Dynamic Properties and Energy Conversion Efficiency of A Floating Multi-Body Wave Energy Converter

The present study proposed a floating multi-body wave energy converter composed of a floating central platform,multiple oscillating bodies and multiple actuating arms. The relative motions between the oscillating bodies and the floating central platform capture multi-point wave energy simultaneously. The converter was simplified as a forced vibration system with three degrees of freedom, namely two heave motions and one rotational motion. The expressions of the amplitude-frequency response and the wave energy capture width were deduced from the motion equations of the converter. Based on the built mathematical model, the effects of the PTO damping coefficient, the PTO elastic coefficient, the connection length between the oscillating body and central platform, and the total number of oscillating bodies on the performance of the wave energy converter were investigated. Numerical results indicate that the dynamical properties and the energy conversion efficiency are related not only to the incident wave circle frequency but also to the converter’s physical parameters and interior PTO coefficients. By adjusting the connection length, higher wave energy absorption efficiencies can be obtained. More oscillating bodies installed result in more stable floating central platform and higher wave energy conversion efficiency.

Optical properties of wavelength-tunable green-emitting color conversion glass ceramics

Color conversion glass ceramics are prepared by cosintering borosilicate glass frits and green 0.06Ce：Y2.94（Al1-xGax）5O12 phosphors. The crystal structures, the influence of Ga concentration on the photoluminescence （PL）, and reliability properties of the color conversion glass ceramics are investigated. The PL emission wavelengths of 0.06Ce：Y2.94（Al1-xGax）5O12 glass ceramics show blue shift from 545 nm to 525 nm with increasing Ga content （x value） under excited at 460 nm. Reliability test results show that the quantum yield （QY） of 0.06Ce：Y2.94（Al1-xGax）5O12 glass ceramics decreases from 70.60% to 59.06% with x value increasing from 0.15 to 0.35 under the ambient condition of 85℃/RH85% for the exposure time of 168 h. And the quantum yield （QY） of 0.06Ce：Y2.94（Al1-xGax）5O12 glass ceramics decreases from 65.13% to 52.23% after being soaked into boiled water for 4 h. The finding reveals that the addition of Ga can deteriorate the reliability of the color conversion glass ceramics.

Conversion of Andean montane forest to exotic forest plantation modifies soil physicochemical properties in the buffer zone of Ecuador's Podocarpus National Park

Background:Andean montane forests(AMF)are biodiversity hotspots that provide fundamental hydrological services as well as carbon storage and sequestration.In recent decades,southern Ecuador AMFs have been seriously threatened by increased logging and conversion to forest plantations with exotic species.In this context,our main objective was to evaluate the effects of AMF conversion to forest plantations on soil physicochemical properties in the buffer zone(Bz)of the Podocarpus National Park(PNP),in southern Ecuador.For this purpose,random samples were taken at a depth of 0-10 cm in four plots in each contrast zone and analyzed for bulk density,porosity,textural class,leaf litter depth,soil pH,as well as the contents of organic matter(SOM),soil organic carbon(SOC),total nitrogen,and available phosphorus and potassium.Results:The results indicate that the conversion of AMFs produces an increase in bulk density and a decrease in SOM,SOC,and total nitrogen contents,thus modifying soil properties,which could result in a decrease in water regulation capacity and produce an increased risk of soil erosion.This accelerates degradation processes,as well as threatens shortages of the drinking water supply.Conclusions:This study can help decision-makers to implement soil management plans in the Bz of the PNP,based on the implementation of new regulations,where the conservation of AMF is promoted.In addition,it is recommended to apply environmental restoration strategies in the anthropized areas of the AMF,as well as in the areas with exotic eucalyptus and pine plantations.

Frequency Up-conversion Luminescence Properties and Mechanism of Tm^(3+) /Er^(3+)/Yb^(3+) Co-doped Oxyfluorogermanate Glasses

Oxyfluoride glasses were developed with composition 60GeO 2 ·10AlF 3 ·25BaF 2 ·（1.95-x）GdF 3 · 3YbF 3 ·0.05TmF 3 ·xErF 3 （x=0.02,0.05,0.08,0.11,0.14,0.17）in mole percent.Intense blue（476 nm）,green（524 and 546 nm）and red（658 nm）emissions which identified from the 1G 4 →3H 6 transition of Tm3＋and the（2H 11/2 ,4S 3/2 ）→4I 15/2 ,4F 9/2 →4I 15/2 transitions of Er3＋,respectively,were simultaneously observed under 980 nm excitation at room temperature.The results show that multicolor luminescence including white light can be adjustably tuned by changing doping concentrations of Er3＋ion or the excitation power.In addition,the energy transfer processes among Tm3＋,Er3＋and Yb3＋ions,and up-conversion mechanisms are discussed.

