二维大地电磁数据的聚焦反演算法探讨

 文中简要分析了当前地球物理反演中几种常用的模型目标函数，并根据聚焦反演成像方法的基本理论，在大地电磁反演目标函数中引入了一个新的稳定泛函，以代替传统最小构造或最大平滑准则下的模型目标函数。通过对自适应正则化共轭梯度法解最优化问题过程的研究，以及对几个典型模型的试算，并将其结果与传统反演算法结果进行对比分析，表明了本文方法的正确性和较高的计算精度。最后对雷—琼拗陷一条实测的测线的MT资料进行聚焦反演成像处理，并与同一测线的地震资料进行对比表明,聚焦反演结果具有很高的准确性。     

Antioxidant capacity and mineral content of pulp and peel from commercial cultivars of citrus from Brazil

Four Citrus species (C. sinensis, cvs. Pera and Lima; C. latifolia Tanaka cv. Tahiti; C. limettioides Tanaka cv. Sweet lime and C. reticulate, cv. Ponkan) grown in Brazil were characterised in relation to contents of minerals, ascorbic acid, total polyphenols and antioxidant capacity of pulps and peels. In general, the peels demonstrated significantly higher contents of all compounds than the pulps (p < 0.05), with the exception of the Pera orange pulp that presented the highest acid ascorbic content (68 mg/100 ml), while the Tahiti lime peel presented the lowest (8 mg/100 g). Citrus showed high levels of potassium, calcium and magnesium, and the peels were considered sources of these minerals. The Ponkan mandarin peel presented the highest antioxidant capacity. The antioxidant capacity of citrus was correlated both to vitamin C and phenolics. Aside from citrus pulps, the peels are also good sources of bioactive compounds and minerals, and can be explored for their health promoting values in food products.     

Towards Material Testing 2.0. A review of test design for identification of constitutive parameters from full‐field measurements

Full‐field optical measurements like digital image correlation or the grid method have brought a paradigm shift in the experimental mechanics community. While inverse identification techniques like finite element model updating or the virtual fields method have been the object of significant developments, current test methods, inherited from the age of strain gauges or linear variable displacement transducers, are generally not well adapted to the rich information provided by these new measurement tools. This paper provides a review of the research dealing with the design and optimization of heterogeneous mechanical tests for the identification of material parameters from full‐field measurements, christened here Material Testing 2.0 (MT2.0).     

家庭安全报警及家电智能控制系统的设计

介绍了家庭安全报警及家电智能控制系统的整体设计方案、系统各组成部分的工作原理和安装使用.该系统由主机、煤气报警装置、防盗报警装置、家电控制执行装置组成,系统主控芯片为SST89E564RD单片机,DTMF双音频信号接收发送主要由MT8888完成.系统主机与家用固定电话线相连接,可通过拨打主人家电话,对家用电器进行智能控制;同时当主人家中发生煤气泄漏、陌生人闯入等意外事件时,系统通过电信网络拨打特定的电话号码进行报警.     

Quantitative Analysis of Multiple Proteins of Different Invasive Tumor Cell Lines at the Same Single‐Cell Level

Tumor cell invasion is pivotal to the development, metastasis, and prognosis of tumors. It is reported that the invasive ability of tumor cells is mainly dependent on the expression levels of membrane type‐1 matrix metalloproteinase (MT1‐MMP) and integrin α_Vβ₃ proteins on cell membranes. To precisely distinguish between tumor cells with different invasive abilities, it is important to establish a highly sensitive and precise quantification method to differentiate the expression levels of MT1‐MMP and integrin α_Vβ₃ in the same single tumor cell at the same time. Herein, two functional peptides to construct red‐emissive Au₂₆ clusters and green‐emissive Ag₁₂ clusters are reported. Moreover, the Au₂₆ clusters and Ag₁₂ clusters have the ability to specifically target MT1‐MMP and integrin α_Vβ₃, respectively, in the same single cell at the same time. By utilizing the fluorescent properties and metallic compositions of metal clusters, the MT1‐MMP and integrin α_Vβ₃ levels of the more invasive SiHa cells or the less invasive HeLa cells are simultaneously and quantitatively differentiated via laser ablation inductively coupled plasma mass spectrometry. This method of quantitatively detecting multiple invasive proteins on the same cell is of great value for accurately diagnosing aggressive tumors and monitoring the invasiveness of these tumors.     

基于DTMF的煤矿井下安全警示系统的设计

介绍了以单片机AT89S52和DTMF信令解码芯片MT8870为核心,通过PSTN电话网络远程遥控煤矿井下安全警示系统的工作原理。从硬件接口和软件设计两方面阐述了铃流检测、模拟摘挂机、DTMF信令解码、密码检测、输入信号分析处理等功能的实现方法。     

数字式CMOS摄像头在智能车中的应用

介绍数字式CMOS摄像头MT9M011的工作方式;提出MT9M011在基于HCS12单片机的智能车控制系统中的应用方案,针对采集图像时遇到的问题给出了相应的解决方法;分析数字式CMOS摄像头相对于模拟摄像头的优势和不足。     

基于MT8880的ARM智能拨号器的设计和实现

设计实现了一个利用ARM控制MT8880芯片的智能拨号器系统.并对智能拨号器系统的各个硬件组成电路进行了详细的研究和说明.在软件设计部分,选用IAR EWARM作为系统的开发平台,就硬件主要功能模块,设计了相应的工作流程和VC++程序.系统已测试使用,测试结果表明系统功耗小、便于携带、功能易于扩展.     

MT及CSAMT方法在城市地热资源勘探中的应用

城市地热资源勘探的过程中诸多干扰因素的存在，严重制约了各种物探方法的应用，选择既能抗干扰又能保证勘探深度的方法是解决问题的关键．CSAMT抗干扰能力较强，对浅部不均匀体有较细致的刻画，MT方法对深部构造有较高的分辨率，利用前者资料对后者曲线首支进行解释并做综合反演，能较好地解决这一难题．结合某开发区地热资源勘探的实例，说明在电磁干扰较大的城区通过两种方法联合勘探，并利用其综合反演成果来推断以低阻为表现特征的热储层深度是行之有效的。     

基于高分辨率CMOS传感器图像采集系统的实现

为了解决高像素 CMOS 图像采集传感器 MT9T001和一些没有视频采集控制器的 DSP 接口难的问题,采用了2KB 容量的线缓冲 FIFO+CPLD 的方案,结合 TI 公司的6000系列 DSP 芯片TMS320C6711的 EMIF 接口,在 DSP 中设计了采集图像的中断程序,通过 DSP 将采集的图像写到 SD卡中,最终证明了本采集方案的可行。