摘要：A fast intra mode decision algorithm is proposed in this paper to reduce the complexity of H.264 encoder. The proposed algorithm adopted the pre-processing method based on edge feature in pictures to filter out some impossible prediction modes. Context information and pre-computed threshold are used to determine whether it is necessary to check the DC mode. This method is able to get rid of most of candidate modes so that only 66—150 modes are left for the final mode decision, instead of 592 modes in the case of full search （FS） method of H.264. Simulation results demonstrate that the coding time of the proposed algorithm falls down 71.70/0 compared with FS method, while the performance loss is trivial compared with FS mode decision scheme.

摘要：An adaptive outlier controlling multirate model based on Hong’s multirate kinetic model was represented in order to resist the outliers and utilize their useful information. Wavelet transform was introduced to detect and control the outliers. The multirate information extraction and the controlling of outliers were properly integrated to establish an adaptive outlier controlling multirate model. The proposed model was applied to multisensor state fusion with interacting multiple model (IMM), and a robust interacting multisensor state fusion algorithm was established based on adaptive outlier controlling multirate model. The Monte-Carlo simulation shows that it could improve the accuracy of fusion estimation by 70% compared to Hong’s algorithm and at least 14% to Xiao’s algorithm.

摘要：是因为 SVM 的训练复杂性高度依赖于设置的数据的尺寸，至于模式识别和机器学习为大规模数据采矿赞成了支持机器(SVM ) 不是的向量，这篇论文论述几何基于距离的 SVM (GDB-SVM ) 。Ittakes 在一个点和是的分类亢奋的飞机之间的距离分类根据理论分析和几何直觉统治，并且被设计。试验性的代码作为翻译并且编辑的系统是有 Microsoft Visual C++ 6.0 的导出的 fromLibSVM。五 GDB-SVM 的四预言的结果比对所有(OAA ) 的方法的那些好。五 GDB-SVM 的三预言的结果比对(天体观测卫星) 的方法的那些好。Experimentson 真实数据集合证明 GDB-SVM 比 OAA 和天体观测卫星的方法优异不仅，但是为大数据集合高度可伸缩当产生高分类精确性时。

摘要：在智能凝胶防伪系统中使用的光、热、电、pH等刺激响应性水凝胶,是一种有前途的信息加密和解密材料.然而单一刺激会限制高水平的防伪.因此,需要协同使用多种刺激来提升信息安全等级.本研究设计了一种高透明度的海藻酸钠-聚丙烯酰胺(SA-PAM)水凝胶作为基体,利用无机变色材料钼酸铵(Mo7)赋予其凝胶光致变色特性.此外,温敏材料聚N-异丙基丙烯酰胺(PNIPAM)可使凝胶在最低临界相变温度(LCST)下发生体积相变,进而改变凝胶的宏观状态,可以通过调整凝胶体系中亲水单体和疏水单体的比例来控制LCST.利用紫外线(UV)作为“墨水”输入信息,以温度作为“开关”来加密/解密信息.总之,该水凝胶具有出色的光致变色能力,可在10 s内着色,紫外光吸收率最高可达96.23%.利用水凝胶对光-热刺激展现出的非凡响应能力,可以实现其迅速显示和隐藏信息的功能,从而确保信息安全,这为光致变色水凝胶在信息加密领域的应用提供了一种新方法.

摘要：When a curling rock slides on an ice sheet with an initial rotation,a lateral movement occurs,which is known as the curling *** force of friction between the curling rock and the ice sheet changes continually with changes in the environment;thus,the sport of curling requires great skill and *** throwing of the curling rock is a great challenge in robot design and control,and existing curling robots usually adopt a combination scheme of a wheel chassis and gripper that differs significantly from human throwing movements.A hexapod curling robot that imitates human kicking,sliding,pushing,and curling rock rotating was designed and manufactured by our group,and completed a perfect show during the Beijing 2022 Winter Olympics *** switching between the walking and throwing tasks is realized by the robot’s morphology transformation based on leg configuration *** robot’s controlling parameters,which include the kicking velocity v_(k),pushing velocity v_(p),orientation angle θc,and rotation velocityω,are determined by aiming and sliding models according to the estimated equivalent friction coefficientμ_(equ)and ratio e of the front and back *** stable errors between the target and actual stopping points converge to 0.2 and 1.105 m in the simulations and experiments,respectively,and the error shown in the experiments is close to that of a well-trained wheelchair curling *** robot holds promise for helping ice-makers rectify ice sheet friction or assisting in athlete training.