Bio-Based Waterborne Poly(Vanillin-Butyl Acrylate)/MXene Coatings for Leather with Desired Warmth Retention and Antibacterial Properties

This study presents a solvent-free,facile synthesis of a bio-based green antibacterial agent and aromatic monomer methacrylated vanillin(MV)using vanillin.The resulting MV not only imparted antibacterial properties to coatings layered on leather,but could also be employed as a green alternative to petroleum-based carcinogen styrene(St).Herein,MV was copolymerized with butyl acrylate(BA)to obtain waterborne bio-based P(MV-BA)miniemulsion via miniemulsion polymerization.Subsequently,MXene nanosheets with excellent photothermal conversion performance and antibacterial properties,were introduced into the P(MV-BA)miniemulsion by ultrasonic dispersion.During the gradual solidification of P(MV-BA)/MXene nanocomposite miniemulsion on the leather surface,MXene gradually migrated to the surface of leather coatings due to the cavitation effect of ultrasonication and amphiphilicity of MXene,which prompted its full exposure to light and bacteria,exerting the maximum photothermal conversion efficiency and significant antibacterial efficacy.In particular,when the dosage of MXene nanosheets was 1.4 wt%,the surface temperature of P(MV-BA)/MXene nanocomposite miniemulsioncoated leather(PML)increased by about 15℃ in an outdoor environment during winter,and the antibacterial rate against Escherichia coli and Staphylococcus aureus was nearly 100%under the simulated sunlight treatment for 30 min.Moreover,the introduction of MXene nanosheets increased the air permeability,water vapor permeability,and thermal stability of these coatings.This study provides a new insight into the preparation of novel,green,and waterborne bio-based nanocomposite coatings for leather,with desired warmth retention and antibacterial properties.It can not only realize zerocarbon heating based on sunlight in winter,reducing the use of fossil fuels and greenhouse gas emissions,but also improve ability to fight off invasion by harmful bacteria,viruses,and other microorganisms.

Preparation of inorganic molten salt composite phase change materials and study on their electrothermal conversion properties

Due to their limitations in conductivity and shape stability,molten salt phase change materials have encountered obstacles to effectively integrating into electric heating conversion technologies,which are crucial in energy storage and conversion fields.In this study,we synthesized an inorganic molten salt composite phase change material(CPCM)with enhanced conductivity and shape stability using a gasphase silica adsorption method.Our findings revealed the regularities in thermal properties modulation by expanded graphite(EG)within CPCM and delved into its characteristics of electric heating conversion.The study elucidated that a conductive network is essentially formed when the EG content exceeds 3 wt%.Following the fabrication of CPCM into electric heating conversion modules,we observed a correlation between the uniformity of module temperature and the quantity of EG,as well as the distribution of electrode resistance and external voltage magnitude.Building upon this observation,we proposed a strategy to adjust the module temperature field with an electric field.Comparing the proposed direct electrical heating energy storage method with traditional indirect electrical heating methods,the energy storage rate increases by 93.8%,with an improved temperature uniformity.This research offers valuable insights for the application of molten salt electric heating conversion CPCMs.

MXene quantum dots of Ti_(3)C_(2):Properties,synthesis,and energy-related applications

The emerging two-dimensional MXene-derived quantum dots(MQDs)have garnered considerable research interest owing to their abundant active edge atoms,excellent electrical conductivity,and remarkable optical properties.Compared with their two-dimensional(2D)counterpart MXene,MQDs with forceful size and quantum confinement effects exhibit more unparalleled properties and have considerably contributed to the advanced photocatalysis,detection,energy storage,and biomedicine fields.This critical review summarizes the fundamental properties of MQDs in terms of structure,electricity,and optics.The mechanism,characteristics,and comparisons of two typical synthesis strategies(traditional chemical method and novel fluorine-free or chemical-free method)are also presented.Furthermore,the similarities and differences between MQDs and 2D MXenes are introduced in terms of their functional groups,light absorption capacity,energy band structure,and other properties.Moreover,recent advances in the applications of MQD-based materials for energy conversion and storage(ECS)are discussed,including photocatalysis,batteries,and supercapacitors.Finally,current challenges and future opportunities for advancing MQD-based materials in the promising ECS field are presented.

