We have proposed the Intelligent Operation Support System (IOSS) for sewage plants, which can be applied to bulking prediction and control for the activated sludge process. The IOSS can provide guidance and control me...
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We have proposed the Intelligent Operation Support System (IOSS) for sewage plants, which can be applied to bulking prediction and control for the activated sludge process. The IOSS can provide guidance and control messages to operators on actions to Lake based on various kinds of integrated information including on-line process data, image signals on microorganisms, heuristics on plant control and data analyzed manually. To get on-line microorganism image information, a high resolution submerged microscope was developed and applied in a full scale plant. By combining image data with heuristics, the loss allows prediction of the symptoms of abnormal phenomena like bulking occurrence, and then provides ways to control the abnormalities thus decreasing the operators' work loads. Furthermore, diagnosis methods for detecting sensor troubles are proposed. Simulation results indicate the IOSS is effective.
The following notes have been compiled for the guidance of authors who are preparingpapers for submission to Chinese Geographical *** of papersPapers may be sent for editorial consideration to the Editorial *** the ed...
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The following notes have been compiled for the guidance of authors who are preparingpapers for submission to Chinese Geographical *** of papersPapers may be sent for editorial consideration to the Editorial *** the editors has the responsibility for deciding whether a paper is to be accepted, re-jected or referred back to the author for amendment. He will be guided by the advice
To improve microwave hyperthevmia in cancer therapy, the thermal effect of fer-rimagnetic resonance (FMR) during microwave irradiation was studied. Resonant temperatureelevation (RTE) of single crystal grain and polyc...
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To improve microwave hyperthevmia in cancer therapy, the thermal effect of fer-rimagnetic resonance (FMR) during microwave irradiation was studied. Resonant temperatureelevation (RTE) of single crystal grain and polycrystal powder of resonant media was measuredalone and in imitative muscle and egg white and in mice. The results indicated that the RTE produced by FMR could be used to improve penetrationdeepness, heating selectivity and temperature distribution of microwave hyperthermia in cancertreatment. It was expected that the potential function of the FMR heating system would be ex-ploited greatly for cancer therapy, and then magnetically guided microwave hyperthermia thera-py, chemotherapy, radiotherapy and immunotherapy might he combined multiply within this sys-tem by means of the static magnetic field (SMF) and magnetic microcarrier. Limitation of reso-nant heating was also discussed in this paper.
The Army has not repaid overcharges that have been accumulated from inflated transient lodging charges. Moreover, we estimate thataccumulated overcharges increased to $157 million Army-wide before the Army stopped div...
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The Army has not repaid overcharges that have been accumulated from inflated transient lodging charges. Moreover, we estimate thataccumulated overcharges increased to $157 million Army-wide before the Army stopped diverting transient lodging funds to nonappropriatedmorale, welfare, and recreation activities in October 1991. At that time, the Army transferred $34 million to a separate account for transient lodging operations. On the basis of the accumulated overcharges that we reported in 1990, the Congress reduced the Armys operations and maintenance budget requests, which fund transient lodging operations, for fiscal years 1991 and 1992 by a total of $65 million.
The Naval Postgraduate School is currently conducting research in the area of autonomous underwater vehicles. 1 support of this research, the school has developed a testbed vehicle and graphic simulation. One of the m...
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The Naval Postgraduate School is currently conducting research in the area of autonomous underwater vehicles. 1 support of this research, the school has developed a testbed vehicle and graphic simulation. One of the major thrusts • the project is the development of a control system. This work explores the implementation and testing of a guidance scheme proposed by Kanayama called spatial acking. The method is evaluated with and without consideration for AUV dynamics. Spatial tracking is also com- ired with an earlier guidance scheme attributed to Kanayama known as cross track guidance. The NPS AUV testbed vehicle and simulator are also described within this work.
A pure pursuit guidance law is combined with a heading autopilot to provide accurate path keeping of submersible vehicles. The scheme is implemented and analyzed in both the horizontal and vertical planes. A complete ...
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A pure pursuit guidance law is combined with a heading autopilot to provide accurate path keeping of submersible vehicles. The scheme is implemented and analyzed in both the horizontal and vertical planes. A complete stability analysis is performed in order to evaluate regions of stable vehicle operations. Numerical integrations support the analytic predictions. Two distinct stability boundaries are established. In the first, the vehicle loss of stability is accompanied by the generation of oscillatory motions around the commanded path. In the second, loss of stability occurs with linearly increasing path deviation. The horizontal and vertical plane schemes are combined with a propulsion control law in order to achieve path tracking of a general commanded route composed of several straight line segments in three dimensional space.
