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Exact Bivariate Polynomial Factorization over Q by Approximation of Roots

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Journal of Systems Science & Complexity 2015年第1期28卷 243-260页

作者： FENG Yong WU Wenyuan ZHANG Jingzhong chen jingwei Chongqing Key Lab of Automated Reasoning and Cognition Chongqing Institute of Green and Intelligent Technology(CIGIT)Chinese Academy of Sciences

Factorization of polynomials is one of the foundations of symbolic *** applications arise in numerous branches of mathematics and other ***,the present advanced programming languages such as C++ and J++,do not support symbolic computation ***,it leads to difficulties in applying factorization in engineering *** this paper,the authors present an algorithm which use numerical method to obtain exact factors of a bivariate polynomial with rational *** proposed method can be directly implemented in efficient programming language such C++ together with the GNU Multiple-Precision *** addition,the numerical computation part often only requires double precision and is easily parallelizable.

关键词： Factorization of multivariate polynomials interpolation methods minimal polynomial numerical continuation.

Sparse bivariate polynomial factorization

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Science China Mathematics 2014年第10期57卷 2123-2142页

作者： WU WenYuan chen jingwei FENG Yong Chongqing Key Laboratory of Automated Reasoning and Cognition Chongqing Institute of Green and Intelligent TechnologyChinese Academy of Sciences

Motivated by Sasaki＇s work on the extended Hensel construction for solving multivariate algebraic equations, we present a generalized Hensel lifting, which takes advantage of sparsity, for factoring bivariate polynomial over the rational number field. Another feature of the factorization algorithm presented in this article is a new recombination method, which can solve the extraneous factor problem before lifting based on numerical linear algebra. Both theoretical analysis and experimental data show that the algorithm is etIicient, especially for sparse bivariate polynomials.

关键词： polynomial factorization sparse polynomial generalized Hensel lifting

Cation-Anion Redox Active Organic Complex for High Performance Aqueous Zinc Ion Battery

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Energy & Environmental Materials 2024年第1期7卷 60-67页

作者： Lilin Zhang Yining chen Zongyuan Jiang jingwei chen Cong Wei Wenzhuo Wu Shaohui Li Qun Xu School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Ocean University of China Qingdao 266100China

Organic redox compounds are attractive cathode materials in aqueous zinc-ion batteries owing to their low cost,environmental friendliness,multiple-electron-transfer reactions,and resource ***,the realized energy density is constrained by the limited capacity and low ***,copper-tetracyanoquinodimethane(CuTCNQ),an organic charge-transfer complex is evaluated as a zinc-ion battery cathode owing to the good electron acceptation ability in the cyano groups that improves the voltage *** electrochemical activation,electrolyte optimization,and adoption of graphene-based separator,CuTCNQ-based aqueous zinc-ion batteries deliver much improved rate performance and cycling stability with anti-self-discharge *** structural evolution of CuTCNQ during discharge/charge are investigated by ex situ Fourier transform infra-red(FT-IR)spectra,ex situ X-ray photoelectron spectroscopy(XPS),and in situ ultraviolet visible spectroscopy(UV-vis),revealing reversible redox reactions in both cuprous cations(Cu^(+))and organic anions(TCNQ^(x-1)),thus delivering a high voltage output of 1.0 V and excellent discharge capacity of 158 mAh g^(-1).The remarkable electrochemical performance in Zn//CuTCNQ is ascribed to the strong inductive effect of cyano groups in CuTCNQ that elevated the voltage output and the graphene-modified separator that inhibited CuTCNQ dissolution and shuttle effect in aqueous electrolytes.

关键词： cathode materials cyano groups electrochemical activation organic charge-transfer complex zinc-ion battery

Plasma enhanced chemical vapor deposition of excellent a-Si：H passivation layers for a-Si：H/c-Si heterojunction solar cells at high pressure and high power

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Frontiers in Energy 2017年第1期11卷 85-91页

作者： Lei ZHAO Wenbin ZHANG jingwei chen Hongwei DIAO Qi WANG Wenjing WANG Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China GCL System Integration Technology Co. Ltd Shanghai 201406 China

