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Primary ectopic meningioma of the middle ear is relatively rare in clinical practice. It is often difficult to distinguish it from chronic otitis media or otitis media with effusion due to its similar and atypical clinical symptoms. We report a case of epithelial tympanic ectopic meningioma with the main complaints of otalgia, aural fullness, and hearing loss. It was accidentally discovered during tympanotomy due to the symptoms of recurring refractory secretory otitis media. This article briefly reviews the relevant literature in recent years, summarizes the characteristics of primary ectopic tympanic meningioma with intact tympanic membrane, and emphasizes the diagnosis and treatment strategy of the middle ear mass. [ABSTRACT FROM AUTHOR]

The flexible knitted polyester fabric was used as a base material and a three-layer composite coating was applied to the structure material by using ferrite,silicon carbide,and graphite absorbing materials,and the composites were prepared with different coating thickness.The influences of the thickness of the bottom layer,the middle layer,and the surface layer coating on permittivity's the real part,the imaginary part and loss tangent were discussed.The results show that the dielectric properties of the composite material are sound at low frequencies.The thickness of the coating has a clear influence on the permittivity's real part,the imaginary part and the loss tangent of the composite material.When the thickness of the bottom coating layer is 0.5mm,the thickness of the middle coating layer is 0.3mm,and the thickness of the surface coating layer is 0.3mm,the permittivity's real part,imaginary part,and loss tangent of the ferrite/silicon carbide/graphite coating composite material reaches the maximum value.

This paper proposed a resource allocation scheme based on the coalitional game. First, it used an admission control mechanism to provide services of mobile applications to the users given the available long-term reserved resources in a pool. And it introduced an optimization formulation to obtain the optimal decision of admission control. Then, for a given coalition of service providers, the revenue obtained from utilizing the resource pool had to be game shared among the service providers. It developed a coalitional game model for sharing the revenue. The simulation results show that the proposed method is effective, which can obtain the optimal strategies of service providers on capacity expansion such that their profits are maximized. [ABSTRACT FROM AUTHOR]

Recently, the hybrid wireless-optical broadband network integrating optical backbone networks, passive optical networks, and wireless access networks have been proposed to provide the high-bandwidth, low-cost, and ubiquitous communication connections. This paper considered the design of network coding-based multicast applications in such networks with the objective of maximizing the total network utility and minimizing the deployment cost. The problem was formulated as a mixed integer nonlinear programming problem and the exact solution is prohibitively complex. In order to make the problem more tractable, it developed a two-step optimization procedure that iteratively selected the optical network unit and gateways for the multicast sessions. During each iteration, it solved two subproblems a network coding design problem for the optical network and a user assignment and bandwidth allocation problem for the wireless network. The former was solved in a distributed way based on the Lagrangian-dual decomposition; the latter was solved based on the generalized bender decomposition. Simulation results illustrate the effectiveness of the proposed solutions. [ABSTRACT FROM AUTHOR]

Objective: To investigate the epidemic features of persistent genital chlamydial infection (GCI) in Tianjin area., Methods: We statistically analyzed the clinical data about the persistent GCI patients received at the Venereal Disease Clinic of Tianjin Medical University General Hospital from 2009 to 2011., Results: A total of 158 patients with persistent GCI were received from Tianjin area. The patients ranged in age from 19 to 67 years, 39.24% from 20 to 29 and 34.81% from 30 to 39 years, 36.71% with commercial occupation, and 55.06% with college education or above. The sex partners of the patients included their spouses (32.91%) and waitresses (41.77%). The incidence probability of persistent GCI was higher in the females (59.49%) than in the males. Many of the patients were complicated with infections of mycoplasma, syphilis, candida albicans, or condyloma acuminatum., Conclusions: The epidemic trend of persistent GCI is rather grim in Tianjin area. New measures have to be developed targeting the epidemiological features of persistent GCI for better prevention and control of the disease.

Objective: To investigate the epidemic trend and features of male genital herpes (GH) in Tianjin., Methods: We statistically analyzed the epidemiological data of the male GH patients received at the Venereal Disease Clinic of Tianjin Medical University General Hospital from 2006 to 2010., Results: A total of 130 cases of male GH were reported from 2006 to 2010, ranging in age from 18 to 76 years, with 31.54% aged at 30-39 years. Most of the patients were factory workers (30.77%) and clerks (30.00%). Those with high school education accounted for 61.54%, and those with college education 32.31%. The sex partners of the patients were mostly waitresses (60%)., Conclusion: The epidemic of GH has not been effectively controlled in Tianjin. New measures have to be developed targeting the changed epidemiological features of GH for better prevention and control of the disease.