PREPARATION AND PROPERTIES OF SILICONE-ACRYLATE COPOLYMER LATEX

Silicone-acrylate copolymer latex was prepared through three different polymerization processes, i.e., the batch process, preemulsified monomer addition and the monomer addition process. The results revealed that the monomer addition process is a desirable approach to produce narrow particle size distribution latex with higher polymerization conversion and less amount of coagulum. The effect of silicone content on the glossiness and water absorption of latex film was investigated and the results showed that the glossiness of latex film is improved up to a silicone content of 10% of total monomers, but becomes impaired thereafter, whereas water absorption is reduced accordingly.

Synthesis of CaO-SiO_2-B_2O_3∶Sm_2O_3 Glasses and Luminescent Properties of Sm^(3+)

CaO-SiO2-B2O3 ：Sm2O3 glasses were synthesized in air atmosphere with conventional high temperature process. The optimal temperature of synthesis, the absorption spectrum and the luminescent properties of the glasses were studied. The fluorescence spectrum of Sm^3＋ was observed in CaO-SiO2-B2O3 ： Sm2O3 glasses. The fluorescence spectrum of the sample has three major emission bands peaking at 568, 605 and 650 nm respectively. The strongest emission band peak at 605 nm. It is concluded that the emissions were caused by the f-f transition of the 4f electrons of Sm^3＋. The emission bands peaking at 568, 604 and 650 nm correspond to the ^4G5/2→^6H5/2 transition, ^4G5/2→^6H7/2 transition and ^4G5/2→^6H9/2 trasition respectively. The luminescent properties of CaO-SiO2-B2O3 glasses indicate that the glass can convert the ultraviolet in the sunlight into red light, thus increasing the intensity of red light. The luminescent properties of these glasses may be used to make kinds of light-conversion glass for agriculture.

PHYSICAL PROPERTIES OF THE SYMMETRIC AND ANTISYMMETRIC MOTIONS AND RELATED ENERGY CONVERSION

The physical properties of the symmetric and antisymmetric motions,such as the conservation of the ab- solute angular momentum,the mutual conversions between various forms of energy,have been analysed by using the sets of equaticns in p-coordinates controlling the motions in the primitive equation model atmosphere.The results show that only the symmetric component of zoral geopotential difference caused by orography and that of the zonal frictional torque,have contribution to the change of the global angular momentum,and that the mutual conversions between various forms of energy,in addition to those similar to the results in the classical case, irclude those associated with the symmetric and antisymmetric motions.

煤储层含气性深度效应与成藏过程耦合关系

埋深是影响煤层气富集程度的综合要素,理解含气性深度效应是认识深浅部煤层气赋存状态与聚集机制的重要基础。基于煤层气勘探现状,在剖析鄂尔多斯盆地东缘煤层气探井资料的基础上,综合常规-非常规油气成藏地质学理论,探讨了煤层含气量、饱和吸附量、含气饱和度深度效应及其与成藏过程的耦合关系。煤层气成藏是构造沉降阶段生烃供气和回返抬升阶段相态转化、逸散的耦合结果,体现为自封闭成藏和浮力成藏的深度耦合,含气性变化存在饱和吸附量转折和游离气滞留两个关键深度界限,且二者不具备绝对同步性:(1)饱和吸附气量是煤在特定温压条件下的固有属性,不受保存条件的严格限制,其随深度的演化过程是控制相态转换的基础,压力梯度和变质程度补偿效应会引起现今区域饱和吸附量转折深度(带)的明显滞后。(2)游离气的运聚成藏与改造定型受控于地层回返抬升阶段的遮盖条件,涉及埋深-构造-水动力场三元耦合效应及浮力、储盖层毛管力的综合影响,抬升幅度小且改造强度弱时方可具备游离气滞留保存条件,滞留深度以浅地层封闭性降低,游离气普遍散失。鄂尔多斯盆地东缘柳林-延川南一带煤层总含气量随埋深增大近乎线性增高,深部收敛趋势不明显,不同变质程度煤理论饱和吸附量转折深度为1600~2200 m,但煤阶的区域分异致使原位饱和吸附量随埋深持续增大;大宁-吉县区块游离气滞留临界深度约2000 m,2500 m处含气饱和度平均约120%,3000 m处含气饱和度预计可达136%。不同地区煤层气成藏背景和地质条件存在差异,含气性深度效应需具体分析,分析重点应聚焦于甲烷相态转换、地层封闭条件的时空演化对现今气、水分布的综合影响,以实现深部煤层气的分区分带评价和高效开发设计。

