her

摘要： Rational design and controllable synthesis of practical electrodes with high sta bility and activity at high current density for a hydrogen evolution reaction(HER)are critical for renewable and sustainable energy conversion.However,high-performance TiO_(2)-based electrocatalysts for HER are quite limited,and the cat alytic active centers still remain elusive.Herein,a simple strategy is demonstrated for the synthesis of TiO_(2)-carbon composite(TiO_(2)/C)with high HER performance and stability.The remarkable HER performance of TiO_(2)/C can be ascribed to the doping of carbon atoms,which leads to stronger hybridization of Ti 3d and O 2p orbitals,thus substantially improving the electrocatalytic efficiency.This study elucidates that the hydrogen evolution activity of oxide electrocatalysts can be largely improved by regulating their electronic structures by doping carbon atoms and also provides an effective strategy for designing heterostructured electro catalysts with high catalytic activity and stability at high current density for HER.

摘要： Featured with high power density,improved safety and low-cost,rechargeable aqueous zinc-ion batteries(ZIBs) have been revived as possible candidates for sustainable energy storage systems in recent years.However,the challenges inherent in zinc(Zn) anode,namely dendrite formation and interfacial parasitic reactions,have greatly impeded their practical application.Whereas the critical issue of dendrite formation has attracted widespread concern,the parasitic reactions of Zn anodes with mildly acidic electrolytes have received very little attentions.Considering that the low Zn reversibility that stems from interfacial parasitic reactions is the major obstacle to the commercialization of ZIBs,thorough understanding of these side reactions and the development of correlative inhibition strategies are significant.Therefore,in this review,the brief fundamentals of corrosion and hydrogen evolution reactions at Zn surface is presented.In addition,recent advances and research efforts addressing detrimental side reactions are reviewed from the perspective of electrode design,electrode-electrolyte interfacial engineering and electrolyte modification.To facilitate the future researches on this aspect,perspectives and suggestions for relevant investigations are provided lastly.

摘要： 本文通过静电纺丝和低温磷化过程,成功地合成了具有一维形态的Ni_(2)P/Mn_(2)O_(3)纳米纤维。Ni_(2)P/Mn_(2)O_(3)复合纳米纤维是高效的HER电催化剂,与磷化前MnNi_(2)O_(4)纳米纤维相比,Ni_(2)P/Mn_(2)O_(3)纳米纤维表现出增强的HER性能,电流密度为10m Acm^(-2)时,过电位仅为134mV,Tafel斜率为97.1mV dec^(-1),Ni_(2)P/Mn_(2)O_(3)可能是未来贵金属电催化剂的潜在替代品。化石燃料的消费不仅促进了经济进步,而且造成了环境污染,因此科学家被迫开发清洁、高效和可再生能源。氢气是一种有前途的能量载体,高能量密度的清洁燃烧的产品。

摘要： 电催化水裂解是一种制备清洁氢气的潜在方法,寻找一种催化剂提高电催化阴极析氢反应(HER)速率是研究热点。通过制备球形碳掺杂钴基催化剂并对其进行硫化或磷化处理以提高其催化性能。三种产物中,CoP/C催化性能最优。在酸性和碱性条件下,电流密度为10 mA·cm^(-2)时的析氢过电位分别为154 mV和89 mV,并且稳定性优良。该催化剂被进一步用作空气阴极,以构建用于能量转换的锌-空气电池。该电池的开路电压为1.35 V,维持50 h没有衰减,并且通过27 h的长期循环试验评估了其可充电性,电压间隙为1.2 V。这项工作为设计球形非贵金属多组分HER催化剂提供了新的策略。

摘要： 铁系金属具有资源丰富,其羟基氧化物、磷化物等具有很好的稳定性,组分易调等优点,被广泛用于OER催化电极。Fe、Co、Ni单金属及双金属复合电极被大量研究,均显示出优异的OER性能。文章综述了铁系金属化合物的制备及其电化学性能,并对未来的能源发展进行展望。

摘要： Hydrogen evolution reaction(HER),oxygen evolution reaction(OER),and oxygen reduction reaction(ORR)serve as the most promising electrochemical processes for renewable energy.Developing multifunctional electrocatalysts with high performance for HER,OER and ORR still remains a challenge.Herein,we report a facile method to prepare P,N-co-doped porous carbon encapsulated Fe-CoP(A-FeCoP/CPN)electrocatalyst through freeze drying,carbonization,and KOH activation.The acquired A-FeCoP/CPN possesses abundant pores with large surface area,which provides sufficient defect-rich sites for HER,OER,and ORR,in alkaline or acidic electrolytes.The A-Fe-CoP/CPN shows low overpotential and good stability for HER and OER in alkaline electrolyte.Density functional theory(DFT)computations reveal that the addition of Fe greatly facilitates the rate-determining step and overall catalytic pathway for both HER and OER.A-Fe-CoP/CPN also exhibits low half-wave potential(E1/2)for ORR,which indicates an enhanced performance than that of the noble Pt/C catalyst.Zn-air battery equipped with the A-Fe-CoP/CPN catalyst exhibits a high energy density(849 m Ah g^(-1))and a long-time stability at 5 m A cm^(-2).This finding not only offers a facile strategy to prepare porous carbon materials with defect-rich sites,but also provides guidance for developing multifunctional electrocatalysts for wide electrochemical reactions.

