Light-field fluorescence microscopy (LFM) is a powerful elegant compact method for long-term high-speed imaging of complex biological systems, such as neuron activities and rapid movements of organelles. LFM experiments typically generate terabytes of image data and require a substantial amount of storage space. Some lossy compression algorithms have been proposed recently with good compression performance. However, since the specimen usually only tolerates low-power density illumination for long-term imaging with low phototoxicity, the image signal-to-noise ratio (SNR) is relatively low, which will cause the loss of some efficient position or intensity information using such lossy compression algorithms. Here, we propose a phase-space continuity-enhanced bzip2 (PC-bzip2) lossless compression method for LFM data as a high-efficiency and open-source tool that combines graphics processing unit-based fast entropy judgment and multicore-CPU-based high-speed lossless compression. Our proposed method achieves almost 10% compression ratio improvement while keeping the capability of high-speed compression, compared with the original bzip2. We evaluated our method on fluorescence beads data and fluorescence staining cells data with different SNRs. Moreover, by introducing temporal continuity, our method shows the superior compression ratio on time series data of zebrafish blood vessels.

设计合成了一种含双酯基的1，2，3-三氮唑化合物，与罗丹明B酰肼结合生成了具有“开-关”性质的荧光探针（简称L₂），应用光谱学表征了L₂的物理化学参数。L₂分别在DMF/Tris-HCl（1∶1，v/v，pH=6.0，20 μmol/L）和MeOH（20 μmol/L）溶液中对Hg²⁺和ClO^-显示出高选择性和灵敏性；利用荧光和紫外光谱分别测定了L₂对19种金属离子和14种阴离子的光学性能。实验表明，Hg²⁺和ClO^-的存在使得L₂在585 nm和576 nm均有一个新的发射峰出现；同时伴随着荧光强度明显的增强，溶液体系发生了裸眼能识别的显色变化，表明Hg²⁺可以将罗丹明分子的酰肼闭环结构转换为开环结构，并以1∶2的比例方式生成了一种新配合物，这也被质谱、工作曲线、核磁滴定和TD-DFT计算的结果所证实；L₂对Hg²⁺和ClO^-的检测限分别为7.45 nmol/L和 0.67 μmol/L。此外，生物活性测定显示L₂对HeLa细胞有非常低的毒性，并且可用于HeLa细胞中Hg²⁺和ClO^-的细胞成像，表明L₂在体内可进行微测定Hg²⁺和ClO^-的巨大潜力。

在利用微电铸工艺制作惯性开关的过程中，经常会出现由于界面结合强度低而引起的铸层翘起问题。微电铸层与基板的界面结合强度低会降低微开关的制作成品率、延长制作周期、增加制作成本。针对这一问题，本文从界面钝化膜的角度，采用了“电解活化去除钝化膜”和“引入Cu过渡层”的方法。为探究钝化膜对界面结合强度的影响，通过Materials Studio软件对不同钝化膜去除率模型的界面结合能进行仿真计算，计算结果表明钝化膜去除率越高越有利于界面结合强度的提高，在完全去除钝化膜后界面结合强度提高了197%；为探究过渡金属对界面结合强度的影响，分别以Cu，Cr，Ti作为过渡层，与不锈钢基板和镍铸层建立结合层体系，计算体系的结合能，计算结果表明Cu与基板、Cu与铸层的结合能最高，与未引入过渡金属相比，引入Cu后界面结合强度提高了81%。在仿真研究结果的基础上，开展了电解活化实验，通过电解活化法去除了基板表面的钝化膜，实验结果表明：电解活化区域铸层的界面结合强度明显高于未活化区域铸层的界面结合强度；同时开展了铜过渡层实验，对比了有无Cu过渡层的界面结合强度，实验结果表明：引入Cu后，铸层的界面结合强度明显提高。在上述仿真和实验结果的基础上，制作出尺寸为23 mm×20 mm、总高度为900 μm的微惯性开关。

A real-time wavefront sensing method for arbitrary targets is proposed, which provides an effective way for diversified wavefront sensing application scenarios. By using a distorted grating, the positive and negative defocus images are simultaneously acquired on a single detector. A fine feature, which is independent of the target itself but corresponding to the wavefront aberration, is defined. A lightweight and efficient network combined with an attention mechanism (AM-EffNet) is proposed to establish an accurate mapping between the features and the incident wavefronts. Comparison results show that the proposed method has superior performance compared to other methods and can achieve high-accuracy wavefront sensing in varied target scenes only by using the point target dataset to train the network well.