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Recent progress on photoactive nonprecious transition-metal complexes

Science China Chemistry 2025年第1期 46-95页

作者： Zhong-Liang Gong Hong-Jie zhang yan Cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong zhang Shaolong Gong Yong Chen Chang-Jiang Yao Yuan-Yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

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Edge Caching in Blockchain Empowered 6G

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China Communications 2021年第1期18卷 1-17页

作者： wen Sun Sheng Li yan zhang School of Cybersecurity Northwestern Polytechnical UniversityXi’an 710072China School of Cyber Engineering Xidian UniversityXi’an 710071China University of Oslo Oslo 0316Norway

The sixth generation(6G)of wireless cellular networks is expected to incorporate the latest developments in network infrastructure and emerging advances in *** the age of 6G,edge caching technology will evolve towards intelligence,dynamics,and ***,the security problems of edge caching,including data tampering and eavesdropping,are seldomly considered in most *** this paper,we consider the two-hop edge caching where the blockchain and physical layer security technologies are adopted to prevent data from being tampered with and *** design blockchain-based framework to guarantee the reliability of important data such as the frequency of contents and jointly optimize content caching probability and redundancy rate to maximize the secure transmission *** simulation shows that our optimization scheme can significantly improve the secure transmission probability of edge cache network,whether facing the threat of independent eavesdropping or joint eavesdropping.

关键词： blockchain 6G edge caching physical layer security

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质子交换膜燃料电池复合材料双极板的研究

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新型炭材料 2004年第4期19卷 303-308页

作者：邹彦文张杰贺俊郑永平唐亚平孙斌邱学良清华大学核能技术设计研究院北京102201

　以高分子预聚物为粘合剂,天然或人造石墨为导电骨料,通过模压一次成型制备质子交换膜燃料电池双极板。研究了导电骨料的组分、树脂的种类及其含量,成型温度、成型压力对双极板性能的影响。结果表明:1)导电骨料的组分、树脂的种类及其... 详细信息

　以高分子预聚物为粘合剂,天然或人造石墨为导电骨料,通过模压一次成型制备质子交换膜燃料电池双极板。研究了导电骨料的组分、树脂的种类及其含量,成型温度、成型压力对双极板性能的影响。结果表明:1)导电骨料的组分、树脂的种类及其含量对制品的性能影响较大;成型温度、成型压力对制品的性能影响较小。2)人造和天然两种石墨混合组分为导电骨料的制品,其导电性能明显高于单一石墨组分的制品;乙烯基树脂为粘合剂的性能优于以邻苯基树脂为粘合剂的双极板的性能。3)使用质量分数为16%～18%的乙烯基树脂作粘结剂,在成型压力为10MPa～20MPa,成型温度为150℃～200℃时制备的复合材料双极板的电导率>300S cm,抗折强度>30MPa,空气透气率为10-7cm2 s。

关键词：质子交换膜燃料电池双极板复合材料导电骨料石墨

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Evidence of temperature-controlled dissolved inorganic nitrogen distribution in a shallow lake

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Journal of Environmental Sciences 2022年第12期34卷 105-114页

作者： yan wen wenqiang zhang Baoqing Shan Jie Qu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Dissolved inorganic nitrogen(DIN) plays an important role in aquatic ecosystems as an available source of nitrogen(N). Despite recent advances in our understanding of the effects of climate change on DIN in coastal waters, shallow high-latitude lakes exposed to large seasonal temperature differences have received limited research attention. Therefore,in the present study, Baiyangdian Lake(BYDL) was selected as the study area, as a typical high latitude shallow lake in North China. Based on water and sediment samples collected in spring, summer and winter seasons, DIN accumulation in sedimentary pore water and DIN diffusion fluxes at the sediment-water interface were quantified under different temperature conditions. Correlation analysis was used to establish the effects of temperature on DIN concentration and diffusion in different media. Results show that the diffusion of DIN at the lake sediment-water interface exhibited a strongly positive relationship with temperature, suggesting that high temperature conditions lead to greater DIN release from sediments. Cold temperatures cause DIN accumulation in sedimentary pore water, providing sufficient substrate for N-related bacteria in the sediment under cold temperature conditions. Temperature controls the vertical distribution of DIN by affecting its migratory diffusion and transformation at the sediment-water interface. These findings are valuable for understanding the impact of climate change on the distribution of N in inland shallow lakes,especially in high latitude shallow lakes subjected to large seasonal temperature differences throughout the year.