The intrinsic a-Si：H passivation layer inserted between the doped a-Si：H layer and the c-Si substrate is very crucial for improving the performance of the a-Si：H/c- Si heterojunction （SHJ） solar cell. The passivation performance of the a-Si：H layer is strongly dependent on its microstructure. Usually, the compact a-Si：H deposited near the transition from the amorphous phase to the nanocrystalline phase by plasma enhanced chemical vapor deposition （PECVD） can provide excellent passivation. However, at the low deposition pressure and low deposition power, such an a-Si：H layer can be only prepared in a narrow region. The deposition condition must be controlled very carefully. In this paper, intrinsic a- Si：H layers were prepared on n-type Cz c-Si substrates by 27.12 MHz PECVD at a high deposition pressure and high deposition power. The corresponding passivation perfor- mance on c-Si was investigated by minority carrier lifetime measurement. It was found that an excellent a-Si：H passivation layer could be obtained in a very wide deposition pressure and power region. Such wide process window would be very beneficial for improving the uniformity and the yield for the solar cell fabrication. The a-Si：H layer microstructure was further investigated by Raman and Fourier transform infrared （FTIR） spectro-scopy characterization. The correlation between the microstructure and the passivation performance was revealed. According to the above findings, the a-Si：H passivation performance was optimized more elaborately. Finally, a large-area SHJ solar cell with an efficiency of 22.25% was fabricated on the commercial 156 mm pseudo-square n-type Cz c-Si substrate with the opencircuit voltage （Voc） of up to 0.732 V.

关键词： PECVD high pressure and high power,a-Si:H microstructure passivation heterojunction solar cell

Effect of Bushenwenyanghuayu decoction on nerve growth factor and bradykinin/bradykinin B_1 receptor in a endometriosis dysmenorrhea mouse model

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Journal of Traditional Chinese Medicine 2015年第2期35卷 184-191页

作者： chen jingwei Du Huilan Tong Ruixiao Yang Hua Ma Huirong Gynecology and Obstetrics Staff Room of Integrative Medicine Hebei University of Chinese Medicine Department of Gynaecology Chinese Medicine Hospital of Handan Department of Public Courses Hebei College of Science and Technology

OBJECTIVE:To observe the effects of Bushenwenyanghuayu decoction(BD),a Traditional Chinese Medicine(TCM),on the serum concentration of nerve growth factor(NGF) and bradykinin(BK),and protein and mRNA levels of NGF and bradykinin B_1receptor(BKB1R) in a mouse model of endometriosis ***:Seventy-five experimental female BALB/c mice were randomly divided into five groups,15 mice each:sham,model,BD high dose(61.67 g/kg),BD low dose(15.42 g/kg),and gestrinone(0.4 mg/kg) *** the mice except for those in the sham group underwent auto-transplantation surgery and were gavaged estradiol valerate(0.5 mg/kg,daily for 12 days) after *** the 12 th day,1 h after administration,writhing response was induced by intraperitoneal injection of oxytocin at 2 U/*** writhing frequency and latency were recorded and the volume of the ectopic foci was *** concentration of serum NGF and BK was detected by enzyme-linked immunosorbent assay,the protein expression of NGF and BKB1 R was tested by immunohistochemistry and western blotting,and NGF and BKB1 R mRNAs were detected by real-time ***:Compared with the model group,the volume of the ectopic foci in the treatment groups was significantly lower(P < 0.01),the writhing frequency was decreased(P < 0.05),and the writhing latency was prolonged(P < 0.01).Compared with the sham group,serum NGF and BK levels in the model group were significantly increased(P <0.01).There were positive correlations for writhing frequency among the NGF and BK groups(P <0.01).The serum NGF and BK levels were significantly lower in the treatment groups than the model group(P < 0.05).The protein expression of NGF,BKB1 R was significantly decreased in the treatment groups compared with the model group(P < 0.01).NGF and BKB1 R mRNA expression was significantly decreased in the treatment groups compared with the model group(P < 0.01).CONCLUSION:NGF and BK/BKB1 R may play an important role in the development of endometriosis

关键词： Endometriosis Dysmenorrhea Nerve growth factor Bradykinin Bradykinin B receptor Bushenwenyanghuayu decoction

Fast and high-fidelity generation of photonic Greenberger-Horne-Zeilinger states in circuit QED

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Communications in Theoretical Physics 2020年第1期72卷 52-59页

作者： jingwei chen Guan-Hao Feng Hong-Hao Zhang L F Wei School of Physics Sun Yat-sen UniversityGuangzhou 510275China Photonics Laboratory and Institute of Functional Materials College of ScienceDonghua UniversityShanghai 201620China Information Quantum Technology Laboratory School of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 610031China

A fast scheme to generate Greenberger-Horne-Zeilinger states between different cavities in circuit QED systems is *** implement this scheme,we design a feasible experimental device with three qubits and three *** this device,all the couplings between qubit and qubit,cavity and qubit are tunable and are independent with frequencies,and thus the shortcut to adiabaticity technique can be directly applied in our *** is demonstrated that the GHZ state can be generated rapidly with high fidelity in our scheme.

