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Polyoxometalates for continuous power generation by atmospheric humidity

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Nano Research 2024年第3期17卷 1875-1885页

作者： Tuo Ji Weilin Chen Zhenhui Kang liming zhang Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Northeast Normal UniversityChangchun 130024China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices DepartmentSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipaMacao 999078China Institute of Functional State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China

Atmospheric humidity is a sustainable low-value energy widely existing in natural environment,which is a promising candidate to solve the noncontinuous and low efficiency of low-value energy power *** the mono-substituted Dawson-type polyoxometalates are constructed to be highly dispersed organic ammonium-polyoxoanion clusters and are assembled into thin films power generators with micropores,working in atmospheric *** optimal polyoxometalates generator with the thickness of 7.2μm and the area of 0.36 cm^(2) produces a voltage of 0.68 V and a current density of 19.5μA·cm^(-2) under simulated natural environment,and works continuously and stably under almost all-natural environments(humidity 10%–90%).The highly dispersed polyoxometalate nanoclusters can form microporous in polyoxometalate films to effectively absorb atmospheric humidity and spontaneously form distribution gradient of water,which is the structural basis of power *** continuous power generation may be maintained by the effective adsorption and utilization of H_(2)O,the huge electrostatic field of organic ammonium-polyoxoanion clusters,and the reasonably designed polyoxometalates containing inorganic small ions with high *** is the first humidity generator designed with polyoxometalates,which may provide a new research direction for polyoxometalates in sustainable utilization of low-value energy.

关键词： atmospheric humidity continuous power generations nanomaterials polyoxoanions polyoxometalates

DeciLS-PBO: an effective local search method for pseudo-Boolean optimization

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Frontiers of Computer Science 2024年第2期18卷 239-241页

作者： Luyu JIANG Dantong OUYANG Qi zhang liming zhang College of Computer Science and Technology Jilin UniversityChangchun 130012China Key Laboratory of Symbolic Computation and Knowledge Engineering(Ministry of Education) Jilin UniversityChangchun 130012China

1 Introduction Local search method is a rising star for solving combinatorial optimization problems in recent years,and the state-of-the-art local search-based incomplete Maximum Satisfiability(MaxSAT)solversshowpromi... 详细信息

关键词： Max optimization local

Intelligent fault diagnosis methods toward gas turbine: A review

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Chinese Journal of Aeronautics 2024年第4期37卷 93-120页

作者： Xiaofeng LIU Yingjie CHEN Liuqi XIONG Jianhua WANG Chenshuang LUO liming zhang Kehuan WANG School of Transportation Science and Engineering Beihang UniversityBeijing 100191China Systems Engineering Research Institute China State Shipbuilding CorporationBeijing 100094China

Fault diagnosis plays a significant role in conducting condition-based maintenance and health management for gas turbines(GTs) to improve reliability and reduce costs. Various diagnosis methods developed by modeling engine systems or certain components implement faults detection and diagnosis based on the measurement of systemic parameters deviations. However, these conventional model-based methods are hindered by limitations of inability to handle the nonlinear nature, measurement uncertainty, fault coupling and other implementing problems. Recently, the development of artificial intelligence algorithms has provided an effective solution to the above problems, triggering broad researches for data-driven fault diagnosis methods with better accuracy,dynamic performance, and universality. This paper presents a systematic review of recently proposed intelligent fault diagnosis methods for GT engines, according to the classification of shallow learning methods, deep learning methods and hybrid intelligent methods. Moreover, the principle of typical algorithms, the evolution of enhanced methods, and the assessment of pros and cons are summarized to conclude the present status and look forward to the future in the field of GT fault diagnosis. Possible directions for development in method validation, information fusion, and interpretability of intelligent diagnosis methods are concluded in the end to provide insightful concepts for scholars in related fields.

关键词： Fault diagnosis Health management Gas turbine Artificial intelligence Intelligent diagnosis method

Shear behavior and off-fault damage of saw-cut smooth and tension-induced rough joints in granite

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1216-1230页

作者： Fanzhen Meng Feili Wang Louis Ngai Yuen Wong Jie Song Muzi Li Chuanqing zhang liming zhang College of Science Qingdao University of TechnologyQingdao266033China Department of Earth Sciences The University of Hong KongPokfulamHong KongChina State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China Cooperative Innovation Center of Engineering Construction and Safety Shandong Peninsula Blue Economic Zone Qingdao266033China