关键词： Shallow lake Temperature Dissolved inorganic nitrogen Vertical distribution Diffusion flux

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On the construction of odd-variable boolean functions with optimal algebraic immunity

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The Journal of China Universities of Posts and Telecommunications 2013年第3期20卷 73-77页

作者： zhang Jie wen Qiao-yan School of Science Beijing University of Posts and Telecommunications State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

Algebraic immunity is an important cryptographic property of Boolean functions. In this paper, odd-variable balanced Boolean functions with optimal algebraic immunity are obtained by m-sequence and consequently, we get bases with special constructions of vector space. Furthermore, through swapping some vectors of these two bases, we establish all kinds of odd-variable balanced Boolean functions with optimal algebraic immunity.

关键词： algebraic immunity Boolean functions algebraic attacks annihilators

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An analytical model of hot rolling force for a thick plate by combining globally optimal approximation yield criterion and egg-circular velocity field

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Journal of Iron and Steel Research International 2024年第3期31卷 647-659页

作者： Shun-hu zhang Yi zhang wen-hao Tian yan Li Shagang School of Iron and Steel Soochow UniversitySuzhou 215021JiangsuChina

For the sake of solving the problem that it is difficult to be integrated for the Mises specific plastic power due to its nonlinearity,a new linear criterion,named the globally optimal approximation criterion,is constructed by the polygonal approximation to the Mises *** new criterion is proved to be the linear function of the principal stress componentsσ1,σ2 andσ3 and the trajectory of it on theπ-plane is a non-equiangular but equilateral dodecagon intersecting the Mises *** theoretical results of the current criterion described by the Lode stress parameters are in excellent accordance with the experimental ***,according to the trend that the metallic flow velocity between rollers aggrandizes gradually from the inlet to the outlet during the hot rolling of a thick plate,a biomimetic velocity field is proposed in which the horizontal velocity component fits the egg-circular curve *** velocity field and its simulated results agree quite ***,using the determined linear criterion,energy analysis of the constructed velocity field is utilized to obtain the interior deformation power,while the vector decomposition approach is utilized to obtain the frictional power and shear *** this basis,the overall power is obtained and the analytical solutions are generated for the rolling torque,rolling force and the coefficient of the stress state under different egg curves by minimizing the neutral ***,the parameter optimization of the characteristic parameterρwhich affects the slope of the egg-circular curve is carried out and the best egg-circular curve which can minimize the energy consumption is *** best agreement between the theoretical and observed values of rolling force and rolling torque is under this curve,and the mean relative errors of the rolling torque and rolling force are no more than 2.93%,while the maximum error is no more than 8.35%.

关键词： Yield criterion Plastic deformation Rolling force Velocity field Analytical solution

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ABI联合CIMT对外周动脉疾病患者无症状性冠心病的预测价值

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中国急救复苏与灾害医学杂志 2018年第5期13卷 463-467页

作者：颜雯张焕基杨美兰廖欢张伟勇中山大学附属第八医院广东518033

目的评价踝臂指数（ankle branchial index，ABI）ABI联合颈动脉内中膜厚度（carotid intima—media thickness，CIMT）IMT对外周动脉疾病（peripheralal arterial disease，PAD）患者无症状性冠心病的预测价值。方法随机选择2013年7月-2017年3月中山大学附属第八医院院确诊PAD且无相关临床症状的患者152例，依ABI及CIMT水平分为观察组A组（ABI≤0．9且CIMT〈1．5ram）、B组（ABI≤0．9且CIMT≥1．5mm）、C组（ABI≤0．9且CIMT≥1．5mm），以及对照组D组50例（ABI〉0．9且CIMT〈1．5mm），行冠状动脉造影评估冠脉病变程度，并对所有入选者进行6个月以上主要心血管事件（major adverse cardiovascular events，MACE）的随访，比较各组无症状冠心病与MACE事件的发生率的及其相关性。结果观察组各组中的冠心病及MACE事件发生率明显高于对照组（P〈0．01），以C组最高。校正血糖、血脂及一般临床资料等因素影响后，ABI串行联合CIMT预测PAD患者无症状性冠心病的灵敏度为94．74％，特异性为61．25％，比值比28．26；ABI与冠脉病变程度呈显著负相关（r=0．282，P〈0．01），CIMT与冠脉病变程度呈显著正相关（r=0．405，P〈0．01）。绘制ROC曲线提示ABI≤0．9且CIMT≥1．5mm时对PAD无症状性冠心病有较好的预测价值（曲线下面积0．909±0．023，95％C10．864—0．955，P〈0．01）。结论ABI联合CIMT对可用于识别冠心病的高危人群，为临床工作中对PAD患者无症状性冠心病的早期发现提供一个无创、价廉、简单、可重复的有效手段。

