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Biotic and abiotic stresses on honeybee health

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Integrative Zoology 2024年第3期19卷 442-457页

作者： Zheguang LIN Siyi SHEN kang wang Ting JI Apicultural Research Institute College of Animal Science and TechnologyYangzhou UniversityYangzhouChina

Honeybees are the most critical pollinators providing key ecosystem services that underpin crop production and sustainable *** a backdrop of rapid global change,this eusocial insect encounters a succession of stressors during nesting,foraging,and *** mites,together with vectored viruses,have been recognized as central biotic threats to honeybee health,while the spread of invasive giant hornets and small hive beetles also increasingly threatens colonies *** of agrochemicals,including acaricides used for mite treatment,and other pollutants of the environment have been widely documented to affect bee health in various ***,expanding urbanization,climate change,and agricultural intensification often result in the destruction or fragmentation of flower-rich bee *** anthropogenic pressures exerted by beekeeping management practices affect the natural selection and evolution of honeybees,and colony translocations facilitate alien species invasion and disease *** this review,the multiple biotic and abiotic threats and their interactions that potentially undermine bee colony health are discussed,while taking into consideration the sensitivity,large foraging area,dense network among related nestmates,and social behaviors of honeybees.

关键词： abiotic stressor Apis biotic stressor colony losses interaction effect pollinator decline

Performance of a single-stage auto-cascade refrigerator operating with a rectifying column at the temperature level of -60°C

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第2期12卷 139-145页

作者： Qin wang kang CUI Teng-fei SUN Guang-ming CHEN Institute of Refrigeration and Cryogenics State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

This paper proposes a new approach to the performance optimization of an auto-cascade refrigerator(ACR) operating with a rectifying column and six types of binary refrigerants(R23/R134a,R23/R227ea,R23/R236fa,R170/R290,R170/R600a,and R170/R600) at a temperature level of -60 °C. Half of the six binary refrigerants are nonflammable,of which the 0.5 and the 0.6 mole fractions of R23 for the R23/R236fa possess the most prospective composition for the medium and low suction pressure compressors,respectively. The remaining three binary refrigerants are flammable but with low global warming potentials,of which the 0.6 mole fraction of R170 for the R170/R600 is the most prospective one. The results show that the overall matching as well as local matching of heat capacity rates of hot and cold refrigerants in the recuperators are important for the improvement of coefficient of performance of the cycle,which can be adjusted through the simultaneous optimization of the pressure level and composition. The new approach proposed also offers a wider range of applications to the optimization in performance of the cycle using multi-component refrigerants.

关键词： Auto-cascade Binary refrigerant Refrigerator Optimization

The release and catabolism of ferulic acid in plant cell wall by rumen microbes:A review

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Animal Nutrition 2022年第2期9卷 335-344页

作者： Yan-Lu wang Wei-kang wang Qi-Chao Wu Hong-Jian Yang State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China

Ferulic acid(FA)is one of the most abundant hydroxycinnamic acids in the plant world,especially in the cell wall of grain bran,in comparison with forage and crop *** studies noted that FA was mainly linked with arabinoxylans and lignin in plant cell walls in ester and ether covalent *** forages were ingested by ruminant animals or encountered rumen microbial fermentation in vitro,these cross-linkages form physical and chemical barriers to protect cell-wall carbohydrates from microbial attack and enzymatic ***,increasing studies noted that FA presented some toxic effect on microbial growth in the *** recent decades,many studies have addressed the relationships of ester and/or ether-linked FA with rumen nutrient digestibility,and there is still some controversy whether these linkages could be used as a predicator of forage digestibility in *** authors in this review summarized the possible relationships between ester and/or ether-linked FA and fiber digestion in *** microbes,especially bacteria and fungi,were found capable of breaking down the ester linkages within plant cell walls by secreting feruloyl and p-coumaroyl esterase,resulting in the release of free FA and improvement of cell wall *** increasing evidence noted that these esterases secreted by rumen microbes presented synergistic effects with xylanase and cellulase to effectively hydrolyze forage cell *** released FA were absorbed through the rumen wall directly and entered into blood circulation and presented antioxidant effects on host *** others were partially catabolized into volatile fatty acids by rumen microbes,and the possible catabolic pathways *** better understand plant cell wall degradation in the rumen,the metabolic fate of FA along with lignin decomposition mechanisms are needed to be explored via future microbial isolation and incubation studies with aims to maximize dietary fiber intake