The damage of rock joints or fractures upon shear includes the surface damage occurring at the contact asperities and the damage beneath the shear surface within the host *** latter is commonly known as off-fault damage and has been much less investigated than the surface *** main contribution of this study is to compare the results of direct shear tests conducted on saw-cut planar joints and tension-induced rough granite joints under normal stresses ranging from 1 MPa to 50 *** shear-induced off-fault damages are quantified and compared with the optical microscope *** results clearly show that the planar joints slip stably under all the normal stresses except under 50 MPa,where some local fractures and regular stick-slip occur towards the end of the *** post-peak stress drop and stick-slip occur for all the rough *** residual shear strength envelopes for the rough joints and the peak shear strength envelope for the planar joints almost *** root mean square(RMS)of asperity height for the rough joints decreases while it increases for the planar joint after shear,and a larger normal stress usually leads to a more significant decrease or increase in ***,the extent of off-fault damage(or damage zone)increases with normal stress for both planar and rough joints,and it is restricted to a very thin layer with limited micro-cracks beneath the planar joint *** comparison,the thickness of the damage zone for the rough joints is about an order of magnitude larger than that of the planar joints,and the coalesced micro-cracks are generally inclined to the shear direction with acute *** findings obtained in this study contribute to a better understanding on the frictional behavior and damage characteristics of rock joints or fractures with different roughness.

关键词： Planar joint Rough joint Shear behavior Off-fault damage Micro-cracks

Vitrification cryopreservation of ligaments based on zwitterionic betaine

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Chinese Journal of Chemical Engineering 2024年第08期 1-9页

作者： liming zhang Xinmeng Liu Haoyue Li Lei zhang Department of Biochemical Engineering Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE) School of Chemical Engineering and Technology Tianjin University Haihe Laboratory of Sustainable Chemical Transformations

Ligament cryopreservation enables a prolonged shelf life of allogeneic ligament grafts, which is fundamentally important to ligament reconstruction. However, conventional cryopreservation techniques fail to eliminate the damage caused by ice crystal growth and the toxicity of cryopreservation agents(CPAs).Here, we report a novel CPA vitrification formulation primarily composed of betaine for ligament cryopreservation. Comprehensive optimization was conducted on the methods for vitrification and rewarming, as well as the loading and unloading conditions, based on the critical cooling rate(CCR),critical warming rate(CWR), and permeation properties of the CPA. Using biomechanical and histological level tests, we demonstrate the superior performance of our method in ligament cryopreservation. After 30 days of vitrification cryopreservation, parameters such as the Young's modulus, tensile stress,denaturation temperature, and glycosaminoglycans content of the ligament remained essentially unchanged. This work pioneers the application of ice-free cryopreservation for ligament and holds great potential for improving the long-term storage of ligament, providing valuable insights for future cryopreservation technique development.

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Assessment of soil total phosphorus storage in a complex topography along China's southeast coast based on multiple mapping scales

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Pedosphere 2024年第1期34卷 236-251页

作者： Zhongxing CHEN Jing LI Kai HUANG Miaomiao WEN Qianlai ZHUANG Licheng LIU Peng ZHU Zhenong JIN Shihe XING liming zhang Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Guangxi Zhuang Autonomous Region Plant Protection Station Nanjing 530022China Department of Earth Atmosphericand Planetary SciencesPurdue UniversityWest Lafayette IN47907US Department of Bioproducts and Biosystems Engineering University of Minnesota-Twin CitiesSaint Paul MN 55108USA Department of Geography The University of Hong KongHong Kong 999077China

Soil phosphorus (P) plays a vital role in both ecological and agricultural ecosystems, where total P (TP) in soil serves as a crucial indicator of soil fertility and quality. Most of the studies covered in the literature employ a single or narrow range of soil databases, which largely overlooks the impact of utilizing multiple mapping scales in estimating soil TP, especially in hilly topographies. In this study, Fujian Province, a subtropical hilly region along China’s southeast coast covered by a complex topographic environment, was taken as a case study. The influence of the mapping scale on soil TP storage (TPS)estimation was analyzed using six digital soil databases that were derived from 3 082 unique soil profiles at different mapping scales, i.e., 1:50 000 (S5),1:200 000 (S20), 1:500 000 (S50), 1:1 000 000 (S100), 1:4 000 000 (S400), and 1:10 000 000 (S1000). The regional TPS in the surface soil (0–20 cm) based on the S5, S20, S50, S100, S400, and S1000 soil maps was 20.72, 22.17, 23.06, 23.05, 22.04, and 23.48 Tg, respectively, and the corresponding TPS at0–100 cm soil depth was 80.98, 80.71, 85.00, 84.03, 82.96, and 86.72 Tg, respectively. By comparing soil TPS in the S20 to S1000 maps to that in the S5map, the relative deviations were 6.37%–13.32%for 0–20 cm and 0.33%–7.09%for 0–100 cm. Moreover, since the S20 map had the lowest relative deviation among different mapping scales as compared to S5, it could provide additional soil information and a richer soil environment than other smaller mapping scales. Our results also revealed that many uncertainties in soil TPS estimation originated from the lack of detailed soil information, i.e., representation and spatial variations among different soil types. From the time and labor perspectives, our work provides useful guidelines to identify the appropriate mapping scale for estimating regional soil TPS in areas like Fujian Province in subtropical China or other places with similar complex topographies. Moreover,

