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地学层析技术在工程中的应用
自1985年以来,地学层析技术在中国被广泛地应用于工程探测中,并取得了大量的成果.地学层析技术目前主要包含着地震层析、电磁波层析和电阻率层析成像这三个技术途经.中国工程技术人员在观测仪器和数据处理的软件方面均做出了许多贡献和发展.在工业生产和深部探测方面,地震层析无疑是重要的-种手段.把速度图像和Q值图像结合起来可以很好的推断矿产、石油、资源以及地质构造.本文给出了我国在地震测深、矿产勘探和井间地震等方面成功应用的实例,并进行了分析讨论.
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Osteoporosis and consequent fracture are not limited to postmenopausal women. There is increasing attention being paid to osteoporosis in older men. Men suffer osteoporotic fractures about 10 years later in life than women, but life expectancy is increasing faster in men than women. Thus, men are living long enough to fracture, and when they do the consequences are greater than in women, with men having about twice the 1-year fatality rate after hip fracture, compared to women. Men at high risk for fracture include those men who have already had a fragility fracture, men on oral glucocorticoids or those men being treated for prostate cancer with androgen deprivation therapy. Beyond these high risk men, there are many other risk factors and secondary causes of osteoporosis in men. Evaluation includes careful history and physical examination to reveal potential secondary causes, including many medications, a short list of laboratory tests, and bone mineral density testing by dual energy X-ray absorptiometry (DXA) of spine and hip. Recently, international organizations have advocated a single normative database for interpreting DXA testing in men and women. The consequences of this change need to be determined. There are several choices of therapy for osteoporosis in men, with most fracture reduction estimation based on studies in women.
