Real-time homogenous translucent material editing

This paper presents a novel method for real-time homogenous translucent material editing under fixed illumination. We consider the complete analytic BSSRDF model proposed by Jensen et al. [ [JMLH01] ], including both multiple scattering and single scattering. Our method allows the user to adjust the analytic parameters of BSSRDF and provides high-quality, real-time rendering feedback. Inspired by recently developed Precomputed Radiance Transfer (PRT) techniques, we approximate both the multiple scattering diffuse reflectance function and the single scattering exponential attenuation function in the analytic model using basis functions, so that re-computing the outgoing radiance at each vertex as parameters change reduces to simple dot products. In addition, using a non-uniform piecewise polynomial basis, we are able to achieve smaller approximation error than using bases adopted in previous PRT-based works, such as spherical harmonics and wavelets. Using hardware acceleration, we demonstrate that our system generates images comparable to [ [JMLH01] ]at real-time frame-rates.     

3G室内分布系统设计与优化关键问题

首先对3G室内分布系统特点进行介绍,然后对其设计过程中的关键问题进行分析,并给出在后续网络优化过程中的常见问题和相应解决方案。     

Efficient encoding of IEEE 802.11n LDPC codes

Addressed is the issue of LDPC coding for the emerging IEEE 802.11n standard. An efficient encoding algorithm is proposed. The algorithm is simple and easy to implement. The memory requirement is trivial     

Dielectric loaded HTS resonators as frequency standards andlow-phase noise oscillators

High-quality, high-temperature superconducting (HTS) thin-films exhibit very low losses at microwave frequencies and, as a result, allow very high Q resonators to be produced. The size of such resonators may be significantly reduced by loading with low-loss single crystal dielectric. The potential for HTS dielectric loaded resonators as practical frequency standards and reference elements for low-phase-noise oscillators is assessed, with emphasis on operation at 60 K, a temperature readily attainable with compact Stirling cycle coolers     

Scattering center parameterization of wide-angle backscattered datausing adaptive Gaussian representation

We present a scattering center extraction algorithm to parameterize the backscattered data from complex targets collected over large angular apertures. This parameterization is based on a scattering center model of the target, but includes an aspect-dependent amplitude function for each scattering center. A two-dimensional (2-D) adaptive Gaussian representation (AGR) algorithm is used to extract the position and the amplitude function associated with each scattering center. The algorithm is tested with data generated by the Xpatch radar simulation code as well as chamber measurement data. The results show that a very good compression ratio can be achieved, resulting in a compact scattering center model of the target. Once such model is available, we can easily reconstruct range profiles and ISAR images at any aspect on the same plane with good accuracy     

微波在免疫组织化学中的应用

本文综述微波技术在免疫组织化学中的应用两头及其进展，着重介绍了微波在组织固定、抗原恢复和免疫染色方面的应用，并对微波免疫组织化学的应用前景进行了展望 。     

机械制图虚拟实验室的研究与设计

论述了一个网络化，信息化实验系统开发的方法和思路。该系统以虚拟技术为支撑，以图学教育的宗旨为核心，综合利用了虚拟技术的各种开发工具和理论，具有虚拟现实系统常有的特点，沉浸感，交互性，构想。     

硫磷化丙烯酸酯的合成及应用

以硫磷化合物和丙烯酸酯为原料，合成了硫磷化丙烯酸酯极压抗磨剂，该剂具有良好的热氧化安定性，水解安定性及抗乳化性能。用该剂复配抗氧剂，金属钝化剂，防锈剂及其它抗磨剂所调制的复合剂应用于32^#HM抗磨液压油中模拟数据全部达到标准要求指标。     

气流粉碎技术在氢氧化铝生产中的应用

论述了氢氧化铝粉体填料的用途、应用现状及加工现状,该产品目前在供应与需求方面显现出的矛盾.针对此项问题阐述了选用气流粉碎磨生产氢氧化铝粉体材料的目的、意义,充分对比了气流粉碎磨和普通万能粉碎磨的SiO2%,Fe2O3%,Na2O%,+320%、附水等产品质量指标,产能和电单耗等消耗指标.气流粉碎技术在氢氧化铝粉体生产中应用之后,氢氧化铝粉体填料的质量得到了比较大的提高,创造了可观的经济效益;同时,生产能力有较大幅度提高,且设备自动化程度高,有效减轻了职工的劳动强度.