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Raman Spectra of Deuterated Potassium Dihydrogen Phosphate Crystals with Different Degrees of Deuteration

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Chinese Physics Letters 2013年第6期30卷 205-208页

作者： LIU Bao-An ZHOU Hai-Liang ZHANG Qing-Hua XU Ming-Xia JI Shao-Hua ZHU Li-Li ZHANG Li-Song LIU Fa-Fu SUN Xun XU Xin-Guang State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100 School of Information Science and Engineering Shandong Agricultural UniversityTaian 271018 chengdu Fine Optical Engineering Research Centre Chengdu 610041

The polarized Raman spectra of deuterated potassium dihydrogen phosphate crystals with different deuterium concentrations are *** the increasing deuterium concentration,the Raman peaks which are assigned as the internal vibrations of the(H/D)_(2)PO_(4)^(-)anion shift to lower *** red-shift contributes to the decrease in the bonding force of the P–O bond as a result of the substitution of deuterium for ***,the intensity of the strongest peak of these crystals decreases first,and reaches the minimum value while the mole percentage of the deuterium content in the crystal is about 74%.After that,the intensity increases with the increase of the deuterium concentration in the crystal.

关键词： bonding potassium substitution

NONLINEAR THEORY OF 3-dB HYBRIDCOUPLED POWER COMBINER

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Science China Mathematics 1991年第4期34卷 479-488页

作者：吴正德王少庆唐小宏 University of Electronic Science and Technology of China Chengdu 610054 PRC

A complete nonlinear model of the 3-dB hybrid-coupled power combiner is proposed forthe first time and a set of state equations describing this nonlinear system are *** analysis on the hybrid-coupled power combiner is performed by using the Routh-Hurwitz stability criterion. All the operation parameters, such as the output power, thecombining efficiency, the operating frequency and the bandwidth, are calculated ***, it is possible to fulfil the computer-aided analysis (CAA) and the computer-aideddesign (CAD) of complex corporation and tandem power-combining systems.

关键词： nonlinear theory power combining technique nonresonant power combiner hybrid-coupled power combiner.

Predicting Chaotic Time Series Using Recurrent Neural Network

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Chinese Physics Letters 2000年第2期17卷 88-90页

作者： ZHANG Jia-Shu XIAO Xian-Ci Department of Electronic Engineering University of Electronic Science and Technology of ChinaChengdu610054

A new proposed method, i.e. the recurrent neural network (RNN), is introduced to predict chaotic time series. The effectiveness of using RNN for making one-step and multi-step predictions is tested based on remarkable few datum points by computer-generated chaotic time series. Numerical results show that the RNN proposed here is a very powerful tool for making prediction of chaotic time series.

关键词： series computer neural

Dexmedetomidine as an adjunct to peripheral nerve blocks in pediatric patients

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World Journal of Pediatrics 2022年第4期18卷 251-262页

作者： Jing Yang Yu Cui Rong Cao Qing-Hua Huang Qian-Qian Zhang Department of Anesthesiology The Affiliated HospitalSchool of MedicineUESTC Chengdu Women’s&Children’s Central HospitalNo.1617Riyue AvenueQingyang DistrictChengdu 610091China

Background Combining local anesthetics with dexmedetomidine(DEX)for nerve blocks has been tested and confirmed as an alternative technique to strengthen analgesia in adults,but the evidence supported this proposal in pediatrics was not convincing ***,we intend to conduct a meta-analysis to make an appraisal of the effects of DEX as a local anesthetic adjuvant on peripheral nerve blocks in *** The analysis has been registered on https://***/prospero/with the registration number CRD42021254029 on June 10th,***,Ovid MEDLINE,Embase and Cochrane central register were searched for the randomized controlled trials(RCTs)that are relevant to child/pain/DEX or block up to April 30,*** Eight RCTs were included for data *** pooled results showed a significantly reduced number of patients who required postoperative analgesics within DEX groups[odds ratio=0.1,95%confidence interval(CI)0.03-0.32,P<0.001].And DEX significantly prolonged the duration of analgesia of local anesthetics in the meantime[standardized mean difference(SMD)=4.93,95%CI 3.02-6.83,P<0.001].Nevertheless,adding DEX as an adjunct to local anesthetics would significantly decrease heart rate(SMD=-0.95,95%CI-1.45 to-0.45,P<0.001)and increase sedation score(SMD=1.6,95%CI 0.53-2.66,P=0.003)*** Adding DEX as an adjunct to peripheral nerve blocks can prolong analgesia until postoperative 8 hours in pediatric ***,the benefits should be weighed against the increasing risk of bradycardia and sedation in critical children.