关键词： Rumen microbes Ferulic acid Fiber digestion

Model Free Adaptive Predictive Control of Desulfurization Slurry pH Based on CPS Framework

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Journal of Beijing Institute of Technology 2020年第4期29卷 544-555页

作者： Jian Liu Xiaoli Li kang wang Fuqiang wang Guimei Cui Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Beijing Key Laboratory of Computational Intelligence and Intelligent System Ministry of EducationBeijing 100124China Beijing Advanced Innovation Center for Future Internet Technology Beijing University of TechnologyBeijing 100124China Technology Research Center Shenhua Guohua(Beijing)Electric Power Research Institute CorporationBeijing 100025China School of Information Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China

In order to improve the slurry pH control accuracy of the absorption tower in the wet flue gas desulfurization process,a model free adaptive predictive control algorithm for the desulfurization slurry pH which is based on a cyber physical systems framework is ***,aiming to address system characteristics of non-linearity and pure hysteresis in slurry pH change process,a model free adaptive predictive control algorithm based on compact form dynamic linearization is proposed by combining model free adaptive control algorithm with model predictive control ***,by integrating information resources with the physical resources in the absorption tower slurry pH control process,an absorption tower slurry pH optimization control system based on cyber physical systems is *** is turned out that the model free adaptive predictive control algorithm under the framework of the cyber physical systems can effectively realize the high-precision tracking control of the slurry pH of the absorption tower,and it has strong robustness.

关键词： wet flue gas desulfurization slurry pH cyber physical systems model free adaptive predictive control tracking control

Smart responsive organic microlasers with multiple emission states for high-security optical encryption

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National Science Review 2021年第2期8卷 95-101页

作者： Zhenhua Gao kang wang Yongli Yan Jiannian Yao Yong Sheng Zhao Key Laboratory of photochemistry Institute of ChemistryChinese Academy of Sciences School of Materials Science & Engineering Qilu University of Technology(Shandong Academy of Sciences) University of Chinese Academy of Sciences

Modern high-security cryptography and optical communication call for covert bit sequences with high coding capacity and efficient authentication. Stimuli-responsive lasing emissions with easily distinguishable readout are promising in the coding field as a novel cryptographic primitive, while the application is frequently restricted by the limited number of emission states. Here, we report a strategy of achieving multiple competitive lasing signals in responsive organic microspheres where a donor–acceptor pair was introduced. The competitive lasing from the donor and acceptor was reversibly switched by modulating the competition between the radiative rate of the donor and the rate of energy transfer, and the generated multiple lasing signals enabled a quaternary coding for recognizable cryptographic implementation. Data encryption and extraction were demonstrated using a 4 × 4 microlaser array, showing vast prospects in avoiding the disclosure of security information. The results offer a comprehensive understanding of excited-state dynamics in organic composite materials, which may play a major role in high-security optical recording and information encryption.

关键词： organic laser nanophotonics excited-state process responsiveness optical encryption

Molecular Chaperone-Dependent Polymer Translocation through Nanopores: The Effects of Chaperone Concentration and Chaperone-Polymer Interaction

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Chinese Journal of Polymer Science 2024年第1期42卷 125-132,I0011页

作者： Chang-Sheng Zuo kang wang Li-Zhen Sun Ting-Ting Sun Department of Physics Zhejiang University of Science and TechnologyHangzhou 310023China Department of Applied Physics Zhejiang University of TechnologyHangzhou 310014China

The polymer translocation through a nanopore from a donor space(or named cis side) to a receiver space(trans side) in the chaperone-induced crowded environment has attracted increasing attention in recent years due to its significance in biological systems and technological applications. In this work, we mainly focus on the effects of chaperone concentration and chaperone-polymer interaction on the polymer translocation. By assuming the polymer translocation to be a quasi-equilibrium process, the free energy F of the polymer can be estimated by Rosenbluth-Rosenbluth method and then the translocation time τ can be calculated by Fokker-Plank equation based on the obtained free energy landscape. Our calculation results show that the translocation time can be controlled by independently tuning the chaperone concentration and chaperone-polymer interaction at the cis side or the trans side. There exists a critical chaperone-polymer attraction ε~*=-0.2 at which the volume exclusion and interaction effects of the chaperone can balance each other. Additionally, we also find that at large chaperone-polymer attraction, the translocation time is mainly governed by the diffusion coefficient of the polymer.

