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High-efficient removal of tetracycline in water via porous magnetic Ce/Fe photocomposite under visible light

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Journal of Rare Earths 2023年第10期41卷 1532-1540,I0003页

作者： Weihang Han Jingxuan Shou Yifan Yang Liangchen Chen Luping Zhang Yutong Chen Xuewei Tu Dan Jin Shijie Zhang Yurong Chang Hui Zheng college of Material Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou311121China college of Civil Engineering Zhejiang University of TechnologyHangzhou311121China hangzhou Zeyuan Safety Technology co. Ltd.Hangzhou311121China hangzhou Synbest Biotech co. Ltd.Hangzhou311121China Henan Qite New Material co. Ltd.Zhengzhou450000China

Tetracycline is a typical antibiotic commonly used in various industries which is eco-toxic and quickly causes bacterial *** re,studying the efficient removal of tetracycline is necessary to protect the water ***,a novel Ce/Fe nanoparticle composite(1CCFO)was prepared by the sol-gel method and its removal effects of tetracycline under visible light were *** relationship between physicochemical properties of catalyst and photocatalytic degradation effects of tetracycline was analyzed based on a series of characterizations data such as X-ray diffraction(XRD),Raman spectro scopy,a vibrating sample magnetometer(VSM),scanning electron microscopy(SEM),Brunauer-Emmett-Teller(BET)method,X-ray photoelectron spectroscopy(XPS),and ultraviolet-visible(UV-Vis)*** results show that Ce/Fe photocatalyst possesses a large specific surface area,good visible light response,abundant oxygen vacancies and excellent redox performance,exhibiting good adsorption capacity,remarkable catalytic performance and *** optimal conditions for tetracycline removal were explored through orthogonal *** 88%of tetracycline can be photodegraded in 1 h under optimal *** possible decomposition pathways,main reactive oxygen species and suitable mechanism of the photocatalytic system were studied by liquid chromatography-mass spectro metry(LC-MS),an electron spin resonance(ESR)spectrometer and free radical quenching *** results show that 1CCFO has an efficient degradation effect on tetracycline under visible light,which provides a feasible method to improve the performance of 1CCFO.

关键词： Photocatalysis Degradation Tetracycline Fe-based photocatalyst Porous Rare earths

Numerical Simulation and Experimental Research on the Influence of Solid-phase Characteristics on Centrifugal Pump Performance

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Chinese Journal of Mechanical Engineering 2012年第6期25卷 1184-1189页

作者： LI Yi ZHU Zuchao HE Weiqiang HE Zhaohui Laboratory of Fluid Transmission and Application Zhejiang Sci-Tech University Hangzhou 310018 China hangzhou Dalu Industry co. Ltd Hangzhou 311234 China Zhejiang Institute of Mechanical & Electrical Engineering co. Ltd Hangzhou 310002 China

The law governing the movement of particles in the centrifugal pump channel is complicated; thus, it is difficult to examine the solid-liquid two-phase turbulent flow in the pump. consequently, the solid-liquid two-phase pump is designed based only on the unary theory. However, the obvious variety of centrifugal-pump internal flow appears because of the existence of solid phase, thus changing pump performance. Therefore, it is necessary to establish the flow characteristics of the solid-liquid two-phase pump. In the current paper, two-phase numerical simulation and centrifugal pump performance tests are carried out using different solid-particle diameters and two-phase mixture concentration conditions. Inner flow features are revealed by comparing the simulated and experimental results. The comparing results indicate that the influence of the solid-phase characteristics on centrifugal-pump performance is small when the flow rate is low, specifically when it is less than 2 m3/h. The maximum efficiency declines, and the best efficiency point tends toward the low flow-rate direction along with increasing solid-particle diameter and volume fraction, leading to reduced pump steady efficient range. The variation tendency of the pump head is basically consistent with that of the efficiency. The efficiency and head values of the two-phase mixture transportation are even larger than those of pure-water transportation under smaller particle diameter and volume fraction conditions at the low-flow-rate region. The change of the particle volume fraction has a greater effect on the pump performance than the change in the particle diameter. The experimental values are totally smaller than the simulated values. This research provides the theoretical foundation for the optimal design of centrifugal pump.