摘要： Introducing vacancy defects and unique morphology is an effective strategy to improve the catalytic performance of transition metal compounds.However,precisely controlling the amount of vacancy defects remains challenging.Here,we propose a facile and efficient hydrothermal accompanying an annealing method to synthesize a series of Mn-doped CoO nanomaterials with controllable oxygen vacancies and unique morphology.The oxygen vacancies amount can be precisely controlled by adjusting the Mndoping content and is positively correlated with catalytic performance.It was found that the oxygen vacancies amount can reach up to 38.2%over the Mn-doped CoO nanomaterials,resulting in ultra-high hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)catalytic activity(HER:25.6 and 37 m V at 10 m A cm^(-2);OER:301 and 322 m V at 50 m A cm^(-2))under both basic and acidic conditions,while reaching 10 m A cm^(-2) for an ultra-low cell voltage of only 1.52 V,which exceeds that of Pt/C/RuO_(2) and all reported non-noble metal oxide catalysts.The DFT calculations reveal oxygen vacancies can optimize H*and HOO*intermediates adsorption free energy,thus improving the HER and OER performance.Interestingly,the Mn-doped CoO with rich oxygen vacancies exhibits excellent antibacterial properties in vitro of biomedicine.This work provides new ideas and methods for the rational design and precise control of vacancy defects in transition metal compounds and explores their potential application value in electrochemical water splitting and biomedical fields.

摘要： The use of abundant elements in the earth as electrocatalytic hydrogen production catalysts is of great significance for hydrogen energy cycling.Herein,we report amorphous TiO_(2)-decorated CoP/NF(TiO_(2)–CoP/NF)as an excellent electrocatalyst for alkaline hydrogen evolution reaction(HER).The welldispersed amorphous TiO_(2)on nanoneedle-like CoP arrays preserves the crystal structure of CoP and changes its electronic structure by interfacial charge transfer.Compared to CoP/NF catalyst,the Ti O_(2)–CoP/NF composite catalyst exhibits high HER activity with an overpotential of 61 mV at 10 mA cm^(-2)and high stability.Importantly,it almost maintains the Volmer step as a rate-determining step(RDS)and the Tafel slope at a wide cathodic potential range showing the fast kinetics under large polarization regions.Theoretical simulations reveal that the combination of TiO_(2)and CoP selectively accelerates the hydrated K+diffusion,regulates the interfacial water orientation to adapt to the subsequent smooth water dissociation,and optimizes*H adsorption/H2desorption.The strengthened coupling of HER multi-scale-processes on transition metal compound composites catalysts is the underlying mechanism for improving HER activity.

摘要： 目的 探讨白蛋白紫杉醇治疗人表皮生长因子受体2(HER-2)阴性晚期乳腺癌的效果和安全性.方法 选取2013年1月至2019年9月中国科学院大学附属肿瘤医院收治的HER-2阴性晚期乳腺癌患者72例,均使用白蛋白紫杉醇治疗,分析临床疗效及安全性.结果 72例患者中,一线和二线使用白蛋白紫杉醇的患者共30例,完全缓解(CR)4例(13.33％),部分缓解(PR)12例(40％),疾病稳定(SD)14例(46.67％),客观有效率(ORR)为53.33％;三线及以上治疗42例,PR 18例(42.86％),SD 20例(47.62％),PD 4例(9.52％),ORR为42.86％.总体中位无进展生存期(mPFS)为6.13个月,一二线治疗mPFS为8.83个月,三线及以上治疗mPFS为4.70个月.中位总生存期为17.37个月.单因素及多因素分析显示,转移灶较原发灶分子类型改变和治疗线数是影响患者无疾病进展生存期的独立因素(均P<0.05).白蛋白紫杉醇治疗相关的不良反应主要表现为周围神经感觉病变及骨髓抑制.结论 白蛋白紫杉醇治疗HER-2阴性晚期乳腺癌患者疗效明显且安全,早线治疗能显著延长生存期.同时对于转移灶,建议取病理活检明确分子分型用以判断预后及调整治疗策略.