关键词： agricultural management appropriate mapping scale digitized conventional soil map estimation uncertainty subtropical hilly region

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由玄入佛:魏晋南北朝小说中“无鬼论”故事

中国文学研究 2024年第2期 33-39页

作者：张黎明天津大学人文艺术学院天津300072

无鬼论故事是魏晋南北朝小说涉鬼故事中的一类,“无鬼论”和“鬼自证”的二元对立情节使此类故事呈现出高度模式化特点,对后世影响很大。无鬼论故事根植于我国本土有鬼、无鬼的思想论争中,产生于魏晋时期,有着浓厚的玄学清谈色彩。但其... 详细信息

无鬼论故事是魏晋南北朝小说涉鬼故事中的一类,“无鬼论”和“鬼自证”的二元对立情节使此类故事呈现出高度模式化特点,对后世影响很大。无鬼论故事根植于我国本土有鬼、无鬼的思想论争中,产生于魏晋时期,有着浓厚的玄学清谈色彩。但其真正传播开来则在刘宋以来,儒佛之间的“形神论”之争是其兴盛的激发因素,《幽明录》《殷芸小说》集中辑采此类故事有着宣佛意图。无鬼论故事从产生到兴盛经过了一个“由玄入佛”的过程。

关键词：无鬼论故事清谈佛教形神论

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“鉴定贵”:环境民事公益诉讼无法内部化的成本——基于267份一审判决书的深度调查

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湖湘法学评论 2024年第3期4卷 46-56页

作者：章礼明广州大学法学院广东广州510006

“鉴定贵”是环境民事公益诉讼实务中反映的诉讼成本难题,有必要对此展开实证性研究。抽样调查显示,在检察机关起诉的案件中,仅约五分之一因取得环境损害类鉴定证据产生了鉴定费用,并且平均鉴定费不足五千元。这与实务界人士声称的动辄... 详细信息

“鉴定贵”是环境民事公益诉讼实务中反映的诉讼成本难题,有必要对此展开实证性研究。抽样调查显示,在检察机关起诉的案件中,仅约五分之一因取得环境损害类鉴定证据产生了鉴定费用,并且平均鉴定费不足五千元。这与实务界人士声称的动辄“几万到几十万甚至上百万”鉴定费存在明显差距。究其成因,面对高昂的鉴定费,受制于支付能力,检察机关在法院支持下采用了多种规避方法。然而,这些规避行为实质上有损判决的公正性。这表明“鉴定贵”是一项无法内部化的诉讼成本,现行环境民事公益诉讼缺乏实效性,有待进一步规范与完善。

关键词：民事公益诉讼环境损害类鉴定证据诉讼成本鉴定贵鉴定费用

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大气消光系数多基线透射式光电测量影响分析

光学学报 2024年第12期44卷 122-135页

作者：曹韩晖陈洪耀张黎明李佳伟中国科学技术大学安徽合肥230026 中国科学院合肥物质科学研究院安徽合肥230031 中国科学院通用光学定标与表征技术重点实验室安徽合肥230031

针对透射式消光系数测量精度不高、难以实现自校准等问题,研究一种基于主动光源的多波段、多基线透射式消光系数测量方法,定量分析光电探测电路信号分辨率、噪声特性、动态范围、随机噪声、响应温度敏感性、数字信号处理、背景辐射等因... 详细信息

针对透射式消光系数测量精度不高、难以实现自校准等问题,研究一种基于主动光源的多波段、多基线透射式消光系数测量方法,定量分析光电探测电路信号分辨率、噪声特性、动态范围、随机噪声、响应温度敏感性、数字信号处理、背景辐射等因素对消光系数的影响。结果表明:探测光电流应不小于1.27×10^(-7)A,每次移动距离应不小于1 m,每个测量点时长应不少于40 s,采样率应不小于10 kHz,在目前可实现的基线距离5~20 m范围内,采用谱峰搜索法或取样积分法进行准同步测量,消光系数测量精度受随机噪声影响小于0.8%,这为仪器实现高精度测量研究提供理论基础。

关键词：大气光学消光系数变基线透射仪光电测量大气透过率