai Jun Zhang Beijing Academy of Quantum Information Sciences Beijing 100193China State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesChinese Academy of SciencesBeijing 100049China

Quantum emitters are widely used in quantum networks,quantum information processing,and quantum sensing due to their excellent optical *** with Stokes excitation,quantum emitters under anti-Stokes excitation exhibit better *** addition to laser cooling and nanoscale thermometry,anti-Stokes excitation can improve the coherence of single-photon sources for advanced quantum *** this review,we follow the recent advances in phononassisted upconversion photoluminescence of quantum emitters and discuss the upconversion mechanisms,applications,and prospects for quantum emitters with anti-Stokes excitation.

关键词： quantum emitters phonon-assisted upconversion electron-phonon coupling single-photon source

Review of phonons in moiré superlattices

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Journal of Semiconductors 2023年第1期44卷 56-67页

作者： Zhenyao Li jia-min Lai Jun Zhang State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China CAS Center of Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100049China

Moirépatterns in physics are interference fringes produced when a periodic template is stacked on another similar one with different displacement and twist *** phonon in two-dimensional(2D)material affected by moirépatterns in the lattice shows various novel physical phenomena,such as frequency shift,different linewidth,and mediation to the *** review gives a brief overview of phonons in 2D moiré***,we introduce the theory of the moiréphonon modes based on a continuum approach using the elastic theory and discuss the effect of the moirépattern on phonons in 2D materials such as graphene and MoS_(2).Then,we discuss the electron-phonon coupling(EPC)modulated by moirépatterns,which can be detected by the spectroscopy ***,the phonon-mediated unconventional superconductivity in 2D moirésuperlattice is *** theory of phonon-mediated superconductivity in moirésuperlattice sets up a general framework,which promises to predict the response of superconductivity to various perturbations,such as disorder,magnetic field,and electric displacement field.

关键词： moirépattern moiréphonon electron-phonon coupling superconductivity

A novel dynamic equivalence method for grid-connected wind farm

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第4期9卷 558-563页

作者： jia-geng QIAO Zong-xiang LU Yong min State Key Laboratory of Power Systems Department of Electrical Engineering Tsinghua University Beijing 100084 China

Dynamic equivalence of the wind farm is a fundamental problem in the simulation of a power system connected with wind farms because it is unpractical to model every generator in a wind farm in detail. In this paper, an Equivalence Method based on the Output Characteristics (EMOC) is proposed, with which the wind farm composed of Squirrel-Cage Induction Generators (SCIGs) can be equivalent to one generator. By considering the diversity of wind generators and special operating characteristics of a wind farm, the equivalent generator based on EMOC responds accurately in various faults. No matter whether the wind farm is integrated in grid or just programmed, EMOC can be used to acquire an accurate equivalent generator. Simulation of the dynamic equivalence of an SCIG wind farm validated the method.

关键词： Grid-connected wind farm Dynamic equivalence Squirrel-Cage Induction Generator (SCIG) Genetic algorithm

Efficacy and safety of Yiqi Peiyuan granules for improving the short-term prognosis of patients with acute kidney injury:A multicenter,double-blind,placebo-controlled,randomized trial

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Journal of Integrative Medicine 2024年第3期22卷 279-285页

作者： jia-jia Wu Tian-yi Zhang Ying-hui Qi min-yan Zhu Yan Fang Chao-jun Qi Li-ou cao Ji-fang Lu Bo-han Lu Lu-min Tang jian-xiao Shen Shan Mou Department of Nephrology Molecular Cell Lab for Kidney DiseaseShanghai Peritoneal Dialysis Research CenterUremia Diagnosis and Treatment CenterRenji Hospital Affiliated to Shanghai Jiaotong University School of MedicineShanghai 200127China Department of Nephrology Shanghai Pudong New Area Punan HospitalShanghai 200125China Department of Nephrology Ningbo Hangzhou Bay HospitalNingbo 315336Zhejiang ProvinceChina

