A dynamic monitoring and identifying system of Fe2O3 series gas sensors for the research of electronic nose is introduced. The system has 6 channels to input 0~2.5V voltage signals, measures system temperature, makes thermoregulation for sensor with hardware and has LCD screen and voice function. The heating circuit using TL494 chip and PWM mode is realized. Offline and online identification is realized. The hardware design is based on 16 bits MSP430F149 microcontroller. The software design for digital acquisition and identification based on Windows operating system is compiled by Visual Basic 6.0. The test results show that friendly interface, simple operation, accurate data, reliability and stability are obtained. The real-time monitoring for all of the sensors in aerometry or identification can be realized by BP ANN.
介绍了一种用于电子鼻研究的Fe2O3系列气敏传感器阵列动态测试、控制和识别系统；该系统能够同时采集6路0~2.5V的模拟电压信号，测量系统温度、硬件对传感器进行温度补偿，同时具有液晶显示和语音功能；加热电路用TL494芯片采用PWM方式实现，能实现脱机和联机两种不同的识别模式；以16位单片机MSP430F149为核心设计了硬件系统，用Visual Basic 6.0设计了基于Windows操作系统下的数据采集与模式识别软件；该软件界面友好，操作简单，数据结果准确，运行可靠、稳定，既可以长时间实时显示各传感器的全部动态响应过程，又可以用BP神经网络进行模式识别。
At that time, gas from time to time, the impact of the tongue base and obstruct vertical organizations such as the hanging, along with bursts of respiratory issued the sound cut off the nose.
这时，气体不时冲击舌根部及悬壅垂等组织，随着呼吸而发出阵阵劓声。
Volatile components were extracted by Solid Phase Microextraction, The extracts were isolated and identified by gas chromatograph-mass spectrometry and electronic nose respectively.
采用固相微萃取对产物中的挥发性风味成分进行提取，然后利用气相色谱－质谱和电子鼻两种方法，对其中的风味成分进行分析。
A dynamic generating toxic gas system and a nose-only exposure system were used for the pharmacokinetic study of inhaled environmental contaminants for benzene, toluene, xylene, ethylbenzene, chlorobenzene, styrene, isopropyl benzene, tetrachloroethylene, nonane and methylcyclohexane in male guinea pig.
用动态配气设备和鼻式吸入方式染毒，采用雄性豚鼠对环境中10种挥发性污染物(苯、甲苯、对二甲苯、乙基苯、氯代苯、苯乙烯、异丙苯、四氯乙烯、甲基环己烷和壬烷混合物)的吸入动力学进行了研究。
Among them the fault-lithology reservoir type is the most, second is fracture reservoir, the least is fault reservoir, oil and gas distribution is mainly situated near or tip of the nose of Shangjia nosing structure. The relationship of oil and gas distribution is complex, dominately controled by sandbody and fault connection and the continuity of sandstone.
其中以断层—岩性油气藏最多，其次是断层遮挡油气藏，最少是断块油气藏，油气分布在平面上主要在尚家鼻状构造的鼻尖部位及其附近，油水分布关系复杂，主要受砂体与断裂沟通情况及砂体分布连续性的控制。
Respiratory, including the passage of gas - nose, pharynx, larynx, trachea, bronchi, and gas exchange of organs - lungs.
呼吸器官包括气体的通道——鼻、咽、喉、气管、支气管，和进行气体交换的器官——肺。
Of course, this is not simply forget the existence of the body, but to eliminate from the eyes, ears, nose, tongue, body seeking relaxation arising out of the endless desire to shake off the desire to meet a result of various tie, your breath poly gas, the other hand, with pictures of the body to achieve transcendence.
当然，这并不是简单地忘记身体的存在，而是要消除由眼、耳、鼻、舌、身向外驰求所产生的无止境的欲望，摆脱为满足欲望而带来的种种牵累，凝神聚气，反观内照，实现对形体的超越。
To reveal aft end internal flow feature of a solid rocket motor with submerged nozzle, a two dimension cold flow test model with rectangular channel was designed The cold gas simulation was based on geometric similarity and aerodynamic analogy Mean and fluctuating velocity field was measured using phase doppler particle analyzer It showed that the flow separates at upstream of the submerged nozzle and reattaches on the tip of the nozzle nose A relatively steady recirculation zone formed in...
为了揭示含潜入喷管的固体火箭发动机尾部流动特征，按照几何相近和气动相似原则设计了通道为矩形的二维冷流实验模型，利用相位多普勒粒子分析仪对燃烧室尾部气流的时均速度和湍流脉动速度进行了测量。实验结果表明气流在潜入喷管入口上游发生分离，再附点位于喷管前端部外侧，背壁空腔内形成一个较为稳定的回流区，流场的轴向和横向湍流强度都比较大
Re-opening of the right thumb your nose so that the gas exhaled slowly from right nostril, with all the ideas so that the gas pressure from the chest and abdomen.