摘要： 目的 筛选影响乳腺癌组织中异常表达的DNA甲基转移酶DNMT3A的miRNA,并考察其对乳腺癌细胞生长的影响,以探讨miRNA对DNA甲基化甲基转移酶的调控在乳腺癌发生发展中的作用,从而为乳腺癌的早期诊断、早期预防提供新的分子标志及治疗靶点.方法 采用荧光定量PCR检测乳腺癌患者癌组织中DNA甲基转移酶的表达,通过Targetscan分析设计并合成3种miRNA模拟体,转染HER基因阳性乳腺癌细胞Sk-Br-3,应用实时荧光定量PCR检测转染后miRNA的相对表达量;应用免疫印迹分析及双荧光素酶报告基因实验筛选影响DNMT3A的miRNA;应用细胞生长曲线考察miRNA模拟体对Sk-Br-3细胞生长的影响.结果 实时荧光定量PCR结果显示:乳腺恶性导管癌患者癌组织中DNMT3A及DNMT3B的表达均显著增高(P<0.01);免疫印迹分析与双荧光素酶报告基因结果均可见,与对照组比较,miR-29c可以显著抑制DNMT3A的表达,并抑制乳腺癌细胞Sk-Br-3的生长.结论 miR-29c可与DNMT3A3′端非编码区结合并抑制DNMT3A的表达,从而影响HER基因阳性的乳腺癌的发生发展.

摘要： Ni-S-Co alloy was prepared by electrodeposition in a modified Watts bath with addition of thiourea (TU) and CoCl2. The structure and morphology were determined by XRD and SEM respectively. The contents of S and Co were measured by EPMA. The electrochemical properties of the alloy used as a cathode, including hydrogen evolution overvoltage n (h.o.v.), Tafel slope b and exchange current density f were measured. The HER mechanism and steady-state behavior of Ni-S-Co alloy in alkaline media were also investigated. The results indicate that the structure of Ni-S-Co alloy obtained is amorphous and it shows much higher electrochemical activity than other electrodes including amorphous Ni-S and Ni-S(La) electrodes. The HER on Ni-S-Co alloy cathode is a fast Volmer reaction following a slow Heyrovsky reaction, and the high electrocatalytic HER property is mainly due to the large amount of adsorbed H atoms.

摘要： 本发明涉及气垫船运动控制领域，具体涉及的是一种基于纵向速度规划的气垫船高速回转控制方法。本发明采用基于侧滑角约束的航速规划方法解决了气垫船采用传统非线性反馈控制在高速回转时的失速问题，能够保证气垫船在回转的同时实现精确的航速跟踪，提高了气垫船的机动性和作业能力，本发明在保证气垫船在高速回转过程中准确跟踪期望艏向的同时避免回转率过大导致的甩尾现象，提高了气垫船在高速回转时的可靠性和安全性。

摘要： 本发明适用于材料技术领域，提供了一种低光泽度聚氯乙烯材料及其制备方法、应用，其中，所述低光泽度聚氯乙烯材料包括以下重量份数的原料：聚氯乙烯树脂80～100份、稳定剂1～10份、增塑剂4～15份、加工助剂0.8～5份、改质剂4～15份、消光剂0～5.5份以及润滑剂0.5～5份。本发明通过稳定剂、增塑剂、加工助剂、改质剂、消光剂以及润滑剂各原料的合理配比，配合特定种类的聚氯乙烯树脂，所得到的低光泽度聚氯乙烯材料，不仅易于加工成型、且具有较为优异力学性能，且低光泽度，耐温以及成本低；另外，通过消光剂的加入可进一步降低材料光泽度的同时，进一步提高本发明聚氯乙烯材料机械力学性能，具有很好的经济效益。

摘要： 本发明涉及光纤耦合技术领域，尤其涉及一种高效率的叠阵型半导体激光器，包括激光源、光束整形组件、会聚透镜、鲍威尔棱镜组件和光纤；所述激光源发出的光束经过光束整形组件进行整形；整形后的光束经会聚透镜会聚，会聚后光束经过鲍威尔棱镜组件进行光束整形可以耦合进光纤的光束。本发明系统结构简单,便于操作,减少了操作步骤,光纤耦合效率达到84.3％。

摘要： 本申请公开了一种变频空调控制方法、装置、电子设备和介质。其中方法包括：获取空调的设置温度值，获取当前室内温度值；根据所述设置温度值、所述当前室内温度值和预设偏差阈值，确定所述变频空调的系统负荷率；获取当前室外温度值，获取所述变频空调的目标器件的信息；依据所述当前室外温度值、所述目标器件的信息以及所述系统负荷率，确认总传热温差；以达到所述总传热温差为目标，对所述变频空调的制冷系统进行控制，可以控制空调系统在不同负荷率下、不同室外温度值下运行在比较高的能效，实现空调系统节能运行。

