Properties of Self-recoverable Mechanoluminescence Phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) and Its Information Encryption Application

A novel self-recoverable mechanoluminescent phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) was developed by the high-tem-perature solid-state reaction method,and its luminescence properties were investigated.Ca_(5)Ga_(6)O_(14)∶Eu^(3+)can produce red mechanoluminescence,and importantly,it shows good repeatability.The mechanoluminescence of Ca_(5)Ga_(6)O_(14)∶Eu^(3+) results from the piezoelectric field generated inside the material under stress,rather than the charge carriers stored in the traps,which can be confirmed by the multiple cycles of mechanoluminescence tests and heat treatment tests.The mechanoluminescence color can be turned from red to green by co-doping varied concentrations of Tb^(3+),which may be meaningful for encrypted letter writing.The encryption scheme for secure communication was devised by harnessing mechanoluminescence patterns in diverse shapes and ASCII codes,which shows good encryption performance.The results suggest that the mechanoluminescence phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+),Tb^(3+)may be applied to the optical information encryption.

团体心理辅导对大学生自尊影响的长期效果研究

目的探讨团体心理辅导对大学生自尊影响的长期效果。方法以团体心理辅导技术对河北师范大学59名学生进行长达一个学期的团体心理辅导。并于课程结束10个月后对辅导的效果进行再评估。结果①团体心理辅导对大学生的自尊干预有效,提高了大学生的心理健康水平,辅导前与辅导后差异显著（t=6.531,P〈0.001）;②团体心理辅导对大学生自尊的影响有长期效应,辅导后与辅导结束10个月后差异不显著（t=1.168,P〉0.05）。结论进行预防性干预的团体心理辅导能够帮助更多大学生了解自己在心理发展过程中要注意的心理问题,使其更好地认识自我和发挥潜能,防止并消除在其成长中可能出现的各种心理异常问题。

临床实习阶段高职护生的心理卫生现状分析及对策

目的了解临床实习高职护生的心理卫生现状及其影响因素,为制定有针对性地防治对策提供依据。方法采取分层整群抽样的方法随机抽取临床实习的高职护生,用症状自评量表(SCL—90)和自制调查问卷进行调查。资料用SPSS10.0统计分析。结果高职实习护生SCL-90因子得分高于常模;16.92%的护生有轻度的心理问题,2.31%的护生有中度以上的心理问题。实习中带教老师的教育方式、人际关系以及本人的实习态度对其心理卫生状况有一定影响。结论临床实习高职护生存在一定的心理卫生问题,实习管理工作者应尽快采取有针对性地预防对策。

MODBUS协议在stm32F103处理器上的实现

随着现代电子技术的迅速发展,电力仪表日益趋于智能化和网络化。为了实现电力仪表的实时监控,仪表之间的通讯显得尤为重要。MODBUS以其高效性、可靠性,广泛应用在电力行业。本文设计了一款以STM32F103微控制器为核心,基于MODBUS通讯协议的电力仪表通信接口。

3D flower-like heterostructured TiO_2@Ni(OH)_2 microspheres for solar photocatalytic hydrogen production

TiO2@Ni(OH)2 core-shell microspheres were synthesized by a facile strategy to obtain a perfect 3D flower-like nanostructure with well-arranged Ni(OH)2 nanoflakes on the surfaces of TiO2 microspheres;this arrangement led to a six-fold enhancement in photocatalytic hydrogen evolution. The unique p-n type heterostructure not only promotes the separation and transfer of photogenerated charge carriers significantly, but also offers more active sites for photocatalytic hydrogen production. A photocatalytic mechanism is proposed based on the results of electrochemical measurements and X-ray photoelectron spectroscopy.