摘要：A combination of hydrogels and microfluidics allows the construction of biomimetic three-dimensional(3D)tissue models in vitro,which are also known as *** hydrogel patterningwith awell-controlled spatial distribution is typically achieved by embedding sophisticated microstructures to act as a ***,these physical barriers inevitably expose cells/tissues to a less physiologically relevant microenvironment than in vivo ***,we present a novel dissolvable temporary barrier(DTB)strategy that allows robust and flexible hydrogel patterning with great freedom of design and desirable flow stimuli for cellular *** key aspect of this approach is the patterning of a water-soluble rigid barrier as a guiding path for the hydrogel using stencil printing technology,followed by a barrier-free medium perfusion after the dissolution of the *** and multiple tissue compartments with different geometries can be established using either straight or curved DTB *** effectiveness of this strategy is further validated by generating a 3D vascular network through vasculogenesis and angiogenesis using a vascularized microtumor *** a new proof-of-concept in vasculature-on-a-chip,DTB enables seamless contact between the hydrogel and the culture medium in closed microdevices,which is an improved protocol for the fabrication ofmultiorgan ***,we expect it to serve as a promising paradigm for organ-on-a-chip devices for the development of tumor vascularization and drug evaluation in the future preclinical studies.

摘要：调控金属活性位点的电子结构来发展高活性的选择性加氢反应催化剂对于可持续有机合成非常重要.但时至今日,这仍然是非常具有挑战性的课题.在本文中,我们将具有电子结构调节特性的超细PtRu合金纳米颗粒负载在CdS纳米棒上,成功构建了PtRu/CdS复合催化剂并研究了其光催化芳香族硝基化合物氢化还原性能.我们发现当以水为质子源时,所得复合催化剂表现出高效的光催化加氢活性.超快光谱研究和密度泛函理论计算揭示了合金的形成促进了光生载流子的分离并降低了氢化还原反应中决速步的能垒,从而显著提高了加氢活性.本研究通过合金化效应调节助催化剂的电子结构,为高活性助催化剂/光催化剂体系的理性设计开辟了一条新途径.

摘要：化学取代是有效调节分子电导,产生多通道输运、量子干涉效应和其他机制的关键方法.但分子骨架和侧基之间存在复杂的相互作用,目前仍未被研究清楚.在本工作中,我们结合扫描隧道显微镜裂结实验技术和第一性原理计算方法,深入研究了具有不同σ和π侧基的分子电导.实验结果及理论分析表明,σ侧基的加入引起了分子前线轨道的对称性破缺并加剧了分子内散射,从而导致电导的降低.相反,π侧基引入了额外的电荷传输通道,实现了电荷传输的多通道效应,增加了分子的电导.这些发现为未来分子功能化和分子电子器件的设计提供了坚实的基础.

摘要：Metal corrosion causes billions of dollars of economic losses *** a smart and new energy-harvesting device,triboelectric nanogenerators(TENGs)can convert almost all mechanical energy into electricity,which leads to great prospects in metal corrosion prevention and cathodic *** this work,flexible TENGs were designed to use the energy harvested by flexible polydimethylsiloxane(PDMS)films with ZrB_(2)nanoparticles and effectively improve the dielectric constant by incorporating ZrB_(2).The open-circuit voltage and short-circuit current were 264 V and 22.9μA,respectively,and the power density of the TENGs reached 6 W·m^(-2).Furthermore,a selfpowered anti-corrosion system was designed by the rectifier circuit integrated with TENGs,and the open-circuit potential(OCP)and Tafel curves showed that the system had an excellent anti-corrosion effect on carbon ***,the system has broad application prospects in fields such as metal cultural relics,ocean engineering,and industry.

摘要：A novel tunable optical power splitter, with a Y-branch waveguide based on the total internal reflection and a microprism with tunable index refraction, is presented. Numerical simulation of its optical performance shows that a high dynamic range, low optical loss, and relatively low wavelength-dependence can be achieved. This component offers numerous advantages such as ease for fabrication, low cost, and compact size, which are very useful for potential application in integrated optical devices.