关键词： solid-liquid two phase centrifugal pump performance test numerical simulation

D-stability and disturbance attenuation properties fornetworked control systems： switched system approach

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Journal of Systems Engineering and Electronics 2016年第5期27卷 1108-1114页

作者： Qiuxia Chen Andong Liu college of Information Engineering Zhejiang University of TechnologyHangzhou 310023China hangzhou Hangyang co. Ltd.Hangzhou 310014China

Both D-stability and finite L2-gain properties are studiedfor a class of uncertain discrete-time systems with timevaryingnetwork-induced delays. By using coordinate transformand delay partition, the D-stability and H∞ performance problemsfor such networked control systems （NCSs） are equivalentlytransferred into the corresponding problems for switching systemswith arbitrary switching. Then, a sufficient condition for the existenceof the robust D-stabilizing controllers is derived in termsof linear matrix inequality （LMI）, and the design method is alsopresented for the state feedback controllers which guarantee thatall the closed-loop poles remain inside the specified disk D（α,r）and the desired disturbance attenuation level. Finally, an illustrativeexample is given to demonstrate the effectiveness of the proposedresults.

关键词： D-stability networked control system (NCS) H∞performance switching system.

Efficacy of rigosertib, a small molecular RAS signaling disrupter for the treatment of KRAS-mutant colorectal cancer

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Cancer Biology & Medicine 2022年第2期19卷 213-228页

作者： Xinyi Zhou Qian Xiao Dongliang Fu Haochen Zhang Yang Tang Jinjie He Yeting Hu Xiangxing Kong Fei Teng Xiangrui Liu Ying Yuan Kefeng Ding Department of colorectal Surgery and Oncology Key Laboratory of Cancer Prevention and InterventionMinistry of Educationthe Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009China Department of Medical Oncology Key Laboratory of Cancer Prevention and InterventionMinistry of Educationthe Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009China hangzhou oncocare co ltd Hangzhou 310009China Department of Pharmacology Zhejiang University School of MedicineHangzhou 310058China Cancer Center Zhejiang UniversityHangzhou 310009China

Objective:Mutant KRAS,the principal isoform of RAS,plays a pivotal role in the oncogenesis of colorectal cancer by constitutively activating the RAF/MEK/ERK and PI3K/AKT *** targeted therapies are urgently *** investigated whether rigosertib,a benzyl styryl sulfone RAS signaling disruptor,could selectively kill KRAS-mutant colorectal cancer ***:CCK-8 was used to determine the cell ***-derived tumor and cancer cell xenograft models were used to detect the inhibitory efficacy of *** cytometry was used to evaluate the apoptosis and cell cycle *** and cell cycle arrest markers were detected by Western ***-DA was used to determine the reactive oxygen *** staining and Western blot were performed to characterize RAS signaling markers in colorectal cancer tissues and ***:Rigosertib(RGS)exhibited a cytotoxic effect against colorectal cancer cells,which was greater in KRAS-mutant ***,RGS induced mitotic arrest and oxidative stress-dependent apoptosis in KRAS-mutant DLD1 and HCT116 ***,RGS disrupted RAS signaling,and the inhibition of RAS/MEK/ERK was independent of cellular oxidative *** patient-derived xenograft models,the response and tumor inhibition of RGS were significantly higher in the KRAS-mutant subgroup,while p-MEK,p-ERK,and p-AKT levels of RGS-treated tumors were significantly ***,in a KRAS-mutant,chemotherapy-resistant patient-derived xenograft model,RGS showed a stronger therapeutic effect than the combination standard therapy involving fluoropyrimidine+oxaliplatin/irinotecan+***:These data showed that targeting RAS signaling using RGS could be a therapeutic treatment for KRAS-mutant colorectal cancer patients.