摘要： 本发明涉及兽医生物技术领域，尤其涉及一种猪轮状病毒重组蛋白以及表达该蛋白的重组腺病毒和应用。所述所述重组蛋白由猪轮状病毒5型VP7蛋白和猪轮状病毒9型VP8蛋白连接组成，具体包括如SEQ ID NO:1所示的氨基酸序列。本发明将猪轮状病毒5型VP7蛋白和猪轮状病毒9型VP8蛋白的编码基因的基因序列构建至腺病毒表达载体中，并进行密码子优化，制备得到针对猪轮状病毒的重组腺病毒，该重组腺病毒表达的目的蛋白的结构和功能与天然状态完全一致，具有较高的安全性和免疫原性。

摘要： 本发明公开了一种改性TPEE电缆料及其制备方法，所述改性TPEE电缆料，按重量份数计，其组分包含改性TPEE100份，阻燃剂50‑100份，阻燃协效剂2‑10份，润滑剂1‑5份，抗氧剂1‑5份，助剂5‑10份。本发明提供的改性TPEE电缆料通过对TPEE接枝功能化石墨烯，以及对阻燃剂氢氧化镁进行改性，使其兼具优异的阻燃性能，力学性能，热老化性能以及加工性能，并且可回收利用，环境友好。

摘要： 本发明公开了一种路线规划方法，包括：获取N个订单的物流信息，所述物流信息包括订单地址，所述订单地址包括第一地址以及第二地址，其中，所述第一地址为目的地在直送范围内的地址，所述第二地址为目的地在直送范围外的地址，N为正整数；筛选出所述订单地址为所述第一地址的M个订单，确定配送M个订单的第一初始路线，对所述第一初始路线进行优化，得到第一优化路线，M为小于等于N的正整数；筛选出所述订单地址为所述第二地址的N‑M个订单，确定配送所述N‑M个订单的第二初始路线，对所述第二初始路线进行优化，得到第二优化路线。

摘要： 本发明公开了一种芳砜纶/四氧化三铁磁性长丝的制备方法，包括如下步骤：四氧化三铁磁性纳米颗粒制备、芳砜纶/四氧化三铁共混纺丝液制备、湿法纺丝，得到具有不同截面形状的磁性长丝。本发明可以实现芳砜纶的连续化湿法纺丝，制备过程温和可控；本发明将四氧化三铁磁性颗粒结合到芳砜纶纤维中，可以实现芳砜纶纤维的功能化，使得芳砜纶纤维具备磁性；本发明采用蛋白模板调控法制备四氧化三铁磁性颗粒，实现四氧化三铁磁性颗粒形貌及尺寸调控，同时使得纳米颗粒在纺丝液中分散均匀性；本发明制备的芳砜纶/四氧化三铁磁性长丝可用于保健、过滤、智能纺织品等领域。

摘要： 本发明属于污水处理技术领域，尤其是涉及一种污水水质预处理快速检测装置，包括检测水箱，检测水箱内壁上固定连接有第一竖板和第二竖板，第一竖板和第二竖板将检测水箱分隔成处理腔室、检测腔室和储存腔室，处理腔室内底壁上固定连接有向下延伸的梯形凸起，且梯形凸起内形成沉淀腔室，梯形凸起的下端固定连接有两根竖直的排污管，检测水箱的侧壁上固定连接有与处理腔室连通的污水进水管。优点在于：本发明可以对不同分层的污水进行水质检测，且多层之间的检测过程均为独立过程，不会出现相互之间的影响，能够对污水进行实时的检测，有助于后续的数据统计，另外采用分级式的检测方式，能够有效的对污水进行全面的检测，提高检测的质量。

摘要： 本发明公开了一种软硬件联合验证系统及方法。该系统包括：驱动软件、基于systemc模拟的存储器和异构集群；驱动软件嵌入在systemc框架中；驱动软件根据预设验证需求向异构集群发送驱动指令；存储器加载并保存待验证数据；异构集群根据驱动指令从存储器中提取待验证数据，计算得到输出数据，发送至驱动软件；驱动软件根据输出数据进行软硬件的联合验证。通过systemc模拟异构集群，驱动软件嵌入systemc框架，为驱动软件提供与硬件功能相等的模型，实现驱动软件对硬件的控制流程，协助软件前期的开发与调试，为硬件提供标准数据。解决了现有技术中软件与硬件在大多数的系统开发中分开进行，导致开发周期长的技术问题。