关键词： Polymer translocation Rosenbluth-Rosenbluth method Fokker-Plank equation Free energy landscapes

C band single pump photonic crystal fiber Raman amplifier

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Chinese Science Bulletin 2010年第6期55卷 555-559页

作者： JIANG HaiMing XIE kang wang YaFei School of Optoelectronie Information University of Electronic Science and Technology of China Chengdu 610054 China

A novel twin-core photonic crystal fiber was proposed to reduce the complexity and cost of fiber Raman *** means of a proper design,this fiber could acquire a higher and flatter Raman gain efficiency coefficient curve rR=gR/Aeff over a specified band of wavelength than a conventional fiber.A Raman amplifier was designed with this novel twin-core photonic crystal fiber to operate in C band from 1530 nm to 1565 nm.A remarkable improvement over a conventional fiber Raman amplifier was *** was numerically demonstrated that when pumped with a single source,an average gain of 8.7 dB with a fluctuation of less than 0.9 dB is achievable.

关键词：光纤拉曼放大器光子晶体光纤 C波段单泵设计方法增益系数光纤波长复杂性

Optical biometry intraocular lens power calculation using different formulas in patients with different axial lengths

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International Journal of Ophthalmology(English edition) 2013年第2期6卷 150-154页

作者： Jia-kang wang Shu-Wen Chang Department of Ophthalmology Far Eastern Memorial Hospital Oriental Institute of Technology Department of Medicine National Yang Ming University

AIM: To investigate the predictability of intraocular lens (IOL) power calculation using the IOLMaster and different IOL power calculation formulas in eyes with various axial length (AL). METHODS: Patients were included who underwent uneventful phacoemulsification with IOL implantation in the Department of Ophthalmology, Far Eastern Memorial Hospital, Taipei, Taiwan, China from February 2007 to January 2009. Preoperative AL and keratometric values (Ks) were measured by IOLMaster optical biometry. Patients were divided into 3 groups based on AL less than 22mm (Group 1), 22-26mm (Group 2), and more than 26mm (Group 3). The power of the implanted IOL was used to calculate the predicted postoperative spherical equivalence (SE) by various formulas: the Haigis, Hoffer Q, Holladay 1, and SRK/T. The predictive accuracy of each formula was analyzed by comparing the difference between the actual and predicted postoperative SE (MedAE, median absolute error). All the patients had follow-up periods exceeding 3 months. RESULTS: Totally, there were 200 eyes (33 eyes in Group 1, 92 eyes in Group 2, 75 eyes in Group 3). In all patients, the Haigis had the significantly lower MedAE generated by the other formulas (P<0.05). In Group 1 to 3, the MedAE calculated by the Haigis was either significantly lower or comparable to those calculated by the other ***: Compared with other formulas using IOLMaster biometric data, the Haigis formula yields superior refractive results in eyes with various AL.

关键词： intraocular lens optical biometry calculation formula

Low Carbon Economic Dispatch of Integrated Energy System Considering Power Supply Reliability and Integrated Demand Response

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Computer Modeling in Engineering & Sciences 2022年第7期132卷 319-340页

作者： Jian Dong Haixin wang Junyou Yang Liu Gao kang wang Xiran Zhou School of Electrical Engineering Shenyang University of TechnologyShenyang110870China

Integrated energy system optimization scheduling can improve energy efficiency and low carbon *** paper studies an electric-gas-heat integrated energy system,including the carbon capture system,energy coupling equipment,and renewable *** energy scheduling strategy based on deep reinforcement learning is proposed to minimize operation cost,carbon emission and enhance the power supply ***,the lowcarbon mathematical model of combined thermal and power unit,carbon capture system and power to gas unit(CCP)is ***,we establish a low carbon multi-objective optimization model considering system operation cost,carbon emissions cost,integrated demand response,wind and photovoltaic curtailment,and load shedding ***,considering the intermittency of wind power generation and the flexibility of load demand,the low carbon economic dispatch problem is modeled as a Markov decision *** twin delayed deep deterministic policy gradient(TD3)algorithm is used to solve the complex scheduling *** effectiveness of the proposed method is verified in the simulation case *** with TD3,SAC,A3C,DDPG and DQN algorithms,the operating cost is reduced by 8.6%,4.3%,6.1%and 8.0%.

关键词： Integrated energy system twin delayed deep deterministic policy gradient economic dispatch power supply reliability integrated demand response