关键词： colorectal cancer KRAS mutation rigosertib therapeutic effect RAS signaling

Grinding Chatter Detection and Identication Based on BEMD and LSSVM

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Chinese Journal of Mechanical Engineering 2019年第1期32卷 90-102页

作者： Huan-Guo Chen Jian-Yang Shen Wen-Hua Chen Chun-Shao Huang Yong-Yu Yi Jia-Cheng Qian Zhejiang Province’s Key Laboratory of Reliability Technology for Mechanical and Electrical Product Hangzhou 310018 China Zhejiang Jiali Technology co. Ltd. Hangzhou 311241 China hangzhou Hangji Machine Tool co. Ltd.Hangzhou 310018 China

Grinding chatter is a self?induced vibration which is unfavorable to precision machining processes. This paper proposes a forecasting method for grinding state identification based on bivarition empirical mode decomposition(BEMD) and least squares support vector machine(LSSVM), which allows the monitoring of grinding chatter over time. BEMD is a promising technique in signal processing research which involves the decomposition of two?dimen?sional signals into a series of bivarition intrinsic mode functions(BIMFs). BEMD and the extraction criterion of its true BIMFs are investigated by processing a complex?value simulation chatter signal. Then the feature vectors which are employed as an amplification for the chatter premonition are discussed. Furthermore, the methodology is tested and validated by experimental data collected from a CNC guideway grinder KD4020 X16 in hangzhou Hangji Machine Tool co., ltd. The results illustrate that the BEMD is a superior method in terms of processing non?stationary and nonlinear signals. Meanwhile, the peak to peak, real?time standard deviation and instantaneous energy are proven to be e ec?tive feature vectors which reflect the di erent grinding states. Finally, a LSSVM model is established for grinding status classification based on feature vectors, giving a prediction accuracy rate of 96%.

关键词： Grinding chatter BEMD and LSSVM complex-value chatter signal Feature vector Grinding status classification

Sulfolane‑Based Flame‑Retardant Electrolyte for High‑Voltage Sodium‑Ion Batteries

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Nano-Micro Letters 2025年第2期17卷 498-516页

作者： Xuanlong He Jie Peng Qingyun Lin Meng Li Weibin Chen Pei Liu Tao Huang Zhencheng Huang Yuying Liu Jiaojiao Deng Shenghua Ye Xuming Yang Xiangzhong Ren Xiaoping Ouyang Jianhong Liu Biwei Xiao Jiangtao Hu Qianling Zhang Graphene composite Research Center College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Center of Electron Microscopy State Key Laboratory of Silicon and Advanced Semiconductor MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China GRINM(Guangdong)Research Institute for Advanced Materials and Technology FoshanGuangdong 528051People’s Republic of China college of Energy Engineering Zhejiang UniversityHangzhouZhejiang 310027People’s Republic of China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105People’s Republic of China Shenzhen Eigen-Equation Graphene Technology co.ltd Shenzhen 518000People’s Republic of China

Sodium-ion batteries hold great promise as next-generation energy storage ***,the high instability of the electrode/electrolyte interphase during cycling has seriously hindered the development of *** particular,an unstable cathode–electrolyte interphase(CEI)leads to successive electrolyte side reactions,transition metal leaching and rapid capacity decay,which tends to be exacerbated under high-voltage ***,constructing dense and stable CEIs are crucial for high-performance *** work reports localized high-concentration electrolyte by incorporating a highly oxidation-resistant sulfolane solvent with non-solvent diluent 1H,1H,5H-octafluoropentyl-1,1,2,2-tetrafluoroethyl ether,which exhibited excellent oxidative stability and was able to form thin,dense and homogeneous *** excellent CEI enabled the O3-type layered oxide cathode NaNi_(1/3)Mn_(1/3)Fe_(1/3)O_(2)(NaNMF)to achieve stable cycling,with a capacity retention of 79.48%after 300 cycles at 1 C and 81.15%after 400 cycles at 2 C with a high charging voltage of 4.2 *** addition,its nonflammable nature enhances the safety of *** work provides a viable pathway for the application of sulfolane-based electrolytes on SIBs and the design of next-generation high-voltage electrolytes.