Background:Yiqi Peiyuan(YQPY)prescription,a composite prescription of traditional Chinese medicine,has been used to prevent or delay the continued deterioration of renal function after acute kidney injury(AKI)in some institutions and has shown considerable ***:This is the first randomized controlled trial to assess efficacy and safety of YQPY for improving short-term prognosis in adult patients with ***,setting,participants and interventions:This is a prospective,double-blind,multicenter,randomized,and placebo-controlled clinical trial.A total of 144 enrolled participants were randomly allocated to two groups according to a randomization ***,caregivers and investigators assessing the outcomes were blinded to group *** in the YQPY group received 36 g YQPY granules twice a day for 28 *** in the placebo group received a placebo in the same dose as the YQPY *** outcome measures:The primary outcome was the change in the estimated glomerular filtration rate(eGFR)between baseline and after 4 and 24 weeks of *** secondary outcomes were the change of serum creatinine(Scr)level between baseline and after treatment,and the incidence of endpoint events,defined as eGFR increasing by more than 25%above baseline,eGFR>75 mL/min per1.73 m2or the composite endpoint,which was defined as the sum of patients meeting either of the above ***:Data from a total of 114 patients(59 in the YQPY group and 55 in the control group)were *** mean changes in eGFR and Scr in weeks 4 and 24 had no difference between the two *** further subgroup analysis(22 in the YQPY group and 31 in the control group),the mean change in eGFR after treatment for 4 weeks was 27.39 mL/min per 1.73 m2in the YQPY group and 5.78 mL/min per1.73 m2in the placebo group,and the mean difference between groups was 21.61 mL/min per 1.73 m2(P<0.001).Thirteen(59.1%)patients in the YQPY group and 5(16.1%)in the placebo g

关键词： Chinese herbal medicine Randomized controlled trial Acute kidney injury Renal function

Spatial patterns of leaf nitrogen and phosphorus stoichiometry across southeast to central Tibet

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Journal of Mountain Science 2022年第9期19卷 2651-2663页

作者： WANG Wei ZHAO jia-min XING Zhen College of Resources and Environmental Sciences Tibet Agriculture&Animal Husbandry UniversityNyingchi 860000China Research institute of Tibet Plateau Ecology Tibet Agriculture&Animal Husbandry UniversityNyingchi 860000China

Leaf N and P stoichiometry in terrestrial ecosystems has been widely investigated in recent years owing to the importance of these elements in improving the predicted vegetation responses to global *** vertical distribution of leaf N and P stoichiometry has attracted increasing attention because of the dramatic changes in environmental factors at regional ***,the characteristics of leaf N and P stoichiometry in the southeast Qinghai–Tibet plateau(SET)are not clear,although this area is sensitive to global ***,we analyzed the leaf N and P concentrations in dominant plant species on natural altitudinal gradients on the Duoxiongla(DXL),Sejila(SJL),Mila(ML),and Gangbala(GBL)mountains across the SET all the way to central *** results showed that the leaf N concentrations were comparable among the regions,whereas the leaf P concentrations dramatically decreased from SET to central Tibet(CT).The leaf N concentrations were 23.6,21.3,20.8,and 22.4 g kg^(-1),and the leaf P concentrations were 2.40,2.49,1.94,and 1.59 g kg^(-1) on the SJL,DXL,ML and GBL mountains,*** leaf N/P ratios on the DXL,SJL,ML,and GBL mountains were 8.81,10.3,11.2,and 14.2,*** the increasing trend of the leaf N/P ratio from southeast Qinghai–Tibet plateau to central Tibet,N limitation might widely exist in well vegetated ecosystems in the Qinghai–Tibet plateau.

关键词： Leaf N and P concentration Southeast Tibet Stoichiometry Spatial variations

Optimization of beamforming and path planning for UAV-assisted wireless relay networks

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Chinese Journal of Aeronautics 2014年第2期27卷 313-320页

作者： Ouyang jian Zhuang Yi Lin min Liu jia College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics PLA University of Science and Technology National Mobile Communications Research Laboratory Southeast University Computer Center Nanjing University of Aeronautics and Astronautics

Recently, unmanned aerial vehicles （UAVs） acting as relay platforms have attracted considerable attention due to the advantages of extending coverage and improving connectivity for long-range communications. Specifically, in the scenario where the access point （AP） is mobile, a UAV needs to find an efficient path to guarantee the connectivity of the relay link. Motivated by this fact, this paper proposes an optimal design for beamforming （BF） and UAV path planning. First of all, we study a dual-hop amplify-and-forward （AF） wireless relay network, in which a UAV is used as relay between a mobile AP and a fixed base station （BS）. In the network, both of the AP and the BS are equipped with multiple antennas, whereas the UAV has a single antenna. Then, we obtain the output signal^to-noise ratio （SNR） of the dual-hop relay network. Based on the criterion of maximizing the output SNR, we develop an optimal design to obtain the solution of the optimal BF weight vector and the UAV heading angle. Next, we derive the closed-form outage probability （OP） expression to investigate the performance of the dual-hop relay network conveniently. Finally, computer simulations show that the proposed approach can obtain nearly optimal flying path and OP performance, indicating the effectiveness of the proposed algorithm. Furthermore, we find that increasing the antenna number at the BS or the maximal heading angle can significantly improve the performance of the considered relay network.

关键词： Aircraft communication Beam forming Path planning Unmanned aerial vehicles Wireless relay networks