Hydrogen storage performances of as-milled REMg_(11)Ni(RE=Y, Sm) alloys catalyzed by MoS_2

To compare the hydrogen storage performances of as-milled REMg11Ni-5MoS2(mass fraction)(RE=Y,Sm)alloys,which were catalyzed by MoS2,the corresponding alloys were prepared.The hydrogen storage performaces of these alloys were measured by various methods,such as XRD,TEM,automatic Sievert apparatus,TG and DSC.The results reveal that both of the as-milled alloys exhibit a nanocrystalline and amorphous structure.The RE=Y alloy shows a larger hydrogen absorption capacity,faster hydriding rate,lower initial hydrogen desorption temperature,superior hydrogen desorption property,and lower hydrogen desorption activation energy,which is thought to be the reason of its better hydrogen storage kinetics,as compared with RE=Sm alloy.

Passive simulation method of turbine flow sensors based on the 6-DOF model

A passive simulation method based on the six degrees of freedom(6-DOF)model and dynamic mesh is proposed according to the working principle to study the dynamic characteristics of the turbine flow sensors.This simulation method controls the six degrees of freedom of the impeller using the user-defined functions(UDF)program so that it can only rotate under the impact of fluid.The impeller speed can be calculated in real-time,and the inlet speed can be set with time to obtain the dynamic performance of the turbine flow sensors.Based on this simulation method,three turbine flow sensors with different diameters were simulated,and the reliability of the simulation method was verified by both steady-state and unsteady-state experiments.The results show that the trend of meter factor with flow rate acquired from the simulation is close to the experimental results.The deviation between the simulation and experiment results is low,with a maximum deviation of 2.88%.In the unsteady simulation study,the impeller speed changed with the inlet velocity of the turbine flow sensor,showing good tracking performance.The passive simulation method can be used to predict the dynamic performance of the turbine flow sensor.

One new species of the genus Uenostrongylium(Coleoptera:Tenebrionidae) from China

One new species,Uenostrongylium scaber Yuan Ren sp.nov.(China,Zhejiang),is described.Habitus and illustrations are provided,and a key to the genus Uenostrongylium is also given.

Geometrically Nonlinear Random Responses of Stiffened Plates Under Acoustic Pressure

An algorithm integrating reduced order model(ROM),equivalent linearization(EL),and finite element method(FEM)is proposed to carry out geometrically nonlinear random vibration analysis of stiffened plates under acoustic pressure loading.Based on large deflection finite element formulation,the nonlinear equations of motion of stiffened plates are obtained.To reduce the computation,a reduced order model of the structures is established.Then the EL technique is incorporated into FE software NASTRAN by the direct matrix abstraction program(DMAP).For the stiffened plates,a finite element model of beam and plate assembly is established,in which the nodes of beam elements are shared with shell elements,and the offset and section properties of the beam are set.The presented method can capture the root-mean-square(RMS) of the stress responses of shell and beam elements of stiffened plates,and analyze the stress distribution of the stiffened surface and the unstiffened surface,respectively.Finally,the statistical dynamic response results obtained by linear and EL methods are compared.It is shown that the proposed method can be used to analyze the geometrically nonlinear random responses of stiffened plates.The geometric nonlinearity plays an important role in the vibration response of stiffened plates,particularly at high acoustic pressure loading.

Crystallization, Vitrification, and Gelation of Patchy Colloidal Particles

We present the phase diagrams for neutral patchy colloidal particles whose surface is decorated by different number of identical patches,where each patch serves as an associating site.The hard-core Lennard-Jones(LJ)potential and associating interaction are incorporated into the free energies of patchy particles in phases of the uid(F),random close packing(RCP),and face-centered-cubic(FCC)crystal.A rich phase structure of patchy particles with F-F,F-RCP,and F-FCC transitions can be observed.Meanwhile,the sol-gel transition(SGT)characterizing the connectivity of patchy particles is also investigated.It is shown that,depending on the number of patches and associating energy,the F-F transition might be metastable or stable with respect to the F-RCP and F-FCC transitions.Meanwhile,the critical temperatures,critical densities,triple points,and SGT can be significantly regulated by these factors.

Taxonomy of the genus Luprops from China, with description of the larva of Luprops horni(Coleoptera: Tenebrionidae)

The genus Luprops Hope, 1833 is distributed in Palaearctic, Oriental, Sino-Japanese and Afrotropical regions, including 3 new Chinese record species described in this paper. Eleven species of this genus are known in China. The new Chinese record species are: L. brancuccii Schawaller, 2013, L. kaszabi Schawaller, 1997 and L. rugosissimus Kaszab, 1980. A key to the known Luprops species and its morphological details are provided. In addition, larva of Luprops horni(Gebien, 1914) is reported for the first time.