Er掺杂PbF_(2)晶体的局域团簇结构与光谱性能研究

本文采用Bridgman法成功生长了一系列Er∶PbF_(2)晶体。利用基于密度泛函理论的第一性原理计算详细研究了Er^(3+)在PbF_(2)晶体中的团簇效应。首次获得了Er∶PbF_(2)晶体的上转换发光特性(发光强度、颜色变化)与团簇结构之间的关系。研究发现,随着Er^(3+)浓度增加,团簇从单聚体向高阶构型演化,Er^(3+)离子之间的距离先减小后增大,这使得上转换发光中的红色发射强度先增大后减小,红绿发光比也在Er^(3+)浓度高于6.5%(摩尔分数)后逐渐减小,即发光颜色可以从红色调整为黄绿色。该研究证明了稀土离子团簇的结构演化可以调控Er∶PbF_(2)的光谱特性,为多色发光材料的设计提供一种新方法。

新时代我国产业知识产权信息服务现状问题及服务内容创新研究

本文对我国产业知识产权信息服务现状展开综览式调查,总结现有服务中的优势和缺点,对不足之处产生的原因进行溯源分析,并面向产业发展全链条中六类不同的服务对象群体进行了有关服务需求的深度访问。在研究结果的基础上对我国产业知识产权信息服务内容创新提出建议:以用户需求为导向,将专利信息分析业务、专利运营业务、专利数据库等功能进行整合,打造产业知识产权信息一站式服务模式,通过创新服务内容及定制个性化服务清单来实现服务提质增效,同时集合高端人才,以产业智库的形式对服务进行人才反哺。

专利转化信托之制度设计

专利转化率低制约了我国产业自主创新升级。专业人才缺乏,投融资渠道匮乏以及传统专利管理方式罅缺是制约专利转化的主要因素。信托与专利转化有机结合可利用信托专业化管理、投融资以及安全保障功能提高专利转化率。我国信托制度生效要件、受托人监督机制与受益人权利救济机制之罅缺制约专利转化信托的发展,应以信托财产“双重所有权”理念作为构建专利转化信托的制度基础,明确专利转化信托财产“确定性”要件并以专利权“移转”于受托人作为信托生效的充分必要条件,明确专利转化信托受托人资格,完善受托人信义义务机制之内部监督制度,增设专利转化信托监察人和专职监管部门进行外部监督,明确受益人物权救济机制。

缺席审判与违法所得没收程序的差异化构建与调适--以节省司法资源与追回国家资产为视角

缺席审判程序与违法所得没收程序在主要功能、适用对象上存在明显竞合。同时,二者在竞合的表象后面,在适用案件范围和适用条件上呈现出弱层次性,而在程序性质和证明标准上存在本质差别。缺席审判程序是刑事对人之诉,对案件的证明标准与普通案件无异;违法所得没收程序是对物之诉,带有强烈的民事程序属性,对案件的证明标准相对较低。二者存在的上述差异,尤其在证明标准方面的差异,为司法实践的程序选择适用提供了客观衡量基准。在具体程序选择问题上,检察机关可构建基于政策和法律的二元考量模式。此外,两种程序的竞合关系及存在的证明标准差异也使得二者具有互相转换的理论可行性。立足于当前司法实践和立法现状,可在补全各程序的必备条件后进行程序转换,这不仅可节省司法资源和追回国家资产,也有利于“一体构建追逃防逃追赃机制”。基于诉审关系,两种程序转换的主体应为检察机关。

高校知识产权转移与转化的制度与机制研究——以武警部队院校的管理范式创新为切入

区别于普通高校高度市场化参与的知识产权开源、运作与保护模式,武警部队院校在开展知识产权转移与转化管理的过程中面临着因自身特殊性带来的资源供给、运作驱动、成果转化等界域壁垒。在高校知识产权管理陷入创新同质化的今天,推进武警部队院校知识产权转移的整合管理,应关注管理要素与资源整合的特殊性,明确机构混乱、人员缺乏、事务交杂等建设推进难点,推动知识产权管理制度与机制建设的范式转型。保障技术产出与信息传递环境中各项管理要素的安全、高效运作,建设和优化同受众需求与开发支持相契合的、内部自研与技术转移相结合的管理体系,并通过全视角的资源整合与合规优化等,完成对现有管理平台的硬性改革与软性治理。