关键词：踝臂指数颈动脉内中膜厚度无症状性冠心病外周血管疾病 ROC曲线

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LARGE-EDDY SIMULATION OF TURBULENT FLOW CONSIDERING INFLOW WAKES IN A FRANCIS TURBINE BLADE PASSAGE

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Journal of Hydrodynamics 2007年第2期19卷 201-209页

作者： WANG wen-quan zhang Li-xiang yan yan GUO Yakun Department of Engineering Mechanics Kunming University of Science and Technology Kunming 650051 China Department of Engineering University of Aberdeen Aberdeen AB24 3UE UK

Turbulent flow in a 3-D blade passage of a Francis hydro turbine was simulated with the Large Eddy Simulation （LES） to investigate the spatial and temporal distributions of the turbulence when strongly distorted wakes in the inflow sweep over the passage, In a suitable consideration of the energy exchanging mechanism between the large and small scales in the complicated passage with a strong 3-D curvature, one-coefficient dynamic Sub-Grid-Scale （SGS） stress model was used in this article. The simulations show that the strong wakes in the inflow lead to a flow separation at the leading zone of the passage, and to form a primary vortex in the span-wise direction. The primary span-wise vortex evolves and splits into smaller vortex pairs due to the constraint of no-slip wall condition, which triggers losing stability of the flow in the passage. The computed pressures on the pressure and suction sides agree with the measured data for a working test turbine model.

关键词： Large Eddy Simulation (LES) turbulent flow,numerical simulation wakes Francis hydro turbine

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叶酸对PCPA抑郁小鼠外侧缰核β-CaMKⅡ水平的影响

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天然产物研究与开发 2017年第7期29卷 1199-1203页

作者：高良才刘鑫男李蔚然边靖文张燕刘锦频华东师范大学生命科学学院上海200241

为探究叶酸对PCPA抑郁症模型小鼠的干预作用及其对外侧缰核β-Ca MK II水平的影响,将昆明种小鼠40只随机分为三组:对照组、模型组、叶酸组,通过腹腔注射PCPA(100 mg/kg)每日1次,连续4 d构建抑郁症模型,旷场与悬尾实验观察小鼠行为变化,H... 详细信息

为探究叶酸对PCPA抑郁症模型小鼠的干预作用及其对外侧缰核β-Ca MK II水平的影响,将昆明种小鼠40只随机分为三组:对照组、模型组、叶酸组,通过腹腔注射PCPA(100 mg/kg)每日1次,连续4 d构建抑郁症模型,旷场与悬尾实验观察小鼠行为变化,HPLC检测小鼠下丘脑5-HT含量,免疫组化测定小鼠外侧缰核β-Ca MK II表达水平。结果显示,模型组与对照组相比自主活动能力下降,悬尾不动时间延长(P0.05)。模型组与对照组相比下丘脑5-HT含量降低,外侧缰核β-Ca MK II表达水平下降(P<0.05)。结果表明叶酸能显著提高下丘脑5-HT含量与外侧缰核β-Ca MK II水平,其抗抑郁作用机制可能与之有关。

关键词：叶酸抑郁症 PCPA β-钙调蛋白激酶

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Flexible CP-ABE Based Access Control on Encrypted Data for Mobile Users in Hybrid Cloud System

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Journal of Computer Science & Technology 2017年第5期32卷 974-990页

作者： wen-Min Li Xue-Lei Li Qiao-yan wen Shuo zhang Hua zhang State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

In hybrid cloud computing, encrypted data access control can provide a fine-grained access method for organizations to enact policies closer to organizational policies. This paper presents an improved CP-ABE (ciphertext-policy attribute-based encryption) scheme to construct an encrypted data access control solution that is suitable for mobile users in hybrid cloud system. In our improvement, we split the original decryption keys into a control key, a secret key and a set of transformation keys. The private cloud managed by the organization administrator takes charge of updating the transformation keys using the control key. It helps to handle the situation of flexible access management and attribute alteration. Meanwhile, the mobile user's single secret key remains unchanged as well as the ciphertext even if the data user's attribute has been revoked. In addition, we modify the access control list through adding the attributes with corresponding control key and transformation keys so as to manage user privileges depending upon the system version. Finally, the analysis shows that our scheme is secure, flexible and efficient to be applied in mobile hybrid cloud computing.

关键词： attribute-based access control hybrid cloud outsourcing computing attribute alteration data verification

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