Results concerning the relative importance of several processes which are responsible for the efficiency and speed of a scintillator are presented here. Arguments for concentrated (stoichiometric) materials are presen...
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Results concerning the relative importance of several processes which are responsible for the efficiency and speed of a scintillator are presented here. Arguments for concentrated (stoichiometric) materials are presented and illustrated in the case of Ce-pentaphosphate, (CeP5O14). The low density of this material does not make it a viable scintillator, but its remarkable simplicity and relatively easy technology make it perfect to study basic physical mechanisms of scintillation in concentrated materials. Based on studies of a series of CexLa1-xP5O14 crystals, we formulate general conclusions concerning the relative importance of the process starting with direct ionization of the emitting centers (Ce3+) versus long range gathering of electron-hole pairs. These conclusions provide guidance form optimizing speed and efficiency of future concentrated scintillators. In addition some peculiarities of the Ce-pentaphosphate luminescence are reported and interpreted.
Current angioplasty devices are limited by arterial wall dissection and perforation, and by early recurrence from inadequate debulking of lesions. This study evaluated intravascular ultrasound (IVUS) as guidance for c...
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Current angioplasty devices are limited by arterial wall dissection and perforation, and by early recurrence from inadequate debulking of lesions. This study evaluated intravascular ultrasound (IVUS) as guidance for concentric laser recanalization of arterial occlusions. Twelve, 2-4-cm-long canine iliac artery occlusions were treated at 2 weeks (organizing thrombus) to 12 weeks (firm fibrous lesions) using a Holmium:YAG laser (2,100 nm wavelength) in free running mode, FRM, (250-mu-sec pulse, 5 Hz), n = 9;and Q-switched mode, QSM (200 ns pulse, 6 Hz), n = 3. A 200-mu-m (n = 2) or 600-mu-m (n = 10) optic fiber was centered in the artery coaxial to a 5Fr rotating A scan IVUS probe. The fiber was positioned in the center of the artery distal to the lesion and slowly advanced through the obstruction. In 8 occlusions the same fiber was used as a guidewire for passage of either a 1.6-mm-(n=2) and/or 3.0-mm (n=6) diameter multifiber catheter (19 x 100 and 19 x 200-mu-m fibers, respectively) using FRM energy to further debulk the lesion. In all cases, IVUS guidance enabled concentric initial recanalization of occlusions, although 3 vessel perforations resulted from fiber deviation off the center of the lumen at a distance of 2 to 4 cm from the IVUS imaging element. Both QSM and FRM modes ablated tissue, with FRM modes producing more tissue fragmentation and thermal effect. IVUS images accurately diagnosed the location of lesions compared to angioscopic views and pathologic analysis of the specimens. This study suggests that IVUS guided laser energy may enable initial concentric recanalization of arterial occlusions if adequate tissue removal can be accomplished to provide continuous IVUS imaging as the recanalization proceeds.
The operation of electrical and electronic equipment within Sizewell B requires that the equipment withstands the environment within the reactor. In particular, this places stringent limitations on the temperature and...
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ISBN:
(纸本)0852965508
The operation of electrical and electronic equipment within Sizewell B requires that the equipment withstands the environment within the reactor. In particular, this places stringent limitations on the temperature and radiation tolerance of the system. The author considers the operations likely to be carried out within Sizewell B, describes some of the effects of radiation on electrical and electronic equipment and provides some guidance for increasing radiation tolerance to the desired levels.
CARINA is a new retrievable unmanned capsule designed by ALENIA SPAZIO under ASI (Agenzia Spaziale Italiana) contract. This paper deals with the operative attitude acquisition phase and the operative phase of its life...
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CARINA is a new retrievable unmanned capsule designed by ALENIA SPAZIO under ASI (Agenzia Spaziale Italiana) contract. This paper deals with the operative attitude acquisition phase and the operative phase of its life cycle. In the operative phase the control system must assure microgravity requirements. Two different type of actuators are used for the two different phases: 20N hydrazine thrusters for the first, magnetic coils and a reaction wheel for the second, and, consequently, two control systems techniques are used. The former is based on a new discrete time modeling of the system due to the PWM-like behaviour of the thrusters and results in a discrete controller able to guarantee robustness against parameter uncertainties. The latter is a scheduling technique based on a LOR approach and guarantees the fulfilling of microgravity requirements. All the simulations, performed on the ESA-MIDAS dynamics simulator, take into account atmospheric drag, solar pressure and gravity gradient disturbances, and show the effectiveness of the adopted approach.
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