Two new nocturnal species of the genus Anatolica(Coleoptera:Tenebrionidae:Pimeliinae)from the deserts of northwest China

Two new species of the genus Anatolica Eschscholtz,1831,A.badainica Ba,Ren&Liu sp.nov.and A.gurbantunggutica Ba&Ren sp.nov.,are reported from the deserts of northwest China.Both are described and illustrated.The circadian rhythms of these two new species are briefly discussed.

A new species of Ditrigona Moore(Lepidoptera:Drepanidae) in China, with a checklist to the triangularia-group

A new species, D. tenuiata in the triangularia-group of Ditrigona Moore, 1888 is described from Sichuan, China. The female genitalia of D. uniuncusa are described for the first time. Illustrations of external features and genitalia of this new species and related species are presented. A checklist to the triangulariagroup is also provided.

MF~2ResU-Net:a multi-feature fusion deep learning architecture for retinal blood vessel segmentation

Objective For computer-aided Chinese medical diagnosis and aiming at the problem of insufficient segmentation,a novel multi-level method based on the multi-scale fusion residual neural network(MF2ResU-Net)model is proposed.Methods To obtain refined features of retinal blood vessels,three cascade connected UNet networks are employed.To deal with the problem of difference between the parts of encoder and decoder,in MF2ResU-Net,shortcut connections are used to combine the encoder and decoder layers in the blocks.To refine the feature of segmentation,atrous spatial pyramid pooling(ASPP)is embedded to achieve multi-scale features for the final segmentation networks.Results The MF2ResU-Net was superior to the existing methods on the criteria of sensitivity(Sen),specificity(Spe),accuracy(ACC),and area under curve(AUC),the values of which are 0.8013 and 0.8102,0.9842 and 0.9809,0.9700 and 0.9776,and 0.9797 and 0.9837,respectively for DRIVE and CHASE DB1.The results of experiments demonstrated the effectiveness and robustness of the model in the segmentation of complex curvature and small blood vessels.Conclusion Based on residual connections and multi-feature fusion,the proposed method can obtain accurate segmentation of retinal blood vessels by refining the segmentation features,which can provide another diagnosis method for computer-aided Chinese medical diagnosis.

Notes on jumping spiders from Xizang:three new species and two new records in China(Araneae,Salticidae)

Three new species of jumping spiders from the Xizang region,China are described:Evarcha darthvaderi Yu&Zhang,sp.nov.(♂♀),Orcevia qogyigyacani Yu&Zhang,sp.nov.(♀),Synagelides yadong Ni,Yu&Zhang,sp.nov.(♀).Two species are newly recorded in China:Phlegra prasanna Caleb&Mathai,2015 and Ptocasius urbanii(Żabka,1981),and the female of P.prasanna is described for the first time.

Overview of the systematic reviews of premature ovarian insufficiency treated with acupuncture

Objective:To assess the reliability of the methodological quality and outcome measures of systematic reviews(SR)/meta-analysis of premature ovarian insufficiency(POI) treated with acupuncture.Methods:SR/meta-analysis of POI treated with acupuncture were searched on POI from the databases including PubMed,Web of Science,EMBase,the Cochran Library,Chinese biomedical literature database(SinoMed),China journal full-text database(CNKI),Wanfang data knowledge service platform(Wanfang)and VIP information Chinese periodical service platform(VIP),from inception to 1 st May 2021.Using A Measurement Tool to Assess Systematic Reviews 2(AMSTAR 2) scale and Grades of Recommendations Assessment,Development and Evaluation(GRADE) system,the methodological quality and outcome measures of the included studies were appraised.Results:Ten articles of SR/meta-analysis were included,published from 2015 to 2020.Using AMSTAR 2,5 articles of SR/meta-analysis were rated as critical low quality in methods,3 articles as low quality,and2 articles as moderate quality.The results of GRADE showed that among the 50 outcomes the quality of evidence of 22 outcomes was very low,that of 25 outcomes was low and that of 3 outcomes was moderate.Conclusion:The methodological quality and the reliability of outcome measures were not high in existing SR/meta-analysis on POI treated with acupuncture,which may affect the translation of the SR/metaanalysis findings into clinical practice.It is necessary to further strengthen the methodological quality and reporting standard of SR/meta-analysis,as well as the robustness of design and implementation of randomized controlled trials(RCTs),in order to generate high quality evidences for clinical decision-making and practice.

