Unsupervised Scale-Consistent Depth Learning from Video

International Journal of Computer Vision - We propose a monocular depth estimation method SC-Depth, which requires only unlabelled videos for training and enables the scale-consistent...     

基于体感技术的手势追踪与识别

体感技术使人们更直接的通过自己的肢体动作与电脑设备产生互动,减小了鼠标、键盘等传统输入设备带来的束缚。使用Kinect 体感设备,对体感关键技术及 Kalman滤波器算法进行了深入的研究,并在此基础上提出了一种基于骨骼坐标的手势识别算法。最后详细阐明了基于 Kinect 的手势追踪与识别系统的具体设计与实现方法。     

Effect of quantum noise on deterministic joint remote state preparation of a qubit state via a GHZ channel

Quantum Information Processing - Quantum secure communication brings a new direction for information security. As an important component of quantum secure communication, deterministic joint remote...     

Mechanism of Mitochondrial Connexin43′s Protection of the Neurovascular Unit under Acute Cerebral Ischemia-Reperfusion Injury

We observed mitochondrial connexin43 (mtCx43) expression under cerebral ischemia-reperfusion (I/R) injury, analyzed its regulation, and explored its protective mechanisms. Wistar rats were divided into groups based on injections received before middle cerebral artery occlusion (MCAO). Cerebral infarction volume was detected by 2,3,5-triphenyltetrazolim chloride staining, and cell apoptosis was observed by transferase dUTP nick end labeling. We used transmission electron microscopy to observe mitochondrial morphology and determined superoxide dismutase (SOD) activity and malondialdehyde (MDA) content. MtCx43, p-mtCx43, protein kinase C (PKC), and p-PKC expression were detected by Western blot. Compared with those in the IR group, cerebral infarction volumes in the carbenoxolone (CBX) and diazoxide (DZX) groups were obviously smaller, and the apoptosis indices were down-regulated. Mitochondrial morphology was damaged after I/R, especially in the IR and 5-hydroxydecanoic acid (5-HD) groups. Similarly, decreased SOD activity and increased MDA were observed after MCAO; CBX, DZX, and phorbol-12-myristate-13-acetate (PMA) reduced mitochondrial functional injury. Expression of mtCx43 and p-mtCx43 and the p-Cx43/Cx43 ratio were significantly lower in the IR group than in the sham group. These abnormalities were ameliorated by CBX, DZX, and PMA. MtCx43 may protect the neurovascular unit from acute cerebral IR injury via PKC activation induced by mitoKATP channel agonists.     

果蔬品质安全近红外光谱无损检测研究进展

我国果蔬产量和销量均居世界首位, 生产和消费正由产量规模型向质量效益型转变, 对果蔬品质安全检测的要求与日俱增。当前, 果蔬采后品质分级、安全检测和货架期评价尚处于人工或简单机械的粗略检测阶段, 果蔬的内在组分和内部缺陷采用破坏性抽检, 货架期采用人工经验式, 效率低且成本高。近红外光谱检测技术具有无损伤、快速绿色、适于现场检测和在线分析等优势, 适于构建果蔬快速、高精度、智能化的检测系统。本文分析了果蔬产业的发展现状及关键技术需求, 阐述了近红外光谱技术的基本原理, 分别从果蔬内部光传输特性、内在组分检测、隐形缺陷判识、货架期评价4个方面论述了国内外近红外光谱技术在果蔬品质安全检测应用中的最新研究进展, 深入分析了近红外光谱技术在果蔬品质安全检测中的存在的问题, 并指出了解决思路和进一步研究的方向。     

固相萃取净化-气相色谱法检测人乳中 持久性有机氯农药

目的 建立母乳中有机氯农药六六六和滴滴涕的检测方法, 并对北京、兰州和杭州三个地区的蓄积水平现状进行分析。方法 母乳样品用乙腈提取, 经过酸化的硅胶固相萃取柱净化, 浓缩后, 采用气相色谱仪检测。结果 8种农药的线性范围在5~200 ng/mL, 相关系数0.9955~0.9994, 定量限均小于2.6 μg/kg, 平均回收率在70%~122%, 相对标准偏差在3.91%~10.77%。结论 本方法结合磺化法和固相萃取法, 能有效去除基质中的杂质。通过方法学验证证明, 本方法操作简单、精确、快速, 适用于母乳中有机氯的检测。随着六六六、滴滴涕等持久性有机氯农药的禁用或严格限用, 母乳中持久性有机氯农药的蓄积水平明显降低。     

基于主成分分析法评价两种餐饮用油的煎炸性能

目的 分析两种常见餐饮用油(餐饮调和油A和餐饮调和油B)煎炸性能的差异,并对餐饮用油煎炸品质进行综合评估。方法 在模拟西式快餐实际油炸条件下进行煎炸薯条实验,考察了餐饮用油在油炸过程中十项品质指标,并利用主成分分析法(PCA)对两种餐饮用油在油炸过程中的煎炸性能进行综合评价。结果 餐饮用油品质指标间存在不同程度的相关性,PCA将10个品质指标缩减成2个综合性评价指标,累计贡献率达87.920%,反映了餐饮用油煎炸品质的大部分信息,并进一步提取出评估餐饮用油煎炸性能的5个关键指标,即过氧化值、极性组分、碘价、羰基值以及亚油酸/棕榈酸比值。主成分分析综合得分表明,在油炸过程中,餐饮调和油A得分较高,具有较好的煎炸性能。结论 本研究建立的餐饮用油煎炸性能评价体系为煎炸油的筛选和质量控制提供借鉴。     

iAES:面向网络安全博客的IOC自动抽取方法

网络威胁指标(IOC)作为网络威胁的行为特征,可以按照标准组织起来并部署在安全系统中防御攻击.博客是重要的网络威胁情报来源,及时从中收集网络威胁指标能够快速应对新的安全威胁,但人工阅读并抽取IOC的方式耗时耗力,所以我们迫切需要一种从网络安全博客中自动抽取IOC的方法.为此,本文提出了一种面向网络安全博客的IOC自动抽...     

How Unruh effect affects freezing coherence in decoherence

In this paper, we investigate the influence of the Unruh effects on the coherence dynamics in an open quantum system which is subject to a nondissipative flip channel. We find that Unruh effect does not affect the known initial conditions which guarantee freezing of coherence, while it decreases the amount of preserved coherence.