关键词： GHZ states shortcut to adiabaticity quantum state engineering circuit QED

Encapsulation of MnS Nanocrystals into N,S-Co-doped Carbon as Anode Material for Full Cell Sodium-Ion Capacitors

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Nano-Micro Letters 2020年第3期12卷 55-68页

作者： Shaohui Li jingwei chen Jiaqing Xiong Xuefei Gong Jinghao Ciou Pooi See Lee School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Singapore-HUJ Alliance for Research and Enterprise(SHARE) Nanomaterials for Energy and Water Nexus(NEW)Campus for Research Excellence and Technological Enterprise(CREATE)1 Create waySingapore 138602Singapore

Sodium-ion capacitors(SICs)have received increasing interest for grid stationary energy storage application due to their affordability,high power,and energy *** major challenge for SICs is to overcome the kinetics imbalance between faradaic anode and nonfaradaic *** boost the Na+reaction kinetics,the present work demonstrated a high-rate MnS-based anode by embedding the MnS nanocrystals into the N,S-co-doped carbon matrix(MnS@NSC).Benefiting from the fast pseudocapacitive Na+storage behavior,the resulting composite exhibits extraordinary rate capability(205.6 mAh g−1 at 10 A g−1)and outstanding cycling stability without notable degradation after 2000 cycles.A prototype SIC was demonstrated using MnS@NSC anode and N-doped porous carbon(NC)cathode;the obtained hybrid SIC device can display a high energy density of 139.8 Wh kg−1 and high power density of 11,500 W kg−1,as well as excellent cyclability with 84.5%capacitance retention after 3000 *** superior electrochemical performance is contributed to downsizing of MnS and encapsulation of conductive N,S-co-doped carbon matrix,which not only promote the Na+and electrons transport,but also buffer the volume variations and maintain the structure integrity during Na+insertion/extraction,enabling its comparable fast reaction kinetics and cyclability with NC cathode.

关键词： Sodium-ion capacitor Nanocrystal Co-doped carbon Pseudocapacitive control behavior

Photoelectric Properties of Soluble ZnPc-Epoxy Derivative Doped with C_(60)

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Journal of Materials Science & Technology 2006年第4期22卷 549-551页

作者： jingwei chen Yue SHEN Jiancheng ZHANG Feng GU Jinzhuan ZHU Yiben XIA School of Materials Science and Engineering Shanghai University Shanghai 200072 China

A kind of soluble phthalocyanine derivative （ZnPc-epoxy derivative） was synthesized, and the influence of C60 on the photoelectric properties of the derivative was studied. The results of ultraviolet-visible （UV-Vis） spectra show that the absorption of the complex is larger than that of the ZnPc-epoxy derivative at B belt. But compared with the derivative, the absorption of the complex decreased at Q belt. The fluorescence spectra show that C60 takes role as annihilation in ZnPc-epoxy derivative. Photo-current tests show that the ZnPc-epoxy derivative-C60 film exhibits increasing photoconductive property.

关键词： Photoelectric properties ZnPc-epoxy derivative C60

Heat transfer characteristics in a rotating AR=4:1 channel with different channel orientations at high rotation numbers

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Propulsion and Power Research 2021年第2期10卷 130-142页

作者： Yang Li jingwei chen Wei Li Hongwu Deng Shulin Xue Hunan Key Laboratory of Turbomachinery on Small and Medium Aero-Engine AECC Hunan Aviation Powerplant Research InstituteZhuzhou412002China National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics School of Energy and Power EngineeringBeihang UniversityBeijing100191China

In order to reveal the effect of channel orientations on rotational heat transfer performance,this paper presents an experimental model of AR=4:1 smooth rectangular *** stationary and rotational heat transfer characteristics of the channel are studied in the range of Re=10,000-40,000 and Ro=0-1.23 under the channel orientation of 90°and 135°,which represent the basic one and realistic one,*** experimental results indicate that for the trailing wall,the 90°channel shows a typical large range enhancement of rotational heat transfer,while the rotational effect becomes negative in most areas at 135°*** the rotation number exceeds 0.7,the heat transfer of the trailing surface is greatly improved by rotational effect in 90°*** the channel was orientated at 135°,the leading surface heat transfer is more sensitive to rotation under the low rotation number(Ro<0.3),and 20%-30%worse than non-rotating *** averaged Nusselt ratios correlations under the channel orientation of 90°and 135°have been developed for further engineering applications.

关键词： Turbine blade cooling Rotational effect Heat transfer correlations High aspect ratio Channel orientation