高校在我国科技发展中的作用研究

高校进行科学研究是高校的重要职能之一。本文对高校科研投入、高校科研的成果、高校科研力量的分配，高校科研经费内部分配和中国高校科研与世界高校科研比较这五个方面进行了分析，发现了我国高校科研注重理论探索，忽视与实际生活的联系；重理工农医学，轻人文社科；高校科研总体实力不强等特点。     

On exponential stability for systems with state delays

This paper considers the issue of delay-dependent exponential stability for time-delay systems. Both nominal and uncertain systems are investigated. New sufficient conditions in terms of linear matrix inequalities(LMIs) are obtained. These criteria are simple owing to the use of an integral inequality. The model transformation approaches,bounding techniques for cross terms and slack matrices are all avoided in the derivation. Rigorous proof and numerical examples showed that the proposed criteria and those based on introducing slack matrices are equivalent.     

法的固有局限及其制约因素

在依法治国，建设社会主义法治的过程中，法律的规范和调整作用是巨大的，但不是万能的。因为，法律有其固有的局限性，而且还受多方面因素的制约。只有我们认识到了这些特点，才能够在实践中更好地发挥法的作用。     

A high performance frequency offset estimator for OFDM

INTRODUCTION Orthogonal frequency division multiplexing (OFDM) has become a promising technology for future wireless communication systems (Kim et al., 2003; 3GPP TSG-RAN-1.TR, 2004) due to its ability to transform a wideband frequency selective channel to a set of parallel flat-fading narrow-band channels, which substantially simplifies the channel equaliza- tion problem. However, a critical weakness of OFDM is its sensitivity to carrier frequency offset (CFO) since it can only t…     

Problems and Possible Solutions in Reading Comprehension Testing

The paper deals with the problems in reading testing papers. The author proposes some possible solutions, such as covering more cognitive skills being tested, increasing more text types, adding some other testing item types.     

High-timing-precision detection of single X-ray photons by superconducting nanowiresOA

Precisely acquiring the timing information of individual X-ray photons is important in both fundamental research and practical applications. The timing precision of commonly used X-ray single-photon detectors remains in the range of one hundred picoseconds to microseconds. In this work, we report on high-timing-precision detection of single X-ray photons through the fast transition to the normal state from the superconductive state of superconducting nanowires. We successfully demonstrate a free...     

工业系统综合自动化浅见

企业要想在世界市场激烈竞争中生存、发展、立于不败之地、必须生产出质优价廉的产品,为此,企业要普遍实现“智能控制”“智能优化”、“智能信息处理”、“分布式智能技术”。现代化工业系统的综合自动化是智能技术的典型工程应用系统,现代工业系统的需求是智能技术应用的本质动力。     

"消失在过去的日子里" ——浅析川端康成的掌小说《久违的人》

[经典文本] 久违的人 川端康成 "今天又遇见了久违的人呢." 最近父亲从学校回到家里,总是对女儿这样说.他多次重复谈及当天遇见的"久违的人"的事,大概隔三五天就谈一次. 父亲是一所私立学校的国文老师,退休之后,在别处任讲师之职.两个月前,儿子结婚,另立了门户,他就和女儿两人过日子.今年儿子33岁,算是晚婚了.女儿也已...     

子矩阵约束下矩阵方程XA＝B的对称非负定解

利用矩阵的广义逆及奇异值分解，给出了子矩阵约束下线性矩阵方程XA＝B有对称非负定解的充分必要条件，并在有解时，给出了相应解的一般表达式。     

A common variant in AAK1 reduces risk of noise-induced hearing lossOA

<正>Noise-induced hearing loss (NIHL) is one of the most common types of hearing loss and contributes to significant morbidity worldwide,as well as being the major cause of age-related hearing loss and tinnitus.The World Health Organization (WHO) estimates that 10%of the world’s population is exposed to sound levels that could potentially cause NIHL[1].It has been widely accepted that NIHL is a multifactorial genetic disorder with estimated heritability of 36%to 40%[2].Ideally,identificatio...