关键词： Block Child Dexmedetomidine Pain

System Life and Reliability Modeling of a Multiple Power Takeoffs Accessory Gearbox Transmission

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Journal of Shanghai Jiaotong university(Science) 2022年第6期27卷 855-866页

作者： WANG Kai WANG Xianliang ZHU Jiazan OU Daisong PAN Daifeng AECC Sichuan Gas Turbine Establishment Chengdu 610500China

A mathematical model for system life and reliability of a multiple power takeoffs aeroengine accessory gearbox transmission is *** geometry model of gear train is distributed into several subsystems by different transmitted *** lives of each component are combined to determine the units,subsystems and entire system lives sequentially according to a strict series probability *** unit and subsystem interface models are defined to dispose the loads of common *** algorithm verification is presented and a numerical example is given to illustrate the use of this *** initial design could not fulfill the life requirement.A design modification shows that the gear train has a more balanced life distribution by strengthening the weak parts,and the overall life of entire system is increased above the design *** program can help the designer to approach an optimal accessory gearbox transmission design efficiently.

关键词： aeroengine accessory gearbox power takeoff gear train life model reliability numerical program

Surface carboxylation of iron oxide nanoparticles brings reduced macrophage inflammatory response through inhibiting macrophage autophagy

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Regenerative Biomaterials 2022年第1期9卷 414-423页

作者： Di Deng Shengxiang Fu Zhongyuan Cai Xiaomin Fu Rongrong Jin Hua Ai National Engineering Research Center for Biomaterials Sichuan UniversityNo.29 Wangjiang RoadChengdu 610064China Department of Radiology West China HospitalSichuan UniversityChengdu 610041China

Macrophage autophagy is a common biological response triggered by nanomaterials,which is closely related to the regulation of *** iron oxide(SPIO)nanoparticles have been used for study of autophagy response due to their broad biomedical ***,few reports have focused on how to regulate the macrophage autophagy response induced by SPIO *** this study,SPIO nanoparticles grafted with carboxyl groups were synthesized and for the comparison of macrophage autophagy with unmodified *** study on the correlation between autophagy and inflammation induced by the two kinds of SPIO nanoparticles was also included,and the one that grafted with carboxyl groups shows a reduction of autophagy and thereby caused a milder inflammatory *** proposed that the increased amount of albumin adsorption on the surface of carboxylated SPIO nanoparticles,a protein previously proven to attenuate autophagy,can be considered an important reason for reducing autophagy and *** general,the carboxyl modification of SPIO nanoparticles has been demonstrated to reduce inflammation by inhibiting macrophage autophagy,which may provide some insights for the design of nanomaterials in the future.

关键词： autophagy inflammation superparamagnetic iron oxide carboxylation

On Reed-Solomon Codes

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Chinese Annals of Mathematics,Series B 2011年第1期32卷 89-98页

作者： Qunying LIAO Institution of Mathematics and Software Science Sichuan Normal University Chengdu 610066 China

The complexity of decoding the standard Reed-Solomon code is a well-known open problem in coding *** main problem is to compute the error distance of a received *** the Weil bound for character sum estimate,Li and Wan showed that the error distance can be determined when the degree of the received word as a polynomial is *** the first part,the result of Li and Wan is *** the other hand,one of the important parameters of an error-correcting code is the *** most cases,one can only get bounds for the *** the second part,a formula for the dimension of the generalized trace Reed-Solomon codes in some cases is obtained.

关键词： Reed-Solomon code Weil bound Error distance Rational function Trace Reed-Solomon code Trace map

Semi-Discrete and Fully Discrete Mixed Finite Element Methods for Maxwell Viscoelastic Model of Wave Propagation

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Advances in Applied Mathematics and Mechanics 2022年第2期14卷 344-364页

作者： Hao Yuan Xiaoping Xie School of Mathematics Sichuan UniversityChengduSichuan 610064China

Semi-discrete and fully discrete mixedﬁnite element methods are consid-ered for Maxwell-model-based problems of wave propagation in linear viscoelastic *** mixedﬁnite element framework allows the use of a large class of exist-ing mixed conformingﬁnite elements for elasticity in the spatial *** the fully discrete scheme,a Crank-Nicolson scheme is adopted for the approximation of the temporal derivatives of stress and velocity *** estimates of the semi-discrete and fully discrete schemes,as well as an unconditional stability result for the fully discrete scheme,are *** experiments are provided to verify the theoretical results.

关键词： Maxwell viscoelastic model mixedﬁnite element semi-discrete and fully discrete error estimate stability.

Smith-Purcell radiation improved by multi-grating structure

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Chinese Physics B 2022年第4期31卷 320-325页

作者： Jing Shu Ping Zhang Man Liang Sheng-Peng Yang Shao-Meng Wang Yu-Bin Gong School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China

The photonic crystal structure has attracted much attention due to its ability to confine *** this paper,we present our study on an improved Smith-Purcell radiation from a simple metal photonic crystal excited by moving *** from the wide-band Smith-Purcell radiation from a single metal grating,the results show that the injected electrons could induce more dipole oscillations inside the multi-grating structure,and it leads to the enhancement of the radiation *** addition,there are strong resonances in metal multi-grating structure,and the resonance characteristics may narrow the radiation band,which leads to a radiation with an obvious peak in the ***,the multi-grating structure has the ability to enhance the radiation intensity and shape the radiation frequency *** optimizing the structure parameters,coherent and tunable Smith-Purcell radiation can be realized,and it provides a potential way to develop band-controllable light or THz radiation source.

关键词： Smith-Purcell radiation multi-grating resonance mode