Background/Aims: Esophageal squamous cell carcinoma is a common malignant tumor in recent years, and the key for improving the survival rate is early diagnosis and treatment. Computed virtual chromoendoscopy with the Fujinon intelligent color enhancement (FICE) system was reported to improve visualization of neoplastic and nonneoplastic lesions in gastroscopy and colonoscopy. The purpose of this study was to evaluate the value of FICE in the diagnosis of early esophageal squamous cell carcinoma and precancerous lesions. Materials and Methods: Two hundred fifty-seven patients with suspicious lesions of the esophagus were examined successively by FICE, magnifying FICE, Lugol chromoendoscopy, and magnifying Lugol chromoendoscopy in the hospital. The lesions and the intrapapillary capillary loop (IPCL, microvessels at the surface of esophageal carcinoma) were observed and compared with the pathologic diagnosis that was regarded as the golden standard. Results: The positive rates of early esophageal squamous cell carcinoma were 92.6% and 88.9% as examined by FICE and Lugol chromoendoscopy (p>0.05), and 96.3% and 92.6% as examined by magnifying FICE and magnifying Lugol chromoendoscopy (p>0.05), respectively. The magnifying FICE could observe the IPCL of the esophagus clearly. Early esophageal squamous cell carcinoma and high-grade intraepithelial neoplasia were mainly type IV and type V. Low-grade intraepithelial neoplasia and esophagitis were type II and type III, and normal esophagus was type I; however, the observation of the IPCL by magnifying Lugol chromoendoscopy was not clear. Conclusion: Fujinon intelligent color enhancement and magnifying FICE are complements to Lugol chromoendoscopy and magnifying Lugol chromoendoscopy in the diagnosis of early esophageal lesions.
Disposable bamboo fiber tableware is a novel type of
product that
utilizes sustainable, high-performance bamboo fiber to minimize plastic
pollution. In this study, we developed a high-utility bamboo fiber
tableware product by employing a novel hybrid fiber-membrane strategy:
We used a combination of steam explosion technology and mechanical
refining to achieve the “up-down” separation of bamboo.
During the molding process, slender bamboo fibers mixed with starch
were interwoven into a strong three-dimensional network structure,
which resulted in the abundant formation of physical interwinding,
fiber bridging, and hydrogen bonding. The above structural features
conferred excellent strength, water resistance, oil resistance, better
high- and low-temperature resistance, a low content of dissolved substances,
and the capacity for rapid degradation when compared with plastic
and polylactic acid tableware. We conducted a product life cycle evaluation
and found that replacing 20% of plastic tableware products with the
bamboo fiber tableware product developed herein would be equal to
reducing carbon emissions equivalent to 300,000 cars in a small city.
Silicon-aluminum composites with Si content of 42-70 wt. % were fabricated by an innovative method of liquid-solid separation. The microstructures and thermal conductivity analyzing and predicting by the Maxwell and Hasselman-Johnson models were executed. The results show that silicon particles in composites are near globular with dull angular and surrounded by the continuous Al matrix, and the interface among them is composed of element diffusion zone. The conductivities of four composites are beyond 120 W. m-1 .K-1 at 25°C but reduce with Si content adding. The coarse particle size is beneficial to the higher conductivity. The interface thermal resistance of composites obtained by theoretical calculation is 16.0×107 W.m-2.K-1, and using it the H-J model can be employed to predict the conductivity.
The key technology in monitoring and alarming was investigated, aiming at the data exception and system fault existing in digital campus information system. Data monitoring and management flow was proposed and a data monitoring platform combining monitoring and alarming as well as data management was established. According to the actual requirement of universities, a 3-layers data monitoring system on digital campus was designed and implemented. By accomplishing about 100 data monitoring tasks in multiple business activities, it met the expected result in the establishment and operation of digital campus.
Corrosion behavior in Zn and Zn-55Al baths were investigated on a Fe-based alloy, which was design to apply to hot-dip production lines as the anti-corrosion alloy. The results reveal that the Fe-based alloy shows excellent corrosion resistance both in pure zinc bath and Zn-55Al bath. And the reaction rate and intermetallic phase formation vary in different bath. In pure zinc bath, the intermetallic phases form on the Fe-base alloy is chiefly Fe-Zn phases contains Γ, δ and ζ phases. In Zn-55Al bath, the Fe-based alloy is comprised of Fe2Al5 and FeAl3 phases, and the outer layer is from bath itself. The more thickness the layer of Fe2Al5 phase, the more corrosion resistance of the alloy.
With the development of information, the number of applications is growing. The questions of cost, support, risk and safety also arise. In order to realize low cost and high efficiency, we have studied the efficient operation technologies, including application isolation technology, virtualization technology, performance evaluation technology, etc. Using these technologies, we have realized efficient integration of operation resources, comprehensive optimization of application performance, and high satisfaction of end users.
The quality of application maintenance is directly related to operating results, as well as the life cycle of applications. In today’s digital business environment, application failure or unexpected downtime can have a devastating impact on any organization. In order to ensure the stable and efficient operation of applications, we have studied the general framework of proactive application maintenance, researched and practiced efficient operation technology, established comprehensive operation support processes, formed a high level operation and maintenance team, and achieved good results at Tsinghua University.
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