一种干部培训电子证书的生成方法与系统

在干部教育培训过程中,传统培训证书信息收集、制作、核对和分发效率低、出错率高、成本高。文章提出一种干部培训电子证书的生成方法与系统,通过报名系统获取学员数据,经Web API接口完成数据集成,并对已有电子证书中电子照片进行面部识别算法纠错预处理;进一步对电子证书加密生成PDF文件,并发布至学员终端。证书认证为数据加密逆操作,可实现对证书真伪的校验,彻底解决了干部培训证书分类整理、核对、验证、归档等一系列技术问题。

化学类课外创新实验室管理探索与实践

课外创新类实验室作为培养学生创新能力的重要场所,是对教学类实验室的功能拓展和有益补充。化学类课外创新实验室因实验类别多样,其开放管理工作难度更大。本文以管理视角分析了面向本科生开放的化学类课外创新实验室存在的问题,从完善制度保障、明确安全责任、优化资源配置、仪器培训开放、创新管理模式等角度出发进行了管理方法的探索和实践,为创新型人才的培养提供有力支撑。

基于DDS的飞机协同设计数据分发系统

笔者介绍了基于DDS的飞机协同设计数据分发系统的实现,首先介绍系统的开发环境,其中包括软硬件配置。最后,对网络通信中异构系统数据格式适配器和数据分发服务DDS的发布/订阅的核心模块的两个主要功能模块进行了详细的介绍并给出实现方式。

The potential of domestic production and imports of oil and gas in China:an energy return on investment perspective

Concerns about China’s energy security have escalated because of the country’s high dependency on oil and gas imports, so it is necessary to calculate the availability of domestic oil and gas resources and China’s ability to obtain foreign energy through trade. In this work,the calculation was done by using the energy return on investment（EROI） method. The results showed that the EROIstnd（i.e., standard EROI） of China’s oil and gas extraction decreased from approximately 17.3：1 in 1986 to 8.4：1 in 2003, but it increased to 12.2：1 in 2013. From a company-level perspective, the EROIstnddiffered for different companies and was in the range of（8–12）：1. The EROI2,d（EROI considering energy outputs after processed and direct energy inputs） for different companies was in the range of（3–7）：1. The EROI of imported oil（EROIIO）declined from 14.8：1 in 1998 to approximately 4.8：1 in 2014, and the EROI of imported natural gas（EROIING）declined from 16.7：1 in 2009 to 8.6：1 in 2014. In 2015, the EROIIO and EROIING showed a slight increase due to decreasing import prices. In general, this paper suggests that from a net energy perspective, it has become more difficult for China to obtain oil and gas from both domestic production and imports. China is experiencing an EROI decline, which demonstrates the risk in the use of unsustainable fossil resources.

Uncertainty Analysis of Seepage-Induced Consolidation in a Fractured Porous Medium

Numerical modeling of seepage-induced consolidation process usually encounters significant uncertainty in the properties of geotechnical materials.Assessing the effect of uncertain parameters on the performance variability of the seepage consolidation model is of critical importance to the simulation and tests of this process.To this end,the uncertainty and sensitivity analyses are performed on a seepage consolidation model in a fractured porous medium using the Bayesian sparse polynomial chaos expansion(SPCE)method.Five uncertain parameters including Young’s modulus,Poisson’s ratio,and the permeability of the porous matrix,the permeability within the fracture,and Biot’s constant are studied.Bayesian SPCE models for displacement,flow velocity magnitude,and fluid pressure at several reference points are constructed to represent the input-output relationship of the numerical model.Based on these SPCE models,the total and first-order Sobol’indices are computed to quantify the contribution of each uncertain input parameter to the uncertainty of model responses.The results show that at different locations of the porous domain,the uncertain parameters show different effects on the output quantities.At the beginning of the seepage consolidation process,the hydraulic parameters make major contributions to the uncertainty of the model responses.As the process progresses,the effect of hydraulic parameters decreases and is gradually surpassed by the mechanical parameters.This work demonstrates the feasibility to apply Bayesian SPCE approach to the uncertainty and sensitivity analyses of seepage-induced consolidation problems and provides guidelines to the numerical modelling and experimental testing of such problems.

Analysis of Modern Agricultural Science and Technology Park Planning Based on Plant Experience——A Case Study of Jiuxi Agricultural Science and Technology Park in Yunnan Province

It is an inevitable trend to replace the traditional agriculture with modern agricultural science and technology park, but the excessively unified development mode, similar functions and feature loss of modern science and technology park have become the obstacles to its development. As a kind of structure view element with the highest life attributes, plants can make the modern agricultural science and technology park have more vitality. Therefore, combined with the case study of Jiuxi Agricultural Science and Technology Park, the modern agricultural science and technology park planning was analyzed based on the perspective of plant experience, with the aim to provide bases for the planning of featured modern leisure science and technology park.