关键词： Sodium-ion batteries Sulfolane-based electrolyte High voltage Layered oxide cathode Flame retardant

A novel analog/digital reconfigurable automatic gain control with a novel DC offset cancellation circuit

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Journal of Semiconductors 2011年第2期32卷 79-84页

作者：何晓丰莫太山马成炎叶甜春 Institute of Microelectronics Chinese Academy of Science hangzhou Zhongke Microelectronics co Ltd

An analog/digital reconfigurable automatic gain control （AGC） circuit with a novel DC offset cancel- lation circuit for a direct-conversion receiver is presented. The AGC is analog/digital reconfigurable in order to be compatible with different baseband chips. What＇s more, a novel DC offset cancellation （DcoC） circuit with an HPCF （high pass cutoff frequency） less than 10 kHz is proposed. The AGC is fabricated by a 0.18μm CMOS process. Under analog control mode, the AGC achieves a 70 dB dynamic range with a 3 dB-bandwidth larger than 60 MHz. Under digital control mode, through a 5-bit digital control word, the AGC shows a 64 dB gain control range by 2 dB each step with a gain error of less than 0.3 dB. The DC offset cancellation circuits can suppress the output DC offset voltage to be less than 1.5 mV, while the offset voltage of 40 mV is introduced into the input. The overall power consumption is less than 3.5 mA, and the die area is 800 ×300μm2.

关键词： automatic gain control analog/digital reconfigurable DC offset cancellation

A novel reconfigurable variable gain amplifier for a multi-mode multi-band receiver

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Journal of Semiconductors 2010年第7期31卷 131-136页

作者：郑家杰莫太山马成炎殷明 Institute of Microelectronics Chinese Academy of Sciences hangzhou Zhongke Microelectronics co Ltd

This paper presents a novel approach for designing a reconfigurable variable gain amplifier（VGA） for the multi-mode multi-band receiver system RF front-end *** configuration,which is comprised of gain circuits,control circuit,DC offset cancellation circuit and mode switch circuit is proposed to save die area and power consumption with the function of multi-mode and multi-band through *** VGA is realized in 0.18μm CMOS technology with 1.8 V power supply voltage providing a gain tuning range from 5 to 87 dB when the control voltage varies from 0 to 1.8 *** 3 dB bandwidth is about 80 MHz for all levels of control voltage（all gains）.Also,the DC offset cancellation circuit can effectively suppress DC offset to a value of less than 40 mV at the output regardless of the *** overall power consumption is less than 3 mA,and die area is 705×100μm^2.

关键词： variable gain amplifier multi-mode multi-band reconfigurable

DVB-S2 inner receiver design for broadcasting mode

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第1期8卷 28-35页

作者： YANG Jian-xiao WANG Kuang ZOU Zhi-yong Institute of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China Guoxin co Ltd Hangzhou 310027 China

This paper details on the design of DVB-S2 receivers which is compliant with the broadcasting mode. Special at-tention is paid to the specific receiver functions necessary to demodulate the received signal. To show the system performance we consider the design of a complete receiver consisting of timing recovery unit, frame synchronization unit, frequency recovery unit and phase recovery unit. The system is easier to hardware implementation comparing with that provided in (ETSI, 2005; Sun et al., 2004). After the performance of the algorithms is analyzed and a quantitative result is given, this allows us to draw conclusions concerning the achievable system performance under realistic complexity assumptions.

关键词： DVB-S2 Timing recovery Frame synchronization Frequency recovery Phase recovery