再放开右鼻孔的拇指，使气从右鼻孔缓慢呼出，用意念使气全部从胸腹部压出。
Electronic nose; milk detection; gas sensor array; principal component analysis; artificial neural network
电子鼻；牛奶检测；气体传感器阵列；主元分析；人工神经网络
The experiment shows the wall shear stress and the Sherwood number follows an analogous law. Their minimum appears at the nose of gas plug, while their maximum appears at the bottom of gas plug. The liquid flow direction on the wall is always downward, but it does not reverse in comparison with the developed slug flow.
实验结果说明，壁面剪应力与Sherwood数的变化规律类似，在弹状泡顶部达到最小，而在弹状泡底部达到最大：壁面流向一直向下，而没有类似充分发展弹状流的逆转。
The calculation and analysis results indicate: the flow direction of gas has to be changed when it flows around the nose and flows into horizontal convection pass in the furnace, which affects the pressure distribution in the furnace, and causes the flame center move toward the front water wall. Flame center moves downward with decreased swirl velocity of the second air injected from the arches. The second air injected from the front and rear water wall can balance the structure effect, and the flame center deviation can be effectively depressed by increasing the second air injected from the front and rear water wall.
计算与分析结果表明：折烟角与水平烟道强迫高温烟气流动方向改变，影响到炉膛内烟气压力分布，致使火焰中心偏向前墙；降低拱部燃烧器出口气流的旋流强度，火焰中心显著下移；从前后墙送入的二次风可有效平衡锅炉的结构效应，提高前后墙送入的二次风量可有效控制火焰中心向前墙的偏移。
It evaluates and selects eleven structures to be drilled for oil and gas exploration. These structures are Kadong anticline, Xihu anticline, Tugulu anticline, Dongwan anticline, Gaoquan anticline, Huoerguosi anticline, Manasi anticline, Well Fu-3 Faulted Nose, Anjihai anticline, Gumudi subtle anticline and Gumudi anticline.
评价和优选出可供钻探的11个构造，即卡东背斜、西湖背斜、吐谷鲁背斜、东湾背斜、高泉背斜、霍尔果斯背斜、玛纳斯背斜、阜3井北断鼻、安集海背斜、古牧地潜伏背斜、古牧地背斜等。
This invention discloses one portable electron nose system based on USB interface, whose smell test and data collection system comprises gas sensitive sensor array with gas input end connected to two electrical valve through three-way tube and two electromagnetic valve; wherein, its signal output end is connected to the data collection card through signal adjust; the data collection card output end is connected to computer through USB interface; gas control system comprises data collection card with output end connected to gas pump of switch circuit; in work, the computer opens gas pump by data collection card according to program firstly to switch gas path to smell collection status to convert the smell into electrical signals by data collection card to computer for process; the collection time is to switch gas path to clear status to delete the smell molecule for next collection.
本发明公开了一种基于USB接口的便携式电子鼻系统。其气味检测与数据采集系统，包括气敏传感器阵列，其气体输入端通过三通管与两只电磁阀相连，其信号输出端经信号调理后与数据采集卡相接，数据采集卡输出端由USB接口与计算机相连；气路控制系统，包括数据采集卡，其输出端分别与切换气路的电磁阀和气泵相连。工作时，计算机根据程序，由数据采集卡打开气泵，先把气路切换到气味采集状态，通过气敏传感器阵列将气味转换为电信号由数据采集卡传给计算机进行分析处理，采集时间过后再将气路切换到清洗状态，将吸附在气敏传感器阵列上的气味分子除掉以便下次采集。本发明可通过改变气敏传感器阵列中的气敏传感器方便地对不同气味进行采集分析。
When poison gas leaking, run against the wind. Use wet towel to cover your mouth and nose.
遇到化工厂着火，毒气泄漏，不要向顺风方向跑，要尽量绕到上风方向去，并尽量用湿毛巾捂住口、鼻。
The experiment shows the wall shear stress and the Sherwood number follows an analogous law. Their minimum appears at the nose of gas plug, while their maximum appears at the bottom of gas plug.
实验结果说明，壁面剪应力与Sherwood数的变化规律类似，在弹状泡顶部达到最小。
Based on the study of the theory and constituent of the electronic nose system, a set of combined gas sensor array system with artificial neural network, for detection of gas mixture is designed and constructed.
在分析研究电子鼻理论和系统组成的基础上，设计构建了一套传感器阵列与人工神经网络相结合的混合气体检测系统。
Independent component analysis (ICA) and back propagation (BP) neural network are used for pattern recognition of Electronic-nose. Considered the cross sensitivity of gas sensor array for improving the identify ratio to electronic-nose.
为了提高电子鼻对混合气体的识别率，针对气体传感器阵列的交叉敏感特性，探讨了在电子鼻系统中基于独立分量分析（ICA）算法与BP神经网络相结合进行模式识别的可行性。
The electronic nose for gas quantitative analysis is designed through combining gas sensor array with gray system theory.
将气体传感器阵列与灰色系统理论相结合，设计出用于气体定量分析的电子鼻。
The human body odor can also been analysis by Electronics nose and gas chromatography mass spectrometry (GC/MS).
电子鼻、气相色谱质谱等化学分析仪器也可用于人体气味的检测分析。