Combined modality therapy for stage Ⅰ_B cervical cancer

Objective:To evaluate the current approaches for multimodality therapy for stage ⅠB cervical cancer.Methods:The relevant literature has served as a source for identified high or intermediate risks and management of stage ⅠB cervical cancer.Result:The high risks include pelvic lymph node metastasis(PLNM),positive resection margin(PRM),and the involvement of parametrium(IPM).The intermediate risks include deep stromal invasion(DSI),bulky tumor size(BTS),lymphovascular space invasion(LVSI).Adeno-carcinomatous histotype is the new risk feature relevant to poor prognoses.Both radical hysterectomy plus bilateral pelvic lymph node dissection(PLND) and radical radiotherapy have proven to be equally effective.Surgery is more performed for stage ⅠB1 disease;radiotherapy or chemoradiotherapy is preferable for stage ⅠB2 disease.For patients with one high risk or two of intermediate risks,radical hysterectomy plus PLND followed by concurrent chemoradiotherapy can improve overall survival(OS) and disease-free survival(DFS).Conclusion:The management should be individualized for stage ⅠB cervical cancer.The optimized multidisciplinary therapy can benefit patients with the best cure and minimum morbidity and complications.

Correlation between single nucleotide polymorphisms of 17β-HSD-1 and endometrial adenocarcinoma

Objective: To investigate the correlation between 17-beta-hydroxysteroid dehydrogenase type1(17β-HSD-1) gene polymorphisms and risk of endometrial adenocarcino-ma.Methods: Forty-one patients with endometrial adenocarcinoma were selected as experimen-tal group and twenty-seven healthy women were selected as control group.The three common single nucleotide polymorphism of 17β-HSD-1 gene at sites + 1004,+ 1322 and + 1954 were detected by allele-specific PCR(ASA-PCR).The allele frequencies were analyzed by SPSS13.0 software between endometrial cancer cases and controls.Results: We observed no significant difference in various frequency distribution between experimental group and control group.P1004= 0.994,P1322 = 0.974,and P1954 = 0.981.Conclusion: We found that three common SNPs with the 17β-HSD-1 gene were not associated with endometrial adenocarcinoma.We suggest that more research for 17β-HSD needs to explore.

基于算法应用的供电保障业务管理体系优化研究

针对以往供电保障业务开展过程中管理决策不科学等问题,分析了现有研究的不足之处,采用线性回归、失效模式及后果分析方法,研究合理的业务周期设置模型及合理分配业务开展所需的人力、物力资源,有效提升了业务管理和执行效率。

Influence of mass ratio and calcination temperature on physical and photoelectrochemical properties of ZnFe-layered double oxide/cobalt oxide heterojunction semiconductor for dye degradation applications

A visible light-active photoelectrocatalyst,ZnFe-layered double oxide(LDO)/cobalt(II,III)oxide(Co_(3)O_(4))composites were obtained by calcining the Co loaded ZnFe-layered double hydroxide(LDH)prepared by a hydrothermal and microwave hydrothermal method.The morphological studies revealed that the ZnFe-LDO/Co_(3)O_(4) composites exhibited a flower-like structure comprising Co_(3)O_(4) nanowires and ZnFe-LDO nanosheets.Further,when the mass ratio of Co(NO_(3))_(2)·6H_(2)O/LDH was 1:1.8 and the calcination temperature was 550℃,the ZnFe-LDO/Co_(3)O_(4) composite exhibited 93.3%degradation efficiency for methylene blue(MB)at the applied voltage of 1.0 V under visible light after 3 h.Furthermore,the Mott-Schottky model experiments showed that the formation of a p-n heterojunction between ZnFe-LDO and Co_(3)O_(4) could effectively inhibit the recombination of electrons and holes in the photoelectrocatalytic process.Meanwhile,free radical scavenging experiments showed that the active radicals of⋅OH played an important role in the degradation of MB.Therefore,the photoelectrocatalytic effect of ZnFe-LDO/Co_(3)O_(4) provides a simple and effective strategy for the removal of organic pollutants.