Clinical application of the second metacarpal bone lateral needling

Objective： To explore the rules of the second metacarpal bone lateral needling in clinical application and its characteristics so as to provide the guidance to clinical practice.Methods： Taking ＂the second metacarpal holographic acupuncture therapy＂ ＂the second metacarpal bone lateral needling＂ and ＂the second metacarpal bone＂ as the search terms, the papers on the second metacarpal bone lateral needling were retrieved from China National Knowledge Infrastructure（CNKI）and Wanfang database from January 1, 1974 to December 31, 2016 and were screened. Using the Excel2003, the database of the diseases treated by the second metacarpal bone lateral needling was set up.The indications, the acupoints selection rules and needling manipulation of this therapy were analyzed.Results： A total of 1103 papers were retrieved, of which, 446 papers were from CNKI and 657 from Wanfang database. According to the inclusion and exclusion criteria, 54 papers were included for analysis finally. It was found that the indications of the second metacarpal bone lateral needling were predominated by the soft tissue injuries, especially acute lumbar sprain, ankle sprain and knee joint injury. Regarding the acupoints selection rules of the second metacarpal bone lateral needling, the corresponding points and tender points were commonly selected. Regarding the needling manipulation, the strong stimulation was required after needle insertion and the patient was required to move the affected areas while keeping the strong needling sensation. The needles were inserted 20 mm in depth along the skin mainly.The even-needling technique was exerted and the needles were retained for 30 min mainly.Conclusion： The second metacarpal bone lateral needling is applied to the treatment of soft tissue injuries. It is applicable for some internal diseases. The strong needling sensation and the motion of the local affected area are required especially in treatment with this therapy.

Quantitative Assessment of the Ecological Vulnerability of Baiyangdian Wetlands in the North China Plain

Quantitative assessment of vulnerability is a core aspect of wetland vulnerability research.Taking Baiyangdian(BYD)wetlands in the North China Plain as a study area and using the‘cause-result’model,23 representative indicators from natural,social,sci-tech and economic elements were selected to construct an indicator system.A weight matrix was obtained by using the entropy weight method to calculate the weight value for each indicator.Based on the membership function in the fuzzy evaluation model,the membership degrees were determined to form a fuzzy relation matrix.Finally,the ecological vulnerability was quantitatively assessed based on the comprehensive evaluation index calculated by using a composite operator to combine the entropy weight matrix with the fuzzy relation matrix.The results showed that the ecological vulnerability levels of the BYD wetlands were comprehensively evaluated as Grade Ⅱ,Grade Ⅲ,Grade Ⅳ,and Grade Ⅲ in 2010,2011-2013,2014,and 2015-2017,respectively.The ecological vulnerability of the BYD wetlands increased from low fragility in 2010 to general fragility in 2011-2013,and to high fragility in 2014,reflecting the fact that the wetland ecological condition was degenerating from 2010 to 2014.The ecological vulnerability status then turned back into general fragility during 2015-2017,indicating that the ecological situation of the BYD wetlands was starting to improve.However,the ecological status of the BYD wetlands on the whole is relatively less optimistic.The major factors affecting the ecological vulnerability of the BYD wetlands were found to be industrial smoke and dust emission,wetland water area,ammonia nitrogen,total phosphorus,rate of industrial solid wastes disposed,GDP per capita,etc.This illustrates that it is a systematic project to regulate wetland vulnerability and to protect regional ecological security,which may offer researchers and policy-makers specific clues for concrete interventions.