Ti掺杂非晶碳复合光热转换薄膜的制备及性能研究

光热转换薄膜是太阳能光热利用的核心部件,直接影响光热转换效率。采用反应磁控溅射技术,使用Ti靶和石墨靶制备了Ti/a-C:H/Ti(H)/a-C:H/Ti(L)/a-C:H复合光热转换薄膜,研究讨论了薄膜的形貌特征和结构组成,并对其光吸收特性进行了分析。结果显示:复合薄膜具有显著的光谱选择性特性,其中Ti和C以TiC形式存在于吸收层中;薄膜较高的表面粗糙度有助于增强光的吸收能力;复合薄膜的吸收率为0.91,发射率为0.13,具有优异的光学性能。

某三级甲等医院专利状况分析及对策研究

目的了解郑州大学第一附属医院2013—2022年专利申请和授权情况,发现专利管理工作中存在的问题,并探讨对策。方法统计医院2013—2022年专利数据,对专利申请和授权情况、授权专利类型分布、专利技术领域、有效率和转化情况进行分析。结果2013—2022年医院共申请专利5145件,获授权专利3385件。2013—2016年申请量和授权量持续上升,2016—2019年迅猛增长,并在2020年达到顶峰,随后申请量和授权量均下降;发明授权权利占比较低,实用新型授权专利占比较高;无效专利占授权专利总数的31.99%,且专利转化率低。结论医院专利申请量较大,但高质量专利申请占比较低,整体趋势并不乐观。建议建立完善的专利管理体系,加大经费扶持力度,完善专利奖励制度,加强专利管理人才队伍建设,建立高价值专利培育体系,健全专利转化平台建设。

Multifunctional WSe_(2)/Co_(3)C composite for efficient electromagnetic absorption, EMI shielding, and energy conversion

Currently,as the electromagnetic(EM)environment becomes increasingly complex,single-function EM materials can hardly resist the increasing electromagnetic interference(EMI),and there is an urgent need to develop multifunctional EM materials.In this work,multifunctional WSe_(2)/Co_(3)C was prepared by simple hydrothermal methods.Its dielectric performance and EM response were investigated.Efficient absorption,shielding performance,and energy conversion devices were customized.By tailoring the loading content,WSe_(2)/Co_(3)C can switch between EM absorption and EMI shielding.The maximum shielding effectiveness(SE)of WSe_(2)/Co_(3)C reached 36 dB,and high reflection loss(RL)of-60.28 dB and wide effective absorption bandwidth(EAB)of 6.16 GHz can be obtained at low thickness.The multiple EM attenuation mechanisms brought by the combination of two-dimensional(2D)WSe_(2) and magnetic Co_(3)C are considered to be the main reason for the enhanced EM attenuation ability.The WSe_(2)/Co_(3)C composite provides a viable candidate for developing multifunctional EM materials in 2–18 GHz.

不同光引发剂口腔复合树脂单体的设计合成及性能

背景:目前由树脂基质单体组成的牙科复合树脂充填物,是牙体缺损充填治疗的首选材料,但随着其在口腔环境中使用时间的延长,牙体组织继发龋以及充填材料磨损折断等问题随之而来,造成这些问题的主要原因是充填材料的聚合收缩及其与牙体组织的机械性能不匹配等。目的:通过加入不同组分的引发剂合成牙科新型复合树脂单体,以提升传统体系的双键转化率并进一步提高材料的力学性能。方法:将不同的引发剂加入3,3′,5,5′-四甲基联苯二酚型环氧丙烯酸酯树脂单体中,制备新型复合树脂基质体系:A组加入质量分数1.1%的樟脑醌,B组加入质量分数2.1%的1-苯基-1,2-丙二酮,C组加入质量分数3.1%的樟脑醌与1-苯基-1,2-丙二酮混合物(二者质量比为1∶1)。检测各组样品的双键转化率、聚合收缩率和机械性能。结果与结论:①B、C组双键转化率高于A组(P<0.05);B组聚合收缩率大于A组(P<0.05),C组聚合收缩率小于A组(P<0.05);②B、C组的挠曲强度、弹性模量、压缩强度均大于A组(P<0.05,P<0.01),B组的维氏硬度大于A组(P<0.05),C组的维氏硬度小于A组(P<0.01);③结果显示,1-苯基-1,2-丙二酮是一种性能较理想的引发剂,且1-苯基-1,2-丙二酮与樟脑醌联合应用可有效提高树脂基质体系的双键转化率,从而提高树脂的力学性能。