Electro-oxidation of 5-hydroxymethylfurfural in a low-concentrated alkaline electrolyte by enhancing hydroxyl adsorption over a single-atom supported catalyst

Electrocatalytic oxidation of 5-hydroxymethylfurfural(HMF)to 2,5-furandicarboxylic acid(FDCA),a sustainable strategy to produce bio-based plastic monomer,is always conducted in a high-concentration alkaline solution(1.0 mol L^(-1)KOH)for high activity.However,such high concentration of alkali poses challenges including HMF degradation and high operation costs associated with product separation.Herein,we report a single-atom-ruthenium supported on Co3O4(Ru1-Co3O4)as a catalyst that works efficiently in a low-concentration alkaline electrolyte(0.1 mol L^(-1)KOH),exhibiting a low potential of 1.191 V versus a reversible hydrogen electrode to achieve 10 m A cm^(-2)in 0.1 mol L^(-1)KOH,which outperforms previous catalysts.Electrochemical studies demonstrate that single-atom-Ru significantly enhances hydroxyl(OH-)adsorption with insufficient OH-supply,thus improving HMF oxidation.To showcase the potential of Ru1-Co3O4catalyst,we demonstrate its high efficiency in a flow reactor under industrially relevant conditions.Eventually,techno-economic analysis shows that substitution of the conventional1.0 mol L^(-1)KOH with 0.1 mol L^(-1)KOH electrolyte may significantly reduce the minimum selling price of FDCA by 21.0%.This work demonstrates an efficient catalyst design for electrooxidation of biomass working without using strong alkaline electrolyte that may contribute to more economic biomass electro-valorization.

数据驱动计算力学研究进展

以数字孪生、人工智能为核心的大数据理念正深刻影响着第四次工业革命,数据驱动计算力学在此背景下应运而生并展现勃勃生机.与此同时,航空航天等尖端工业领域对高性能材料与结构的先进制造与安全评估提出了更严峻的挑战,传统计算力学已很难实现成倍缩短产品研发周期、实时跟踪产品信息并提供解决方案的目标.因此,发展面向高性能材料与结构的数据驱动计算力学正当其时且刻不容缓.本文拟通过梳理数据驱动计算力学的部分研究现状,探讨数据驱动计算力学的发展趋势.

基于分层数据搜索的数据驱动算法研究

数据驱动计算力学是一种直接利用材料应力应变数据驱动力学仿真计算的新技术.该方法通过反复遍历数据库,为数据驱动模型中的每一个积分点搜索并匹配最佳应力应变数据,使得在高维度和高密度的大规模数据库时计算效率不高.在此背景下,论文提出一种分层数据搜索方案,替换原有的遍历式数据搜索方式,以提升数据驱动的计算效率.该方案的核心思想是将大规模数据库切割成多层级子数据库,并利用树形搜索原理,减小单次搜索数据的范围,降低数据搜索的时间成本,达到提升计算效率的目的.文中简要介绍了数据驱动计算力学的基本步骤,并给出了分层数据库的构造方案,最后结合算例,讨论了数据库分层数量和分层方式对数据驱动计算效率的影响.

Highly ordered arrangement of meso-tetrakis(4-aminophenyl)porphyrin in self-assembled nanoaggregates via hydrogen bonding

meso-Tetrakis（4-aminophenyl）porphyrin（TAPP） can self-assemble into nanostructures with different morphologies by a phase-transfer method.The morphologies（nanospheres,nanorods and nanothorns）of porphyrin nanoaggregates could be easily tuned just by changing the concentration of porphyrin in a proper solvent at room temperature.HRTEM images revealed the formation of highly ordered supramolecular arrays of TAPP,i.e. superlattice of TAPP molecules in nanoaggregates,which agreed well with the size of one molecule of TAPP.UV–vis absorption spectra showed an obvious red shift of the Soret band of TAPP,indicating the formation of J-aggregates of TAPP in nanoaggregates.

Elasticity-based-exfoliability measure for high-throughput computational exfoliation of two-dimensional materials

Two-dimensional(2D)materials are promising candidates for uses in next-generation electronic and optoelectronic devices.However,only a few high-quality 2D materials have been mechanically exfoliated to date.One of the critical issues is that the exfoliability of 2D materials from their bulk precursors is unknown.To assess the exfoliability of potential 2D materials from their bulk counterparts,we derived an elasticity-based-exfoliability measure based on an exfoliation mechanics model.The proposed measure has a clear physical meaning and is universally applicable to all material systems.We used this measure to calculate the exfoliability of 10,812 crystals having a first-principles calculated elastic tensor.By setting the threshold values for easy and potential exfoliation based on already-exfoliated materials,we predicted 58 easily exfoliable bulk crystals and 90 potentially exfoliable bulk crystals for 2D materials.As evidence,a topology-based algorithm indicates that there is no interlayer bondingtopology for 93%predicted exfoliable bulk crystals,and the analysis on packing ratios shows that 99%predicted exfoliable bulk crystals exhibit a relatively low packing ratio value.Moreover,literature survey shows that 34 predicted exfoliable bulk crystals have been experimentally exfoliated into 2D materials.In addition,the characteristics of these predicted 2D materials were discussed for practical use of such materials.